CROWN CASTLE INTERNATIONAL CORP
10-K, 2000-03-30
COMMUNICATIONS SERVICES, NEC
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<PAGE>

                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                              ------------------
                                   FORM 10-K
                              ------------------

               ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934
                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 1999

                       Commission File Number 000-24737


                       CROWN CASTLE INTERNATIONAL CORP.

            (Exact name of registrant as specified in its charter)

          Delaware                                       76-0470458
   (State or other jurisdiction                       (I.R.S. Employer
 of incorporation or organization)                   Identification No.)

        510 BERING DRIVE                                 77057-1457
           SUITE 500                                     (Zip Code)
        HOUSTON, TEXAS
(Address of principal executive offices)

                                (713) 570-3000
             (Registrant's telephone number, including area code)

<TABLE>
<CAPTION>

     Title of Each Class of Securities
     Registered Pursuant to Section 12(g)             Name of Exchange
    of the Securities Exchange Act of 1934            on Which Registered
- --------------------------------------------   -----------------------------------------
<S>                                                   <C>
Common Stock, $.01 par value                   The NASDAQ Stock Market's National Market

Rights to Purchase Series A Participating      The NASDAQ Stock Market's National Market
       Cumulative Preferred Stock
</TABLE>

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE SECURITIES EXCHANGE ACT
OF 1934: NONE.


     Indicate by check mark whether the registrant: (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X]  No[ ]


     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K.

     The aggregate market value of the voting stock held by non-affiliates of
the registrant was approximately $4,054.4 million as of March 15, 2000 based on
the NASDAQ closing price of $40.06 per share.


                    APPLICABLE ONLY TO CORPORATE REGISTRANTS

     As of March 15, 2000, there were 148,543,682 shares of Common Stock
outstanding and 11,340,000 shares of Class A Common Stock outstanding.


                      DOCUMENTS INCORPORATED BY REFERENCE

     The information required to be furnished pursuant to Part III of this Form
10-K will be set forth in, and incorporated by reference from, the registrant's
definitive proxy statement for the annual meeting of stockholders (the "2000
Proxy Statement"), which will be filed with the Securities and Exchange
Commission not later than 120 days after the end of the fiscal year ended
December 31, 1999.
<PAGE>

                       CROWN CASTLE INTERNATIONAL CORP.


                               TABLE OF CONTENTS

<TABLE>
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                                                                                                     PAGE
                                                                                                     ----
                                                    PART  I
<S>           <C>                                                                                    <C>
Item 1.       Business...............................................................................   1
Item 2.       Properties.............................................................................  34
Item 3.       Legal Proceedings......................................................................  35
Item 4.       Submissions of Matters to a Vote of Security Holders...................................  35

                                                    PART II
Item 5.       Market for Registrant's Common Equity and Related Stockholder Matters..................  36
Item 6.       Selected Historical Financial Data.....................................................  36
Item 7.       Management's Discussion and Analysis of Results of Operations and Financial
                 Condition...........................................................................  38
Item 7A.      Qualitative and Quantitative Disclosures about Market Risks............................  54
Item 8.       Financial Statements and Supplementary Data............................................  56
Item 9.       Changes in and Disagreements with Accountants on Accounting and Financial Disclosure...  90

                                                    PART III
Item 10.      Directors and Executive Officers of the Registrant.....................................  91
Item 11.      Executive Compensation.................................................................  91
Item 12.      Security Ownership of Certain Beneficial Owners and Management.........................  91
Item 13.      Certain Relationships and Related Transactions.........................................  91

                                                    PART IV
Item 14.      Exhibits, Financial Statement Schedules, and Reports on Form 8-K.......................  92
</TABLE>

<PAGE>

                                    PART I



ITEM 1.     BUSINESS

OVERVIEW

   We are a leading owner and operator of towers and transmission networks for
wireless communications and broadcast transmission companies. As of December 31,
1999, we owned, leased or managed 7,488 towers, including 5,319 towers in the
United States and Puerto Rico and 2,071 towers in the United Kingdom. We have
entered into agreements, which, when completed, will provide us with over 2,700
additional towers in the United States in 2000. In addition, we have recently
entered into an agreement which is contemplated to close in the second quarter
of 2000 and which will provide us with a tower portfolio of approximately 705
towers in Australia. Our customers currently include many of the world's major
wireless communications and broadcast companies, including Bell Atlantic Mobile,
BellSouth, AT&T Wireless, Nextel, Metricom and the British Broadcasting
Corporation.

   Our strategy is to use our leading domestic and international position to
capture the growing opportunities to consolidate ownership and management of
existing towers and other wireless and transmission infrastructure and to build
and operate new towers and wireless and transmission networks and infrastructure
created by:

   .    the transfer to third parties, or outsourcing, of tower ownership and
        management by major wireless carriers;

   .    the need for existing wireless carriers to expand coverage and improve
        capacity;

   .    the additional demand for towers and wireless infrastructure created by
        new entrants into the wireless communications industry;

   .    the privatization of state-run broadcast transmission networks; and

   .    the introduction of new digital broadcast transmission technology and
        wireless technologies.

   Our main businesses are leasing antenna space on wireless and broadcast
towers that can accommodate multiple tenants and operating analog and digital
broadcast transmission networks and wireless networks. We also provide related
services to our customers, including network design, radio frequency
engineering, site acquisition, site development and construction, antenna
installation and network management and maintenance. We believe that our full
service capabilities are a key competitive advantage in forming strategic
partnerships to acquire large concentrations of towers, or tower clusters, and
in winning contracts for tower acquisitions, management and construction along
with wireless and transmission network management.

   Our primary business in the United States is the leasing of antenna space to
wireless carriers. We believe that by owning and managing large tower clusters
we are able to offer customers the ability to fulfill rapidly and efficiently
their network expansion plans across particular markets or regions. Our
acquisition strategy has been focused on adding tower clusters to our tower
portfolio. As of December 31, 1999, we had tower clusters in 34 of the 50
largest U.S. metropolitan areas, and 68 of the 100 largest U.S. metropolitan
areas.

   Our primary business in the United Kingdom is the operation of television and
radio broadcast transmission networks. Following the 1997 acquisition of the
BBC's broadcast and tower infrastructure, we were awarded long-term contracts to
provide the BBC and other broadcasters analog and digital transmission services.
We also lease antenna space to wireless operators in the United Kingdom on the
towers we acquired from the BBC and from various wireless carriers along with
towers we have constructed. We have nationwide broadcast and wireless coverage
in the United Kingdom.

   Upon consummation of the agreement with Cable & Wireless Optus, we anticipate
that our primary business in Australia will be the leasing of antenna space to
wireless carriers. Upon completion of the Cable & Wireless Optus transaction,
Crown Castle Australia will own and operate a nationwide tower portfolio

                                       1
<PAGE>

of approximately 700 towers in Australia covering over 90 percent of the
population. See "--Recent and Agreed To Transactions--Cable & Wireless Optus
Transaction".

   We believe our towers are attractive to a diverse range of wireless
communications industries, including personal communications services, cellular,
enhanced specialized mobile radio, specialized mobile radio, paging, and fixed
microwave, as well as radio and television broadcasting.  In the United States
our major customers include AT&T Wireless, Aerial, Bell Atlantic Mobile,
BellSouth, Motorola, Nextel, PageNet, Metricom and Sprint PCS.  In the United
Kingdom our major customers include the BBC, Cellnet, Dolphin, NTL, ONdigital,
One2One, Orange, Virgin Radio and Vodafone AirTouch.

   We are continuing our ongoing construction program to enhance our tower
portfolios. In 1999, we constructed over 900 towers. In 2000, we plan to
construct approximately 1,170 towers, at an estimated aggregate cost of
approximately $270 million, for lease to wireless carriers such as Bell Atlantic
Mobile, BellSouth, GTE Wireless and Nextel. The actual number of towers built
may be outside that range depending on acquisition opportunities and potential
build-to-suit contracts from large wireless carriers.

GROWTH STRATEGY

   Our objective is to become the premier global owner and operator of tower and
transmission networks for wireless communications and broadcast companies. We
believe our experience in expanding and marketing our tower clusters, as well as
our experience in owning and operating analog and digital transmission networks,
positions us to accomplish this objective. The key elements of our business
strategy are to:

   .    MAXIMIZE UTILIZATION OF OUR TOWER CAPACITY. We are seeking to take
        advantage of the substantial operating leverage of our site rental
        business by increasing the number of antenna leases on our owned and
        managed communications sites. Many of our towers have significant
        capacity available for additional antenna space rental and that
        increased utilization of our tower capacity can be achieved at low
        incremental cost. We believe there is substantial demand for such
        capacity from existing carriers and broadcasters and new carriers and
        broadcasters. We believe that the extra capacity on our tower portfolios
        will be highly desirable to new entrants into the wireless
        communications industry. Such carriers are able to launch service
        quickly and relatively inexpensively by designing the deployment of
        their networks based on our attractive existing tower portfolios.
        Further, we intend to continue to selectively build and acquire
        additional towers to improve the coverage of our existing tower
        portfolios to further increase their attractiveness. We intend to
        continue to use targeted sales and marketing techniques to increase
        utilization of and investment return on our existing, newly constructed
        and acquired towers.

   .    UTILIZE THE EXPERTISE OF OUR U.S. AND U.K. PERSONNEL TO CAPTURE GLOBAL
        GROWTH OPPORTUNITIES. We are seeking to leverage the skills of our
        personnel in the United States and the United Kingdom. We believe that
        our ability to manage networks, including the transmission of signals,
        will be an important competitive advantage in our pursuit of global
        growth opportunities, as evidenced by our transactions with the BBC,
        One2One, Bell Atlantic Mobile, BellSouth, GTE and Powertel and our
        agreement to acquire and operate the tower network of Cable & Wireless
        Optus in Australia. With our wireless communications and broadcast
        transmission network design and radio frequency engineering expertise,
        we are well positioned to (1) partner with major wireless carriers to
        assume ownership of their existing towers; (2) provide build-to-suit
        towers for wireless carriers and broadcasters; (3) acquire existing
        broadcast transmission networks that are being privatized around the
        world (4) manage and operate wireless networks; and (5) deploy new
        wireless technologies.

                                       2
<PAGE>

   .    PARTNER WITH WIRELESS CARRIERS TO ASSUME OWNERSHIP OF THEIR EXISTING
        TOWERS. In addition to the joint ventures with Bell Atlantic Mobile and
        GTE Wireless and the BellSouth and BellSouth DCS transactions, we are
        continuing to seek to partner with other major wireless carriers to
        assume ownership of their existing towers directly or through joint
        ventures or control their towers through contractual arrangements. We
        believe the primary criteria of such carriers in selecting a company to
        own and operate their wireless communications infrastructure is the
        company's perceived capability to maintain the integrity of their
        networks, including their transmission signals. Therefore, we believe
        that those companies with a proven track record of providing end-to-end
        services will be best positioned to successfully acquire access to such
        wireless communications infrastructure. We believe that similar
        opportunities will arise globally as the wireless communications
        industry further expands, as evidenced by our agreement to acquire and
        operate the tower network of with Cable & Wireless Optus in Australia
        and the turnkey deployment of One2One's wireless network in Northern
        Ireland.

   .    BUILD NEW TOWERS FOR WIRELESS CARRIERS AND BROADCASTERS. As wireless
        carriers continue to expand and fill-in their service areas and deploy
        new technologies, they will require additional communications sites and
        will have to build new towers where multi-tenant towers are not
        available. We are pursuing these build-to-suit opportunities to build
        new towers for wireless carriers, leveraging on our ability to offer a
        wide range of related services.

   .    ACQUIRE EXISTING BROADCAST TRANSMISSION NETWORKS. In 1997, Crown Castle
        UK Limited successfully acquired the privatized domestic broadcast
        transmission network of the BBC. In addition, we are implementing the
        roll-out of digital television transmission services throughout the
        United Kingdom. As a result of this experience, we are well positioned
        to acquire other state-owned analog and digital broadcast transmission
        networks globally when opportunities arise. These state-owned broadcast
        transmission networks typically enjoy premier sites giving an acquirer
        the ability to offer unused antenna capacity to new and existing radio
        and television broadcasters and wireless carriers, as well as to install
        new technologies such as digital terrestrial transmission services. In
        addition, our experience in broadcast transmission services allows us to
        consider, when attractive opportunities arise, acquiring wireless
        transmission networks as well as associated wireless communications
        infrastructure. We are currently pursuing certain international
        acquisition and privatization opportunities.

   .    CONTINUE TO DECENTRALIZE OUR MANAGEMENT FUNCTIONS. In order to better
        manage our tower lease-up efforts and build-out programs, and in
        anticipation of the continued growth of our tower footprint throughout
        the United States, we have begun and plan to continue decentralizing
        some management and operational functions. To that end, in addition to
        our Pittsburgh operating headquarters and regional office, we have
        opened and staffed 17 regional offices, including Boston, Washington
        D.C., Philadelphia, Atlanta, Birmingham, Boca Raton, Charlotte, Houston,
        Louisville, Phoenix, Albany and Puerto Rico. The principal
        responsibilities of these offices are to manage the leasing of tower
        space on a regional basis through a dedicated local sales force, to
        maintain the towers already located in the region and to implement our
        build-to-suit commitments in the area. We believe that by moving a
        significant amount of our operating personnel to regional offices we
        will be better able to strengthen our relationship with regional
        carriers, serve our customers more effectively and identify additional
        build-to-suit opportunities with local and regional carriers.


THE COMPANY

   We operate our business through our subsidiaries. Crown Communication, Crown
Castle South, Crown Castle PT and the Bell Atlantic and GTE Wireless joint
ventures are our principal U.S. operating subsidiaries and Crown Castle UK
Limited is our principal U.K. operating subsidiary. Crown Castle Australia, a
joint venture between us and an investment group lead by Fay, Richwhite
Communications

                                       3
<PAGE>

Ltd. is anticipated to be our principal operating subsidiary in Australia.  We
also use subsidiaries to hold the assets we acquire or control as a result of
various transactions we may engage in from time to time.

 U.S. OPERATIONS

   Overview

   Our primary business focus in the United States is the leasing of antenna
space on multiple tenant towers to a variety of wireless carriers under long-
term lease contracts. Supporting our competitive position in the site rental
business, we maintain in-house expertise in, and offer our customers,
infrastructure and network support services that include network design and site
selection, site acquisition, site development and construction and antenna
installation.

   We lease antenna space to our customers on our owned, leased and managed
towers. We generally receive fees for installing customers' equipment and
antennas on a tower and also receive monthly rental payments from customers
payable under site rental leases that generally range in length from three to
five years. Our U.S. customers include such companies as AT&T Wireless, Aerial
Communications, AirTouch Cellular, Arch Communications, Bell Atlantic Mobile,
BellSouth Mobility, BellSouth DCS Cellular One, Federal Express, Lucent
Technologies, Motorola, Nextel, Nokia, PageNet, Powertel, Skytel, Sprint PCS,
Metricom, GTE Wireless and TSR Wireless. We also provide tower space to private
network operators and various federal and local government agencies, such as the
FBI, the IRS and the U.S. Postal Service.

   At December 31, 1999, we owned or managed 5,319 towers and 98 rooftop sites
in the United States and Puerto Rico.  These towers and rooftop sites are
located predominantly in the eastern, midwestern and southwestern United States,
along with Puerto Rico. We have recently acquired and will acquire a substantial
number of towers through our recent and agreed to transactions. See "--Recent
and Agreed to Transactions."

   The joint venture with Bell Atlantic controls and operates 1,531 towers as of
December 31, 1999. These towers represent substantially all the towers in Bell
Atlantic's 850 MHz wireless network in the eastern and southwestern United
States and provide coverage of 11 of the top 50 U.S. metropolitan areas
including New York, Philadelphia, Boston, Washington, D.C. and Phoenix. A
substantial majority of these towers are over 100 feet tall and can accommodate
multiple tenants.

   After completion of the BellSouth transaction, we will control and operate
approximately 1,850 towers in the BellSouth tower portfolio. As of February 2,
2000, we had acquired control of 1,664 of these towers, and we expect to close
on the balance by June 30, 2000. These towers represent substantially all the
towers in BellSouth's 850 MHZ wireless network in the southeastern and
midwestern United States and provide coverage of 12 of the top 50 U.S.
metropolitan areas, including Miami, Atlanta, Tampa, Nashville and Indianapolis.
A substantial majority of these towers are over 100 feet tall and can
accommodate multiple tenants.

   Through the Powertel acquisition, we now control and operate 650 towers.
These towers represent substantially all of Powertel's owned towers in its 1.9
GHz wireless network in the southeastern and midwestern United States.
Approximately 90% of these towers are clustered in seven southeastern states
providing coverage of such metropolitan areas as Atlanta, Birmingham,
Jacksonville, Memphis and Louisville, and a number of major connecting highway
corridors in the southeast. These towers are complementary to BellSouth's 850
MHZ tower portfolio in the southeast and have minimal coverage overlap.
Substantially all of these towers are over 100 feet tall, were built within the
last three years and can accommodate multiple tenants.

   After completion of the BellSouth DCS transaction, we will control and
operate approximately 773 communications towers out of the BellSouth DCS
portfolio located in North Carolina, South Carolina, east Tennessee and parts of
Georgia. As of February 2, 2000, we had acquired control of 674 of these towers,
and we expect to close on the balance by June 30, 2000. These towers represent
substantially all of the towers in BellSouth DCS's 1.9

                                       4
<PAGE>

GHz wireless network. The towers are complementary to the towers we have
acquired or are in the process of acquiring through the BellSouth transaction
and the Powertel acquisition. Substantially all of these towers are over 100
feet tall and can accommodate multiple tenants.

   Upon completion of all of the anticipated closings for the GTE Wireless
transaction, the GTE joint venture will control and operate approximately 2,300
towers.  As of January 31, 2000, the GTE joint venture had acquired control of
637 of these towers.  We contemplate closing with respect to approximately 1,600
additional towers effective as of April 1, 2000.  These towers represent a
significant majority of the wireless communications towers of GTE Wireless.  See
"--Recent and Agreed to Transactions".

   We are seeking to enter into arrangements with other wireless carriers and
independent tower operators to acquire additional tower portfolios. However, we
believe that acquisitions from major carriers in the United States, such as the
Bell Atlantic Mobile, BellSouth, Powertel and GTE Wireless transactions, are
substantially complete.

   We also seek to capitalize on our network design expertise to construct new
towers.  We plan to continue to build towers in areas where carriers' signals
fail to transmit in their coverage area.  The areas, commonly known as "dead
zones," are attractive tower locations.  When population density and perceived
demand are such that we believe the economics of constructing such towers are
justified, we build towers that can accommodate multiple tenants.  The multiple
tenant design of these towers obviates the need for expensive and time consuming
modifications to upgrade undersized towers, saving critical capital and time for
carriers facing time-to-market constraints.  The towers are also designed to
easily add additional customers, and the equipment shelters are built to
accommodate another floor for new equipment and air conditioning units when
additional capacity is needed.  The tower site is zoned for multiple carriers at
the time the tower is constructed to allow new carriers to quickly utilize the
site.  In addition, the towers, equipment shelters and site compounds are
engineered to protect and maintain the structural integrity of the site.

   In connection with the Bell Atlantic joint venture and GTE joint venture,
each of those joint ventures entered into master build-to-suit agreements under
which the joint venture will build and own the next 500 towers to be built for
the wireless communications business of Bell Atlantic and GTE Wireless,
respectively, over a five-year period. In addition, following the building of
such 500 sites, the Bell Atlantic joint venture will have a right of first
refusal to construct the next 200 towers to be built for Bell Atlantic. The
number of towers built under the GTE build-to-suit agreement is reduced by the
number of certain towers built for Bell Atlantic and other carriers. Further, we
have entered into similar agreements with BellSouth, as part of the BellSouth
transaction, to construct at least 500 towers on behalf of BellSouth in the
region covered by that transaction over the next five years, and we have a
build-to-suit agreement with Powertel through 2000 as to a minimum of 40 towers.

   Site Rental

   In the United States, we rent antenna space on our owned and managed towers
and rooftops to a variety of carriers operating cellular, personal
communication services, specialized mobile radio, enhanced specialized mobile
radio, paging and other networks.

   Tower Site Rental.  We lease space to our customers on our owned and managed
towers. We generally receive fees for installing customers' equipment and
antennas on a tower and also receive monthly rental payments from customers
payable under site leases. In the United States, the majority of our outstanding
customer leases, and the new leases typically entered into by us, have original
terms of five years (with three or four optional renewal periods of five years
each) and provide for annual price increases based on the Consumer Price Index.
The lease agreements relating to network acquisitions generally have a base term
of 10 years, with multiple renewal options, each typically ranging from five to
ten years.

                                       5
<PAGE>

   We also provide a range of site maintenance services in order to support and
enhance our site rental business.  We believe that by offering services such as
antenna, base station and tower maintenance and security monitoring, we are able
to offer quality services to retain our existing customers and attract future
customers to our communication sites.  We were the first site management company
in the United States selected by a major wireless communications company to
exclusively manage its tower network and market the network to other carriers
for multi-tenant use of their towers.

   We have existing master lease agreements with most major wireless carriers,
including AT&T Wireless, Aerial Communications, Bell Atlantic Mobile, Nextel,
Metricom, GTE Wireless and Sprint PCS, which provide certain terms (including
economic terms) that govern new leases entered into by such parties during the
term of their master lease agreements. We believe that our strategic clusters of
towers will cause the master lease agreements to cover numerous towers as both
incumbent and insurgent carriers expand. These master lease agreements typically
have an initial lease term of ten years, with multiple renewal options, each
typically ranging from five to ten years.

   We have significant site rental opportunities in connection with our recent
transactions as a result of the fact that such transactions usually involve a
master lease agreement of some type with the transferring carrier and the
opportunity to lease additional space with other carriers. In connection with
each of the Bell Atlantic and GTE joint ventures, we entered into a global lease
under which Bell Atlantic and GTE Wireless lease antenna space on the towers
transferred to the joint ventures, as well as the towers built under the build-
to-suit agreement. In connection with the BellSouth and BellSouth DCS
transactions, we are paid a monthly site maintenance fee from BellSouth for its
use or maintenance of space on the towers we control. Further, in connection
with the Powertel acquisition, we entered into an agreement under which the
sellers rent space on the towers we acquired from them. In each of these
transactions, we are permitted to lease additional space on the towers to third
parties. See "--Recent and Agreed to Transactions".

   Rooftop Site Rental.  We are a leading rooftop site management company in the
United States.  Through our subsidiary, Spectrum, we develop new sources of
revenue for building owners by effectively managing all technical aspects of
rooftop telecommunications, including two-way radio systems, microwave
facilities, fiber optics, wireless cable, paging, rooftop infrastructure
services and optimization of equipment location.  We also handle billing and
collections and all calls and questions regarding the site, totally relieving
the building's management of this responsibility.  In addition to the technical
aspects of site management, we provide operational support for both wireless
carriers looking to build out their wireless networks, and building owners
seeking to out source their site rental activities.  We generally enter into
management agreements with building owners and receive a percentage of the
revenues generated from the tenant license agreements.

   Network Services
   We design, build and operate our own communication sites.  We have developed
an in-house expertise in certain value-added services that we offer to the
wireless communications and broadcasting industries.  Because we are a provider
of total systems with "end-to-end" design, construction and operating expertise,
we offer our customers the flexibility of choosing between the provision of a
full ready-to-operate network infrastructure or any of the component services
involved therein.  Such services include network design and site selection, site
acquisition, site development and construction and antenna installation.

                                       6
<PAGE>

   Network Design and Site Selection.  We have extensive experience in network
design and engineering and site selection.  While we maintain sophisticated
network design services primarily to support the location and construction of
our multiple tenant towers, we do from time to time provide network design and
site selection services to carriers and other customers on a consulting contract
basis. Our network design and site selection services provide our customers with
relevant information, including recommendations regarding location and height of
towers, appropriate types of antennas, transmission power and frequency
selection and related fixed network considerations. In 1999, we provided network
design services primarily for our own portfolios and also for certain customers,
including Triton Communications, Nextel, Aerial Communications, Bell Atlantic
and Sprint PCS. These customers were typically charged on a time and materials
basis.

   To capitalize on the growing concerns over tower proliferation, we have
developed a program through which we are attempting to form strategic alliances
with local governments to create a single communications network in their
communities. To date our efforts have focused on select locations in the eastern
United States, where we have formed alliances with three municipalities. These
alliances are intended to accommodate wireless carriers and local public safety,
emergency services and municipal services groups as part of an effort to
minimize tower proliferation. By promoting towers designed for multiple tenants,
these alliances will reduce the number of towers in communities while serving
the needs of wireless carriers and wireless customers.

   Site Acquisition.  In the United States, we are engaged in site acquisition
services for our own purposes and for third parties.  Based on data generated in
the network design and site selection process, a "search ring," generally of a
one-mile radius, is issued to the site acquisition department for verification
of possible land purchase or lease deals within the search ring.  Within each
search ring, Geographic Information Systems specialists select the most suitable
sites, based on demographics, traffic patterns and signal characteristics.  Once
a site is selected and the terms of an option to purchase or lease the site are
completed, a survey is prepared and the resulting site plan is created.  The
plan is then submitted to the local zoning/planning board for approval. If the
site is approved, our construction department takes over the process of
constructing the site.

   We have provided site acquisition services to numerous customers, including
AT&T Wireless, Aerial Communications, AirTouch Cellular, Bell Atlantic Mobile,
BellSouth, GTE, Nextel, Omnipoint, Pagemart, Sprint PCS and Teligent.  These
customers engage us for such site acquisition services on either a fixed price
contract or a time and materials basis.

   Site Development and Construction and Antenna Installation.  We have provided
site development and construction and antenna installation services to the U.S.
communications industry for over 18 years.  We have extensive experience in the
development and construction of tower sites and the installation of antenna,
microwave dishes and electrical and telecommunications lines.  Our site
development and construction services include clearing sites, laying foundations
and electrical and telecommunications lines, and constructing equipment shelters
and towers. We have designed and built and presently maintain tower sites for a
number of our wireless communications customers and a substantial part of our
own tower network. We can provide cost-effective and timely completion of
construction projects in part because our site development personnel are cross-
trained in all areas of site development, construction and antenna installation.
We generally set prices for each site development or construction service
separately. Customers are billed for these services on a fixed price or time and
materials basis and we may negotiate fees on individual sites or for groups of
sites. We have the capability, expertise and contractual arrangements to install
antenna systems for our paging, cellular, personal communications services,
specialized mobile radio, enhanced specialized mobile radio, microwave and
broadcasting customers. As this service is performed, we use our technical
expertise to ensure that there is no interference with other tenants. We
typically bill for our antenna installation services on a fixed price basis.

                                       7
<PAGE>

   Our construction management capabilities reflect our extensive experience in
the construction of networks and towers. For example, Crown Communication was
instrumental in launching networks for Sprint PCS, Nextel and Aerial
Communications in the Pittsburgh major trading area. In addition, Crown
Communication supplied these carriers with all project management and
engineering services which included antenna design and interference analyses.

   In 1999, we provided site development and construction and antenna
installation services to a majority of our new tower site tenants in the United
States, including AT&T Wireless, Bell Atlantic Mobile, Nextel and Sprint PCS.

   Broadcast Site Rental and Services
   We also provide site rental and related services to customers in the
broadcasting industry in the United States. The launch of digital terrestrial
television in the United States will require significant expansion and
modification of the existing broadcast infrastructure. Because of the
significant cost involved and expertise required in the construction or
modification of broadcast towers, and the large capital expenditures
broadcasters will incur in acquiring digital broadcast equipment, we believe
that the television broadcasting industry will seek to outsource significant
services relating to digital broadcasting and potentially tower ownership. We
believe that our experience in providing digital transmission services in the
United Kingdom will make us an attractive provider of certain digital broadcast
services to the major networks and their affiliates.

   Electronic news gathering systems benefit from the towers and services we
offer. The electronic news gathering trucks, often in the form of local
television station news vans with telescoping antennas on their roofs, send live
news transmission back to the studio from the scene of an important event.
Typically, these vans cannot transmit signals beyond about 25 miles. In
addition, if they are shielded from the television transmitter site, they cannot
make the connection even at close range. We have developed a repeater system for
such news gathering that can be used on many of our towers and which is
currently in use on towers located in western Pennsylvania. This system allows
the van to send a signal to one of our local towers where the signal is
retransmitted back to the television transmitter site. The retransmission of the
signal from our tower to the various television transmitter sites is done via a
microwave link. We charge the station for the electronic news gathering receiver
system at the top of our tower and also charge them for the microwave dish they
place on our tower. Our electronic news gathering customers are affiliates of
the NBC, ABC, CBS and Fox television networks.

   We also have employees with considerable direct construction experience and
market knowledge in the U.S. broadcasting industry, having worked with numerous
television networks around the United States, and a number of other local
broadcasting companies. We have installed master FM and television systems on
buildings across the country. We have supervised the construction and operation
of the largest master FM antenna facility in the United States along with the
antenna facilities on the John Hancock Building in Chicago and have engineered
and installed two 2,000 foot broadcast towers with master FM antennas.

   Significant Contracts
   We have many agreements with telecommunications providers in the United
States, including leases, site management contracts and independent contractor
agreements.  We currently have important contracts with, among others, Bell
Atlantic Mobile, BellSouth, Mobility, BellSouth DCS, GTE Wireless, Powertel and
Nextel.

                                       8
<PAGE>

   Customers
   In both our site rental and network services businesses, we work with a
number of customers in a variety of businesses including cellular, personal
communications services, enhanced specialized mobile radio, paging and
broadcasting.  We work primarily with large national carriers such as Bell
Atlantic Mobile, BellSouth, Sprint PCS, Nextel and AT&T Wireless.  For the year
ended December 31, 1999, no customer in the United States accounted for more
than 10.0% of our consolidated revenues.

<TABLE>
<CAPTION>
                     Industry                                      Selected Customers
                   ------------                                 -------------------------
<S>                                                  <C>
Cellular...........................................  AT&T Wireless, Bell Atlantic Mobile,
                                                     BellSouth, Mobility, GTE Wireless
Personal Communications Services...................  Sprint PCS, Western Wireless, Powertel,
                                                     BellSouth DCS
Broadcasting.......................................  Hearst Argyle Television, Trinity Broadcasting
Specialized Mobile Radio / Enhanced Specialized
 Mobile Radio......................................  Nextel, SMR Direct
Governmental Agencies..............................  FBI, INS, Puerto Rico Police
Private Industrial Users...........................  IBM, Phillips Petroleum
Data...............................................  Ardis, RAM Mobile Data
Paging.............................................  AirTouch, PageNet, TSR Wireless
Utilities..........................................  Equitable Resources, Nevada Power
Other..............................................  WinStar, Teligent
</TABLE>

   Sales and Marketing
   Our sales and marketing personnel, located in our regional offices, target
carriers expanding their networks, entering new markets, bringing new
technologies to market and requiring maintenance or add-on business. All types
of wireless carriers are targeted including broadcast, cellular, paging,
personal communications services, microwave and two-way radio. We are also
interested in attracting 9-1-1, federal, state, and local government agencies,
as well as utility and transportation companies to locate on existing sites. Our
objective is to pre-sell capacity on our towers by promoting sites prior to
construction. Rental space on existing towers is also aggressively marketed and
sold.

   We utilize numerous public and proprietary databases to develop detailed
target marketing programs directed at awardees of bandwidth licenses auctioned
by the government, existing tenants and specific market groups.  Mailings focus
on regional build outs, new sites and services.  The use of databases, such as
those with information regarding sites, demographic data, licenses and
deployment status, coupled with actual signal strength measurements taken in the
field and specialized computer programs that accurately predict the service area
of a particular radio signal from any given transmission point, allows our sales
and marketing personnel to target specific carriers' needs for specific sites.
To foster productive relationships with our major existing tenants and potential
tenants, we have formed a team of account relationship managers.  These managers
work to develop new tower construction, site leasing services and site
management opportunities, as well as ensure that customers' emerging needs are
translated into new site products and services.

   The marketing department maintains our visibility within the wireless
communications industry through regular advertising and public relations efforts
including sponsorship of a third generation wireless communication showcase,
actively participating in trade shows and generating regular press releases,
newsletters and targeted mailings (including promotional flyers).  Our
promotional activities range from advertisements and site listings in industry
publications to maintaining a presence at national trade shows. Potential
clients are referred to our Web site, which contains Company information as well
as site listings.  In addition, our sites are listed on the Cell Site Express
Web site.  This Web site enables potential tenants to locate existing structures
by latitude, longitude or address.  Clients can easily contact us via e-mail
through our Web site or Cell Site Express.  Our network services capabilities
are marketed in conjunction with our tower portfolios.

                                       9
<PAGE>

   To follow up on targeted mailings and to cold-call on potential clients, we
have established a telemarketing department.  Telemarketers field inbound and
outbound calls and forward leads to local sales representatives or relationship
managers for closure.  Local sales representatives are stationed in each cluster
to develop and foster close business relationships with decision-makers in each
customer organization.  Sales professionals work with marketing specialists to
develop sales presentations targeting specific client demands.

   In addition to a dedicated, full-time sales and marketing staff, a number of
senior managers spend a significant portion of their efforts on sales and
marketing activities.  These managers call on existing and prospective customers
and also seek greater visibility in the industry through speaking engagements
and articles in national publications.  Furthermore, many of these managers have
been recognized as industry experts, are regularly quoted in articles and are
called on to testify at local hearings and to draft local zoning ordinances.

   Public and community relations efforts include coordinating community events,
such as working with amateur radio clubs to supply emergency and disaster
recovery communications, charitable event sponsorship, and promoting charitable
donations through press releases.

   Competition
   In the United States, we compete with other independent tower owners, some of
which also provide site rental and network services; wireless carriers, which
own and operate their own tower networks; service companies that provide
engineering and site acquisition services; and other potential competitors, such
as utilities, outdoor advertisers and broadcasters, some of which have already
entered the tower industry.  Wireless carriers that own and operate their own
tower networks generally are substantially larger and have greater financial
resources than we have.  We believe that tower location, capacity, price,
quality of service and density within a geographic market historically have been
and will continue to be the most significant competitive factors affecting tower
rental companies.  We also compete for acquisition and new tower construction
opportunities with wireless carriers, site developers and other independent
tower operating companies.  We believe that competition for tower site
acquisitions will increase and that additional competitors will enter the tower
market, some of which may have greater financial resources than us.

   The following is a list of the larger independent tower companies that we
compete with in the United States: American Tower Corp., Pinnacle Towers,
SpectraSite and SBA Communications.

   The following companies are primarily competitors for our rooftop site
management activities in the United States: AAT Communications, American Tower
Corp., APEX Site Management, Commsite International, Pinnacle Towers, JJS
Leasing, Inc., Signal One, Subcarrier Communications and Tower Resources
Management.

   We believe that the majority of our competitors in the site acquisition
business operate within local market areas exclusively, while a small minority
of firms appear to offer their services nationally, including SBA Communications
Corporation, Whalen & Company and Gearon & Company (a subsidiary of American
Tower Corp.).  We offer our services nationwide and we believe we are currently
one of the largest providers of site development services to the U.S. and
international markets.  The market includes participants from a variety of
market segments offering individual, or combinations of, competing services.
The field of competitors includes site acquisition consultants, zoning
consultants, real estate firms, right-of-way consulting firms, construction
companies, tower owners/managers, radio frequency engineering consultants,
telecommunications equipment vendors (which provide turnkey site development
services through multiple subcontractors) and carriers' internal staff.  We
believe that carriers base their decisions on site development services on
certain criteria, including a company's experience, track record, local
reputation, price and time for completion of a project.  We believe that we
compete favorably in these areas.

                                       10
<PAGE>

 U.K. OPERATIONS

   Overview
   We own and operate, through our 80% interest in Crown Castle UK Limited
(formerly known as "Castle Transmission International Ltd."), one
of the world's most established television and radio transmission networks and
are expanding our leasing of antenna space on our towers to a variety of
wireless carriers. We provide transmission services for four of the six digital
terrestrial television services in the U.K., two BBC analogue television
services, six national BBC radio services (including the first digital audio
broadcast service in the United Kingdom), 37 local BBC radio stations and two
national commercial radio services through our network of transmitters, which
reach 99.4% of the U.K. population. These transmitters are located on
approximately 1,300 towers, more than half of which we own and the balance of
which are licensed to us under a site-sharing agreement with NTL, our principal
competitor in the United Kingdom. We have also secured long-term contracts to
provide digital television transmission services to the BBC and ONdigital. See
"--Significant Contracts." In addition to providing transmission services, we
also lease antenna space on our transmission infrastructure and over 770
communications towers in the United Kingdom to various communications service
providers, including One2One, Cellnet, Orange and Vodafone, and provide
telecommunications network installation and maintenance services and engineering
consulting services.

   Our core revenue generating activity in the United Kingdom is the analog and
digital terrestrial transmission of radio and television programs broadcast by
the BBC. Crown Castle UK Limited's business, which was formerly owned by the
BBC, was privatized under the Broadcasting Act 1996 and sold to Crown Castle UK
Limited in February 1997. At the time the BBC home service transmission business
was acquired, Crown Castle UK Limited entered into a 10-year transmission
contract with the BBC for the provision of terrestrial analog television and
analog and digital radio transmission services in the United Kingdom. The
digital contract was added in 1998 as described below. In the 12 months ended
December 31, 1999, approximately 50% of Crown Castle UK Limited's consolidated
revenues were derived from the provision of services to the BBC.

   At December 31, 1999, we owned, leased or licensed 1,942 transmission sites
(excluding rooftops) on which we operated 2,020 towers (excluding rooftops). In
addition, as of December 31, 1999, we were constructing two new towers on
existing sites and had approximately 12 site acquisition projects in process for
new tower sites. We have 51 revenue producing rooftop sites that are occupied by
our transmitters but are not available for leasing to our customers. Our sites
are located throughout England, Wales, Scotland and Northern Ireland.

   We expect to significantly expand our existing tower portfolios in the United
Kingdom by building and acquiring additional towers.  We believe our existing
tower network encompasses many of the most desirable tower locations in the
United Kingdom for wireless communications.  However, due to the shorter range
over which communications signals carry (especially newer technologies such as
personal communications networks) as compared to broadcast signals, wireless
communications providers require a denser portfolio of towers to cover a given
area.  Therefore, in order to increase the attractiveness of our tower
portfolios to wireless communications providers, we will seek to build or
acquire new communications towers.  Using our team of over 300 engineers with
state-of-the-art network design and radio frequency engineering expertise, we
locate sites and design towers that will be attractive to multiple tenants.  We
seek to leverage such expertise by entering into new tower construction
contracts with various carriers, such as British Telecom, Cable & Wireless
Communications, Cellnet, Dolphin, Energis, Highway One, One2One, Orange and
Scottish Telecom, thereby securing an anchor tenant for a site before incurring
capital expenditures for the site build-out. As of December 31, 1999, we were
building 14 towers that we will own. In addition, we expect to make some
strategic acquisitions of existing communications sites.

   On March 31, 1999, Crown Castle UK Limited completed the One2One transaction,
under which Crown Castle UK Limited will manage, develop and, at its option,
acquire 821 towers.  These towers represent substantially all the towers in
One2One's nationwide 900 MHz wireless network in the United Kingdom.  These
towers will allow Crown Castle UK Limited to market a nationwide network of
towers to third generation

                                       11
<PAGE>

wireless carriers in the United Kingdom following the completion of the pending
auction of such licenses by the U.K. government.

   We believe that we generally have significant capacity on our towers in the
United Kingdom.  Although approximately 206 of our towers are poles with
limited capacity, we typically will be able to build new towers that will
support multiple tenants on these sites (subject to the applicable planning
process).  We intend to upgrade these limited capacity sites where we believe we
can achieve appropriate returns to merit the necessary capital expenditure.
Approximately 60 of our sites are used for medium frequency broadcast
transmissions. At this frequency, the entire tower is used as the transmitting
antenna and is therefore electrically "live."  Such towers are therefore
unsuitable for supporting other tenant's communications equipment.  However,
medium frequency sites generally have substantial ground area available for the
construction of new multiple tenant towers.

   Transmission Business
   Analog.  For the 12 months ended December 31, 1999, Crown Castle UK Limited
generated approximately 42% of its revenues from the provision of analog
broadcast transmission services to the BBC.  Under the BBC analog transmission
contract, we provide terrestrial transmission services for the BBC's analog
television and radio programs and certain other related services (including BBC
digital radio) for an initial 10-year term through March 31, 2007.  See
"--Significant Contracts." For the 12 months ended December 31, 1999, the BBC
Analog Transmission Contract generated revenues of approximately (Pounds)50.8
million ($82.1 million) for us.

   In addition to the BBC analog transmission contract, we have separate
contracts to provide maintenance and transmission services for two national
radio stations, Virgin Radio and Talk Radio. The Virgin Radio contract is for a
period of eight years commencing on March 31, 1993. The Talk Radio Contract
commenced on February 4, 1995 and expires on December 31, 2008.

   We own all of the transmission equipment used for broadcasting the BBC's
domestic radio and television programs, whether located on one of Crown Castle
UK Limited's sites or on an NTL or other third-party site. As of December 31,
1999, Crown Castle UK Limited had 3,777 transmitters, of which 2,497 were for
television broadcasting and 1,280 were for radio.

   A few of our most powerful television transmitters together cover the
majority of the U.K. population.  The coverage achieved by the less powerful
transmitters is relatively low, but is important to the BBC's ambition of
attaining universal coverage in the United Kingdom.  This is illustrated by the
following analysis of the population coverage of our analog television
transmitters:

<TABLE>
<CAPTION>

                                    Combined
           Number of Sites         Population
        (ranked by coverage)        Coverage
       -----------------------     -----------

       <S>                       <C>
        1 (Crystal Palace)...........   21.0%
        top 16.......................   79.0
        top 26.......................   86.0
        top 51.......................   92.0
        all..........................   99.4
</TABLE>

   All of our U.K. transmitters are capable of unmanned operation and are
maintained by mobile maintenance teams from 27 bases located across the United
Kingdom.  Access to the sites is strictly controlled for operational and
security reasons, and buildings at 140 of the sites are protected by security
alarms connected to Crown Castle UK Limited's Technical Operations Centre at
Warwick.  The Site-Sharing Agreement provides us with reciprocal access rights
to NTL's broadcast transmission sites on which we have equipment.

   Certain of our transmitters that serve large populations or important
geographic areas have been designated as priority transmitters.  These
transmitters have duplicated equipment so that a single failure will not result
in

                                       12
<PAGE>

total loss of service but will merely result in an output-power reduction
that does not significantly degrade the service to most viewers and listeners.

   Digital. In 2000, we have completed contracts with the holders (including the
BBC) of four of the six DTT multiplexes allocated by the U.K. government to
design, build and operate their digital transmission networks. In connection
with the implementation of digital terrestrial television, new transmission
infrastructure was required. The multiplexes required 81 transmission sites to
be upgraded with new transmitters and associated systems to support digital
terrestrial television and provide digital coverage to approximately 93% of the
U.K. population. Of these new transmitters and associated systems, 49 are owned
by us and the remainder are on NTL towers pursuant to a site sharing
arrangement. Our costs to add the new transmitters and associated systems was
approximately (Pounds) 100.0 million ($170.0 million).

   We successfully began commercial operation of the digital terrestrial
television networks from an initial 22 transmission sites on November 15, 1998.
This launch marks the first stage of the project to introduce the digital
broadcast system that will eventually replace conventional analog television
services in the United Kingdom. We have accepted an invitation from the U.K.
television regulator, the Independent Television Commission, to play a major
role in planning further digital terrestrial television network extensions to be
built in the year 2000 and beyond.

   We currently provide transmission services for digital radio broadcasts in
the United Kingdom. In September 1995, the BBC launched, over our transmission
network, its initial bandwidth scheme for transmission equipment with the
ability to compensate for varying data rates by automatically adjusting the
amount of frequency band used, and this service is now broadcast to
approximately 60% of the U.K. population. A license for an independent national
digital radio network was awarded to the Digital One consortium during 1998. We
are in negotiations to provide accommodation and access to masts (towers) and
antennas at 24 transmission sites to Digital One. In addition, local digital
radio licenses were awarded during 1999. We believe we are well positioned to
become the transmission service provider to the winners of such licenses.

   Site Rental
   The BBC transmission network provides a valuable initial portfolio for the
creation of wireless communications networks. As of December 31, 1999,
approximately 200 companies rented antenna space on approximately 1,665 of Crown
Castle UK Limited's 2,071 towers and rooftops. These site rental agreements have
normally been for three to 12 years and are generally subject to rent reviews
every three years. Site sharing customers are generally charged annually in
advance, according to rate cards that are based on the antenna size and position
on the tower. Our largest site rental customer in the United Kingdom is NTL
under the Site-Sharing Agreement and the digital broadcasting site sharing
agreement. This agreement generated approximately (Pounds) 9.1 million ($14.7
million) of site rental revenue for the year ended December 31, 1999.

   As in the United States, we provide a range of site maintenance services in
the United Kingdom in order to support and enhance our site rental business.  We
complement our U.K. transmission experience with our site management experience
in the United States to provide customers with a top-of-the-line package of
service and technical support.

   Other than NTL, Crown Castle UK Limited's largest (by revenue) site rental
customers consist mainly of wireless carriers such as Cellnet, One2One, Orange
and Vodafone.  Revenues from these non-BBC sources are expected to become an
increasing portion of Crown Castle UK Limited's total U.K. revenue base, as the
acquired BBC home service transmission business is no longer constrained by
governmental restrictions on the

                                       13
<PAGE>

BBC's commercial activities. We believe that the demand for site rental from
communication service providers will increase in line with the expected growth
of these communication services along with the deployment of new technologies
such as third generation mobile communications, or 3G, in the United Kingdom.

   We have master lease agreements with all of the major U.K. telecommunications
site users including British Telecom, Cable & Wireless Communications, Cellnet,
Dolphin, Energis, Highway One, One2One, Orange, Scottish Telecom and Vodafone
AirTouch.  These agreements typically specify the terms and conditions
(including pricing and volume discount plans) under which these customers have
access to all sites within our U.K. portfolio.  Customers make orders for
specific sites using the standard terms included in the master lease agreements.
As of December 31, 1999, there were approximately 911 applications in process
for installations at existing sites under such agreements.

   Network Services
   Crown Castle UK Limited provides broadcast and telecommunications engineering
services to various customers in the United Kingdom. We retained substantially
all of the BBC home service transmission business employees when we acquired
Crown Castle UK Limited. Accordingly, we have engineering and technical staff of
the caliber and experience necessary not only to meet the requirements of our
current customer base, but also to meet the challenges of developing digital
technology. Within the United Kingdom, Crown Castle UK Limited has worked with
several telecommunications operations on design and build projects as they roll-
out their networks. Crown Castle UK Limited has had success in bidding for
broadcast consulting contracts, including, over the last four years, in
Thailand, Taiwan, Poland and Sri Lanka. With the expertise of our engineers and
technical staff, we are a provider of complete systems to the wireless
communications and broadcast industries.

   Network Design and Site Selection.  We have extensive experience in network
design and engineering and site selection.  Our U.K. customers, therefore, also
receive the benefit of our sophisticated network design and site selection
services.

   Site Acquisition.  As in the United States, in the United Kingdom we are
involved in site acquisition services for our own purposes and for third
parties.  We recognize that the site acquisition phase often carries the highest
risk for a project.  To ensure the greatest possible likelihood of success and
timely acquisition, we combine a desktop survey of potential barriers to
development with a physical site search with relevant analyses, assessments and,
where necessary, surveys.  We seek to take advantage of our experience in site
acquisition and co-location when meeting with local planning authorities.

   Site Development and Antenna Installation.  We use a combination of external
and internal resources for site construction.  Our engineers are experienced in
both construction techniques and construction management, ensuring an efficient
and simple construction phase.  Selected civil contractors are managed by Crown
Castle UK Limited staff for the ground works phase.  Specialist erection
companies, with whom we have a long association, are used for tower
installation.  Final antenna installation is undertaken by our own experienced
teams.

   Site Management and Other Services. We provide complete site management,
preventive maintenance, fault repair and system management services to the
Scottish Ambulance Service. We also maintain a mobile radio system for the
Greater Manchester Police and provide maintenance and repair services for
transmission equipment and site infrastructure.

   Significant Contracts

   Crown Castle UK Limited's principal analog broadcast transmission contract is
the BBC analog transmission contract.  Crown Castle UK Limited also has entered
into two digital television transmission contracts, the BBC digital transmission
contract and the ONdigital digital transmission contract.  Under the site-
sharing agreement, Crown Castle UK Limited also gives NTL access to facilities
to provide broadcast transmission to non-Crown Castle UK Limited customers.
Crown Castle UK Limited also has long-term service agreements with broadcast
customers such as Virgin Radio and Talk Radio.  In addition, Crown Castle UK

                                       14
<PAGE>

Limited has several agreements with telecommunication providers, including
leases, site management contracts and independent contractor agreements.  Crown
Castle UK Limited has entered into contracts to design and build infrastructure
for customers such as Cellnet, One2One, Orange, Scottish Telecom and Vodafone
AirTouch, including the turnkey network contract for One2One in Northern
Ireland.

   BBC Analog Transmission Contract.  Crown Castle UK Limited entered into a
10-year transmission contract with the BBC for the provision of terrestrial
analog television and analog and digital radio transmission services in the
United Kingdom at the time the BBC home service transmission business was
acquired. The BBC analog transmission contract provides for charges of
approximately (Pounds)46.5 million ($77.3 million) to be payable by the BBC to
Crown Castle UK Limited for the year ended March 31, 1998 and each year
thereafter through the termination date, adjusted annually at the inflation rate
less 1%. In addition, for the duration of the contract an annual payment of
(Pounds)300,000 ($498,840) is payable by the BBC for additional broadcast-
related services. At the BBC's request, since October 1997, the number of
television broadcast hours has been increased to 24 hours per day for the BBC's
two national television services, which has added over (Pounds)500,000
($831,400) annually to the payments made by the BBC to us. On July 16, 1999, the
BBC and Crown Castle UK Limited amended the transmission contract to allow Crown
Castle UK Limited to provide certain liaison services to the BBC.

   The BBC analog transmission contract also provides for Crown Castle UK
Limited to be liable to the BBC for "service credits" (i.e., rebates of its
charges) in the event that certain standards of service are not attained as a
result of what the contract characterizes as "accountable faults" or the failure
to meet certain "response times" in relation to making repairs at certain key
sites.  We believe that Crown Castle UK Limited is well-equipped to meet the
BBC's service requirements by reason of the collective experience its existing
management gained while working with the BBC. Following completion of formal
six-month performance reviews, Crown Castle UK Limited achieved a 100% "clean
sheet" performance, incurring no service credit penalties.

   The initial term of the BBC Analog Transmission Contract ends on March 31,
2007.  Thereafter, the BBC Analog Transmission Contract may be terminated with
12 months' prior notice by either of the parties, expiring on March 31 in any
contract year, from and including March 31, 2007.  It may also be terminated
earlier:

   (1) by mutual agreement between Crown Castle UK Limited and the BBC,

   (2) by one party upon the bankruptcy or insolvency of the other party within
       the meaning of section 123 of the Insolvency Act 1986,

   (3) upon certain force majeure events with respect to the contract as a whole
       or with respect to any site (in which case the termination will relate to
       that site only),

   (4) by the non-defaulting party upon a material breach by the other party;
       and

   (5) upon the occurrence of certain change of control events (as defined in
       the BBC Analog Transmission Contract).

   BBC Commitment Agreement.  On February 28, 1997, in connection with the
acquisition of the BBC home service transmission business, the Company, TdF,
TeleDiffusion de France S.A., which is the parent company of TdF and DFI, and
the BBC entered into the BBC commitment agreement, whereby we and TdF agreed
(1) not to dispose of any shares in Crown Castle UK Holdings Limited (formerly
known as "Castle Transmission Services (Holdings) Limited") or any interest in
such shares, or enter into any agreement to do so, until February 28, 2000; and
(2) to maintain various minimum indirect ownership interests in Crown Castle UK
Limited and Crown Castle UK Holdings Limited for periods ranging from three to
five years commencing February 28, 1997. These provisions restrict our ability
and the ability of TdF to sell, transfer or otherwise dispose of their
respective Crown Castle UK Holdings Limited shares, and, indirectly, their Crown
Castle UK Limited shares. The restrictions do not apply to disposals of which
the BBC has been notified in advance and to which the BBC has given its prior
written consent, which, subject to certain exceptions, consent shall not be
unreasonably withheld or delayed. On July 17, 1999, in return

                                       15
<PAGE>

for the provision of liaison services by Crown Castle UK Limited to the BBC
described above, the BBC consented to the recent amendment to the TdF
agreements.

   The BBC commitment agreement also required TdF's parent and us to enter into
a services agreements with Crown Castle UK Limited. The original services
agreement entered into by TdF's parent and Crown Castle UK Limited on February
28, 1997, under which TdF makes available certain technical consultants,
executives and engineers to Crown Castle UK Limited, was amended on August 21,
1998 to extend the original minimum term of services provided from three years
to seven years, commencing February 28, 1997, thereafter terminable on 12-
months' prior notice given by Crown Castle UK Limited to TdF after February 28,
2003.

   Further, the Department of Trade and Industry in the United Kingdom, or DTI,
in December 1999 recommended to the Office of Fair Trading that as a condition
to not referring a proposed 25% equity investment in NTL by TdF's parent (France
Telecom) to the Competition Commission, TdF should be required to undertake to
dispose of its investment in Crown Castle UK Holdings Limited and us. The
publicly-announced purpose of the investment by France Telecom in NTL is to
finance NTL's acquisition of Cable and Wireless Communications, which
acquisition was recently approved by the Competition Commission. A draft of the
recommended undertakings was published on March 29, 2000 and essentially
requires TdF to (1) sell all of its interest in us (including Crown Castle UK
Holdings Limited) within four months following the date on which the UK
Secretary of State announced the UK Competition Commission's approval of NTL's
acquisition of the cable business of Cable and Wireless Communications (March
23, 2000, unless a later date is approved by the UK Director General), and (2)
relinquish certain significant governance rights with respect to us. The comment
period deadline for the published, recommended undertakings is April 12, 2000.
We cannot predict what undertakings, if any, will ultimately be executed by TdF,
when TdF might undertake such undertakings or what effect such undertakings
might have on us. See "--Risk Factors--Our Agreements with TdF Give TdF
Substantial Governance and Economic Rights."

   ONdigital Digital Transmission Contract.  In 1997, the Independent Television
Commission awarded ONdigital three of the five available commercial digital
terrestrial television "multiplexes" for new program services.  We bid for and
won the 12 year contract from ONdigital to build and operate its digital
television transmission network.  The contract provides for approximately
(Pounds)20.0 million ($34.0 million) of revenue per year from 2001 to 2008, with
lesser amounts payable before and after these years and with service credits
repayable for performance below agreed thresholds.

   BBC Digital Transmission Contract.  In 1998, we bid for and won the 12-year
contract from the BBC to build and operate its digital terrestrial television
transmission network.  The BBC has committed to the full digital terrestrial
television roll-out contemplated by the contract providing for approximately
(Pounds)10.5 million ($17.8 million) of revenue per year during the 12 year
period, with service credits repayable for performance below agreed thresholds.
There is a termination provision during the three-month period following the
fifth anniversary of our commencement of digital terrestrial transmission
services for the BBC exercisable by the BBC but only if the BBC's Board of
Governors determines, in its sole discretion, that digital television in the
United Kingdom does not have sufficient viewership to justify continued digital
television broadcasts.  Under this provision, the BBC will pay us a termination
fee in cash that substantially recovers our capital investment in the network,
and any residual ongoing operating costs and liabilities.  Like the BBC analog
transmission contract, the contract is terminable upon the occurrence of certain
change of control events.

   BT Digital Distribution Contract.  Under the BBC digital transmission
contract and the ONdigital digital transmission contract, in addition to
providing digital terrestrial transmission services, Crown Castle UK Limited has
agreed to provide for the distribution of the BBC's and ONdigital's broadcast
signals from their respective television studios to Crown Castle UK Limited's
transmission network.  Consequently, in May 1998, Crown Castle UK Limited
entered into a 12 year distribution contract with British Telecommunications plc
(with provisions for extending the term), in which British Telecom has agreed to
provide fully duplicated, fiber-based, digital distribution services, with
penalties for late delivery and service credits for failure to deliver 99.99%
availability.

   Site-Sharing Agreement.  In order to optimize service coverage and enable
viewers to receive all analog UHF television services using one receiving
antenna, the BBC, as the predecessor to Crown Castle UK Limited, and NTL made
arrangements to share all UHF television sites.  This arrangement was introduced
in the 1960s when UHF television broadcasting began in the United Kingdom.  In
addition to service coverage advantages, the arrangement also minimizes costs
and avoids the difficulties of obtaining additional sites.

   On September 10, 1991, the BBC and NTL entered into the site sharing
agreement which set out the commercial site sharing terms under which the
parties were entitled to share each others' sites for any television and radio
services.

   Under the Site-Sharing Agreement, the party that is the owner, lessee or
licensee of each site is defined as the "Station Owner."  The other party, the
"Sharer", is entitled to request a license to use certain facilities at that
site.  The Site-Sharing Agreement and each site license provide for the Station
Owner to be paid a commercial license fee in accordance with the Site-Sharing
Agreement ratecard and for the Sharer to be responsible, in

                                       16
<PAGE>

normal circumstances, for the costs of accommodation and equipment used
exclusively by it. The Site-Sharing Agreement may be terminated with five years'
prior notice by either of the parties and expires on December 31, 2005 or on any
tenth anniversary of that date. It may also be terminated:

   (1) following a material breach by either party which, if remediable, is not
       remedied within 30 days of notice of such breach by the non-breaching
       party,

   (2) on the bankruptcy or insolvency of either party, and

   (3) if either party ceases to carry on a broadcast transmission business or
       function.

   Similar site sharing agreements have been entered into between NTL and us for
the build-out of digital transmission sites and equipment, including a new rate
card related to site sharing fees for new digital facilities and revised
operating and maintenance procedures related to digital equipment.

   Vodafone AirTouch.  On April 16, 1998, under Vodafone AirTouch's master lease
agreement with us, Vodafone AirTouch agreed to locate antennas on 122 of our
existing communication sites in the United Kingdom. The first 96 sites had been
completed by the end of December 1999. This included 39 sites at which a new
tower had been constructed to replace an existing structure of limited capacity.
The remaining sites are expected to be completed by the end of July 2000 and
will include the construction of a further 29 replacement towers. After their
upgrade, these sites will be able to accommodate additional tenants.

   One2One Northern Ireland Network.  On December 29, 1999, Crown Castle UK
Limited and One2One entered into an agreement under which Crown Castle UK
Limited will establish a turnkey mobile network for One2One in Northern Ireland.
The majority of the network is expected to be completed by mid 2000. Crown
Castle UK Limited will provide all cell planning, acquisition, design, build,
operation and maintenance services related to the network. The agreement with
One2One is for an initial term of eleven years. We currently own and operate
approximately 100 tower sites in Northern Ireland, and we expect that One2One
will be a tenant on substantially all of these sites as part of the network.

   Third Generation Technology
   The United Kingdom is currently auctioning four licenses relating to third
generation ("3G") mobile communications, the license with the largest amount of
spectrum reserved for an insurgent carrier.

   In anticipation of the deployment of the 3G auctions in the United Kingdom,
Crown Castle UK Limited has prepared models for the deployment and operation of
3G networks in the United Kingdom. We contemplate working with the successful
bidders for 3G licenses in order to provide the outsourcing of network operation
and management and site sharing of network towers, equipment and other
communications infrastructure, such as base stations, as a solution to many of
the commercial and technical challenges and costs which such 3G license holders
will face. There can be no assurances that we will be successful in marketing
our asset and services to winners of the 3G auctions in the United Kingdom.

   Customers
   For the 12 months ended December 31, 1999, the BBC accounted for
approximately 50% of Crown Castle UK Limited's consolidated revenues.  This
percentage has decreased from 58.9% for the 12 months ended December 31, 1998
and is expected to continue to decline as Crown Castle UK Limited continues to
expand its site rental business.  Crown Castle UK Limited provides all four U.K.
personal communications network/cellular operators (Cellnet, One2One, Orange and
Vodafone AirTouch) with infrastructure services and also provides fixed
telecommunications operators, such as British Telecom, Cable & Wireless
Communications, Energis and Scottish Telecom, with microwave links and backhaul
infrastructure. The following is a list of some of Crown Castle UK Limited's
leading site rental customers by industry segment.

                                       17
<PAGE>

<TABLE>
<CAPTION>
             Industry                           Selected Customers
         ----------------                   -------------------------
<S>                                  <C>
Broadcasting........................ BBC, NTL, Virgin Radio, Talk Radio,
                                      XFM, ONdigital
PMR/TETRA........................... National Band 3, Dolphin
Personal Communications Network..... Orange, One2One
Data................................ RAM Mobile Data, Cognito
Paging.............................. Hutchinson, Page One
Governmental Agencies............... Ministry of Defense
Cellular............................ Vodafone AirTouch, Cellnet
Public Telecommunications........... British Telecom, Cable & Wireless
                                      Communications
Other............................... Aerial Sites, Health Authorities
Utilities........................... Welsh Water, Southern Electric
</TABLE>

   Sales and Marketing
   We have about 20 sales and marketing personnel in the United Kingdom who
identify new revenue-generating opportunities, develop and maintain key account
relationships, and tailor service offerings to meet the needs of specific
customers. An excellent relationship has been maintained with the BBC, and
successful new relationships have been developed with many of the major
broadcast and wireless communications carriers in the United Kingdom. We have
begun to actively cross-sell our products and services so that, for example,
site rental customers are also offered build-to-suit services.

   Competition
   NTL is Crown Castle UK Limited's primary competition in the terrestrial
broadcast transmission market in the United Kingdom.  NTL provides analog
transmission services to ITV, Channels 4 and 5, and S4C Digital Networks.  It
also has been awarded the transmission contract for the new digital terrestrial
television multiplex service from Digital 3 & 4 Limited, and a similar contract
for the digital terrestrial television service for S4C.

   Although Crown Castle UK Limited and NTL are direct competitors, they have
reciprocal rights to the use of each others' sites for broadcast transmission
usage in order to enable each of them to achieve the necessary country-wide
coverage.  This relationship is formalized by the Site-Sharing Agreement entered
into in 1991, the time at which NTL was privatized.

   NTL also offers site rental on approximately 1,000 of its sites, some of
which are managed on behalf of third parties.  Like Crown Castle UK Limited, NTL
offers a full range of site-related services to its customers, including
installation and maintenance.  Crown Castle UK Limited believes its towers to be
at least as well situated as NTL's and that it will be able to expand its own
third-party site-sharing penetration.

   All four U.K. mobile operators own site infrastructure and lease space to
other users.  Their openness to sharing with direct competitors varies by
operator.  Cellnet and Vodafone have agreed to cut site costs by jointly
developing and acquiring sites in the Scottish Highlands.  British Telecom and
Cable & Wireless Communications are both major site sharing customers but also
compete by leasing their own sites to third parties.  British Telecom's position
in the market is even larger when considered in combination with its interest in
Cellnet.

                                       18
<PAGE>

   Several other companies compete in the market for site rental.  These include
British Gas, Racal Network Systems, Aerial Sites Plc, Relcom Aerial Services and
the Royal Automobile Club.  Some companies own sites initially developed for
their own networks, while others are developing sites specifically to exploit
this market.

   Crown Castle UK Limited faces competition from a large number of companies in
the provision of network services.  The companies include NTL, specialty
consultants and equipment manufacturers such as Nortel and Ericsson.

 AUSTRALIA OPERATIONS

   In March 2000, we entered into an agreement with Cable & Wireless Optus
pursuant to which Cable & Wireless Optus will sell to Crown Castle Australia
approximately 705 wireless communications towers located in Australia for
approximately $135 million in cash.  In addition, Cable & Wireless Optus has
agreed to lease space on each of such towers for an initial term of 15 years.
The agreement also provides us with an exclusive right to develop all future
tower sites for Cable & Wireless Optus in Australia over the next six years.
Crown Castle Australia is two-thirds owned by us and one-third owned by an
investor group lead by Fay, Richwhite Communications Ltd., a New Zealand-based
investment firm.

   The Cable & Wireless Optus transaction is expected to close in the second
quarter of 2000. Following the completion of the transaction, Crown Castle
Australia will be the largest independent tower operator in Australia. Upon
completion of the transaction, Crown Castle Australia will own and operate a
nationwide tower portfolio covering over 90 percent of the population in
Australia. See "--Recent and Agreed to Transactions--Cable & Wireless Optus
Transaction." There can be no assurances that the transaction with Cable &
Wireless Optus will be completed or that we will be successful in transacting
operations in Australia.

EMPLOYEES

   At March 1, 2000, we employed approximately 1,250 people worldwide.  Other
than in the United Kingdom, we are not a party to any collective bargaining
agreements.  In the United Kingdom, we are party to a collective bargaining
agreement with the Broadcast, Entertainment, Cinematographic and Technicians
Union. This agreement establishes bargaining procedures relating to the terms
and conditions of employment for all of Crown Castle UK Limited's non-management
staff.  We have not experienced any strikes or work stoppages, and management
believes that our employee relations are satisfactory.

REGULATORY MATTERS

 UNITED STATES

   Federal Regulations

   Both the FCC and FAA regulate towers used for wireless communications
transmitters and receivers.  Such regulations control the siting and marking of
towers and may, depending on the characteristics of particular towers, require
registration of tower facilities.  Wireless communications devices operating on
towers are separately regulated and independently licensed based upon the
particular frequency used.

   The FCC, in conjunction with the FAA, has developed standards to consider
proposals for new or modified antenna structures.  These standards mandate that
the FCC and the FAA consider the height of proposed antenna structures, the
relationship of the structure to existing natural or man-made obstructions and
the proximity of the antenna structures to runways and airports.  Proposals to
construct or to modify existing antenna structures above certain heights are
reviewed by the FAA to ensure the structure will not present a hazard to
aviation.  The FAA may condition its issuance of a determination that the
structure will not present a hazard to aviation upon compliance with specified
lighting and/or marking requirements.  The FCC will not license the operation of

                                       19
<PAGE>

wireless telecommunications devices on towers unless the tower is in compliance
with the FAA's rules and is registered with the FCC, if necessary.  The FCC will
not register a tower unless it has been cleared by the FAA. The FCC may also
enforce special lighting and painting requirements.  Owners of wireless
transmissions towers may have an obligation to maintain painting and lighting to
conform to FAA and FCC standards.  Tower owners may also bear the responsibility
of notifying the FAA of any tower lighting outage.  The Company generally
indemnifies its customers against any failure to comply with applicable
regulatory standards.  Failure to comply with the applicable requirements may
lead to civil penalties.

   The 1996 Telecom Act limits certain state and local zoning authorities'
jurisdiction over the construction, modification and placement of towers.  The
law prohibits any action that would (1) discriminate between different providers
of personal wireless services or (2) prohibit or have the effect of prohibiting
the provision of personal wireless service.  Finally, the 1996 Telecom Act
requires the federal government to help licensees for wireless communications
services gain access to preferred sites for their facilities.  This may require
that federal agencies and departments work directly with licensees to make
federal property available for tower facilities.

   Local Regulations
   Local regulations include:

   .    city and other local ordinances;

   .    zoning restrictions; and

   .    restrictive covenants imposed by community developers.

These regulations vary greatly, but typically require tower owners to obtain
approval from local officials or community standards organizations prior to
tower construction.  Local zoning authorities generally have been hostile to
construction of new transmission towers in their communities because of the
height and visibility of the towers.

   Licenses Under the Communications Act of 1934
   We hold, through certain of our subsidiaries, licenses for radio transmission
facilities granted by the FCC, including licenses for common carrier microwave
and commercial mobile radio services, including specialized mobile radio and
paging facilities, as well as private mobile radio services including
industrial/business radio facilities, which are subject to additional regulation
by the FCC.  We are required to obtain the FCC's approval prior to the transfer
of control of any of our FCC licenses.

   We, as the parent company of the licensees of common carrier and commercial
mobile radio services facilities, are also subject to Section 310(b)(4) of the
Communications Act of 1934, as amended, which would limit us to a maximum of 25%
foreign ownership absent a ruling from the FCC that foreign ownership in excess
of 25% is in the public interest.  In light of the World Trade Organization
Agreement on Basic Telecommunications Services, which took effect on February 5,
1998, the FCC has determined that such investments are generally in the public
interest if made by individuals and entities from WTO-member nations. We are
over 25% foreign owned by companies headquartered in France, the United Kingdom
and New Zealand. Each of these nations is a signatory to the WTO agreement.  The
FCC has granted approval of up to 49.9% foreign ownership of us, at least 25% of
which will be from WTO-member nations.

 UNITED KINGDOM

   Telecommunications systems and equipment used for the transmission of signals
over radio frequencies have to be licensed in the United Kingdom.  These
licenses are issued on behalf of the British Government by the Secretary of
State for Trade and Industry under the Telecommunications Act 1984 and the
Wireless Telegraphy Acts 1949, 1968 and 1998.  Crown Castle UK Limited has a
number of such licenses under which it runs the telecommunications distribution
and transmission systems which are necessary for the provision of

                                       20
<PAGE>

its transmission services. Crown Castle UK Limited's operations are subject to
comprehensive regulation under the laws of the United Kingdom.

   Licenses under the Telecommunications Act 1984
   Crown Castle UK Limited has the following three licenses under the
Telecommunications Act 1984:

   Transmission License.  The Transmission License is a renewable license to run
telecommunications systems for the transmission via wireless telegraphy, a type
of data transmissions technique, of broadcasting services.  This license is for
a period of at least 25 years from January 23, 1997, and is Crown Castle UK
Limited's principal license.  Its main provisions include:

   (1) a price control condition covering the provision of all analog radio and
       television transmission services to the BBC under the BBC analog
       transmission agreement, establishing an initial price at approximately
       (Pounds)44 million for regulated elements of the services provided by
       Crown Castle UK Limited under the BBC analog transmission agreement in
       the year ended March 31, 1997, with an increase cap which is 1% below the
       rate of increase in the Retail Price Index over the previous calendar
       year. The current price control condition applies until March 31, 2006,

   (2) a change of control provision which requires notification of acquisitions
       of interest in Crown Castle UK Limited of more than 20% by a public
       telecommunications operator or any Channel 3 or Channel 5 licensee, which
       acquisitions entitle the Secretary of State to revoke the license,

   (3) a site sharing requirement requiring Crown Castle UK Limited to provide
       space on its towers to analog and digital broadcast transmission
       operators and including a power for the Director General of
       Telecommunications ("OFTEL"), as the regulator, to determine prices if
       there is failure between the site owner and the prospective site sharer
       to agree to a price,

   (4) a fair trading provision enabling OFTEL to act against anti-competitive
       behavior by the licensee, and

   (5) a prohibition on undue preference or discrimination in the provision of
       the services it is required to provide third parties under the
       transmission license.

   On August 11, 1998, OFTEL determined that it had jurisdiction to make a
determination with respect to a complaint made by Classic FM and NTL in respect
of certain charges, imposed previously by the BBC under the Site-Sharing
Agreement with NTL for the use by Classic FM of BBC radio antennas and passed on
to Classic FM by NTL. OFTEL's position as of March 1999 is that the Site-Sharing
Agreement did not cover charges for new services to customers such as Classic
FM, thereby enabling OFTEL to intervene and determine the appropriate rate under
the "applicable rate" mechanism in Crown Castle UK Limited's transmission
license. This procedure could result in the fees NTL pays to Crown Castle UK
Limited for site sharing facilities for Classic FM, currently calculated under
the site-sharing agreement, being determined at a reduced rate and otherwise not
being covered by the terms of any existing contract which could lead to a
diminution of Crown Castle UK Limited's income of approximately (Pounds)300,000
per annum, or approximately 0.4% of revenues and 1.0% of EBITDA for the fiscal
year ended March 31, 1997. Crown Castle UK Limited has challenged OFTEL's right
to make a determination and on April 28, 1999, Crown Castle UK Limited was given
leave by the High Court to apply for a judicial review of that determination.
Meanwhile, Crown Castle UK Limited is also seeking to negotiate a settlement
with Classic FM and NTL and has made a provision of approximately (Pounds)2.9
million relating to any rate adjustment imposed by OFTEL with respect to
previous charges for Classic FM under the Site-Sharing Agreement.

   Crown Castle UK Limited is discussing with OFTEL certain amendments to Crown
Castle UK Limited's Telecommunications Act Transmission License to ensure that
the price control condition accommodates the provision by Crown Castle UK
Limited of additional contractually agreed upon services to the BBC in return
for additional agreed upon payments.  See "--Risk Factors--Extensive Regulations
Which Could Change at Any Time and Which We Could Fail to Comply With Regulate
Our Business."

   The Secretary of State has designated the transmission license a public
telecommunications operator license in order to reserve to himself certain
emergency powers for the protection of national security.  This designation is,
however, limited to this objective.  Crown Castle UK Limited does not have a
full domestic

                                       21
<PAGE>

public telecommunications license and does not require one for its current
activities. The Department of Trade and Industry has, nevertheless, indicated
that it would be willing to issue Crown Castle UK Limited such a license. As a
result, Crown Castle UK Limited would gain wider powers to provide services to
non-license holding third parties including public switched voice telephony and
satellite uplink and would grant Crown Castle UK Limited powers to build out its
network over public property (so-called "code powers").

   General Telecom License.  The general telecom license is a general license to
run telecommunications systems and authorizes Crown Castle UK Limited to run all
the necessary telecommunications systems to convey messages to its transmitter
sites (e.g., via leased circuits or using its own microwave links).  The license
does not cover the provision of public switched telephony networks (which would
require a public telecommunications license as described above).

   Satellite License.  The satellite license is a license to run
telecommunications systems for the provision of satellite telecommunication
services and allows the conveyance via satellite of messages, including data and
radio broadcasting.  The license excludes television broadcasting direct to the
home via satellite although distribution via satellite of television
broadcasting services which are to be transmitted terrestrially is permitted.

   Licenses under the Wireless Telegraphy Acts 1949, 1968 and 1998

   Crown Castle UK Limited has a number of licenses under the Wireless
Telegraphy Acts 1949, 1968 and 1998, authorizing the use of radio equipment for
the provision of certain services over allocated radio frequencies including:

   (1) a broadcasting services license in relation to the transmission services
       provided to the BBC, Virgin Radio and Talk Radio,

   (2) a fixed point-to-point radio links license;

   (3) two bandwidth test and development licenses, and

   (4) digital terrestrial television test and development licenses.

   All the existing licenses under the Wireless Telegraphy Acts 1949, 1968 and
1998 have to be renewed annually with the payment of a significant fee.  The
BBC, Virgin Radio and Talk Radio have each contracted to pay their portion of
these fees.  ONdigital is obligated under the ONdigital digital transmission
contract to pay most of their portion of these fees.

ENVIRONMENTAL MATTERS

   Our operations are subject to foreign, federal, state and local laws and
regulations relating to the management, use, storage, disposal, emission, and
remediation of, and exposure to, hazardous and nonhazardous substances,
materials and wastes.  As an owner and operator of real property, we are subject
to certain environmental laws that impose strict, joint and several liability
for the cleanup of on-site or off-site contamination relating to existing or
historical operations, and also could be subject to personal injury or property
damage claims relating to such contamination.  We are potentially subject to
cleanup liabilities in both the United States and the United Kingdom and
environmental exposure will extend to Australia once we commence operations
there.

   We are also subject to regulations and guidelines that impose a variety of
operational requirements relating to radio frequency emissions.  The potential
connection between radio frequency emissions and certain negative health
effects, including some forms of cancer, has been the subject of substantial
study by the scientific community in recent years.  To date, the results of
these studies have been inconclusive.  Although we have not been subject to any
claims relating to radio frequency emissions, we have established operating
procedures designed to reduce employee exposures to radio frequency emissions
and are continually evaluating certain of our towers and transmission equipment
in the United States and the United Kingdom to determine whether radio frequency
emission reductions are economically possible and feasible.

                                       22
<PAGE>

   In addition, we are subject to licensing, registration and related
requirements concerning tower siting, construction and operation.  In the United
States, the FCC's decision to license a proposed tower may be subject to
environmental review pursuant to the National Environmental Policy Act of 1969,
which requires federal agencies to evaluate the environmental impacts of their
decisions under certain circumstances.  The FCC regulations implementing the Act
place responsibility on each applicant to investigate any potential
environmental effects of a proposed operation and to disclose any significant
effects on the environment in an environmental assessment prior to commencing
construction.  In the event the FCC determines that a proposed tower would have
a significant environmental impact, the FCC would be required to prepare an
environmental impact statement.  This process could significantly delay or
prevent the registration or construction of a particular tower, or make tower
construction more costly.  In certain jurisdictions, local laws or regulations
may impose similar requirements.

   We believe that we are in substantial compliance with all applicable
environmental laws.  Nevertheless, there can be no assurance that the costs of
compliance with existing or future environmental laws will not have a material
adverse effect on our business, results of operations, or financial condition.

RECENT AND AGREED TO TRANSACTIONS

   We have recently completed or entered into agreements for the transactions
described below. Completion of these transactions has and will continue to
result in a significant increase in the size of our operations and the number of
towers that we own and manage plus our need for capital. The agreements
governing the transactions that have not yet been closed or that are closing
over a series of closings include a number of important conditions agreed to.
Therefore, we cannot guarantee that we will consummate any of the agreed to
transactions on the terms currently contemplated or at all. The descriptions of
the terms of these transactions set forth below are summaries and are qualified
in their entirety by reference to the complete text of the relevant agreements.

   Bell Atlantic Joint Venture
   On March 31, 1999, we completed the formation of a joint venture with Bell
Atlantic Mobile to own and operate approximately 1,458 towers.  These towers
represent substantially all the towers in Bell Atlantic's wireless network in
the eastern and southwestern United States, including markets such as New York,
Philadelphia, Boston, Washington, D.C. and Phoenix.  The joint venture will also
build and own the next 500 towers to be built for Bell Atlantic's wireless
communications business.  In addition, upon completion of such 500 towers, the
Bell Atlantic joint venture will have a right of first refusal to construct the
next 200 towers for Bell Atlantic.  Bell Atlantic leases antenna space on the
1,458 towers transferred to the joint venture and will lease antenna space on
the towers that the joint venture builds for Bell Atlantic.

   BellSouth Transaction
   On June 1, 1999, we entered into an agreement with BellSouth to control and
operate, through a sublease, approximately 1,850 towers. These towers represent
substantially all the towers in BellSouth's wireless network in the southeastern
and midwestern United States, including markets such as Miami, Atlanta, Tampa,
Nashville and Indianapolis. We will be responsible for managing and leasing the
available space on BellSouth's towers. We will have the right to build, control
and operate the next 500 towers to be built for BellSouth's wireless
communications business. BellSouth will pay a management fee for its retained
antenna space on the towers effectively equivalent to lease payments, as well
as on the towers we build for BellSouth. The BellSouth transaction will close in
a series of closings which commenced on June 1, 1999 and is expected to be
substantially completed by June 30, 2000. As of February 2, 2000, we had
subleased and acquired control of 1,664 of these towers.

   Powertel Acquisition
   In 1999, we completed the purchase of 620 towers from Powertel.
These towers represent substantially all of Powertel's owned towers in its
wireless network in the southeastern and midwestern United States, including
such markets as Atlanta, Birmingham, Jacksonville, Memphis and Louisville, and a
number of major connecting highway corridors in the southeast.  These towers are
complementary to BellSouth's towers

                                       23
<PAGE>

in the southeast and have minimal coverage overlap. We subsequently acquired in
2000, 30 additional towers from Powertel which were incomplete at the time of
the initial closing. Powertel leases antenna space on the 650 towers we acquired
from them. We also have a build-to-suit agreement through 2000 as to a minimum
of 40 towers.

   One2One Transaction
   On March 31, 1999, Crown Castle UK Limited acquired the rights to manage,
develop and, at its option, acquire up to 821 towers.  These towers represent
substantially all the towers in One2One's nationwide wireless network in the
United Kingdom.  We are responsible for managing and leasing available space on
the towers and receive all the income from any such third party leases.

   BellSouth DCS Transaction
   On July 23, 1999, we entered into an agreement with BellSouth DCS to control
and operate, through a sublease, approximately 773 personal communications
towers from BellSouth DCS.  The towers are located in North Carolina, South
Carolina, east Tennessee and parts of Georgia. The terms of the BellSouth DCS
transaction are substantially the same as the BellSouth transaction described
above. The towers are complementary to the towers we have acquired or are in the
process of acquiring through the BellSouth transaction, the Powertel acquisition
and the GTE Wireless joint venture. BellSouth DCS will effectively lease space
from us on the towers we acquire from them through a management arrangement and
fee. As of February 2, 2000, we had closed on 674 of these towers.

   GE Capital Transaction
   On November 19, 1999, GE Capital Structured Finance Group, or SFG, made a
$200,000,000 strategic investment in us in exchange for 200,000 shares of our 8
1/4% manditorily redeemable, convertible preferred stock and warrants to
purchase 1,000,000 shares of our common stock.  The warrants have an exercise
price of $26.875 per share and are exercisable, in whole or in part, at any time
for a period of five years following the issue date.  The net proceeds of this
investment will be used to pay a portion of the purchase price for the GTE
transaction described below.

   One2One Northern Ireland Network
   On December 29, 1999, Crown Castle UK Limited and One2One entered into an
agreement pursuant to which Crown Castle UK Limited will establish a turnkey
mobile network for One2One in Northern Ireland. The majority of the network is
expected to be completed by mid 2000.  We will provide all cell planning,
acquisition, design, build, operation and maintenance services related to the
network. The agreement with One2One is for an initial term of eleven years. We
currently own and operate approximately 100 tower sites in Northern Ireland, and
we expect that One2One will be a tenant on substantially all of these sites as
part of the network.

   GTE Transaction
   On November 7, 1999 we entered into a formation agreement with GTE Wireless
Incorporated and certain affiliates of GTE Wireless to form a joint venture to
own and operate a significant majority of the wireless communications
towers of GTE Wireless. We will own up to an 88.65% equity interest in
the joint venture, and the day-to-day operations of the joint venture will be
managed by us.

   The transaction will be completed in multiple closings, each of which is
subject to a number of conditions which could prevent it from occurring. At each
closing, in exchange for interests in the joint venture, GTE Wireless will
contribute to the joint venture towers and liabilities relating thereto, and we
will contribute consideration proportionate to the number of towers being
transferred. It is currently contemplated that up to 2,322 towers will be
transferred. If all such towers are transferred, we will be required to
contribute up to approximately $825.0 million (of which up to $100.0 million can
be in shares of our common stock valued at $18.655 per share) to the joint
venture. Of this amount, $25 million will be retained by the joint venture for
working capital, and the balance will be distributed to GTE Wireless. In
addition, the joint venture may borrow up to $200 million of indebtedness,
subject to certain limitations, which borrowing will reduce our contribution
requirement. The proceeds of any such borrowing will be distributed to GTE
Wireless. The initial closing took



                                      24
<PAGE>

place on January 31, 2000 at which time we contributed $223.9 million in cash to
the joint venture, and GTE Wireless contributed 637 towers in exchange for a
cash distribution of $198.9 million from the joint venture. We anticipate
closing with respect to approximately 1,600 additional towers effective as of
April 1, 2000. In connection with the transaction, we deposited $50 million into
an escrow account; such funds would be forfeited to GTE Wireless in the event
that any closing does not occur as a result of our inability to obtain adequate
financing. We contemplate that the April 1, 2000 closing will involve all cash
(including the $50 million in escrow) being contributed to the joint venture.

   In connection with the formation of the joint venture, GTE Wireless and the
joint venture entered into a master build-to-suit agreement, pursuant to which,
subject to certain conditions, the next 500 towers to be built for GTE Wireless
will be constructed and owned by the joint venture.  The 500 tower amount will
be reduced for certain towers built for third parties, including towers built
for Bell Atlantic in excess of 500 towers. In addition, the parties
entered into a global lease, under which GTE Wireless will lease space on
all of the towers acquired by the joint venture from GTE Wireless and all towers
constructed under the build-to-suit agreement.  The average monthly rent
on the 2,322 towers contributed to the joint venture by GTE Wireless will be
approximately $1,400, subject to certain adjustments, including a 4% per year
increase for the initial 10-year period.  For all sites, the initial lease term
is 10 years, with an option for four additional five-year terms at the election
of GTE Wireless.

   Upon a dissolution of the joint venture we will receive all the assets and
liabilities of the joint venture, other than any shares of our common stock held
by the joint venture, which would be distributed to GTE Wireless.  GTE Wireless
will transfer its equity interests in the joint venture to us, and we will pay
to GTE Wireless the fair market value of such interests.  A dissolution may be
triggered (1) by GTE Wireless at any time following the third anniversary of the
formation of the joint venture and (2) by us at any time following the fourth
anniversary of its formation.

   We also entered into a letter agreement dated November 7, 1999 with GTE
Wireless, whereby GTE Wireless has the right to contribute additional towers on
terms substantially similar to the formation agreement. These additional towers
may be (1) currently owned towers not contributed pursuant to the formation
agreement, (2) towers subsequently acquired in cellular or personal
communications services markets east of the Mississippi, or (3) towers acquired
by GTE Wireless recently from Ameritech Corp.  Conversely, the joint venture
also has the right to require the Ameritech towers to be contributed by GTE
Wireless to the joint venture in a manner that is substantively identical to GTE
Wireless' right to contribute the Ameritech towers described above.
Consideration paid for these additional towers will be in the form of cash and
additional ownership interests for GTE Wireless in the joint venture.  The
Ameritech towers are limited to 600 towers, and the towers which GTE Wireless
currently owns or subsequently acquires are limited to 100 towers in any twelve
month period.  The rights with respect to the Ameritech towers must be exercised
no later than May 1.  The letter agreement terminates, with respect to the
towers which GTE Wireless currently owns or subsequently acquires, 18 months
after the final closing under the formation agreement.  All of these towers are
subject to the global lease.

   Cable & Wireless Optus Transaction
   On March 9, 2000, Crown Castle Australia entered into an agreement with Cable
& Wireless Optus. Pursuant to the agreement, Cable & Wireless Optus will sell to
Crown Castle Australia approximately 705 wireless communications towers located
in Australia for approximately $135 million (A$220 million) in cash. The
agreement also provides Crown Castle Australia with an exclusive right to
develop all future tower sites for Cable & Wireless Optus over the next six
years. In addition, Cable & Wireless Optus has entered into a tower access
agreement, under which Cable & Wireless Optus has agreed to lease space on the
705 towers for an initial term of 15 years. Crown Castle Australia is two-thirds
owned by us and one-third owned by an investment group lead by Fay, Richwhite
Communications Ltd., a New Zealand-based investment firm. The transaction is
expected to close in the second quarter of 2000. Following the completion of the
transaction, Crown Castle Australia will be the largest independent tower
operator in Australia.

                                       25
<PAGE>

   2000 Credit Facility
   In March 2000, a subsidiary of ours entered into a credit agreement with a
syndicate of banks which consists of two term loan facilities and a revolving
line of credit aggregating $1.2 billion (the "2000 Credit Facility"). Available
borrowings under the 2000 Credit Facility are generally to be used for the
construction and purchase of towers and for the general corporate purposes of
certain of our subsidiaries along with the discharge of the then existing credit
facility of such subsidiaries. The amount of available borrowings will generally
be determined based upon the then current financial performance of the assets of
those subsidiaries. Up to $25 million of borrowing availability under the 2000
Credit Facility can be used for letters of credit. On March 15, 2000, we used
$83.4 million in borrowings under the 2000 Credit Facility to repay outstanding
borrowings and accrued interest under our senior credit facility to such
subsidiaries. Additional proceeds of approximately $317 million in borrowings
will be promptly used to fund a portion of the purchase price of the GTE
Wireless transaction and for general corporate purposes.

RISK FACTORS

   You should carefully consider the risks described below, as well as the other
information contained in this document, when evaluating your investment in our
securities.


 FAILURE TO PROPERLY MANAGE OUR GROWTH

   If we are unable to successfully integrate acquired operations or to manage
our existing operations as we grow, our business will be adversely affected and
we may not be able to continue our current business strategy.

   We cannot guarantee that we will be able to successfully integrate acquired
businesses and assets into our business or implement our plans without delay. If
we fail to do so it could have a material adverse effect on our financial
condition and results of operations. We have grown significantly over the past
two years through acquisitions, and such growth continues to be an important
part of our business plan. The addition of over 8,500 towers to our operations
through our recent and agreed to transactions has increased and will continue to
increase our current business considerably and adds operating complexities.
Successful integration of these transactions will depend primarily on our
ability to manage these combined operations and to integrate new management and
employees with and into our existing operations.

   Implementation of our acquisition strategy may impose significant strains on
our management, operating systems and financial resources.  We regularly
evaluate potential acquisition and joint venture opportunities and are currently
evaluating potential transactions that could involve substantial expenditures,
possibly in the near term.  If we fail to manage our growth or encounter
unexpected difficulties during expansion, it could have a material adverse
effect on our financial condition and results of operations.  The pursuit and
integration of acquisitions and joint venture opportunities will require
substantial attention from our senior management, which will limit the amount of
time they are able to devote to our existing operations.

 WE MAY NOT COMPLETE THE AGREED TO TRANSACTIONS

   If we fail to complete any or all of the agreed to transactions described in
this document, we may incur liquidated damages and will not recognize all of
the benefits of such transactions.

   If one or more of the agreed to transactions we describe in this document is
not completed or is completed on significantly different terms than those
currently contemplated, it could substantially affect the implementation of our
business strategy.  If we fail to close these transactions, our ability to offer
tower clusters in major U.S. markets will be impaired.  As a result, our future
site rental revenue would be adversely affected. We cannot guarantee that we
will complete any or all of these agreed to transactions.  The agreements
relating to these agreed to transactions contain many conditions that must be
satisfied before we can close such agreed to transactions.

                                       26
<PAGE>

   In addition, we cannot assure you that the transactions, if and when
completed, will be done so on the terms currently contemplated.  For example,
each of the agreements relating to these agreed to transactions includes
provisions that could result in our purchasing fewer towers at closing.

   Our initial transaction with GTE Wireless is closing in a series of closings.
If any closing does not occur as a result of our inability to obtain adequate
financing, GTE wireless may retain a $50.0 million liquidated damages payment
which we have deposited into escrow.

 SUBSTANTIAL LEVEL OF INDEBTEDNESS

   Our substantial level of indebtedness could adversely affect our ability to
react to changes in our business. We may also be limited in our ability to use
debt to fund future capital needs.

   We have a substantial amount of indebtedness.  The following chart sets forth
certain important credit information and is presented as of December 31, 1999.

<TABLE>
<S>                                                      <C>
                                                           (Dollars in
                                                            thousands)
Total indebtedness........................................ $1,542,345
Redeemable preferred stock................................    422,923
Stockholders' equity......................................  1,617,747
Debt and redeemable preferred stock to equity ratio.......      1.21x
</TABLE>

   In addition, our earnings for the twelve months ended December 31, 1999 were
insufficient to cover fixed charges by $91.3 million.

   Given our substantial indebtedness, we could be affected in the following
ways:

   .    we could be more vulnerable to general adverse economic and industry
        conditions;

   .    we may find it more difficult to obtain additional financing to fund
        future working capital, capital expenditures and other general corporate
        requirements;

   .    we will be required to dedicate a substantial portion of our cash flow
        from operations to the payment of principal and interest on our debt,
        reducing the available cash flow to fund other projects;

   .    we may have limited flexibility in planning for, or reacting to, changes
        in our business and in the industry; and

   .    we will have a competitive disadvantage relative to other companies with
        less debt in our industry.


   We cannot guarantee that we will be able to generate enough cash flow from
operations or that we will be able to obtain enough capital to service our debt
or fund our planned capital expenditures.  In addition, we may need to refinance
some or all of our indebtedness on or before maturity.  We cannot guarantee,
however, that we will be able to refinance our indebtedness on commercially
reasonable terms or at all.

 AS A HOLDING COMPANY, WE REQUIRE DIVIDENDS FROM SUBSIDIARIES TO MEET CASH
 REQUIREMENTS OR PAY DIVIDENDS

   If our subsidiaries are unable to dividend cash to us when we need it, we may
be unable to pay dividends or satisfy our obligations, including interest and
principal payments, under our debt instruments.

                                       27
<PAGE>

   Crown Castle International Corp., or CCIC, is a holding company with no
business operations of its own. CCIC's only significant asset is the outstanding
capital stock of its subsidiaries. CCIC conducts all its business operations
through its subsidiaries. Accordingly, CCIC's only source of cash to pay
dividends or make other distributions on its capital stock or to pay interest
and principal on its outstanding indebtedness is distributions relating to its
ownership interest in its subsidiaries from the net earnings and cash flow
generated by such subsidiaries. We currently expect that the earnings and cash
flow of CCIC's subsidiaries will be retained and used by such subsidiaries in
their operations, including to service their respective debt obligations. Even
if we did determine to make a distribution in respect of the capital stock of
CCIC's subsidiaries, there can be no assurance that CCIC's subsidiaries will
generate sufficient cash flow to pay or distribute such a dividend or funds, or
that applicable state law and contractual restrictions, including negative
covenants contained in the debt instruments of such subsidiaries, would permit
such dividends, distributions or payments. Furthermore, the terms of our U.S.
and U.K. credit facilities place restrictions on our principal subsidiaries'
ability to pay dividends or to make distributions, and in any event, such
dividends or distributions may only be paid if no default has occurred under the
applicable instrument. Moreover, CCIC's subsidiaries are permitted under the
terms of their existing debt instruments to incur additional indebtedness that
may restrict or prohibit the making of distributions, the payment of dividends
or the making of loans by such subsidiaries to CCIC. See "--Substantial Level of
Indebtedness" and "--Ability to Service Debt".

 ABILITY TO SERVICE DEBT

   To service our indebtedness, we will require a significant amount of cash
from our subsidiaries.  An inability to access our subsidiaries' cash flow may
lead to an acceleration of our indebtedness, including our notes.  Currently,
the instruments governing our subsidiaries' indebtedness do not allow sufficient
funds to be distributed to CCIC to service its indebtedness.

   If CCIC is unable to refinance its subsidiary debt or renegotiate the terms
of such debt, CCIC may not be able to meet its debt service requirements,
including interest payments on our notes, in the future. Our 9% senior notes and
our 9 1/2% senior notes will require annual cash interest payments of
approximately $16.2 million and $11.9 million, respectively. Prior to November
15, 2002, May 15, 2004 and August 1, 2004, the interest expense on our 10 5/8%
discount notes, our 10 3/8% discount notes and our 11 1/4% discount notes,
respectively, will be comprised solely of the amortization of original issue
discount. Thereafter, the 10 5/8% discount notes, the 10 3/8% discount notes and
the 11 1/4% discount notes will require annual cash interest payments of
approximately $26.7 million, $51.9 million and $29.3 million, respectively.
Prior to December 15, 2003, we do not expect to pay cash dividends on our
exchangeable preferred stock or, if issued, cash interest on the exchange
debentures. Thereafter, assuming all dividends or interest have been paid-in-
kind, our exchangeable preferred stock or, if issued, the exchange debentures
will require annual cash dividend or interest payments of approximately $47.8
million.

 RESTRICTIVE DEBT COVENANTS

   The terms of our debt instruments impose significant restrictions on our
ability to take a number of actions that our management might otherwise believe
to be in your best interests. In addition, if we fail to comply with our
covenants, our debt could be accelerated.

   Currently we have debt instruments in place that restrict our ability to
incur more indebtedness, pay dividends, create liens, sell assets and engage in
certain mergers and acquisitions. Our subsidiaries, under their debt
instruments, are also required to maintain specific financial ratios. Our
ability to comply with the restrictions of these instruments and to satisfy our
debt obligations will depend on our future operating performance. If we fail to
comply with the debt restrictions, we will be in default under those
instruments, which in some cases would cause the maturity of substantially all
of our long-term indebtedness to be accelerated.

                                       28
<PAGE>

 OUR AGREEMENTS WITH TDF GIVE TDF SUBSTANTIAL GOVERNANCE AND ECONOMIC RIGHTS

   The exercise of these rights by TdF could have a material adverse effect on
our business.

   We have entered into agreements with TeleDiffusion de France International
S.A., or TdF, an affiliate of France Telecom, that give TdF substantial rights.
The agreements were entered into in order to induce TdF to participate in the
roll-up of our U.K. business, the transaction in which we exchanged shares of
our common stock for shares of Crown Castle UK Holdings Limited common stock,
held by Crown Castle UK Holdings Limited stockholders and, as a result,
increased our ownership in Crown Castle UK Holdings Limited to 80%. The TdF
agreements give TdF significant rights relating to the governance of CCIC and
our U.K. business. Our U.K. business currently accounts for a substantial
majority of our revenues. TdF retains significant governance rights even if we
acquire the remaining 20% interest of our U.K. business held by TdF.

   Further, the Department of Trade and Industry in the United Kingdom, or DTI,
in December 1999 recommended to the Office of Fair Trading that as a
condition to not referring a proposed 25% equity investment in NTL by TdF's
parent (France Telecom) to the Competition Commission, TdF should be required to
undertake to dispose of its investment in Crown Castle UK Holdings Limited and
us. The publicly-announced purpose of the investment by France Telecom in NTL is
to finance NTL's acquisition of Cable and Wireless Communications which
acquisition was recently approved by the Competition Commission. A draft of the
recommended undertakings was published on March 29, 2000 and essentially
requires TdF to (1) sell all of its interest in us (including Crown Castle UK
Holdings Limited) within four months following the date on which the UK
Secretary of State announced the UK Competition Commission's approval of NTL's
acquisition of the cable business of Cable and Wireless Communications (March
23, 2000, unless a later date is approved by the UK Director General), and (2)
relinquish certain significant governance rights with respect to us. The comment
period deadline for the published, recommended undertakings is April 12, 2000.
We cannot predict what undertakings, if any, will ultimately be executed by TdF,
when TdF might undertake such undertakings or what effect such undertakings
might have on us.

   TdF's Governance Rights May Restrict Us From Taking Actions Our Board of
 Directors Consider to Be in Your Best Interests
   We have granted TdF the ability to govern some of our activities, including
the ability to:

   .    prohibit us from entering into material acquisitions, issuing new equity
        securities and incurring significant indebtedness;

   .    elect up to two members of our board of directors; and

   .    elect at least one director to the executive and nominating and
        corporate governance committees of our board of directors.


   In addition, TdF has significant governance rights over our U.K. business.
Although TdF, through its subsidiary, DFI, currently has only a 20% equity
interest in Crown Castle UK Holdings Limited, TdF has the right to restrict a
number of corporate actions at Crown Castle UK Holdings Limited.

   TdF's exercise of these rights could be contrary to your interests.

   TdF Will Be Able to Buy Our Interest, or Require Us to Buy Their Interest, in
 Our U.K. Business in Connection with a Sale of CCIC

   Under the circumstances described below, TdF will have the right to acquire
all of our shares in Crown Castle UK Holdings Limited or to require us to
purchase all of TdF's shares in Crown Castle UK Holdings Limited, at fair market
value in either case.  This right will be triggered under the following
circumstances:

   .    the sale of all or substantially all of our assets;

   .    a merger, consolidation or similar transaction that would result in any
        person owning more than 50% of our voting power or equity securities;

   .    an unsolicited acquisition by any person of more than 25% of our voting
        power or equity securities; or

   .    other circumstances arising from an acquisition by any person that would
        give rise to a right of the BBC to terminate our analog or digital
        transmission contracts with the BBC.


   Further, immediately before any of these events occur, TdF will have the
right to require us to purchase 50% of their Class A common stock in cash at the
same price we would have to pay once the event occurs.

   If we were required to sell our shares in Crown Castle UK Holdings Limited to
TdF, we would no longer own our U.K. business and would lose all the benefits of
owning such business.  On the other hand, if we were required to purchase all of
TdF's shares in Crown Castle UK Holdings Limited and/or purchase 50% of their

                                       29
<PAGE>

Class A common stock, we cannot guarantee that we would have the necessary funds
to do so or that we would be permitted to do so at the time under our debt
instruments.  If we did not have sufficient funds, we would have to seek
additional financing.  We cannot guarantee, however, that such financing would
be available on commercially reasonable terms or at all.  If such financing were
not available, we might be forced to sell assets at unfavorable prices in order
to generate the cash needed to buy the shares from TdF.  In addition, our
obligation to purchase TdF's shares could result in an event of default under
our debt instruments.

   TdF Has an Option to Put to Us Its Interest in Our U.K. Business Following
 the Second Anniversary of the Roll-Up of Our U.K. Business; This Could Result
 in A Default Under Our Debt Instruments or Substantial Dilution to Our Other
 Stockholders
   If TdF has not exchanged its interest in Crown Castle UK Holdings Limited for
additional interest in CCIC by the second anniversary of the roll-up of our U.K.
business, TdF will have the right to require us to purchase all of their shares
in Crown Castle UK Holdings Limited, at fair market value.  We may elect to pay
either (1) in cash or (2) with our common stock at a discount of 15% to its
market value.  We cannot guarantee that we will have sufficient funds to
purchase such shares for cash if TdF were to require us to purchase their shares
of capital stock of Crown Castle UK Holdings Limited.  If we did not have
sufficient funds, we would either need to seek additional financing or purchase
the shares with our common stock.  We cannot guarantee that we could obtain such
financing on terms acceptable to us.  In addition, the purchase of these shares
for cash could result in an event of default under our debt instruments.  If we
were to issue shares of common stock to effect the purchase, this:

   .    would result in substantial dilution to our other stockholders;

   .    could adversely affect the market prices of the common stock; and

   .    could impair our ability to raise additional capital through the sale of
        our equity securities.


   TdF Has Preemptive Rights to Acquire Our Common Stock When We Otherwise Issue
 Common Stock; This Could Result in Substantial Dilution to Our Other
 Stockholders
   Except in limited circumstances, if we issue any equity securities to any
person, including the closings of the GTE Wireless transaction, we must offer
TdF the right to purchase, at the same cash price, up to an amount of such
equity securities as would be necessary for TdF and its affiliates to maintain
their consolidated ownership percentage in us before such issuance. TdF
exercised these preemptive rights as a result of our acquisition of Millennium
Communications Limited in the United Kingdom on October 8, 1998, as a result of
our contribution of shares of our common stock to the Bell Atlantic joint
venture on March 31, 1999 and as a result of our equity offering in May 1999.
The further exercise of these rights by TdF could result in substantial dilution
to our other stockholders.

 WE REQUIRE SIGNIFICANT CAPITAL TO FUND OUR OPERATIONS AND MAKE ACQUISITIONS

   If we are unable to raise capital in the future, we will be unable to achieve
our currently contemplated business strategy and may not be able to fund our
operations.

   We will require substantial capital (1) as we increase the number of towers
we own and manage by partnering with wireless carriers to assume ownership or
control of their existing towers, by pursuing opportunities to build new towers,
or build-to-suit opportunities, for wireless carriers and by pursuing other
tower acquisition opportunities and (2) to acquire existing transmission
networks globally as opportunities arise. If we are unable to raise capital when
our needs arise, we will be unable to pursue our current business strategy and
may not be able to fund our operations.

   To fund the execution of our business strategy, including the agreed to
transactions described in this document and the construction of new towers
that we have agreed to build, we expect to use the net proceeds of our recent
offerings and borrowings available under our U.S. and U.K. credit facilities.
We will have

                                       30
<PAGE>

additional cash needs to fund our operations and acquisitions in the future,
including some of the agreed to transactions. We may also have additional cash
needs in the near term if additional tower acquisitions or build-to-suit
opportunities arise. Some of the opportunities that we are currently pursuing
could require significant additional capital. If we do not otherwise have cash
available, or borrowings under our credit facilities have otherwise been
utilized, when our cash need arises, we would be forced to seek additional debt
or equity financing or to forego the opportunity. In the event we determine to
seek additional debt or equity financing, there can be no assurance that any
such financing will be available, on commercially acceptable terms or at all, or
permitted by the terms of our existing indebtedness.

 WE MAY NOT BE ABLE TO CONSTRUCT OR ACQUIRE NEW TOWERS AT THE PACE AND IN THE
 LOCATIONS THAT WE DESIRE

   If we are unable to construct new towers at the pace and in the locations
that we desire, we may not be able to satisfy our current agreements to build
new towers, and we may have difficulty finding tenants to lease space on our new
towers. If we are unable to acquire new towers at the pace and in the locations
that we desire, our growth may be adversely affected.

   Our growth strategy depends in part on our ability to construct and operate
towers in conjunction with expansion by wireless carriers.  If we are unable to
build new towers when wireless carriers require them, or we are unable to build
new towers where we believe the best opportunity to add tenants exists, we could
fail to meet our contractual obligations under build-to-suit agreements, and we
could lose opportunities to lease space on our towers.

    We currently have plans to commence construction on approximately 1,170
additional towers during fiscal 2000. Our ability to construct these new towers
can be affected by a number of factors beyond our control, including:

   .    zoning and local permitting requirements and national regulatory
        approvals;

   .    availability of construction equipment and skilled construction
        personnel; and

   .    bad weather conditions.


   In addition, as the concern over tower proliferation has grown in recent
years, certain communities have placed restrictions on new tower construction or
have delayed granting permits required for construction.  You should consider
that:

   .    the barriers to new construction may prevent us from building towers
        where we want;

   .    we may not be able to complete the number of towers planned for
        construction in accordance with the requirements of our customers; and

   .    we cannot guarantee that there will be a significant need for the
        construction of new towers once the wireless carriers complete their
        tower networks.


   All of the above factors could affect both our domestic and international
operations. In addition, competition laws could prevent us from acquiring or
constructing towers or tower networks in certain geographical areas.

 OUR BUSINESS DEPENDS ON THE DEMAND FOR WIRELESS COMMUNICATIONS

   We will be adversely affected by any slowdown in the growth of, or reduction
in demand for, wireless communications.

   Demand for our site rentals depends on demand for communication sites from
wireless carriers, which, in turn, depends on the demand for wireless services.
The demand for our sites depends on many factors which we cannot control,
including:

   .    the level of demand for wireless services generally;

   .    the financial condition and access to capital of wireless carriers;

                                       31
<PAGE>

   .    the strategy of carriers relating to owning or leasing communication
        sites;

   .    changes in telecommunications regulations; and

   .    general economic conditions.


   A slowdown in the growth of, or reduction in, demand in a particular wireless
segment could adversely affect the demand for communication sites.  Moreover,
wireless carriers often operate with substantial indebtedness, and financial
problems for our customers could result in accounts receivable going
uncollected, in the loss of a customer and the associated lease revenue or in a
reduced ability of these customers to finance expansion activities.  Finally,
advances in technology, such as the development of new satellite and antenna
systems, could reduce the need for land-based, or terrestrial, transmission
networks.  The occurrence of any of these factors could have a material adverse
effect on our financial condition and results of operations.

 VARIABILITY IN DEMAND FOR NETWORK SERVICES MAY REDUCE THE PREDICTABILITY OF OUR
 RESULTS

   Our network services business has historically experienced significant
volatility in demand.  As a result, the operating results of our network
services business for any particular period may vary significantly, and should
not be considered as necessarily being indicative of longer-term results.

   Demand for our network services fluctuates from period to period and within
periods.  These fluctuations are caused by a number of factors, including:

   .    the timing of customers' capital expenditures;

   .    annual budgetary considerations of customers;

   .    the rate and volume of wireless carriers' tower build-outs;

   .    timing of existing customer contracts; and

   .    general economic conditions.


   While demand for our network services fluctuates, we must incur certain
costs, such as maintaining a staff of network services employees in anticipation
of future contracts, even when there may be no current business. Furthermore, as
wireless carriers complete their build-outs, the need for the construction of
new towers and the demand for our network services could decrease significantly
and could result in fluctuations and, possibly, significant declines in our
operating performance.

 WE OPERATE OUR BUSINESS IN AN INCREASINGLY COMPETITIVE INDUSTRY AND MANY OF OUR
 COMPETITORS HAVE SIGNIFICANTLY MORE RESOURCES

   As a result of this competition, we may find it more difficult to achieve
favorable lease rates on our towers and we may be forced to pay more for future
tower acquisitions.

   We face competition for site rental customers from various sources,
including:

   .    other large independent tower owners;

   .    wireless carriers that own and operate their own towers and lease
        antenna space to other carriers;

   .    site development companies that acquire antenna space on existing towers
        for wireless carriers and manage new tower construction; and

   .    traditional local independent tower operators.

                                       32
<PAGE>

   Wireless carriers that own and operate their own tower portfolios generally
are substantially larger and have greater financial resources than we have.
Competition for tenants on towers could adversely affect lease rates and service
income.

   In addition, competition for the acquisition of towers is keen, and we expect
it to continue to grow. We not only compete against other independent tower
owners and operators, but also against wireless carriers, broadcasters and site
developers. As competition consolidates, we may be faced with fewer acquisition
opportunities, as well as higher acquisition prices. While we regularly explore
acquisition opportunities, we cannot guarantee that we will be able to identify
suitable towers to acquire in the future.

 A SUBSTANTIAL PORTION OF OUR REVENUES IS DEPENDENT UPON AGREEMENTS WITH THE
 BBC, NTL, BELL ATLANTIC, MOBILITY, BELL SOUTH DCS, GTE WIRELESS AND POWERTEL

   If we were to lose our contracts with the BBC or our site sharing agreement
with NTL, we would likely lose a substantial portion of our revenues.  The BBC
accounted for approximately 28% of our revenues for the twelve-month period
ended December 31, 1999.

   Our broadcast business is substantially dependent on our contracts with the
BBC.  We cannot guarantee that the BBC will renew our contracts or that they
will not attempt to negotiate terms that are not as favorable to us as those in
place now.  If we were to lose these BBC contracts, our business, results of
operations and financial condition would be materially adversely affected.  The
initial term of our analog transmission contract with the BBC will expire on
March 31, 2007, and our digital transmission contract with the BBC expires on
October 31, 2010.  In addition, our digital transmission contract with the BBC
may be terminated by the BBC after five years if the BBC's board of governors
does not believe that digital television in the United Kingdom has enough
viewers.

   A substantial portion of our U.K. broadcast transmission operations are
conducted using sites owned by National Transmission Limited, or NTL, our major
competitor in the United Kingdom. NTL also utilizes our sites for their
broadcast operations. This site sharing arrangement with NTL may be terminated
with five years' notice by either us or NTL, and may be terminated sooner upon a
continuing breach of the agreement. The agreement is set to expire on December
31, 2005. We cannot guarantee that this agreement will not be terminated, which
could have a material adverse effect on our business, results of operations and
financial condition. Further, a substantial portion of our revenues are received
from wireless carriers, particularly carriers which transfer their tower assets
to us. We cannot guaranty that the lease or management agreements with such
carriers will not be terminated or any carrier will renew such agreements.

 EXTENSIVE REGULATIONS WHICH COULD CHANGE AT ANY TIME AND WHICH WE COULD FAIL TO
 COMPLY WITH REGULATE OUR BUSINESS

   If we fail to comply with applicable regulations, we could be fined or even
lose our right to conduct some of our business.

   A variety of foreign, federal, state and local regulations apply to our
business.  Failure to comply with applicable requirements may lead to civil
penalties or require us to assume costly indemnification obligations or breach
contractual provisions.  We cannot guarantee that existing regulatory policies
will not adversely affect the timing or cost of new tower construction or that
additional regulations will not be adopted which increase delays or result in
additional costs.  These factors could have a material adverse effect on our
financial condition and results of operations.

   Since we signed our analog transmission contract with the BBC, the BBC has
increased its service requirements to include 24-hour broadcasting on our
transmission network for the BBC's two national television services and a
requirement for us to add a number of additional stations to our network to
extend existing BBC services.  The BBC has agreed to increases of approximately
(Pounds)800,000 ($1,261,200) per year in the charges payable by the BBC to us
for these service enhancements. The additional charges, however, may necessitate
an amendment to Crown Castle UK Limited's transmission telecommunications
license. We are discussing with
                                       33
<PAGE>

OFTEL, the relevant regulatory authority in the United Kingdom, the most
appropriate way to rectify this situation in order to allow the additional
services to be provided to the BBC in return for the additional agreed payments.
There can be no assurance that we will achieve a favorable resolution of these
issues with OFTEL.

 EMISSIONS FROM OUR ANTENNAS MAY CREATE HEALTH RISKS

   We could suffer from future claims if the radio frequency emissions from
equipment on our towers is demonstrated to cause negative health effects.

   The government imposes requirements and other guidelines on our towers
relating to radio frequency emissions.  The potential connection between radio
frequency emissions and certain negative health effects, including some forms of
cancer, has been the subject of substantial study by the scientific community in
recent years.  To date, the results of these studies have been inconclusive.  We
cannot guarantee that claims relating to radio frequency emissions will not
arise in the future.

 OUR INTERNATIONAL OPERATIONS EXPOSE US TO CHANGES IN FOREIGN CURRENCY EXCHANGE
 RATES

   If we fail to properly match or hedge the currencies in which we conduct
business, we could suffer losses as a result of changes in currency exchange
rates.

   We conduct business in countries outside the United States, which exposes us
to fluctuations in foreign currency exchange rates.  We also intend to expand
our international operations in the future.  For the twelve-month period ended
December 31, 1999, approximately 56% of our consolidated revenues originated
outside the United States, all of which were denominated in currencies other
than U.S. dollars, principally pounds sterling.  We have not historically
engaged in significant hedging activities relating to our non-U.S. dollar
operations, and we could suffer future losses as a result of changes in currency
exchange rates.

 WE ARE HEAVILY DEPENDENT ON OUR SENIOR MANAGEMENT

   If we lose members of our senior management, we may not be able to find
appropriate replacements on a timely basis and our business could be adversely
affected.

   Our existing operations and continued future development are dependent to a
significant extent upon the performance and active participation of certain key
individuals, including our chief executive officer and the chief operating
officers of our principal U.S. and U.K. subsidiaries.  We cannot guarantee that
we will be successful in retaining the services of these, or other key
personnel.  None of our executives have signed noncompetition agreements.  If we
were to lose any of these individuals, we may not be able to find appropriate
replacements on a timely basis and our financial condition and results of
operations could be materially adversely affected.
<TABLE>
<CAPTION>

ITEM 2.      PROPERTIES
<S>          <C>
</TABLE>

   Our principal corporate offices are located in Canonsburg, Pennsylvania, and
Houston, Texas.

<TABLE>
<CAPTION>
                                                 Size
              Location                Title    (Sq. Ft.)        Use
          -----------------           ------   ---------  ----------------
   <S>                                <C>        <C>       <C>
   Canonsburg, PA.................... Owned      48,500    Corporate office
   Houston, TX....................... Leased     19,563    Corporate office
   Warwick, UK....................... Owned      50,000    Corporate office
</TABLE>

   We have approximately 17 additional regional offices in the United States
and Puerto Rico which are located throughout our tower coverage areas to serve
local customers.

                                       34
<PAGE>

   In the United States, our interests in our tower sites are comprised of a
variety of ownership interests, leases created by long-term lease agreements,
private easements and easements, licenses or rights-of-way granted by government
entities.  In rural areas, a tower site typically consists of a three- to five-
acre tract, which supports towers, equipment shelters and guy wires to stabilize
the structure.  Less then 3,000 square feet are required for a self-supporting
tower structure of the kind typically used in metropolitan areas.  Our land
leases generally have five- or ten-year terms and frequently contain one or more
renewal options.  Some land leases provide "trade-out" arrangements whereby we
allow the landlord to use tower space in lieu of paying all or part of the land
rent.  As of December 31, 1999, we had approximately 5,463 land leases in the
United States. Under the 2000 Credit Facility, our senior lenders have liens on
a substantial number of our land leases and other property interests in the
United States.

   In the United Kingdom, tower sites range from less than 400 square feet for a
small rural TV booster station to over 50 acres for a high-power radio station.
As in the United States, the site accommodates the towers, equipment buildings
or cabins and, where necessary, guy wires to support the structure.  Land is
either owned freehold, which is usual for the larger sites, or is held on long-
term leases that generally have terms of 21 years or more.  As of December 31,
1999, we had approximately 1,605 land leases in the U.K.

ITEM 3.     LEGAL PROCEEDINGS

   We are occasionally involved in legal proceedings that arise in the ordinary
course of business.  Most of these proceedings are appeals by landowners of
zoning and variance approvals of local zoning boards.  While the outcome of
these proceedings cannot be predicted with certainty, management does not expect
any pending matters to have a material adverse effect on our financial condition
or results of operations.

ITEM 4.     SUBMISSIONS OF MATTERS TO A VOTE OF SECURITY HOLDERS

   None.

                                       35
<PAGE>

                                    PART II

ITEM 5.     MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
            MATTERS

PRICE RANGE OF COMMON STOCK

   The Common Stock was initially offered to the public on August 18, 1998 at a
price of $13.00 per share. The Common Stock is listed and traded on The Nasdaq
Stock Market's National Market(SM) ("Nasdaq") under the symbol "TWRS". The
following table sets forth for the calendar periods indicated the high and low
sales prices per share of the Common Stock as reported by Nasdaq.
<TABLE>
<CAPTION>
                                              High       Low
                                             -------   -------
1998:
<S>                                          <C>       <C>
 Third Quarter.............................. $ 13.25  $   6.69
 Fourth Quarter.............................   23.50      6.00

1999:
 First Quarter.............................. $ 23.50  $  16.63
 Second Quarter.............................   21.50     16.38
 Third Quarter..............................   25.50     14.69
 Fourth Quarter.............................   33.50     15.44

2000:
 First Quarter (through March 15, 2000)..... $ 42.69  $  28.19
</TABLE>

   On March 15, 2000, the last reported sale price of the Common Stock as
reported by Nasdaq was $40.06. As of March 15, 2000, there were approximately
473 holders of record of the Common Stock.

DIVIDEND POLICY

   We have never declared or paid any cash dividends on our capital stock and do
not anticipate paying cash dividends on our capital stock in the foreseeable
future.  It is our current policy to retain earnings to finance the expansion of
our operations.  Future declaration and payment of cash dividends, if any, will
be determined in light of the then-current conditions, including our earnings,
operations, capital requirements, financial condition and other factors deemed
relevant by the Board of Directors.  In addition, our ability to pay dividends
is limited by the terms of our debt instruments and the terms of the certificate
of designations in respect of our exchangeable preferred stock.

ISSUANCE OF UNREGISTERED SECURITIES

   On December 2, 1999, we issued an additional 599,054 unregistered shares of
common stock to an affiliate of BellSouth Corporation, in connection with a
closing relating to the BellSouth transaction. The agreement of sublease
relating to the BellSouth transaction will close in a series of closings, with
approximately 30% of the consideration being paid with our common stock. As of
December 31, 1999, we have issued a total of 7,728,787 shares of common stock to
BellSouth in connection with closings relating to the BellSouth transaction. See
"Business--Recent and Agreed to Transactions." We contemplate that a total of up
to 9.1 million shares of our common stock will be issued to BellSouth in
connection with the BellSouth transaction.

ITEM 6.     SELECTED HISTORICAL FINANCIAL DATA

   The selected historical consolidated financial and other data for the Company
set forth below for each of the five years in the period ended December 31,
1999, and as of December 31, 1995, 1996, 1997, 1998 and 1999, have been derived
from the consolidated financial statements of the Company, which have been
audited by KPMG llp, independent certified public accountants.  The results of
operations for the year ended December 31, 1999 are not comparable to the year
ended December 31, 1998, the results for the year ended December 31, 1998 are
not comparable to the year ended December 31, 1997, and the results for the year
ended December 31, 1997 are not comparable to the year ended December 31, 1996
as a result of business acquisitions consummated in 1997, 1998 and 1999.
Results of operations of these acquired businesses are included in the Company's
consolidated financial statements for the periods after the respective dates of
acquisition.  The information set forth below should be read in conjunction with
"Item 7. Management's Discussion and Analysis of Financial Condition and Results
of Operations" and "Item 8. Financial Statements and Supplementary Data".

                                       36
<PAGE>

<TABLE>
<CAPTION>
                                                                           Years Ended December 31,
                                                        ---------------------------------------------------------------
                                                          1995        1996         1997         1998           1999
                                                        ---------   ---------   ----------   -----------   ------------
<S>                                                     <C>         <C>         <C>          <C>           <C>
                                                             (In thousands of dollars, except per share amounts)
STATEMENT OF OPERATIONS DATA:
Net revenues:
 Site rental and broadcast transmission...............  $  4,052    $  5,615    $  11,010    $   75,028    $   267,894
 Network services and other...........................         6         592       20,395        38,050         77,865
                                                        --------    --------    ---------    ----------    -----------
   Total net revenues.................................     4,058       6,207       31,405       113,078        345,759
                                                        --------    --------    ---------    ----------    -----------
Costs of operations:
 Site rental and broadcast transmission...............     1,226       1,292        2,213        26,254        114,436
 Network services and other...........................        --           8       13,137        21,564         42,312
                                                        --------    --------    ---------    ----------    -----------
   Total costs of operations..........................     1,226       1,300       15,350        47,818        156,748
                                                        --------    --------    ---------    ----------    -----------
General and administrative............................       729       1,678        6,824        23,571         43,823
Corporate development/(a)/............................       204       1,324        5,731         4,625          5,403
Restructuring charges.................................        --          --           --            --          5,645
Non-cash compensation charges/(b)/....................        --          --           --        12,758          2,173
Depreciation and amortization.........................       836       1,242        6,952        37,239        130,106
                                                        --------    --------    ---------    ----------    -----------
Operating income (loss)...............................     1,063         663       (3,452)      (12,933)         1,861
Equity in earnings (losses) of unconsolidated
 affiliate............................................         --          --       (1,138)        2,055             --
Interest and other income (expense)/(c)/..............        53         193        1,951         4,220         17,731
Interest expense and amortization of deferred
 financing costs......................................    (1,137)     (1,803)      (9,254)      (29,089)      (110,908)
                                                        --------    --------    ---------    ----------    -----------
Loss before income taxes, minority interests and
 cumulative effect of change in accounting
 principle............................................       (21)       (947)     (11,893)      (35,747)       (91,316)
Provision for income taxes............................        --         (10)         (49)         (374)          (275)
Minority interests....................................        --          --           --        (1,654)        (2,756)
                                                        --------    --------    ---------    ----------    -----------
Loss before cumulative effect of change in
 accounting principle.................................       (21)       (957)     (11,942)      (37,775)       (94,347)
Cumulative effect of change in accounting
 principle for costs of start-up activities...........        --          --           --            --         (2,414)
                                                        --------    --------    ---------    ----------    -----------
Net loss..............................................       (21)       (957)     (11,942)      (37,775)       (96,761)
Dividends on preferred stock..........................        --          --       (2,199)       (5,411)       (28,881)
                                                        --------    --------    ---------    ----------    -----------
Net loss after deduction of dividends on preferred
 stock................................................  $    (21)   $   (957)   $ (14,141)   $  (43,186)   $  (125,642)
                                                        ========    ========    =========    ==========    ===========
Per common share - basic and diluted:
 Loss before cumulative effect of change in
  accounting principle................................    $(0.01)     $(0.27)      $(2.27)       $(1.02)        $(0.94)
 Cumulative effect of change in accounting
  principle...........................................        --          --           --            --          (0.02)
                                                        --------    --------    ---------    ----------    -----------
 Net loss.............................................    $(0.01)     $(0.27)      $(2.27)       $(1.02)        $(0.96)
                                                        ========    ========    =========    ==========    ===========
Common shares outstanding - basic and diluted (in
 thousands)...........................................     3,316       3,503        6,238        42,518        131,466
                                                        ========    ========    =========    ==========    ===========
OTHER DATA:
EBITDA/(d)/...........................................  $  1,899    $  1,905    $   3,500    $   37,064    $   139,785
Summary cash flow information:
 Net cash provided by (used for) operating
  activities..........................................     1,672        (530)        (624)       44,976         92,608
 Net cash used for investing activities...............   (16,673)    (13,916)    (111,484)     (149,248)    (1,509,146)
 Net cash provided by financing activities............    15,597      21,193      159,843       345,248      1,670,402
Ratio of earnings to fixed charges/(e)/...............        --          --           --            --             --

BALANCE SHEET DATA (AT PERIOD END):
Cash and cash equivalents.............................  $    596    $  7,343    $  55,078    $  296,450    $   549,328
Property and equipment, net...........................    16,003      26,753       81,968       592,594      2,468,101
Total assets..........................................    19,875      41,226      371,391     1,523,230      3,836,650
Total debt............................................    11,182      22,052      156,293       429,710      1,542,343
Redeemable preferred stock/(f)/.......................     5,175      15,550      160,749       201,063        422,923
Total stockholders' equity (deficit)..................       619        (210)      41,792       737,562      1,617,747
</TABLE>

                                       37
<PAGE>

(a) Corporate development expenses represent costs incurred in connection with
    acquisitions and development of new business initiatives. These expenses
    consist primarily of allocated compensation, benefits and overhead costs
    that are not directly related to the administration or management of
    existing towers. For the year ended December 31, 1997, such expenses include
    (1) nonrecurring cash bonuses of $0.9 million paid to certain executive
    officers in connection with CCIC's initial investment in CCUK (the "CCUK
    Investment"); and (2) a nonrecurring cash charge of $1.3 million related to
    the purchase by CCIC of shares of common stock from CCIC's former chief
    executive officer in connection with the CCUK Investment.
(b) Represents charges related to the issuance of stock options to certain
    employees and executives.
(c) Includes a $1.2 million fee received in March 1997 as compensation for
    leading the investment consortium which provided the equity financing for
    CCUK in connection with the CCUK Investment.
(d) EBITDA is defined as operating income (loss) plus depreciation and
    amortization and non-cash compensation charges. EBITDA is presented as
    additional information because management believes it to be a useful
    indicator of our ability to meet debt service and capital expenditure
    requirements. It is not, however, intended as an alternative measure of
    operating results or cash flow from operations (as determined in accordance
    with generally accepted accounting principles). Furthermore, our measure of
    EBITDA may not be comparable to similarly titled measures of other
    companies.
(e) For purposes of computing the ratio of earnings to fixed charges, earnings
    represent income (loss) before income taxes, fixed charges and equity in
    earnings (losses) of unconsolidated affiliate. Fixed charges consist of
    interest expense, the interest component of operating leases and
    amortization of deferred financing costs. For the years ended December 31,
    1995, 1996, 1997, 1998 and 1999, earnings were insufficient to cover fixed
    charges by $21,000, $0.9 million, $10.8 million, $37.8 million and $91.3
    million, respectively.
(f) The 1995, 1996 and 1997 amounts represent (1) the senior convertible
    preferred stock privately placed by CCIC in August 1997 and October 1997,
    all of which has been converted into shares of common stock; and (2) the
    Series A convertible preferred stock, the Series B convertible preferred
    stock and the Series C convertible preferred stock privately placed by CCIC
    in April 1995, July 1996 and February 1997, respectively, all of which has
    been converted into shares of common stock in connection with the
    consummation of our IPO. The 1998 amount represents the 12 3/4% Senior
    Exchangeable Preferred Stock due 2010.

ITEM 7.     MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
            RESULTS OF OPERATIONS

   The following discussion is intended to assist in understanding our
consolidated financial condition as of December 31, 1999 and our consolidated
results of operations for each year in the three-year period ended December 31,
1999. The statements in this discussion regarding the industry outlook, our
expectations regarding the future performance of our businesses and the other
nonhistorical statements in this discussion are forward-looking statements.
These forward-looking statements are subject to numerous risks and
uncertainties, including but not limited to the uncertainties relating to
decisions on capital expenditures to be made in the future by wireless carriers
and broadcasters. This discussion should be read in conjunction with "Selected
Historical Financial Data" and the consolidated financial statements and related
notes included elsewhere in this document. Results of operations of the acquired
businesses that are wholly and majority owned are included in our consolidated
financial statements for the periods subsequent to the respective dates of
acquisition. As such, our results of operations for the year ended December 31,
1999 are not comparable to the year ended December 31, 1998, and the results for
the year ended December 31, 1998 are not comparable to the year ended December
31, 1997.

OVERVIEW

   The continued growth of our business depends substantially on the condition
of the wireless communications and broadcast industries. We believe that the
demand for communications sites will continue to grow and expect that, due to
increased competition, wireless carriers will continue to seek operating and
capital efficiencies by (1) outsourcing certain network services and the build-
out and operation of new and existing infrastructure; and (2) planning to use a
tower site as a common location, or "co-locating", for the placement of their
antennas and transmission equipment alongside the equipment of other
communications providers. In addition, we believe that more wireless carriers
will seek to sell their wireless communications infrastructure to,
or establish joint ventures with, experienced infrastructure providers, such as
the Company, that have the ability to manage networks.

   Further, we believe that wireless carriers and broadcasters will continue to
seek to outsource the operation of their towers and, eventually, their
transmission networks, including the transmission of their signals. Management
believes that our ability to manage towers and transmission networks and our
proven track record of providing services addressing all aspects of signaling
systems from the originating station to the terminating

                                       38
<PAGE>

receiver, or "end-to-end" services, to the wireless communications and
broadcasting industries position our company to capture such business.

   The willingness of wireless carriers to utilize our infrastructure and
related services is affected by numerous factors, including:

   .    consumer demand for wireless services;

   .    interest rates;

   .    cost of capital;

   .    availability of capital to wireless carriers;

   .    tax policies;

   .    willingness to co-locate equipment;

   .    local restrictions on the proliferation of towers;

   .    cost of building towers; and

   .    technological changes affecting the number of communications sites
        needed to provide wireless communications services to a given geographic
        area.

Our revenues that are derived from the provision of transmission services to the
broadcasting industry will be affected by:

   .    the timing of the roll-out of digital television broadcasts from tower-
        mounted antenna systems, or "digital terrestrial television broadcasts",
        in the United Kingdom, as well as in the United States and other
        countries around the world;

   .    consumer demand for digital terrestrial broadcasting;

   .    interest rates;

   .    cost of capital;

   .    zoning restrictions on towers; and

   .    the cost of building towers.


   As an important part of our business strategy, we will seek:

   (1) to maximize utilization of our tower capacity,

   (2) to utilize the expertise of U.S. and U.K. personnel to capture global
       growth opportunities,

   (3) to partner with wireless carriers to assume ownership of their existing
       towers, and

   (4) to acquire existing transmission networks globally as opportunities
       arise.

RESULTS OF OPERATIONS

   Our primary sources of revenues are from:

   (1) renting antenna space on towers and rooftops sites,

   (2) providing analog and digital broadcast transmission services, and

   (3) providing network services.

                                       39
<PAGE>

   Site rental revenues in the U.S. are received primarily from wireless
communications companies, including those operating in the following categories
of wireless communications:

   .    microwave;

   .    cellular;

   .    personal communications services, a digital service operating at a
        higher frequency range than cellular and is provided by companies such
        as Sprint PCS, OmniPoint and PrimeCo;

   .    paging;

   .    specialized mobile radio, a service operating in the frequency range
        used for two-way radio communication by public safety, trucking
        companies, and other dispatch service users; and

   .    enhanced specialized mobile radio, a service operating in the frequency
        range typically used for digital communications and provided by Nextel
        and others.

Site rental revenues are generally recognized on a monthly basis under lease
agreements, which typically have original terms of five years (with three or
four optional renewal periods of five years each).  Average revenues for our
managed rooftop sites are significantly less than for the owned and managed
towers because a substantial portion of the revenues from the tenants at rooftop
sites is remitted to the building owner or manager.

   Broadcast transmission services revenues in the U.K. are received for both
analog and digital transmission services. Monthly analog transmission revenues
are principally received from the BBC under a contract with an initial 10-year
term through March 31, 2007. Digital transmission services revenues from the BBC
and ONdigital are recognized under contracts with initial terms of 12 years
through November 15, 2010. Monthly revenues from these digital transmission
contracts increase over time as the network rollout progresses. See "Item 1.
Business--U.K. Operations--Significant Contracts".

   Site rental revenues in the U.K. are received from other broadcast
transmission service providers (primarily NTL) and wireless communications
companies, including all four U.K. cellular operators (Cellnet, Vodafone,
One2One and Orange).  Site rental revenues are generally recognized on a monthly
basis under lease agreements with original terms of three to 12 years.  Such
lease agreements generally require annual payments in advance, and include
rental rate adjustment provisions between one and three years from the
commencement of the lease. Site rental revenues are expected to become an
increasing portion of CCUK's total U.K. revenue base, and we believe that the
demand for site rental from communication service providers will increase in
line with the expected growth of these communication services in the United
Kingdom.

   Network services revenues in the U.S. consist of revenues from:

   (1) network design and site selection,

   (2) site acquisition,

   (3) site development and construction,

   (4) antenna installation, and

   (5) other services.

Network services revenues are received primarily from wireless communications
companies.  Network services revenues in the U.S. are recognized under service
contracts which provide for billings on either a fixed price basis or a time and
materials basis.  Demand for our network services fluctuates from period to
period and within periods.  See "Item 1. Business--Risk Factors--Variability in
Demand for Network Services May Reduce the Predictability of Our Results".
Consequently, the operating results of our network services businesses for any
particular period may vary significantly, and should not be considered as
indicative of longer-term results.  We also derive revenues from the ownership
and operation of microwave radio and

                                       40
<PAGE>

specialized mobile radio networks in Puerto Rico where we own radio wave
spectrum in the 2,000 MHz and 6,000 MHz range (for microwave radio) and the 800
MHz range (for specialized mobile radio). These revenues are generally
recognized under monthly management or service agreements.

   Network services revenues in the U.K. consist of (1) network design and site
selection, site acquisition, site development and antenna installation and (2)
site management and other services.  Network design and development and related
services are provided to:

   (1) a number of broadcasting and related organizations, both in the United
       Kingdom and other countries,

   (2) all four U.K. cellular operators, and

   (3) a number of other wireless communications companies, including Dolphin
       and Highway One.

These services are usually subject to a competitive bid, although a significant
proportion result from an operator coming onto an existing CCUK site. Revenues
from such services are recognized on either a fixed price or a time and
materials basis. Site management and other services, consisting of both network
monitoring and equipment maintenance, are carried out in the United Kingdom for
a number of emergency service organizations. CCUK receives revenues for such
services under contracts with original terms of between three and five years.
Such contracts provide fixed prices for network monitoring and variable pricing
dependent on the level of equipment maintenance carried out in a given period.

   Costs of operations for site rental in the U.S. primarily consist of:

   .    land leases;

   .    repairs and maintenance;

   .    utilities;

   .    insurance;

   .    property taxes;

   .    monitoring costs; and

   .    in the case of managed sites, rental payments.

For any given tower, such costs are relatively fixed over a monthly or an annual
time period. As such, operating costs for owned towers do not generally increase
significantly as additional customers are added. However, rental expenses at
certain managed towers increase as additional customer antennas are added,
resulting in higher incremental revenues but lower incremental margins than on
owned towers.

   Costs of operations for broadcast transmission services in the U.K. consist
primarily of employee compensation and related benefits costs, utilities, rental
payments under the Site-Sharing Agreement with NTL, circuit costs and repairs
and maintenance on both transmission equipment and structures. Site rental
operating costs in the U.K. consist primarily of employee compensation and
related benefits costs, utilities and repairs and maintenance. The majority of
such costs are relatively fixed in nature, with increases in revenue from new
installations on existing sites generally being achieved without a corresponding
increase in costs.

   Costs of operations for network services consist primarily of employee
compensation and related benefits costs, subcontractor services, consulting
fees, and other on-site construction and materials costs. We incur these network
services costs (1) to support our internal operations, including construction
and maintenance of our owned towers, and (2) to maintain the employees necessary
to provide end-to-end services to third parties regardless of the level of such
business at any time. We believe that our experienced staff enables us to
provide the type of end-to-end services that enhance our ability to acquire
access to the infrastructure of wireless carriers and to attract significant
build-to-suit contracts.

                                       41
<PAGE>

   General and administrative expenses consist primarily of:

   .    employee compensation, training, recruitment and related benefits costs;

   .    advertising;

   .    professional and consulting fees;

   .    office rent and related expenses; and

   .    travel costs.


   Corporate development expenses represent costs incurred in connection with
acquisitions and development of new business initiatives.  These expenses
consist primarily of:

   .    allocated compensation and external professional fees;

   .    benefits; and

   .    overhead costs that are not directly related to the administration or
        management of existing towers.


   Depreciation and amortization charges relate to our property and equipment
(which consists primarily of towers, broadcast transmission equipment,
associated buildings, construction equipment and vehicles), goodwill and other
intangible assets recorded in connection with business acquisitions.
Depreciation of towers, broadcast transmission equipment and amortization of
goodwill are computed with a useful life of 20 years. Amortization of other
intangible assets (principally the value of existing site rental contracts at
Crown Communication) is computed with a useful life of 10 years. Depreciation of
buildings is computed with useful lives ranging from 20 to 50 years.
Depreciation of construction equipment and vehicles are generally computed with
useful lives of 10 years and 5 years, respectively.

   In May 1997, we completed the acquisition of TEA and the acquisition of
TeleStructures. In August 1997, we completed the acquisition of Crown
Communication. In August 1998, we completed a share exchange with the
shareholders of CCUK, under which our ownership of CCUK increased from
approximately 34.3% to 80%. In October 1998, CCUK completed the acquisition of
Millennium. In March 1999, we completed the formation of Crown Atlantic. In June
and December of 1999, we completed the acquisition of towers from Powertel.
Finally, during 1999 we completed the substantial portions of the transactions
with BellSouth and BellSouth DCS. Results of operations of these acquired
businesses and towers are included in our consolidated financial statements for
the periods subsequent to the respective dates of acquisition. As such, our
results of operations for the year ended December 31, 1999 are not comparable to
the year ended December 31, 1998, and the results for the year ended December
31, 1998 are not comparable to the year ended December 31, 1997.

   The following information is derived from our historical Consolidated
Statements of Operations for the periods indicated.

                                       42
<PAGE>

<TABLE>
<CAPTION>
                                         Year Ended                 Year Ended                    Year Ended
                                      December 31, 1997          December 31, 1998            December 31, 1999
                                   -----------------------  ----------------------------    ------------------------
                                                 Percent                        Percent                      Percent
                                                  of Net                        of Net                        of Net
                                     Amount      Revenues       Amount         Revenues        Amount        Revenues
                                   -----------   ---------   -----------      -----------    ---------     ----------
 <S>                                <C>           <C>         <C>           <C>                 <C>           <C>
                                                            (In thousands of dollars)
Net revenues:
 Site rental and broadcast
  transmission...................   $ 11,010      35.1%       $ 75,028           66.4%      $ 267,894         77.5%
 Network services and other......     20,395      64.9          38,050           33.6          77,865         22.5
                                    --------    ------        --------         ------       ---------       ------
    Total net revenues...........     31,405     100.0         113,078          100.0         345,759        100.0
                                    --------    ------        --------         ------       ---------       ------
Operating expenses:
 Costs of operations:
   Site rental and broadcast
    transmission.................      2,213      20.1          26,254           35.0         114,436         42.7
   Network services and other....     13,137      64.4          21,564           56.7          42,312         54.3
                                    --------                  --------                      ---------
    Total costs of operations....     15,350      48.9          47,818           42.3         156,748         45.4
 General and administrative......      6,824      21.7          23,571           20.8          43,823         12.7
 Corporate development...........      5,731      18.3           4,625            4.1           5,403          1.6
 Restructuring charges...........         --        --              --             --           5,645          1.6
 Non-cash compensation charges...         --        --          12,758           11.3           2,173          0.6
 Depreciation and amortization...      6,952      22.1          37,239           32.9         130,106         37.6
                                    --------    ------        --------         ------       ---------       ------
Operating income (loss)..........     (3,452)    (11.0)        (12,933)         (11.4)          1,861          0.5
Other income (expense):
Equity in earnings (losses) of
 unconsolidated affiliate........     (1,138)     (3.6)          2,055            1.8              --           --
 Interest and other income
  (expense)......................      1,951       6.2           4,220            3.7          17,731          5.1
 Interest expense and
  amortization of deferred
  financing costs................     (9,254)    (29.5)        (29,089)         (25.7)       (110,908)       (32.0)
                                    --------    ------        --------         ------       ---------       ------
Loss before income taxes,
 minority interests and
 cumulative effect of change
 in accounting principle.........    (11,893)    (37.9)        (35,747)         (31.6)        (91,316)       (26.4)
Provision for income taxes.......        (49)     (0.1)           (374)          (0.3)           (275)        (0.1)
Minority interests...............         --        --          (1,654)          (1.5)         (2,756)        (0.8)
                                    --------    ------        --------         ------       ---------       ------
Loss before cumulative
 effect of change in
 accounting principle............    (11,942)    (38.0)        (37,775)         (33.4)        (94,347)       (27.3)
Cumulative effect of change in
 accounting principle for costs
 of start-up activities..........         --        --              --             --          (2,414)        (0.7)
                                    --------    ------        --------         ------       ---------       ------
Net loss.........................   $(11,942)   (38.0)%       $(37,775)        (33.4)%      $ (96,761)      (28.0)%
                                    ========    ======        ========         ======       =========       ======
</TABLE>

   Comparison of Years Ended December 31, 1999 and 1998
   Consolidated revenues for 1999 were $345.8 million, an increase of $232.7
million from 1998.  This increase was primarily attributable to:

   (1) a $192.9 million, or 257.1%, increase in site rental and broadcast
       transmission revenues, of which $119.5 million was attributable to CCUK,
       $37.6 million was attributable to Crown Atlantic and $35.8 million was
       attributable to CCUSA,

   (2) a $12.9 million increase in network services and other revenues from
       CCUSA,

   (3) a $16.1 million increase in network services and other revenues from
       CCUK, and

   (4) $10.3 million in network services and other revenues from Crown Atlantic.


   Costs of operations for 1999 were $156.7 million, an increase of $108.9
million from 1998.  This increase was primarily attributable to:

                                       43
<PAGE>

   (1) an $88.2 million increase in site rental and broadcast transmission
       costs, of which $57.3 million was attributable to CCUK, $16.3 million was
       attributable to Crown Atlantic and $14.6 million was attributable to
       CCUSA,

   (2) a $4.0 million increase in network services costs related to CCUSA,

   (3) an $11.4 million increase in network services costs from CCUK, and

   (4) $4.7 million in network services costs from Crown Atlantic.

Costs of operations for site rental and broadcast transmission as a percentage
of site rental and broadcast transmission revenues increased to 42.7% for 1999
from 35.0% for 1998 because of higher costs attributable to the CCUK, Crown
Atlantic and CCUSA operations. Costs of operations for network services and
other as a percentage of network services and other revenues decreased to 54.3%
for 1999 from 56.7% for 1998, primarily due to higher margins from the CCUK,
Crown Atlantic and CCUSA operations.

   General and administrative expenses for 1999 were $43.8 million, an increase
of $20.3 million from 1998. This increase was primarily attributable to:

   (1) a $10.1 million increase in expenses related to the CCUSA operations,

   (2) a $1.8 million increase in expenses at our corporate office,

   (3) a $3.2 million increase in expenses at CCUK, and

   (4) $5.1 million in expenses at Crown Atlantic.

General and administrative expenses as a percentage of revenues decreased for
1999 to 12.7% from 20.8% for 1998 because of lower overhead costs as a
percentage of revenues for CCUK, Crown Atlantic and CCUSA.

   Corporate development expenses for 1999 were $5.4 million, compared to $4.6
million for 1998.  This increase was attributable to$0.8 million in expenses at
CCUK.  Corporate development expenses for 1998 include discretionary bonuses
related to our performance totaling approximately $0.8 million for certain
members of our management.

   In connection with the formation of Crown Atlantic, we completed a
restructuring of our United States operations during the first quarter of 1999.
The objective of this restructuring was to transition from a centralized
organization to a regionally-based organization in the United States.  In the
first quarter of 1999, we recorded one-time charges of $1.8 million related to
severance payments for staff reductions, as well as costs related to non-
cancelable leases of excess office space.

   We completed a restructuring of our TeleStructures, Inc. operations in
December 1999.  The objective of this restructuring was to reduce the size of
the TeleStructures, Inc. staff to a level which could be justified by its
current operating volume.  In the fourth quarter of 1999, we recorded one-time
charges totaling $3.8 million related to severance payments for the staff
reductions, the recognition of an impairment loss for the remaining goodwill
from the acquisition and other related costs.

   For 1999, we recorded non-cash compensation charges of $2.2 million related
to the issuance of stock options to certain employees and executives, compared
to $12.8 million for 1998.  See "--Compensation Charges Related to Stock Option
Grants".

   Depreciation and amortization for 1999 was $130.1 million, an increase of
$92.9 million from 1998.  This increase was primarily attributable to:

   (1) a $43.3 million increase in depreciation and amortization related to the
       property and equipment and goodwill from CCUK,

                                       44
<PAGE>

   (2) $24.2 million of depreciation and amortization related to the property
       and equipment and goodwill from Crown Atlantic, and

   (3) a $25.0 million increase in depreciation and amortization related to the
       property and equipment, goodwill and other intangible assets related to
       the CCUSA operations.


   The equity in earnings (losses) of unconsolidated affiliate represents our
34.3% share of CCUK's net earnings (losses) for the periods prior to August
1998, at which time the share exchange with CCUK's shareholders was completed.
For the eight months ended August 31, 1998, after making appropriate adjustments
to CCUK's results of operations for such period to conform to generally accepted
accounting principles of the United States, CCUK had net revenues, operating
income, interest expense (including amortization of deferred financing costs)
and net income of $97.2 million, $18.6 million, $13.4 million and $6.0 million,
respectively.  Included in CCUK's results of operations for such period are non-
cash compensation charges for approximately $3.8 million related to the issuance
of stock options to certain members of CCUK's management.

   Interest and other income (expense) for 1999 resulted primarily from:

   (1) the investment of the net proceeds from our initial public offering of
       common stock in August 1998,

   (2) the investment of the excess proceeds from the sale of our 12 3/4% senior
       exchangeable preferred stock in December 1998,

   (3) the investment of the excess proceeds from the sale of our common stock,
       10 3/8% discount notes and 9% senior notes in May 1999,

   (4) the investment of the proceeds from the sale of our common stock to TdF
       in June and July of 1999,

   (5) the investment of the net proceeds from the sale of our 11 1/4% discount
       notes and 9 1/2% senior notes in July 1999, and

   (6) the investment of the net proceeds from the sale of our 8 1/4%
       convertible preferred stock in November 1999, partially offset by costs
       incurred in connection with unsuccessful acquisition attempts, costs
       incurred in connection with an offering of common stock by one of our
       shareholders, a loss incurred upon the disposition of an investment in an
       affiliate and costs incurred in connection with a solicitation of
       consents from certain of our bond and preferred stock holders.

Interest and other income (expense) for 1998 resulted primarily from (1) the
investment of the excess proceeds from the sale of the 10 5/8% discount notes in
November 1997; and (2) the investment of the net proceeds from the initial
public offering in August 1998.  See "--Liquidity and Capital Resources".

   Interest expense and amortization of deferred financing costs for 1999 was
$110.9 million, an increase of $81.8 million, or 281.3%, from 1998. This
increase was primarily attributable to interest on indebtedness at CCUK and
Crown Atlantic, amortization of the original issue discount on the 10 3/8%
discount notes and the 11 1/4% discount notes, interest on the 9% senior notes
and the 9 1/2% senior notes, and interest and fees on the term loans used to
finance the BellSouth and Powertel escrow payments.

   Minority interests represent the minority shareholder's 20% interest in
CCUK's operations and the minority partner's 38.5% interest in Crown Atlantic's
operations.

   The cumulative effect of the change in accounting principle for costs of
start-up activities represents the charge we recorded upon the adoption of SOP
98-5 on January 1, 1999.

                                       45
<PAGE>

   Comparison of Years Ended December 31, 1998 and 1997
   Consolidated revenues for 1998 were $113.1 million, an increase of $81.7
million from 1997.  This increase was primarily attributable to:

   (1) a $64.0 million, or 581.5%, increase in site rental and broadcast
       transmission revenues, of which $52.5 million was attributable to CCUK
       and $11.5 million was attributable to the CCUSA operations,

   (2) an $11.4 million increase in network services revenues from the CCUSA
       operations, and

   (3) $5.6 million in network services revenues from CCUK.


   Costs of operations for 1998 were $47.8 million, an increase of $32.5 million
from 1997.  This increase was primarily attributable to:

   (1) a $24.0 million increase in site rental and broadcast transmission costs,
       of which $20.1 million was attributable to CCUK and $3.9 million was
       attributable to the CCUSA operations,

   (2) a $3.8 million increase in network services costs related to the CCUSA
       operations, and

   (3) $4.2 million in network services costs from CCUK.

Costs of operations for site rental and broadcast transmission as a percentage
of site rental and broadcast transmission revenues increased to 35.0% for 1998
from 20.1% for 1997, primarily due to (1) higher costs attributable to the CCUK
operations which are inherent with CCUK's broadcast transmission business, and
(2) higher costs for the CCUSA operations.  Costs of operations for network
services as a percentage of network services revenues decreased to 56.7% for
1998 from 64.4% for 1997, primarily due to improved margins from the CCUSA
operations.  Margins from the CCUSA network services operations vary from period
to period, often as a result of increasingly competitive market conditions.

   General and administrative expenses for 1998 were $23.6 million, an increase
of $16.7 million from 1997. This increase was primarily attributable to:

   (1) an $11.3 million increase in expenses related to the CCUSA operations,

   (2) a $2.8 million increase in expenses at our corporate office, and

   (3) $2.4 million in expenses at CCUK.

General and administrative expenses as a percentage of revenues decreased for
1998 to 20.8% from 21.7% for 1997 because of lower overhead costs as a
percentage of revenues for CCUK, partially offset by higher overhead costs as a
percentage of revenues for CCUSA and the increase in costs at our corporate
office.

   Corporate development expenses for 1998 were $4.6 million, a decrease of $1.1
million from 1997. Corporate development expenses for 1997 included nonrecurring
compensation charges associated with the CCUK investment of (1) $0.9 million for
certain executive bonuses and (2) the repurchase of shares of our common stock
from a member of our board of directors, which resulted in compensation charges
of $1.3 million. Corporate development expenses for 1998 included discretionary
bonuses related to our performance totaling approximately $1.8 million for
certain members of our management.

   We have recorded non-cash compensation charges of $12.8 million related to
the issuance of stock options to certain employees and executives.  Such charges
are expected to amount to approximately $1.6 million per year through 2002 and
approximately $0.8 million in 2003.  See "--Compensation Charges Related to
Stock Option Grants".

   Depreciation and amortization for 1998 was $37.2 million, an increase of
$30.3 million from 1997.  This increase was primarily attributable to (1) a $9.5
million increase in depreciation and amortization related to the

                                       46
<PAGE>

property and equipment, goodwill and other intangible assets acquired in the
Crown Communication acquisition; and (2) $20.3 million of depreciation and
amortization related to the property and equipment and goodwill from CCUK.

   The equity in earnings (losses) of unconsolidated affiliate represents our
34.3% share of CCUK's net earnings (losses) for the periods from March 1997
through August 1998, at which time the share exchange with CCUK's shareholders
was completed.  For the period from March through December 1997, after making
appropriate adjustments to CCUK's results of operations for such period to
conform to generally accepted accounting principles of the United States, CCUK
had net revenues, operating income, interest expense (including amortization of
deferred financing costs) and net losses of $103.5 million, $16.5 million, $20.4
million and $3.3 million, respectively.

   Interest and other income for 1997 includes a $1.2 million fee received in
March 1997 as compensation for leading the investment consortium which provided
the equity financing for CCUK. Interest income for 1998 resulted primarily from
(1) the investment of excess proceeds from the sale of the 10 5/8% discount
notes in November 1997; and (2) the investment of the net proceeds from the
initial public offering in August 1998. See "--Liquidity and Capital Resources".

   Interest expense and amortization of deferred financing costs for 1998 was
$29.1 million, an increase of $19.8 million, or 214.3%, from 1997.  This
increase was primarily attributable to amortization of the original issue
discount on the 10 5/8% discount notes and interest on CCUK's indebtedness.

   Minority interests represent the minority shareholder's 20% interest in
CCUK's operations.

LIQUIDITY AND CAPITAL RESOURCES

   Our business strategy contemplates substantial capital expenditures:

   (1) in connection with the expansion of our tower portfolios by partnering
       with wireless carriers to assume ownership or control of their existing
       towers, by pursuing build-to-suit opportunities, and by pursuing other
       tower acquisition opportunities, and

   (2) to acquire existing transmission networks globally as opportunities
       arise.


   Since its inception, CCIC has generally funded its activities, other than
acquisitions and investments, through excess proceeds from contributions of
equity capital and cash provided by operations.  CCIC has financed acquisitions
and investments with the proceeds from equity contributions, borrowings under
our senior credit facilities, issuances of debt securities and the issuance of
promissory notes to sellers.  Since its inception, CCUK has generally funded its
activities, other than the acquisition of the BBC home service transmission
business, through cash provided by operations and borrowings under CCUK's credit
facility.  CCUK financed the acquisition of the BBC home service transmission
business with the proceeds from equity contributions and the issuance of the
CCUK bonds.

   For the years ended December 31, 1997, 1998 and 1999, our net cash provided
by (used for) operating activities was ($0.6 million), $45.0 million and $92.6
million, respectively.  For the years ended December 31, 1997, 1998 and 1999,
our net cash provided by financing activities was $159.8 million, $345.2 million
and $1,670.4 million, respectively.  Our primary financing-related activities in
1999 and the first quarter of 2000 included the following:

   May Offerings
   On May 12, 1999, we completed public offerings of debt and equity securities.
We sold (1) 21,000,000 shares of our common stock at a price of $17.50 per share
and received proceeds of $352.8 million (after

                                       47
<PAGE>

underwriting discounts of $14.7 million), (2) $500.0 million aggregate principal
amount at maturity of our 10 3/8% discount notes for proceeds of $292.6 million
(net of original issue discount of $198.3 million and after underwriting
discounts of $9.1 million), and (3) $180.0 million aggregate principle amount of
our 9% senior notes for proceeds of $174.6 million (after underwriting discounts
of $5.4 million). We had granted the underwriters for the offerings an over-
allotment option to purchase an additional 3,150,000 shares of our common stock.
On May 13, 1999, the underwriters exercised this over-allotment option in full.
As a result, we received additional proceeds of $52.9 million (after
underwriting discounts of $2.2 million). A portion of the proceeds from these
offerings was used to repay amounts drawn under the term loans in connection
with the BellSouth and Powertel transactions. The remaining proceeds will be
used to pay the remaining purchase price for the BellSouth and Powertel
transactions, to fund our initial interest payments on the 9% senior notes and
for general corporate purposes.

   Sales of Common Stock to TdF
   On June 15, 1999, we sold shares of our common stock to a subsidiary of TdF
pursuant to TdF's preemptive rights related to two recent acquisitions.  We sold
5,395,539 shares at $12.63 per share and 125,066 shares at $13.00 per share.
The aggregate proceeds of approximately $69.8 million will be used for general
corporate purposes.  On July 20, 1999, we sold shares of our common stock to a
subsidiary of TdF pursuant to TdF's preemptive rights related to the May
offerings.  We sold 8,351,791 shares at $16.80 per share.  The aggregate
proceeds of approximately $140.3 million will be used for general corporate
purposes.

   July Offerings
   On July 27, 1999, we sold debt securities in a private placement.  We sold
(1) $260.0 million aggregate principal amount at maturity of our 11 1/4%
discount notes for proceeds of $147.5 million (net of original issue discount of
$109.5 million and after underwriting discounts of $3.0 million) and (2) $125.0
million aggregate principle amount of our 9 1/2% senior notes for proceeds of
$122.5 million (after underwriting discounts of $2.5 million).  The proceeds
from the sale of these securities will be used to pay the remaining purchase
price for the BellSouth DCS transaction, to fund our initial interest payments
on the 9 1/2% senior notes and for general corporate purposes.

   Sale of Preferred Stock to GECC
   On November 19, 1999, we issued 200,000 shares of our 8 1/4% convertible
preferred stock at a price of $1,000 per share (the liquidation preference per
share) to GECC.  We received net proceeds of approximately $191.5 million (after
structuring and underwriting fees of $8.5 million but before other expenses of
the transaction).  The net proceeds will be used to pay a portion of the
purchase price for the GTE joint venture. GECC also received warrants to
purchase 1.0 million shares of our common stock at an exercise price of $26.875
per share.  The warrants are exercisable, in whole or in part, at any time for a
period of five years following the issue date.

   2000 Credit Facility
   In March 2000, a subsidiary of CCIC entered into a credit agreement with a
syndicate of banks which consists of two term loan facilities and a revolving
line of credit aggregating $1,200.0 million.  Available borrowings under the
2000 credit facility are generally to be used for the construction and purchase
of towers and for general corporate purposes of CCUSA, Crown Castle GT and CCAL.
The amount of available borrowings will be determined based on the current
financial performance (as defined) of those subsidiaries' assets.  In addition,
up to $25.0 million of borrowing availability under the 2000 credit facility can
be used for letters of credit.  On March 15, 2000, we used $83.4 million in
borrowings under the 2000 credit facility to repay outstanding borrowings and
accrued interest under the Crown Communication senior credit facility.  The net
proceeds from $316.6 million in additional borrowings will be used to fund a
portion of the purchase price for the GTE joint venture and for general
corporate purposes. In the first quarter of 2000, Crown Communication will
record an extraordinary loss of approximately $1.7 million consisting of the
write-off of unamortized deferred financing costs related to the senior credit
facility.

                                       48
<PAGE>

   Capital expenditures were $293.8 million for the year ended December 31,
1999, of which $1.0 million were for CCIC, $119.0 million were for CCUSA, $23.3
million were for Crown Atlantic and $150.5 million were for CCUK. We anticipate
that we will build, through the end of 2000, approximately 900 towers in the
United States at a cost of approximately $225.0 million and approximately 270
towers in the United Kingdom at a cost of approximately $45.0 million. We also
expect that the capital expenditure requirements related to the roll-out of
digital broadcast transmission in the United Kingdom will be approximately
(Pounds)17.5 million ($28.0 million).

   In addition to capital expenditures in connection with build-to-suits, we
expect to apply a significant amount of capital to finance the remaining cash
portion of the consideration being paid in connection with the recent and
agreed to transactions discussed below.

   In connection with the Bell Atlantic joint venture, we issued approximately
15.6 million shares of our common stock and contributed $250.0 million in cash
to the joint venture.  The joint venture borrowed approximately $180.0 million
under the Crown Atlantic credit facility, following which the joint venture made
a $380.0 million cash distribution to Bell Atlantic.

   In connection with the BellSouth transaction, through February 2, 2000, we
have issued approximately 8.2 million shares of our common stock and paid
BellSouth $390.6 million in cash. We expect to (1) issue an additional 0.9
million shares of our common stock and (2) use a portion of the net proceeds
from our recent offerings to finance the remaining $39.4 million cash purchase
price for this transaction.

   In connection with the Powertel acquisition, we paid Powertel $275.0 million
in cash.

   In connection with the BellSouth DCS transaction, through February 2, 2000,
we have paid BellSouth DCS $277.5 million in cash.  We expect to use a portion
of the net proceeds from our recent offerings to finance the remaining $39.4
million cash purchase price for this transaction.

   On November 7, 1999, we entered into an agreement with GTE to form a joint
venture to own and operate a significant majority of GTE's towers.  Upon
formation of the GTE joint venture (which will occur in multiple closings during
2000), (1) we will contribute approximately $825.0 million (of which up to
$100.0 million can be in shares of our common stock, with the balance in cash)
in exchange for a majority ownership interest in the joint venture, and (2) GTE
will contribute approximately 2,300 towers in exchange for a cash distribution
of approximately $800.0 million (less any amount contributed in the form of our
common stock) from the joint venture and a minority ownership interest in the
joint venture.  Upon dissolution of the joint venture, GTE would receive (1) any
shares of our common stock contributed to the joint venture and (2) a payment
equal to approximately 11.4% of the fair market value of the joint venture's
other net assets; we would then receive the remaining assets and liabilities of
the joint venture.  We will account for our investment in the GTE joint venture
as a purchase of tower assets, and will include the joint venture's results of
operations and cash flows in our consolidated financial statements for periods
subsequent to formation.  Upon entering into this agreement, we placed $50.0
million into an escrow account; such funds would be forfeited if we failed to
close this transaction because we were unable to obtain adequate financing.  On
January 31, 2000, the formation of the GTE joint venture took place with the
first closing of towers.  We contributed $223.9 million in cash to the joint
venture, and GTE contributed 637 towers in exchange for a cash distribution of
$198.9 million from the joint venture. We expect to use borrowings under our
2000 credit facility to finance most of the remaining $601.1 million purchase
price for this transaction.

   In March 2000, CCAL (our 66.7% owned subsidiary) entered into an agreement to
purchase approximately 700 towers in Australia from Cable & Wireless Optus. The
total purchase price for the towers will be approximately $135.0 million in cash
(Australian $220.0 million), and the purchase is expected to close in the second
quarter of 2000. We will account for our investment in CCAL as a purchase of
tower assets, and will include CCAL's results of operations and cash flows

                                       49
<PAGE>

in our consolidated financial statements for periods subsequent to the purchase
date. We expect to use borrowings under our 2000 credit facility to finance the
cash purchase price for this transaction.

   We expect that the completion of the recent and agreed to transactions and
the execution of our new tower build, or build-to-suit program, will have a
material impact on our liquidity. We expect that once integrated, these
transactions will have a positive impact on liquidity, but will require some
period of time to offset the initial adverse impact on liquidity. In addition,
we believe that as new towers become operational and we begin to add tenants,
they should result in a long-term increase in liquidity.

   Our liquidity may also be materially impacted if we fail to complete the GTE
joint venture transaction. We expect to finance most of the purchase price for
this transaction with borrowings under the 2000 credit facility, and we are
currently investigating various financing alternatives for the remaining amount.
There can be no assurance, however, that we will be able to obtain any such
financing, and we may be forced to forego a portion of the towers included in
this transaction. If that were to occur, we would likely be forced to forfeit
all or part of the related escrow payment. If we were to fail to complete this
transaction and forfeit all or any significant portion of the $50.0 million
escrow payment made in connection with the transaction, it would have a material
adverse effect on our financial condition, including our ability to implement
our current business strategy. See "Item 1. Business--Risk Factors--We May Not
Complete the Agreed To Transactions".

   To fund the execution of our business strategy, including the recent and
agreed to transactions described above and the construction of new towers that
we have agreed to build, we expect to use the net proceeds of our recent
offerings and borrowings available under our U.S. and U.K. credit facilities. We
will have additional cash needs to fund our operations in the future. We may
also have additional cash needs in the near term if additional tower
acquisitions or build-to-suit opportunities arise. Some of the opportunities
that we are currently pursuing could require significant additional capital. If
we do not otherwise have cash available, or borrowings under our credit
facilities have otherwise been utilized, when our cash need arises, we would be
forced to seek additional debt or equity financing or to forego the opportunity.
In the event we determine to seek additional debt or equity financing, there can
be no assurance that any such financing will be available, on commercially
acceptable terms or at all, or permitted by the terms of our existing
indebtedness. We expect to raise additional funds in the near term with bank
loans, debt or equity financing.

   As of December 31, 1999, we had consolidated cash and cash equivalents of
$549.3 million (including $14.6 million at CCUK and $40.0 million at Crown
Atlantic), consolidated long-term debt of $1,542.3 million, consolidated
redeemable preferred stock of $422.9 million and consolidated stockholders'
equity of $1,617.7 million.

   As of March 1, 2000, Crown Atlantic had unused borrowing availability under
its credit facility of approximately $70.0 million, and CCUK had unused
borrowing availability under its credit facility of approximately (Pounds)65.0
million ($102.6 million).  As of March 15, 2000, our subsidiaries had
approximately $100.0 million of unused borrowing availability under the 2000
credit facility.  Our various credit facilities require our subsidiaries to
maintain certain financial covenants and place restrictions on the ability of
our subsidiaries to, among other things, incur debt and liens, pay dividends,
make capital expenditures, undertake transactions with affiliates and make
investments.  These facilities also limit the ability of the borrowing
subsidiaries to pay dividends to CCIC.

   If we are unable to refinance our subsidiary debt or renegotiate the terms of
such debt, we may not be able to meet our debt service requirements, including
interest payments on the notes, in the future. Our 9% senior notes and our 9
1/2% senior notes will require annual cash interest payments of approximately
$16.2 million and $11.9 million, respectively. Prior to November 15, 2002, May
15, 2004 and August 1, 2004, the interest expense on our 10 3/8% discount notes,
our 10 5/8% discount notes and our 11 1/4% discount notes, respectively, will be
comprised solely of the amortization of original issue discount. Thereafter, the
10 5/8% discount notes, the 10 3/8% discount notes and the 11 1/4% discount
notes will require annual cash interest payments of

                                       50
<PAGE>

approximately $26.7 million, $51.9 million and $29.3 million, respectively.
Prior to December 15, 2003, we do not expect to pay cash dividends on our
exchangeable preferred stock or, if issued, cash interest on the exchange
debentures. Thereafter, assuming all dividends or interest have been paid-in-
kind, our exchangeable preferred stock or, if issued, the exchange debentures
will require annual cash dividend or interest payments of approximately $47.8
million. Annual cash interest payments on the CCUK bonds are (Pounds)11.25
million ($18.2 million). In addition, our various credit facilities will require
periodic interest payments on amounts borrowed thereunder.

   As a holding company, CCIC will require distributions or dividends from its
subsidiaries, or will be forced to use capital raised in debt and equity
offerings, to fund its debt obligations, including interest payments on the
cash-pay notes and eventually the 10 5/8% discount notes, the 10 3/8% discount
notes and the 11 1/4% discount notes. The terms of the indebtedness of our
subsidiaries significantly limit their ability to distribute cash to CCIC. As a
result, we will be required to apply a portion of the net proceeds from the
recent debt offerings to fund interest payments on the cash-pay notes. If we do
not retain sufficient funds from the offerings or any future financing, we may
not be able to make our interest payments on the cash-pay notes.

   Our ability to make scheduled payments of principal of, or to pay interest
on, our debt obligations, and our ability to refinance any such debt
obligations, will depend on our future performance, which, to a certain extent,
is subject to general economic, financial, competitive, legislative, regulatory
and other factors that are beyond our control.  We anticipate that we may need
to refinance all or a portion of our indebtedness on or prior to its scheduled
maturity.  There can be no assurance that we will be able to effect any required
refinancings of our indebtedness on commercially reasonable terms or at all.
See "Item 1. Business--Risk Factors".

REPORTING REQUIREMENTS UNDER THE INDENTURES GOVERNING THE COMPANY'S DEBT
 SECURITIES AND THE CERTIFICATE OF DESIGNATIONS GOVERNING THE COMPANY'S 12 3/4%
 SENIOR EXCHANGEABLE PREFERRED STOCK (THE "CERTIFICATE")

   The following information (as such capitalized terms are defined in the
Indentures and the Certificate) is presented solely as a requirement of the
Indentures and the Certificate; such information is not intended as an
alternative measure of financial position, operating results or cash flow from
operations (as determined in accordance with generally accepted accounting
principles).  Furthermore, our measure of the following information may not be
comparable to similarly titled measures of other companies.

   Upon consummation of the share exchange with CCUK's shareholders, which
increased our ownership interest in CCUK to 80%, we designated CCUK as an
Unrestricted Subsidiary.  In addition, we designated Crown Atlantic as an
Unrestricted Subsidiary.  Prior to these transactions, we did not have any
Unrestricted Subsidiaries.  Summarized financial information for (1) CCIC and
our Restricted Subsidiaries; and (2) our Unrestricted Subsidiaries is as
follows:

                                       51
<PAGE>

<TABLE>
<CAPTION>
                                                                    December 31, 1999
                                               -----------------------------------------------------------
                                               Company and
                                                Restricted       Unrestricted   Consolidation    Consolidated
                                               Subsidiaries       Subsidiaries    Eliminations      Total
                                               ------------      -------------   ------------   ------------
                                                                (In thousands of dollars)
<S>                                            <C>            <C>            <C>              <C>
Cash and cash equivalents....................    $  494,724     $   54,604       $      --      $  549,328
Other current assets.........................        59,106         53,611              --         112,717
Property and equipment, net..................     1,350,610      1,117,491              --       2,468,101
Escrow deposit for acquisition...............        50,000             --              --          50,000
Investments in Unrestricted Subsidiaries.....       991,261             --        (991,261)             --
Goodwill and other intangible assets, net....       132,553        463,594              --         596,147
Other assets, net............................        48,578         11,779              --          60,357
                                                 ----------     ----------       ---------      ----------
                                                 $3,126,832     $1,701,079       $(991,261)     $3,836,650
                                                 ==========     ==========       =========      ==========

Current liabilities..........................    $   49,905     $   81,376       $      --      $  131,281
Long-term debt...............................     1,033,188        509,155              --       1,542,343
Other liabilities............................         3,069         63,995              --          67,064
Minority interests...........................            --         55,292              --          55,292
Redeemable preferred stock...................       422,923             --              --         422,923
Stockholders' equity.........................     1,617,747        991,261        (991,261)      1,617,747
                                                 ----------     ----------       ---------      ----------
                                                 $3,126,832     $1,701,079       $(991,261)     $3,836,650
                                                 ==========     ==========       =========      ==========
</TABLE>

<TABLE>
<CAPTION>

                                    Three Months Ended December 31, 1999                    Year Ended December 31, 1999
                                ---------------------------------------------   ----------------------------------------------------
                                   Company                                         Company
                                     and                                             and
                                 Restricted     Unrestricted    Consolidated     Restricted     Unrestricted        Consolidated
                                Subsidiaries    Subsidiaries        Total       Subsidiaries    Subsidiaries           Total
                                -------------   -------------   -------------   -------------   -------------   --------------------
                                                                     (In thousands of dollars)
<S>                             <C>             <C>             <C>             <C>             <C>             <C>
Net revenues......................  $ 40,694        $ 73,502        $114,196        $104,177        $241,582              $ 345,759
Costs of operations (exclusive of
 depreciation and amortization)...    17,327          34,534          51,861          42,737         114,011                156,748
General and administrative........    10,578           3,169          13,747          33,052          10,771                 43,823
Corporate development.............     1,181              88           1,269           4,584             819                  5,403
Restructuring charges.............     3,831              --           3,831           5,645              --                  5,645
Non-cash compensation charges.....       340             161             501           1,404             769                  2,173
Depreciation and amortization.....    16,251          24,486          40,737          42,354          87,752                130,106
                                    --------        --------        --------        --------        --------              ---------
Operating income (loss)...........    (8,814)         11,064           2,250         (25,599)         27,460                  1,861
Interest and other income
 (expense)........................     4,339             590           4,929           9,934           7,797                 17,731
Interest expense and amortization
of deferred financing costs.......   (25,891)        (12,669)        (38,560)        (70,341)        (40,567)              (110,908)
Provision for income taxes........        (7)             --              (7)           (275)             --                   (275)
Minority interests................        --          (1,569)         (1,569)             --          (2,756)                (2,756)
Cumulative effect of change in
 accounting principle for costs of
 start-up activities..............        --              --              --          (2,414)             --                 (2,414)
                                    --------        --------        --------        --------        --------              ---------
Net loss..........................  $(30,373)       $ (2,584)       $(32,957)       $(88,695)       $ (8,066)             $ (96,761)
                                    ========        ========        ========        ========        ========              =========
</TABLE>

   Tower Cash Flow and Adjusted Consolidated Cash Flow for the Company and its
Restricted Subsidiaries is as follows under (1) the indenture governing the
10 5/8% Discount Notes and the Certificate (the "1997 and

                                       52
<PAGE>

1998 Securities") and (2) the indentures governing the 10 3/8% Discount Notes,
the 9% Notes, the 11 1/4% Discount Notes and the 9 1/2% Notes (the "1999
Securities"):

<TABLE>
<CAPTION>
                                                                               1997 and 1998       1999
                                                                                 Securities     Securities
                                                                               --------------   -----------
                                                                                (In thousands of dollars)
                                                                                       (Unaudited)
<S>                                                                            <C>              <C>
Tower Cash Flow, for the three months ended December 31, 1999...................    $ 12,339      $ 12,339
                                                                                    ========      ========
Consolidated Cash Flow, for the twelve months ended December 31, 1999...........    $ 23,804      $ 28,388
Less: Tower Cash Flow, for the twelve months ended December 31, 1999............     (33,022)      (33,022)
Plus: four times Tower Cash Flow, for the three months ended December 31,
 1999...........................................................................      49,356        49,356
                                                                                     --------      --------
Adjusted Consolidated Cash Flow, for the twelve months ended December 31,
 1999...........................................................................    $ 40,138      $ 44,722
                                                                                    ========      ========
</TABLE>

COMPENSATION CHARGES RELATED TO STOCK OPTION GRANTS

   During the period from April 24, 1998 through July 15, 1998, we granted
options to employees and executives for the purchase of 3,236,980 shares of our
common stock at an exercise price of $7.50 per share. Of such options, options
for 1,810,730 shares vested upon consummation of the IPO and the remaining
options for 1,426,250 shares will vest at 20% per year over five years,
beginning one year from the date of grant. In addition, we have assigned our
right to repurchase shares of our common stock from a stockholder (at a price of
$6.26 per share) to two individuals (including a newly-elected director) with
respect to 100,000 of such shares. Since the granting of these options and the
assignment of these rights to repurchase shares occurred subsequent to the date
of the share exchange agreement with CCUK's shareholders and at prices
substantially below the price to the public in the IPO, we have recorded a non-
cash compensation charge related to these options and shares based upon the
difference between the respective exercise and purchase prices and the price to
the public in the IPO. Such compensation charge will total approximately $18.4
million, of which approximately $10.6 million was recognized upon consummation
of the IPO (for such options and shares which vested upon consummation of the
IPO), and the remaining $7.8 million is being recognized over five years
(approximately $1.6 million per year) through the second quarter of 2003. An
additional $1.6 million in non-cash compensation charges will be recognized
through the third quarter of 2001 for stock options issued to certain members of
CCUK's management prior to the consummation of the share exchange.

IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS

   In April 1998, the Accounting Standards Executive Committee of the American
Institute of Certified Public Accountants issued Statement of Position 98-5,
Reporting on the Costs of Start-Up Activities ("SOP 98-5"). SOP 98-5 requires
that costs of start-up activities be charged to expense as incurred and broadly
defines such costs.  We have deferred certain costs incurred in connection with
potential business initiatives and new geographic markets, and SOP 98-5 requires
that such deferred costs be charged to results of operations upon its adoption.
SOP 98-5 is effective for fiscal years beginning after December 15, 1998.  We
have adopted the requirements of SOP 98-5 as of January 1, 1999.  The cumulative
effect of the change in accounting principle for the adoption of SOP 98-5
resulted in a charge to results of operations for $2.4 million in our financial
statements for the three months ended March 31, 1999.

   In June 1998, the Financial Accounting Standards Board (the "FASB") issued
Statement of Financial Accounting Standards No. 133, Accounting for Derivative
Instruments and Hedging Activities ("SFAS 133"). SFAS 133 requires that
derivative instruments be recognized as either assets or liabilities in the
consolidated balance sheet based on their fair values.  Changes in the fair
values of such derivative instruments will be recorded either in results of
operations or in other comprehensive income, depending on the intended use of
the derivative instrument.  The initial application of SFAS 133 will be reported
as the effect of a change in accounting principle.  SFAS 133, as amended, is
effective for all fiscal quarters of fiscal years beginning after June 15, 2000.
We will adopt the requirements of SFAS 133 in our financial statements for the
three months

                                       53
<PAGE>

ending March 31, 2001. We have not yet determined the effect that the adoption
of SFAS 133 will have on our consolidated financial statements.

YEAR 2000 COMPLIANCE

   The year 2000 problem is the result of computer programs having been written
using two digits (rather than four) to define the applicable year.  Any of our
computer programs that have date-sensitive software might have recognized a date
using "00" as 1900 rather than the year 2000, or might not have recognized the
date at all. This could have resulted in a system failure or miscalculations
causing disruption of operations including, among other things, a temporary
inability to process transactions, send invoices, or engage in similar normal
business activities.

   In 1997 we established a year 2000 project to ensure that the issue received
appropriate priority and that necessary resources were made available.  This
project included the replacement of our worldwide business computer systems with
systems that use programs primarily from J.D. Edwards, Inc.  The new systems
made approximately 90% of our business computer systems year 2000 compliant and
are in production today. Remaining business software programs, including those
supplied by vendors, were made year 2000 compliant through the year 2000 project
or they were retired.  None of our other information technology projects were
delayed due to the implementation of the year 2000 project.

   Our year 2000 project was divided into the following phases: (1) inventorying
year 2000 items; (2) assigning priorities to identified items; (3) assessing the
year 2000 compliance of items determined to be material to us; (4) repairing or
replacing material items that are determined not to be year 2000 compliant; (5)
testing material items; and (6) designing and implementing contingency and
business continuation plans for each organization and company location.  We
completed all such phases prior to the end of 1999.  All critical broadcast
equipment and non-information technology related equipment was tested and was
either year 2000 compliant or was designated as year 2000 ready.  A year 2000
ready designation implies the equipment or system will function without adverse
effects beyond year 2000 but may not be aware of the century.  All critical
information technology systems were designated year 2000 compliant or were
retired or remediated by the end of 1999.

   We expended approximately $7.6 million on the year 2000 project through
December 31, 1999, of which approximately $6.8 million related to the
implementation of the J.D. Edwards Systems and related hardware.

   The failure to correct a material year 2000 problem could have resulted in an
interruption in, or a failure of, certain normal business activities or
operations.  However, we believe that our efforts to ensure year 2000 compliance
have been successful.  To date, we have not suffered any significant year 2000
problems, but we continue to monitor our various computer systems.

ITEM 7A. QUALITATIVE AND QUANTITATIVE DISCLOSURES ABOUT MARKET RISK

   As a result of our international operating, investing and financing
activities, we are exposed to market risks, which include changes in foreign
currency exchange rates and interest rates which may adversely affect our
results of operations and financial position.  In seeking to minimize the risks
and/or costs associated with such activities, we manage exposure to changes in
interest rates and foreign currency exchange rates.

   Certain financial instruments used to obtain capital are subject to market
risks from fluctuations in market rates.  The majority of our financial
instruments, however, are long-term fixed interest rate notes and debentures.
Therefore, fluctuations in market interest rates of 1% in 2000 would not have a
material effect on our consolidated financial results.

                                       54
<PAGE>

   The majority of our foreign currency transactions are denominated in the
British pound sterling, which is the functional currency of CCUK.  As CCUK's
transactions are denominated and settled in the functional currency, risks
associated with currency fluctuations are minimized to foreign currency
translation adjustments. We do not currently hedge against foreign currency
translation risks and believe that foreign currency exchange risk is not
significant to our operations.

                                       55
<PAGE>

ITEM 8.     FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES
                  INDEX TO CONSOLIDATED FINANCIAL STATEMENTS


<TABLE>
<CAPTION>
                                                                                                        PAGE
                                                                                                        ----
<S>                                                                                                     <C>
Report of KPMG LLP, Independent Auditors...............................................................   57
Consolidated Balance Sheet as of December 31, 1998 and 1999............................................   58
Consolidated Statement of Operations and Comprehensive Loss for each of the three years in the
 period ended December 31, 1999........................................................................   59
Consolidated Statement of Cash Flows for each of the three years in the period ended December 31,
 1999..................................................................................................   60
Consolidated Statement of Stockholders' Equity (Deficit) for each of the three years in the period
 ended December 31, 1999...............................................................................   61
Notes to Consolidated Financial Statements............................................................    62

</TABLE>

                                       56
<PAGE>

                          INDEPENDENT AUDITORS' REPORT


To the Board of Directors and Stockholders of
 Crown Castle International Corp.:

   We have audited the accompanying consolidated balance sheets of Crown Castle
International Corp. and subsidiaries as of December 31, 1998 and 1999, and the
related consolidated statements of operations and comprehensive loss, cash flows
and stockholders' equity (deficit) for each of the years in the three-year
period ended December 31, 1999. These consolidated financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these consolidated financial statements based on our audits.

   We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

   In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Crown Castle
International Corp. and subsidiaries as of December 31, 1998 and 1999, and the
results of their operations and their cash flows for each of the years in the
three-year period ended December 31, 1999, in conformity with generally accepted
accounting principles.


                                          KPMG LLP


Houston, Texas
February 22, 2000

                                       57
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEET
                (IN THOUSANDS OF DOLLARS, EXCEPT SHARE AMOUNTS)


<TABLE>
<CAPTION>
                                                                                          December 31,
                                                                                   ---------------------------
                                                                                       1998           1999
                                                                                   ------------   ------------
<S>                                                                                <C>            <C>
ASSETS
Current assets:
 Cash and cash equivalents........................................................  $  296,450     $  549,328
 Receivables:
   Trade, net of allowance for doubtful accounts of $1,535 and $3,218 at
    December 31, 1998 and 1999, respectively......................................      32,130         74,290
   Other..........................................................................       4,290          4,327
 Inventories......................................................................       6,599         19,178
 Prepaid expenses and other current assets........................................       2,647         14,922
                                                                                    ----------     ----------
    Total current assets..........................................................     342,116        662,045
Property and equipment, net.......................................................     592,594      2,468,101
Escrow deposit for acquisition....................................................          --         50,000
Goodwill and other intangible assets, net of accumulated amortization of
 $20,419 and $53,437 at December 31, 1998 and 1999, respectively..................     569,740        596,147
Deferred financing costs and other assets, net of accumulated amortization of
 $1,722 and $4,245 at December 31, 1998 and 1999, respectively....................      18,780         60,357
                                                                                    ----------     ----------
                                                                                    $1,523,230     $3,836,650
                                                                                    ==========     ==========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
 Accounts payable.................................................................  $   46,020     $   45,998
 Accrued interest.................................................................      15,677         20,912
 Accrued compensation and related benefits........................................       5,188          4,005
 Deferred rental revenues and other accrued liabilities...........................      26,002         60,366
                                                                                    ----------     ----------
    Total current liabilities.....................................................      92,887        131,281
Long-term debt....................................................................     429,710      1,542,343
Other liabilities.................................................................      22,823         67,064
                                                                                    ----------     ----------
    Total liabilities.............................................................     545,420      1,740,688
                                                                                    ----------     ----------
Commitments and contingencies (Note 12)
Minority interests................................................................      39,185         55,292
Redeemable preferred stock........................................................     201,063        422,923
Stockholders' equity:
 Common stock, $.01 par value; 690,000,000 shares authorized:
   Common Stock; shares issued: December 31, 1998 - 83,123,873 and
    December 31, 1999 - 146,074,905...............................................         831          1,461
   Class A Common Stock; shares issued: 11,340,000................................         113            113
 Additional paid-in capital.......................................................     795,153      1,805,053
 Cumulative foreign currency translation adjustment...............................       1,690         (3,013)
 Accumulated deficit..............................................................     (60,225)      (185,867)
                                                                                    ----------     ----------
    Total stockholders' equity....................................................     737,562      1,617,747
                                                                                    ----------     ----------
                                                                                    $1,523,230     $3,836,650
                                                                                    ==========     ==========
</TABLE>

                See notes to consolidated financial statements.

                                       58
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

          CONSOLIDATED STATEMENT OF OPERATIONS AND COMPREHENSIVE LOSS
              (IN THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)


<TABLE>
<CAPTION>
                                                                              Years Ended December 31,
                                                                        -------------------------------------
                                                                           1997         1998         1999
                                                                        ----------   ----------   -----------
<S>                                                                     <C>          <C>          <C>
Net revenues:
 Site rental and broadcast transmission.........................         $ 11,010     $ 75,028     $ 267,894
 Network services and other.....................................           20,395       38,050        77,865
                                                                         --------     --------     ---------
                                                                           31,405      113,078       345,759
                                                                         --------     --------     ---------
Operating expenses:
 Costs of operations (exclusive of depreciation and amortization):
   Site rental and broadcast transmission.......................            2,213       26,254       114,436
   Network services and other...................................           13,137       21,564        42,312
 General and administrative.....................................            6,824       23,571        43,823
 Corporate development..........................................            5,731        4,625         5,403
 Restructuring charges..........................................               --           --         5,645
 Non-cash compensation charges..................................               --       12,758         2,173
 Depreciation and amortization..................................            6,952       37,239       130,106
                                                                         --------     --------     ---------
                                                                           34,857      126,011       343,898
                                                                         --------     --------     ---------
Operating income (loss).........................................           (3,452)     (12,933)        1,861

Other income (expense):
 Equity in earnings (losses) of unconsolidated affiliate........           (1,138)       2,055            --
 Interest and other income (expense)............................            1,951        4,220        17,731
 Interest expense and amortization of deferred financing costs..           (9,254)     (29,089)     (110,908)
                                                                         --------     --------     ---------
Loss before income taxes, minority interests and cumulative effect
  of change in accounting principle.............................          (11,893)     (35,747)      (91,316)
Provision for income taxes......................................              (49)        (374)         (275)
Minority interests..............................................               --       (1,654)       (2,756)
                                                                         --------     --------     ---------
Loss before cumulative effect of change in accounting principle.          (11,942)     (37,775)      (94,347)
Cumulative effect of change in accounting principle for costs of
 start-up activities............................................               --           --        (2,414)
                                                                          --------     --------     ---------
Net loss........................................................          (11,942)     (37,775)      (96,761)
Dividends on preferred stock....................................           (2,199)      (5,411)      (28,881)
                                                                         --------     --------     ---------
Net loss after deduction of dividends on preferred stock........         $(14,141)    $(43,186)    $(125,642)
                                                                         ========     ========     =========

Net loss........................................................         $(11,942)    $(37,775)    $ (96,761)
Other comprehensive income:
 Foreign currency translation adjustments.......................              562        1,128        (4,703)
                                                                         --------     --------     ---------
Comprehensive loss..............................................         $(11,380)    $(36,647)    $(101,464)
                                                                         ========     ========     =========

Per common share - basic and diluted:
 Loss before cumulative effect of change in accounting principle           $(2.27)      $(1.02)       $(0.94)
 Cumulative effect of change in accounting principle............               --           --         (0.02)
                                                                         --------     --------     ---------
 Net loss.......................................................           $(2.27)      $(1.02)       $(0.96)
                                                                         ========     ========     =========

Common shares outstanding - basic and diluted (in thousands)....            6,238       42,518       131,466
                                                                         ========     ========     =========
</TABLE>

                See notes to consolidated financial statements.

                                       59
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENT OF CASH FLOWS
                           (IN THOUSANDS OF DOLLARS)

<TABLE>
<CAPTION>
                                                                                            Years Ended December 31,
                                                                                     --------------------------------------
                                                                                        1997         1998          1999
                                                                                     ----------   ----------   ------------
<S>                                                                                  <C>          <C>          <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
 Net loss.........................................................................   $ (11,942)   $ (37,775)   $   (96,761)
 Adjustments to reconcile net loss to net cash provided by (used for) operating
  activities:
   Depreciation and amortization..................................................       6,952       37,239        130,106
   Amortization of deferred financing costs and discounts on long-term debt.......       2,159       17,910         49,937
   Minority interests.............................................................          --        1,654          2,756
   Cumulative effect of change in accounting principle............................          --           --          2,414
   Non-cash compensation charges..................................................          --       12,758          2,173
   Equity in losses (earnings) of unconsolidated affiliate........................       1,138       (2,055)            --
   Changes in assets and liabilities, excluding the effects of acquisitions:
    Increase (decrease) in deferred rental revenues and other liabilities.........        (240)       5,847         75,277
    Increase (decrease) in accrued interest.......................................        (396)       5,835          5,518
    Increase in accounts payable..................................................       1,824       15,373            889
    Decrease (increase) in receivables............................................       1,353       (7,450)       (42,913)
    Increase in inventories, prepaid expenses and other assets....................      (1,472)      (4,360)       (36,788)
                                                                                     ---------    ---------    -----------
      Net cash provided by (used for) operating activities........................        (624)      44,976         92,608
                                                                                     ---------    ---------    -----------
CASH FLOWS FROM INVESTING ACTIVITIES:
 Acquisitions of businesses, net of cash acquired.................................     (33,962)     (10,489)    (1,208,466)
 Capital expenditures.............................................................     (18,035)    (138,759)      (293,801)
 Investments in affiliates........................................................     (59,487)          --         (6,879)
                                                                                     ---------    ---------    -----------
      Net cash used for investing activities......................................    (111,484)    (149,248)    (1,509,146)
                                                                                     ---------    ---------    -----------
CASH FLOWS FROM FINANCING ACTIVITIES:
 Proceeds from issuance of capital stock..........................................     139,867      339,929        805,771
 Proceeds from issuance of long-term debt.........................................     150,010           --        757,206
 Net borrowings (payments) under revolving credit agreements......................      (6,223)       9,212        136,993
 Incurrence of financing costs....................................................      (7,798)      (3,010)       (28,330)
 Dividends on preferred stock.....................................................          --           --         (1,238)
 Purchase of capital stock........................................................      (2,132)        (883)            --
 Principal payments on long-term debt.............................................    (113,881)          --             --
                                                                                     ---------    ---------    -----------
      Net cash provided by financing activities...................................     159,843      345,248      1,670,402
                                                                                     ---------    ---------    -----------
EFFECT OF EXCHANGE RATE CHANGES ON CASH...........................................          --          396           (986)
                                                                                     ---------    ---------    -----------
NET INCREASE IN CASH AND CASH EQUIVALENTS.........................................      47,735      241,372        252,878
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR....................................       7,343       55,078        296,450
                                                                                     ---------    ---------    -----------
CASH AND CASH EQUIVALENTS AT END OF YEAR..........................................   $  55,078    $ 296,450    $   549,328
                                                                                     =========    =========    ===========
SUPPLEMENTARY SCHEDULE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
 Conversion of stockholder's Convertible Secured Subordinated Notes to Series A
  Convertible Preferred Stock.....................................................   $   3,657    $      --        $    --
 Amounts recorded in connection with acquisitions (see Note 2):
   Fair value of net assets acquired, including goodwill and other intangible
    assets........................................................................     197,235      431,453      1,750,506
   Escrow deposit for acquisition.................................................          --           --         50,000
   Issuance of common stock.......................................................      57,189      420,964        397,710
   Issuance of long-term debt.....................................................      78,102           --        180,000
   Minority interests.............................................................          --           --         14,330
   Assumption of long-term debt...................................................      27,982           --             --
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
 Interest paid....................................................................   $   7,533    $   6,276    $    54,514
 Income taxes paid................................................................          26          446            301
</TABLE>

                See notes to consolidated financial staements.

                                       60
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT)
                (IN THOUSANDS OF DOLLARS, EXCEPT SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                         Class A                 Class B
                                       Common Stock            Common Stock              Common Stock
                                   --------------------    --------------------      --------------------
                                     Shares    ($.01 Par)   Shares    ($.01 Par)       Shares    ($.01 Par)
                                   -----------   ------    ---------  ---------      ----------  ---------
<S>                                <C>           <C>      <C>           <C>       <C>            <C>
Balance, January 1, 1997.........   1,350,000    $   3     1,488,330      $  3             --      $   --
 Issuances of capital stock......          --       --     8,228,835        17             --          --
 Purchase of capital stock.......    (308,435)      (1)     (350,000)       (1)            --          --
 Foreign currency
  translation adjustments........          --       --            --        --             --          --
 Dividends on preferred stock....          --       --            --        --             --          --
 Net loss........................          --       --            --        --             --          --
                                   ----------    -----    ----------      ----    -----------      ------
Balance, December 31, 1997.......   1,041,565        2     9,367,165        19             --          --
 Conversion of preferred
  stock to Common Stock..........          --       --            --        --     38,517,865         385
 Conversion of Class A Common
  Stock and Class B Common Stock
  to Common Stock................  (1,041,565)      (2)   (9,367,165)      (19)    10,953,625         109
 Issuances of capital stock......          --       --            --        --     33,793,453         338
 Purchase of capital stock.......          --       --            --        --       (141,070)         (1)
 Non-cash compensation charges...          --       --            --        --             --          --
 Foreign currency translation
  adjustments....................          --       --            --        --             --          --
 Dividends on preferred stock....          --       --            --        --             --          --
 Net loss........................          --       --            --        --             --          --
                                   ----------    -----    ----------      ----    -----------      ------
Balance, December 31, 1998.......          --       --            --        --     83,123,873         831
 Issuances of capital stock
  and warrants...................          --       --            --        --     62,951,032         630
 Non-cash compensation charges...          --       --            --        --             --          --
 Foreign currency translation
  adjustments....................          --       --            --        --             --          --
 Dividends on preferred stock....          --       --            --        --             --          --
 Net loss........................          --       --            --        --             --          --
                                   ----------    -----    ----------      ----    -----------      ------
Balance, December 31, 1999.......          --    $  --            --      $ --    146,074,905      $1,461
                                   ==========    =====    ==========      ====    ===========      ======

                                                                           Cumulative
                                         Class A                            Foreign
                                       Common Stock          Additional     Currency
                                   --------------------       Paid-In      Translation    Accumulated
                                     Shares    ($.01 Par)     Capital      Adjustment       Deficit         Total
                                   ----------- -----------    -----------  -----------    -----------    -----------
<S>                                <C>          <C>       <C>             <C>           <C>            <C>
Balance, January 1, 1997.........          --     $ --      $      762       $    --      $    (978)     $     (210)
 Issuances of capital stock......          --       --          57,696            --             --          57,713
 Purchase of capital stock.......          --       --            (210)           --         (1,920)         (2,132)
 Foreign currency translation
  adjustments....................          --       --              --           562             --             562
 Dividends on preferred stock....          --       --              --            --         (2,199)         (2,199)
 Net loss........................          --       --              --            --        (11,942)        (11,942)
                                   ----------     ----      ----------       -------      ---------      ----------
Balance, December 31, 1997.......          --       --          58,248           562        (17,039)         41,792
 Conversion of preferred stock to
  Common Stock...................          --       --         164,712            --             --         165,097
 Conversion of Class A Common
  Stock and Class B Common Stock
  to Common Stock................          --       --             (88)           --             --              --
 Issuances of capital stock......  11,340,000      113         560,779            --             --         561,230
 Purchase of capital stock.......          --       --            (882)           --             --            (883)
 Non-cash compensation charges...          --       --          12,384            --             --          12,384
 Foreign currency translation
  adjustments....................          --       --              --         1,128             --           1,128
 Dividends on preferred stock....          --       --              --            --         (5,411)         (5,411)
 Net loss........................          --       --              --            --        (37,775)        (37,775)
                                   ----------     ----      ----------       -------      ---------      ----------
Balance, December 31, 1998.......  11,340,000      113         795,153         1,690        (60,225)        737,562
 Issuances of capital stock
  and warrants...................          --       --       1,007,947            --             --       1,008,577
 Non-cash compensation charges...          --       --           1,953            --             --           1,953
 Foreign currency translation
  adjustments....................          --       --              --        (4,703)            --          (4,703)
 Dividends on preferred stock....          --       --              --            --        (28,881)        (28,881)
 Net loss........................          --       --              --            --        (96,761)        (96,761)
                                   ----------     ----      ----------       -------      ---------      ----------
Balance, December 31, 1999.......  11,340,000     $113      $1,805,053       $(3,013)     $(185,867)     $1,617,747
                                   ==========     ====      ==========       =======      =========      ==========
</TABLE>

                See notes to consolidated financial statements.

                                       61
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


1.    BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

 BASIS OF PRESENTATION

   The consolidated financial statements include the accounts of Crown Castle
International Corp. ("CCIC") and its majority and wholly owned subsidiaries,
collectively referred to herein as the "Company".  All significant intercompany
balances and transactions have been eliminated in consolidation.  Certain
reclassifications have been made to the prior year's financial statements to be
consistent with the presentation in the current year.

   The Company owns, operates and manages wireless communications sites and
broadcast transmission networks. The Company also provides complementary
services to its customers, including network design, radio frequency
engineering, site acquisition, site development and construction, antenna
installation and network management and maintenance. The Company's
communications sites are located throughout the United States, in Puerto Rico
and in the United Kingdom. In the United States and Puerto Rico, the Company's
primary business is the leasing of antenna space to wireless operators under
long-term contracts. In the United Kingdom, the Company's primary businesses are
the operation of television and radio broadcast transmission networks and the
leasing of antenna space to wireless operators in the United Kingdom.

   The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts of assets and liabilities, the disclosure of
contingent assets and liabilities as of the date of the financial statements,
and the reported amounts of revenues and expenses during the reporting period.
Actual results could differ from those estimates.

 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

   Cash Equivalents
   Cash equivalents consist of highly liquid investments with original
maturities of three months or less.

   Inventories
   Inventories are stated at the lower of cost or market.  Cost is determined
using the first-in, first-out (FIFO) method.

   Property and Equipment

   Property and equipment is stated at cost, net of accumulated depreciation.
Depreciation is computed utilizing the straight-line method at rates based upon
the estimated useful lives of the various classes of assets. Additions, renewals
and improvements are capitalized, while maintenance and repairs are expensed.
Upon the sale or retirement of an asset, the related cost and accumulated
depreciation are removed from the accounts and any gain or loss is recognized.
The carrying  value of property and equipment and other long-lived assets will
be reviewed for impairment whenever events or changes in circumstances indicate
that the carrying amount of the assets may not be recoverable.  If the sum of
the estimated future cash flows (undiscounted) expected to result from the use
and eventual disposition of an asset is less than the carrying amount of the
asset, an impairment loss is recognized.  Measurement of an impairment loss is
based on the fair value of the asset.

   Goodwill and Other Intangible Assets
   Goodwill and other intangible assets represents the excess of the purchase
price for an acquired business over the allocated value of the related net
assets (see Note 2).  Goodwill is amortized on a straight-line basis

                                       62
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

over a 20 year life. Other intangible assets (principally the value of existing
site rental contracts at Crown Communications) are amortized on a straight-line
basis over a 10 year life. The carrying value of goodwill and other intangible
assets will be reviewed for impairment whenever events or changes in
circumstances indicate that the carrying amount of the acquired assets may not
be recoverable. If the sum of the estimated future cash flows (undiscounted)
expected to result from the use and eventual disposition of an asset is less
than the carrying amount of the asset, an impairment loss is recognized.
Measurement of an impairment loss is based on the fair value of the asset.

   Deferred Financing Costs
   Costs incurred to obtain financing are deferred and amortized over the
estimated term of the related borrowing.

   Revenue Recognition
   Site rental revenues are recognized on a monthly basis under lease or
management agreements with terms ranging from 12 months to 25 years.  Broadcast
transmission revenues are recognized on a monthly basis under transmission
contracts with terms ranging from 8 years to 12 years.

   Network services revenues from site development, construction and antennae
installation activities are recognized under a method which approximates the
completed contract method.  This method is used because these services are
typically completed in three months or less and financial position and results
of operations do not vary significantly from those which would result from use
of the percentage-of-completion method. These services are considered complete
when the terms and conditions of the contract or agreement have been
substantially completed.  Costs and revenues associated with installations not
complete at the end of a period are deferred and recognized when the
installation becomes operational.  Any losses on contracts are recognized at
such time as they become known.

   Network services revenues from design, engineering, site acquisition, and
network management and maintenance activities are recognized under service
contracts with customers which provide for billings on a time and materials,
cost plus profit, or fixed price basis.  Such contracts typically have terms
from six months to two years.  Revenues are recognized as services are performed
with respect to the time and materials contracts.  Revenues are recognized using
the percentage-of-completion method for cost plus profit and fixed price
contracts, measured by the percentage of contract costs incurred to date
compared to estimated total contract costs.  Provisions for estimated losses on
uncompleted contracts are made in the period in which such losses are
determined.

   Corporate Development Expenses
   Corporate development expenses represent costs incurred in connection with
acquisitions and development of new business initiatives.

   Income Taxes
   The Company accounts for income taxes using an asset and liability approach,
which requires the recognition of deferred income tax assets and liabilities for
the expected future tax consequences of events that have been recognized in the
Company's financial statements or tax returns.  Deferred income tax assets and
liabilities are determined based on the temporary differences between the
financial statement and tax bases of assets and liabilities using enacted tax
rates.

                                       63
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   Per Share Information

   Per share information is based on the weighted-average number of common
shares outstanding during each period for the basic computation and, if
dilutive, the weighted-average number of potential common shares resulting from
the assumed conversion of outstanding stock options, warrants and convertible
preferred stock for the diluted computation.

   A reconciliation of the numerators and denominators of the basic and diluted
per share computations is as follows:
<TABLE>
<CAPTION>
                                                                           Years Ended December 31,
                                                                     -------------------------------------
                                                                        1997         1998         1999
                                                                     ----------   ----------   -----------
<S>                                                                  <C>          <C>          <C>
                                                                          (In thousands of dollars,
                                                                          except per share amounts)
Loss before cumulative effect of change in accounting principle.      $(11,942)    $(37,775)    $ (94,347)
Dividends on preferred stock....................................        (2,199)      (5,411)      (28,881)
                                                                      --------     --------     ---------
Loss before cumulative effect of change in accounting principle
 applicable to common stock for basic and diluted
 computations...................................................       (14,141)     (43,186)     (123,228)
Cumulative effect of change in accounting principle.............            --           --        (2,414)
                                                                      --------     --------     ---------
Net loss applicable to common stock for basic and diluted
 computations...................................................      $(14,141)    $(43,186)    $(125,642)
                                                                      ========     ========     =========
Weighted-average number of common shares outstanding during
 the period for basic and diluted computations (in thousands)...         6,238       42,518       131,466
                                                                      ========     ========     =========
Per common share - basic and diluted:
   Loss before cumulative effect of change in accounting
    principle...................................................      $  (2.27)    $  (1.02)    $   (0.94)
   Cumulative effect of change in accounting principle..........            --           --         (0.02)
                                                                      --------     --------     ---------
   Net loss.....................................................      $  (2.27)    $  (1.02)    $   (0.96)
                                                                      ========     ========     =========
</TABLE>

   The calculations of common shares outstanding for the diluted computations
exclude the following potential common shares as of December 31, 1999: (1)
options to purchase 19,226,076 shares of common stock at exercise prices ranging
from $-0- to $25.62 per share; (2) warrants to purchase 1,194,990 shares of
common stock at an exercise price of $7.50 per share; (3) warrants to purchase
1,000,000 shares of common stock at an exercise price of $26.875 per share; (4)
shares of Crown Castle UK Holdings Limited ("CCUK", formerly Castle Transmission
Services (Holdings) Ltd) stock which are convertible into 17,443,500 shares of
common stock; and (5) shares of the Company's 8 1/4% Cumulative Convertible
Redeemable Preferred Stock (see Note 8) which are convertible into 7,441,860
shares of common stock.  The inclusion of such potential common shares in the
diluted per share computations would be antidilutive since the Company incurred
net losses for each of the three years in the period ended December 31, 1999.

   Foreign Currency Translation
   CCUK uses the British pound sterling as the functional currency for its
operations.  The Company translates CCUK's results of operations using the
average exchange rate for the period, and translates CCUK's assets and
liabilities using the exchange rate at the end of the period.  The cumulative
effect of changes in the exchange rate is recorded as a translation adjustment
in stockholders' equity.

                                       64
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   Financial Instruments
   The carrying amount of cash and cash equivalents approximates fair value for
these instruments.  The estimated fair value of the Company's public debt
securities is based on quoted market prices, and the estimated fair value of the
other long-term debt is determined based on the current rates offered for
similar borrowings. The estimated fair value of the interest rate swap agreement
is based on the amount that the Company would receive or pay to terminate the
agreement at the balance sheet date.  The estimated fair values of the Company's
financial instruments, along with the carrying amounts of the related assets
(liabilities), are as follows:

<TABLE>
<CAPTION>
                                     December 31, 1998            December 31, 1999
                                  -----------------------   ---------------------------------
                                   Carrying       Fair        Carrying            Fair
                                    Amount       Value         Amount            Value
                                  ----------   ----------   ------------   ------------------
<S>                               <C>          <C>          <C>            <C>
                                                  (In thousands of dollars)
Cash and cash equivalents.....    $ 296,450    $ 296,450    $   549,328          $   549,328
Long-term debt................     (429,710)    (443,379)    (1,542,343)          (1,542,500)
Interest rate swap agreement..           --          (47)            --                5,415
</TABLE>

   The Company's interest rate swap agreement is used to manage interest rate
risk.  The net settlement amount resulting from this agreement is recognized as
an adjustment to interest expense.  The Company does not currently hold or issue
derivative financial instruments for trading purposes.

   Stock Options

   In October 1995, the Financial Accounting Standards Board (the "FASB") issued
Statement of Financial Accounting Standards No. 123, Accounting for Stock-Based
Compensation ("SFAS 123").  SFAS 123 establishes alternative methods of
accounting and disclosure for employee stock-based compensation arrangements.
The Company has elected to continue the use of the "intrinsic value based
method" of accounting for its employee stock option plans (see Note 9).  This
method does not result in the recognition of compensation expense when employee
stock options are granted if the exercise price of the options equals or exceeds
the fair market value of the stock at the date of grant.  See Note 9 for the
disclosures required by SFAS 123.

   Recent Accounting Pronouncements

   In June 1997, the FASB issued Statement of Financial Accounting Standards No.
130, Reporting Comprehensive Income ("SFAS 130").  SFAS 130 establishes
standards for the reporting and display of comprehensive income in a company's
financial statements.  Comprehensive income includes all changes in a company's
equity accounts (including net income or loss) except investments by, or
distributions to, the company's owners.  Items which are components of
comprehensive income (other than net income or loss) include foreign currency
translation adjustments, minimum pension liability adjustments and unrealized
gains and losses on certain investments in debt and equity securities.  The
components of comprehensive income must be reported in a financial statement
that is displayed with the same prominence as other financial statements. SFAS
130 is effective for fiscal years beginning after December 15, 1997.  The
Company has adopted the requirements of SFAS 130 in its financial statements for
1998.

   In June 1997, the FASB issued Statement of Financial Accounting Standards No.
131, Disclosures about Segments of an Enterprise and Related Information ("SFAS
131").  SFAS 131 establishes standards for the way that public companies report,
in their annual financial statements, certain information about their operating
segments, their products and services, the geographic areas in which they
operate and their major customers. SFAS 131 also requires that certain
information about operating segments be reported in interim financial
statements.  SFAS 131 is effective for periods beginning after December 15,
1997.  The Company has adopted the requirements of SFAS 131 in its financial
statements for the year ended December 31, 1998 (see Note 13).

                                       65
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   In April 1998, the Accounting Standards Executive Committee of the American
Institute of Certified Public Accountants issued Statement of Position 98-5,
Reporting on the Costs of Start-Up Activities ("SOP 98-5"). SOP 98-5 requires
that costs of start-up activities be charged to expense as incurred and broadly
defines such costs.  The Company has deferred certain costs incurred in
connection with potential business initiatives and new geographic markets, and
SOP 98-5 requires that such deferred costs be charged to results of operations
upon its adoption.  SOP 98-5 is effective for fiscal years beginning after
December 15, 1998.  The Company has adopted the requirements of SOP 98-5 as of
January 1, 1999.  The cumulative effect of the change in accounting principle
for the adoption of SOP 98-5 resulted in a charge to results of operations for
$2,414,000 in the Company's financial statements for the year ended
December 31, 1999.

   In June 1998, the FASB issued Statement of Financial Accounting Standards No.
133, Accounting for Derivative Instruments and Hedging Activities ("SFAS 133").
SFAS 133 requires that derivative instruments be recognized as either assets or
liabilities in the consolidated balance sheet based on their fair values.
Changes in the fair values of such derivative instruments will be recorded
either in results of operations or in other comprehensive income, depending on
the intended use of the derivative instrument.  The initial application of SFAS
133 will be reported as the effect of a change in accounting principle.  SFAS
133, as amended, is effective for all fiscal quarters of fiscal years beginning
after June 15, 2000.  The Company will adopt the requirements of SFAS 133 in its
financial statements for the year ending December 31, 2001.  The Company
has not yet determined the effect that the adoption of SFAS 133 will have on its
consolidated financial statements.

2.    ACQUISITIONS

   During the three years in the period ended December 31, 1999, the Company
consummated a number of business and asset acquisitions which were accounted for
using the purchase method.  Results of operations and cash flows of the acquired
businesses are included in the consolidated financial statements for the periods
subsequent to the respective dates of acquisition.

   TEA Group Incorporated and TeleStructures, Inc. (collectively, "TEA")
   On May 12, 1997, the Company acquired all of the common stock of TEA.  TEA
provides telecommunications site selection, acquisition, design and development
services.  The purchase price of $14,215,000 consisted of $8,120,000 in cash (of
which $2,001,000 was paid in 1996 as an option payment), promissory notes
payable to the former stockholders of TEA totaling $1,872,000, the assumption of
$1,973,000 in outstanding debt and 535,710 shares of the Company's Class B
Common Stock valued at $2,250,000 (the estimated fair value of such common stock
on that date).  The Company recognized goodwill of $9,568,000 in connection with
this acquisition.  The Company repaid the promissory notes with a portion of the
proceeds from the issuance of its 10 5/8% Senior Discount Notes (see Note 5).

   Crown Communications ("CCM"), Crown Network Systems, Inc. ("CNS") and Crown
 Mobile Systems, Inc. ("CMS") (collectively, "Crown")
   On July 11, 1997, the Company entered into an asset purchase and merger
agreement with the owners of Crown.  On August 15, 1997, such agreement was
amended and restated, and the Company acquired (1) substantially all of the
assets, net of outstanding liabilities, of CCM; and (2) all of the outstanding
common stock of CNS and CMS.  Crown provides network services, which includes
site selection and acquisition, antenna installation, site development and
construction, network design and site maintenance, and owns and operates
telecommunications towers and related assets.  The purchase price of
$185,021,000 consisted of $27,843,000 in cash, a short-term promissory note
payable to the former owners of Crown for $76,230,000, the assumption of
$26,009,000 in outstanding debt and 7,325,000 shares of the Company's Class B
Common Stock valued at $54,939,000 (the estimated fair value of such common
stock on that date).  The Company recognized goodwill

                                       66
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

and other intangible assets of $146,103,000 in connection with this acquisition.
The Company financed the cash portion of the purchase price with proceeds from
the issuance of redeemable preferred stock (see Note 8), and repaid the
promissory note with proceeds from the issuance of additional redeemable
preferred stock and borrowings under the Senior Credit Facility (see Note 5).

   In 1997, the Company organized Crown Communication Inc. ("CCI", a Delaware
corporation) as a wholly owned subsidiary to own the net assets acquired from
CCM and the common stock of CNS and CMS.  In January 1998, the Company merged
Castle Tower Corporation ("CTC", a wholly owned operating subsidiary) with and
into CCI.

   CCUK
   On April 24, 1998, the Company entered into a share exchange agreement with
certain shareholders of CCUK pursuant to which certain of CCUK's shareholders
agreed to exchange their shares of CCUK for shares of the Company.  On August
18, 1998, the exchange was consummated and the Company's ownership of CCUK
increased from approximately 34.3% to 80%.  The Company issued 20,867,700 shares
of its Common Stock and 11,340,000 shares of its Class A Common Stock, with such
shares valued at an aggregate of $418,700,000 (based on the price per share to
the public in the Company's initial public offering as discussed in Note 9).
The Company recognized goodwill of $344,375,000 in connection with this
transaction, which was accounted for as an acquisition using the purchase
method.  CCUK's results of operations and cash flows are included in the
consolidated financial statements for the period subsequent to the date the
exchange was consummated.

   Agreement with Bell Atlantic Mobile ("BAM")
   On December 8, 1998, the Company entered into an agreement with Bell Atlantic
Mobile to form a joint venture ("Crown Atlantic") to own and operate a
significant majority of BAM's towers.  Upon formation of Crown Atlantic on March
31, 1999, (1) the Company contributed to Crown Atlantic $250,000,000 in cash and
15,597,783 shares of its Common Stock in exchange for a 61.5% ownership interest
in Crown Atlantic; (2) Crown Atlantic borrowed $180,000,000 under a committed
$250,000,000 revolving credit facility (see Note 5); and (3) BAM contributed to
Crown Atlantic approximately 1,458 towers in exchange for a cash distribution of
$380,000,000 from Crown Atlantic and a 38.5% ownership interest in Crown
Atlantic.  Upon dissolution of Crown Atlantic, BAM will receive (1) the shares
of the Company's Common Stock contributed to Crown Atlantic and (2) a payment
(either in cash or in shares of the Company's Common Stock, at the Company's
election) equal to approximately 15.6% of the fair market value of Crown
Atlantic's other net assets; the Company would then receive the remaining assets
and liabilities of Crown Atlantic.  The Company has accounted for its investment
in Crown Atlantic as an acquisition using the purchase method, and has included
Crown Atlantic's results of operations and cash flows in the Company's
consolidated financial statements for periods subsequent to formation.  The
Company recognized goodwill of approximately $64,163,000 in connection with this
acquisition.

   BellSouth Mobility Inc. and BellSouth Telecommunications Inc. ("BellSouth")
   In March 1999, the Company entered into an agreement with BellSouth to
acquire the operating rights for approximately 1,850 of their towers. The legal
form of the transaction is a lease arrangement and will be treated by
BellSouth as a sale of the towers for tax purposes. The Company will pay
BellSouth total consideration of $610,000,000, consisting of $430,000,000 in
cash and $180,000,000 in shares of its common stock. As of December 31, 1999,
the Company has closed on 1,574 of the towers and has paid $370,151,000 in cash
and issued 7,728,787 shares of its common stock. The Company is accounting for
this transaction as a purchase of tower assets.

                                       67
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   Powertel, Inc. ("Powertel")
   In March 1999, the Company entered into an agreement with Powertel to
purchase 650 of their towers and related assets.  The total purchase price for
these towers was $275,000,000 in cash, all of which has been paid as of December
31, 1999.  The Company has accounted for this transaction as an acquisition
using the purchase method.

   Pro Forma Results of Operations (Unaudited)
   The following unaudited pro forma summary presents consolidated results of
operations for the Company as if (1) the share exchange with CCUK's shareholders
had been consummated as of January 1, 1998; and (2) the Crown Atlantic,
BellSouth and Powertel acquisitions, along with the related financing
transactions, had been consummated as of January 1 for both 1998 and 1999.
Appropriate adjustments have been reflected for depreciation and amortization,
interest expense, amortization of deferred financing costs and minority
interests. The pro forma information does not necessarily reflect the actual
results that would have been achieved, nor is it necessarily indicative of
future consolidated results for the Company.
<TABLE>
<CAPTION>
                                                   Years Ended December 31,
                                                   ------------------------
                                                      1998          1999
                                                   -----------   ----------
<S>                                                <C>           <C>
                                                      (In thousands of
                                                          dollars,
                                                      except per share
                                                          amounts)
Net revenues........................................$ 301,978    $ 386,999
Net loss............................................ (153,192)    (144,246)
Net loss per common share - basic and diluted.......    (1.25)       (1.19)
</TABLE>

   Agreement with Nextel Communications, Inc. ("Nextel")
   On July 11, 1997, the Company entered into an agreement with Nextel (the
"Nextel Agreement") whereby the Company had the option to purchase up to 50 of
Nextel's existing towers which are located in Texas, Florida and the
metropolitan areas of Denver, Colorado and Philadelphia, Pennsylvania.  As of
December 31, 1999, the Company had purchased all 50 of such towers for an
aggregate price of $15,083,000 in cash.

   Millennium Communications Limited ("Millennium")
   On October 8, 1998, the Company acquired all of the outstanding shares of
Millennium.  Millennium develops, owns and operates telecommunications towers
and related assets in the United Kingdom.  On the date of acquisition,
Millennium owned 102 tower sites.  Millennium is being operated as a subsidiary
of CCUK.  The purchase price of $14,473,000 consisted of $9,813,000 in cash, the
repayment of $2,396,000 in outstanding debt and 358,678 shares of the Company's
common stock valued at $2,264,000 (the market value of such common stock on that
date).

   BellSouth DCS
   In July 1999, the Company entered into an agreement with certain affiliates
of BellSouth ("BellSouth DCS") to acquire the operating rights for approximately
773 of their towers. The legal form of the transaction is a lease arrangement
and will be treated by BellSouth as a sale of the towers for tax purposes. The
Company will pay BellSouth DCS total consideration of $316,930,000 in cash. As
of December 31, 1999, the Company has closed on 648 of these towers and has paid
$266,857,000 in cash. The Company is accounting for this transaction as a
purchase of tower assets.

   Agreement With GTE Corporation ("GTE")
   On November 7, 1999, the Company entered into an agreement with GTE to form a
joint venture ("Crown Castle GT") to own and operate a significant majority of
GTE's towers.  Upon formation of Crown Castle GT (which will occur in multiple
closings during 2000), (1) the Company will contribute approximately
$825,000,000 (of which up to $100,000,000 can be in shares of its common stock,
with the balance in cash) in

                                       68
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

exchange for a majority ownership interest in Crown Castle GT, and (2) GTE will
contribute approximately 2,300 towers in exchange for a cash distribution of
approximately $800,000,000 (less any amount contributed in the form of the
Company's common stock) from Crown Castle GT and a minority ownership interest
in Crown Castle GT. Upon dissolution of Crown Castle GT, GTE would receive (1)
any shares of the Company's common stock contributed to Crown Castle GT and (2)
a payment equal to approximately 11.4% of the fair market value of Crown Castle
GT's other net assets; the Company would then receive the remaining assets and
liabilities of Crown Castle GT. The Company will account for its investment in
Crown Castle GT as a purchase of tower assets, and will include Crown Castle
GT's results of operations and cash flows in the Company's consolidated
financial statements for periods subsequent to formation. Upon entering into
this agreement, the Company placed $50,000,000 into an escrow account; such
funds would be forfeited if the Company failed to close this transaction because
it was unable to obtain adequate financing. See Note 16.

<TABLE>
<CAPTION>

<S>     <C>
3.      PROPERTY AND EQUIPMENT
</TABLE>

   The major classes of property and equipment are as follows:
<TABLE>
<CAPTION>
                                                                              December 31,
                                                           Estimated     -------------------------
                                                          Useful Lives      1998          1999
                                                          ------------   ----------   ------------
<S>                                                       <C>            <C>          <C>
                                                                             (In thousands of
                                                                                 dollars)
Land and buildings........................................  0-50 years    $ 58,767     $   89,683
Telecommunications towers and broadcast transmission
 equipment................................................  5-20 years     532,907      2,458,741
Transportation and other equipment........................  3-10 years      11,452         20,231
Office furniture and equipment............................   3-7 years      12,248         18,919
                                                                          --------     ----------
                                                                           615,374      2,587,574
Less: accumulated depreciation............................                 (22,780)      (119,473)
                                                                          --------     ----------
                                                                          $592,594     $2,468,101
                                                                          ========     ==========
</TABLE>

   Depreciation expense for the years ended December 31, 1997, 1998 and 1999 was
$2,886,000, $20,638,000 and $96,556,000, respectively. Accumulated depreciation
on telecommunications towers and broadcast transmission equipment was
$19,583,000 and $110,366,000 at December 31, 1998 and 1999, respectively. At
December 31, 1999, minimum rentals receivable under existing operating leases
for towers are as follows: years ending December 31, 2000 - $352,640,000;
2001 -$342,473,000; 2002 - $337,536,000; 2003 - $324,963,000; 2004 -
$315,142,000; thereafter - $1,118,557,000.

4.    INVESTMENT IN AFFILIATE

   On February 28, 1997, the Company used a portion of the net proceeds from the
sale of the Series C Convertible Preferred Stock (see Note 8) to purchase an
ownership interest of approximately 34.3% in CCUK (a company incorporated under
the laws of England and Wales).  The Company led a consortium of investors which
provided the equity financing for CCUK. The funds invested by the consortium
were used by CCUK to purchase, through a wholly owned subsidiary, the domestic
broadcast transmission division of the British Broadcasting Corporation (the
"BBC").  The cost of the Company's investment in CCUK amounted to approximately
$57,542,000.  The Company accounted for its investment in CCUK utilizing the
equity method of accounting prior to the consummation of the share exchange
agreement with CCUK's shareholders in August 1998 (see Note 2).

   In March 1997, as compensation for leading the investment consortium, the
Company received a fee from CCUK amounting to approximately $1,165,000.  This
fee was recorded as other income by the Company when

                                       69
<PAGE>

              CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


received. In addition, the Company received approximately $1,679,000 from CCUK
as reimbursement for costs incurred prior to the closing of the purchase from
the BBC.

   In June 1997, as compensation for the successful completion of the investment
in CCUK and certain other acquisitions and investments, the Company paid bonuses
to two of its executive officers totaling $913,000. These bonuses are included
in corporate development expenses on the Company's consolidated statement of
operations.

   Summarized financial information for CCUK is as follows (for periods in which
the Company accounted for CCUK utilizing the equity method):
<TABLE>
<CAPTION>
                                                                    Ten Months     Eight Months
                                                                       Ended           Ended
                                                                   December 31,     August 31,
                                                                       1997            1998
                                                                   -------------   -------------
                                                                     (In thousands of dollars)
<S>                                                                <C>             <C>
Net revenues.......................................................... $103,531        $ 97,228
Operating expenses....................................................   86,999          78,605
                                                                       --------        --------
Operating income......................................................   16,532          18,623
Interest and other income.............................................      553             725
Interest expense and amortization of deferred financing costs.........  (20,404)        (13,378)
Provision for income taxes............................................       --              --
                                                                       --------        --------
Net income (loss)..................................................... $ (3,319)       $  5,970
                                                                       ========        ========
</TABLE>

5. LONG-TERM DEBT

   Long-term debt consists of the following:

<TABLE>
<CAPTION>
                                                                            December 31,
                                                                      -----------------------
                                                                        1998         1999
                                                                      ---------   -----------
<S>                                                                   <C>         <C>
                                                                     (In thousands of dollars)
Senior Credit Facility................................................ $  5,500    $   63,000
CCUK Credit Facility..................................................   55,177       133,456
Crown Atlantic Credit Facility........................................       --       180,000
9% Guaranteed Bonds due 2007..........................................  200,934       195,699
10 5/8% Senior Discount Notes due 2007, net of discount...............  168,099       186,434
10 3/8% Senior Discount Notes due 2011, net of discount...............       --       321,284
9% Senior Notes due 2011..............................................       --       180,000
11 1/4% Senior Discount Notes due 2011, net of discount...............       --       157,470
9 1/2% Senior Notes due 2011..........................................       --       125,000
                                                                       --------    ----------
                                                                       $429,710    $1,542,343
                                                                       ========    ==========
</TABLE>

   Senior Credit Facility

   CCI has a credit agreement with a syndicate of banks (as amended, the "Senior
Credit Facility") which consists of a $100,000,000 secured revolving line of
credit (see Note 16). Available borrowings under the Senior Credit Facility are
generally to be used to construct new towers and to finance a portion of the
purchase price for towers and related assets of CCI and its subsidiaries. The
amount of available borrowings is determined based on the current financial
performance (as defined) of CCI's assets. In addition, up to $5,000,000 of
borrowing availability under the Senior Credit Facility can be used for letters
of credit.

   On October 31, 1997, additional borrowings under the Senior Credit Facility,
along with the proceeds from the October issuance of Senior Preferred Stock (see
Note 8), were used to repay (1) the promissory note payable

                                       70
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

to the former stockholders of Crown; and (2) the outstanding borrowings under
Crown's bank credit agreement (see Note 2). In November 1997, the Company repaid
all of the outstanding borrowings under the Senior Credit Facility with a
portion of the proceeds from the issuance of its 10 5/8% Senior Discount Notes
(as discussed below). Upon the merger of CTC into CCI in January 1998, CCI
became the primary borrower under the Senior Credit Facility. In December 1998,
the Company again repaid all of the outstanding borrowings under the Senior
Credit Facility with a portion of the proceeds from the issuance of its 12 3/4%
Senior Exchangeable Preferred Stock (see Note 8). As of December 31, 1999,
approximately $19,250,000 of borrowings was available under the Senior Credit
Facility, of which $5,000,000 was available for letters of credit. There were no
letters of credit outstanding as of December 31, 1999.

   The amount of available borrowings under the Senior Credit Facility will
decrease by $5,000,000 at the end of each calendar quarter beginning on March
31, 2001 until December 31, 2004, at which time any remaining borrowings must be
repaid.  Under certain circumstances, CCI may be required to make principal
prepayments under the Senior Credit Facility in an amount equal to 50% of excess
cash flow (as defined), the net cash proceeds from certain asset sales or the
net cash proceeds from certain sales of equity or debt securities by the
Company.

   The Senior Credit Facility is secured by substantially all of the assets of
CCI and the Company's pledge of the capital stock of CCI and its subsidiaries.
In addition, the Senior Credit Facility is guaranteed by the Company.
Borrowings under the Senior Credit Facility bear interest at a rate per annum,
at the Company's election, equal to the bank's prime rate plus 1.5% or a
Eurodollar interbank offered rate (LIBOR) plus 3.25% (10.00% and 9.43%,
respectively, at December 31, 1999).  The interest rate margins may be reduced
by up to 2.25% (non-cumulatively) based on a financial test, determined
quarterly.  As of December 31, 1999, the financial test permitted a reduction of
1.125% in the interest rate margin for prime rate borrowings and 1.625% in the
interest rate margin for LIBOR borrowings.  Interest on prime rate loans is due
quarterly, while interest on LIBOR loans is due at the end of the period (from
one to three months) for which such LIBOR rate is in effect.  The Senior Credit
Facility requires CCI to maintain certain financial covenants and places
restrictions on CCI's ability to, among other things, incur debt and liens, pay
dividends, make capital expenditures, dispose of assets, undertake transactions
with affiliates and make investments.

   CCUK Credit Facility
   CCUK has a credit agreement with a syndicate of banks (as amended, the "CCUK
Credit Facility").  In June 1999, the CCUK Credit Facility was amended to (1)
increase the available borrowings to (Pounds)150,000,000 (approximately
$242,250,000) and (2) extend the maturity date to June 2006.  The amended
facility comprises (1) a seven year (Pounds)100,000,000 (approximately
$161,500,000) revolving loan facility which converts into a term loan facility
on the third anniversary of the amendment date and (2) a seven year
(Pounds)50,000,000 (approximately $80,750,000) revolving loan facility.
Available borrowings under the CCUK Credit Facility are generally to be used to
finance capital expenditures and for working capital and general corporate
purposes.  As of December 31, 1999, unused borrowing availability under the CCUK
Credit Facility amounted to approximately (Pounds)65,000,000 (approximately
$104,975,000).

   In June 2002, the amount drawn under the (Pounds)100,000,000 revolving loan
facility is converted into a term loan facility and is amortized in equal semi-
annual installments on June 30 and December 31 of each year, with the final
installment being due in June 2006.  The (Pounds)50,000,000 revolving loan
facility expires in June 2006. Under certain circumstances, CCUK may be required
to make principal prepayments from the proceeds of certain asset sales.

                                       71
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   The CCUK Credit Facility is secured by substantially all of CCUK's assets.
Borrowings under the CCUK Credit Facility bear interest at a rate per annum
equal to a Eurodollar interbank offered rate (LIBOR) plus 1.5% (approximately
7.08% at December 31, 1999). The interest rate margin may be reduced by up to
0.875% (non-cumulatively) based on a financial test. Interest is due at the end
of the period (from one to six months) for which such LIBOR rate is in effect.
The CCUK Credit Facility requires CCUK to maintain certain financial covenants
and places restrictions on CCUK's ability to, among other things, incur debt and
liens, pay dividends, make capital expenditures, dispose of assets, undertake
transactions with affiliates and make investments.

   Crown Atlantic Credit Facility
   Crown Atlantic has a credit agreement with a syndicate of banks (the "Crown
Atlantic Credit Facility") which consists of a $250,000,000 secured revolving
line of credit. Available borrowings under the Crown Atlantic Credit Facility
are generally to be used to construct new towers and to finance a portion of the
purchase price for towers and related assets of Crown Atlantic. The amount of
available borrowings is determined based on the current financial performance
(as defined) of Crown Atlantic's assets. In addition, up to $25,000,000 of
borrowing availability under the Crown Atlantic Credit Facility can be used for
letters of credit.

   On March 31, 1999, Crown Atlantic borrowed $180,000,000 under the Crown
Atlantic Credit Facility to fund a portion of the cash payment to BAM (see Note
2).  As of December 31, 1999, approximately $70,000,000 of borrowings was
available under the Crown Atlantic Credit Facility, of which $25,000,000 was
available for letters of credit.  There were no letters of credit outstanding as
of December 31, 1999.

   The amount of available borrowings under the Crown Atlantic Credit Facility
will decrease by a stated amount at the end of each calendar quarter beginning
on September 30, 2001 until March 31, 2006, at which time any remaining
borrowings must be repaid.  Under certain circumstances, Crown Atlantic may be
required to make principal prepayments under the Crown Atlantic Credit Facility
in an amount equal to 50% of excess cash flow (as defined), the net cash
proceeds from certain asset sales or the net cash proceeds from certain sales of
equity or debt securities.

   The Crown Atlantic Credit Facility is secured by a pledge of the membership
interest in Crown Atlantic and a security interest in Crown Atlantic's tenant
leases. Borrowings under the Crown Atlantic Credit Facility bear interest at a
rate per annum, at Crown Atlantic's election, equal to the bank's prime rate
plus 1.25% or a Eurodollar interbank offered rate (LIBOR) plus 2.75% (9.75% and
8.93%, respectively, at December 31, 1999). The interest rate margins may be
reduced by up to 1.75% (non-cumulatively) based on a financial test, determined
quarterly. As of December 31, 1999, the financial test permitted no reduction in
the interest rate margin for prime rate borrowings or LIBOR borrowings. Interest
on prime rate loans is due quarterly, while interest on LIBOR loans is due at
the end of the period (from one to three months) for which such LIBOR rate is in
effect. The Crown Atlantic Credit Facility requires Crown Atlantic to maintain
certain financial covenants and places restrictions on Crown Atlantic's ability
to, among other things, incur debt and liens, pay dividends, make capital
expenditures, dispose of assets, undertake transactions with affiliates and make
investments.

   9% Guaranteed Bonds due 2007 ("CCUK Bonds")
   CCUK has issued (Pounds)125,000,000 (approximately $201,875,000) aggregate
principal amount of the CCUK Bonds.  Interest payments on the CCUK Bonds are due
annually on each March 30.  The maturity date of the CCUK Bonds is March 30,
2007.  The CCUK Bonds are stated net of unamortized discount.

   The CCUK Bonds are redeemable, at the option of CCUK, in whole or in part at
any time, at the greater of their principal amount and such a price as will
provide a gross redemption yield 0.5% per annum above the gross redemption yield
on the benchmark gilt plus, in either case, accrued and unpaid interest.  Under
certain

                                       72
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

circumstances, each holder of the CCUK Bonds has the right to require CCUK to
repurchase all or a portion of such holder's CCUK Bonds at a price equal to 101%
of their aggregate principal amount plus accrued and unpaid interest.

   The CCUK Bonds are guaranteed by CCUK; however, they are unsecured and
effectively subordinate to the outstanding borrowings under the CCUK Credit
Facility.  The trust deed governing the CCUK Bonds places restrictions on CCUK's
ability to, among other things, pay dividends and make capital distributions,
make investments, incur additional debt and liens, dispose of assets and
undertake transactions with affiliates.

   10 5/8% Senior Discount Notes due 2007 (the "10 5/8% Discount Notes")

   On November 25, 1997, the Company issued $251,000,000 aggregate principal
amount (at maturity) of the 10 5/8% Discount Notes for proceeds of $150,010,000
(net of original issue discount).  The Company used a portion of the proceeds
from the sale of the 10 5/8% Discount Notes to (1) repay all of the outstanding
borrowings, including accrued interest thereon, under the Senior Credit
Facility; (2) repay the promissory notes payable, including accrued interest
thereon, to the former stockholders of TEA (see Note 2); (3) repay certain
indebtedness, including accrued interest thereon, from a prior acquisition; and
(4) repay outstanding installment debt assumed in connection with the Crown
acquisition (see Note 2).

   The 10 5/8% Discount Notes will not pay any interest until May 15, 2003, at
which time semi-annual interest payments will commence and become due on each
May 15 and November 15 thereafter. The maturity date of the 10 5/8% Discount
Notes is November 15, 2007. The 10 5/8% Discount Notes are net of unamortized
discount of $82,901,000 and $64,566,000 at December 31, 1998 and 1999,
respectively.

   The 10 5/8% Discount Notes are redeemable at the option of the Company, in
whole or in part, on or after November 15, 2002 at a price of 105.313% of the
principal amount plus accrued interest. The redemption price is reduced annually
until November 15, 2005, after which time the 10 5/8% Discount Notes are
redeemable at par. Prior to November 15, 2000, the Company may redeem up to 35%
of the aggregate principal amount of the 10 5/8% Discount Notes, at a price of
110.625% of the accreted value thereof, with the net cash proceeds from a public
offering of the Company's common stock.

   10 3/8% Senior Discount Notes due 2011 (the "10 3/8% Discount Notes") and
    9% Senior Notes due 2011 (the "9% Senior Notes")

   On May 12, 1999, the Company issued (1) $500,000,000 aggregate principal
amount (at maturity) of its 10 3/8% Discount Notes for proceeds of $292,644,000
(net of original issue discount of $198,305,000 and after underwriting discounts
of $9,051,000) and (2) $180,000,000 aggregate principal amount of its 9% Senior
Notes for proceeds of $174,600,000 (after underwriting discounts of $5,400,000).
The Company used a portion of the proceeds from the sale of these securities to
repay $100,000,000 in outstanding borrowings, including accrued interest
thereon, under a term loan credit facility in connection with the BellSouth and
Powertel transactions (see Note 2).  The remaining proceeds are being used to
pay the remaining purchase price for such transactions, to fund the initial
interest payments on the 9% Senior Notes and for general corporate purposes.

   The 10 3/8% Discount Notes will not pay any interest until November 15, 2004,
at which time semi-annual interest payments will commence and become due on each
May 15 and November 15 thereafter. Semi-annual interest payments for the 9%
Senior Notes are due on each May 15 and November 15, commencing on November 15,
1999. The maturity date of the 10 3/8% Discount Notes and the 9% Senior Notes is
May 15, 2011. The 10 3/8% Discount Notes are net of unamortized discount of
$178,716,000 at December 31, 1999.

                                       73
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   The 10 3/8% Discount Notes and the 9% Senior Notes are redeemable at the
option of the Company, in whole or in part, on or after May 15, 2004 at prices
of 105.187% and 104.5%, respectively, of the principal amount plus accrued
interest. The redemption prices are reduced annually until May 15, 2007, after
which time the 10 3/8% Discount Notes and the 9% Senior Notes are redeemable at
par. Prior to May 15, 2002, the Company may redeem up to 35% of the aggregate
principal amount of the 10 3/8% Discount Notes and the 9% Senior Notes, at
prices of 110.375% and 109%, respectively, of the accreted value thereof, with
the net cash proceeds from a public offering of the Company's common stock.

   11 1/4% Senior Discount Notes due 2011 (the "11 1/4% Discount Notes") and
9 1/2% Senior Notes due 2011 (the "9 1/2% Senior Notes")

   On July 27, 1999, the Company issued (1) $260,000,000 aggregate principal
amount (at maturity) of its 11 1/4% Discount Notes for proceeds of $147,501,000
(net of original issue discount of $109,489,000 and after underwriting discounts
of $3,010,000) and (2) $125,000,000 aggregate principal amount of its 9 1/2%
Senior Notes for proceeds of $122,500,000 (after underwriting discounts of
$2,500,000) (collectively, the "July Offerings").  The proceeds from the sale of
these securities are being used to pay the purchase price for the BellSouth DCS
transaction (see Note 2), to fund the initial interest payments on the 9 1/2%
Senior Notes and for general corporate purposes.

   The 11 1/4% Discount Notes will not pay any interest until February 1, 2005,
at which time semi-annual interest payments will commence and become due on each
February 1 and August 1 thereafter.  Semi-annual interest payments for the
9 1/2% Senior Notes are due on each February 1 and August 1, commencing on
February 1, 2000. The maturity date of the 11 1/4% Discount Notes and the 9 1/2%
Senior Notes is August 1, 2011. The 11 1/4% Discount Notes are net of
unamortized discount of $102,530,000 at December 31, 1999.

   The 11 1/4% Discount Notes and the 9 1/2% Senior Notes are redeemable at the
option of the Company, in whole or in part, on or after August 1, 2004 at prices
of 105.625% and 104.75%, respectively, of the principal amount plus accrued
interest.  The redemption prices are reduced annually until August 1, 2007,
after which time the 11 1/4% Discount Notes and the 9 1/2% Senior Notes are
redeemable at par.  Prior to August 1, 2002, the Company may redeem up to 35% of
the aggregate principal amount of the 11 1/4% Discount Notes and the 9 1/2%
Senior Notes, at prices of 111.25% and 109.5%, respectively, of the accreted
value thereof, with the net cash proceeds from a public offering of the
Company's common stock.

   Structural Subordination of the Debt Securities

   The 10 5/8% Discount Notes, the 10 3/8% Discount Notes, the 9% Senior Notes,
the 11 1/4% Discount Notes and the 9 1/2% Senior Notes (collectively, the "Debt
Securities") are senior indebtedness of the Company; however, they are unsecured
and effectively subordinate to the liabilities of the Company's subsidiaries,
which include outstanding borrowings under the Senior Credit Facility, the CCUK
Credit Facility, the Crown Atlantic Credit Facility and the CCUK Bonds. The
indentures governing the Debt Securities (the "Indentures") place restrictions
on the Company's ability to, among other things, pay dividends and make capital
distributions, make investments, incur additional debt and liens, issue
additional preferred stock, dispose of assets and undertake transactions with
affiliates. As of December 31, 1999, the Company was effectively precluded from
paying dividends on its capital stock under the terms of the Indentures.

   Reporting Requirements Under the Indentures Governing the Company's Debt
 Securities and the Certificate of Designations Governing the Company's 12 3/4%
 Senior Exchangeable Preferred Stock (the "Certificate")
   The following information (as such capitalized terms are defined in the
Indentures and the Certificate) is presented solely as a requirement of the
Indentures and the Certificate; such information is not intended as an

                                       74
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


alternative measure of financial position, operating results or cash flow from
operations (as determined in accordance with generally accepted accounting
principles).  Furthermore, the Company's measure of the following information
may not be comparable to similarly titled measures of other companies.

   Upon consummation of the share exchange with CCUK's shareholders (see Note
2), which increased the Company's ownership interest in CCUK to 80%, the Company
designated CCUK as an Unrestricted Subsidiary. In addition, the Company has
designated Crown Atlantic as an Unrestricted Subsidiary (see Note 2).  Prior to
these transactions, the Company did not have any Unrestricted Subsidiaries.
Summarized financial information for (1) the Company and its Restricted
Subsidiaries; and (2) the Company's Unrestricted Subsidiaries is as follows:
<TABLE>
<CAPTION>
                                                                    December 31, 1999
                                               -----------------------------------------------------------
                                               Company and
                                                Restricted     Unrestricted   Consolidation    Consolidated
                                               Subsidiaries    Subsidiaries    Eliminations       Total
                                               ------------   ------------   --------------   ------------
 <S>                                            <C>            <C>            <C>              <C>
                                                                (In thousands of dollars)

Cash and cash equivalents......................  $  494,724     $   54,604       $      --      $  549,328
Other current assets...........................      59,106         53,611              --         112,717
Property and equipment, net....................   1,350,610      1,117,491              --       2,468,101
Escrow deposit for acquisition.................      50,000             --              --          50,000
Investments in Unrestricted Subsidiaries.......     991,261             --        (991,261)             --
Goodwill and other intangible assets, net......     132,553        463,594              --         596,147
Other assets, net..............................      48,578         11,779              --          60,357
                                                 ----------     ----------       ---------      ----------
                                                 $3,126,832     $1,701,079       $(991,261)     $3,836,650
                                                 ==========     ==========       =========      ==========

Current liabilities............................  $   49,905     $   81,376       $      --      $  131,281
Long-term debt.................................   1,033,188        509,155              --       1,542,343
Other liabilities..............................       3,069         63,995              --          67,064
Minority interests.............................          --         55,292              --          55,292
Redeemable preferred stock.....................     422,923             --              --         422,923
Stockholders' equity...........................   1,617,747        991,261        (991,261)      1,617,747
                                                 ----------     ----------       ---------      ----------
                                                 $3,126,832     $1,701,079       $(991,261)     $3,836,650
                                                 ==========     ==========       =========      ==========
</TABLE>

                                       75
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANICAL STATEMENTS (CONTINUED)

<TABLE>
<CAPTION>
                                    Three Months Ended December 31, 1999                  Year Ended December 31, 1999
                                ---------------------------------------------     --------------------------------------------
                                 Company and                                      Company and
                                 Restricted      Unrestricted    Consolidated      Restricted     Unrestricted        Consolidated
                                 Subsidiaries     Subsidiaries        Total        Subsidiaries     Subsidiaries        Total
                                 -------------   -------------   -------------    -------------   -------------      -------------
                                                                     (In thousands of dollars)
<S>                             <C>             <C>             <C>             <C>             <C>             <C>
Net revenues....................... $ 40,694        $ 73,502        $114,196        $104,177        $241,582           $ 345,759
Costs of operations
 (exclusive of depreciation
 and amortization).................   17,327          34,534          51,861          42,737         114,011             156,748
General and administrative.........   10,578           3,169          13,747          33,052          10,771              43,823
Corporate development..............    1,181              88           1,269           4,584             819               5,403
Restructuring charges..............    3,831              --           3,831           5,645              --               5,645
Non-cash compensation charges......      340             161             501           1,404             769               2,173
Depreciation and amortization......   16,251          24,486          40,737          42,354          87,752             130,106
                                    --------        --------        --------        --------        --------            ---------
Operating income (loss)............   (8,814)         11,064           2,250         (25,599)         27,460               1,861
Interest and other income
 (expense).........................    4,339             590           4,929           9,934           7,797              17,731
Interest expense and
 amortization of deferred
 financing costs...................  (25,891)        (12,669)        (38,560)        (70,341)        (40,567)           (110,908)
Provision for income taxes.........       (7)             --              (7)           (275)             --                (275)
Minority interests.................       --          (1,569)         (1,569)             --          (2,756)             (2,756)
Cumulative effect of change
 in accounting principle for
 costs of start-up activities......       --              --              --          (2,414)             --              (2,414)
                                    --------        --------        --------        --------        --------            ---------
Net loss........................... $(30,373)       $ (2,584)       $(32,957)       $(88,695)       $ (8,066)          $ (96,761)
                                    ========        ========        ========        ========        ========            =========
</TABLE>

   Tower Cash Flow and Adjusted Consolidated Cash Flow for the Company and its
Restricted Subsidiaries is as follows under (1) the indenture governing the
10 5/8% Discount Notes and the Certificate (the "1997 and 1998 Securities") and
(2) the indentures governing the 10 3/8% Discount Notes, the 9% Senior Notes,
the 11 1/4% Discount Notes and the 9 1/2% Senior Notes (the "1999 Securities"):

<TABLE>
<CAPTION>
                                                                               1997 and 1998       1999
                                                                                 Securities     Securities
                                                                               --------------   -----------
                                                                                (In thousands of dollars)
                                                                                       (Unaudited)
<S>                                                                            <C>              <C>
Tower Cash Flow, for the three months ended December 31, 1999...................... $ 12,339      $ 12,339
                                                                                    ========      ========
Consolidated Cash Flow, for the twelve months ended December 31, 1999.............. $ 23,804      $ 28,388
Less: Tower Cash Flow, for the twelve months ended December 31, 1999...............  (33,022)      (33,022)
Plus: four times Tower Cash Flow, for the three months ended December 31,
 1999..............................................................................   49,356        49,356
                                                                                    --------      --------
Adjusted Consolidated Cash Flow, for the twelve months ended December 31,
 1999.............................................................................. $ 40,138      $ 44,722
                                                                                    ========      ========
</TABLE>

                                       76
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


   Restricted Net Assets of Subsidiaries
   Under the terms of the Senior Credit Facility, the CCUK Credit Facility, the
Crown Atlantic Credit Facility and the CCUK Bonds, the Company's subsidiaries
are limited in the amount of dividends which can be paid to the Company.  For
CCI, the amount of such dividends is limited to (1) $6,000,000 per year until
October 31, 2002, and $33,000,000 per year thereafter; and (2) an amount to pay
income taxes attributable to the Company's Restricted Subsidiaries.  CCUK and
Crown Atlantic are effectively precluded from paying dividends.  The restricted
net assets of the Company's subsidiaries totaled approximately $1,003,701,000 at
December 31, 1999.

   Interest Rate Swap Agreements
   The Company had an interest rate swap agreement in connection with amounts
borrowed under the Senior Credit Facility which terminated on February 24, 1999.
The Company paid a fixed rate of 6.28% on the notional amount and received a
floating rate based on LIBOR.  This agreement effectively changed the interest
rate on $17,925,000 of borrowings under the Senior Credit Facility from a
floating rate to a fixed rate of 6.28% plus the applicable margin.

   In April 1999, the Company entered into an interest rate swap agreement in
connection with amounts borrowed under the Crown Atlantic Credit Facility.  This
interest rate swap agreement has an initial notional amount of $100,000,000,
decreasing on a quarterly basis beginning September 30, 2003 until the
termination of the agreement on March 31, 2006.  The Company pays a fixed rate
of 5.79% on the notional amount and receives a floating rate based on LIBOR.
This agreement effectively changes the interest rate on a portion of the
borrowings under the Crown Atlantic Credit Facility from a floating rate to a
fixed rate of 5.79% plus the applicable margin.  The Company does not believe
there is any significant exposure to credit risk due to the creditworthiness of
the counterparty.  In the event of nonperformance by the counterparty, the
Company's loss would be limited to any unfavorable interest rate differential.

6. INCOME TAXES

   The provision for income taxes consists of the following:

<TABLE>
<CAPTION>
                            Years Ended December 31,
                         -----------------------------
                            1997    1998    1999
                            -----   -----   -----
                          (In thousands of dollars)
<S>                         <C>     <C>     <C>
Current:
 State..................   $  --   $ 365   $  55
 Puerto Rico............      49       9      --
 Foreign................      --      --     220
                           -----   -----   -----
                           $  49   $ 374   $ 275
                           =====   =====   =====
</TABLE>

   A reconciliation between the provision for income taxes and the amount
computed by applying the federal statutory income tax rate to the loss before
income taxes is as follows:

                                       77
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<TABLE>
<CAPTION>
                                                                   Years Ended December 31,
                                                              -----------------------------------
                                                                1997         1998         1999
                                                              ---------   ----------   ----------
<S>                                                           <C>         <C>          <C>
                                                                  (In thousands of dollars)
Benefit for income taxes at statutory rate...................  $(4,044)    $(12,154)    $(31,047)
Depreciation on basis difference in joint venture............       --           --        1,012
Amortization of intangible assets............................      478          604          770
Stock-based compensation.....................................       --        2,844          477
State and foreign taxes, net of federal tax benefit..........       --          247          182
Expenses for which no federal tax benefit was recognized.....       28          151          152
Acquisition costs............................................       --         (675)          34
Puerto Rico taxes............................................       49            9           --
Foreign earnings not subject to tax..........................       --         (584)        (781)
Changes in valuation allowances..............................    3,650        9,944       29,451
Other........................................................     (112)         (12)          25
                                                               -------     --------     --------
                                                               $    49     $    374     $    275
                                                               =======     ========     ========
</TABLE>

   The components of the net deferred income tax assets and liabilities are as
 follows:
<TABLE>
<CAPTION>
                                                    December 31,
                                              ------------------------
                                                 1998         1999
                                              ----------   -----------
<S>                                           <C>          <C>
                                                 (In thousands of
                                                     dollars)
Deferred income tax liabilities:
 Property and equipment...................... $   6,045      $ 30,055
 Other.......................................        84            14
                                               --------      --------
   Total deferred income tax liabilities.....     6,129        30,069
                                               --------      --------

Deferred income tax assets:
 Net operating loss carryforwards............    19,071        76,826
 Noncompete agreement........................       464           348
 Intangible assets...........................       351           264
 Puerto Rico losses..........................        --           238
 Accrued liabilities.........................        68            68
 Receivables allowance.......................        41            55
 Other.......................................        45            45
 Valuation allowances........................   (13,911)      (47,775)
                                               --------      --------
   Total deferred income tax assets, net.....     6,129        30,069
                                               --------      --------
Net deferred income tax liabilities.......... $     --       $     --
                                              =========    ==========
</TABLE>

   Valuation allowances of $13,911,000 and $47,775,000 were recognized to offset
net deferred income tax assets as of December 31, 1998 and 1999, respectively.

   At December 31, 1999, the Company has net operating loss carryforwards of
approximately $225,959,000 which are available to offset future federal taxable
income. These loss carryforwards will expire in 2010 through 2019. The
utilization of the loss carryforwards is subject to certain limitations.

7. MINORITY INTERESTS

   Minority interests represent the minority shareholder's 20% interest in CCUK
and the minority partner's 38.5% interest in Crown Atlantic.

                                       78
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


8.    REDEEMABLE PREFERRED STOCK

   Redeemable preferred stock ($.01 par value, 10,000,000 shares authorized)
consists of the following:

<TABLE>
<CAPTION>
                                                                                          December 31,
                                                                                     ----------------------
                                                                                        1998        1999
                                                                                     ----------   ---------
<S>                                                                                  <C>          <C>
                                                                                    (In thousands of dollars)

12 3/4% Senior Exchangeable Preferred Stock; shares issued:
 December 31, 1998 - 200,000 and December 31, 1999 - 226,745 (stated at
  mandatory redemption and aggregate liquidation value)..........................       $201,063     $227,950
8 1/4% Cumulative Convertible Redeemable Preferred Stock; shares issued:
 December 31, 1998 - none and December 31, 1999 - 200,000 (stated net
  of unamortized value of warrants; mandatory redemption and aggregate
  liquidation value of $200,000).................................................             --      194,973
                                                                                        --------     --------
                                                                                        $201,063     $422,923
                                                                                        ========     ========
</TABLE>

   Exchangeable Preferred Stock
   On December 16, 1998, the Company issued 200,000 shares of its 12 3/4% Senior
Exchangeable Preferred Stock due 2010 (the "Exchangeable Preferred Stock") at a
price of $1,000 per share (the liquidation preference per share).  The net
proceeds received by the Company from the sale of such shares amounted to
approximately $193,000,000 (after underwriting discounts of $7,000,000 but
before other expenses of the offering, which amounted to approximately
$8,059,000).  A portion of the net proceeds was used to repay outstanding
borrowings under the Senior Credit Facility of $73,750,000, and the remaining
net proceeds were used to pay a portion of the purchase price for the Crown
Atlantic transaction (see Note 2).

   The holders of the Exchangeable Preferred Stock are entitled to receive
cumulative dividends at the rate of 12 3/4% per share, compounded quarterly on
each March 15, June 15, September 15 and December 15 of each year, beginning on
March 15, 1999.  On or before December 15, 2003, the Company has the option to
pay dividends in cash or in additional shares of Exchangeable Preferred Stock.
After December 15, 2003, dividends are payable only in cash.

   The Company is required to redeem all outstanding shares of Exchangeable
Preferred Stock on December 15, 2010 at a price equal to the liquidation
preference plus accumulated and unpaid dividends. On or after December 15, 2003,
the shares are redeemable at the option of the Company, in whole or in part, at
a price of 106.375% of the liquidation preference. The redemption price is
reduced on an annual basis until December 15, 2007, at which time the shares are
redeemable at the liquidation preference. Prior to December 15, 2001, the
Company may redeem up to 35% of the Exchangeable Preferred Stock, at a price of
112.75% of the liquidation preference, with the net proceeds from certain public
equity offerings. The shares of Exchangeable Preferred Stock are exchangeable,
at the option of the Company, in whole but not in part, for 12 3/4% Senior
Subordinated Exchange Debentures due 2010.

   The Company's obligations with respect to the Exchangeable Preferred Stock
are subordinate to all indebtedness of the Company (including the Debt
Securities), and are effectively subordinate to all debt and liabilities of the
Company's subsidiaries (including the Senior Credit Facility, the CCUK Credit
Facility, the Crown Atlantic Credit Facility and the CCUK Bonds).  The
certificate of designations governing the Exchangeable Preferred Stock places
restrictions on the Company's ability to, among other things, pay dividends and
make capital distributions, make investments, incur additional debt and liens,
issue additional preferred stock, dispose of assets and undertake transactions
with affiliates.

                                       79
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   Convertible Preferred Stock
   On November 19, 1999, the Company issued 200,000 shares of its 8 1/4%
Cumulative Convertible Redeemable Preferred Stock (the "Convertible Preferred
Stock") at a price of $1,000 per share (the liquidation preference per share) to
General Electric Capital Corporation ("GECC").  The Company received net
proceeds of approximately $191,500,000 (after structuring and underwriting fees
of $8,500,000 but before other expenses of the transaction).  The net proceeds
will be used to pay a portion of the purchase price for the GTE joint venture
(see Note 2).

   GECC will be entitled to receive cumulative dividends at the rate of 8 1/4%
per annum payable on March 15, June 15, September 15 and December 15 of each
year, beginning on December 15, 1999.  The Company will have the option to pay
dividends in cash or in shares of its Common Stock having a current market value
equal to the stated dividend amount.  GECC also received warrants to purchase
1,000,000 shares of the Company's Common Stock at an exercise price of $26.875
per share.  The warrants will be exercisable, in whole or in part, at any time
for a period of five years following the issue date.

   The Company is required to redeem all outstanding shares of the Convertible
Preferred Stock on March 31, 2012 at a price equal to the liquidation preference
plus accumulated and unpaid dividends.  On or after October 1, 2002, the shares
are redeemable at the option of the Company, in whole or in part, at a price of
104.125% of the liquidation preference.  The redemption price is reduced on an
annual basis until October 1, 2005, at which time the shares are redeemable at
the liquidation preference.  The shares of Convertible Preferred Stock are
convertible, at the option of GECC, in whole or in part at any time, into shares
of the Company's Common Stock at a conversion price of $26.875 per share of
Common Stock.

   The Company's obligations with respect to the Convertible Preferred Stock are
subordinate to all indebtedness and the Exchangeable Preferred Stock of the
Company, and are effectively subordinate to all debt and liabilities of the
Company's subsidiaries.  The certificate of designations governing the
Convertible Preferred Stock places restrictions on the Company similar to those
imposed by the Company's Debt Securities and the Exchangeable Preferred Stock.

   Senior Preferred Stock
   In August 1997, the Company issued 292,995 shares of its Senior Convertible
Preferred Stock (the "Senior Preferred Stock") at a price of $100 per share.
The net proceeds received by the Company from the sale of such shares amounted
to approximately $29,266,000, most of which was used to pay the cash portion of
the purchase price for Crown (see Note 2).  In October 1997, the Company issued
an additional 364,500 shares of its Senior Preferred Stock at a price of $100
per share.  The net proceeds received by the Company from the sale of such
shares amounted to $36,450,000.  This amount, along with borrowings under the
Senior Credit Facility, was used to repay the promissory note from the Crown
acquisition (see Note 2).

   The holders of the Senior Preferred Stock were entitled to receive cumulative
dividends at the rate of 12.5% per share, compounded annually.  At the option of
the holder, each share of Senior Preferred Stock (plus any accrued and unpaid
dividends) was convertible, at any time, into shares of the Company's common
stock at a conversion price of $7.50 (subject to adjustment in the event of an
underwritten public offering of the Company's common stock).  At the date of
issuance of the Senior Preferred Stock, the Company believes that its conversion
price represented the estimated fair value of the common stock on that date.  In
July 1998, all of the shares of Senior Preferred Stock were converted into
shares of common stock (see Note 9).

   The purchasers of the Senior Preferred Stock were also issued warrants to
purchase an aggregate 1,314,990 shares of the Company's common stock at an
exercise price of $7.50 per share (subject to adjustment in the

                                       80
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

event of an underwritten public offering of the Company's common stock). The
warrants are exercisable, in whole or in part, at any time until August and
October of 2007. At the date of issuance of the warrants, the Company believes
that the exercise price represented the estimated fair value of the common stock
on that date. As such, the Company has not assigned any value to the warrants in
its consolidated financial statements.

   Series Preferred Stock
   The holders of the Company's Series A Convertible Preferred Stock (the
"Series A Preferred Stock"), the Series B Convertible Preferred Stock (the
"Series B Preferred Stock") and the Series C Convertible Preferred Stock (the
"Series C Preferred Stock") (collectively, the "Series Preferred Stock") were
entitled to receive dividends, if and when declared, at the same rate as
dividends were declared and paid with respect to the Company's common stock.
Each of the outstanding shares of Series Preferred Stock was automatically
converted into five shares of common stock upon consummation of the Company's
initial public offering (see Note 9).

   In February and April of 1997, the Company issued 3,529,832 shares of its
Series C Preferred Stock at a price of $21.00 per share.  The net proceeds
received by the Company from the sale of the Series C Preferred Stock amounted
to approximately $74,024,000.  A portion of this amount was used to purchase the
ownership interest in CCUK (see Note 4).

9.    STOCKHOLDERS' EQUITY

   Common Stock
   On May 12, 1999, the Company sold shares of its common stock and debt
securities in concurrent underwritten public offerings (collectively, the "May
Offerings") (see Note 5). The Company sold 21,000,000 shares of its common stock
at a price of $17.50 per share and received proceeds of $352,800,000 (after
underwriting discounts of $14,700,000). The Company had granted the underwriters
for the May Offerings an over-allotment option to purchase an additional
3,150,000 shares of the Company's common stock. On May 13, 1999, the
underwriters exercised this over-allotment option in full. As a result, the
Company received additional proceeds of $52,920,000 (after underwriting
discounts of $2,205,000). The proceeds from the May Offerings are being used to
pay the remaining purchase price for the BellSouth and Powertel transactions, to
fund the initial interest payments on the 9% Senior Notes and for general
corporate purposes.

   On June 15, 1999, the Company sold shares of its common stock to a subsidiary
of TeleDiffusion de France International S.A. ("TdF") pursuant to TdF's
preemptive rights related to two recent acquisitions.  The Company sold
5,395,539 shares at $12.63 per share and 125,066 shares at $13.00 per share.
The aggregate proceeds of approximately $69,772,000 will be used for general
corporate purposes.

   On July 20, 1999, the Company sold shares of its common stock to a subsidiary
of TdF pursuant to TdF's preemptive rights related to the May Offerings.  The
Company sold 8,351,791 shares at $16.80 per share.  The aggregate proceeds of
approximately $140,310,000 will be used for general corporate purposes.

   On August 18, 1998, the Company consummated its initial public offering of
common stock at a price to the public of $13.00 per share (the "IPO").  The
Company sold 12,320,000 shares of its common stock and received proceeds of
$151,043,000 (after underwriting discounts of $9,117,000 but before other
expenses of the IPO, which amounted to approximately $4,116,000).  The net
proceeds from the IPO were used to pay a portion of the purchase price for the
Crown Atlantic transaction (see Note 2).

                                       81
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   In anticipation of the IPO, the Company (1) amended and restated the 1995
Stock Option Plan to, among other things, authorize the issuance of up to
18,000,000 shares of common stock pursuant to awards made thereunder; and (2)
approved an amendment to its certificate of incorporation to increase the number
of authorized shares of common and preferred stock to 690,000,000 shares and
10,000,000 shares, respectively, and to effect a five-for-one stock split for
the shares of common stock then outstanding.  The effect of the stock split has
been presented retroactively in the Company's consolidated financial statements
for all periods presented.

   In July 1998, all of the holders of the Company's Senior Convertible
Preferred Stock converted such shares into an aggregate of 9,629,200 shares of
the Company's common stock.  Upon consummation of the IPO, all of the holders of
the Company's then-existing shares of Class A Common Stock, Class B Common
Stock, Series A Convertible Preferred Stock, Series B Convertible Preferred
Stock and Series C Convertible Preferred Stock converted such shares into an
aggregate of 39,842,290 shares of the Company's common stock.

   In March 1997, the Company repurchased, and subsequently retired, 814,790
shares of its common stock from a member of the Company's Board of Directors at
a cost of approximately $3,422,000. Of this amount, $1,311,000 was recorded as
compensation cost and is included in corporate development expense on the
Company's consolidated statement of operations. In August 1998, the Company
repurchased, and subsequently retired, 141,070 shares of its common stock from a
former employee at a cost of approximately $883,000.

   Class A Common Stock
   Upon consummation of the share exchange agreement with CCUK's shareholders
(see Note 2), TdF received all of the currently outstanding shares of the
Company's Class A Common Stock.  Each share of Class A Common Stock is
convertible, at the option of its holder at any time, into one share of Common
Stock.  The holder of the Class A Common Stock is entitled to one vote per share
on all matters presented to a vote of the Company's shareholders, except with
respect to the election of directors.  The holder of the Class A Common Stock,
voting as a separate class, has the right to elect up to two members of the
Company's Board of Directors. The shares of Class A Common Stock also provide
certain governance and anti-dilutive rights.

   Compensation Charges Related to Stock Option Grants
   During the period from April 24, 1998 through July 15, 1998, the Company
granted options to employees and executives for the purchase of 3,236,980 shares
of its common stock at an exercise price of $7.50 per share. Of such options,
options for 1,810,730 shares vested upon consummation of the IPO and the
remaining options for 1,426,250 shares will vest at 20% per year over five
years, beginning one year from the date of grant. In addition, the Company has
assigned its right to repurchase shares of its common stock from a stockholder
(at a price of $6.26 per share) to two individuals (including a newly-elected
director) with respect to 100,000 of such shares. Since the granting of these
options and the assignment of these rights to repurchase shares occurred
subsequent to the date of the share exchange agreement with CCUK's shareholders
and at prices substantially below the price to the public in the IPO, the
Company has recorded a non-cash compensation charge related to these options and
shares based upon the difference between the respective exercise and purchase
prices and the price to the public in the IPO. Such compensation charge will
total approximately $18,400,000, of which approximately $10,600,000 was
recognized upon consummation of the IPO (for such options and shares which
vested upon consummation of the IPO), and the remaining $7,800,000 is being
recognized over five years (approximately $1,600,000 per year) through the
second quarter of 2003. An additional $1,600,000 in non-cash compensation
charges will be recognized through the third quarter of 2001 for stock options
issued to certain members of CCUK's management prior to the consummation of the
share exchange.

                                       82
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   Stock Options
   In 1995, the Company adopted the Crown Castle International Corp. 1995 Stock
Option Plan (as amended, the "1995 Stock Option Plan"). Up to 28,000,000 shares
of the Company's common stock have been reserved for awards granted to certain
employees, consultants and non-employee directors of the Company and its
subsidiaries or affiliates. These options generally vest over periods of up to
five years from the date of grant (as determined by the Company's Board of
Directors) and have a maximum term of 10 years from the date of grant.

   Upon consummation of the share exchange agreement with CCUK's shareholders
(see Note 2), the Company adopted each of the various CCUK stock option plans.
All outstanding options to purchase shares of CCUK under such plans have been
converted into options to purchase shares of the Company's common stock. Up to
4,392,451 shares of the Company's common stock were reserved for awards granted
under the CCUK plans, and these options generally vest over periods of up to
three years from the date of grant.

   A summary of awards granted under the various stock option plans is as
follows for the years ended December 31, 1997, 1998 and 1999:
<TABLE>
<CAPTION>

                                      1997                      1998                      1999
                            ----------------------     ----------------------    -----------------------
                                        Weighted-                  Weighted-                   Weighted-
                                         Average                    Average                     Average
                            Number of    Exercise     Number of    Exercise      Number of      Exercise
                              Shares      Price        Shares       Price          Shares        Price
                            ----------  -----------   -----------   ---------    ---------     ---------
<S>                         <C>          <C>         <C>           <C>         <C>           <C>         <C>
Options outstanding at
 beginning of year......    1,050,000        $0.89    3,694,375       $ 4.69   16,585,197       $ 7.06
Options granted.........    3,042,500         5.46    9,024,720        10.02    4,661,649        18.68
Options outstanding
 under CCUK stock
 option plans...........           --           --    4,367,202         2.74           --           --
Options exercised.......     (363,125)        0.53     (216,650)        4.89   (1,482,066)        5.82
Options forfeited.......      (35,000)        1.20     (284,450)        5.72     (538,704)        9.17
                            ---------                ----------                ----------
Options outstanding at
 end of year............    3,694,375         4.69   16,585,197         7.06   19,226,076         9.89
                            =========                ==========                ==========
Options exercisable at
 end of year............      728,875         2.49    7,615,649         4.75   11,590,217         8.14
                            =========                ==========                ==========
</TABLE>


   In August 1998, certain outstanding options became fully or partially vested
upon consummation of the IPO.  A summary of options outstanding as of December
31, 1999 is as follows:

                                       83
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATMENTS (CONTINUED)

<TABLE>
<CAPTION>
                                            Weighted-
                                             Average
                              Number of      Remaining         Number of
       Exercise                 Options     Contractual          Options
        Prices                Outstanding      Life            Exercisable
- -----------------------       -----------    -----------       -----------
<S>        <C>   <C>          <C>            <C>               <C>
$  -0-     to    $ 1.60           729,107     6.0 years           644,415
  2.31     to      3.90         3,541,171     6.8 years         1,977,850
  4.01     to      5.97         1,616,592     7.7 years         1,535,925
  7.50     to      7.77         4,789,021     8.3 years         3,244,029
 10.04     to     12.50           436,418     8.9 years            93,084
                  13.00         3,415,000     8.6 years         3,415,000
 15.13     to     17.63         1,286,000     9.7 years            25,000
 18.00     to     19.94         2,003,822     9.3 years           546,986
 20.06     to     22.28         1,289,111     9.2 years           107,928
 23.69     to     25.62           119,834     9.5 years                --
                                ---------                       ---------
                               19,226,076                      11,590,217
                               ===========                     ===========
</TABLE>

   The weighted-average fair value of options granted during the years ended
December 31, 1997, 1998 and 1999 was $1.30, $4.54 and $6.76, respectively.  The
fair value of each option was estimated on the date of grant using the Black-
Scholes option-pricing model and the following weighted-average assumptions
about the options (the minimum value method was used prior to the IPO):

<TABLE>
<CAPTION>
                                   Years Ended December 31,
                             ------------------------------------
                                1997         1998         1999
                             ----------   ----------   ----------
<S>                          <C>          <C>          <C>
Risk-free interest rate.....       6.1%        5.38%        5.41%
Expected life............... 4.5 years    3.6 years    4.9 years
Expected volatility.........         0%    0% to 30%         30 %
Expected dividend yield.....         0%           0%          0 %
</TABLE>

   The exercise prices for options granted during the years ended December 31,
1997 and 1999 were equal to or in excess of the estimated fair value of the
Company's common stock at the date of grant. As such, no compensation cost was
recognized for stock options during those years (see Note 1 and "Compensation
Charges Related to Stock Option Grants"). If compensation cost had been
recognized for stock options based on their fair value at the date of grant, the
Company's pro forma net loss for the years ended December 31, 1997, 1998 and
1999 would have been $12,586,000 ($2.37 per share), $75,660,000 ($1.91 per
share) and $113,633,000 ($1.08 per share), respectively. The pro forma effect of
stock options on the Company's net loss for those years may not be
representative of the pro forma effect for future years due to the impact of
vesting and potential future awards.

   Shares Reserved For Issuance
   At December 31, 1999, the Company had the following shares reserved for
future issuance:

<TABLE>
<CAPTION>
Common Stock:
<S>                                                                <C>
 Class A Common Stock............................................. 11,340,000
 Shares of CCUK stock which are convertible into common stock..... 17,443,500
 Convertible Preferred Stock......................................  7,441,860
 Stock option plans............................................... 30,330,610
 Warrants.........................................................  2,194,990
                                                                   ----------
                                                                   68,750,960
                                                                   ==========
</TABLE>

                                       84
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


10.  EMPLOYEE BENEFIT PLANS

   The Company and its subsidiaries have various defined contribution savings
plans covering substantially all employees.  Depending on the plan, employees
may elect to contribute up to 15% of their eligible compensation.  Certain of
the plans provide for partial matching of such contributions.  The cost to the
Company for these plans amounted to $98,000, $197,000 and $836,000 for the years
ended December 31, 1997, 1998 and 1999, respectively.

   CCUK has a defined benefit plan which covers all of its employees hired on or
before March 1, 1997. Employees hired after that date are not eligible to
participate in this plan.  The net periodic pension cost attributable to this
plan for the four months ended December 31, 1998 and the year ended December 31,
1999 was $1,115,000 and $3,592,000, respectively.  As of December 31, 1998 and
1999, (1) the projected benefit obligation amounted to $15,298,000 and
$18,169,000, respectively; (2) the fair value of the plan's assets amounted to
$15,848,000 and $22,449,000, respectively; and (3) the prepaid pension cost
attributable to this plan amounted to $1,704,000 and $1,454,000, respectively.

11.  RELATED PARTY TRANSACTIONS

   Included in other receivables at December 31, 1998 and 1999 are amounts due
from employees of the Company totaling $368,000 and $312,000, respectively.

12.  COMMITMENTS AND CONTINGENCIES

   At December 31, 1999, minimum rental commitments under operating leases are
as follows: years ending December 31, 2000 - $70,477,000; 2001 - $67,261,000;
2002 - $61,770,000; 2003 - $54,625,000; 2004 - $49,111,000; thereafter -
$233,217,000.  Rental expense for operating leases was $1,712,000, $9,620,000
and $47,300,000 for the years ended December 31, 1997, 1998 and 1999,
respectively.

   The Company is involved in various claims, lawsuits and proceedings arising
in the ordinary course of business.  While there are uncertainties inherent in
the ultimate outcome of such matters and it is impossible to presently determine
the ultimate costs that may be incurred, management believes the resolution of
such uncertainties and the incurrence of such costs should not have a material
adverse effect on the Company's consolidated financial position or results of
operations.

13.  OPERATING SEGMENTS AND CONCENTRATIONS OF CREDIT RISK

   Operating Segments
   The Company's reportable operating segments for 1999 are (1) the domestic
operations other than Crown Atlantic ("CCUSA"); (2) the United Kingdom
operations of CCUK; and (3) the operations of Crown Atlantic. Financial results
for the Company are reported to management and the Board of Directors in this
manner, and much of the Company's current debt financing is structured along
these geographic and organizational lines. See Note 1 for a description of the
primary revenue sources from these segments.

   As discussed in Note 2, CCUK's and Crown Atlantic's results of operations are
included in the Company's consolidated financial statements beginning in 1998
and 1999, respectively.  Prior to that time, the domestic operations of CCUSA
represented the Company's only reportable segment.

                                       85
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)



   The measurement of profit or loss currently used to evaluate the results of
operations for the Company and its operating segments is earnings before
interest, taxes, depreciation and amortization ("EBITDA"). The Company defines
EBITDA as operating income (loss) plus depreciation and amortization, non-cash
compensation charges and restructuring charges. EBITDA is not intended as an
alternative measure of operating results or cash flow from operations (as
determined in accordance with generally accepted accounting principles), and the
Company's measure of EBITDA may not be comparable to similarly titled measures
of other companies. There are no significant revenues resulting from
transactions between the Company's operating segments. Total assets for the
Company's operating segments are determined based on the separate consolidated
balance sheets for CCUSA, CCUK and Crown Atlantic. The results of operations and
financial position for CCUK reflect appropriate adjustments for their
presentation in accordance with generally accepted accounting principles in the
United States. The financial results for the Company's operating segments are as
follows:

<TABLE>
<CAPTION>
                                                                 Year Ended December 31, 1999
                                          -------------------------------------------------------------------
                                                                                  Corporate
                                                                        Crown       Office        Consolidated
                                             CCUSA          CCUK       Atlantic    and Other        Total
                                          ------------   ----------   ----------  -------------    ----------
<S>                                       <C>            <C>          <C>          <C>          <C>
                                                              (In thousands of dollars)
Net revenues:
 Site rental and broadcast...............  $   58,293     $171,981     $ 37,620    $     --       $  267,894
  transmission
 Network services and other..............      44,413       21,713       10,268        1,471          77,865
                                           ----------     --------     --------     --------      ----------
                                              102,706      193,694       47,888        1,471         345,759
                                           ----------     --------     --------     --------      ----------
Costs of operations (exclusive of
 depreciation and amortization)..........      41,648       93,058       20,953        1,089         156,748
General and administrative...............      27,988        5,625        5,146        5,064          43,823
Corporate development....................          --          819           --        4,584           5,403
                                           ----------     --------     --------     --------      ----------
EBITDA...................................      33,070       94,192       21,789       (9,266)        139,785
Restructuring charges....................       5,645           --           --           --           5,645
Non-cash compensation charges............          67          769           --        1,337           2,173
Depreciation and amortization............      41,174       63,597       24,155        1,180         130,106
                                           ----------     --------     --------     --------      ----------
Operating income (loss)..................     (13,816)      29,826       (2,366)     (11,783)          1,861
Interest and other income (expense)......        (155)         377        4,577       12,932          17,731
Interest expense and amortization of
 deferred financing costs................      (4,119)     (28,334)     (12,233)     (66,222)       (110,908)
Provision for income taxes...............         (56)          --           --         (219)           (275)
Minority interests.......................          --       (3,835)       1,079           --          (2,756)
Cumulative effect of change in
 accounting principle for costs of
 start-up activities.....................      (2,014)          --           --         (400)         (2,414)
                                           ----------     --------     --------     --------      ----------
Net loss.................................  $  (20,160)    $ (1,966)    $ (8,943)    $(65,692)     $  (96,761)
                                           ==========     ========     ========     ========      ==========
Capital expenditures.....................  $  118,961     $150,562     $ 23,287     $    991      $  293,801
                                           ==========     ========     ========     ========      ==========
Total assets (at year end)...............  $1,544,969     $989,060     $712,019     $590,602      $3,836,650
                                           ==========     ========     ========     ========      ==========
</TABLE>

                                       86
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

<TABLE>
<CAPTION>

                                                                     Year Ended December 31, 1998
                                                        ----------------------------------------------------
                                                                                   Corporate
                                                                                     Office        Consolidated
                                                          CCUSA         CCUK        and Other         Total
                                                        ----------   ----------   -------------     ----------
<S>                                                     <C>          <C>          <C>          <C>
                                                                     (In thousands of dollars)
Net revenues:
 Site rental and broadcast transmission................  $ 22,541     $ 52,487    $  --          $   75,028
 Network services and other............................    31,471        5,568        1,011          38,050
                                                         --------     --------     --------      ----------
                                                           54,012       58,055        1,011         113,078
                                                         --------     --------     --------      ----------
Costs of operations (exclusive of depreciation and
 amortization).........................................    23,076       24,372          370          47,818
General and administrative.............................    17,929        2,418        3,224          23,571
Corporate development..................................        --           --        4,625           4,625
                                                         --------     --------     --------      ----------
EBITDA.................................................    13,007       31,265       (7,208)         37,064
Non-cash compensation charges..........................       132        2,851        9,775          12,758
Depreciation and amortization..........................    16,202       20,318          719          37,239
                                                         --------     --------     --------      ----------
Operating income (loss)................................    (3,327)       8,096      (17,702)        (12,933)
Equity in earnings of unconsolidated affiliate.........        --           --        2,055           2,055
Interest and other income (expense)....................      (253)         294        4,179           4,220
Interest expense and amortization of deferred..........    (4,476)      (7,362)     (17,251)        (29,089)
 financing costs
Provision for income taxes.............................      (374)          --           --            (374)
Minority interests.....................................        --       (1,654)          --          (1,654)
                                                         --------     --------     --------      ----------
Net loss...............................................  $ (8,430)    $   (626)    $(28,719)     $  (37,775)
                                                         ========     ========     ========      ==========
Capital expenditures...................................  $ 84,911     $ 50,224     $  3,624      $  138,759
                                                         ========     ========     ========      ==========
Total assets (at year end).............................  $332,555     $887,938     $302,737      $1,523,230
                                                         ========     ========     ========      ==========
</TABLE>

<TABLE>
<CAPTION>
                                                                           Year Ended December 31, 1997
                                                                      --------------------------------------
                                                                                   Corporate
                                                                                    Office          Consolidated
                                                                        CCUSA      and Other           Total
                                                                      ---------    -------------     ----------
         <S>                                                                   <C>         <C>          <C>
                                                                            (In thousands of dollars)
Net revenues:
 Site rental and broadcast transmission..............................  $11,010    $  --            $ 11,010
 Network services and other..........................................   20,066          329          20,395
                                                                       -------      -------        --------
                                                                        31,076          329          31,405
                                                                       -------      -------        --------
Costs of operations (exclusive of depreciation and amortization).....   15,350           --          15,350
General and administrative...........................................    6,675          149           6,824
Corporate development................................................    1,864        3,867           5,731
                                                                       -------      -------        --------
EBITDA...............................................................    7,187       (3,687)          3,500
Depreciation and amortization........................................    6,925           27           6,952
                                                                       -------      -------        --------
Operating income (loss)..............................................      262       (3,714)         (3,452)
Equity in losses of unconsolidated affiliate.........................       --       (1,138)         (1,138)
Interest and other income (expense)..................................      (77)       2,028           1,951
Interest expense and amortization of deferred financing costs........   (4,660)      (4,594)         (9,254)
Provision for income taxes...........................................       --          (49)            (49)
                                                                       -------      -------        --------
Net loss.............................................................  $(4,475)     $(7,467)       $(11,942)
                                                                       =======      =======        ========
Capital expenditures.................................................  $17,200      $   835        $ 18,035
                                                                       =======      =======        ========
</TABLE>

                                       87
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   Geographic Information
   A summary of net revenues by country, based on the location of the Company's
 subsidiary, is as follows:

<TABLE>
<CAPTION>
                                          Years Ended December 31,
                                      --------------------------------
                                        1997       1998        1999
                                      --------   ---------   ---------
<S>                                   <C>        <C>         <C>
                                         (In thousands of dollars)
United States........................  $29,076    $ 51,807    $147,679
Puerto Rico..........................    2,329       2,470       2,915
                                       -------    --------    --------
 Total domestic operations...........   31,405      54,277     150,594
                                       -------    --------    --------
United Kingdom.......................       --      58,055     193,655
Other foreign countries..............       --         746       1,510
                                       -------    --------    --------
 Total for all foreign countries.....       --      58,801     195,165
                                       -------    --------    --------
                                       $31,405    $113,078    $345,759
                                       =======    ========    ========
</TABLE>

   A summary of long-lived assets by country of location is as follows:

<TABLE>
<CAPTION>
                                            December 31,
                                      -------------------------
                                         1998          1999
                                      -----------   -----------
<S>                                   <C>           <C>
                                      (In thousands of dollars)
United States......................... $  310,953    $2,220,468
Puerto Rico...........................     14,473        21,191
                                       ----------    ----------
 Total domestic operations............    325,426     2,241,659
                                       ----------    ----------
United Kingdom........................    855,560       925,424
Other foreign countries...............        128         7,522
                                       ----------    ----------
 Total for all foreign countries......    855,688       932,946
                                       ----------    ----------
                                       $1,181,114    $3,174,605
                                       ==========    ==========
</TABLE>

   Major Customers
   For the years ended December 31, 1997, 1998 and 1999, CCUSA had revenues from
a single customer amounting to $5,998,000, $14,168,000 and $16,872,000,
respectively.  For the years ended December 31, 1998 and 1999, consolidated net
revenues include $33,044,000 and $97,520,000, respectively, from a single
customer of CCUK.

   Concentrations of Credit Risk
   Financial instruments that potentially subject the Company to concentrations
of credit risk are primarily cash and cash equivalents and trade receivables.
The Company mitigates its risk with respect to cash and cash equivalents by
maintaining such deposits at high credit quality financial institutions and
monitoring the credit ratings of those institutions.

   The Company derives the largest portion of its revenues from customers in the
wireless telecommunications industry.  In addition, the Company has
concentrations of operations in certain geographic areas (including the United
Kingdom and various regions in the United States).  The Company mitigates its
concentrations of credit risk with respect to trade receivables by actively
monitoring the creditworthiness of its customers.  Historically, the Company has
not incurred any significant credit related losses.

14. RESTRUCTURING CHARGES

   In connection with the formation of Crown Atlantic (see Note 2), the Company
completed a restructuring of its United States operations during the first
quarter of 1999.  The objective of this restructuring was to transition from a
centralized organization to a regionally-based organization in the United
States.  Coincident

                                       88
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


with the restructuring, the Company incurred one-time charges of $1,814,000
related to severance payments for staff reductions, as well as costs related to
non-cancelable leases of excess office space. At December 31, 1999, other
accrued liabilities includes $331,000 related to these charges.

   The Company completed a restructuring of its TeleStructures, Inc. operations
in December 1999. The objective of this restructuring was to reduce the size of
the TeleStructures, Inc. staff to a level which could be justified by its
current operating volume. In connection with this restructuring, the Company
incurred one-time charges totaling $3,831,000 related to severance payments for
the staff reductions, the recognition of an impairment loss for the remaining
goodwill from the acquisition (see Note 2) and other related costs. At December
31, 1999, other accrued liabilities includes $1,309,000 related to these
charges.

15.  QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

   Summary quarterly financial information for the years ended December 31, 1998
and 1999 is as follows:

<TABLE>
<CAPTION>
                                                                    Three Months Ended
                                                   ----------------------------------------------------
                                                   March 31     June 30    September 30    December 31
                                                   ---------   ---------   -------------   ------------
<S>                                                <C>         <C>         <C>             <C>
                                                   (In thousands of dollars, except per share amounts)
1998:
 Net revenues....................................  $ 11,837    $ 11,530        $ 28,894       $ 60,817
 Operating income (loss).........................    (2,494)     (2,197)        (12,006)         3,764
 Net loss........................................    (6,606)     (6,426)        (17,444)        (7,299)
 Loss per common share--basic and diluted........     (0.79)      (0.78)          (0.33)         (0.09)

1999:
 Net revenues....................................  $ 55,109    $ 77,527        $ 98,927       $114,196
 Operating income (loss).........................    (1,715)      1,124             202          2,250
 Loss before cumulative effect of change in
  accounting principle...........................   (13,473)    (20,850)        (27,067)       (32,957)
 Cumulative effect of change in accounting
  principle......................................    (2,414)         --              --             --
 Net loss........................................   (15,887)    (20,850)        (27,067)       (32,957)
 Per common share - basic and diluted:
   Loss before cumulative effect of change in
    accounting principle.........................     (0.21)      (0.22)          (0.23)         (0.27)
   Cumulative effect of change in accounting
    principle....................................     (0.03)         --              --             --
   Net loss......................................     (0.24)      (0.22)          (0.23)         (0.27)
</TABLE>


16.      SUBSEQUENT EVENTS (UNAUDITED)

         Crown Castle GT
   On January 31, 2000, the formation of Crown Castle GT took place with the
first closing of towers (see Note 2).  The Company contributed $223,870,000 in
cash to Crown Castle GT, and GTE contributed 637 towers in exchange for a cash
distribution of $198,870,000 from Crown Castle GT.

                                       89
<PAGE>

               CROWN CASTLE INTERNATIONAL CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

   BellSouth and BellSouth DCS
   On February 2, 2000, the Company closed on an additional 90 of the BellSouth
towers (see Note 2).  In connection with this closing, the Company paid
$20,437,000 in cash and issued 441,925 shares of its common stock.  On the same
date, the Company closed on an additional 26 of the BellSouth DCS towers (see
Note 2). In connection with this closing, the Company paid $10,662,000 in cash.

   Crown Castle Australia Limited ("CCAL")
   In March 2000, CCAL (a 66.7% owned subsidiary of the Company) entered into an
agreement to purchase approximately 700 towers in Australia from Cable &
Wireless Optus. The total purchase price for the towers will be approximately
$135,000,000 in cash (Australian $220,000,000), and the purchase is expected to
close in the second quarter of 2000. The Company will account for its investment
in CCAL as a purchase of tower assets, and will include CCAL's results of
operations and cash flows in the Company's consolidated financial statements for
periods subsequent to the purchase date.

   Bank Credit Facility
   In March 2000, a subsidiary of the Company entered into a credit agreement
with a syndicate of banks (the "2000 Credit Facility") which consists of two
term loan facilities and a revolving line of credit aggregating $1,200,000,000.
Available borrowings under the 2000 Credit Facility are generally to be used for
the construction and purchase of towers and for general corporate purposes of
CCUSA, Crown Castle GT and CCAL.  The amount of available borrowings will be
determined based on the current financial performance (as defined) of those
subsidiaries' assets.  In addition, up to $25,000,000 of borrowing availability
under the 2000 Credit Facility can be used for letters of credit.  The 2000
Credit Facility is secured by substantially all of the assets of CCUSA and CCAL,
and the Company's pledge of the capital stock of those subsidiaries and Crown
Castle GT.  In addition, the 2000 Credit Facility is guaranteed by CCIC.  The
2000 Credit Facility requires the borrowers to maintain certain financial
covenants and includes restrictive covenants similar to those in the Senior
Credit Facility (see Note 5).

   On March 15, 2000, the Company used $83,375,000 in borrowings under the 2000
Credit Facility to repay outstanding borrowings and accrued interest under the
Senior Credit Facility.  The net proceeds from $316,625,000 in additional
borrowing will be used to fund a portion of the purchase price for Crown Castle
GT and for general corporate purposes.  In the first quarter of 2000, CCI will
record an extraordinary loss of approximately $1,653,000 consisting of the
write-off of unamortized deferred financing costs related to the Senior Credit
Facility.


ITEM 9.     CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
            FINANCIAL DISCLOSURE

   None.

                                       90
<PAGE>

                                    PART III


ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

   The information required to be furnished pursuant to this item will be set
forth in the 2000 Proxy Statement and is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

   The information required to be furnished pursuant to this item will be set
forth in the 2000 Proxy Statement and is incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

   The information required to be furnished pursuant to this item will be set
forth in the 2000 Proxy Statement and is incorporated herein by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

   The information required to be furnished pursuant to this item will be set
forth in the 2000 Proxy Statement and is incorporated herein by reference.

                                       91
<PAGE>

                                    PART IV


ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

   (a)(1)  FINANCIAL STATEMENTS:

      The list of financial statements filed as part of this report is submitted
 as a separate section, the index to which is located on page 56.

   (a)(2) FINANCIAL STATEMENT SCHEDULE:

      Schedule I--Condensed Financial Information of Registrant follows this
 Part IV.  All other schedules are omitted because they are not applicable or
 because the required information is contained in the financial statements or
 notes thereto included in this Form 10-K.

   (a)(3)  EXHIBITS:

      The Exhibits listed on the accompanying Index to Exhibits are filed as
 part of this Annual Report on Form 10-K.

   (b)   REPORTS ON FORM 8-K:

      During the fourth quarter of 1999 we filed the following Reports on Form
 8-K:

      The Registrant filed a Current Report on Form 8-K dated September 14, 1999
 and filed with the SEC on October 12, 1999 reporting (1) under Item 5 thereof
 the execution of an agreement with GECC under which GECC has agreed to purchase
 shares of the Company's Convertible Preferred Stock, and (2) under Item 7
 thereof certain pro forma financial statements for the Company.

      The Registrant filed a Current Report on Form 8-K dated November 7, 1999
 and filed with the SEC on November 12, 1999 reporting under Item 5 thereof the
 execution of an agreement to form a joint venture with GTE.

      The Registrant filed a Current Report on Form 8-K dated November 19, 1999
 and filed with the SEC on December 13, 1999 reporting under Item 5 thereof the
 sale of the Company's Convertible Preferred Stock to GECC.

                                       92
<PAGE>

                         INDEPENDENT AUDITORS' REPORT

The Board of Directors
  Crown Castle International Corp.:

Under date of February 22, 2000, we reported on the consolidated balance sheets
of Crown Castle International Corp. and subsidiaries as of December 31, 1999 and
1998 and the related consolidated statements of operations and comprehensive
loss, cash flows and stockholders' equity (deficit) for each of the years in the
three-year period ended December 31, 1999 as contained in the annual report on
Form 10-K for the year ended 1999. In connection with our audits of the
aforementioned consolidated financial statements, we also audited the related
consolidated financial statement schedule as listed in the accompanying index.
This financial statement schedule is the responsibility of the Company's
management. Our responsibility is to express an opinion on this financial
statement schedule based on our audits.

In our opinion, such financial statement schedule, when considered in relation
to the basic consolidated financial statements taken as a whole, presents
fairly, in all material respects, the information set forth therein.

                                      KPMG LLP

Houston, Texas
February 22, 2000

                                      93
<PAGE>


                        CROWN CASTLE INTERNATIONAL CORP.

           SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT

                         BALANCE SHEET (UNCONSOLIDATED)
                (IN THOUSANDS OF DOLLARS, EXCEPT SHARE AMOUNTS)


<TABLE>
<CAPTION>
                                                                                          December 31,
                                                                                   ---------------------------
                                                                                       1998           1999
                                                                                   ------------   ------------
<S>                                                                                <C>            <C>
             ASSETS
Current assets:
 Cash and cash equivalents........................................................  $   37,907     $  489,886
 Receivables and other current assets.............................................         957            982
 Advances to subsidiaries, net....................................................      13,711         98,020
                                                                                    ----------     ----------
    Total current assets..........................................................      52,575        588,888
Property and equipment, net of accumulated depreciation of $875 and $2,053 at
 December 31, 1998 and 1999, respectively.........................................       4,255          4,040
Escrow deposit for acquisition....................................................          --         50,000
Investment in subsidiaries........................................................   1,041,788      2,334,508
Deferred financing costs and other assets, net of accumulated amortization of
 $814 and $2,609 at December 31, 1998 and 1999, respectively......................       9,485         44,668
                                                                                    ----------     ----------
                                                                                    $1,108,103     $3,022,104
                                                                                    ==========     ==========
      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
 Accounts payable and other accrued liabilities...................................  $    1,379     $    4,339
 Accrued interest.................................................................          --          6,907
                                                                                    ----------     ----------
    Total current liabilities.....................................................       1,379         11,246
Long-term debt....................................................................     168,099        970,188
                                                                                    ----------     ----------
    Total liabilities.............................................................     169,478        981,434
                                                                                    ----------     ----------
Redeemable preferred stock, $.01 par value; 10,000,000 shares authorized:
 12 3/4% Senior Exchangeable Preferred Stock; shares issued: December 31,
  1998 - 200,000 and December 31, 1999 - 226,745 (stated at mandatory
  redemption and aggregate liquidation value).....................................     201,063        227,950
 8 1/4% Cumulative Convertible Redeemable Preferred Stock; shares issued:
  December 31, 1998 - none and December 31, 1999 - 200,000 (stated net of
  unamortized value of warrants; mandatory redemption and aggregate
  liquidation value of $200,000)..................................................          --        194,973
                                                                                    ----------     ----------
    Total redeemable preferred stock..............................................     201,063        422,923
                                                                                    ----------     ----------
Stockholders' equity:
 Common stock, $.01 par value; 690,000,000 shares authorized:
   Common Stock; shares issued: December 31, 1998 - 83,123,873 and
    December 31, 1999 - 146,074,905...............................................         831          1,461
   Class A Common Stock; shares issued: 11,340,000................................         113            113
 Additional paid-in capital.......................................................     795,153      1,805,053
 Cumulative foreign currency translation adjustment...............................       1,690         (3,013)
 Accumulated deficit..............................................................     (60,225)      (185,867)
                                                                                    ----------     ----------
      Total stockholders' equity..................................................     737,562      1,617,747
                                                                                    ----------     ----------
                                                                                    $1,108,103     $3,022,104
                                                                                    ==========     ==========
</TABLE>

    See notes to consolidated financial statements and accompanying notes.

                                       94

<PAGE>

                        CROWN CASTLE INTERNATIONAL CORP.

     SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONTINUED)

                    STATEMENT OF OPERATIONS (UNCONSOLIDATED)
                           (IN THOUSANDS OF DOLLARS)


<TABLE>
<CAPTION>
                                                                            Years Ended December 31,
                                                                      -------------------------------------
                                                                         1997         1998         1999
                                                                      ----------   ----------   -----------
<S>                                                                   <C>          <C>          <C>
Other revenues....................................................     $    329     $    399    $      --
Interest and other income (expense)...............................        2,028        1,354        12,852
General and administrative expenses...............................         (149)      (2,975)       (5,002)
Corporate development expenses....................................       (3,867)      (4,404)       (4,579)
Non-cash compensation charges.....................................           --       (9,775)       (1,337)
Depreciation and amortization.....................................          (27)        (720)       (1,178)
Interest expense and amortization of deferred financing costs.....       (4,594)     (17,251)      (66,222)
                                                                       --------     --------     ---------
Loss before income taxes, equity in earnings (losses) of
 subsidiaries and unconsolidated affiliate and cumulative effect
 of change in accounting principle................................       (6,280)     (33,372)      (65,466)
Provision for income taxes........................................          (49)          --            --
Equity in earnings (losses) of subsidiaries.......................       (4,475)      (6,458)      (30,985)
Equity in earnings (losses) of unconsolidated affiliate...........       (1,138)       2,055            --
                                                                       --------     --------     ---------
Loss before cumulative effect of change in accounting principle...      (11,942)     (37,775)      (96,451)
Cumulative effect of change in accounting principle for costs of
 start-up activities..............................................           --           --          (310)
                                                                        --------     --------     ---------
Net loss..........................................................      (11,942)     (37,775)      (96,761)
Dividends on preferred stock......................................       (2,199)      (5,411)      (28,881)
                                                                       --------     --------     ---------
Net loss after deduction of dividends on preferred stock..........     $(14,141)    $(43,186)    $(125,642)
                                                                       ========     ========     =========
</TABLE>

    See notes to consolidated financial statements and accompanying notes.

                                       95

<PAGE>


                        CROWN CASTLE INTERNATIONAL CORP.

     SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONTINUED)

                    STATEMENT OF CASH FLOWS (UNCONSOLIDATED)
                           (IN THOUSANDS OF DOLLARS)

<TABLE>
<CAPTION>
                                                                               Years Ended December 31,
                                                                        --------------------------------------
                                                                           1997         1998          1999
                                                                        ----------   ----------   ------------
<S>                                                                     <C>          <C>          <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
 Net loss.............................................................. $ (11,942)   $ (37,775)   $   (96,761)
 Adjustments to reconcile net loss to net cash used for operating
  activities:
   Amortization of deferred financing costs and discounts on long-
    term debt..........................................................     1,652       17,251         46,703
   Equity in losses of subsidiaries....................................     4,475        6,458         30,985
   Non-cash compensation charges.......................................        --        9,775          1,337
   Depreciation and amortization.......................................        27          720          1,178
   Cumulative effect of change in accounting principle.................        --           --            310
   Equity in losses (earnings) of unconsolidated affiliate.............     1,138       (2,055)            --
   Increase in accrued interest........................................        --           --          6,907
   Increase (decrease) in accounts payable and other accrued
    liabilities........................................................      (103)       1,352          2,273
   Decrease (increase) in receivables and other assets.................       551       (1,413)       (10,052)
                                                                        ---------    ---------    -----------
    Net cash used for operating activities.............................    (4,202)      (5,687)       (17,120)
                                                                        ---------    ---------    -----------

CASH FLOWS FROM INVESTING ACTIVITIES:
 Investment in subsidiaries............................................   (89,989)    (332,065)      (930,082)
 Net advances to subsidiaries..........................................    (2,223)     (11,100)       (84,309)
 Escrow deposit for acquisition........................................        --           --        (50,000)
 Capital expenditures..................................................      (835)      (3,624)          (963)
 Sale of (investments in) affiliates...................................   (59,487)          --            739
                                                                        ---------    ---------    -----------
    Net cash used for investing activities.............................  (152,534)    (346,789)    (1,064,615)
                                                                        ---------    ---------    -----------

CASH FLOWS FROM FINANCING ACTIVITIES:
 Proceeds from issuance of capital stock...............................   139,867      339,929        805,771
 Proceeds from issuance of long-term debt..............................   150,010           --        757,206
 Incurrence of financing costs.........................................    (5,908)      (1,755)       (28,025)
 Dividends on preferred stock..........................................        --           --         (1,238)
 Purchase of capital stock.............................................    (2,132)        (883)            --
 Principal payments on long-term debt..................................   (78,102)          --             --
                                                                        ---------    ---------    -----------
    Net cash provided by financing activities..........................   203,735      337,291      1,533,714
                                                                        ---------    ---------    -----------

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS...................    46,999      (15,185)       451,979
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR.........................     6,093       53,092         37,907
                                                                        ---------    ---------    -----------
CASH AND CASH EQUIVALENTS AT END OF YEAR............................... $  53,092    $  37,907    $   489,886
                                                                        =========    =========    ===========

SUPPLEMENTARY SCHEDULE OF NONCASH INVESTING AND FINANCING
 ACTIVITIES:
 Issuance of common stock in connection with acquisitions.............. $  57,189    $ 420,964    $   397,710
 Issuance of long-term debt in connection with acquisitions............    78,102           --             --
 Conversion of subsidiary's Convertible Secured Subordinated Notes
  to Series A Convertible Preferred Stock..............................     3,657           --             --

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
 Interest paid......................................................... $   2,943    $      --    $    12,612
 Income taxes paid.....................................................        --           --             --
</TABLE>

    See notes to consoldiated financial statements and accompanying notes.

                                       96

<PAGE>

                        CROWN CASTLE INTERNATIONAL CORP.

     SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (CONTINUED)

                 NOTES TO FINANCIAL STATEMENTS (UNCONSOLIDATED)


1.    INVESTMENT IN SUBSIDIARIES

   The Company's investment in subsidiaries is presented in the accompanying
unconsolidated financial statements using the equity method of accounting.
Under the terms of the Senior Credit Facility, the CCUK Credit Facility, the
Crown Atlantic Credit Facility and the CCUK Bonds, the Company's subsidiaries
are limited in the amount of dividends which can be paid to the Company.  For
CCUSA, the amount of such dividends is limited to (1) $6,000,000 per year until
October 31, 2002, and $33,000,000 per year thereafter; and (2) an amount to pay
income taxes attributable to the Company's Restricted Subsidiaries.  CCUK and
Crown Atlantic are effectively precluded from paying dividends.  The restricted
net assets of the Company's subsidiaries totaled approximately $1,003,701,000 at
December 31, 1999.

2.    LONG-TERM DEBT

   Long-term debt consists of the Company's Debt Securities.

3.    INCOME TAXES

   Income taxes reported in the accompanying unconsolidated financial statements
are determined by computing income tax assets and liabilities on a consolidated
basis, for the Company and members of its consolidated federal income tax return
group, and then reducing such consolidated amounts for the amounts recorded by
the Company's subsidiaries on a separate tax return basis.

                                       97

<PAGE>

                               INDEX TO EXHIBITS
                                 Item 14(a)(3)

<TABLE>
<CAPTION>
  Exhibit
    No.                            Description of Exhibit
  -------   -------------------------------------------------------------------
 <C>        <S>
     ##2.1  Share Exchange Agreement among Castle Transmission Services
            (Holdings) Ltd., Crown Castle International Corp., TeleDiffusion de
            France International S.A., Digital Future Investments B.V. and
            certain shareholders of Castle Transmission Services (Holdings)
            Ltd. dated as of April 24, 1998
      *2.2  Formation Agreement, dated December 8, 1998, relating to the
            formation of Crown Atlantic Company LLC, Crown Atlantic Holding Sub
            LLC, and Crown Atlantic Holding Company LLC
     **2.3  Amendment Number 1 to Formation Agreement, dated March 31, 1999,
            among Crown Castle International Corp., Cellco Partnership, doing
            business as Bell Atlantic Mobile, certain Transferring Partnerships
            and CCA Investment Corp.
     **2.4  Crown Atlantic Company LLC Operating Agreement entered into as of
            March 31, 1999 by and between Cellco Partnership, doing business as
            Bell Atlantic Mobile, and Crown Atlantic Holding Sub LLC
    ***2.5  Agreement to Sublease dated June 1, 1999 by and among BellSouth
            Mobility Inc., BellSouth Telecommunications Inc., The Transferring
            Entities, Crown Castle International Corp. and Crown Castle South
            Inc.
    ***2.6  Sublease dated June 1, 1999 by and among BellSouth Mobility Inc.,
            Certain BMI Affiliates, Crown Castle International Corp. and Crown
            Castle South Inc.
       2.7  Agreement to Sublease dated August 1, 1999 by and among BellSouth
            Personal Communications, Inc., BellSouth Carolinas PCS, L.P., Crown
            Castle International Corp. and Crown Castle South Inc.
       2.8  Sublease dated August 1, 1999 by and among BellSouth Personal
            Communications, Inc., BellSouth Carolinas PCS, L.P., Crown Castle
            International Corp. and Crown Castle South Inc.
  *****2.9  Formation Agreement dated November 7, 1999 relating to the
            formation of Crown Castle GT Company LLC, Crown Castle GT Holding
            Sub LLC, and Crown Castle GT Holding Company LLC
  *****2.10 Letter Agreement dated November 7, 1999 between GTE Wireless
            Incorporated and Crown Castle International Corp.
       2.11 Operating Agreement, dated January 31, 2000, by and between Crown
            Castle GT Corp. and affiliates of GTE Wireless Incorporated
    ###3.1  Restated Certificate of Incorporation of Crown Castle International
            Corp., dated August 21, 1998
    ###3.2  Amended and Restated By-laws of Crown Castle International Corp.,
            dated August 21, 1998
    ###3.3  Certificate of Designations, Preferences and Relative,
            Participating, Optional and other Special Rights of Preferred Stock
            and Qualifications, Limitations and Restrictions thereof of 12 3/4%
            Senior Exchangeable Preferred Stock Due 2010 and 12 3/4% Series B
            Senior Exchangeable Preferred Stock Due 2010 of Crown Castle
            International Corp. filed with the Secretary of State of the State
            of Delaware on December 18, 1998
 ******3.4  Certificate of Designations, Preferences and Relative,
            Participating, Optional and Other Special Rights of Preferred Stock
            and Qualifications, Limitations and Restrictions thereof of Series
            A and Series B Cumulative Convertible Redeemable Preferred Stock of
            Crown Castle International Corp. filed with the Secretary of State
            of the State of Delaware on November 19, 1999
      #4.1  Trust Deed related to (Pounds)125,000,000 9% Guaranteed Bonds Due
            2007 among Castle Transmission (Finance) PLC, as Issuer, Castle
            Transmission International Ltd. and Castle Transmission Services
            (Holdings) Ltd., as Guarantors, and The Law Debenture Trust
            Corporation p.l.c., as Trustee, dated May 21, 1997
      #4.2  First Supplemental Trust Deed related to (Pounds)125,000,000 9%
            Guaranteed Bonds Due 2007 among Castle Transmission (Finance) PLC,
            as Issuer, Castle Transmission International Ltd. and Castle
            Transmission Services (Holdings) Ltd., as Guarantors, and The Law
            Debenture Trust Corporation p.l.c., as Trustee, dated October 17,
            1997


                                      98
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
  Exhibit
    No.                            Description of Exhibit
  -------   -------------------------------------------------------------------
 <C>        <S>
      #4.3  Indenture, dated as of November 25, 1997, between Crown Castle
            International Corp. and United States Trust Company of New York, as
            Trustee, relating to the 10 5/8% Senior Discount Notes Due 2007
            (including exhibits)
      #4.4  Article Fourth of Certificate of Incorporation of Castle Tower
            Holding Corp. (included in Exhibit 3.1)
     ##4.5  Specimen Certificate of Common Stock
    ###4.6  Indenture, dated as of December 21, 1998, between Crown Castle
            International Corp. and the United States Trust Company of New
            York, as Trustee, relating to the 12 3/4% Senior Subordinated
            Exchange Debentures Due 2010 (including exhibits)
   ####4.7  Indenture, dated as of May 17, 1999, between Crown Castle
            International Corp. and United States Trust Company of New York, as
            Trustee, relating to the 9% Senior Notes Due 2011 (including
            exhibits)
   ####4.8  Indenture, dated as of May 17, 1999, between Crown Castle
            International Corp. and United States Trust Company of New York, as
            Trustee, relating to the 10 3/8% Senior Discount Notes Due 2011
            (including exhibits)
    ***4.9  Registration Rights Agreement dated June 1, 1999 between BellSouth
            Mobility Inc. and Crown Castle International Corp.
   ####4.10 Indenture, dated as of August 3, 1999, between Crown Castle
            International Corp. and United States Trust Company of New York, as
            Trustee, relating to the 9 1/2% Senior Notes Due 2011 (including
            exhibits)
   ####4.11 Indenture, dated as of August 3, 1999, between Crown Castle
            International Corp. and United States Trust Company of New York, as
            Trustee, relating to the 11 1/4% Senior Discount Notes Due 2011
            (including exhibits)
 ******4.12 Deposit Agreement among Crown Castle International Corp. and the
            United States Trust Company of New York dated November 19, 1999
 ******4.13 Registration Rights Agreement among Crown Castle International
            Corp., the United States Trust Company of New York and SFG-P INC.
            dated November 19, 1999
 ******4.14 Warrant Agreement between Crown Castle International Corp. and the
            United States Trust Company of New York dated November 19, 1999
    ##10.1  Site Sharing Agreement between National Transcommunications Limited
            and The British Broadcasting Corporation dated September 10, 1991
    ##10.2  Transmission Agreement between The British Broadcasting Corporation
            and Castle Transmission Services Limited dated February 27, 1997
     #10.3  Services Agreement between Castle Transmission International Ltd.
            (formerly known as Castle Transmission Services Ltd.) and Castle
            Tower Holding Corp. dated February 28, 1997
    ##10.4  Agreement for the Provision of Digital Terrestrial Television
            Distribution and Transmission Services between British Digital
            Broadcasting plc and Castle Transmission International Ltd. dated
            December 18, 1997
    ##10.5  Digital Terrestrial Television Transmission Agreement between The
            British Broadcasting Corporation and Castle Transmission
            International Ltd. dated February 10, 1998
    ##10.6  Contract between British Telecommunications PLC and Castle
            Transmission International Inc. for the Provision of Digital
            Terrestrial Television Network Distribution Service dated May 13,
            1998
    ##10.7  Amending Agreement between the British Broadcasting Corporation and
            Castle Transmission International Limited dated July 16, 1998
    ##10.8  Commitment Agreement between the British Broadcasting Corporation,
            Castle Tower Holding Corp., TeleDiffusion de France International
            S.A. and TeleDiffusion de France S.A.
   ###10.9  Amended and Restated Services Agreement between Castle Transmission
            International Limited and TeleDiffusion de France S.A. dated August
            1998
    **10.10 Global Lease Agreement dated March 31, 1999 between Crown Atlantic
            Company LLC and Cellco Partnership, doing business as Bell Atlantic
            Mobile



                                      99
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
  Exhibit
    No.                           Description of Exhibit
  -------  --------------------------------------------------------------------
 <C>       <S>
   **10.11 Master Build to Suit Agreement dated March 31, 1999 between Cellco
           Partnership, doing business as BellAtlantic Mobile, and Crown
           Atlantic Company LLC
  ***10.12 Agreement to Build to Suit dated June 1, 1999 by and among BellSouth
           Mobility Inc., Crown Castle International Corp. and Crown Castle
           South Inc.
    #10.13 Castle Tower Holding Corp. 1995 Stock Option Plan (Third Restatement)
   ##10.14 Crown Castle International Corp. 1995 Stock Option Plan (Fourth
           Restatement)
   ##10.15 Castle Transmission Services (Holdings) Ltd. All Employee Share
           Option Scheme dated as of January 23, 1998
   ##10.16 Rules of the Castle Transmission Services (Holdings) Ltd. Bonus
           Share Plan
  ###10.17 Employee Benefit Trust between Castle Transmission Services
           (Holdings) Ltd. and Castle Transmission (Trustees) Limited
   ##10.18 Castle Transmission Services (Holdings) Ltd. Unapproved Share Option
           Scheme dated as of January 23, 1998
   ##10.19 Deed of Grant of Option between Castle Transmission Series
           (Holdings) Ltd. and George Reese dated January 23, 1998
   ##10.20 Deed of Grant of Option between Castle Transmission Services
           (Holdings) Ltd. and David Ivy dated January 23, 1998
   ##10.21 Deed of Grant of Option between Castle Transmission Services
           (Holdings) Ltd. and David Ivy dated April 23, 1998
   ##10.22 Deed of Grant of Option between Castle Transmission Services
           (Holdings) Ltd. and Ted B. Miller, Jr., dated April 23, 1998
   ##10.23 Deed of Grant of Option between Castle Transmission Services
           (Holdings) Ltd. and Ted B. Miller, Jr., dated January 23, 1998
   ##10.24 Agreement among Castle Transmission Services (Holdings) Ltd.,
           Digital Future Investments B.V., Berkshire Partners LLC and certain
           shareholders of Castle Transmission Services (Holdings) Ltd. for the
           sale and purchase of certain shares of Castle Transmission Services
           (Holdings) Ltd., for the amendment of the Shareholders Agreement in
           respect of Castle Transmission Services (Holdings) Ltd. and for the
           granting of certain options dated April 24, 1998
  ###10.25 Governance Agreement among Crown Castle International Corp.,
           TeleDiffusion de France International S.A. and Digital Future
           Investments B.V., dated as of August 21, 1998
 ****10.26 Supplemental Agreement to the Governance Agreement among Crown
           Castle International Corp., TeleDiffusion de France International
           S.A., Digital Future Investments B.V., dated May 17, 1999
  ###10.27 Form of Severance Agreement entered into between Crown Castle
           International Corp. and Ted Miller, George Reese, John Gwyn, Charles
           Green, Alan Rees, Blake Hawk and David Ivy
  ###10.28 Shareholders Agreement among Crown Castle International Corp.,
           TeleDiffusion de France International S.A. and Castle Transmission
           Services (Holdings) Limited dated August 1998
  ###10.29 Stockholders Agreement between Crown Castle International Corp. and
           certain stockholders listed on Schedule 1 thereto, dated as of
           August 21, 1998 as amended by Amendment No. 1, dated as of the 12th
           day of November, 1998
    +10.30 Amendment Number Three, dated as of August 11, 1999, to the
           Stockholders Agreement between Crown Castle International Corp. and
           certain stockholders listed on Schedule 1 thereto, dated as of
           August 21, 1998
    +10.31 Amendment Number Four, dated as of October 1, 1999, to the
           Stockholders Agreement between Crown Castle International Corp. and
           certain stockholders listed on Schedule 1 thereto, dated as of
           August 21, 1998
  ###10.32 Rights Agreement dated as of August 21, 1998, between Crown Castle
           International Corp. and ChaseMellon Shareholder Services L.L.C.
   **10.33 Amendment No. 1 to Rights Agreement dated March 31, 1999, between
           Crown Castle International Corp. and ChaseMellon Shareholder
           Services L.L.C.



                                      100
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
   No.                           Description of Exhibit
 ------- ----------------------------------------------------------------------
 <C>     <S>
 **10.34 Loan Agreement dated as of March 31, 1999 by and among Crown Atlantic
         HoldCo Sub LLC, as the Borrower, Key Corporate Capital Inc., as Agent,
         and the Financial Institutions listed therein
   10.35 Amendment to Loan Amendment Agreement, dated June 18, 1999, by and
         among Castle Transmission International Ltd., Castle Transmission
         Services (Holdings) Ltd., Millennium Communications Limited and the
         various banks and lenders listed as parties hereto.
   10.36 Credit Agreement dated as of March 15, 2000 among Crown Castle
         Operating Company, Crown Castle International Corp., The Chase
         Manhattan Bank, Credit Suisse First Boston Corporation, Key Corporate
         Capital Inc. and The Bank of Nova Scotia, as Agents, and the several
         Lenders which are parties thereto
   10.37 Amendment to Loan Amendment Agreement dated December 23, 1999 by and
         among Castle Transmission International, Ltd., Castle Transmission
         Services (Holdings) Ltd, Millennium Communications Limited and the
         various banks and lenders listed as parties thereto.
   11    Statement re: Computation of Per Share Earnings
   12    Computation of Ratios of Earnings to Fixed Charges and Earnings to
         Combined Fixed Charges and Preferred Stock Dividends
   21    Subsidiaries of Crown Castle International Corp.
   23    Consent of KPMG LLP
   27    Financial Data Schedule
</TABLE>
- --------
     # Incorporated by reference to the exhibits with the corresponding exhibit
       numbers in the Registration Statement on Form S-4 previously filed by
       the Registrant (Registration No. 333-43873).
    ## Incorporated by reference to the exhibits with the corresponding exhibit
       numbers in the Registration Statement on Form S-1 previously filed by
       the Registrant (Registration No. 333-57283).
     * Incorporated by reference to the exhibit previously filed by the
       Registrant on Form 8-K (Registration No. 0-24737) dated December 9,
       1998.
    ** Incorporated by reference to the exhibit previously filed by the
       Registrant on Form 8-K (Registration No. 0-24737) dated March 31, 1999.
    ### Incorporated by reference to the exhibits with the corresponding
        exhibit numbers in the Registration Statement on Form S-4 previously
        filed by the Registrant (Registration No. 333-71715).
   *** Incorporated by reference to the exhibit previously filed by the
       Registrant on Form 8-K (Registration No. 0-24737) dated June 9, 1999.
  **** Incorporated by reference to the exhibit previously filed by the
       Registrant on Form 8-K (Registration No. 0-24737) dated July 22, 1999.
     + Incorporated by reference to the exhibit previously filed by the
       Registrant on Form 10-Q (Registration No. 0-24737) dated September 30,
       1999.
  #### Incorporated by reference to the exhibits with the corresponding exhibit
       numbers in the Registration Statement on Form S-4 previously filed by
       the Registrant (Registration No. 333-87765).
 ***** Incorporated by reference to the exhibit previously filed by the
       Registrant on Form 8-K (Registration No. 0-24737) dated November 7,
       1999.
****** Incorporated by reference to the exhibit previously filed by the
       Registrant on Form 8-K (Registration No. 0-24737) dated November 19,
       1999.



                                      101
<PAGE>

                                   SIGNATURES


   Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, as amended, the Registrant has duly caused this Annual
Report on Form 10-K to be signed on its behalf by the undersigned, thereunto
duly authorized, on this 29th day of March, 2000.


                                      CROWN CASTLE INTERNATIONAL CORP.

                                    By:   /s/ Charles C. Green, III
                                       ----------------------------------
                                              Charles C. Green, III
                                           Executive Vice President and
                                              Chief Financial Officer

   Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, as amended, this Annual Report on Form 10-K has been
signed below by the following persons in the capacities indicated below on this
29th day of March, 2000.

<TABLE>
<CAPTION>
           Signature                                    Title
           ---------                                    -----
<S>                               <C>

   /s/ Ted B. Miller, Jr.                    Chief Executive Officer and
- -------------------------------                 Chairman of the Board
       Ted B. Miller, Jr.                   (Principal Executive Officer)


     /s/ David L. Ivy                         President and Director
- -------------------------------
         David L. Ivy


   /s/ Charles C. Green III                 Executive Vice President and
- -------------------------------                Chief Financial Officer
       Charles C. Green, III                (Principal Financial Officer)


   /s/ Wesley D. Cunningham                     Senior Vice President,
- -------------------------------    Chief Accounting Officer and Corporate Controller
       Wesley D. Cunningham                 (Principal Accounting Officer)


      /s/ Carl Ferenbach                             Director
- -------------------------------
          Carl Ferenbach


                                                     Director
- -------------------------------
          Michel Azibert


                                                     Director
- -------------------------------
          Bruno Chetaille


     /s/ J. Landis Martin                            Director
- -------------------------------
        J. Landis Martin
</TABLE>

                                      102

<PAGE>

           Signature                                    Title
           ---------                                    -----


      /s/ Randall A. Hack                            Director
- ---------------------------------
          Randall A. Hack


      /s/ Robert F. McKenzie                         Director
- ---------------------------------
          Robert F. McKenzie


      /s/ William A. Murphy                          Director
- ---------------------------------
          William A. Murphy


     /s/ Jeffrey H. Schutz                           Director
- ---------------------------------
         Jeffrey H. Schutz


     /s/ Edward C. Hutcheson, Jr.                    Director
- ---------------------------------
         Edward C. Hutcheson, Jr.


     /s/ William D. Strittmatter                     Director
- ---------------------------------
         William D. Strittmatter




                                      103

<PAGE>
                                                                     EXHIBIT 2.7

CONFIDENTIAL

                             AGREEMENT TO SUBLEASE


                                 by and among


                   BELLSOUTH PERSONAL COMMUNICATIONS, INC.,


                        BELLSOUTH CAROLINAS PCS, L.P.,


                       CROWN CASTLE INTERNATIONAL CORP.


                                      and


                            CROWN CASTLE SOUTH INC.




                                 AUGUST 1, 1999
<PAGE>

                               TABLE OF CONTENTS

ARTICLE 1 DEFINITIONS                                                         2
     1.1  Definitions                                                         2
     1.2  Other Capitalized Terms                                             8

ARTICLE 2 AGREEMENT DOCUMENTS                                                 8

ARTICLE 3 CONVEYANCE AND CONSIDERATION                                        9
     3.1  Conveyance                                                          9
     3.2  Consideration                                                       9
     3.3  Maintained Sites                                                    9
     3.4  Proration                                                          10
     3.5  Consents Under Ground Leases                                       11

ARTICLE 4 CLOSINGS                                                           12
     4.1  Closings                                                           12
     4.2  Transactions and Documents at the Closings                         12
     4.3  Costs of Closing                                                   13
     4.4  Further Assurances                                                 14
     4.5  Field Inspection                                                   15
     4.6  Deferral of Closings                                               15
     4.7  Re-Recordation                                                     16
     4.8  Title Searches                                                     16

ARTICLE 5 ADDITIONAL AGREEMENTS                                              16
     5.1  Expenses                                                           16
     5.2  Brokers                                                            17
     5.3  Risk of Loss and Insurance                                         17
     5.4  Condemnation                                                       17
     5.5  Publicity                                                          17
     5.6  TowerCo's Access and Inspection                                    18
     5.7  Cooperation                                                        18
     5.8  Governmental Filings                                               18
     5.9  Confidentiality                                                    19
     5.10 Real Estate Matters                                                20
     5.11 Update of Information                                              21
     5.12 CCIC's Guaranty                                                    21

ARTICLE 6 REPRESENTATIONS, WARRANTIES AND COVENANTS OF TRANSFERRING
ENTITIES                                                                     23
     6.1  Organization, Authority and Qualification                          23
     6.2  Capacity; Inconsistent Obligations                                 23
     6.3  Consents                                                           24
     6.4  No Violation; Compliance with Laws                                 24
     6.5  Litigation; Contingencies                                          24
     6.6  Leased and Owned Sites                                             24
<PAGE>

     6.7   Real Property                                                     24
     6.8   Eminent Domain                                                    25
     6.9   Taxes                                                             25
     6.10  Governmental Permits                                              25
     6.11  Environmental Matters                                             26
     6.12  Leases and Other Agreements                                       26
     6.13  No Undisclosed Liabilities                                        26
     6.14  Authorization                                                     26
     6.15  No Other Warranties                                               26

ARTICLE 7 REPRESENTATIONS, WARRANTIES AND COVENANTS OF TOWERCO               27
     7.1   Organization, Authority and Qualification                         27
     7.2   Ownership of Shares; Subsidiaries                                 27
     7.3   Capacity; Inconsistent Obligations                                28
     7.4   Consents                                                          28
     7.5   No Violation; Compliance with Laws                                28
     7.6   Liabilities                                                       28
     7.7   Litigation; Contingencies                                         29
     7.8   No Broker                                                         29
     7.9   No Other Warranties                                               29

ARTICLE 8 REPRESENTATIONS, WARRANTIES AND COVENANTS OF CCIC                  29
     8.1   Organization, Authority and Qualification                         29
     8.2   Capacity; Inconsistent Obligations                                29
     8.3   Consents                                                          29
     8.4   No Violation; Compliance with Laws                                30
     8.5   Litigation; Contingencies                                         30
     8.6   No Other Warranties                                               30

ARTICLE 9 CONDUCT OF BUSINESS PENDING CLOSINGS                               30
     9.1   Conduct of Business by the Transferring Entities                  30
     9.2   Conduct of Business by CCIC and TowerCo                           31

ARTICLE 10 CONDITIONS TO OBLIGATIONS OF TRANSFERRING ENTITIES                32
     10.1  Representations and Warranties                                    32
     10.2  Compliance with Agreements and Conditions                         32
     10.3  Closing Certificates                                              32
     10.4  Corporate Consents                                                32
     10.5  Consents and Approvals                                            32
     10.6  No Litigation                                                     33
     10.7  Fundamental Transactions                                          33
     10.8  Build-to-Suit Agreement                                           33
     10.9  Sublease                                                          33
     10.10 Site Maintenance Agreement                                        33
     10.11 Amendment to Site Marketing Agreement                             33

                                       2
<PAGE>

ARTICLE 11 CONDITIONS TO OBLIGATIONS OF CCIC AND TOWERCO                     34
     11.1  Representations and Warranties                                    34
     11.2  Compliance with Agreements and Conditions                         34
     11.3  Closing Certificates                                              34
     11.4  Corporate Consents                                                34
     11.5  Consents and Approvals                                            35
     11.6  No Litigation                                                     35
     11.7  Build-to-Suit Agreement                                           35
     11.8  Sublease                                                          35
     11.9  Site Maintenance Agreement                                        35
     11.10 Amendment to Site Marketing Agreement                             35

ARTICLE 12 INDEMNIFICATION                                                   36
     12.1  Indemnification by Transferring Entity                            36
     12.2  Indemnification by CCIC                                           36
     12.3  Indemnification by TowerCo                                        37
     12.4  Procedure for Claims                                              37
     12.5  Defense of Claims                                                 38
     12.6  Certain Limitations                                               39
     12.7  Limitation on Liability                                           39
     12.8  Survival                                                          39

ARTICLE 13 TERMINATION                                                       40
     13.1  Termination for Certain Causes by BSPCI                           40
     13.2  Termination for Passage of Time                                   41
     13.3  TowerCo's Remedies                                                41

ARTICLE 14 GENERAL PROVISIONS                                                42
     14.1  Notices                                                           42
     14.2  Facsimile as Writing                                              43
     14.3  Assignment; Binding Effect                                        43
     14.4  Headings                                                          43
     14.5  Exhibits and Schedules                                            44
     14.6  Defined Terms                                                     44
     14.7  Arbitration                                                       44
     14.8  Partial Invalidity and Severability                               45
     14.9  Waiver                                                            45
     14.10 Rights Cumulative                                                 45
     14.11 Time of Essence; Dates                                            45
     14.12 Governing Law                                                     46
     14.13 Counterparts                                                      46
     14.14 Attorneys' Fees                                                   46
     14.15 Authority                                                         46
     14.16 Counsel                                                           46
     14.17 Number and Gender                                                 46
     14.18 No Construction Against Preparer                                  46
     14.19 Entire Agreement; Modification                                    46
     14.20 Power of Attorney                                                 46

                                       3
<PAGE>

                             AGREEMENT TO SUBLEASE


     THIS AGREEMENT TO SUBLEASE, made and entered into this 1st day of August,
1999 (the "AGREEMENT"), by and among BELLSOUTH PERSONAL COMMUNICATIONS, INC., a
Delaware corporation ("BSPCI"), BELLSOUTH CAROLINAS PCS, L.P., a Delaware
limited partnership (the "CAROLINAS PARTNERSHIP" and collectively with BSPCI,
the "TRANSFERRING ENTITIES"), CROWN CASTLE INTERNATIONAL CORP., a Delaware
corporation ("CCIC"), and CROWN CASTLE SOUTH INC., a wholly owned subsidiary of
CCIC and a Delaware corporation ("TOWERCO"),

                              W I T N E S S E T H:

     WHEREAS, the Transferring Entities are engaged in the business of, among
other things, operating a wireless communications network in their licensed FCC
territories in the states of Georgia, North Carolina, South Carolina, eastern
Tennessee, eastern Georgia and portions of Virginia and Kentucky (collectively,
the "TERRITORY") which network is comprised of PCS communications cell site
locations as to which such Transferring Entities own fee simple title or a
leasehold interest, leasehold estate or other real property interest; and

     WHEREAS, CCIC, TowerCo and CCIC subsidiaries are engaged in the business
of, among other things, developing, constructing, managing, maintaining,
marketing, operating and leasing networks of communications tower facilities,
including the management of cellular communications sites and networks owned by
third party providers of wireless telecommunications services; and

     WHEREAS, in order to optimize the utilization and value of the cell site
locations and network within the Territory, the Transferring Entities desire to
enter into an agreement relating to:  (i) the design, construction and
installation by TowerCo on certain cell site locations radio tower structures
and other improvements pursuant to the terms and conditions of the Agreement to
Build to Suit of even date herewith (the "BUILD-TO-SUIT AGREEMENT"), among
BSPCI, CCIC and TowerCo; (ii) lease or sublease of certain cell site locations,
including locations which are subject to the Build-to-Suit Agreement, by BSPCI
and TowerCo pursuant to the terms and conditions of the Sublease of even date
herewith (the "SUBLEASE"), among BSPCI, CCIC and TowerCo; (iii) marketing,
maintenance and operation of certain cell site locations by TowerCo for the
benefit of BSPCI and its Affiliates and other providers of wireless
telecommunications services pursuant to the terms and conditions of the Site
Maintenance Agreement (as defined in SECTION 1.1); and (iv) various other
agreements with respect to the respective rights, duties and obligations of the
parties relating to the subject matter hereof, all as more particularly
described in and subject to the terms and conditions of this Agreement;
<PAGE>

     NOW, THEREFORE, for and in consideration of the premises, and for other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

                                   ARTICLE 1
                                  DEFINITIONS

     1.1 DEFINITIONS. For purposes of this Agreement, the following capitalized
terms have the following respective meanings:

     "ACTION" means any action, suit, litigation, complaint, counterclaim,
claim, petition, mediation contest, or administrative proceeding, whether at
law, in equity, in arbitration or otherwise, and whether conducted by or before
any Government or other Person.

     "AFFILIATE" of a Party means any individual or firm, corporation,
partnership, limited liability company, association, trust or other entity
which, whether directly or indirectly, Controls, is Controlled by, or is under
common Control with the subject party.

     "AGREEMENT" means this Agreement and the Exhibits and Schedules hereto, as
any of the foregoing may, from time to time, be amended, modified or restated in
accordance with the provisions hereof.

     "AMENDMENT TO SITE MARKETING AGREEMENT" means Sixth (6th) Amendment to Site
Marketing Agreement of even date herewith between Crown Communication Inc. and
BSPCI.

     "APPLICABLE TRANSFERRING ENTITIES" has the meaning given to such term in
SECTION 11.1.

     "BUILD-TO-SUIT AGREEMENT" has the meaning given to such term in Preamble.

     "BSPCI AFFILIATE" has the meaning given to such term in the Sublease.

     "BSPCI INDEMNIFIED LOSSES" has the meaning given to such term in SECTION
12.2(a).

     "BSPCI INDEMNITEE" means BSPCI, its Affiliates, and the respective
directors, officers, employees, contractors, subcontractors, advisors and
consultants of BSPCI or any BSPCI Affiliate.

     "BTS SITES" has the meaning given to such term in the Build-to-Suit
Agreement.

     "CAROLINAS PARTNERSHIP" has the meaning given to such term in the Preamble.

     "CCIC INDENTURE" means the Indenture dated as of November 25, 1997 between
CCIC and United States Trust Company of New York, as Trustee, and any
modification, amendment or supplement thereto or replacement thereof.

                                       2
<PAGE>

     "CLOSING(S)" has the meaning given to such term in SECTION 4.1(a).

     "CLOSING DATE(S)" has the meaning given to such term in SECTION 4.1(a).

     "CLOSING SCHEDULE" has the meaning given to such term in SECTION 4.1(a).

     "COLOCATION AGREEMENTS" has the meaning given to such term in the Sublease.

     "CONFIDENTIAL INFORMATION" has the meaning given to such term in SECTION
5.9(b).

     "Consideration" has the meaning given to such term in SECTION 3.2(a).

     "CONTROL" means the ownership, directly or indirectly, of sufficient voting
shares of an entity, or otherwise the possession, directly or indirectly, of the
power to direct or cause the direction of the management and policies of an
entity, whether through the ownership of voting securities, by contract or
otherwise.

     "DEDUCTIBLE AMOUNT" has the meaning given to such term in SECTION 12.6(b).

     "DISCLOSEE" has the meaning given to such term in SECTION 5.11(a).

     "DISCLOSING PARTY" has the meaning given to such term in SECTION 5.11(a).

     "DISCLOSURE SCHEDULE" has the meaning given to such term in SECTION 4.6(b).

     "ENVIRONMENTAL LAWS" means all Laws and Orders in effect at the time of the
applicable Closing, relating to the Hazardous Materials and/or protection of the
environment from pollution or contamination.

     "ENVIRONMENTAL CONDITIONS" means, as to each Site, any conditions or
circumstances, including without limitation, the presence of Hazardous
Materials, that (i) require abatement or correction under the Environmental
Laws, (ii) give rise to any civil or criminal Liability under any Environmental
Law relating to the use or occupancy of any Site or (iii) constitute a public or
private nuisance.

     "EXCLUDED SITES" means any Site excluded from the Sublease pursuant to the
terms of this Agreement.

     "EXISTING BUILD-TO-SUIT AGREEMENTS" has the meaning given to such term in
the Build-to-Suit Agreement.

     "EXISTING LEASES" means Existing Subleases under the Sublease.

                                       3
<PAGE>

     "EXISTING SITES" means the Sites, the Towers and Improvements on which have
been constructed and used by the Transferring Entities prior to the date hereof,
as such Sites and Transferring Entities are listed in ANNEX A attached hereto,
as may be amended from time to time.

     "FAA" means the Federal Aviation Administration.

     "FCC" means the Federal Communications Commission.

     "FINAL CLOSING" has the meaning given to such term in SECTION 4.1(b).

     "FINAL CLOSING DATE" has the meaning given to such term in SECTION 4.1(b).

     "FORUM" means any federal, national, state, local, municipal or foreign
court, governmental agency, administrative body or agency, tribunal, private
alternative dispute resolution system, or arbitration panel.

     "GAAP" means generally accepted accounting principles, consistently
applied.

     "GOVERNMENT" means any federal, state, territorial, county, municipal,
local or other government or governmental agency or body or any other type of
regulatory body, whether domestic or foreign, including without limitation the
FCC and the FAA.

     "GOVERNMENTAL PERMITS" means any and all governmental approvals, permits,
licenses, registrations, certificates of occupancy, approvals and other
governmental authorizations.

     "GROUND LEASE" has the meaning given to such term in the Sublease.

     "GROUND LESSOR"  has the meaning given to such term in the Sublease.

     "GROUND LESSOR CONSENT" has the meaning given to such term in SECTION
3.5(a).

     "GROUND LESSOR CONSENT SITE" means any Site requiring a Ground Lessor
Consent.

     "GROUND RENT" has the meaning given to such term in the Sublease.

     "HAZARDOUS MATERIALS" means and includes petroleum products, flammable
explosives, radioactive materials, asbestos or any material containing asbestos,
polychlorinated biphenyls, or any hazardous, toxic or dangerous waste, substance
or material defined as such or defined as a hazardous substance or any similar
term, by, in or for the purposes of the Environmental Laws, including, without
limitation Section 101(14) of the Comprehensive Environmental Response,
Compensation and Liability Act of 1980.  The term Hazardous Materials  excludes
quantities of

                                       4
<PAGE>

materials or substances maintained by the applicable Transferring Entity on or
about any of its Sites (including Tower and Improvements thereon) in the
ordinary course of business, so long as such materials are maintained in
accordance with the applicable Environmental Laws.

     "HSR ACT" has the meaning given to such term in SECTION 5.10(a).

     "IMPROVEMENTS" has the meaning given to such term in the Sublease.

     "INCLUDED SITES" means any Existing Sites and BTS Sites that become subject
to the Sublease.

     "INDEMNIFIED LOSSES" means collectively, BSPCI Indemnified Losses and
TowerCo Indemnified Losses.

     "INDEMNIFIED PARTY" has the meaning given to such term in SECTION 12.4.

     "INDEMNIFYING PARTY" has the meaning given to such term in SECTION 12.4.

     "INITIAL CLOSING" has the meaning given to such term in SECTION 4.1(b).

     "INITIAL CLOSING DATE" has the meaning given to such term in SECTION
4.1(b).

     "KNOWN," "TO THE BEST KNOWLEDGE OF," or words of similar import means, as
to each party hereto, the actual knowledge of any person who is part of the
management of such party (and any person succeeding to any such position prior
to the Final Closing but only to the extent they acquire actual knowledge).

     "LAND" has the meaning given to such term in the Sublease.

     "LAWS" means all federal, state, county, municipal and other governmental
constitutions, statutes, ordinances, codes, regulations, resolutions, rules,
requirements and directives and all decisions, judgments, writs, injunctions,
orders, decrees or demands of courts, administrative bodies and other
authorities construing any of the foregoing.

     "LEASED SITE" means any Site that is leased, subleased or licensed to
TowerCo pursuant to the Sublease.

     "LIABILITY" means any liability or obligation whether asserted or
unasserted, absolute or contingent, accrued or unaccrued, liquidated or
unliquidated and whether due or to become due.

     "LIENS" means an interest or a claim by a Person other than a Transferring
Entity or its Affiliates, whether such interest or claim is based on the common
law, statute, or contract, including, without limitation, liens, charges,
claims, security interests, pledges, Mortgages,

                                       5
<PAGE>

leases, licenses, conditional agreements, title retention agreements,
preference, priority or other security agreements or preferential arrangements
of any kind, reservations, exceptions, encroachments, easements, rights-of-way,
covenants, conditions, restrictions and other title exceptions and encumbrances
affecting all or any part of Land, the Tower and Improvements thereon.

     "MAINTAINED SITES" means Sites which become subject to the Site Maintenance
Agreement contemporaneously with the execution of the Site Maintenance Agreement
or at any time thereafter in accordance with the Site Maintenance Agreement, and
shall include Revenue Sharing Sites and Ground Lessor Consent Sites.

     "MATERIAL ADVERSE EFFECT" means as to any Site, a material adverse effect
on any Transferred Interest granted by the Transferring Entity in respect of
such Site.

     "MAXIMUM INDEMNIFICATION" has the meaning given to such term in SECTION
12.6(c).

     "MORTGAGES" means any recorded mortgage, deed to secure debt, deed of
trust, trust deed or other conveyance of, or encumbrance against the Sites or
the Transferred Interests as security for any debt.

     "OBLIGATIONS" has the meaning given to such term in SECTION 5.15(a).

     "ORDERS" means all applicable orders, writs, judgments, decrees, rulings,
consent agreements, and awards of or by any Forum or entered by consent of the
party to be bound.

     "OWNED SITE"  means any Site that is owned by BSPCI or the Carolinas
Partnership.

     "PERSON" means an individual, partnership, joint venture, limited liability
company, association, corporation, trust or any other legal entity.

     "PERMITTED LIENS" means:  (i) statutory liens for current real or personal
property taxes not yet due and payable; (ii) worker's, carrier's and
materialman's liens incurred in the ordinary course of business related to
obligations not yet due and payable; (iii) easements, rights of way or similar
grants of rights to a third party for access to or across any Site, including,
without limitation, rights of way or similar rights granted to any utility or
similar entity in connection with the provision of electric, telephone or
similar services; (iv) Colocation Agreements; (v) Existing Leases; (vi) liens
that are immaterial in character, amount or extent, or that do not materially
detract from the value and interfere in any material respect with the Permitted
Use of any Site; (vii) restrictions and conditions due to zoning laws and
regulations; and (viii) reservations, restrictions, limitations, conditions and
other liens of public record.

     "PERMITTED USE" has the meaning given to such term in the Sublease.

                                       6
<PAGE>

     "PREPAID EXPENSES" means any and all prepaid items, unbilled costs and
fees, and rents, revenues, payments, accounts, notes and other receivables under
any service contracts, Existing Leases, Colocation Agreements as of the
applicable Closing Date.

     "QUALIFYING INTEREST" means any possessory interest in real property held
by a Transferring Entity that is capable of being transferred to TowerCo as a
Transferred Interest consistent with the terms of the Sublease in all material
respects.

     "REAL ESTATE REPRESENTATION" means (i) any real estate representation or
warranty made by any Transferring Entity in SECTIONS 6.1 through 6.5, or (ii) a
representation or warranty made by any Transferring Entity in any of SECTIONS
6.6, 6.7, 6.8, 6.9, 6.10, 6.11, 6.12 or 6.13.

     "RESERVED SPACE" has the meaning given to such term in the Sublease.

     "RETURNS" has the meaning given to such term in SECTION 6.9.

     "REVENUE SHARING SITES" means any Site whose Ground Lease provides that the
ground lessee thereunder is required to share with the Ground Lessor a
percentage of revenues from the subleasing of the Site.

     "SITE MAINTENANCE AGREEMENT" means the Site Maintenance Agreement to be
entered into by and among Crown Network Systems, Inc. and the Transferring
Entities.

     "SITES" means all cell tower sites that are owned or leased by the
Transferring Entities located within the Territory that are now or hereafter
subject to the Transaction Documents, excluding without limitation any Sites
that are the subject of the Existing Build to Suit Agreements.  Sites shall
include Existing Sites, BTS Sites, Excluded Sites and Maintained Sites.  The
term "Sites" excludes (i) any and all cell tower sites that are the subject of
the Agreement to Sublease dated as of June 1, 1999 among BellSouth Mobility Inc,
BellSouth Telecommunications, Inc., CCIC and TowerCo, (ii) any Sites excluded
from this transaction by the rural telephone companies which are limited
partners in the Carolinas Partnership, and (iii) any Sites funded by such rural
telephone companies under a Coverage Extension Agreement.

     "SUBLEASE" has the meaning given to such term in the Preamble.

     "SUBLEASED PROPERTY" has the meaning given to such term in the Sublease.

     "SURVIVAL PERIOD" has the meaning given to such term in SECTION 12.8.

     "TAXES" means all taxes, duties, charges, fees, levies or other assessments
imposed by any taxing authority, whether domestic or foreign, including, without
limitation, income (net, gross or other including recapture of any tax items
such as investment tax credits), alternative or add-on minimum tax, capital
gains, gross receipts, value-added, excise, withholding, personal

                                       7
<PAGE>

property, real estate, sale, use, ad valorem, license, lease, service,
severance, stamp, transfer, payroll, employment, customs, duties, alternative,
estimated and franchisee taxes (including any interest, levies, charges,
penalties or additions attributable to or imposed on or with respect to any such
assessment).

     "TERMINATION FEE" has the meaning given to such term in SECTION 13.1(b).

     "TERRITORY" has the meaning given to such term in the Preamble.

     "TOWER" has the meaning given to such term in the Sublease.

     "TOWERCO INDEMNIFIED LOSSES" has the meaning set forth in SECTION 12.1(a).

     "TOWERCO INDEMNITEES" means TowerCo, its Affiliates, and the respective
directors, officers, employees, agents, subcontractors, advisors and consultants
of TowerCo or its Affiliates (except BSPCI, any BSPCI Affiliate and any
contractors, subcontractors, advisors and consultants of BSPCI).

     "TOWERCO SHARES" has the meaning given to such term in SECTION 7.2(a).

     "TRANSFERRING ENTITIES" has the meaning given to such term in the Preamble.

     "TRANSFERRED INTERESTS" has the meaning given to such term in SECTION
3.1(a).

     "TRANSACTION DOCUMENTS" means collectively this Agreement, the Sublease,
the Build-to-Suit Agreement, the Site Maintenance Agreement and each of the
other documents and agreements listed in ARTICLES 4, 10 and 11.

     1.2 OTHER CAPITALIZED TERMS.  Any other capitalized terms used in this
Agreement shall have the respective meanings given to them elsewhere in this
Agreement.

                                   ARTICLE 2
                              AGREEMENT DOCUMENTS

     This Agreement shall consist of the following documents, as amended from
time to time as provided herein:


     (A)  this Agreement document;

     (B)  the following Exhibits:

          Exhibit A    Assignment And Assumption Agreement
          Exhibit B    Proration

                                       8
<PAGE>

          (C) such additional documents as are incorporated by reference,
     including without limitation the Schedules attached hereto and each
     Disclosure Schedule provided by the Transferring Entities.

If any of the foregoing are inconsistent, this Agreement shall prevail over
Exhibits and additional incorporated documents.

                                   ARTICLE 3
                          CONVEYANCE AND CONSIDERATION

     3.1 CONVEYANCE.  (a)  Subject to the terms and conditions of this
Agreement, each Transferring Entity agrees to grant, convey and deliver to
TowerCo, and TowerCo agrees to take and accept from such Transferring Entity, at
the Closings, a leasehold, subleasehold interest, or other interest consistent
with the terms of the Sublease, as applicable, in and to the Subleased Property
of all of the Existing Sites and BTS Sites which the applicable Transferring
Entity is not legally precluded from leasing or subleasing to TowerCo, as more
particularly described in the Sublease and applicable Site Designation
Supplements (collectively, the "TRANSFERRED INTERESTS").

     (b) Notwithstanding anything to the contrary contained in SECTION 3.1(a),
the Transferred Interests shall not include, without limitation, any of the
following:  (i) the Reserved Space of the Included Sites; (ii) BSPCI's or its
Affiliate's Improvements on the Included Sites; (iii) any equipment or
transmissions systems used for the remote monitoring of the Included Sites; (iv)
any and all rights that accrue or will accrue to any Transferring Entity under
the Transaction Documents, including, without limitation, the Consideration; (v)
any and all rights retained by and/or granted to any Transferring Entity
pursuant to the Transaction Documents; and (vi) the Excluded Sites.

     3.2 CONSIDERATION. (a) Subject to the prorations and adjustments set forth
in this ARTICLE 3, the aggregate consideration for the Transferred Interests
(the "CONSIDERATION"), based on 773 Existing Sites, shall be equal to
$316,930,000 in cash.

     (b) At each Closing, TowerCo shall pay the applicable Transferring Entity
(A) $410,000 in Cash multiplied by (B) the number of the Included Sites being
conveyed at such Closing.

     (c) Each payment under SECTION 3.2 shall be made by wire transfer of
immediately available funds through the Federal Reserve System to an account
designated in writing by BSPCI.

     3.3 MAINTAINED SITES. Subject to the right of a Transferring Entity to
defer the Closing of a Site until a later Closing under SECTION 4.6, if at any
Closing a Transferring Entity is unable to

                                       9
<PAGE>

deliver to TowerCo the Transferred Interest with respect to any Site as a result
of such Transferring Entity's failure to satisfy any condition set forth in
SECTION 11.5, TowerCo does not waive that condition, and such Site does not
become a leased or a subleased Site pursuant to the Sublease on or prior to the
Final Closing, then for purposes of this Agreement, such Site shall at the
Transferring Entity's option, to be exercised by such Transferring Entity's
written notice to TowerCo on or prior to the applicable Closing, either (i)
become an Excluded Site or (ii) become subject to the Site Maintenance Agreement
in which case such Site shall become a Maintained Site under the Site
Maintenance Agreement pursuant to the execution by the applicable Transferring
Entity and TowerCo of one or more Addenda to the Site Maintenance Agreement;
provided, however, that, if as of the applicable Closing the only unsatisfied
and unwaived condition is the absence of any required consent of the Ground
Lessor, such Site shall be deferred until such a consent is received; provided,
further, that, if as of the Final Closing the parties have not obtained such
consent, such Site shall be a Maintained Site or an Excluded Site, at the
Transferring Entity's option as provided herein. For purposes of determining the
Consideration pursuant to SECTION 3.2, Sites that become Maintained Sites
pursuant to this SECTION 3.3 or Excluded Sites pursuant to SECTION 4.6, 5.3 OR
5.4 shall not constitute an Included Site.

     3.4 PRORATION. (a)  At each Closing, the following items shall be
apportioned between the Transferring Entity and TowerCo:  (i) federal, state,
local or foreign Taxes (other than income taxes) payable with respect to the
Transferred Interests of Included Sites; and (ii) the other items set forth in
EXHIBIT B attached hereto.  Such apportionments shall be made pro rata on a per
diem basis as of each Closing Date so that all such Taxes and other payments
attributable to the period prior to such Closing Date shall be for the account
of the Transferring Entity, and all such Taxes and other payments attributable
to the period from and after such Closing Date shall be for the account of
TowerCo.  Notwithstanding anything to the contrary in this Agreement, all up-
front, bolt-on or attachment fees or payments and escrow amounts related to
Existing Leases paid prior to the applicable Closing shall remain with the
applicable Transferring Entity.

     (b) In the event that the amount of any item to be prorated is not
determinable at the time of each Closing, such proration shall be made on the
basis of the best available information, and the applicable Transferring Entity
and TowerCo shall re-prorate such item promptly upon receipt of the applicable
bills therefor and shall make between themselves any equitable adjustment
required by reason of any difference between the estimated amount used as a
basis for the proration at each Closing and the actual amount subject to
proration.  In the event any prorated item is due and payable at the time of a
Closing, the same shall be paid at such Closing.  If any prorated item is not
paid at a Closing, and either party has identified that item at Closing as a
properly prorated item, the applicable Transferring Entity shall deliver to
TowerCo the bills therefor promptly upon receipt thereof and TowerCo shall be
responsible for the payment of TowerCo's pro rata share in full thereof within
the time fixed for payment thereof and before the same becomes delinquent,
provided that TowerCo's obligation to make such payment before it has become
delinquent is subject to TowerCo's having received the bill therefor in a
sufficiently timely manner.  In no event shall TowerCo be responsible for any

                                       10
<PAGE>

prorated item about which TowerCo receives notice more than eighteen (18) months
following the applicable Closing.

     3.5 CONSENTS UNDER GROUND LEASES.

     (a) Notwithstanding anything to the contrary in this Agreement, if the
Ground Lessor with respect to any particular Site refuses to give its consent to
BSPCI's subleasing of such Site to TowerCo and TowerCo's subsequent subleasing
of portions of such Site to third parties (each, a "GROUND LESSOR CONSENT"), all
pursuant to the Sublease, then BSPCI may, in its sole discretion, offer to such
Ground Lessor, as an inducement to give such consent, an increase in the Ground
Rent.  If the proposed increase of the Ground Rent as to any Site is equal to or
less than 25% of the then current Ground Rent (which then current Ground Rent is
based on all then recurring monthly payments, it being understood that after the
Ground Rent is increased, all future adjustments in the nature of annual or
other recurring increases and/or existing revenue sharing arrangements shall
apply to such increased Ground Rent) and such offer is accepted by the
applicable Ground Lessor, then BSPCI shall give CCIC written notice of such
increase promptly thereafter and CCIC shall accept such Site and such Site shall
become subject to the Sublease.  If the applicable Ground Lessor will agree to
grant its consent to BSPCI's sublease of the Site to TowerCo and TowerCo's
subsequent sublease of portions of the Site to third parties only if BSPCI is
willing to increase the Ground Rent under the applicable Ground Lease by more
than twenty-five percent (25%) of the then current Ground Rent (which then
current Ground Rent is based on all then recurring monthly payments, it being
understood that after the Ground Rent is increased, all future adjustments in
the nature of annual or other recurring increases and/or existing revenue
sharing arrangements shall apply to such increased Ground Rent), then TowerCo
will have (i) the right to participate in any subsequent discussions with the
applicable Ground Lessor regarding the obtaining of its consent and (ii) an
option, exercisable within ten (10) days of receipt of notice from BSPCI to
cause such Site not to become subject to the Sublease, in which event such Site
shall constitute a Maintained Site.

     (b) If the parties are unable to obtain any Ground Lessor Consent by the
applicable Closing, the parties shall continue using commercially reasonable
efforts to obtain such Ground Lessor Consent in accordance with SECTION 3.5(a);
provided, that if the parties subsequently obtain such Ground Lessor Consent as
to any Site, the Closing for such Site shall take place at the Closing next
succeeding the date on which such Ground Lessor Consent is obtained, or, if the
Final Closing has occurred, within six (6) months after the Final Closing at a
time agreed by the parties; provided further, no Closings for such Sites shall
occur after the expiration of such six (6) month period, unless the parties
otherwise agree.

     (c) In pursuing any Ground Lessor Consent for any Site pursuant to SECTION
3.5(a), BSPCI may not offer to the Ground Lessor any right to share in revenues
received by TowerCo from such Site unless the maximum amount of shared revenues
would not exceed twenty-five percent (25%) of the then-current base Ground Rent
for such Site.

                                       11
<PAGE>

                                   ARTICLE 4
                                   CLOSINGS

     4.1 CLOSINGS. (a) Subject to prior termination of this Agreement by BSPCI
pursuant to ARTICLE 14, the consummation of the transfer and conveyance of the
Transferred Interests and other transactions contemplated by this Agreement
shall occur in multiple closings (individually, a "CLOSING", and collectively,
the "CLOSINGS"), and each such Closing shall take place at the offices of
Kilpatrick Stockton LLP, Suite 2800, 1100 Peachtree Street, Atlanta, Georgia
30309-4530, at such times and on such dates (each, the "CLOSING DATE"), as
specified in the closing schedule set forth in SCHEDULE 4.1 attached hereto, as
modified pursuant to the terms hereof (the "CLOSING SCHEDULE").

     (b) Notwithstanding anything to the contrary contained herein, the parties
acknowledge and agree that each Closing shall be subject to the provisions of
ARTICLES 10 and 11 of this Agreement and shall take place after all the
conditions set forth in such ARTICLES 10 and 11 have been satisfied or waived.
The parties further acknowledge that the initial Closing (the "INITIAL CLOSING")
shall be effective August 1, 1999, with funding to occur on such date as the
parties agree (the "INITIAL CLOSING DATE"), and thereafter each Closing shall
take place as provided in the Closing Schedule; provided, however, that in no
event shall the final Closing (the "FINAL CLOSING") occur later than on December
31, 1999 (the "FINAL CLOSING DATE").

     (c) The parties shall use commercially reasonable efforts to include in the
Initial Closing at least two hundred fifty (250) Sites, whether as an Included
Site, Excluded Site or Maintained Site, including, without limitation, any Sites
deferred pursuant to SECTION 3.3 or 4.6 from the previous Closings.

     4.2 TRANSACTIONS AND DOCUMENTS AT THE CLOSINGS. (a) At each Closing:

          (i) TowerCo shall pay the applicable Consideration in respect of all
     of the Transferred Interests being conveyed at such Closing;

          (ii) Each of CCIC and TowerCo shall execute and deliver to the
     applicable Transferring Entity any and all documents and instruments
     relating to the acceptance of the Transferred Interest of each of its
     Included Sites, including, without limitation, (A) Site Designation
     Supplements with respect to Transferred Interests of the Included Sites
     being conveyed at such Closing, (B) an assignment and assumption agreement
     in substantially the form attached hereto as EXHIBIT A (each, an
     "ASSIGNMENT AND ASSUMPTION AGREEMENT") relating to the assignment of the
     Existing Leases affecting the Included Sites subject to such Closing; (C)
     if required, an Addendum to the Site Maintenance Agreement reflecting any
     additions of Sites to the Maintained Sites pursuant to SECTION 3.3 and any
     additional Transferring Entities; and (E) such other documents,
     certificates, agreements and other papers as set forth in ARTICLE 10 or may
     be necessary or convenient to

                                       12
<PAGE>

     effectuate the consummation of the transactions contemplated by this
     Agreement and other Transaction Documents, and its purposes and intent.

                (iii) Each Transferring Entity shall execute and deliver to
     TowerCo any and all documents and instruments relating to the transfer of
     the Transferred Interest of each Included Site, including, without
     limitation, (A) all consents, authorizations and approvals in respect of
     the Included Sites that are necessary for the consummation of each Closing,
     including any and all required consents of Ground Lessors and Governmental
     Permits; (B) the Assignment and Assumption Agreement relating to assignment
     of the Existing Leases affecting the Included Sites subject to such
     Closing; (C) Site Designation Supplements with respect to the Transferred
     Interests of Included Sites being conveyed at such Closing; (D) if
     required, one or more Addenda to the Site Maintenance Agreement reflecting
     any additions of Sites to the Maintained Sites pursuant to SECTION 3.3; (E)
     a receipt for the Consideration delivered to it at such Closing; and (F)
     such other documents, certificates, agreements and other papers as set
     forth in ARTICLE 11 or may be necessary or convenient to effectuate the
     consummation of the transactions contemplated by this Agreement and other
     Transaction Documents, and its purposes and intent.

        (b) In addition to and not in limitation of SECTION 4.2(a):

                (i) At the Initial Closing, TowerCo, CCIC and BSPCI (for itself
     and on behalf of the Carolinas Partnership) shall execute and deliver the
     Sublease;

                (ii) At the Initial Closing, TowerCo, CCIC and BSPCI (for itself
     and on behalf of the Carolinas Partnership) shall execute and deliver the
     Build-to-Suit Agreement; and

                (iii) On or prior to the Initial Closing, TowerCo, BSPCI (for
     itself and on behalf of the Carolinas Partnership) shall execute and
     deliver the Site Maintenance Agreement.

     4.3 COSTS OF CLOSING. Except as otherwise provided in the Transaction
Documents, the applicable Transferring Entity shall be responsible for and pay
any and all transfer taxes and routine closing costs and expenses, including,
without limitation, (i) any transfer Tax payable on the transfer, if any, and
(ii) all recording costs relating to any title clearance matters, if any, it
being understood and agreed that such recording costs shall not include
recording costs for which CCIC is responsible under SECTION 5.12(c).
Notwithstanding anything to the contrary contained herein, (i) any fees, costs
and expenses incurred by or on behalf of TowerCo for the services ordered or
requested by TowerCo for which such Transferring Entity is not liable under the
Transaction Documents shall be the responsibility of and shall be paid for by
TowerCo and (ii) any fees, costs and expenses incurred by or on behalf of any
Transferring Entity for services ordered or requested

                                       13
<PAGE>

by such Transferring Entity for which such Transferring Entity is expressly
liable under the Transaction Documents shall be the responsibility of and shall
be paid for by such Transferring Entity.

     4.4 FURTHER ASSURANCES; CORRECTIONS. (a) At each Closing, and from time to
time thereafter, each Transferring Entity shall do all such additional and
further acts, and shall execute and deliver all such additional and further
instruments, certificates and documents, as TowerCo may reasonably require fully
to vest in and assure to TowerCo full right, title and interest in and to the
Transferred Interests to the full extent contemplated by this Agreement and
otherwise to effectuate the consummation of the transactions contemplated by
this Agreement. Each of the parties hereto will cooperate with the others and
execute and deliver to the other parties such other instruments and documents
and take such other actions as may be reasonably requested from time to time by
any other party as necessary to carry out, evidence and confirm the intended
purposes of this Agreement.

     (b) If in the review of any Site Designation Supplement either party
identifies any corrections that in either party's judgment necessitate further
revisions to EXHIBIT B, C or D to such Site Designation Supplement, the parties
may at either party's request effect the correction by SE Technologies of such
EXHIBIT B, C or D, and defer the recordation of such Site Designation Supplement
until such revisions are made, for up to thirty (30) days.

     (c) In addition, with respect to the Included Sites, the parties shall have
the right to review and make corrections, if necessary, to any and all exhibits
to the Site Designation Supplements applicable to such Included Sites after the
applicable Closing.  After making any such corrections, TowerCo shall re-record
any such Site Designation Supplements to reflect such corrections, if requested
by the applicable Transferring Entity.

     (d) If after any Closing any party discovers that the name of the
Transferring Entity as set forth in any Site Designation Supplement is
incorrect, the applicable Transferring Entity shall re-execute such Site
Designation Supplement in such a manner as to correct such name, and TowerCo
shall re-record such Site Designation Supplement, unless the parties agree that
such re-recordation is not necessary.  The foregoing obligation shall survive
the Closing in respect of which such Site Designation Supplement was executed
for a period of six (6) months.

     (e) The Transferring Entity shall have the right, at its sole expense, to
cause any amendment to the Site Designation Supplement to be recorded. In
addition, the parties shall cooperate with each other to cause changes to be
made in the documentation for any Site, and in the Site Designation Supplement
for such Site, if such changes are requested by the Transferring Entity to
evidence any permitted changes in the Reserved Space or Transferred Interest
respecting such Site, including without limitation changes in such Transferring
Entity's antennas or other parts of its Communications Facility at such Site.
Such obligation shall survive any Closing without limitation.

                                       14
<PAGE>

     4.5 FIELD INSPECTION. After the applicable Closing Date, CCIC shall, or
may cause its agent to, collect data relating to the Existing Sites, sufficient
to confirm that such Existing Sites have been adequately described and EXHIBITS
B, C and D for all Site Designation Supplements relating to such Existing Sites
have been properly prepared.  CCIC shall pay all the fees and expenses of any
such agent.  BSPCI shall cooperate with CCIC to coordinate any such field
inspection.  CCIC shall notify BSPCI of the results of any such field
inspection, promptly after receiving the results thereof.  The Transferring
Entities may also collect similar data relating to the Existing Sites.  CCIC
shall, or shall cause such agent to, make such changes in its documentation as
may be requested by the applicable Transferring Entity to effect any correction,
whether before or after the applicable Closing.  Such obligation shall survive
the applicable Closing until six (6) months after the Final Closing.  The
parties agree that, as between the parties, the description of Existing Sites
shall be sufficient to adequately describe the Transferred Interests, and agree
to effect changes and corrections requested by a party consistent with that
objective.  In addition, where any discrepancy in EXHIBITS B, C or D requires
verification in the field, including without limitation verification as to the
number of antennas, height of antennas, location of antennas or location of
antenna mounting hardware, the parties shall provide adequate resources and
personnel to resolve such discrepancy within thirty (30) days after the
applicable Closing.

     4.6 DEFERRAL OF CLOSINGS; UPDATING OF REPRESENTATIONS. (a) Each
Transferring Entity will have the right to defer the Closing as to any Site to a
later Closing by virtue of (i) the failure of such Site to satisfy any condition
to the obligations of CCIC or TowerCo respecting such Site (including without
limitation the failure to obtain any Ground Lessor Consent, as contemplated by
SECTION 3.5) or (ii) the breach by the applicable Transferring Entity of any
Real Estate Representation as to such Site. If, by the Final Closing, the
applicable Transferring Entity fails, after the exercise of reasonable efforts,
to cause any such unsatisfied (and unwaived) condition to be satisfied or to
cure any such (unwaived) breach of a Real Estate Representation, such Site shall
constitute an Excluded Site or Maintained Site pursuant to and as provided in
SECTION 3.3. CCIC shall notify BSPCI prior to the applicable Closing of any Site
that it believes does not satisfy any condition in this Agreement to its
obligations to acquire the Transferred Interest in such Site, including without
limitation by virtue of a breach of a Real Estate Representation as to such
Site. The applicable Transferring Entity will have the right to cure any such
breach of a representation, warranty or covenant and/or remedy such condition,
and defer the Closing of such Site to facilitate such cure, as provided above.

        (b) As soon as reasonably practicable prior to the date scheduled for
any Closing in the Closing Schedule, the applicable Transferring Entity shall
disclose in writing any material information, known to such Transferring Entity
without additional inquiry, that is required to (x) be provided pursuant to any
representation or warranty made by a Transferring Entity pursuant to ARTICLE 6
or (y) cause any Real Estate Representation with respect to any Existing Site to
be true and correct in all material respects and would modify, amend or
supplement such Real Estate Representation, including without limitation: (i) to
set forth exceptions to any such representations and warranties, where such
exceptions were not theretofore set forth in this Agreement or any Schedule
hereto, or (ii) to reflect any lease,

                                       15
<PAGE>

sublease or license that becomes an Existing Lease entered into after the date
of this Agreement in the ordinary course of business consistent with past
practices and matters related thereto. The applicable Transferring Entity shall
provide any such disclosure that relates to such Transferring Entity and does
not constitute a Real Estate Representation prior to the first Closing in which
any Sites of such Transferring Entity is included. Any such disclosure shall be
deemed to create and constitute a portion of, and all such disclosures together
shall be, the "DISCLOSURE SCHEDULE". Any Existing Site in respect of which the
applicable Transferring Entity makes any disclosure pursuant to this SECTION
4.6(b) may, at CCIC's option, be deferred to a later Closing Date pursuant to
SECTION 4.6(a), where the matters so described would have a Material Adverse
Effect on such Existing Site. The sole remedy of CCIC and TowerCo in respect of
any such disclosure as to any Site shall be to cause such Site to be a
Maintained Site pursuant to SECTION 3.3 or, at the applicable Transferring
Entity's option pursuant to SECTION 4.6, to be an Excluded Site hereunder or to
defer the Closing for such Site to a later Closing Date.

     4.7  RE-RECORDATION.  Whenever in this Agreement either party is required
or has the right to record or re-record any document, including without
limitation any Site Designation Supplement, Ground Lease or a memorandum
thereof, TowerCo shall, or shall cause the agent effecting such recordation to,
deliver a copy of the document to the other party promptly after receipt
thereof, and in any event contemporaneously with its first delivery thereof to
the recording party.

     4.8 TITLE SEARCHES. For each Closing, TowerCo shall (i) cause a national
title insurance company with licensed agents in each part of the Territory to
cause a full title search to be undertaken as to each Site in such part of the
Territory for which BSPCI does not have a recent title search or report and (ii)
may cause such a title insurance company to cause a bring-down of existing title
searches or reports on Sites for which BSPCI has a recent title search, report
or bring-down. TowerCo shall deliver copies of each such title search to BSPCI
not less than ten (10) days prior to the date scheduled for such Closing in the
Closing Schedule, and in any event contemporaneously with the delivery of such
searches to any Crown Affiliate or agent of any Crown Affiliate. Each
Transferring Entity whose Sites are covered by the foregoing obligation shall
provide access to any documents reasonably available to it, to the extent
necessary to facilitate such title search.

                                   ARTICLE 5
                             ADDITIONAL AGREEMENTS

     5.1 EXPENSES. (a) Except as otherwise provided herein, all expenses
incurred by TowerCo in connection with the negotiations among the parties, and
the authorization, preparation, execution and performance of the Transaction
Documents and the transactions contemplated hereby shall be paid by TowerCo.

        (b) Except as otherwise provided herein, all expenses incurred by CCIC
in connection with the negotiations among the parties, and the authorization,
preparation, execution

                                       16
<PAGE>

and performance of the Transaction Documents and the transactions contemplated
hereby shall be paid by CCIC.

        (c) Except as otherwise provided herein, all expenses incurred by the
Transferring Entities in connection with the negotiations among the parties, and
the authorization, preparation, execution and performance of the Transaction
Documents and the transactions contemplated hereby shall be paid by the
Transferring Entities; provided that BSPCI may allocate a pro rata portion of
fees, costs and expenses that are not specific to its Sites to the Carolinas
Partnership, based on its percentage of all Included Sites.

     5.2 BROKERS. Each Transferring Entity hereby represents and warrants to
TowerCo that no broker or finder has acted on its behalf in connection with this
Agreement or the transactions contemplated herein and agrees to indemnify
TowerCo Indemnitees from and against any and all claims or demands for
commissions or other compensation by any broker, finder or similar agent
claiming to have been employed by or on behalf of BSPCI. CCIC and TowerCo,
jointly and severally, hereby represent and warrant to each Transferring Entity
that no broker or finder has acted on their behalf or on behalf of any of them
in connection with this Agreement or the transactions contemplated herein and
each of them agrees, jointly and severally, to indemnify BSPCI Indemnitees from
and against any and all claims or demands for commissions or other compensation
by any broker, finder or similar agent claiming to have been employed by or on
behalf of the CCIC and TowerCo.

     5.3 RISK OF LOSS AND INSURANCE. Between the date of this Agreement and each
Closing, the risks and obligations of ownership and loss of the Transferred
Interests with respect to the Sites subject to such Closing and the correlative
rights against insurance carriers and third parties shall belong to the
applicable Transferring Entity. In the event of the damage or destruction of all
or a substantial portion of the Transferred Interests prior to any Closing, the
affected Sites shall become Excluded Sites and the Consideration shall be
reduced in accordance with SECTION 3.3, unless the parties agree to the
contrary.

     5.4 CONDEMNATION. In the event of the taking of any part of the Transferred
Interest of any Site, or any interest therein, by eminent domain proceedings, or
the commencement or bona fide threat of the commencement of any such
proceedings, prior to any Closing, the affected Sites shall become Excluded
Sites and the Consideration shall be reduced in accordance with SECTION 3.3,
unless the parties agree to the contrary.

     5.5 PUBLICITY. Except as required by applicable Laws or any applicable
stock exchange rules, all press releases and other public announcements with
respect to the subject matter hereof, including the time, form and content of
such release or announcement, shall be made only with the mutual written
agreement of TowerCo and BSPCI; provided, however, that any disclosure required
to be made under applicable Law or any applicable stock exchange rules may be
made only if a party required to make such disclosure has determined in good
faith that it is necessary to do so and has used its reasonable best efforts,
prior to the issuance of the

                                       17
<PAGE>

disclosure, to provide the other parties with a copy of the proposed disclosure
and to discuss the proposed disclosure with the other parties.

     5.6 TOWERCO'S ACCESS AND INSPECTION. The Transferring Entities shall
provide TowerCo and its authorized representatives (i) reports as to the Sites
in electronic form, to the extent reasonably available and (ii) reasonable
access during normal business hours from and after the date hereof until the
Final Closing to the books and records of the Transferring Entities relating to
the Transferred Interests and for physical inspection of the Transferred
Interest, for the purpose of making such investigation as TowerCo may reasonably
desire, and each such party shall reasonably promptly furnish TowerCo such
information concerning the Transferred Interests as TowerCo may reasonably
request. BSPCI shall reasonably assist TowerCo in making such investigation and
shall cause BSPCI's counsel, accountants, consultants and other non-employee
representatives to be reasonably available to TowerCo for such purposes.

     5.7 COOPERATION. The parties shall cooperate fully with each other and
with their respective counsel and accountants in connection with any steps
required to be taken as part of their respective obligations hereunder, and all
parties shall use commercially reasonable efforts to consummate the transactions
contemplated herein and to fulfill their obligations hereunder, including,
without limitation, causing to be fulfilled at the earliest practical date the
conditions precedent to the obligations of the parties to consummate the
transactions contemplated hereby set forth in ARTICLES 10 and 11.  Without the
prior written consent of the other parties, no party hereto may take any
intentional action that would cause the conditions precedent to the obligations
of the parties hereto to effect the transactions contemplated hereby not to be
fulfilled, including, without limitation, taking or causing to be taken any
action that would cause the representations and warranties made by such party
herein not to be true, correct and complete as of each Closing.

     5.8 GOVERNMENTAL FILINGS. (a) The parties shall make, or cause to be made,
all filings and submissions required to be made to any Government in connection
with the transactions contemplated by this Agreement, provided however that the
parties acknowledge and agree that no filings or submissions are required under
the Hard-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR
ACT").

        (b) Each party hereto agrees to use commercially reasonable efforts to
comply with all legal requirements which may be imposed on such party with
respect to the transactions contemplated by the Transaction Documents and to
obtain all consents, orders and approvals that may be or become necessary for
the consummation of the transactions contemplated by the Transaction Documents
and each  party shall furnish to the other parties such necessary information
and reasonable assistance as other parties may reasonably request in connection
with the preparation of necessary filings or submissions to any governmental or
other regulatory agency in promptly seeking to obtain all such consents, orders
and approvals.

                                       18
<PAGE>

     5.9 CONFIDENTIALITY. (a) The parties acknowledge and agree that in the
course of their discussions and negotiations of the Transaction Documents and
the transactions contemplated herein, a party hereto (the "DISCLOSING PARTY")
may already have disclosed or may hereafter disclose Confidential Information
(as defined below) to one or more of the other parties hereto (each, a
"DISCLOSEE").  Each party agrees that if the transactions contemplated herein
are not consummated, it will return to the Disclosing Party all documents and
other written information furnished to it.  Each party further agrees to
maintain the confidentiality of any and all Confidential Information of a
Disclosing Party and not disclose or give any Confidential Information to any
Person or use such Confidential Information, provided, however, that the
foregoing obligations will not apply to:  (i) any information which was lawfully
known by the Disclosee free of any obligation of confidentiality to any Person
prior to its disclosure by the Disclosing Party; (ii) any information which was
in the public domain prior to the disclosure thereof; (iii) any information
which comes into the public domain through no fault of the Disclosee; (iv) any
information which is disclosed to the Disclosee by a third party, other than an
Affiliate, having the legal right to make such disclosure; (v) any information
which is required to be disclosed by Order of any Forum or as required by Law;
(vi) TowerCo's disclosure of Confidential Information to third parties if
reasonably related to TowerCo's Permitted Use of the Sites as contemplated in
the Transaction Documents or (vii) the disclosure of Confidential Information by
a Transferring Entity to a BellSouth Entity Affiliate, any lender of a
Transferring Entity or a BellSouth Entity Affiliate, or any of their respective
agents.  Without limiting the generality of the foregoing, each party agrees
that, when acting as a Disclosee, it will (a) restrict the disclosure of the
Confidential Information of the Disclosing Party to those employees of Disclosee
who require such information for the purposes contemplated hereunder, (b) notify
(x) all of its employees to whom Confidential Information of the Disclosing
Party is disclosed and (y) all other Persons to whom it is permitted hereunder
to disclose Confidential Information of the Disclosing Party not to use or
disclose such Confidential Information in violation of this Agreement, (c)
prevent use or disclosure by its employees of the Confidential Information of
the Disclosing Party, except as provided herein, and (d) promptly inform the
Disclosing Party of any use or disclosure of the Confidential Information of the
Disclosing Party, whether intentional or not, which violates the provisions of
this section and of which Disclosee has any knowledge.

     (b) For purposes of this SECTION 5.9, "CONFIDENTIAL INFORMATION" means any
and all technical, business, and other information which is (i) possessed or
hereafter acquired by a Disclosing Party and (ii) derives economic value, actual
or potential, from not being generally known to Persons other than the
Disclosing Party, including, without limitation, technical or nontechnical data,
compositions, devices, methods, techniques, drawings, inventions, processes,
financial data, financial plans, lists of actual or potential customers or
suppliers, information regarding the business plans and operations of the
Disclosing Party, and the existence of discussions and negotiations between the
parties hereto relating to the terms hereof; provided, however, it does not
include confidential business information that does not constitute a trade
secret under applicable law after the first (1st) anniversary of the date
hereof.  The provisions of this SECTION 5.9 shall survive any termination of
this Agreement for any reason and shall remain

                                       19
<PAGE>

in full force and effect from and after the Initial Closing Date so long as the
Sublease and the Site Maintenance Agreement remain in full force and effect.

     (c) Each of CCIC and TowerCo acknowledges and agrees that the databases
respecting the Sites maintained on behalf of BSPCI are owned by BSPCI and
constitute trade secrets of BSPCI.  Any data from such databases that BSPCI
provides to CCIC may be used by CCIC in accordance with the terms of this
Agreement, including without limitation SECTION 5.9.

   5.10 REAL ESTATE MATTERS. (a) Prior to the applicable Closing, CCIC shall
notify BSPCI and the Carolinas Partnership if the Ground Lease or a memorandum
thereof has not been recorded for any Site. TowerCo shall use its commercially
reasonable efforts to effect such recordation, at its sole cost and expense,
except where prohibited by Law or the terms of the applicable Ground Lease. The
applicable Transferring Entity shall execute documents reasonably requested by
CCIC to effect such recordation, and shall cooperate with TowerCo in pursuing
such recordation.

     (b) If notwithstanding the foregoing efforts, TowerCo is unable to record
any theretofore unrecorded Ground Lease or memorandum thereof in respect of any
Site, then TowerCo shall nonetheless use reasonable efforts to cause the Site
Designation Supplement for such Site to be duly recorded, including on the face
of the applicable Site Designation Supplement a cross reference to the
applicable deed and its recording information, submitting the Site Designation
Supplement for recordation (which Site Designation Supplement shall include a
copy of the applicable Ground Lease or a memorandum thereof), requesting that
the clerk of the applicable jurisdiction cross-index the Site Designation
Supplement to the grantor-grantee index and otherwise using reasonable efforts
to effect such recordation; provided, however, that nothing contained in this
SECTION 5.10 (including any failure of TowerCo to record any Ground Lease or a
memorandum thereof or a Site Designation Supplement in the absence of such
recordation) shall constitute a condition precedent to CCIC's or TowerCo's
obligation to close the transactions contemplated by this Agreement with respect
to such Site or otherwise release CCIC or TowerCo from the obligation to treat
such Site as an Included Site at the applicable Closing.

     (c) The applicable Transferring Entity and, after the applicable Closing,
TowerCo shall each have the right to place, each at its sole cost and expense,
accurate signage on each Site to put third parties on notice of its interest in
such Site, subject to compliance with applicable Laws.

     (d) Notwithstanding anything to the contrary contained herein, if TowerCo
is unable to record any unrecorded Ground Lease or memorandum thereof in respect
of any Site, record a Site Designation Supplement as aforesaid or otherwise to
protect the applicable Transferring Entity's interest in such Site and at any
time thereafter the applicable Transferring Entity loses its interest under the
Ground Lease by virtue of a foreclosure of a prior Mortgage on the fee interest
of such Site, TowerCo will have no claim against either Transferring Entity in

                                       20
<PAGE>

respect thereof, but if such Transferring Entity desires to locate another Tower
in the same general area, TowerCo will have the right to build the Tower for
such Transferring Entity pursuant to the Build to Suit Agreement, and such Tower
shall become subject to the Sublease.  No such Tower will constitute a
Qualifying Site, as defined in the Build to Suit Agreement.

     (e) Following the applicable Closing, TowerCo and each Transferring Entity
whose Sites were the subject of a Site Designation Supplement and whose Ground
Lease or memorandum was not recorded, shall continue reasonable efforts to cause
the Ground Lease or a memorandum thereof to be recorded.  Such obligation shall
expire on the first anniversary of the Final Closing.  If any such Ground Lease
or a memorandum is thereafter recorded in respect of any Site, the parties shall
re-record the Site Designation Supplement for such Site.

     (f) Each Site Designation Supplement shall be in recordable form.  CCIC
shall be responsible for effecting the recordation of all Site Designation
Supplements, unless prohibited by Law or by the applicable Ground Lease, and
CCIC shall bear all costs and expenses incurred in connection therewith.
Promptly after effecting such recordation, CCIC shall give the applicable
Transferring Entity written confirmation of such recordation and copies of the
recorded documents.

   5.11 UPDATE OF INFORMATION. At all times prior to the Final Closing, TowerCo
and CCIC shall promptly provide the Transferring Entities, and the Transferring
Entities, subject to SECTION 4.6(b), shall promptly provide CCIC with written
notification of any material fact, event, occurrence or other information of any
kind whatsoever which affects, or may affect, the truthfulness, correctness or
completeness of any representation, warranty, covenant or agreement made in this
Agreement, any other Transaction Document or any document, agreement,
instrument, certificate or writing furnished to any party or its respective
Affiliates pursuant to or in connection with this Agreement, or which affects or
may affect the continued truthfulness, correctness or completeness of any
thereof through the date of the Final Closing. Each such written notification
shall specifically identify all representations, warranties, covenants and
agreements affected by the fact, event, occurrence or information that
necessitated the giving of the notice; provided, that, except as set forth in
SECTION 4.6(b), no such notification of any material fact, event, occurrence or
other information shall be deemed to modify, amend or supplement any such
representation, warranty, covenant and agreement.

   5.12 CCIC'S GUARANTY. (a) CCIC unconditionally guarantees to each
Transferring Entity the full and timely performance and observance of all of the
terms, provisions, covenants and obligations of TowerCo under this Agreement and
other Transaction Documents and any Affiliate of TowerCo under any Transaction
Documents (the "OBLIGATIONS"). CCIC agrees that if TowerCo or TowerCo's
Affiliate defaults at any time in the performance of any of the Obligations,
CCIC shall faithfully perform and fulfill all Obligations and shall pay to the
applicable Transferring Entity all reasonable attorneys' fees, court costs, and
other expenses,

                                       21
<PAGE>

costs and disbursements incurred by it on account of any default by TowerCo or
TowerCo's Affiliate and on account of the enforcement of this guaranty.

          (b) If TowerCo or TowerCo's Affiliate defaults under this Agreement or
any Transaction Documents, and BSPCI elects (on its own behalf and on behalf of
the Carolinas Partnership) to enforce the provisions of this SECTION 5.12, BSPCI
shall promptly give CCIC reasonably detailed written notice thereof, which
notice shall constitute an exercise of BSPCI's rights against CCIC pursuant to
this SECTION 5.12.  Following the receipt of such notice by CCIC, CCIC shall
have the same period of time as is afforded to TowerCo or TowerCo's Affiliate
under this Agreement or any Transaction Documents to cure such default, but no
such cure period shall diminish the obligations of CCIC under this SECTION 5.12.

          (c) This guaranty obligation of CCIC shall be enforceable by BSPCI in
an Action against CCIC without the necessity of any Action by BSPCI of any kind
or nature whatsoever against TowerCo or its Affiliate, without the necessity of
any notice to CCIC of TowerCo's or its Affiliate's default or breach under this
Agreement or any Transaction Documents, and without the necessity of any other
notice or demand to CCIC to which CCIC might otherwise be entitled, all of which
notices CCIC hereby expressly waive.  CCIC hereby agrees that the validity of
this guaranty and the obligations of CCIC hereunder shall not be terminated,
affected, diminished, or impaired by reason of the assertion or the failure to
assert by BSPCI against TowerCo or its Affiliate any of the rights or remedies
reserved to BSPCI pursuant to the provisions of this Agreement or any
Transaction Documents or any other remedy or right which BSPCI may have at law
or in equity or otherwise.

          (d) CCIC covenants and agrees that this guaranty is an absolute,
unconditional, irrevocable and continuing guaranty.  The liability of CCIC
hereunder shall not be affected, modified, or diminished by reason of any
modification or termination of this Agreement and any other Transaction
Documents or any modification or waiver of or change in any of the covenants and
terms of this Agreement or any Transaction Documents by agreement of BSPCI and
TowerCo or its Affiliate, or by any unilateral action of either BSPCI or TowerCo
or its Affiliate, or by an extension of time that may be granted by BSPCI to
TowerCo or its Affiliate or any indulgence of any kind granted to TowerCo or its
Affiliate, or any dealings or transactions occurring between BSPCI and TowerCo
or its Affiliate, including, without limitation, any adjustment, compromise,
settlement, accord and satisfaction, or release, or any bankruptcy, insolvency,
reorganization, arrangement, assignment for the benefit of creditors,
receivership, or trusteeship affecting TowerCo or its Affiliate.  CCIC does
hereby expressly waive any suretyship defense it may have by virtue of any Law
of any state or Government.

          (e) All of BSPCI's' rights and remedies under this guaranty are
intended to be distinct, separate, and cumulative and no such right and remedy
herein is intended to be the exclusion of or a waiver of any other.

          (f) CCIC hereby waives presentment, demand for performance, notice of
nonperformance, protest, notice of protest, notice of dishonor, and notice of
acceptance.  CCIC

                                       22
<PAGE>

further waives any right to require that an action be brought against TowerCo or
its Affiliate or any other person or to require that resort be had by BSPCI to
any security held by BSPCI. The provisions of this SECTION 5.12 shall survive
any termination of this Agreement.

                                   ARTICLE 6
                          REPRESENTATIONS, WARRANTIES
                    AND COVENANTS OF TRANSFERRING ENTITIES

     As an inducement to CCIC and TowerCo to enter into and perform each and all
Transaction Documents, each Applicable Transferring Entity, severally and not
jointly, hereby represents and warrants to CCIC and TowerCo, as to itself and
its Sites, as follows (such representations and warranties being deemed made as
of the date of each Closing):

     6.1 ORGANIZATION, AUTHORITY AND QUALIFICATION. BSPCI is a corporation,
duly organized, validly existing and in good standing under the laws of the
State of Delaware and the Carolinas Partnership is a limited partnership, duly
organized, validity existing and in good standing under the laws of the State of
Delaware.  Each Transferring Entity is duly authorized, licensed or qualified to
do business in any jurisdiction where the ownership, use or occupancy of the
Sites would require it to be authorized, licensed or qualified, except where the
failure to be authorized, licensed or qualified would not have a Material
Adverse Effect.  Each Transferring Entity has the requisite corporate or
partnership power and authority to own, lease, sublease, use and occupy the
Sites as they are now being owned, leased, subleased, used and occupied by such
Transferring Entity.  Each Transferring Entity has the right, power and
authority to transfer the Transferred Interests of its Sites in accordance with
the terms, provisions and conditions of this Agreement and other Transaction
Documents.

     6.2 CAPACITY; INCONSISTENT OBLIGATIONS. (a) Each Transferring Entity has
the corporate or partnership power and authority to execute and deliver the
Transaction Documents to which it is a party and to perform and comply with the
Transaction Documents to which such Transferring Entity is a party in accordance
with their respective terms. The Transaction Documents to which each
Transferring Entity is a party have been, or will be, prior to the first Closing
in which any of its Sites is included, duly and validly executed and delivered
by such Transferring Entity and constitute, or will constitute, prior to the
first Closing in which any of its Sites is included, the valid and legally
binding obligations of such Transferring Entity subject to general equity
principles, enforceable in accordance with their respective terms, except as the
same may be limited by bankruptcy, insolvency, reorganization or similar laws
affecting the rights of creditors generally.

          (b) Except as set forth in the Disclosure Schedule, neither the
execution and delivery of the Transaction Documents to which such Transferring
Entity is a party, nor the consummation of the transactions contemplated therein
will (i) result in a violation of such Transferring Entity's articles of
incorporation or bylaws, or (ii) to such Transferring Entity's knowledge, result
in a breach of or default under any term or provision of any contract or

                                       23
<PAGE>

agreement to which such Transferring Entity is a party, except where such breach
or default would not have a Material Adverse Effect.

     6.3 CONSENTS. Except for the consents specified in the Disclosure
Schedule with respect to each Closing, the execution and delivery by each
Transferring Entity of this Agreement and other Transaction Documents to which
such Transferring Entity is a party, the consummation of the transactions
contemplated herein and therein, and the performance by such Transferring Entity
hereunder and thereunder does not require the consent, approval or action of, or
any filing with or notice to, any Government or other Person.

     6.4 NO VIOLATION; COMPLIANCE WITH LAWS. Except as set forth in the
Disclosure Schedule, no Transferring Entity is in default under or in violation
of (a) its articles of incorporation or bylaws, (b) any Order to which such
Transferring Entity is subject, or (c) any Existing Leases, except where such
defaults or violations would not have a Material Adverse Effect.  Each
Transferring Entity has complied with all applicable Laws, except where the
failure to have so complied would not have a Material Adverse Effect.

     6.5 LITIGATION; CONTINGENCIES. Except as set forth in the Disclosure
Schedule, there are no Actions pending or to the best of each Transferring
Entity's knowledge, threatened against, by or affecting such Transferring Entity
which adversely affect the Transferred Interests or which question the validity
or enforceability of this Agreement.  There are no unsatisfied judgments or
Orders against any Transferring Entity to which the Transferred Interests are
subject.

     6.6 LEASED AND OWNED SITES. Except as set forth in the Disclosure
Schedule: (a)(i) Such Transferring Entity holds a valid leasehold interest or
a Qualifying Interest in each of its Leased Sites pursuant to a Ground Lease,
and (ii) to the best knowledge of the applicable Transferring Entity, (x) each
of the Ground Leases is in full force and effect, (y) neither the Transferring
Entity nor the Ground Lessor is in breach of the Ground Lease, except for
breaches that would not have a Material Adverse Effect, and (z) such
Transferring Entity has delivered to CCIC copies of each of the Ground Leases,
which copies are true, correct and complete in all material respects.

        (b) To the best knowledge of the applicable Transferring Entity, such
Transferring Entity holds valid fee simple title to each of the Owned Sites,
free and clear of all Liens other than Permitted Liens.

     6.7 REAL PROPERTY. To the best knowledge of the Applicable Transferring
Entity, as to each Existing Site, except as set forth in the Disclosure
Schedule:

        (a) Such Transferring Entity's ownership, lease or use of the Land
included in the Transferred Interests respecting such Existing Site is in
compliance with all applicable zoning and other land use requirements where the
failure to so comply would materially limit such

                                       24
<PAGE>

Transferring Entity's ability to use such Land in the ordinary course of its
business, or the Permitted Use of such Land.

        (b) The utility services currently available to such Existing Site are
adequate for the present use of such Existing Site by such Transferring Entity,
are being supplied to such Transferring Entity by utility companies or pursuant
to valid and enforceable contracts or tariffs, and there is no condition which,
to the best of such Transferring Entity's knowledge, will result in the
termination of the present access from such Existing Site to such utility
services.

        (c) Such Transferring Entity has obtained all easements and rights-of-
way that are reasonably necessary to provide vehicular and pedestrian ingress
and egress to and from each of the Existing Sites for the purposes used by such
Transferring Entity in the ordinary course. No Action is pending or threatened
which would have the effect of terminating or limiting such access.

        (d) No breach or event of default by such Transferring Entity has
occurred and is continuing under any Ground Lease and Existing Lease, as
applicable, respecting one or more Sites, except where such breach or event of
default would not have a Material Adverse Effect.

     6.8 EMINENT DOMAIN. Except as set forth in the Disclosure Schedule, no
Transferring Entity has received any written notice that any Government having
the power of eminent domain over any of the Land included in the Transferred
Interests has commenced or intends to exercise the power of eminent domain or a
similar power with respect to all or any part of such Land.

     6.9 TAXES. To the best knowledge of the applicable Transferring Entity,
except as set forth in the Disclosure Schedule, (i) such Transferring Entity has
duly and timely filed all federal, state, municipal and local Tax returns and
reports (collectively, "RETURNS") with respect to all Taxes owing in respect of
its Existing Sites, (ii) all Taxes imposed on a Transferring Entity in respect
of its Existing Sites by any Government which have become due and payable by
such Transferring Entity for all periods through the date of this Agreement have
been paid in full, (iii) there are no proposed assessments against such
Transferring Entity of additional Taxes in respect of its Existing Sites, and
(iv) there is no dispute or Action concerning any Tax Liability of such
Transferring Entity raised by a Government in writing.

     6.10 GOVERNMENTAL PERMITS. To the best knowledge of the applicable
Transferring Entity, except as set forth in the Disclosure Schedule:  (i) such
Transferring Entity has obtained all Governmental Permits that are required for
the ownership, use or occupancy of its Existing Sites or the Transferred
Interests, all of which are in full force and effect, except where the failure
to obtain any such Governmental Permit or of any such Governmental Permit to be
in full force and effect would not have a material adverse effect on such
Transferring Entity or its business or on the Permitted Use; and (ii) each
Transferring Entity has complied with all such

                                       25
<PAGE>

Governmental Permits, except where the failure to comply would not have a
material adverse effect on such Transferring Entity or on the Permitted Use.

     6.11 ENVIRONMENTAL MATTERS. Except as set forth in the Disclosure
Schedule, to the best of each Transferring Entity's knowledge, no Environmental
Condition exists and no pending or threatened Action in respect of any
Environmental Condition exists at any of its Existing Sites which would have a
material adverse effect on such Transferring Entity's use of such Existing Site
consistent with past practices or on TowerCo's use of such Existing Site
consistent with the Sublease.

     6.12 EXISTING LEASES; COLOCATION AGREEMENTS; MASTER LICENSE AGREEMENTS;
OTHER AGREEMENTS. To the best knowledge of each Transferring Entity, except
for the Existing Leases and Colocation Agreements set forth in the Disclosure
Schedule, there are no leases or other agreements for use, occupancy or
possession presently in force with respect to all or any portion of the Sites.
Each Transferring Entity has made available to CCIC and TowerCo copies of the
Existing Leases, Colocation Agreements and other agreements identified in the
Disclosure Schedule.  To the best knowledge of each Transferring Entity, such
copies are true and complete in all material respects and include all material
amendments, supplements and modifications thereto or material waivers currently
in effect thereunder.

     6.13 NO UNDISCLOSED LIABILITIES. To the best knowledge of the applicable
Transferring Entity, except as set forth in the Disclosure Schedule, no
liabilities or obligations (whether pursuant to Contracts or otherwise) of any
kind whatsoever (whether accrued, contingent, absolute, determined, determinable
or otherwise) have been incurred by any Transferring Entity with respect to the
Transferred Interests and which have had or could reasonably be expected to have
a Material Adverse Effect after the consummation of the transactions
contemplated hereby, other than liabilities or obligations disclosed or provided
for in the Transaction Documents.

     6.14 AUTHORIZATION. Each of BSPCI and the Carolinas Partnership has the
requisite power and authority to execute this Agreement and the Transaction
Documents to which any of them is a party and to consummate the transactions
performed or to be performed by any or all of them hereunder and thereunder.
Such execution, delivery and performance by BSPCI and the Carolinas Partnership
have been duly authorized by all necessary action. This Agreement and the
Transaction Documents constitute valid and binding obligations of the
Transferring Entities, enforceable in accordance with their respective terms.

     6.15 NO OTHER WARRANTIES. Except for the representations, warranties and
covenants expressly set forth in this ARTICLE 6, and subject to SECTION 3(a) of
the Sublease, the Transferred Interests are being transferred by Transferring
Entities AS IS, WHERE IS, and with all faults, and there are no other warranties
being made by any of the Transferring Entities INCLUDING, WITHOUT LIMITATION,
ANY WARRANTY OF HABITABILITY, MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, EXPRESS OR IMPLIED, IN CONNECTION WITH THE TRANSFER OF THE TRANSFERRED
INTERESTS OR THE OTHER

                                       26
<PAGE>

TRANSACTIONS CONTEMPLATED BY THE TRANSACTION DOCUMENTS. Each of CCIC and TowerCo
acknowledges and agrees that: (i) no examination or investigation of the
Transferred Interests by or on behalf of TowerCo prior to any Closing shall in
any way modify, affect or increase a Transferring Entity's obligations under the
representations, warranties, covenants and agreements set forth in this ARTICLE
6; and (ii) any representation or warranty as to the adequacy of any Site or the
Tower or Improvements thereon is limited to the adequacy to the applicable
Transferring Entity and not to TowerCo, CCIC or any other Person.

                                   ARTICLE 7
                          REPRESENTATIONS, WARRANTIES
                           AND COVENANTS OF TOWERCO

     As an inducement to the Transferring Entities to enter into and perform
each and all Transaction Documents, TowerCo hereby represents and warrants to
each of the Transferring Entities as follows:

     7.1 ORGANIZATION, AUTHORITY AND QUALIFICATION. TowerCo is a corporation
duly organized and validly existing under the laws of the State of Delaware.
TowerCo has its principal office and place of business at the location specified
in SCHEDULE 7.1. TowerCo has or will have at the time of the applicable Closing
full corporate power and authority to carry on its business as it has been, now
being conducted and to own or lease its properties and to carry on its
businesses as and in all places where such business is currently conducted and
such properties are or will be owned or leased. TowerCo is or will be at the
time of the applicable Closing duly authorized, licensed or qualified to do
business in all the jurisdictions where such business and the ownership, use and
occupancy of such properties would require it to be authorized, licensed or
qualified.

     7.2 OWNERSHIP OF SHARES; SUBSIDIARIES. (a) TowerCo has a total authorized
share capital consisting of 3,000 common shares, par value $.01 per share, of
which 1,000 shares are presently issued and outstanding ("TOWERCO SHARES"), and
all such issued and outstanding shares are owned of record and beneficially by
CCIC or a wholly owned subsidiary of CCIC. All such issued TowerCo Shares are
duly authorized, validly issued, fully paid and nonassessable and were
authorized, offered, issued and sold in accordance with all applicable
securities and other Laws. The certificate of incorporation of TowerCo does not
provide for preemptive rights in favor of any Person. There are no outstanding
securities convertible into the share capital or rights to subscribe for or to
purchase, or any options for the purchase of, or any agreements or arrangements
providing for the issuance (contingent or otherwise) of, or any Actions relating
to, the share capital of TowerCo.

          (b) Except as set forth on SCHEDULE 7.2, TowerCo does not own and has
no interest, direct or indirect, or any commitment to purchase or otherwise
acquire, any share capital or other equity interest, direct or indirect, in, or
to make any loan or other investment in, any other Person.

                                       27
<PAGE>

          (c) CCIC or a wholly owned subsidiary of CCIC is the sole owner of the
TowerCo Shares, free and clear of any and all pledges, security interests,
options or rights of others.

     7.3  CAPACITY; INCONSISTENT OBLIGATIONS.  (a) TowerCo has the corporate
power and authority to execute and deliver the Transaction Documents to which it
is a party and to perform and comply with the Transaction Documents to which it
is a party in accordance with their respective terms.  The Transaction Documents
to which TowerCo is a party have been duly and validly executed and delivered by
TowerCo and constitute the valid and legally binding obligations of TowerCo
subject to general equity principles, enforceable in accordance with their
respective terms, except as the same may be limited by bankruptcy, insolvency,
reorganization or similar laws affecting the rights of creditors generally.

          (b) Neither the execution and delivery of the Transaction Documents to
which TowerCo is a party, nor the consummation of the transactions contemplated
therein will (i) result in a violation of TowerCo's certificate of incorporation
or bylaws, (ii) to TowerCo's knowledge, result in a breach of or default under
any term or provision of any contract or agreement to which  TowerCo is a party,
except where such breach or default would not have a material adverse effect on
TowerCo, or (iii) result in the creation or imposition of any Liens upon its
properties and assets, other than Permitted Liens.

     7.4  CONSENTS.  Except for compliance with (a) the consents specified in
SCHEDULE 7.4, and (b) the consents specified in the Closing Schedule with
respect to each Closing, the execution and delivery by TowerCo of this Agreement
and other Transaction Documents to which it is a party, the consummation of the
transactions contemplated herein and therein, and the performance by TowerCo
hereunder and thereunder does not require the consent, approval or action of, or
any filing with or notice to, any Government or other Person.

     7.5  NO VIOLATION; COMPLIANCE WITH LAWS.  Except as set forth in SCHEDULE
7.5, TowerCo is not in default under or in violation of (a) its certificate of
incorporation or bylaws, (b) to TowerCo's knowledge, any Order to which TowerCo
is subject, (c) any material contract to which it is a party, except where such
defaults or violations would not have a material adverse effect on TowerCo or
its business.  TowerCo has complied with all applicable Laws, except where the
failure to have so complied would not have a material adverse effect on TowerCo
or its business.

     7.6  LIABILITIES.  TowerCo has no Liabilities, except (i) those reflected
on the TowerCo Existing Financial Statements or Liabilities disclosed in
SCHEDULE 7.6 to the Transaction Documents to which TowerCo is a party, (ii)
Liabilities incurred in the ordinary course of business, and (iii) those that
will not have a material adverse effect on TowerCo or its business.

                                       28
<PAGE>

     7.7  LITIGATION; CONTINGENCIES.  There are no Actions pending or, to the
best of TowerCo's knowledge, threatened against, by or affecting TowerCo
properties and assets or that question the validity or enforceability of this
Agreement.

     7.8  NO BROKER.  No broker, finder or similar agent has acted on behalf
of TowerCo in connection with this Agreement or the transactions contemplated
herein.

     7.9  NO OTHER WARRANTIES.  Except for the representations, warranties and
covenants expressly set forth in this ARTICLE 7, TowerCo has not made nor is
making any representations or warranties to BSPCI or the Transferring Entities,
express or implied, in connection with the transactions contemplated by this
Agreement.

                                   ARTICLE 8
               REPRESENTATIONS, WARRANTIES AND COVENANTS OF CCIC

     As an inducement to the Transferring Entities to enter into and perform
each and all Transaction Documents, CCIC hereby represents and warrants to each
of the Transferring Entities as follows:

     8.1  ORGANIZATION, AUTHORITY AND QUALIFICATION.  CCIC is a corporation
duly organized and validly existing under the laws of the State of Delaware.
CCIC is duly authorized, licensed or qualified in all the jurisdictions where
such authorization, license or qualification is necessary.

     8.2  CAPACITY; INCONSISTENT OBLIGATIONS.  (a) CCIC has the corporate
power and authority to execute and deliver the Transaction Documents to which it
is a party and to perform and comply with the Transaction Documents to which it
is a party in accordance with their respective terms.  The Transaction Documents
to which CCIC is a party have been duly and validly executed and delivered by
CCIC and constitute the valid and legally binding obligations of CCIC subject to
general equity principles, enforceable in accordance with their respective
terms, except as the same may be limited by bankruptcy, insolvency,
reorganization or similar laws affecting the rights of creditors generally.

          (b) Neither the execution and delivery of the Transaction Documents to
which CCIC is a party, nor the consummation of the transactions contemplated
therein will (i) result in a violation of CCIC's articles of incorporation or
bylaws, or (ii) to CCIC's knowledge, result in a breach of or default under any
term or provision of any contract or agreement to which  CCIC is a party, except
where such breach or default would not have a material adverse effect on CCIC.

     8.3  CONSENTS.   Except for compliance with the consents specified in
SCHEDULE 8.3, the execution and delivery by CCIC of the Transaction Document to
which it is a party, the consummation of the transactions contemplated therein,
and the performance by CCIC thereunder does not require the consent, approval or
action of, or any filing with or notice to, any

                                       29
<PAGE>

Government or other Person. Without limiting the generality of the foregoing,
CCIC represents and warrants that no such consent is required under any CCIC
Indenture, and agrees that it will not amend or modify any CCIC Indenture in any
manner that would cause this representation and warranty to no longer by true
and correct.

     8.4  NO VIOLATION; COMPLIANCE WITH LAWS. Except as set forth in SCHEDULE
8.4, CCIC is not in default under or in violation of (a) its articles of
incorporation or bylaws, (b) to CCIC's best knowledge, any Order to which CCIC
is subject, or (c) any material contract to which it is a party except where
such defaults or violations would not have a material adverse effect on CCIC or
its business. CCIC has complied with all applicable Laws, except where the
failure to have so complied would not have a material adverse effect on CCIC or
its business.

     8.5  LITIGATION; CONTINGENCIES. There are no Actions pending or to the best
knowledge of CCIC, threatened against, by or affecting CCIC that question the
validity or enforceability of this Agreement.

     8.6  NO OTHER WARRANTIES.  Except for the representations, warranties and
covenants expressly set forth in this ARTICLE 8, CCIC has not made nor is making
any representations or warranties to BSPCI or the Transferring Entities, express
or implied, in connection with the transactions contemplated by this Agreement.

                                   ARTICLE 9
                              CONDUCT OF BUSINESS
                               PENDING CLOSINGS

     9.1  CONDUCT OF BUSINESS BY THE TRANSFERRING ENTITIES.  Each Transferring
Entity severally and not jointly covenants and agrees that pending each Closing,
except as otherwise agreed to in writing by TowerCo, and except in connection
with the performance of the transactions contemplated hereby, as to its Existing
Sites only:

        (a) Since July 1, 1999, such Transferring Entity has operated,
maintained and serviced, and from and after the date hereof such Transferring
Entity shall operate, maintain and service, the Sites in the ordinary course of
business consistent with past practices and in compliance in all material
respects with all applicable Laws, including without limitation entering into
any leases, licenses or subleases of its Sites in the ordinary course of
business consistent with past practices, provided that such leases, licenses or
subleases shall constitute Existing Leases. The parties specifically agree that,
under the foregoing, each Transferring Entity has added and subtracted antennas
from the Site in the ordinary course of business, and any net additions of
antennas made prior to the date hereof shall not constitute a breach of the
foregoing so long as made in the ordinary course of business consistent with
past practices.

        (b) Each Transferring Entity shall use its commercially reasonable
efforts to conduct its business in such a manner that on each Closing Date the
representations and

                                       30
<PAGE>

warranties of such Transferring Entity contained in this Agreement and
applicable to such Closing shall be true as though such representations and
warranties were made on and as of such date. Each Transferring Entity shall
cooperate with CCIC and TowerCo and use their commercially reasonable efforts to
cause all of the conditions to the obligations of the parties under this
Agreement to be satisfied on or prior to each Closing Date.

     (c) With respect to any net additions of antennas since July 1, 1999 on
a Tower which is included in a Closing, Sections 5(b) and 5(c) of the Sublease
shall be applicable.

   9.2  CONDUCT OF BUSINESS BY CCIC AND TOWERCO.  Each of CCIC and TowerCo
covenants and agrees that pending each Closing, except as otherwise agreed to in
writing by BSPCI, and except in connection with the performance of the
transactions contemplated hereby:

     (a) Each of CCIC and TowerCo shall promptly disclose to BSPCI any material
information contained in its representations and warranties or any of the
Schedules hereto which, because of an event occurring after the date hereof, is
incomplete or is no longer correct as of all times after the date hereof until
the Closing Date with respect to which such representations and warranties are
made; provided, however, that none of such disclosures shall be deemed to
modify, amend or supplement the representations and warranties of CCIC and
TowerCo or the Schedules hereto for the purposes of ARTICLES 7 and 8, unless
BSPCI shall have consented thereto in writing.

     (b) Each of CCIC and TowerCo shall use its commercially reasonable efforts
to conduct its business in such a manner that on each Closing Date the
representations and warranties of CCIC and TowerCo contained in this Agreement
and applicable to such Closing shall be true as though such representations and
warranties were made on and as of such date.  Each of CCIC and TowerCo shall
cooperate with BSPCI and use its commercially reasonable efforts to cause all of
the conditions to the obligations of the parties under this Agreement to be
satisfied on or prior to each Closing Date.

     (c) Each of CCIC and TowerCo shall provide to BSPCI's officers, employees,
counsel, accountants and other representatives free and full access to and the
right to inspect, during normal business hours, all of the records, contracts
and other documents relating to its business, provided that such inspection
shall not unreasonably interfere with the business operations of CCIC and
TowerCo.  Each of CCIC and TowerCo shall furnish to BSPCI all such documents and
copies of documents and records and information with respect to the affairs of
its business and copies of any working papers relating thereto as BSPCI shall
from time to time reasonably request from time to time.  Notwithstanding the
foregoing, nether CCIC nor TowerCo shall be required to provide any such
information to BSPCI if, in the reasonable determination of CCIC or TowerCo, or
their respective counsel, as applicable, access to such information by BSPCI is
prohibited by the provisions of any confidentiality agreement to which either of
CCIC or TowerCo is a party or by applicable Law.

                                       31
<PAGE>

                                   ARTICLE 10
               CONDITIONS TO OBLIGATIONS OF TRANSFERRING ENTITIES

     All obligations of the Transferring Entities hereunder are subject to the
fulfillment and satisfaction, prior to or at each Closing, of each and every one
of the following conditions, any or all of which may be waived in whole or in
part by BSPCI, provided that no such waiver will be effective unless it is set
forth in a writing executed by BSPCI as of such Closing Date:

     10.1 REPRESENTATIONS AND WARRANTIES.  The representations and warranties
of CCIC and TowerCo contained in this Agreement or in any schedule, certificate
or document delivered by CCIC and TowerCo to BSPCI pursuant to the provision
hereof shall have been true and correct in all material respects on and as of
the date when made and shall be deemed to be made again at and as of the date of
each Closing and shall be true and correct in all material respects at and as of
such time.

     10.2 COMPLIANCE WITH AGREEMENTS AND CONDITIONS.  Each of CCIC and TowerCo
shall have performed and complied in all material respects with all covenants,
agreements and conditions required by this Agreement to be performed or complied
with by each of them prior to or on the date of each Closing, and no unwaived
event of default shall have occurred and be continuing under SECTION 31(D) of
the Sublease that would give BSPCI the right to terminate the Sublease as to all
Sites.

     10.3 CLOSING CERTIFICATES.  Each of the Transferring Entities shall have
received from each of CCIC and TowerCo certificates dated the date of each
Closing, in each case certifying in such detail as BSPCI may reasonably request
as to the fulfillment and satisfaction of the conditions specified in SECTIONS
10.1 and 10.2 and, in the case of the certificate for the Initial Closing only,
the absence of any material adverse change in the businesses or assets of CCIC
or TowerCo since March 5, 1999.

     10.4 CORPORATE CONSENTS.  Each of the Transferring Entities shall have
received from each of CCIC and TowerCo, at the Initial Closing, minutes of the
meetings of its Board of Directors or a consent action taken by such Board of
Directors in lieu of a meeting, in each case, certified by its Secretary, an
Assistant Secretary or another of its authorized officers, (a) authorizing and
approving the execution and delivery of this Agreement and other Transaction
Documents on behalf of CCIC and TowerCo and the consummation of the transactions
contemplated herein and therein, and (b) authorizing and approving all other
necessary and proper actions to enable CCIC and TowerCo to comply with the terms
hereof and thereof.

     10.5 CONSENTS AND APPROVALS.  Each of the Transferring Entities shall
have obtained authorizations, consents and approvals from any Person whose
authorization, consent or approval is required or necessary to consummate the
transactions contemplated herein, including (a) if applicable, the consents and
approval of any environmental agency having jurisdiction over the transactions
contemplated hereby within the Territory and applicable to such Closing shall

                                       32
<PAGE>

have been obtained, (b) the consents specified in the Disclosure Schedule
pursuant to SECTION 6.3 and applicable to such Closing shall have been obtained
or waived, (c) any consents specified in the Disclosure Schedule and applicable
to such Closing shall have been obtained or waived, (d) any consents of any
limited partners of the Carolinas Partnership applicable to particular Sites
shall have been obtained and (e) all Governmental Permits applicable to such
Closing, shall have been obtained or waived.

     10.6  NO LITIGATION.   No Action shall have been instituted, be threatened
in writing or be pending, in each case by any Government or other Person (a)
against CCIC or TowerCo to restrain or prohibit the consummation of the
transactions contemplated in this Agreement, and (b) which could reasonably be
expected to have a material adverse effect on the business, assets, properties,
Liabilities, affairs, results of operations, prospects, conditions (financial or
otherwise), or cash flow of CCIC and TowerCo.

     10.7 FUNDAMENTAL TRANSACTIONS.   Neither TowerCo nor CCIC shall have (a)
been a party to any merger, consolidation or business combination in which
TowerCo or CCIC was not the surviving corporation, (b) been liquidated, wound-up
or dissolved, or (c) sold, transferred or disposed of all or substantially all
of its properties and assets.

     10.8 BUILD-TO-SUIT AGREEMENT.  At the Initial Closing Date, CCIC and
TowerCo shall have executed and delivered to the Build-to-Suit Agreement, and
the same shall have become effective as of the Initial Closing Date.

     10.9 SUBLEASE.  At the Initial Closing Date, CCIC and TowerCo shall
have executed and delivered to BSPCI, the Sublease and the Sublease shall have
become effective as of the Initial Closing Date.

     10.10  SITE MAINTENANCE AGREEMENT.  On or prior to the Initial Closing,
CCIC and TowerCo shall have executed and delivered to BSPCI the Site Maintenance
Agreement, and the same shall have become effective as of the date of the
Initial Closing.

     10.11  AMENDMENT TO SITE MARKETING AGREEMENT.  On or prior to the Initial
Closing Date, CCIC shall have executed and delivered the Amendment to Site
Marketing Agreement and the same shall have become effective on or before the
Initial Closing Date and shall terminate on the Final Closing Date.

                                       33
<PAGE>

                                   ARTICLE 11
                 CONDITIONS TO OBLIGATIONS OF CCIC AND TOWERCO

     All obligations of CCIC and TowerCo hereunder in respect of any Existing
Site included in any Closing are subject to the fulfillment and satisfaction,
prior to or at such Closing, of each and every one of the following conditions,
to the extent such condition relates to such Existing Site, any or all of which
may be waived in whole or in part by TowerCo, provided that no such waiver will
be effective unless it is set forth in a writing executed by TowerCo:

     11.1 REPRESENTATIONS AND WARRANTIES.  The representations and warranties
of each of the Transferring Entities whose Sites are included in such Closing
("APPLICABLE TRANSFERRING ENTITIES") contained in this Agreement or in any
schedule, certificate or document delivered by such Transferring Entities to
TowerCo pursuant to the provision hereof shall have been true and correct in all
material respects on and as of the date when made and shall be deemed to be made
again at and as of the date of each Closing and shall be true and correct in all
material respects at and as of such time.  For purposes of determining under
SECTION 11.1 whether a condition to a Closing has been satisfied, and not for
any other purposes, the representations and warranties made shall be deemed
made, unless otherwise specifically provided, without the qualification set
forth therein that such representations and warranties are made subject to the
Applicable Transferring Entity's best knowledge.

     11.2 COMPLIANCE WITH AGREEMENTS AND CONDITIONS.  Each of the Applicable
Transferring Entities shall have performed and complied in all material respects
with all covenants, agreements and conditions required by this Agreement to be
performed or complied with by each of them prior to or on the date of each
Closing.

     11.3 CLOSING CERTIFICATES.  TowerCo shall have received from each
Applicable Transferring Entity a certificate dated the date of each Closing, (a)
certifying in such detail as TowerCo may reasonably request as to (i) the
fulfillment and satisfaction of the conditions specified in SECTIONS 11.1 and
11.2 and (ii) no event or circumstance having had a Material Adverse Effect on
the Sites of such Transferring Entity included in such Closing has occurred
since July 1, 1999, and (b) setting forth any net additions of microwave dishes
or antenna arrays with more than nine (9) antennas, on each Tower included in
such Closing since the date hereof.

     11.4 CORPORATE CONSENTS.  On or before each Closing, TowerCo shall have
received (a) from BSPCI, minutes of the meeting of its Board of Directors or a
consent action taken by such Board of Directors in lieu of a meeting (or, in
either case, appropriate committee thereof), in each case, certified by its
Secretary, an Assistant Secretary or another of its authorized officers, and (b)
from the Carolinas Partnership, minutes of the meetings of its Executive
Committee, certified by the Secretary or an Assistant Secretary of BSPCI, as its
sole general partner, (i) authorizing and approving the execution and delivery
of this Agreement and other Transaction Documents on behalf of such Transferring
Entity and the consummation of the transactions

                                       34
<PAGE>

contemplated herein and therein, and (ii) authorizing and approving all other
necessary and proper actions to enable such Transferring Entity to comply with
the terms hereof and thereof.

     11.5 CONSENTS AND APPROVALS.  All necessary consents and approvals shall
have been obtained from any Government or other Person, whose consent or
approval is required or necessary to consummate the transactions contemplated
herein, including the following:  (a) if applicable, the consents and approval
of any environmental agency having jurisdiction over the transactions
contemplated hereby within the Territory and applicable to such Closing, shall
have been obtained, (b) the consents specified in the Disclosure Schedule and
applicable to such Closing shall have been obtained or waived, and (c) all
Governmental Permits applicable to such Closing shall have been obtained or
waived.

     11.6  NO LITIGATION.  No Action shall have been instituted, be threatened
in writing or be pending, in each case by any Government or other Person, (a)
against the Applicable Transferring Entity to restrain or prohibit its
consummation of the transactions in this Agreement, and (b) which could
reasonably be expected to have a material adverse effect on the Transferred
Interests.

     11.7 BUILD-TO-SUIT AGREEMENT.  On or prior to the Initial Closing Date,
BSPCI shall have executed and delivered to CCIC and TowerCo, the Build-to-Suit
Agreement, and the same shall have become effective as of the Initial Closing
Date.

     11.8 SUBLEASE.  On or prior to the Initial Closing Date, BSPCI shall have
executed and delivered to CCIC and TowerCo the Sublease, and the same shall have
become effective as of the Initial Closing Date.

     11.9 SITE MAINTENANCE AGREEMENT.  On or prior to the Initial Closing,
each Transferring Entity shall have executed and delivered to CCIC and TowerCo
the Site Maintenance Agreement and the same shall have become effective as of
the date of such Closing.

     11.10  AMENDMENT TO SITE MARKETING AGREEMENT.  On or prior to the Initial
Closing Date, BSPCI shall have executed and delivered the Amendment to Site
Marketing Agreement, and the same shall have become effective on or before the
Initial Closing Date.

                                       35
<PAGE>

                                  ARTICLE 12
                                INDEMNIFICATION

     12.1  INDEMNIFICATION BY TRANSFERRING ENTITY.  (a)  As to each Included
Site, from and after the Closing Date of such Site, each Transferring Entity,
severally and not jointly, shall indemnify and hold harmless each of the TowerCo
Indemnitees from and against any and all Liabilities, claims, causes of action,
demands, judgments, losses, costs, damages or expenses whatsoever (including
reasonable attorneys' fees and disbursements of every kind, nature and
description) incurred by such TowerCo Indemnitee in connection therewith
(collectively, "TOWERCO INDEMNIFIED LOSSES") that such TowerCo Indemnitee may
sustain, suffer or incur and that result from, arise out of or relate to (i) any
breach of any of the representations, warranties, covenants or agreements of
such Transferring Entity contained in this Agreement with respect to the
applicable Closing or (ii) such Transferring Entity's failure to perform any
obligations under any Existing Leases prior to the applicable Site Commencement
Date.

        (b) TowerCo acknowledges and agrees that no Transferring Entity shall
have any Liability under any provision of this Agreement for any TowerCo
Indemnified Losses to the extent that such TowerCo Indemnified Losses relate to
the negligence, willful misconduct or breach of any representation, warranty,
covenant or agreement of TowerCo contained in this Agreement or any Transaction
Document by TowerCo, CCIC or any other Person (other than the Transferring
Entities or their Affiliates) or their respective officers, agents, employees,
representatives, contractors, licensees, tenants or subtenants.

        (c) TowerCo shall take and shall cause its Affiliates to take all
reasonable steps to mitigate any TowerCo Indemnified Losses upon becoming aware
of any event which would reasonably be expected to, or does give rise thereto,
including incurring costs only to the minimum extent necessary to remedy the
breach which gives rise to the TowerCo Indemnified Losses.

        (d) Nothing herein shall be deemed to limit or restrict in any manner
any rights or remedies which TowerCo has or may have, at law, in equity or
otherwise, against any Transferring Entity based on a willful misrepresentation
or willful breach of any covenant or agreement of such Transferring Entity
hereunder.

     12.2  INDEMNIFICATION BY CCIC.  (a)  From and after the Initial Closing,
CCIC shall indemnify and hold harmless each of the BSPCI Indemnitees from and
against any and all Liabilities, claims, causes of action, demands, judgments,
losses, costs, damages or expenses whatsoever (including reasonable attorneys'
fees and disbursements of every kind, nature and description) incurred by such
BSPCI Indemnitee in connection therewith (collectively, "BSPCI INDEMNIFIED
LOSSES") that such BSPCI Indemnitee may sustain, suffer or incur and that result
from, arise out of or relate to any breach of any of the representations,
warranties, covenants or agreements of CCIC contained in this Agreement with
respect to the applicable Closing.

                                       36
<PAGE>

        (b) Each Transferring Entity acknowledges and agrees that neither
TowerCo nor CCIC shall have any Liability under any provision of this Agreement
for BSPCI Indemnified Losses to the extent that such BSPCI Indemnified Losses
relate to the negligence, willful misconduct or breach of any representation,
warranty, covenant or agreement of such Transferring Entity contained in this
Agreement or any Transaction Document by such Transferring Entity, or any other
Person (other than CCIC, TowerCo or their Affiliates) or their respective
officers, agents, employees, representatives, contractors, licensees, tenants or
subtenants.

        (c) Each Transferring Entity shall take all reasonable steps to mitigate
any BSPCI Indemnified Losses upon becoming aware of any event which would
reasonably be expected to, or does give rise thereto, including incurring costs
only to the minimum extent necessary to remedy the breach which gives rise to
the BSPCI Indemnified Losses.

        (d) Nothing herein shall be deemed to limit or restrict in any manner
any rights or remedies which any Transferring Entity has or may have, at law, in
equity or otherwise, against CCIC based on a willful misrepresentation or
willful breach of any covenants or agreements of CCIC hereunder.

     12.3  INDEMNIFICATION BY TOWERCO.  (a)  From and after the Initial
Closing, TowerCo shall indemnify and hold harmless each BSPCI Indemnitee from
and against any BSPCI Indemnified Losses that such BSPCI Indemnitee may sustain,
suffer or incur and that result from, arise out of or relate to (i) any breach
of any of the representations, warranties, covenants or agreements of TowerCo
contained in this Agreement with respect to the applicable Closing or (ii)
TowerCo's failure to perform any obligations under any Existing Leases after the
applicable Site Commencement Date.

        (b) Each Transferring Entity shall take and cause its Affiliates to take
all reasonable steps to mitigate any BSPCI Indemnified Losses upon becoming
aware of any event which would reasonably be expected to, or does give rise
thereto, including incurring costs only to the minimum extent necessary to
remedy the breach which gives rise to the BSPCI Indemnified Losses.

        (c) Nothing herein shall be deemed to limit or restrict in any manner
any rights or remedies which a BSPCI Indemnitee has or may have, at law, in
equity or otherwise, against TowerCo based on a willful misrepresentation or
willful breach of any covenant or agreement by TowerCo hereunder.

     12.4  PROCEDURE FOR CLAIMS.  Any Person obligated to pay or reimburse any
Indemnified Losses hereunder (whether one or more, an "INDEMNIFYING PARTY")
shall, subject to the provisions of SECTION 12.5, reimburse the party entitled
to recover the Indemnified Losses, as the case may be (whether one or more, an
"INDEMNIFIED PARTY"), within ten days of written demand on the Indemnifying
Party therefor. If the Indemnifying Party objects to any claim made by an

                                       37
<PAGE>

Indemnified Party hereunder and the Indemnified Party initiates legal action
with respect thereto, the Indemnifying Party agrees, to the extent it can do so,
to join all affected parties in such action so that the rights and liabilities
of the parties under this Agreement with respect to such claim may be resolved
in one action.

     12.5  DEFENSE OF CLAIMS.  (a) If any Action arises after the date hereof
for which an Indemnifying Party may be liable under the terms of this Agreement,
then the Indemnified Party shall notify the Indemnifying Party within a
reasonable time after such Action arises and is known to the Indemnified Party,
and shall give the Indemnifying Party a reasonable opportunity:  (i) to conduct
any proceedings or negotiations in connection therewith and necessary or
appropriate to defend the Indemnified Party; (ii) to take all other required
steps or proceedings to settle or defend any such Action; and (iii) to employ
counsel to contest any such Action in the name of the Indemnified Party or
otherwise.

        (b)  The expenses of all proceedings, contests or lawsuits with respect
to such Actions shall be borne by the Indemnifying Party. If the Indemnifying
Party wishes to assume the defense of such Action, then the Indemnifying Party
shall give written notice to the Indemnified Party within thirty (30) days after
notice from the Indemnified Party of such Action (unless the Action reasonably
requires a response in less than thirty (30) days after the notice is given to
the Indemnifying Party, in which event the Indemnifying Party shall notify the
Indemnified Party at least ten days prior to such reasonably required response
date), and the Indemnifying Party shall thereafter assume the defense of any
such Action, through counsel reasonably satisfactory to the Indemnified Party;
provided, that the Indemnified Party may participate in such defense at its own
expense.  The Indemnified Party shall have the right to control the defense of
the Action unless and until the Indemnifying Party shall assume the defense of
such Action.

        (c)  If the Indemnifying Party does not assume the defense of, or if
after so assuming the Indemnifying Party fails to defend, any such Action, then
the Indemnified Party may defend against such Action in such manner as such
Indemnified Party may deem appropriate (provided, that the Indemnifying Party
may participate in such defense at its own expense); provided, however, that the
Indemnified Party may not settle such Action without the Indemnifying Party's
prior written consent, and the Indemnifying Party shall promptly reimburse the
Indemnified Party for the amount of all expenses, legal and otherwise,
reasonably and necessarily incurred by the Indemnified Party in connection with
the defense against and settlement of such Action.  If no settlement of such
Action is made, the Indemnifying Party shall satisfy any judgment rendered in
such Action, before the Indemnified Party is required to do so, and pay all
expenses, legal or otherwise, reasonably and necessarily incurred by the
Indemnified Party in the defense of such Action.

        (d)  If an Order is rendered against the Indemnified Party in any Action
covered by the indemnification hereunder, or any Lien in respect of such Order
attaches to any of the assets of the Indemnified Party, the Indemnifying Party
shall immediately upon such entry or attachment pay any amount required by such
Order in full or discharge such Lien unless, at the expense and request

                                       38
<PAGE>

of the Indemnifying Party, an appeal is taken under which the execution of the
Order or satisfaction of the Lien is stayed. If and when a final Order is
rendered in any such Action, the Indemnifying Party shall forthwith pay any
amount required by such Order or discharge such Lien before the Indemnified
Party is compelled to do so.

     12.6  CERTAIN LIMITATIONS.  (a) Nothing in this Agreement shall be deemed
to require any Transferring Entity to indemnify any TowerCo Indemnitee for or in
respect of any of the Real Estate Representations.  Without limiting the
generality of the foregoing, the sole remedies of TowerCo or CCIC in respect of
a breach of any Real Estate Representation by any Transferring Entity shall be
to cause (i) such Transferring Entity to continue to use reasonable efforts to
cure such breach, as contemplated by SECTION 4.6, until the Final Closing Date,
or (ii) the Site as to which such Real Estate Representation is breached to be a
Maintained Site (or, at the applicable Transferring Entity's election, an
Excluded Site) or to defer the Closing of such Site to a later Closing Date,
provided that the failure of any such deferred Site to become an Included Site
or Maintained Site on or prior to the Final Closing shall not constitute a
default under this Agreement or give CCIC or TowerCo any remedy.

        (b)  Notwithstanding anything to the contrary contained herein, no
Transferring Entity shall have any obligation under this SECTION 12 to TowerCo
Indemnitees with respect to the breach of representations, warranties, covenants
or agreements by BSPCI, unless, until and only to the extent that the aggregate
of all TowerCo Indemnified Losses from all such breaches exceeds on a cumulative
basis $10,000,000 (the "DEDUCTIBLE AMOUNT"), and then only to the extent of such
excess amount.

        (c)  Anything in this Agreement to the contrary notwithstanding, in no
event shall any Transferring Entity be liable under this Agreement for any
indemnification obligation pursuant to this SECTION 12 in excess of the
aggregate amount of the Cash Consideration having been paid to such Transferring
Entity as of the date on which the claim for indemnification arose (the "MAXIMUM
INDEMNIFICATION").

     12.7  LIMITATION ON LIABILITY.  In no event shall any party hereto or its
respective Affiliates be liable to the other parties for any special, incidental
or consequential damages suffered or incurred by such other parties to this
Agreement or any third parties and caused by or arising out of any breach of any
representation, warranty, covenant or agreement contained in this Agreement.

     12.8 SURVIVAL.  The representations and warranties of the parties
contained in this Agreement shall survive any investigation before or after the
date of this Agreement made by the other parties and the consummation of the
transactions contemplated by this Agreement and shall continue in full force and
effect for the periods specified below ("SURVIVAL PERIOD"):

                                       39
<PAGE>

          (a) no representations and warranties of a Transferring Entity
     relating to real estate matters, including without limitation SECTIONS 3.5
     and 6.6 through 6.13, shall survive the Closing; and

          (b) all other representations and warranties in this Agreement shall
     be of no further force and effect after the first anniversary of the date
     hereof.

Anything to the contrary notwithstanding, the Survival Period shall be extended
automatically to include any time period necessary to resolve a claim for
indemnification which was made before expiration of the Survival Period, but not
resolved prior to its expiration, and any such extension shall apply only as to
the claims asserted and not so resolved within the Survival Period.  Liability
for any such item shall continue until such claim shall have been finally
settled, decided or adjudicated.

                                  ARTICLE 13
                                  TERMINATION

     13.1 TERMINATION FOR CERTAIN CAUSES BY BSPCI.  (a) This Agreement may be
terminated at any time prior to the Final Closing by BSPCI upon written notice
to TowerCo, upon the occurrence of one or more of the following events,
effective as of the date designated by BSPCI in its notice of termination:

          (i) If any of the conditions set forth in ARTICLE 10 have not been
     satisfied, performed or waived in writing on or as of any applicable
     Closing Date;

          (ii) If any representation or warranty of CCIC or TowerCo set forth in
     ARTICLE 7 or 8 shall prove to be untrue or incorrect in any material
     respect;

          (iii)  If CCIC's or TowerCo's failure to comply with conditions
     hereunder constitute (A) a breach of representation or warranty by CCIC
     TowerCo or either of them in any material respect, (B) a failure by CCIC or
     TowerCo to perform any of the terms, covenants, conditions, agreements,
     requirements, restrictions or provisions of this Agreement in any material
     respect, or (C) a default by CCIC or TowerCo; or

          (iv) If CCIC or TowerCo fail to keep, observe, perform, satisfy or
     comply with, fully and completely, in any material respect, any of the
     terms, covenants, conditions, agreements, requirements, restrictions or
     provisions required by this Agreement to be kept, observed, performed,
     satisfied or complied with by CCIC or TowerCo.

                                       40
<PAGE>

          (v) If an unwaived event of default shall have occurred and be
     continuing under Section 31(d) of the Sublease that would give BSPCI the
     right to terminate the Sublease as to all Sites;

provided; however that for the events listed in clauses (i) through (iv) above
occurring after the Initial Closing, BSPCI shall have the right to terminate
this Agreement only if such event or events shall have or would have a
substantial likelihood of preventing or delaying a Closing (it being understood
that such prevention or delay may be caused by BSPCI's exercise of its other
rights under this Agreement in its reasonable discretion), such termination to
be effective after notice to TowerCo and an opportunity for TowerCo to cure all
such events within (A) ninety (90) days of such notice, in the case of a failure
of a condition described in SECTION 10.6(A) and (B) twenty (20) days of such
notice, in all other cases.

     (b) If this Agreement is terminated by BSPCI pursuant to SECTION 13.1(A),
then BSPCI shall be entitled to and CCIC shall pay BSPCI, within five (5)
business days following the date of such termination, a termination fee in the
amount of $20,000,000 (the "TERMINATION FEE").  Upon any such termination, all
Transaction Documents between the parties shall be terminated (including the
Site Marketing Agreement to the extent applicable to the Sites only), and, at
the option of BSPCI, all prior Closings shall be rescinded.  If released to
BSPCI, the Escrow Fund shall be applied toward CCIC's obligation to pay the
Termination Fee.  If BSPCI exercises its option to rescind the prior Closings,
payment of the Termination Fee shall be made by netting it against the amounts
previously paid to Transferring Entities at the previous Closings, and BSPCI
shall pay to CCIC any amounts paid to Transferring Entities at the prior
Closings which are in excess of the Termination Fee.

     13.2 TERMINATION FOR PASSAGE OF TIME.  This Agreement may be terminated
by either party (a) if the Initial Closing shall not have occurred on or before
September 30, 1999 or (ii) if the conditions to Closing contained in ARTICLES 10
and 11 shall not have been satisfied or waived in writing on or before December
31, 1999.  Upon any such termination, no party shall have any further rights,
Liabilities or obligations hereunder.

     13.3 TOWERCO'S REMEDIES.  (a) Notwithstanding anything to the contrary
contained herein, if the parties fail to consummate any Closing contemplated by
the Closing Schedule as a result of BSPCI's failure to keep, observe, perform,
satisfy or comply with, fully and completely, any of the terms, covenants,
conditions, agreements, requirements, restrictions or provisions required by
this Agreement to be kept, observed, performed, satisfied or complied with by
BSPCI, then TowerCo may exercise such all such rights and remedies as may be
provided for or allowed by law or in equity.  Except as expressly set forth in
the Transaction Documents, CCIC may, in addition to any other remedies that may
be available at law or in equity, bring an action for specific performance,
including attorneys' fees and costs of suit.

          (b) Each Transferring Entity hereby acknowledges and agrees that in
the event of such Transferring Entity's default hereunder, TowerCo shall be
entitled to, without limitation, (i)

                                       41
<PAGE>

an Action for specific performance against such Transferring Entity and (b) the
right to seek, prove and recover direct damages from such Transferring Entity
incurred by TowerCo in connection with such Action, including, without
limitation, court costs and attorneys' fees in connection with such Action.

                                   ARTICLE 14
                               GENERAL PROVISIONS

     14.1 NOTICES. All notices or other communications required or permitted
to be given or made hereunder shall be in writing and delivered personally or
sent by nationally recognized overnight courier (such as Federal Express) on an
overnight basis or pre-paid, first class certified or registered mail, return
receipt requested, or by facsimile transmission, to the intended recipient
thereof at its address or facsimile number set out below.  Any such notice or
communication shall be deemed to have been duly given immediately (if given or
made in person, or by facsimile confirmed by mailing a copy thereof to the
recipient in accordance with this SECTION 14.1 on the date of such facsimile),
one day after pickup in the case of delivery by overnight courier, or two days
after mailing (if given or made by mail), and in proving same it shall be
sufficient to show that the envelope containing the same was delivered to the
delivery service and duly addressed, or that receipt of a facsimile was
confirmed by the recipient as provided above.  The addresses and facsimile
numbers of the parties for purposes of this Agreement are:
<TABLE>
<CAPTION>

If to TowerCo:                              If to BSPCI:
<S>                                         <C>
Crown Castle South Inc.                     BellSouth Personal Communications, Inc.
375 Southpointe Blvd.                       1100 Peachtree Street, NE, Suite 910
Cannonsburg, PA  15317                      Atlanta, GA  30309
Facsimile No.: (724) 416-2468               Facsimile No.:  (404) 249-0922
Attention: General Counsel                  Attention.:  Thomas M. Meiss, Esq.

with a copy to:                             with a copy to:

Sittig, Cortese & Wratcher                  BellSouth Corporation.
1515 Frick Building                         1155 Peachtree Street, NE, 18th Floor
Pittsburgh, PA 15219                        Atlanta, GA  30309
Facsimile No.: (412) 402-4011               Facsimile No.:  (404) 249-2629
Attention: William R. Sittig, Jr.           Attention:  E. John Whelchel, Esq.
</TABLE>

                                       42
<PAGE>

<TABLE>
<CAPTION>

If to CCIC:                                 If to the Carolinas Partnership:
<S>                                         <C>
Crown Castle International Corp.            BellSouth Carolinas PCS, L.P.
510 Bering Drive, Suite 500                 c/o  BellSouth Personal Communications, Inc.
Houston, Texas  77057                       1100 Peachtree Street, NE, Suite 910
Facsimile No:  (713) 570-3150               Atlanta, GA  30309
Attention: Chief Executive Officer          Facsimile No.:  (404) 249-0922
           General Counsel                  Attention:  Thomas M. Meiss, Esq.

with a copy to:                             with a copy to:

Cravath, Swaine & Moore                     BellSouth Corporation
825 Eighth Avenue, Worldwide Plaza          1155 Peachtree Street, NE, 18th Floor
New York, New York  10019-7475              Atlanta, GA  30309
Facsimile No.:  (212) 474-3700              Facsimile No.:  (404) 249-2629
Attention:  Stephen L. Burns                Attention:  E. John Whelchel, Esq.
</TABLE>

        (b) Either party may change the address to which notices or other
communications to such party shall be delivered or mailed by giving notice
thereof to the other party hereto in the manner provided herein.

     14.2  FACSIMILE AS WRITING.  The parties expressly acknowledge and agree
that, notwithstanding any statutory or decisional law to the contrary, the
printed product of a facsimile transmittal shall be deemed to be "written" and a
"writing" for all purposes of this Agreement.

     14.3  NO ASSIGNMENT; BINDING EFFECT.  Each Transferring Entity may assign,
delegate or otherwise transfer any of their rights or obligations under this
Agreement, in whole or in part, without the written consent of Crown or TowerCo,
to any BSPCI Affiliate it being understood that upon such assignment, such
Transferring Entity will not be released from its obligations hereunder. Neither
Crown nor TowerCo may assign, delegate or otherwise transfer any of their rights
or obligations under this Agreement, in whole or in part, without the written
consent of the other parties. This Agreement shall be binding upon and will
inure to the benefit of the parties hereto and their respective permitted
successors and assigns. A Person may become a Transferring Entity hereunder and
a party hereto or to any Transaction Document by executing and delivering to
CCIC a Site Designation Supplement or other written instrument reasonably
acceptable to CCIC, setting forth its agreement to be bound by the terms hereof
or thereof, whereupon such Person shall be a party hereto or thereto.

     14.4  HEADINGS.  The headings of particular provisions of this Agreement
are inserted for convenience only and are not to be construed as a part of this
Agreement or serve as a limitation or expansion on the scope of any term or
provision of this Agreement.

                                       43
<PAGE>

     14.5  EXHIBITS AND SCHEDULES.  Each and every exhibit and schedule
referred to or otherwise mentioned in this Agreement is attached to this
Agreement and is and shall be construed to be made a part of this Agreement by
such reference or other mention at each point at which such reference or other
mention occurs, in the same manner and with the same effect as if each exhibit
and schedule were set forth in full and at length every time it is referred to
or otherwise mentioned.

     14.6  DEFINED TERMS.  Capitalized terms used in this Agreement shall have
the meanings ascribed to them at the point where first defined, irrespective of
where their use occurs, with the same effect as if the definitions of such terms
were set forth in full and at length every time such terms are used.

     14.7  ARBITRATION.  (a) Any and all disputes arising out of or in
connection with the negotiation, execution, interpretation, performance or
nonperformance of this Agreement (other than the payment of moneys) shall be
solely and finally settled by arbitration which shall be conducted in
Washington, D.C., in accordance with the Rules for Non-Administered Arbitration
of Business Disputes (the "RULES") as promulgated from time to time by the CPR
Institute for Dispute Resolution in New York, New York (the "CPR"), by a panel
of three arbitrators selected by the CPR in accordance with the Rules (the
"ARBITRATORS").  The Arbitrators shall be lawyers experienced in real estate and
corporate transactions in the tower industry and shall not have been employed by
or affiliated with any of the Parties or their Affiliates.  The Parties hereby
renounce all recourse to litigation and agree that the award of the Arbitrators
shall be final and subject to no judicial review; provided however, that neither
the provisions of this SECTION 14.7 nor the recourse to arbitration, shall
prejudice the right of any Party to apply to any court of ordinary jurisdiction
for the request of temporary or permanent injunctive or similar judicial relief.
A written transcript shall be kept of all proceedings.  The Arbitrators shall
decide the issues submitted to them, in writing, stating the reasons for their
decision, in accordance with:  (i) the provisions and purposes of this
Agreement; and (ii) the laws of the State of Georgia (without regard to its
conflicts of laws rules).  Unless the parties otherwise agree in writing, the
arbitrators shall render their decision within sixty (60) days.

          (b) The parties agree to facilitate the arbitration by:  (i) making
available to one another and to the Arbitrators for examination, inspection and
extraction all documents, books, records and personnel under their control if
determined by the Arbitrators to be relevant to the dispute; (ii) conducting
arbitration hearings to the greatest extent possible on successive days; and
(iii) observing strictly the time periods established by the Rules or by the
Arbitrators for submission of evidence or briefs.

     (c) Judgment on the award of the Arbitrators may be entered in any court
having jurisdiction over the Party against which enforcement of the award is
being sought.  The Arbitrators are expressly authorized to enter orders of
interim or provisional relief each of which may be enforced as a final award.
The Arbitrators shall divide all costs (other than fees of

                                       44
<PAGE>

counsel) incurred in conducting the arbitration in their final award in
accordance with what they deem just and equitable under the circumstances.

     14.8  PARTIAL INVALIDITY AND SEVERABILITY.  All rights and restrictions
contained herein may be exercised and are applicable and binding only to the
extent that they do not violate any applicable Laws and are intended to be
limited to the extent necessary to render this Agreement legal, valid and
enforceable.  If any term of this Agreement, or part thereof, not essential to
the commercial purpose of this Agreement is held to be illegal, invalid or
unenforceable by a Forum of competent jurisdiction, it is the intention of the
parties that the remaining terms hereof, or part thereof, constitute their
agreement with respect to the subject matter hereof and all such remaining
terms, or parts thereof, remain in full force and effect.  To the extent legally
permissible, any illegal, invalid or unenforceable provision of this Agreement
will be replaced by a valid provision which will implement the commercial
purpose of the illegal, invalid or unenforceable provision.

     14.9 WAIVER.  Any term or condition of this Agreement may be waived at
any time by the party which is entitled to the benefit thereof, but only if such
waiver is evidenced by a writing signed by such party.  No failure on the part
of any party hereto to exercise, and no delay in exercising any right, power or
remedy created hereunder, will operate as a waiver thereof, nor will any single
or partial exercise of any right, power or remedy by either party preclude any
other or further exercise thereof or the exercise of any other right, power or
remedy.  No waiver by either party hereto of any breach of or default in any
term or condition of this Agreement will constitute a waiver of or assent to any
succeeding breach of or default in the same or any other term or condition
hereof.

     14.10  RIGHTS CUMULATIVE.  All rights, remedies, powers and privileges
conferred under this Agreement on the parties shall be cumulative of and in
addition to, but not restrictive of or in lieu of, those conferred by law.

     14.11  TIME OF ESSENCE; DATES.  Time is of the essence of this Agreement.
Anywhere a day certain is stated for payment or for performance of any
obligation, the day certain so stated enters into and becomes a part of the
consideration for this Agreement.  If any date set forth in this Agreement shall
fall on, or any time period set forth in this Agreement shall expire on, a day
which is a Saturday, Sunday, federal or state holiday, or other non-business
day, such date shall automatically be extended to, and the expiration of such
time period shall automatically to be extended to, the next day which is not a
Saturday, Sunday, federal or state holiday or other non-business day. The final
day of any time period under this Agreement or any deadline under this Agreement
shall be the specified day or date, and shall include the period of time through
and including such specified day or date. All references to the "EFFECTIVE DATE"
shall be deemed to refer to the later of the date of TowerCo's or BSPCI's
execution of this Agreement, as indicated below their executions hereon.

                                       45
<PAGE>

     14.12  GOVERNING LAW.  The validity and effect of this Agreement shall be
governed by, construed under and interpreted and enforced in accordance with the
laws of the State of Georgia, without regard to its conflicts of laws rules.

     14.13  COUNTERPARTS.  This Agreement may be executed in several
counterparts, each of which shall be deemed an original, and all of such
counterparts together shall constitute one and the same instrument.

     14.14  ATTORNEYS' FEES.  In the event of any litigation between the
parties arising under or in connection with this Agreement, the prevailing party
shall be entitled to recover from the other party the expenses of litigation
(including reasonable attorneys' fees, expenses and disbursements) incurred by
the prevailing party.

     14.15  AUTHORITY.  Each party hereto warrants and represents that such
party has full and complete authority to enter into this Agreement and each
person executing this Agreement on behalf of a party warrants and represents
that he has been fully authorized to execute this Agreement on behalf of such
party and that such party is bound by the signature of such representative.

     14.16  COUNSEL.  Each party hereto warrants and represents that each
party has been afforded the opportunity to be represented by counsel of its
choice in connection with the execution of this Agreement and has had ample
opportunity to read, review, and understand the provisions of this Agreement.

     14.17  NUMBER AND GENDER.  Where the context requires, the use of the
singular form herein includes the plural, the use of the plural includes the
singular, and the use of any gender includes any and all genders.

     14.18  NO CONSTRUCTION AGAINST PREPARER.  No provision of this
Agreement shall be construed against or interpreted to the disadvantage of any
party by any court or other governmental or judicial authority by reason of such
party's having or being deemed to have prepared or imposed such provision.

     14.19  ENTIRE AGREEMENT; MODIFICATION.  This Agreement supersedes all
prior discussions and agreements between the parties with respect to the subject
matter hereof, and this Agreement contains the sole and entire agreement between
the parties with respect to the matters covered hereby.  This Agreement will not
be altered or amended except by an instrument in writing signed by or on behalf
of the party entitled to the benefit of the provision against whom enforcement
is sought.

     14.20  POWER OF ATTORNEY.  (a) The Carolinas Partnership hereby
irrevocably constitutes and appoints BSPCI as its agent to modify, amend or
otherwise change the Agreement to Sublease, any other Transaction Documents or
any of their respective terms or provisions

                                       46
<PAGE>

(including modifications, amendments or changes subsequent to any Closing), to
take all actions and to execute all documents necessary or desirable to
consummate the transactions contemplated by the Agreement to Sublease, and to
take all actions and to execute all documents which may be necessary or
desirable in connection therewith, to give and receive consents and all notices
hereunder, to negotiate and settle claims for indemnification thereunder and to
perform any other act arising under or pertaining to the Transaction Documents
and the transactions contemplated thereby. The Carolinas Partnership agrees that
service of process upon BSPCI in any action or proceeding arising under or
pertaining to the Transaction Documents shall be deemed to be valid service of
process upon the Carolinas Partnership, and any claim by CCIC against the
Carolinas Partnership in respect to the Transaction Documents may be settled by
BSPCI. BSPCI shall be deemed to have accepted the appointment herein upon its
execution of this Agreement.

     (b) It is expressly understood and agreed that the foregoing power of
attorney and the agency created thereby is coupled with an interest of the
respective parties hereto and shall be binding on and enforceable against the
respective successors and assigns of the undersigned, and each of them, and said
power of attorney shall not be revoked or terminated in any event, including,
without limitation, the dissolution, bankruptcy or insolvency of any
Transferring Entity, shall continue to be binding and enforceable in the manner
provided herein and shall survive any and all Closings.

     (c) Nothing contained herein shall be deemed to make BSPCI liable to the
Carolinas Partnership because of service in its capacity as agent or otherwise.
In performing any of its duties under this letter agreement, BSPCI shall not
incur or be responsible for any liabilities, claims, causes of action, demands,
judgments, losses, costs, damages or expenses whatsoever ("Losses") to the
Carolinas Partnership, except for BSPCI's fraud, willful default or gross
negligence, and the Carolinas Partnership shall indemnify BSPCI against all
Losses.

     (d) Notwithstanding any other provision of this Agreement or any other
Transaction Document to the contrary, and notwithstanding any liability or
obligation that BSPCI would have as a general partner of the Carolinas
Partnership under this Agreement or any other Transaction Document (in each
case, whether or not expressly set forth in such Transaction Document), by
operation of law or otherwise, (i) BSPCI will have no personal liability for the
payment or performance of any obligation of the Carolinas Partnership under this
Agreement or any other Transaction Document (the "Obligations"), and (ii) CCIC
and TowerCo may proceed only against, and rely solely on, the Carolinas
Partnership for payment or performance of any of the Obligations, and shall not
sue or otherwise proceed against BSPCI, for or in respect of the Carolinas
Partnership's failure to pay or perform any Obligation.

                     [SIGNATURES APPEAR ON FOLLOWING PAGES]

                                       47
<PAGE>

     IN WITNESS WHEREOF, the Parties have caused this Agreement to Sublease to
be executed and sealed by their duly authorized representatives, all effective
as of the day and year first written above.

                                           TOWERCO:

                                           CROWN CASTLE SOUTH INC.


                                           By:______________________________
                                              Name:_________________________
                                              Title:________________________

                                           CCIC:

                                           CROWN CASTLE INTERNATIONAL CORP.


                                           By:______________________________
                                              Name:_________________________
                                              Title:________________________





                   [Signatures continued on following page]
<PAGE>

                  [Signatures continued from preceding page]




                                  BSPCI:

                                  BELLSOUTH PERSONAL COMMUNICATIONS,
                                   INC.

                                  By:__________________________________________
                                     Name:_____________________________________
                                     Title:____________________________________

                                  THE CAROLINAS PARTNERSHIP:

                                  BELLSOUTH CAROLINAS PCS, L.P.,

                                  By:  BellSouth Personal Communications, Inc.,
                                       its sole general partner:


                                  By:__________________________________________
                                     Name:_____________________________________
                                     Title:____________________________________

<PAGE>
                                                                     EXHIBIT 2.8

                                    SUBLEASE



                                  by and among



                    BELLSOUTH PERSONAL COMMUNICATIONS, INC.
                  ON ITS OWN BEHALF AND AS GENERAL PARTNER OF

                         BELLSOUTH CAROLINAS PCS, L.P.,


                       CROWN CASTLE INTERNATIONAL CORP.,


                                      and


                            CROWN CASTLE SOUTH INC.




                              Dated August 1, 1999

<PAGE>

                               TABLE OF CONTENTS

SECTION HEADING                                                      PAGE NO.
1.  Definitions                                                            1
2.  Sublease Documents                                                    12
3.  Subleased Property                                                    12
4.  Existing Subleases and Colocation Agreements                          16
5.  Reserved Space                                                        18
6.  Permitted Use                                                         19
7.  Access                                                                20
8.  Term                                                                  20
9.  Put Right                                                             21
10. Withdrawal                                                            22
11. Rent                                                                  23
12. Condition of the Sites                                                27
13. Work on the Site                                                      29
14. Damage to the Site, Tower or the Improvements                         32
15. Space Subtenants; Interference                                        33
16. Taxes and Assessments                                                 35
17. Utilities.                                                            35
18. Governmental Approvals                                                35
19. No Liens                                                              36
20. Condemnation                                                          37
21. Waiver of Subrogation; Indemnity                                      38
22. Subordination and Attornment                                          40
23. Environmental Covenants                                               40
24. Insurance                                                             43
25. Right of First Refusal                                                46
26. Assignment and Subletting                                             48
27. Estoppel Certificate                                                  50
28. Holding Over                                                          50
29. Rights and Inspection of Entry                                        50
30. A Party's Right to Act for the Other Party                            50
31. Defaults and Remedies                                                 52
32. Quiet Enjoyment                                                       56
33. No Merger                                                             56
34. Broker and Commission                                                 57
35. Recording of Site Designation Amendment                               57
36. Compliance with Specific FCC Regulations                              57
37. CCIC's and CCI's Guaranty                                             58
38. Several Liability                                                     60
39. General Provisions                                                    60
<PAGE>

                                    SUBLEASE

          THIS SUBLEASE is made and entered into this 1st day of August, 1999
(this "SUBLEASE"), by and among BELLSOUTH PERSONAL COMMUNICATIONS, INC. a
Delaware corporation ("BSPCI") for itself, and as general partner of BELLSOUTH
CAROLINAS PCS, L.P., a Delaware limited partnership (the "CAROLINAS
PARTNERSHIP"), CROWN CASTLE INTERNATIONAL CORP., a Delaware corporation
("CCIC"), and CROWN CASTLE SOUTH INC., a  wholly-owned subsidiary of CCIC and a
Delaware corporation ("TOWERCO").

          In consideration of the premises and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
Parties to this Sublease agree as follows:

          1.  DEFINITIONS.  For purposes of this Sublease, the following
capitalized terms have the following respective meanings:

          "AFFILIATE" of a Person means any Person which, whether directly or
indirectly, Controls, is Controlled by, or is under common Control with the
subject Party.

          "AGGREGATE RENT" has the meaning given to such term in SECTION 11(C).

          "AGGREGATE SITE MAINTENANCE CHARGE" has the meaning given to such term
in SECTION 11(C).

          "AGREEMENT TO SUBLEASE" means the Agreement to Sublease, by and among
CCIC, TowerCo, BSPCI and the Carolinas Partnership.

          "ALTERATIONS" means the construction or installation of new Towers
and/or Improvements on any Site or any part thereof, or the alteration,
replacement, modification or addition to the existing Improvements or Tower on a
Site.

          "AVAILABLE COLOCATION SPACE" has the meaning given to such term in
SECTION 4(B).

          "AVAILABLE SPACE" means, as to any Site, a Tower location, a portion
of the Land, a portion of the Improvements or any other portion, space or area
of such Site that is available for further sublease by TowerCo to any Space
Subtenant (including BSPCI, in such capacity) and all rights appurtenant to such
portion, space or area.

          "AWARD" means any amounts paid, recovered or recoverable as damages,
compensation or proceeds by reason of any taking on account of a Taking,
including all amounts paid pursuant to any agreement with such entity which has
been made in settlement or under threat of any such action or proceeding, less
the reasonable costs and expenses incurred in collecting such amounts.
<PAGE>

          "BELLSOUTH ENTITY" means BSPCI and/or the Carolinas Partnership, as
applicable.

          "BELLSOUTH ENTITY AFFILIATES" means, collectively, Affiliates of
BSPCI, Affiliates of the Carolinas Partnership, any limited partner of the
Carolinas Partnership and any Person in which BellSouth Corporation, a Georgia
corporation, owns, directly or indirectly, more than thirty percent (30%) of the
Voting Stock of such Person or which BellSouth Corporation otherwise Controls.

          "BELLSOUTH ENTITY COMPETITOR" means any Person whose revenues,
generated directly or indirectly, from providing wireline local exchange carrier
or wireless telephone provider telecommunications services, constitute at least
twenty percent (20%) of the total revenues of such Person.

          "BELLSOUTH ENTITY'S IMPROVEMENTS" means each of the following, in each
case located on the Land portion of the Reserved Space, installed by or for the
benefit of the applicable BellSouth Entity and used by such BellSouth Entity:
(i) Communications Equipment; (ii) (v) equipment shelters or cabinets, equipment
buildings, and other constructions, (w) generators and associated fuel tanks,
(x) grounding rings for equipment shelters or cabinets, (y) connections for
utilities service from the meter to the BellSouth Entity's Communications
Equipment, and (z) one or more foundations, concrete equipment pads or raised
platforms for such Communications Equipment, equipment shelters or cabinets,
buildings and constructions and (iii) as to any BTS Site, Constructed
Improvements (as defined in the Construction Agreement) on such BTS Site.

          "BELLSOUTH ENTITY INDEMNITEE" means BSPCI, the Carolinas Partnership,
their respective Affiliates, and the respective directors, officers, partners,
employees, contractors, subcontractors, advisors and consultants of BSPCI, the
Carolinas Partnership, and their respective Affiliates (except TowerCo and any
contractors, subcontractors, advisors and consultants of TowerCo).

          "BELLSOUTH ENTITY'S NOTICE" has the meaning given to such term in
SECTION 3(H).

          "BSPCI ENTITY WORK" has the meaning given to such term in SECTION
13(C).

          "BTS SITE" has the meaning given to such term in the Construction
Agreement.

          "BUSINESS DAY" means any week day on which the headquarters offices of
both CCIC and BSPCI are open for business.

          "CAPITAL STOCK" means:  (i) in the case of a corporation, corporate
stock; (ii) in the case of an association or business entity, any and all
shares, interests, participations, rights or other equivalents (however
designated) of corporate stock; (iii) in the case of a partnership or limited
liability company, partnership or membership interests (whether general or
limited); and (iv) any other interest or participation that confers on a Person
the right to receive a share of the profits and losses of, or distributions of
assets of, the issuing Person.

                                       2
<PAGE>

          "CASH FLOW" means, as to any Person, the earnings before interest
expense, depreciation, amortization and taxes of such Person and its
Subsidiaries on a consolidated basis, determined in accordance with GAAP.

          "CLAIMS" means any claims, actions, suits, proceedings, disbursements,
judgments, demands, damages, penalties, fines, losses, liabilities, costs and
expenses, including reasonable attorneys' fees and amounts paid in settlements.

          "COLOCATION AGREEMENTS" means any existing contractual arrangements
and agreements pursuant to which BSPCI, the Carolinas Partnership or any of
their Affiliates share any Site with other providers of wireless
telecommunications services and to which BSPCI, the Carolinas Partnership or
such Affiliate is a Party, as set forth in SCHEDULE A to EXHIBIT A attached
hereto.

          "COMMUNICATIONS EQUIPMENT" means, as to any Site, transmitting and/or
receiving equipment and other equipment installed at the Reserved Space (as to
BSPCI) or any Available Space (as to a Space Subtenant), which is or will be
necessary in providing current and future wireless communication services,
including without limitation, switches, antennas, microwave dishes, panels,
conduits, flexible transmission lines, cables, radio, amplifiers, filters and
other transmission or communications equipment (including interconnect
transmission equipment, transmitter(s), receiver(s) and accessories) and such
other equipment and associated software as may be necessary in order to provide
such wireless communication services, including without limitation, voice or
data.  Communications Equipment shall include any existing, replaced and
upgraded Communications Equipment.

          "COMMUNICATIONS FACILITY" means, as to any Site, the Reserved Space
(as to  BSPCI) or any Available Space (as to a Space Subtenant), together with
such BellSouth Entity's or such Space Subtenant's Improvements.

          "COMPLETION" has the meaning given to such term in the Construction
Agreement.

          "CONSTRUCTION AGREEMENT" means the Agreement to Build to Suit of even
date herewith among BSPCI, the Carolinas Partnership, TowerCo and CCIC.

          "CONTROL" means the ownership, directly or indirectly, of sufficient
voting shares of an entity, or otherwise the possession, directly or indirectly,
of the power to direct or cause the direction of the management and policies of
an entity, or the power to veto major policy decisions of any such entity,
whether through the ownership of voting securities, by contract or otherwise.

          "CPI" means the Consumer Price Index for all Consumers, U.S., City
Average (1982-84 = 100) All Items Index, published by the Bureau of Labor
Statistics, United States Department of Labor.  If the CPI shall cease to be
compiled and published at any time during the term of this Sublease, but a
comparable successor index is compiled and published by the Bureau of Labor
Statistics, United States Department of Labor, the adjustments to the Rent
provided for

                                       3
<PAGE>

in SECTION 11, if any, shall be computed according to such successor index, with
appropriate adjustments in the index to reflect any differences in the method of
computation from the CPI. If, at any time during the term of this Sublease,
neither the CPI nor a comparable successor index is compiled and published by
the Bureau of Labor Statistics, the index for "all items" compiled and published
by any other branch or department of the federal government shall be used as a
basis for calculation of the adjustments to the Rent provided for in SECTION 11,
and if no such index is compiled and published by any branch or department of
the federal government, the statistics reflecting cost of living increases as
compiled by any institution or organization or individual generally recognized
as an authority by financial and insurance institutions shall be used.

          "CPI INCREASE" means an increase, if any, (expressed as a percentage)
in the most recently published CPI value as of January 1 of the applicable Site
Term Year, from the CPI value published for January 1 of the immediately
preceding Site Term Year.

          "DATE OF TAKING" means the earlier of the date upon which title to
applicable Site, or any portion thereof, subject to a Taking is vested in the
condemning authority, or the date upon which possession of such Site or portion
thereof is taken by the condemning authority.

          "DEFAULT NOTICE" has the meaning given to such term in SECTION 3(H).

          "EFFECTIVE DATE" means the date of this Sublease, as set forth in the
caption of the Sublease.

          "EMERGENCY" has the meaning given to such term in SECTION 30(B).

          "EXISTING SUBLEASE" means, with respect to any Site, any subleases,
licenses, leases or other agreements for use of a Tower location and other space
on such Site between the applicable BellSouth Entity and any other Person that
is in effect as of the date of the Site Designation Supplement for such Site.

          "FAA" means the United States Federal Aviation Administration.

          "FCC" means the United States Federal Communications Commission.

          "GROUND LEASE" means, as to a Leased Site, the ground lease or other
agreement, pursuant to which the applicable BellSouth Entity or BellSouth Entity
Affiliate holds a leasehold interest, leasehold estate or other real property
interest.

          "GROUND LESSOR" means, as to a Leased Site, the "lessor" or "landlord"
under the Ground Lease thereof.

          "GROUND RENTS" has the meaning given to such term in SECTION 11(C).

          "INITIAL SITE" means any Site set forth in EXHIBIT A.

                                       4
<PAGE>

          "IMPROVEMENTS" means, as to each Site, (i) one or more concrete
equipment pads or raised platforms capable of accommodating exterior cabinets,
electrical service and access for the placement and servicing of a BellSouth
Entity's and, if applicable, each Space Subtenant's Improvements; (ii) shelters
or exterior cabinets; (iii) generators and associated fuel tanks; (iv) grounding
rings (other than those for BellSouth Entity equipment shelters); (v) fencing;
(vi) signage; (vii) connections for utility service up to the meter; (viii)
access road improvements; (ix) common shelters, if any; and (x) such other
customary equipment and improvements as may be installed on a Site (including
the Land and the Tower) by a BellSouth Entity, in each case only as installed or
constructed by TowerCo for shared use by such BellSouth Entity and Space
Subtenants.  Improvements do not include Communications Equipment.

          "INVESTMENT GRADE" means outstanding senior unsecured debt securities
rated BBB or higher by Standard & Poor's or Baa or higher by Moody's.

          "LAND" means, as to each Site, the land constituting a portion of such
Site, together with all easements and other rights appurtenant thereto.

          "LAWS" means all federal, state, county, municipal and other
governmental constitutions, statutes, ordinances, codes, regulations,
resolutions, rules, requirements and directives and all decisions, judgments,
writs, injunctions, orders, decrees or demands of courts, administrative bodies
and other authorities construing any of the foregoing.

          "LEASED SITE" means a Site as to which any BellSouth Entity holds a
leasehold interest, leasehold estate or other possessory interest therein
pursuant to a Ground Lease.

          "LESSOR" means, as to each Site, any BellSouth Entity or any of its
Affiliates that either: (i) owns fee simple title thereto; or (ii) holds a
leasehold interest, leasehold estate or other possessory interest therein
pursuant to a Ground Lease.

          "LIENS" means, as to each Site, an interest or a claim by a Person
other than a BellSouth Entity or any of its Affiliates, whether such interest or
claim is based on the common law, statute or contract, including, without
limitations, liens, charges, Claims, leases, licenses, Mortgages, conditional
agreements, title retention agreements, preference, priority or other security
agreements or preferential arrangements of any kind, reservations, exceptions,
encroachments,  covenants, conditions, restrictions and other title exceptions
and encumbrances affecting all or any part of the Land, the Tower or
Improvements thereof.

          "MARKET CAPITALIZATION" means, as to any Person, as of any date of
determination, either (i) the number of issued and outstanding shares of such
Person's Capital Stock (as set forth in such Person's most recent filings with
the U.S. Securities and Exchange Commission) multiplied by the closing price of
the Capital Stock of such Person on any exchange on which such stock is listed
or (ii) the total market value of the equity of such Person, determined by a
commercially reasonable appraisal process.

          "MARKET TRANSACTION" has the meaning given to such term in SECTION
26(B).

                                       5
<PAGE>

          "MORTGAGE" means, as to any Site, any mortgage, deed to secure debt,
deed of trust, trust deed or other conveyance of, or encumbrance against, the
Land or Improvements on such Site as security for any debt, whether now existing
or hereafter arising or created.

          "MORTGAGEE" means, as to any Site, the holder of any Mortgage,
together with the heirs, legal representatives, successors, transferees and
assigns of the holder.

          "NDA" means a non-disturbance, subordination and attornment agreement
executed between a Mortgagee and TowerCo.

          "NET WORTH" means, with respect to a Person, the total assets minus
the total liabilities of such Person and its Subsidiaries on a consolidated
basis, as shown on the then current balance sheet of such Person and determined
in accordance with GAAP.

          "OWNED SITE" means a Site in which any BellSouth Entity owns fee
simple title.

          "PARTITIONING EVENT" means each closing of a transaction whereby a
BellSouth Entity Affiliate obtains, in its own name, a license from the FCC to
provide wireless communications service within a portion of the Territory and
purchases from the Carolinas Partnership the portion of the Carolinas
Partnership's wireless communications system that is located within such area
(i.e., towers and base station controllers) by making payment to the Carolinas
Partnership in reimbursement of its costs related thereto.

          "PARTY" means each of BSPCI, the Carolinas Partnership, TowerCo and
CCIC, as appropriate.  "PARTIES" means BSPCI, the Carolinas Partnership, TowerCo
and CCIC together.

          "PERMITTED LIENS" has the meaning given to such term in SECTION 19(A).

          "PERMITTED SUBLEASEHOLD MORTGAGEE" means a Mortgagee that has assets
at the time of the execution of the Permitted Subleasehold Mortgage of not less
than $2 billion, and is:  (i) a national bank; (ii) a commercial, national or
state savings bank or trust company; (iii) an investment or merchant bank; (iv)
a foreign bank qualified to do business in the states in which the Sites are
located and authorized to make loans in the United States; (v) a charitable
foundation; (vi) a real estate investment fund; (vii) an insurance company;
(viii) a credit company; (ix) a pension or retirement fund or a fund which, in
turn, is funded substantially by a pension or retirement fund; (x) a real estate
investment trust; (xi) a venture capital firm; (xii) a mortgage banking house;
(xiii) an international bank or investment company; or (xiv) any other
institutional lender performing lending functions similar to any of the
foregoing.  Notwithstanding the foregoing, in no event shall a Permitted
Subleasehold Mortgagee be a BellSouth Entity Competitor.

          "PERMITTED TRANSFEREE" means:  (i) a Person who has outstanding debt
that is Investment Grade; (ii) with respect to a Market Transaction involving
twenty percent (20%) or more of all Sites now or hereafter subject to this
Sublease and less than forty percent (40%) of all Sites now or hereafter subject
to this Sublease, a Person reasonably believed by BSPCI to have a current Net
Worth or Market Capitalization of at least $50 million or Cash Flow for the last
full

                                       6
<PAGE>

fiscal year of such Person of at least $10 million; (iii) with respect to a
Market Transaction involving forty percent (40%) or more of all Sites now or
hereafter subject to this Sublease and less than eighty percent (80%) or more of
all Sites now or hereafter subject to this Sublease, a Person reasonably
believed by BSPCI to have a current Net Worth or Market Capitalization of at
least $250 million or Cash Flow for the last full fiscal year of such Person of
at least $50 million; or (iv) with respect to a Market Transaction or any other
transaction (including without limitation a transaction contemplated by SECTION
26(B)(III)(Z)) involving eighty percent (80%) or more of all Sites now or
hereafter subject to this Sublease, a Person reasonably believed by BSPCI to
have a current Net Worth or Market Capitalization of at least $500 million or
Cash Flow for the last full fiscal year of such Person of at least $100 million.

          "PERMITTED TOWERCO TRANSFEREE" means:  (i) a Person who has
outstanding debt that is Investment Grade; (ii) with respect to a Transfer of
the Subleased Property involving more than twenty percent (20%) but less than
forty percent (40%) of all Sites now or hereafter subject to this Sublease, a
Person reasonably believed by TowerCo to have a current Net Worth or Market
Capitalization of at least $50 million or Cash Flow for the last full fiscal
year of such Person of at least $5 million; (iii) with respect to a Transfer of
the Subleased Property involving forty percent (40%) or more of all Sites now or
hereafter subject to this Sublease and less than eighty percent (80%) or more of
all Sites now or hereafter subject to this Sublease, a Person reasonably
believed by TowerCo to have a current Net Worth or Market Capitalization of at
least $250 million or Cash Flow for the last full fiscal year of such Person of
at least $50 million; or (iv) with respect to a Transfer of the Subleased
Property or any other transaction of the types referred to in SECTION 26(A),
involving eighty percent (80%) or more of all Sites now or hereafter subject to
this Sublease, a Person reasonably believed by TowerCo to have a current Net
Worth or Market Capitalization of at least $500 million or Cash Flow for the
last full fiscal year of such Person of at least $100 million.

          "PERMITTED USE" means use of the Subleased Property of each Site for
the purposes of: (i) constructing, installing, operating, managing, maintaining
and marketing the Tower and Improvements thereof and making further Improvements
to such Site, and (ii) for further use of such Subleased Property by Space
Subtenants (including BSPCI with respect to any Available Space), and the right
to use by Space Subtenants of any portions of the Land, Tower and Improvements
of each Site as are reasonably necessary for operation of the Communications
Facilities of such Space Subtenants.

          "PERSON" means an individual, partnership, joint venture, limited
liability company, association, corporation, trust or any other legal entity.

          "PROCEEDS" means all insurance moneys recovered or recoverable by
TowerCo or a BellSouth Entity as compensation for casualty damage to any Site
(including the Tower and Improvements thereof).

          "PUT DATE" means the effective date of BSPCI's election to vacate and
terminate its interest in the Reserved Space of a Site and add such Reserved
Space to the Subleased Property of such Site, pursuant to the Put Notice.

                                       7
<PAGE>

          "PUT NOTICE" means a notice given by BSPCI pursuant to SECTION 9
exercising the Put Right.

          "PUT RIGHT" means the right of BSPCI to elect to vacate and terminate
its interest in the Reserved Space with respect to a Site and add such Reserved
Space to the Subleased Property of such Site as described in and limited by
SECTION 9.

          "REIMBURSABLE MAINTENANCE EXPENSES" has the meaning given to such term
in SECTION 30(A).

          "RENT" has the meaning given such term in SECTION 11(C).

          "RESERVED SPACE" means, as to each Site:  (i) a portion of the Land
and Improvements of such Site used by a BellSouth Entity, designated and shown
by the Lessor  thereof as such Lessor's area on a site plan attached to the
applicable Site Designation Supplement, as such site plan may be amended from
time to time pursuant to this Sublease, as reserved for exclusive use and
occupancy by such BellSouth Entity, including without limitation, MSC's and
other switches, such BellSouth Entity's Improvements located on the Land, and
parking spaces; (ii) the Tower location on the Tower of such Site used by a
BellSouth Entity, designated and shown by such BellSouth Entity as such
BellSouth Entity's area on a Tower plan attached to the applicable Site
Designation Supplement, as such Tower plan may be amended from time to time
pursuant to this Sublease, as reserved for exclusive use and occupancy of such
Site by such BellSouth Entity, including without limitation, any antennas
(depicting any antenna arrays and, if reasonably available, setting forth their
model numbers), antenna mounting hardware constituting a tower platform to hold
such antennas or a sector frame for such antennas, transmission lines,
amplifiers and filters located on the Tower subject to SECTION 5 hereof, and
consistent with other nine (9) panel antenna arrays currently existing on other
Towers on the date hereof; (iii) a portion of the Land, having an area of five
(5) feet, in the case of BTS Sites, and three (3) feet, in the case of all other
Sites around any equipment cabinet which is on or permitted to be on the Land
that is in the Reserved Space; and (iv) any and all rights pursuant to SECTION
5(B) and 25 and all appurtenant rights reasonably inferable to permit each
BellSouth Entity's full use and enjoyment of the Reserved Space, including
without limitation, the appurtenances specifically described in SECTION 5, all
in accordance with SECTION 5.  Notwithstanding the foregoing, but subject to the
next succeeding sentence, the exclusive portion of the Land and Improvements is
limited to that portion of the Tower and the Land where a BellSouth Entity's
Communications Equipment and a BellSouth Entity's Improvements are located.
Notwithstanding anything to the contrary contained herein and regardless of the
actual number of antennas and other equipment existing or placed on the Reserved
Space of any Site on the date hereof, the Reserved Space of any Site (including
BTS Sites) shall include space for, and be capable of supporting:  (i) up to
nine (9) panel antennas arrays and related equipment, (ii) up to twelve (12)
coaxial lines, (iii) a low profile platform consistent with platforms
customarily placed on other Towers, and (iv) as to any BTS Site only, a
microwave dish placed seventeen feet (17') below (measured center line to center
line) the location of such panels, subject to SECTION 5(E).

                                       8
<PAGE>

          "RESTORATION" means, as to a Site that has suffered casualty damage,
such restoration, repairs, replacements, rebuilding, changes and alterations,
including the cost of temporary repairs for the protection of such Site, or any
portion thereof, pending completion thereof, required to restore the applicable
Site (including the Tower and Improvements thereon) to a condition which is at
least as good as the condition which existed immediately prior to such damage,
and such other changes or alterations as may be reasonably acceptable to BSPCI
and TowerCo or required by Law.

          "RIGHT OF FIRST REFUSAL" means the right of BSPCI, exercisable in its
sole discretion, to sublease any Available Space from TowerCo pursuant to
SECTION 25.

          "RIGHT OF SUBSTITUTION" means the right of BSPCI, exercisable in its
sole discretion, to substitute the Reserved Space of any Site for an Available
Space on such Site by relocation of its Communications Facility on such Site to
such Available Space, all pursuant to SECTION 25.

          "SITE" means any site now or hereafter subject to this Sublease,
including without limitation: (i) any Initial Site; and (ii) any Site added to
this Sublease pursuant to a Site Designation Supplement with respect thereto.
Reference to a Site shall include the Land thereof, and the Tower and
Improvements on the Land, but shall not include Communications Equipment
thereon.

          "SITE COMMENCEMENT DATE" means the date on which the Term of this
Sublease commences as to such Site, as set forth in the applicable Site
Designation Supplement.

          "SITE DESIGNATION SUPPLEMENT" means, as to any Site, a supplement to
this Sublease, in substantially the form of EXHIBIT B attached hereto and
otherwise in recordable form, pursuant to which such Site is made subject to
this Sublease, and the subleased portions thereof added to the Subleased
Property.

          "SITE MAINTENANCE CHARGE" has the meaning given to such term in
SECTION 11(C).

          "SITE PAYMENT" has the meaning given to such term in SECTION 11(C).

          "SITE EXPIRATION DATE" means, as to any Site, the date on which the
Term of this Sublease expires.

          "SITE TERM YEAR" means, as to each Site:  (i) if the Site Commencement
Date is the first day of a calendar month, the twelve (12) calendar month period
commencing on the Site Commencement Date, and ending on the day immediately
preceding the first anniversary of the Site Commencement Date, and each
succeeding such twelve (12) calendar month period during the term of this
Sublease; or (ii) if the Site Commencement Date is not the first day of a
calendar month, the twelve (12) calendar month period commencing on the first
day of the first calendar month following the Site Commencement Date, and ending
on day immediately preceding the first anniversary of such date, and each
succeeding such twelve (12) calendar month period during

                                       9
<PAGE>

the term of this Lease, provided, however, that, if the Site Commencement Date
is a day other than the first day of a calendar month, the first Site Term Year
shall include the period from the Site Commencement Date through the last day of
the calendar month during which the Site Commencement Date occurs.

          "SPACE SUBTENANT" means, as to any Site, any Person (including BSPCI
in respect of any Available Space), which: (i) is a "sublessee" under an
Existing Sublease affecting such Site; or (ii) subleases, licenses or otherwise
acquires from TowerCo the right to use an Available Space on such Site.

          "SPACE SUBTENANT'S IMPROVEMENTS" means, as to any Space Subtenant at
any Site, such Space Subtenant's Communications Equipment, together with
equipment buildings, equipment shelters and other constructions located on the
Land of the Available Space of such Site and used by such Space Subtenant.

          "SUBLEASE" means this Sublease, together with any and all Exhibits,
Schedules and attachments hereto, as the same may hereafter be modified and
amended, including, without limitation, pursuant to Site Designation
Supplements.  References to this Sublease in respect of a particular Site shall
include the Site Designation Supplement therefor; and references to this
Sublease in general and as applied to all Sites shall include all Site
Designation Supplements.

          "SUBLEASED PROPERTY" means each Site that is now or hereafter subject
to this Sublease, including the Land, Tower and Improvements thereof, LESS AND
EXCEPT in each instance the Reserved Space thereof, the applicable BellSouth
Entity's and Space Subtenants' Improvements on such Site and improvements of
Space Subtenants under the Existing Subleases.

          "SUBLEASE YEAR" means each succeeding twelve (12) calendar month
period commencing on the date hereof.

          "SUBLEASEHOLD ESTATE" means:  (i) the rights, title, interest, powers,
privileges, benefits and options of TowerCo under this Sublease (whether as
lessee of an Owned Site or as sublessee of a Leased Site); and (ii) all of the
right, title and interest of TowerCo in and to the Sites under this Sublease
(whether as lessee of an Owned Site or as sublessee of a Leased Site).

          "SUBSIDIARY" means, with respect to any Person, any corporation,
partnership, joint venture or other entity in which such Person owns, either
directly or indirectly, more than fifty percent (50%) of the outstanding Capital
Stock or other ownership or equity interests therein, as the case may be, or has
the power to direct or cause the direction of the management and policies
thereof.

          "SUBSTANTIAL PORTION OF SITE" means, as to a Site, so much of such
Site (including the Land, Tower and Improvements thereof, or any portion
thereof) as, when subject to a Taking, leaves the untaken portion unsuitable for
the continued feasible and economic operation of such Site for the Permitted
Use.

                                       10
<PAGE>

          "SUBSTITUTION" means the relocation by BSPCI on a Site, pursuant to
its Right of Substitution.

          "TAKING" means, as to any Site, any condemnation or exercise of the
power of eminent domain by any public authority vested with such power, or any
taking in any other manner for public use, including a private purchase, in lieu
of condemnation, by a public authority vested with the power of eminent domain.

          "TAXES AND ASSESSMENTS" means, as to each Site, any and all of the
following levied, assessed or imposed upon, against or with respect the Site
(including the Reserved Space), any part of the Site (including the Reserved
Space), or the use and occupancy of the Site (including the Reserved Space) at
any time during the Term as to such Site:  (i) real property and personal
property ad valorem taxes and assessments, except as relates specifically to the
BellSouth Entity's Communications Equipment; (ii) charges made by any public or
quasi-public authority for improvements or betterments related to the Site;
(iii) sanitary taxes or charges, sewer or water taxes or charges; (iv) any tax
levied, assessed or imposed upon or against the Rent reserved hereunder or upon
the BellSouth Entity's interest in the Site or this Sublease (other than income
taxes or any future tax which is established in lieu of income taxes); and (v)
any other governmental or quasi-governmental impositions, charges, encumbrances,
levies, assessments, fees or taxes of any nature whatsoever related to the Site,
whether general or special, whether ordinary or extraordinary, whether foreseen
or unforeseen and whether payable in installments or not, except as it relates
specifically to the BellSouth Entity's Communications Equipment.

          "TERM" means:  (i) as to this Sublease, the term set forth in SECTION
8(A); and (ii) as to each Site, the term during which this Sublease is
applicable to such Site.

          "TOWER" means a radio tower structure or structures on a Site.

          "TOWERCO INDEMNITEE" means TowerCo, its Affiliates, and the respective
directors, officers, employees, agents, contractors, subcontractors, advisors
and consultants of TowerCo or its respective Affiliates (except BSPCI and any
contractors, subcontractors, advisors and consultants of BSPCI).

          "TOWERCO WORK" has the meaning given to such term in SECTION 13(B).

          "VOTING STOCK" of any Person as of any date means the Capital Stock of
such Person that is at the time entitled to vote in the election of the Board of
Directors of such Person.

          "WITHDRAWAL DATE" means the effective date of BSPCI's election to
terminate its reservation of the Reserved Space and add such Reserved Space to
the Subleased Property of such Site pursuant to Withdrawal Notice.

          "WITHDRAWAL NOTICE" means a notice given by BSPCI pursuant to SECTION
10 exercising the Withdrawal Right.

                                       11
<PAGE>

          "WITHDRAWAL RIGHT" means the right of BSPCI to elect to terminate its
reservation of the Reserved Space with respect to a Site and add such Reserved
Space to the Subleased Property of such Site as described in SECTION 10.

          Any other capitalized terms used in this Sublease shall have the
respective meanings given to them elsewhere in this Sublease.

          2.  SUBLEASE DOCUMENTS.

          (a) This Sublease shall consist of the following documents, as amended
from time to time as provided herein:

              (i)  this Sublease document;

             (ii)  the following Exhibits, which are incorporated herein by
                   this reference:

                   Exhibit A  List of Sites
                   Exhibit B  Form of Site Designation Supplement
                   Exhibit C  Site Maintenance Obligations
                   Exhibit D  Standard Procedures

            (iii)  Schedules to the Exhibits, which are incorporated herein
                   by reference; and

               (iv) such additional documents as are incorporated by reference.

          (b) If any of the foregoing are inconsistent, this Sublease shall
prevail over the Exhibits, the Schedules and additional incorporated documents.

          3.  SUBLEASED PROPERTY.

          (a) Subject to the terms and conditions of this Sublease, each
BellSouth Entity hereby lets, leases and demises unto TowerCo, and except as
otherwise provided in SECTIONS 3(H) and 23(B), TowerCo hereby leases, takes and
accepts from each BellSouth Entity the Subleased Property of each Site, in its
"AS IS" condition, without any representation, warranty or covenant of or from
any BellSouth Entity or any of its Affiliates whatsoever as to the condition
thereof or the suitability thereof for any particular use, except as may be
expressly set forth in the Agreement to Sublease.  To each BellSouth Entity's
knowledge, the Towers are satisfactory in all material respects for its
continuing use consistent with its Permitted Use of such Towers.  Except as set
forth above, TowerCo hereby acknowledges that neither BSPCI, the Carolinas
Partnership nor any agent of BSPCI or the Carolinas Partnership has made any
representation or warranty, express or implied, with respect to any of the
Subleased Property, or any portion thereof, or the suitability or fitness for
the conduct of TowerCo's business or for any other

                                       12
<PAGE>

purpose, including the Permitted Use; and TowerCo further acknowledges that it
has had or by its execution and delivery of a Site Designation Supplement, will
have had sufficient opportunity to inspect and approve the condition of the
Subleased Property of each Site.

          (b) Each Site shall be made subject to this Sublease, and the
subleased portions thereof added to the Subleased Property, by the execution and
delivery of a Site Designation Supplement with respect thereto between the
applicable BellSouth Entity and TowerCo.  Each BellSouth Entity and TowerCo
acknowledge that a Site Designation Supplement is being executed and delivered
with respect to each Initial Site contemporaneously with the execution and
delivery of this Sublease.  Each BellSouth Entity and TowerCo acknowledge and
agree that this Sublease is intended to constitute a single sublease covering
the Subleased Property of all of the Sites and a single agreement covering all
the Sites, and not a separate sublease and agreement covering the individual
Sites.

          (c) This Sublease is subject to all matters affecting each BellSouth
Entity's right, title and interest in and to any Owned Site (including without
limitation, Existing Subleases and the interests of third parties as to any
Owned Sites that are subject to any Colocation Agreements); and, as to Leased
Sites, this Sublease is also subject to all matters affecting title to each
BellSouth Entity's leasehold interest, leasehold estate or other possessory
interest therein (including without limitation, Existing Subleases and the
interest of a third party as to any Leased Sites that are subject to Colocation
Agreements).

          (d) TowerCo hereby acknowledges that, as to the Subleased Property of
each Leased Site, this Sublease is a sublease by each BellSouth Entity under the
provisions of, and is subject and subordinate to all of the terms and conditions
of, the applicable Ground Lease of such Leased Site.  As to any Leased Site, no
BellSouth Entity shall be deemed to have assumed any duty or obligation of the
Ground Lessor under the applicable Ground Lease nor shall be liable or
responsible in any manner whatsoever for any failure of such Ground Lessor to
perform any such duty or obligation.  Except as provided in SECTION 3(F) or
3(H), TowerCo shall abide by, comply in all respects with, and fully and
completely perform all terms, covenants, conditions, and provisions of each
Ground Lease (including, without limitation, terms, covenants, conditions, and
provisions relating to maintenance, insurance and alterations) as if TowerCo
were the "ground lessee" thereunder and, to the extent evidence of such
performance must be provided to the Ground Lessor of the applicable Ground
Lease, TowerCo shall provide such evidence to the applicable BellSouth Entity.
TowerCo shall not engage in or permit any conduct that would: (i) constitute a
breach of or default under any Ground Lease; or (ii) result in the Ground Lessor
being entitled to terminate the applicable Ground Lease or to terminate any
BellSouth Entity's right as ground lessee under such Ground Lease, or to
exercise any other rights or remedies to which the Ground Lessor may be entitled
for a default or breach under the applicable Ground Lease.  During the Term of
this Sublease, each BellSouth Entity agrees to exercise prior to the expiration
thereof and in accordance with the provisions of the applicable Ground Lease,
any and all renewal options existing as of the date of the Site Designation
Supplement, and as may be further extended or renewed by such BellSouth Entity
pursuant to the terms of this Sublease, for any Leased Site under the Ground
Leases of such Leased Sites;

                                       13
<PAGE>

provided, however, that such renewals shall not extend the Expiration Date for
the Site Designations Supplements for such Leased Sites.

          (e) Except as provided in SECTION 3(F), TowerCo shall not be entitled
to act as agent for, or otherwise on behalf of, any BellSouth Entity or to bind
such BellSouth Entity in any way whatsoever.

          (f) Subject to the provisions of SECTION 8 and after the applicable
BellSouth Entity has exercised all renewal options pursuant to SECTION 3(D),
TowerCo, at TowerCo's sole cost and expense, shall be responsible for and shall
negotiate and obtain any extension or renewal of the Ground Leases of the Leased
Sites on behalf of and for the benefit of such BellSouth Entity, and such
BellSouth Entity shall use commercially reasonable efforts to assist TowerCo in
obtaining such extension or renewal, provided that such extension or renewal
does not impose any liability on such BellSouth Entity for which TowerCo is not
responsible under the terms of this Sublease.  TowerCo shall commence its
negotiations with the applicable Ground Lessor sufficiently in advance of any
expiration of each Ground Lease and in any event, not later than two (2) years
prior to such expiration.  Notwithstanding anything to the contrary contained
herein, if at any time during the twelve-month period immediately prior to any
expiration of a Ground Lease of a Leased Site, TowerCo has not successfully
effected the extension or renewal of such Ground Lease, BSPCI shall have the
right to take responsibility for conducting and completing negotiations for such
extension or renewal on its own behalf and upon BSPCI's exercise of such right
by written notice thereof, TowerCo shall cease participating in any negotiations
with the applicable Ground Lessor as to such Site.  Until such time as BSPCI so
exercises its right to conduct and complete negotiations for such extension or
renewal, TowerCo shall be exclusively responsible for conducting and completing
such negotiations and BSPCI shall not participate, except to the extent
reasonably requested by TowerCo, in any negotiations with the applicable Ground
Lessor as to such Site.  In the event BSPCI completes negotiations for such
extension or renewal, TowerCo shall have the option, exercisable within thirty
(30) days of receipt of notice of the terms of the extension or renewal, of (i)
assuming all payments for the extension or renewal and retaining its sublease
interest in such Site or (ii) assigning all of its interests in such Site to
BSPCI as of the date the Ground Lease would have expired had BSPCI not extended
or renewed such Ground Lease, and the Site Maintenance Charge and TowerCo's
obligation to pay Rent, if any, shall terminate effective that date.  If neither
TowerCo on behalf of and for the benefit of BSPCI nor BSPCI is able to extend or
renew any Ground Lease in accordance with this SECTION 3(F), then the Parties
shall permit such Ground Lease to expire on the applicable expiration date and
this Sublease shall have no further force and effect as to the Subleased
Property of the Leased Site to which such Ground Lease applies.  Each of TowerCo
and CCIC agrees that neither it, nor any of its Affiliates, shall seek to
obtain, obtain or hold, any interest in any Ground Lease or its underlying fee
interest that is superior or prior to BellSouth Entity's interests in such
Ground Lease.  TowerCo shall have the right, up to the date on which BSPCI
exercises its right to conduct and complete negotiations with the applicable
Ground Lessor, to acquire the fee simple interest in the Site from the Ground
Lessor and transfer such fee simple interest to BSPCI for $1.00, in which event
there shall be no Rent for that Site as of the date fee simple title vests in
BSPCI; provided that, if there is a continuing unwaived event of

                                       14
<PAGE>

default by the applicable BellSouth Entity with respect to the Ground Lease of
any Site, TowerCo shall have no obligation to transfer to BSPCI the fee simple
interest in such Site. Except as provided above or as TowerCo may otherwise
agree, no BellSouth Entity shall take any action to amend any Ground Lease,
other than to exercise renewals expressly provided therein. If any subdivision
is required for the transfer of such fee simple interest, each BellSouth Entity
shall cooperate with TowerCo to the extent reasonably requested, including
without limitation by executing any applications required for such subdivision,
all at TowerCo's sole cost and expense.

          (g) Subject to SECTION 25 and SECTION 26, BSPCI's right to sell,
convey, transfer, assign or otherwise dispose of BSPCI's interest in and to any
Site (including BSPCI's interest in and to the Subleased Property of such Site)
shall be unrestricted.

          (h) Notwithstanding anything to the contrary contained herein, each
BellSouth Entity represents to TowerCo that as of the date of the applicable
Site Designation Supplement, the applicable Ground Lease for a Leased Site will
be in full force and effect and no BellSouth Entity will be in default under any
such Ground Lease in any material respect as a result of such BellSouth Entity's
acts or omissions.  Each BellSouth Entity further agrees that it will promptly
pay or cause to be paid the Ground Rent under the applicable Ground Leases of
the Leased Sites during the Term of this Sublease when such payments become due
and payable.  Each BellSouth Entity shall pay the Ground Rent in respect of the
applicable Site, for so long as this Sublease is in effect as to such Site,
notwithstanding that TowerCo may be in default of its obligations hereunder.
Each BellSouth Entity shall otherwise perform any obligations under and comply
with the terms of the applicable Ground Leases, but only if such obligations are
expressly reserved to such BellSouth Entity for its performance under the terms
of this Sublease.  Upon receipt by any BellSouth Entity of any notice of default
or notice of an act or omission which could with the passing of time and/or the
giving of notice constitute an event of default under a Ground Lease or non-
compliance with a term of a Ground Lease (the "DEFAULT NOTICE"), BSPCI shall,
within five (5) days after receipt of the Default Notice, provide TowerCo with a
copy of the Default Notice. If such default or non-compliance with a term of a
Ground Lease is caused by TowerCo or any Space Subtenant, TowerCo shall, and
shall cause the applicable Space Subtenant, cure or otherwise remedy such
default or non-compliance.  If any such default or non-compliance with a term of
a Ground Lease (in respect of an obligation expressly reserved for performance
by any BellSouth Entity) is caused by the applicable BellSouth Entity, then
BSPCI shall, on behalf of such BellSouth Entity, within two (2) days after the
expiration of the aforementioned 5-day period, provide TowerCo a letter stating
that (i) the default or non-compliance, if a payment default, or if the default
is in respect of an obligation expressly reserved for performance by such
BellSouth Entity, has been cured or remedied, (ii) if the default is in respect
of an obligation expressly reserved for performance by such BellSouth Entity,
the default (other than a payment default) has not been cured but will be cured
within the time period provided under the Ground Lease, together with a
reasonably detailed explanation of the actions such BellSouth Entity intends to
take to effect such cure, its basis for concluding that such actions will be
accepted by the Ground Lessor as an adequate cure or (iii) the basis, if any,
for such BellSouth Entity's good faith position that there is no default or non-
compliance if the

                                       15
<PAGE>

default is in respect of an obligation expressly reserved under this Sublease
for performance by such BellSouth Entity ("BELLSOUTH ENTITY'S NOTICE"). If BSPCI
does not or cannot provide the BellSouth Entity's Notice or if, subsequent to
delivery of the BellSouth Entity's Notice to TowerCo, such BellSouth Entity is
unable to effect an appropriate cure, then TowerCo has the right, but not the
obligation, to take such action as may reasonably be necessary to cure or
otherwise remedy such default or non-compliance and, in such event, TowerCo will
have the right to demand prompt reimbursement from such BellSouth Entity of any
and all amounts expended by TowerCo or on TowerCo's behalf, together with
interest at the rate of eighteen percent (18%) per annum from the date of
TowerCo's payment until the date repaid by such BellSouth Entity. TowerCo's
failure to take any such action shall not constitute or be deemed a waiver of
any rights it may have to assert Claims against such BellSouth Entity for a
breach of its obligations under this Sublease. Notwithstanding anything in this
Sublease to the contrary, unless an obligation under a Ground Lease represents a
payment default by BSPCI or is expressly reserved under this Sublease for
performance by the applicable BellSouth Entity, any default referred to in the
Default Notice shall constitute a default by TowerCo under this Sublease.

          (i) Notwithstanding anything to the contrary contained herein, TowerCo
shall have the right, at TowerCo's cost and expense, to make Alterations to any
Site and to expand a Site, including the expansion of the Land, as TowerCo deems
reasonably necessary for the conduct of its business pursuant to this Sublease,
including but not limited to the extension of the Tower, the re-enforcement of
the Tower, and the construction of additional Towers on such Site; provided,
however, that such Alterations or expansions shall be subject to TowerCo's
performance of its obligations pursuant to this Sublease, including but not
limited to SECTIONS 13 and 15 and shall not disrupt or otherwise adversely
affect any BellSouth Entity's Permitted Use of its Reserved Space.  TowerCo
covenants and agrees that any such Alterations or expansions shall be made in a
workmanlike manner in compliance with standard industry practices and with all
applicable Laws.

          4.  EXISTING SUBLEASES AND COLOCATION AGREEMENTS.

          (a) Without limiting the generality of SECTION 3, TowerCo expressly
acknowledges that, as to each Site, this Sublease is subject to all Existing
Subleases affecting such Site, including, without limitation, Existing Subleases
executed prior to the applicable Site Commencement Date pursuant to any
Colocation Agreement.  In respect of each Site, the applicable BellSouth Entity
does hereby transfer, assign and convey over unto TowerCo, for the Term of this
Sublease in respect of such Site, all of its rights, title and interest as
"sublandlord" or "sublessor" in, to or under all, if any, Existing Subleases
affecting such Sites and does hereby delegate all of its duties, obligations and
responsibilities under the Existing Subleases to TowerCo.  TowerCo does hereby
assume and agree to pay and perform all of the duties, obligations, liabilities
and responsibilities of each BellSouth Entity as "sublandlord" or "sublessor"
under the Existing Subleases affecting each Site arising from and after the date
of the Site Designation Supplement for such Site. By virtue of the foregoing
assignment, and during the Term of this Sublease, as to each Site, all Existing
Subleases affecting such Site shall constitute

                                       16
<PAGE>

Space Subleases for the purposes hereof, and commencing on the Site Commencement
Date for such affected Site, TowerCo shall receive all rents payable thereunder.
Each BellSouth Entity shall allow each Colocation Agreement in effect on the
date hereof to expire and shall not renew or amend any such Colocation
Agreement, and shall not enter into any new Colocation Agreement.

          (b) Notwithstanding anything to the contrary contained herein, TowerCo
shall sublease any Available Space of any Site to the other party to a
Colocation Agreement under and in accordance with the terms and conditions of
such Colocation Agreement and not this Sublease, including without limitation,
terms respecting rent under such Colocation Agreement, except  that TowerCo will
have the right to sublet any Available Space to such other party to a Colocation
Agreement under terms and conditions different from the terms and conditions of
such Colocation Agreements, so long as such different terms do not affect any of
BSPCI's rights under such Colocation Agreement.  TowerCo shall receive all rents
and other economic benefits from parties to Colocation Agreements that occupy
any Available Space.  BSPCI retains and reserves all rights under the Colocation
Agreements to occupy any space on any cell site location (including towers and
improvements thereof) of any other parties to the Colocation Agreements that is
available for occupancy pursuant to such Colocation Agreements (the "AVAILABLE
COLOCATION SPACE").   TowerCo shall have no right or obligation to amend or
modify any Colocation Agreement, except as to the terms applicable to the
occupancy of any Available Space by the party to such Colocation Agreement;
provided, however, that such amendment or modification does not affect BSPCI's
rights thereunder.  From time to time, BSPCI shall give TowerCo written notice
of the intent of third parties to Colocation Agreements to occupy any Available
Space, and promptly following receipt of such notice, TowerCo shall cooperate
with BSPCI and the applicable third party so as to facilitate such third party's
occupancy of such Available Colocation Space.

          (c) TowerCo shall, and does hereby agree to, indemnify, defend and
hold each BellSouth Entity Indemnitee harmless from, against and in respect of
any and all Claims, paid, suffered, incurred or sustained by such BellSouth
Entity Indemnitee and in any manner arising out of, by reason of, or in
connection with any failure of the duties, obligations, liabilities and
responsibilities of any BellSouth Entity as "sublandlord" or "sublessor" under
any of the Existing Subleases affecting each Site and arising from and after the
date of the Site Designation Supplement for such Site, to be fully and
completely performed pursuant to the Existing Subleases, except to the extent
caused by such BellSouth Entity or a BellSouth Entity Indemnitee.

          (d) The assignment by each BellSouth Entity to TowerCo of the Existing
Subleases in respect of each Site shall automatically terminate and expire, such
Existing Subleases shall automatically be assigned to such BellSouth Entity, and
such BellSouth Entity shall accept such assignment, upon the expiration of the
Term of, or earlier termination of, this Sublease in respect of such Site.

                                       17
<PAGE>

          5.  RESERVED SPACE.  (a)  TowerCo expressly acknowledges that, as to
any Site, the Subleased Property of such Site does not include, and that each
BellSouth Entity has reserved and excepted from this Sublease, the Reserved
Space of such Site, regardless of whether or not such Reserved Space is now or
hereafter occupied, and, TowerCo further expressly acknowledges that as between
each BellSouth Entity and TowerCo, the Reserved Space of each Site shall, at all
times during the Term of this Sublease, be and remain the property of such
BellSouth Entity.   As an appurtenance to, and a part of, the Reserved Space of
each Site, each BellSouth Entity also reserves; (i) the right of ingress to and
egress from the entire Site, and access to the entire Tower and all Improvements
thereof (including any and all easements), at such times (on a 24-hour, seven
(7) day per week basis unless otherwise limited by the Ground Lease or other
restrictions of record that have priority over the Sublease), to such extent,
and in such means and manners (on foot or by motor vehicle, including trucks and
other heavy equipment), as such BellSouth Entity deems necessary or desirable in
connection with its full use and enjoyment of the Reserved Space, including,
without limitation, the construction, installation, use, operation, maintenance,
repair and replacement of its Communications Facility thereon; and (ii) the
right to use any available portion of the Subleased Property of a Site,
including the Land and Improvements thereof, for purposes of temporary location
and storage of any equipment (including generators and Communications Equipment)
and any part thereof in connection with performing any repairs or replacements
of such BellSouth Entity's Improvements; provided, however, that such storage
shall not have a material adverse effect on Space Subtenants' Permitted Use.

          (b) (i)  Subject to the availability of Available Space on the
applicable Tower (other than Towers on BTS Sites) at the time of the proposed
expansion, BSPCI may at any time expand the number of antennas at the Reserved
Space on Towers up to nine (9) panels consistent with other typical nine (9)
panel arrays currently existing on other Towers on the date hereof, without any
limitation on (x) the number of Sites in respect of which this right may be
exercised and (y) the increase in the weight or sail area resulting from such
expansion or upgrade.

          (ii) Subject to the availability of Available Space on the applicable
Tower (including Towers on BTS Sites) at the time of the proposed expansion of
the number of antennas, BSPCI shall have the further right to expand the number
of panels on the Towers beyond nine (9) panels if the weight and sail area of
the Communications Equipment are not increased by more than 10% of the weight
and sail area of a nine (9) panel antennas array that is typical of the other
Towers on the date hereof.

          (iii)  If BSPCI expands the number of antenna panels on a Tower beyond
nine (9) panels and the weight and sail area are exceeded by more than ten
percent (10%), then BSPCI shall have the right nonetheless to expand the number
of panels and shall pay TowerCo $100 per month per panel, not to exceed $1,600
per Tower.  Such amounts  increase each year after the date hereof by five
percent (5%) per year, until the tenth anniversary of the applicable Site
Designation Supplement and thereafter pursuant to SECTION 11(H).

                                       18
<PAGE>

          (c) Notwithstanding anything to the contrary contained herein,  the
Parties acknowledge and agree that the Reserved Space of each Site will include,
without limitation, all portions of such Site utilized or occupied by the
applicable BellSouth Entity as of the date hereof for the use, enjoyment,
operation or maintenance of such BellSouth Entity's Communications Facility on
such Site for the Permitted Use.

          (d) Not later than five (5) business days before BSPCI or its
Affiliate adds or relocates any antennas to the Tower location of any Site,
BSPCI shall give TowerCo notice of such addition or relocation.  No approval of
TowerCo shall be required for any addition or relocation.  Upon the request of
either Party, the Parties shall promptly execute such instruments as may be
reasonably required to further evidence such addition or relocation, including
without limitation an amendment to the applicable Site Designation Supplement,
and shall cause such amendment to be recorded at the applicable BellSouth
Entity's  cost and expense, unless the Parties otherwise agree.

          (e) With respect to any space which, pursuant to the definition of
"RESERVED SPACE", is reserved on a BTS Site for installation of a microwave dish
(the "RESERVED MICROWAVE SPACE"), if BSPCI or the Carolinas Partnership has not
installed a microwave dish in such space and TowerCo receives a bona fide
written application from a Space Subtenant to install equipment in such Reserved
Microwave Space (there being no other acceptable Available Space for such Space
Subtenant), BSPCI shall have ten (10) days from receipt of written notice from
TowerCo to confirm that BSPCI or the Carolinas Partnership will commence use of
the Reserved Microwave Space, otherwise such Reserved Microwave Space will be
released for use by such Space Subtenant.  In the event that such Reserved
Microwave Space is released, BSPCI shall be entitled to replacement microwave
space (the "REPLACEMENT MICROWAVE SPACE") located seventeen (17) feet below the
Reserved Microwave Space, except to the extent no suitable Replacement Microwave
Space exists by virtue of the operation of this SECTION 5(G).  The Replacement
Microwave Space shall be subject to the same notice, confirmation, release and
replacement process described above; provided that upon release by BSPCI of any
such space, BSPCI shall be entitled to replacement space (also, "REPLACEMENT
MICROWAVE SPACE") located seventeen (17) feet below such released space.

          6.  PERMITTED USE.

          (a) TowerCo shall use, and shall permit the use of, the Subleased
Property of each Site only for the Permitted Use.

          (b) TowerCo shall not use, or permit to be used, the Subleased
Property of any Site, or any portion thereof, by TowerCo, any Person (other than
a BellSouth Entity) or the public in such manner as might reasonably tend to
impair any BellSouth Entity's title to or interest in such Site, or any portion
thereof, or in such manner as might reasonably make possible a Claim or Claims
of adverse usage or adverse possession by the public, as such, or any Person
(other than a BellSouth Entity), or of implied dedication of such Subleased
Property, or any portion thereof.  Nothing contained in this Sublease and no
action or inaction by any BellSouth Entity shall be deemed or construed to mean
that any BellSouth Entity has granted to TowerCo any right,

                                       19
<PAGE>

power or permission to do any act or make any agreement that may create, or give
rise to or be the foundation for any such right, title, interest, lien, charge
or other encumbrance upon the estate of such BellSouth Entity in any Site.

          (c) No BellSouth Entity shall use, or permit to be used, the Reserved
Space of any Site, or any portion thereof, by any Person (other than TowerCo and
Space Subtenants) or the public in such manner as might reasonably tend to
impair TowerCo's title to or interest in such Site, or any portion thereof, or
in such manner as might reasonably make possible a Claim or Claims of adverse
usage or adverse possession by the public, as such, or any Person (other than
TowerCo and Space Subtenants), or of implied dedication of such Reserved Space,
or any portion thereof.  Nothing contained in this Sublease and no action or
inaction by TowerCo shall be deemed or construed to mean that TowerCo has
granted to any BellSouth Entity any right, power or permission to do any act or
make any agreement that may create, or give rise to or be the foundation for any
such right, title, interest, lien, charge or other encumbrance upon the estate
of TowerCo in any Site.

          7. ACCESS.

          The Subleased Property of a Site includes, as an appurtenance thereto,
a non-exclusive right for access to the Subleased Property of each Site on a 24-
hour, seven (7) day per week basis, on foot or motor vehicle, including trucks
and other heavy equipment, for the installation and maintenance of the Tower and
Improvements thereof and the Communications Facilities of Space Subtenants. The
Parties acknowledge and agree that the right to access the Subleased Property of
each Site, or any portion thereof, granted pursuant to this SECTION 7 shall be
granted to TowerCo and its authorized contractors, subcontractors, engineers,
agents, advisors, consultants, representatives, or other persons authorized by
TowerCo and under TowerCo's direct supervision, and to Space Subtenants.

          8. TERM.

          (a) The term of this Sublease, as to each Site, shall commence on the
Site Commencement Date set forth in the Site Designation Supplement with respect
thereto and shall expire on the Site Expiration Date therefor, which shall be
(i) in respect of an Owned Site (including any Site which becomes an Owned Site
after the date hereof, if any), one hundred (100) years from the date of the
Site Commencement Date, and (ii) in respect of a Site (other than an Owned
Site), one day before the Ground Lease with respect to such Site expires, as the
term of such Ground Lease may be renewed or extended pursuant to SECTION 3 (the
"TERM").  After the applicable BellSouth Entity has exercised all rights to
extend a Ground Lease as a matter of right pursuant to the terms of the existing
Ground Lease, and if BSPCI or TowerCo has successfully negotiated a new or
extended Ground Lease pursuant to SECTION 3(F), then the term of the Site
Designation Supplement under such Ground Lease for purposes of SECTION 10(A) and
all other purposes of this Sublease shall be deemed to recommence as of the
commencement date of the new or extended Ground Lease.

          (b) No surrender by TowerCo to any BellSouth Entity of the Subleased
Property of any Site or any portion thereof, prior to the expiration of the Term
as to such Site shall be valid or effective unless agreed to and accepted in
writing by BSPCI, and no act by any

                                       20
<PAGE>

BellSouth Entity, other than such a written acceptance, shall constitute an
acceptance by BSPCI, of any such surrender.

          (c) As to any Site, upon expiration or earlier termination of this
Sublease, TowerCo shall, at its cost and expense and upon instructions from
BSPCI, (i) within a reasonable period of time, but in no event less than thirty
(30) days, stop and cease, and cause the Space Subtenants on such Site to stop
and cease, the operation of their respective Communications Facilities on such
Site and shall remove, and cause all Space Subtenants to remove, all of
TowerCo's and such Space Subtenant's Improvements from such Site, including
without limitation, the Tower and the Improvements on such Site, and (ii) (A)
restore each Site that is a Leased Site to the condition required by the Ground
Lease, including, without limitation removal of the Tower and the Improvements
thereof (if required by the applicable Ground Lease) or restore each Site that
is an Owned Site to the condition it was in on the applicable Site Commencement
Date, or (B) vacate such Site leaving it in "AS IS" condition at the time of
such expiration or earlier termination of this Sublease as to such Site.

           9. PUT RIGHT.

In addition to and not in limitation of the provisions of SECTION 10 or 31(D),
BSPCI will have the Put Right, exercisable in its sole discretion, in respect of
any Site, at any time during the Term of this Sublease; provided, however, that
the number of Sites in respect of which BSPCI may exercise its Put Right over
the Term shall not exceed an aggregate of the greater of: (i) two (2%) of the
number of all Sites then and theretofore under this Sublease; or (ii) fifteen
(15) Sites. Notwithstanding the foregoing, BSPCI shall have no Put Right in
respect of any BTS Site within ten (10) years of the Site Commencement Date for
that BTS Site. To exercise any such Put Right, BSPCI shall give TowerCo not less
than six (6) months' prior written notice of such exercise (a "PUT NOTICE"). If
BSPCI exercises the Put Right as to any Site, then BSPCI's obligation to pay any
Site Maintenance Charge with respect to such Site shall terminate as of the Put
Date and the Put Date as to such Site shall be the date specified in the
applicable Put Notice. Not later than the Put Date of any Site, the applicable
BellSouth Entity shall vacate the Reserved Space of such Site if such Reserved
Space is occupied whereupon such BellSouth Entity's right to use the Reserved
Space of such Site shall be terminated. The applicable BellSouth Entity shall
assign to TowerCo all its interest in the Ground Lease as to such Site and any
Improvements thereon (other than any such BellSouth Entity Improvements that
such BellSouth Entity elects to retain and remove), subject to such BellSouth
Entity's receipt of any consent required for such assignment, whereupon such
BellSouth Entity shall be released from any and all further obligations under
such Ground Lease and under this Sublease in respect of such Site, including,
without limitation such BellSouth Entity's obligations to renew or extend the
Ground Lease and pay the Ground Rent with respect to such Site and TowerCo
hereby acknowledges and consents to such release. If the applicable BellSouth
Entity does not receive any such required consent, such Reserved Space shall be
deemed subleased to TowerCo pursuant to the terms of this Sublease, and shall be
added to the Subleased Property of such Site effective without further act of
the Parties; provided, however, that the Parties shall use reasonable efforts to
cause the Site Designation Supplement for such Site to be amended by a written
instrument in recordable form to reflect such sublease.

                                       21
<PAGE>

          10. WITHDRAWAL                      .

          (a) Notwithstanding anything to the contrary contained herein, and
without limiting the provisions of SECTION 9, BSPCI will have the Withdrawal
Right, exercisable in respect of any Site on the tenth anniversary of the Site
Commencement Date of such Site and on each five-year anniversary of such Site
Commencement Date thereafter.  To exercise any such Withdrawal Right, BSPCI
shall give TowerCo written notice of such exercise not less than ninety (90)
days, in the case of the exercise of a Withdrawal Right in respect of less than
twenty percent (20%) of all Sites now or hereafter under this Sublease and one
hundred eighty (180) days, in the case of the exercise of a Withdrawal Right in
respect of  twenty percent (20%) or more of all Sites now or hereafter under
this Sublease, prior to any such anniversary ("WITHDRAWAL NOTICE").  If BSPCI
exercises the Withdrawal Right as to any Site, then BSPCI's obligation to pay
any Site Maintenance Charge with respect to such Site shall terminate as of the
Withdrawal Date and the Withdrawal Date as to such Site shall be the date
specified in the applicable Withdrawal Notice.  Not later than the Withdrawal
Date of any Site, the applicable BellSouth Entity shall vacate the Reserved
Space of such Site if such Reserved Space is occupied and  shall assign to
TowerCo all its interest in the Ground Lease and any Improvements thereon (other
than such BellSouth Entity's Improvements that such BellSouth Entity elects to
retain and remove), subject to such BellSouth Entity's receipt of any consent
required for such assignment, whereupon such BellSouth Entity shall be released
from any and all further obligations under such Ground Lease and under this
Sublease in respect of such Site, including, without limitation such BellSouth
Entity's obligations to renew or extend the Ground Lease and pay the Ground Rent
with respect to such Site and TowerCo hereby acknowledges and consents to such
release.  If the applicable BellSouth Entity does not receive any such required
consent, such Reserved Space shall be deemed subleased to TowerCo pursuant to
the terms of this Sublease and shall be added to the Subleased Property of such
Site, effective without further act of the Parties; provided, however, that the
Parties shall use reasonable efforts to cause the Site Designation Supplement
for such Site to be amended by a written instrument in recordable form to
reflect such sublease.

          (b) In addition to and not in limitation of any right of BSPCI under
SECTION 10(A), each BellSouth Entity will have the right, exercisable at any
time during the Term of this Sublease, to cease occupying the Reserved Space of
any Site, and retain its right to such Reserved Space and may permit any
BellSouth Entity's Affiliate to occupy such Site, so long as BSPCI (i) has not
exercised its Put Right with regard to that Site pursuant to SECTION 9 and (ii)
continues to pay the Site Maintenance Charge in respect of such Site.

          (c) If BSPCI elects to assign, sublet, transfer or dispose of any
interest in any Reserved Space to or in favor of any Person (other than an
Affiliate of any BellSouth Entity), then, prior to such assignment, subletting,
transfer or disposition, BSPCI shall give TowerCo written notice of such
election ("DISPOSITION NOTIFICATION") and any such assignment, subletting or
disposal shall be subject to TowerCo's rights under SECTION 10(D).  If TowerCo
does not exercise its right to acquire any interest in such Reserved Space prior
to such assignment, subletting or disposition, then BSPCI may, at its option,
assign, sublet or dispose of such interest

                                       22
<PAGE>

in such Reserved Space or retain its interest in such Reserved Space, free of
any right of TowerCo to acquire any interest in the Reserved Space.

          (d) Notwithstanding anything to the contrary contained herein, TowerCo
will have the right and option, exercisable by written notice given to BSPCI at
any time (whether before or after such assignment) following BSPCI's giving of a
Disposition Notice as to any Reserved Space (regardless of whether such Reserved
Space has been assigned), to purchase from the applicable BellSouth Entity such
Reserved Space and all of such BellSouth Entity's retained rights in that Site
for consideration equal to:  (i) $5,000 (such amount to increase each calendar
year after 1999 by the amount of the CPI Increase), payable in immediately
available funds on the effective date of such sublease, plus (ii) the grant to
such BellSouth Entity of the right to receive thirty-five percent (35%) of all
Gross Revenues payable to TowerCo each year during the Term from any Person's
use or occupancy of such Reserved Space.  Upon exercise of such purchase right
by TowerCo, the applicable BellSouth Entity shall assign to TowerCo all its
interest in the Ground Lease and any Improvements thereon (other than any such
BellSouth Entity's Improvements that it elects to retain and remove), subject to
such BellSouth Entity's receipt of any consent required for such assignment,
whereupon such BellSouth Entity shall be released from any and all further
obligations under such Ground Lease and under this Sublease in respect of such
Site, including, without limitation its obligations to renew or extend the
Ground Lease and pay the Ground Rent with respect to such Site and TowerCo
hereby acknowledges and consents to such release.  If such BellSouth Entity does
not receive any such required consent, such Reserved Space shall be deemed
subleased to TowerCo pursuant to the terms of this Sublease and shall be added
to the Subleased Property of such Site, effective without further act of the
Parties; provided, however, that the Parties shall use reasonable efforts to
cause the Site Designation Supplement for such Site to be amended by a written
instrument in recordable form to reflect such sublease.  Upon any such
assignment or sublease, the applicable BellSouth Entity's obligations under this
Sublease in respect of such Reserved Space shall cease, including without
limitation, BSPCI's obligation to provide any alarm monitoring data feed.  Under
no circumstances will any BellSouth Entity be required to account for or pay to
TowerCo any amount received from any sublessee or other transferee of any
Reserved Space subleased or transferred upon the exercise of a Withdrawal
Notice, received prior to the date on which TowerCo exercised its rights under
this SECTION 10(D) in respect of such Reserved Space.  TowerCo will have no
obligation to lease any such Reserved Space to any third party.

          11. RENT.

          (a) TowerCo shall pay BSPCI monthly Rent in respect of the Subleased
Property of each Site, for each Site Term Year as provided in this SECTION 11.
Each month during the Term of this Sublease, the applicable Site Payment (as
defined below) shall be determined and paid pursuant to this SECTION 11.  If, as
to any month, the Aggregate Rent exceeds the Aggregate Site Maintenance Charge
(each as defined in SECTION 11(C)), TowerCo shall pay the amount of such excess
to BSPCI, at the address specified in this Sublease or at such other place as
BSPCI may specify in writing.  If, as to any month, the Aggregate Site
Maintenance Charge exceeds the Aggregate Rent, BSPCI shall pay the amount of
such excess to

                                       23
<PAGE>

TowerCo, at the address specified in this Sublease or at such other place as
TowerCo may specify in writing.

          (b) Any amount payable by TowerCo or BSPCI, as the case may be,
pursuant to SECTION 11(A) is referred to herein as a "SITE PAYMENT."  Each Site
Payment shall be due and payable, in advance, beginning on the date hereof and
continuing on the first day of each succeeding month thereafter throughout the
Term.

          (c) For purposes of calculating the Site Payment, the following terms
shall have the following definitions:

          "AGGREGATE RENT" means the aggregate amount of all Rents for the Sites
then subject to this Sublease, which shall be payable by TowerCo to BSPCI
pursuant to this Sublease;

          "AGGREGATE SITE MAINTENANCE CHARGE"  means, as to any month in any
Sublease Year, (i) the number of Sites subject to this Sublease multiplied by
the applicable Site Maintenance Charge, minus (ii) the aggregate amount of the
Reimbursable Maintenance Expenses (as defined in SECTION 30(A)), if any, minus
(iii) the aggregate amount of  unreimbursed Taxes and Assessments;

          "GROUND RENTS" means, as to any Site (other than an Owned Site), all
rents, fees and other charges payable by BSPCI or the Carolinas Partnership, as
applicable, to the Ground Lessor under the Ground Lease for such Site calculated
in accordance with SECTION 11(D);

          "RENT" means, (i) as to any Site other than Owned Sites, the amount of
all Ground Rents, and (ii) as to any Owned Site, $1.00;

          "SITE MAINTENANCE CHARGE" means as to any Site, in any Sublease Year,
an amount equal to $1,200 per month subject to an increase of the lesser of (x)
the applicable CPI Increase plus four percent (4%) or (y) five percent (5%) per
year (but never less than zero percent (0%)) on each anniversary of the
applicable Site Commencement Date, for each month in such Sublease Year,
representing a payment by BSPCI for services performed by TowerCo for the
benefit of BSPCI and the Carolinas Partnership pursuant to this Sublease.

          (d) If the Site Commencement Date for any Site is a day other than the
first day of a calendar month, the applicable Ground Rent and Site Maintenance
Charge for the period from such Site Commencement Date through the end of the
calendar month during which such Site Commencement Date occurs shall be prorated
on a daily basis, and shall be included in the calculation of the Ground Rent or
Site Maintenance Charge, as the case may be, for the first full calendar month
of the Term, on the first day of the first calendar month following such Site
Commencement Date.

          (e) On each anniversary of the date hereof, and from time to time upon
BSPCI's request, within ten (10) days after BSPCI's giving of such request,
TowerCo shall

                                       24
<PAGE>

deliver a certificate duly executed by an officer of TowerCo certifying, as of
the date of such certificate, the calculation of the aggregate amount of the
Site Payment for such Sublease Year. BSPCI shall have the right (i) to request
any substantiation of any such certification and TowerCo shall provide BSPCI
with such substantiation within ten (10) days after such request, and (ii) to
audit the books and records of TowerCo relating to each Site from time to time
during normal business hours to determine the accuracy of any such certificate
and calculation of the Site Payment. BSPCI shall notify TowerCo in writing of
any dispute it may have with TowerCo relating to any such calculation, not later
than thirty (30) days after its receipt of such certificate and the Parties
shall resolve such dispute within ten (10) days thereafter. Notwithstanding
anything to the contrary contained herein, at any time and from time to time at
BSPCI's request, but not less than each calendar month, TowerCo shall provide
BSPCI sufficient back up information necessary to determine whether the
calculation of the Site Payment as to each Site is accurate. If TowerCo fails to
supply BSPCI with such information as to any Site, the Site Maintenance Charge
for such Site shall be deemed not to exceed the amount of the Ground Rent for
such Site; provided, however, that upon submission of such information by
TowerCo, BSPCI shall be liable to TowerCo for the outstanding amount of the Site
Maintenance Charge applicable to such Site and shall reimburse TowerCo for any
amount such Entity may owe to TowerCo.

          (f) TowerCo's covenant to pay Rent in respect of the Subleased
Property of each Site hereunder is independent of any other covenant, condition,
provision or agreement of this Sublease and all payments of Rent shall be
payable without previous demand therefor and without any right of abatement,
setoff or deduction, counterclaim, or suspension, and in case of nonpayment of
any Rent with respect to the Subleased Property of any Site by TowerCo when the
same is due, BSPCI shall have, in addition to all its other rights and remedies,
all of the rights and remedies available to BSPCI under the provisions of this
Sublease or at law or in equity in the case of nonpayment of Rent.  The
performance and observance by TowerCo of all the terms, covenants, conditions
and agreements to be performed or observed by TowerCo hereunder shall be
performed and observed by TowerCo at TowerCo's sole cost and expense.  TowerCo
shall pay a late charge of five percent (5%) of any monthly Rent payable by
TowerCo under the provisions of this Sublease, which shall be paid within ten
(10) days after the date the same is due; provided, however, that the late
charge shall not be assessed in respect of the first late payment occurring in
any twelve (12) month period.  In addition to and not in limitation of the
foregoing, Rent not paid on or before the due date in respect of the Subleased
Property of any Site shall be subject to a late charge equal to the amount of
any interest or fees that would be payable by the applicable BellSouth Entity if
such BellSouth Entity were to make a late payment under the applicable Ground
Lease.

          (g) BSPCI shall pay a late charge of five percent (5%) of any Site
Payment payable by BSPCI under the provisions of this Sublease, which shall be
paid within ten (10) days after the date the same is due; provided, however,
that the late charge shall not be assessed in respect of the first late payment
occurring in any twelve (12) month period.  Notwithstanding the foregoing, if
BSPCI fails to pay any portion of a Site Payment because BSPCI, acting in good
faith, reduced the amount of Site Maintenance Charges payable to TowerCo due to
a mistaken belief that it was entitled to Reimbursable Maintenance Expenses
under SECTION 30(A), no late charge shall be payable in respect thereof.

                                       25
<PAGE>

          (h) Notwithstanding anything to the contrary contained herein, if
after the tenth (10th) anniversary of each Site Designation Supplement, the then
current Site Maintenance Charge payable by BSPCI to TowerCo with respect to any
Site is below the market rate agreed upon by the Parties at the time of
determination, then such Site Maintenance Charge shall automatically be
increased on such anniversary and on each anniversary thereafter, based on the
CPI Increase effective as of date of such anniversary.  If, however, the then
Site Maintenance Payment with respect to such Site is above the market rate,
then such Site Maintenance Charge shall be automatically reset at ninety percent
(90%) of such agreed upon market rate effective as of date of such tenth (10th)
anniversary of the Site Designation Supplement and shall increase on each
following anniversary at the then current annual market rate of increase for
comparable properties.  Notwithstanding anything to the contrary contained
herein, the Parties shall agree as to the market rate not later than sixty (60)
days prior to such tenth anniversary of the applicable Site Designation
Supplement.  If the Parties are unable to agree upon the market rate, then BSPCI
shall have an option, exercisable by written notice to TowerCo, to: (i) refer
such dispute to arbitration pursuant to SECTION 38(E) hereof, or (ii) exercise
its Withdrawal Right in accordance with SECTION 10(A).  Notwithstanding anything
to the contrary contained herein, the provisions of this SECTION 11(H) with
respect to all BTS Sites shall apply on the tenth (10th) anniversary of June 1,
2001, rather than the tenth (10th) anniversary of the Site Designation
Supplement.

          (i)  (i)  Subject to SECTION 11(I)(II) below, if the Annual Gross
Revenues for a Sublease Year in respect of any individual Site exceeds $60,000,
then the Site Maintenance Charge in respect of such Site shall be reduced by an
amount (the "SITE REDUCTION AMOUNT") equal to twenty percent (20%) of the amount
by which the Annual Gross Revenues exceed $60,000, such $60,000 amount being
increased from and after the fifth Sublease Year at a rate of 3% per annum.  The
Site Maintenance Charge shall be reduced each month pursuant to this SECTION
11(I)(I) in the next subsequent Sublease Year by an amount equal to one-twelfth
of the Site Reduction Amount for the immediately preceding Sublease Year;
provided, however, that under no circumstances will the Site Maintenance Charge
for any Site be reduced to an amount below zero.

          (ii) If the Annual Gross Revenues averaged over the average of the
number of Sites for any Sublease Year exceeds $56,000, then the Aggregate Site
Maintenance Charge shall be reduced by an amount (the "OVERALL REDUCTION
AMOUNT") equal to (x) the average of the number of Sites during such Sublease
Year, multiplied by (y) twenty-five percent (25%) of the amount by which the
average Annual Gross Revenues exceed $56,000, such $56,000 amount being
increased from and after the fifth Sublease Year at a rate of 3% per annum;
provided, however, that (A) if during any Sublease Year, the aggregate Site
Reduction Amount exceeds the Overall Reduction Amount, the provisions of SECTION
11(I)(I) shall apply or (B) if during any Sublease Year, the Overall Reduction
Amount exceeds the aggregate Site Reduction Amount, as to any individual Site
where the Site Reduction Amount exceeds the average Overall Reduction Amount,
the provisions of SECTION 11(I)(I) shall apply to such Site, the applicable
BellSouth Entity shall receive the benefit of such Site Reduction Amount, the
amount of any such benefit shall be subtracted from the Overall Reduction Amount
and the balance, if any, remaining, shall be applied pursuant to this SECTION
11(I)(II) to the other Sites by

                                       26
<PAGE>

dividing the balance by the number of such other Sites. Any average number of
Sites determined under this SECTION 11(I)(II) shall be calculated by adding the
number of Sites as of the last day of each calendar month in such Sublease Year
and dividing such sum by twelve (12). The Aggregate Site Maintenance Charge
shall be reduced each month pursuant to this SECTION 11(I)(II) in the next
subsequent Sublease Year by an amount equal to one-twelfth of the Overall
Reduction Amount for the immediately preceding Sublease Year; provided, however,
that under no circumstances will the Site Maintenance Charge for any Site be
reduced to an amount below zero.

          For purposes of this SECTION 11, the following terms shall have the
following definitions:

          "ANNUAL GROSS REVENUES" means, as to any Site, the Gross Revenues in
respect of such Site in a Sublease Year.

          "GROSS REVENUES," as to each Site in any Sublease Year, shall be equal
to the sum of:  (i) an aggregate amount of Space Subtenant Rents payable by all
Space Subtenants on such Site in respect of such Sublease Year; plus (ii) the
Site Maintenance Charge payable by BSPCI with respect to the Reserved Space of
such Site in respect of any Sublease Year.

          "SPACE SUBTENANT RENT," as to each Site, shall be the amount of the
rent and other amounts payable each month for the use or occupancy by a Space
Subtenant of any Available Space on any Site pursuant to a lease, sublease,
license or other possessory interest or right obtained from TowerCo, including
without limitation any ongoing monthly payments for the use or occupancy of such
Available Space, however characterized.  For the purpose of calculating Gross
Revenues, any "bolt-on fees" and other up-front payments by such third party
("UP-FRONT PAYMENTS") shall be deemed to have occurred on a straight-line basis
over 120 months, commencing on the first day of the next month following the
month in which the Up-front Payment was made.  Separately charged and stated
payments for installation or construction services rendered by TowerCo to such
Space Subtenant for such Site, valued on the basis of the fair market value of
such services, shall be excluded from the calculation of Gross Revenues.

          12.  CONDITION OF THE SITES AND OBLIGATIONS OF TOWERCO.

          (a) TowerCo acknowledges that, as between TowerCo and the applicable
BellSouth Entity, in respect of  each Site, TowerCo has the obligation, right
and responsibility to repair and maintain such Site, including without
limitation, an obligation to monitor each Tower to maintain the structural
integrity of the Tower and the ability of the Tower to hold and support all
Communications Equipment then mounted on the Tower, in accordance with standard
industry practices.  Subject to the other provisions contained in this Sublease,
TowerCo, at its sole cost and expense, except if such cost or expense arises out
of a negligent or wrongful act or omission of the applicable BellSouth Entity,
shall monitor, maintain and repair each Site such that each BellSouth Entity and
Space Subtenants may utilize such Site to the extent permitted

                                       27
<PAGE>

herein, including, without limitation, each Tower lighting system (to the extent
required by applicable Law) and markings and the structural integrity of each
Tower. Installation, maintenance and repair of each Site must comply with all
Laws applied in a manner consistent with standard industry practices. TowerCo's
duties include, without limitation, subject to the other provisions contained in
this Sublease, maintenance of appropriate records and notification to the FAA of
any failure on TowerCo's part and repairs and correction of same. TowerCo
assumes all responsibilities, as to each Site, for any fines, levies, and/or
other penalties imposed as a result of non-compliance with said requirements of
said authorities. TowerCo shall maintain and repair each Site, and cause Space
Subtenants to maintain and repair all Communications Equipment on each Site, in
accordance with the requirements of this Sublease including without limitation
as set forth in EXHIBIT C; provided, however, that nothing in this Sublease
shall require TowerCo to maintain BellSouth Entity's Communications Equipment.

          (b) For each Site, TowerCo, at its sole cost and expense, shall obtain
all of the certificates, permits, and other approvals which may be required from
any federal, state, or local authority and/or any easements or consents which
are required from any third parties with respect to its operation of such Site,
including the lighting system serving such Site.  Each BellSouth Entity shall
cooperate with TowerCo in connection therewith, as contemplated by SECTION 18.
Nothing in this Sublease shall require TowerCo to obtain any certificate, permit
or other approval relating specifically and only to BellSouth Entity's
Communications Equipment.  If, as to any Site, or any portion thereof, any
certificate, permit, license, easement, or approval relating to the operation of
such Site is canceled, expires, lapses, or is otherwise withdrawn or terminated
or, if due to technological changes or if TowerCo has breached its obligation
under this SECTION 12(B), then BSPCI shall have the right, in addition to its
other remedies pursuant to this Sublease, at law, or in equity, to take
appropriate action to remedy any such noncompliance and invoice TowerCo, and/or
to terminate such this Sublease as to such Site subject to SECTIONS 30 and 31.

          (c) For each Site, TowerCo agrees to monitor the lighting system
serving such Site and will notify the appropriate FAA service office of any
lighting failure within thirty (30) minutes of discovering such failure.  In
addition, TowerCo agrees, as soon as practicable, to begin a diligent effort to
repair the failed lighting on an Emergency basis, and to notify BSPCI upon
successful completion of the repair.  Notwithstanding anything to the contrary
contained in SECTION 31, TowerCo's failure to successfully repair the lighting
system within the Lighting Repair Period (as hereinafter defined) constitutes
default by TowerCo under this Sublease.  "LIGHTING REPAIR PERIOD" means as to
any lighting system failure, a period beginning on the date of such failure and
ending two (2) Business Days prior to (i) the fifteenth (15th) day following the
date of such failure, or (ii) the expiration of any extension period approved by
the FAA, provided that in no event shall the Lighting Repair Period extend
beyond two (2) Business Days prior to the last date under applicable FAA
regulations (including any FAA extension) by which a lighting repair must be
made, whether longer or shorter than fifteen (15) calendar days after the date
of such failure.  Promptly after receiving any extension from the FAA of any
Lighting Repair Period, Crown shall give an appropriate BSPCI representative
telephonic notice thereof, followed promptly thereafter with a copy to BSPCI of
such extension or other evidence of the extension.  Notwithstanding anything to
the contrary contained herein, if TowerCo fails to

                                       28
<PAGE>

repair any failed lighting pursuant to this SECTION 12(C), then TowerCo agrees
to indemnify, defend and hold each BellSouth Entity Indemnitee harmless from and
against any Claims arising out of or by reason of TowerCo's failure to comply
with the provisions of this SECTION 12(C). In addition to and not in limitation
of SECTIONS 31(D) and (E), if TowerCo defaults under this SECTION 12(C), BSPCI,
in addition to its other remedies pursuant to this Sublease, at law, or in
equity, may either elect to take appropriate action to repair or replace lights
and invoice TowerCo, or terminate this Sublease as to such Site [in the event]
that such default is not cured within the aforementioned. Without in any way
affecting TowerCo's obligations relating to lighting: (i) in order to
accommodate TowerCo's needs during the transition period, BSPCI agrees to
monitor the lighting system serving the Towers or the Improvements of the Sites
from the respective dates of the Site Designation Supplements until the
expiration of four (4) calendar months after the applicable Closing Date (as
defined in the Agreement to Sublease); (ii) BSPCI shall have the right, at its
expense, to install and maintain equipment for the purpose of monitoring (x) the
lighting system serving the Tower or the Improvements of each Site, and/or (y)
any device of TowerCo's used to monitor the lighting system serving each Tower;
and (iii) TowerCo shall have the right, at its expense, to install and maintain
equipment for the purpose of monitoring any device of BSPCI used to monitor the
lighting system servicing any Tower. At TowerCo's election, BSPCI shall (i)
provide TowerCo a data feed for a fee and on terms to be agreed (x) from all
appropriate security monitoring devices now at the Tower (it being understood
that these devices will be leased or subleased to TowerCo with each Tower, and
that TowerCo will be responsible for the repair and maintenance of the devices
and their wiring up to the point of hand-off to BSPCI's T1 at the Site) and (y)
from any additional devices which TowerCo wishes to install, at TowerCo's sole
cost and expense; (ii) permit TowerCo access to the contact point box at each
Tower where TowerCo may install, at TowerCo's sole cost and expense, its own
direct links to such devices; or (iii) permit TowerCo, where available, access
to the contact point for each Tower through BSPCI's regional switching (it being
understood that TowerCo shall be responsible for providing its own dedicated
telephone lines to the Site, that these monitoring devices will generally be
subleased to TowerCo with each Tower, and that TowerCo will be responsible for
the repair and maintenance of the devices and their wiring up to the point of
hand-off to TowerCo's dedicated lines).

          13.  WORK ON THE SITE.  (a)  Title to all Alterations shall vest in
the applicable BellSouth Entity immediately upon construction or installation
on, or affixation or annexation to, the Site.

          (b) Whenever TowerCo is permitted or required to make Alterations to
any Site; construct, replace, maintain or repair the Tower and Improvements of
any Site; install, maintain or repair, or cause Space Subtenants to install,
maintain or repair, any Communications Equipment; or reconstruct or restore,
Subleased Property (hereinafter called the "TOWERCO WORK"), the following
provisions shall apply:

               (i) No TowerCo Work shall be commenced until TowerCo has obtained
     all certificates, licenses, permits, authorizations, consents and approvals
     necessary for the TowerCo Work, from all governmental authorities having
     jurisdiction with respect to any Site or the TowerCo Work, and BSPCI, at

                                       29
<PAGE>

     TowerCo's sole cost and expense, shall reasonably cooperate with TowerCo in
     obtaining any such certificate, license, permit, authorization, consent or
     approval.

               (ii) TowerCo shall commence and perform the TowerCo Work in
     accordance with standard operating procedures agreed upon by the parties
     substantially in the form of EXHIBIT D attached hereto ("STANDARD
     PROCEDURES").

               (iii)  TowerCo shall cause the TowerCo Work to be done and
     completed with industry standard materials and in a good, substantial and
     workmanlike manner, free from faults and defects, and in compliance with
     all Laws, and shall utilize only industry standard materials and supplies.
     TowerCo shall be solely responsible for construction means, methods,
     techniques, sequences and procedures, and for coordinating all activities
     related to the TowerCo Work, and BSPCI shall have no duty or obligation to
     inspect the TowerCo Work, but shall have the right to do so, at reasonable
     times, upon reasonable prior notice and in a reasonable manner.

               (iv) TowerCo shall promptly commence the TowerCo Work and, once
     commenced, diligently and continually pursue the TowerCo Work and complete
     the TowerCo Work within a reasonable time.  TowerCo shall supervise and
     direct the TowerCo Work utilizing commercially reasonable efforts and
     reasonable care, and shall assign such qualified personnel to the TowerCo
     Work as may be necessary to cause the TowerCo Work to be completed in an
     expeditious fashion.

               (v) All TowerCo Work shall be performed at TowerCo's sole cost
     and expense.  TowerCo shall provide and pay for all labor, materials,
     goods, supplies, equipment, appliances, tools, construction equipment and
     machinery and other facilities and services necessary for the proper
     execution and completion of the TowerCo Work.  TowerCo shall promptly pay
     when due all costs and expenses incurred in connection with the TowerCo
     Work. TowerCo shall pay, or cause to be paid, all fees and taxes required
     by law in connection with the TowerCo Work.

               (vi) TowerCo shall be responsible for the acts and omissions of
     all of its employees, contractors, subcontractors, engineers, agents,
     representatives, advisors and all other persons performing any of the
     TowerCo Work.  TowerCo shall be responsible for initiating, maintaining and
     supervising all necessary safety precautions and programs in connection
     with the TowerCo Work, and shall take all reasonable protection to prevent
     damage, injury or loss to, the TowerCo Work, all persons performing TowerCo
     Work on the Site, all other persons who may be involved in or affected by
     the TowerCo Work, all materials and equipment to be incorporated in the
     TowerCo Work, Tower and Improvements of such Site.

                                       30
<PAGE>

               (vii)  TowerCo shall procure and maintain in full force and
     effect, and shall cause its contractors and subcontractors to procure and
     maintain in full force and effect, with respect to the TowerCo Work:  (x)
     full replacement cost "all-risk", "builder's risk" insurance, insuring the
     TowerCo Work; and (y) the other types of insurance required to be
     maintained pursuant to SECTION 24 of this Sublease. Such additional
     insurance policies shall meet the requirements set forth elsewhere in this
     Sublease with respect to the insurance policies otherwise required to be
     obtained and maintained by TowerCo under this Sublease.

          (c) Whenever BSPCI is permitted or required to construct, maintain and
repair the Reserved Space of any Site or reconstruct or restore, its
Communications Equipment (hereinafter called the "BSPCI WORK"), the following
provisions shall apply:

               (i) No BSPCI Work shall be commenced until BSPCI has obtained all
     certificates, licenses, permits, authorizations, consents and approvals
     necessary for the BSPCI Work, from all governmental authorities having
     jurisdiction with respect to any Site or the BSPCI Work, and TowerCo,
     BSPCI's  sole cost and expense, shall reasonably cooperate with BSPCI in
     obtaining any such certificate, license, permit, authorization, consent or
     approval.

               (ii) BSPCI shall commence and perform the BSPCI Work in
     accordance with the Standard Procedures.

               (iii)  BSPCI shall cause the BSPCI Work to be done and completed
     with industry standard materials and in a good, substantial and workmanlike
     manner, free from faults and defects, and in compliance with all Laws, and
     shall utilize only industry standard materials and supplies.   BSPCI shall
     be solely responsible for construction means, methods, techniques,
     sequences and procedures, and for coordinating all activities related to
     the BSPCI Work, and TowerCo shall have no duty or obligation to inspect the
     BSPCI Work, but shall have the right to do so, at reasonable times, upon
     reasonable prior notice and in a reasonable manner.

               (iv) BSPCI shall promptly commence the BSPCI Work and, once
     commenced, diligently and continually pursue the BSPCI Work and complete
     the BSPCI Work within a reasonable time.  BSPCI shall supervise and direct
     the BSPCI Work utilizing commercially reasonable efforts and reasonable
     care, and shall assign such qualified personnel to the BSPCI Work as may be
     necessary to cause the BSPCI Work to be completed in an expeditious
     fashion.

               (v) All BSPCI Work shall be performed at BSPCI's sole cost and
     expense. BSPCI shall provide and pay for all labor, materials, goods,
     supplies, equipment, appliances, tools, construction equipment and
     machinery and other facilities and services necessary for the proper
     execution and completion of the BSPCI Work.  BSPCI shall promptly pay when
     due all costs and expenses

                                       31
<PAGE>

     incurred in connection with the BSPCI Work. BSPCI shall pay, or cause to be
     paid, all fees and taxes required by law in connection with the BSPCI Work.

               (vi) BSPCI shall be responsible for the acts and omissions of all
     of its employees, contractors, subcontractors, engineers, agents,
     representatives, advisors and all other persons performing any of the BSPCI
     Work.  BSPCI shall be responsible for initiating, maintaining and
     supervising all necessary safety precautions and programs in connection
     with the BSPCI Work, and shall take all reasonable protection to prevent
     damage, injury or loss to, the BSPCI Work, all persons performing the BSPCI
     Work on the Site, all other persons who may be involved in or affected by
     the BSPCI Work, all materials and equipment to be incorporated in the BSPCI
     Work, Tower and Improvements of such Site.

               (vii)  BSPCI shall procure and maintain in full force and effect,
     and shall cause its contractors and subcontractors to procure and maintain
     in full force and effect, with respect to the BSPCI Work: (x) full
     replacement cost "all-risk", "builder's risk" insurance, insuring the BSPCI
     Work; and (y) the other types of insurance required to be maintained
     pursuant to SECTION 24 of this Sublease.  Such additional insurance
     policies shall meet the requirements set forth elsewhere in this Sublease
     with respect to the insurance policies otherwise required to be obtained
     and maintained by BSPCI under this Sublease.

          14.  DAMAGE TO THE SITE, TOWER OR THE IMPROVEMENTS  .

          (a) As to each Site, if such Site (including the Tower and
Improvements thereon) are damaged for any reason so as to render such Subleased
Property substantially unusable for the Permitted Use, TowerCo, at its sole cost
and expense, shall promptly and diligently proceed with the adjustment of
TowerCo's insurance Claims in respect thereof within a period of six (6) months
after the date of the damage and, thereafter, if and to the extent required by
this SECTION 14, promptly commence, and diligently prosecute to completion, the
Restoration, repair, replacement and rebuilding of the same.  The Restoration
shall be carried on and completed in accordance with the provisions and
conditions of this SECTION 14.

          (b) All Proceeds shall be held by TowerCo for the mutual benefit of
TowerCo and BSPCI on account of such damage, shall be applied to the payment of
the costs of the Restoration and shall be paid out from time to time as the
Restoration progresses. Any portion of the Proceeds applicable to a particular
Site remaining after final payment has been made for work performed on such Site
shall be retained by and be the property of TowerCo.  If the cost of Restoration
exceeds the Proceeds, TowerCo shall pay the excess cost.

          (c) No damage to any Site (including the Tower and Improvements
thereon), or any portion thereof, by fire, casualty or otherwise shall permit
TowerCo to terminate this Sublease as to the affected Site or shall relieve
TowerCo from its liability to pay to BSPCI the Rent payable under this Sublease
with respect to the Subleased Property of  such Site or from any of its other
obligations under this Sublease, and TowerCo waives any rights now or hereafter

                                       32
<PAGE>

conferred upon TowerCo by present or future law or otherwise to quit or
surrender this Sublease, the applicable Site Designation Supplement or the
Subleased Property, or any portion thereof, to any BellSouth Entity or to any
suspension, diminution, abatement or reduction of the applicable Rent on account
of any such damage.  Without limiting TowerCo's obligations hereunder in respect
of a Site subject to a casualty, TowerCo shall make available to BSPCI a portion
of the Subleased Property of such Site for the purpose of BSPCI locating a
temporary communications facility, such as a "cell on wheels", and shall give
BSPCI priority over Space Subtenants at such Site as to the use of such portion;
provided, however, that:  (i) the placement of such temporary communications
facility does not interfere in any material respect with TowerCo's Restoration
and repair of such Improvements; (ii) BSPCI obtains any permits and approvals,
at its cost, required for the location of such temporary communications facility
on such Site; and (iii) there is available space on the Site for placing such
temporary communications facility.

          (d) The foregoing provisions of this SECTION 14 apply only to damage
of each Site by fire, casualty or other cause occurring after the applicable
Site Commencement Date.

          (e) If any BellSouth Entity damages any Site as a result of such
BellSouth Entity's negligent or wrongful act or omission, or failure to perform
its obligations under this Sublease, such BellSouth Entity will, at its sole
expense, promptly repair and restore the Subleased Property of such Site to its
respective conditions prior to such damage.  If any BellSouth Entity fails to
perform any such obligation under this SECTION 14(E), TowerCo shall have the
right to perform such obligation on behalf of such BellSouth Entity, pursuant to
and in accordance with SECTION 30(B).

          (f) If TowerCo fails to complete the Restoration of the Subleased
Property of any Site required under this Sublease within two (2) months after
the date of the damage, BSPCI may terminate this Sublease as to the applicable
Site upon giving TowerCo written notice of its election to terminate within
fifteen (15) days following the expiration of such time period; provided,
however, that if TowerCo's failure to complete such Restoration within such two
(2)-month period is caused by:  (i) failure to obtain a new permit; or (ii)
TowerCo's inability to have access to the affected Site, such 2-month period
shall be extended accordingly in order to allow TowerCo to complete the
Restoration.

          15. SPACE SUBTENANTS; INTERFERENCE.

          (a) TowerCo acknowledges and agrees that TowerCo will not permit the
addition of any Space Subtenants (other than BSPCI in respect of any Available
Space) at the Subleased Property of any Site to adversely affect any Reserved
Space and its operation, use or enjoyment of such Reserved Space on any Site,
taking into account customary and commercially reasonable practices for multi-
tenant wireless communication sites and towers thereon.

          (b) TowerCo shall not and shall not permit any Space Subtenants (other
than  BSPCI in respect of any Available Space) on the Subleased Property of any
Site to (i) install or change, alter or improve the frequency, power, or type of
the Communications Equipment that interferes with the operation of the Reserved
Space of such Site or is not authorized by Laws or

                                       33
<PAGE>

is not made or installed in accordance with good engineering practices; or (ii)
implement a configuration which interferes with the operation of the applicable
BellSouth Entity's Communications Equipment on such Site or the Reserved Space
thereof.

          (c) In the event of any interference occurring as a result of actions
of TowerCo or Space Subtenants described in SECTIONS 15(B) above as to the
Subleased Property of any Site, TowerCo shall be responsible for coordinating
and resolving any such interference problems caused by TowerCo or Space
Subtenants (other than BSPCI in respect of any Available Space), including,
without limitation, using its best efforts to correct and eliminate the
interference within forty-eight (48) hours of receipt of notification from BSPCI
and perform interference study in accordance with the procedures set forth in
SCHEDULE 15.  If the interference cannot be corrected or eliminated within such
48-hour period, TowerCo shall cause, at TowerCo's option, any of TowerCo's or
Space Subtenants' (other than BSPCI in respect of any Available Space)
Communications Equipment or Communications Facility that interferes with the
operation of BSPCI's Communications Facility or the Reserved Space, authorized
frequency spectrum or signal strength, to be immediately powered down or turned
off, with the right to turn such interfering equipment or facility back up or on
only during off-peak hours specified by BSPCI in order to determine whether such
interference continues or has been eliminated; provided, however, that if any
interference continues at the time the interfering equipment is powered down,
the Communications Equipment that interferes with the operation of the
applicable BellSouth Entity's Communication Facility or Reserved Space shall be
turned off.  If TowerCo or any Space Subtenant (other than BSPCI in respect of
any Available Space) cannot correct or eliminate, to the satisfaction of BSPCI,
such interference within twenty (20) days of receipt of written notice from
BSPCI, TowerCo shall or shall cause such Space Subtenant (other than  BSPCI in
respect of the Available Space) to cease the operations of the objectionable
Communications Equipment and to stop providing services from the applicable
Communication Facility or the Subleased Property of the applicable Site in its
entirety until the interference problems are resolved.

          (d) No BellSouth Entity shall:  (i) install or change, alter or
improve the frequency, power, or type of the Communications Equipment in a
manner that interferes with the operation of TowerCo's or any Space Subtenant's
Communications Equipment on a Site or is not authorized by Law or is not made or
installed in accordance with good engineering practices; or (ii) implement a
configuration which interferes with the operation of TowerCo's or any Space
Subtenant's Communications Equipment on such Site.

          (e) In the event of any interference occurring as a result of actions
of any BellSouth Entity described in SECTION 15(D) above as to any Site, BSPCI
shall be responsible for coordinating and resolving any such interference
problems caused by such BellSouth Entity, including, without limitation, using
its best efforts to correct and eliminate the interference within forty-eight
(48) hours of receipt of notification from TowerCo.  If the interference cannot
be corrected or eliminated within such 48-hour period, BSPCI shall cause, at
BSPCI's option, any Communications Equipment or Communications Facility that
interferes with the operation of TowerCo's or any Space Subtenant's
Communications Facility's authorized frequency spectrum or signal strength, to
be immediately powered down or turned off, with the right to turn

                                       34
<PAGE>

such interfering equipment or facility back up or on only during off-peak hours
specified by TowerCo or the affected Space Subtenant in order to determine
whether such interference continues or has been eliminated; provided, that if
any interference continues at the time the interfering equipment is powered
down, the Communications Equipment that interferes with the operation of TowerCo
or any Space Subtenant Communication Facility shall be turned off. If BSPCI
cannot correct or eliminate, to the satisfaction of TowerCo or the affected
Space Subtenant, such interference within twenty (20) days of receipt of written
notice from TowerCo, the applicable BellSouth Entity shall cease the operations
of the objectionable Communications Equipment and stop providing services from
the applicable Communications Facility or the Subleased Property of the
applicable Site in its entirety (including the Tower and Improvements) until the
interference problems are resolved.

          (f) Notwithstanding anything in this SECTION 15 to the contrary, in
the event any interference occurs in respect of a Site and the source of such
interference is not readily determinable, it shall be assumed that TowerCo or a
Space Subtenant and not the BellSouth Entity is the cause of such interference,
TowerCo shall be responsible for the performance of its obligations under
SECTION 15(C) in respect of such interference, and the BellSouth Entity shall be
relieved of any obligations under SECTION 15(E) in respect of such interference,
unless and until it is determined that the BellSouth Entity is the cause of such
interference.

          16. TAXES AND ASSESSMENTS.

          (a) TowerCo is responsible for the payment of, as and when they shall
become due and payable, all Taxes and Assessments as to each Site, for each Site
Term Year during the term of this Sublease as to such Site.

          (b) BSPCI shall pay all Taxes and Assessments with respect to the
Sites, and TowerCo shall reimburse BSPCI not later than thirty (30) days after
BSPCI delivers a copy of a notice setting forth the allocation with respect to
Taxes and Assessments to TowerCo.  Notwithstanding anything to the contrary
contained herein, the Parties agree that all Taxes and Assessments due and
payable by TowerCo hereunder, may be included at BSPCI's sole option and
discretion exercisable upon written notice to TowerCo, into the calculation of
the Aggregate Site Maintenance Charge.

          17. UTILITIES.

          Prior to the Site Commencement Date as to each Site, TowerCo shall
make all arrangements for, and thereafter shall pay, or cause to be paid, when
due all charges for connection of all utilities and services to such Site,
including, but not limited to, electricity, telephone, power, and other utility
used or consumed by the applicable BellSouth Entity occupying the Reserved Space
and all Space Subtenants of such Site. As among each BellSouth Entity and all
Space Subtenants, TowerCo shall cause utility charges to be separately metered,
and each BellSouth Entity shall be separately responsible for its own utility
charges.

          18.   GOVERNMENTAL APPROVALS.

          (a) In addition to and not in limitation of the provisions of SECTION
13(A) of this Sublease, TowerCo shall, at its own cost and expense, obtain and
maintain in effect all certificates, permits, licenses and other approvals and
to comply with all Laws, required or

                                       35
<PAGE>

imposed by governmental authorities, in connection with operation and
maintenance of the Subleased Property of each Site (including Tower and
Improvements thereon), including, without limitation, zoning Laws and FAA
regulations.

          (b) TowerCo shall cooperate with each BellSouth Entity in its efforts
to obtain and maintain in effect all certificates, permits, licenses and other
approvals and to comply with all Laws required or imposed by governmental
authorities, including, without limitation, the FCC and FAA, applicable to the
Reserved Space of each Site.

          (c) In addition to and not in limitation of the provisions of SECTION
13(C) of this Sublease, each BellSouth Entity shall, at its own cost and
expense, obtain and maintain in effect all certificates, permits, licenses and
other approvals and to comply with all Laws, required or imposed by governmental
authorities, in connection with operation and maintenance of the Reserved Space
of each Site, including, without limitation, FAA regulations.

          (d) Each BellSouth Entity shall cooperate with TowerCo in TowerCo's
efforts to obtain and maintain in effect all certificates, permits, licenses and
other approvals and to comply with all Laws required or imposed by governmental
authorities, including, without limitation, the FCC and FAA, applicable to each
Site.

          19.  NO LIENS.

          (a) TowerCo shall not create or permit any Lien against any Site, or
any part thereof. If any Lien (other than Permitted Liens) is filed against all
or any part of any Site, TowerCo shall cause the same to be discharged by
payment, satisfaction or posting of bond within thirty (30) days after TowerCo
has obtained knowledge of such Lien.  If TowerCo fails to cause any Lien (other
than Permitted Liens) to be discharged within the permitted time, BSPCI may
cause it to be discharged and may pay the amount of such Lien in order to do so.
If BSPCI makes any such payment, all amounts paid by BSPCI shall be payable by
TowerCo to BSPCI upon demand.  "PERMITTED LIENS" means, as to each Site:  (i)
Permitted Subleasehold Mortgages of TowerCo's Subleasehold Estate in such Site,
Tower or Improvements thereof; (ii) Space Subtenants' sublease interests in the
Subleased Space of such Site; (iii) Liens existing on the date of the Site
Designation Supplement for such Site; and (iv) Liens arising by, through or
under BSPCI or any other occupant of the Reserved Space.

          (b) TowerCo may, at TowerCo's sole cost and expense, in its own name
and on its own behalf or in the name of and on behalf of the applicable
BellSouth Entity, in good faith, contest any claim of Lien and, in the event of
any such contest, may permit such claim of Lien so contested to remain unpaid,
unsatisfied and undischarged during the period of such contest and any appeal
therefrom; provided, however, that, if any Site, the Subleased Property of any
Site or any part thereof are subject to imminent danger of loss or forfeiture by
virtue of or by reason of such claim of Lien, such claim of Lien shall be
complied with forthwith or TowerCo shall deposit with BSPCI a sum of money
reasonably required by BSPCI as security to protect the Subleased Property of
such Site from any such loss or forfeiture.  The applicable BellSouth

                                       36
<PAGE>

Entity, at the sole cost and expense of TowerCo, shall cooperate fully with
TowerCo in any such contest.

          (c) Any Permitted Subleasehold Mortgage and all rights acquired by any
Permitted Subleasehold Mortgagee shall be subject to each and every term,
covenant, condition, agreement, requirement, restriction and provision set forth
in this Sublease and subject to all rights, title and interest of the BellSouth
Entities.

          (d) Within ten (10) days after the granting of any Permitted
Subleasehold Mortgage, TowerCo shall deliver to BSPCI a true, correct and fully
executed copy of all documents pertaining thereto and the indebtedness secured
thereby.  Promptly upon TowerCo's receipt of copies of recorded documents
evidencing the recordation thereof and bearing the recording information
therefor, TowerCo shall deliver to BSPCI a copy of such recorded documents.

          (e) Each BellSouth Entity shall execute any necessary easement or
right of way for utilities for any Site promptly following any request by
TowerCo, provided such easement or right of way does not have an adverse effect
on such BellSouth Entity's use or enjoyment of the Reserved Space of such Site,
including without limitation the operation of such BellSouth Entity's
Communications Equipment thereon.

          (f) No BellSouth Entity shall create or permit any Lien against the
Subleased Property of any Site, or any part thereof.  If any Lien is filed
against all or any part of the Subleased Property of any Site, BSPCI shall cause
the same to be discharged by payment, satisfaction or posting of bond within
thirty (30) days after demand therefor by TowerCo.  If BSPCI fails to cause any
Lien to be discharged within the permitted time, TowerCo may cause it to be
discharged and may pay the amount of such Lien in order to do so.  If TowerCo
makes any such payment, all amounts paid by TowerCo shall be payable by BSPCI to
TowerCo upon demand.  Nothing in this Sublease shall prohibit any BellSouth
Entity from permitting a Lien against its interest under the Ground Lease or
Reserved Space of any Site.

          (g) BSPCI may, at BSPCI's sole cost and expense, in its own name and
on its own behalf or in the name of and on behalf of TowerCo, in good faith,
contest any claim of Lien and, in the event of any such contest, may permit such
claim of Lien so contested to remain unpaid, unsatisfied and undischarged during
the period of such contest and any appeal therefrom; provided, however, that, if
the Subleased Property of any Site or any part thereof are subject to imminent
danger of loss or forfeiture by virtue of or by reason of such claim of Lien,
such claim of Lien shall be complied with forthwith or BSPCI shall deposit with
TowerCo a sum of money reasonably required by TowerCo as security to protect the
Subleased Property of such Site from any such loss or forfeiture.   TowerCo, at
the sole cost and expense of BSPCI, shall cooperate fully with BSPCI in any such
contest.

          20. CONDEMNATION.

          (a) If there occurs a Taking of all or a Substantial Portion of any
Site, other than a Taking for temporary use, that impairs or adversely affects
any BellSouth Entity's full use

                                       37
<PAGE>

and enjoyment of the Reserved Space, then this Sublease shall automatically
terminate as to such Site unless otherwise agreed by the Parties, and the Term
shall automatically expire as to such Site, on the Date of Taking, as if such
date were the Site Expiration Date as to such Site, and all Rent and other sums
payable by TowerCo and BSPCI in respect of such Site shall be apportioned and
paid through and including the Date of Taking.

          (b) If there occurs a Taking of less than a Substantial Portion of any
Site, then this Sublease and all duties and obligations of TowerCo under this
Sublease in respect of such Site shall remain unmodified, unaffected and in full
force and effect; provided, however, that the Rent in respect of such Site
payable after the Taking shall be reduced to an amount which bears the same
ratio to the Rent payable immediately prior to the Taking as the rental value of
the Subleased Property of such Site after taking bears to the rental value of
the Subleased Property of that Site immediately prior to the Taking.  TowerCo
shall promptly proceed to reconstruct, restore and repair the remaining portion
of the Subleased Property of such Site (to the extent feasible) to a condition
substantially equivalent to the condition thereof prior to the Taking.  TowerCo
shall be entitled to apply the Award received by TowerCo to the reconstruction,
Restoration and repair of any Subleased Property of any Site from time to time
as such work progresses.  If the cost of the repair work exceeds the Award
recovered by TowerCo, TowerCo shall pay the excess cost.

          (c) If there occurs a Taking of any Subleased Property of any Site or
any portion thereof, for temporary use, then this Sublease shall remain in full
force and effect as to such Site for the remainder of the then current term;
provided, however, that during such time as TowerCo shall be out of possession
of such Subleased Property by reason of such Taking, the failure to keep,
observe, perform, satisfy and comply with those terms and conditions of this
Sublease compliance with which are effectively impractical or impossible as a
result of TowerCo's being out of possession of such Subleased Property (and
which shall not include payment of Rent) shall not be an event of default
hereunder.  The Award for any such temporary Taking payable for any period prior
to the Site Expiration Date shall be paid to TowerCo and, for any period
thereafter, to BSPCI.

          21. WAIVER OF SUBROGATION; INDEMNITY.

          (a) Except as provided in this Sublease, to the extent permitted by
applicable Laws, TowerCo and each BellSouth Entity hereby waive any and all
rights of recovery, claim, action or cause of action against each other, their
respective agents, officers and employees, for any loss or damage that may occur
to the Subleased Property of each Site,  by reason of fire, the elements, or any
other cause insured against, or required to be insured against, under the terms
of policies of insurance maintained, or required to be maintained, for the
Subleased Property of such Site, by TowerCo or such BellSouth Entity (as the
case may be) under the terms of this Sublease, regardless of cause or origin.

          (b) Subject to the provisions of SECTION 21(A) above, TowerCo agrees
to indemnify and to hold each BellSouth Entity Indemnitee harmless from any and
all Claims,  with respect to bodily injury, personal injury or property damage
suffered or incurred by such

                                       38
<PAGE>

BellSouth Entity Indemnitee by reason of, or arising out of TowerCo's ownership,
operation and maintenance of each Site (including the Tower and Improvements
thereon), including, without limitation: (i) any default, breach, performance or
nonperformance by TowerCo of its respective obligations and covenants under this
Sublease; (ii) any Claims against BellSouth Entity Indemnitee arising out of or
resulting from (x) TowerCo's use, operation, maintenance or occupancy of any
part of the Site or resulting from the condition of the Site or (y) any Space
Subtenant's use, operation, maintenance or occupancy of its Communications
Facility; (iii) any failure of TowerCo to comply with any applicable Laws or
with the directives of FCC and FAA that TowerCo is required to comply with
pursuant to this Sublease or under applicable Laws; (iv) any Claims arising out
of or resulting from TowerCo's or any Space Subtenant's acts or omissions or the
negligence or intentional acts or omissions of any of their respective agents,
employees, engineers, contractors, subcontractors, licensees, or invitees in or
about the Subleased Property of each Site, and (v) any other provision of this
Sublease which provides that TowerCo shall indemnify and hold harmless any
BellSouth Entity or a BellSouth Entity Indemnitee in respect of the matters
contained in such provision. If any action or proceeding is brought against any
BellSouth Entity Indemnitee by reason of any such Claim, TowerCo upon notice
from BSPCI covenants and agrees to defend such action or proceeding at its
expense.

          (c) Subject to the provisions of SECTION 21(A) above, each BellSouth
Entity agrees to indemnify and to hold each TowerCo Indemnitee harmless from any
and all Claims with respect to bodily injury, personal injury or property damage
suffered or incurred by TowerCo by reason of, or arising out of (i) any default,
breach, performance or nonperformance of such BellSouth Entity's obligations and
covenants under this Sublease; (ii) any Claims against TowerCo arising out of or
resulting from such BellSouth Entity's use, operation, maintenance or occupancy
of its Communications Equipment or the Reserved Space, to the extent TowerCo is
not responsible therefor under the terms of this Sublease; (iii) such BellSouth
Entity's failure to comply with any applicable Laws or with the directives of
FCC and FAA as to such BellSouth Entity's Communications Equipment; (iv) any
Claims against TowerCo arising out of or resulting from any acts or omissions or
the negligence or intentional actions or omissions of any of such BellSouth
Entity's agents, employees, engineers, contractors, subcontractors, licensees or
invitees; and (v) any other provision of this Sublease which provides that a
BellSouth Entity shall indemnify and hold harmless TowerCo in respect of the
matters contained in such provision.  If any action or proceeding is brought
against TowerCo by reason of any such Claim, the applicable BellSouth Entity
upon notice from TowerCo covenants and agrees to defend such action or
proceeding at its expense.

                                       39
<PAGE>

          22. SUBORDINATION AND ATTORNMENT.

          (a)  This Sublease and all rights of TowerCo therein, and all interest
or estate of TowerCo in the Subleased Property of each Site, or any portion
thereof, shall be subordinate to any and all Mortgages, which at any time during
the Term, may be placed upon the Subleased Property, or any portion thereof, by
any BellSouth Entity or any of its Affiliates, and to any replacements,
renewals, amendments, modifications, extensions or refinancing thereof, and to
each and every advance made under any Mortgage; provided, however, that the
subordination and attornment contained herein shall not be effective unless the
existing or any future Mortgagee thereunder shall execute and deliver an NDA in
favor of TowerCo, providing that: (i) such Mortgagee will at all times fully
recognize TowerCo's rights under this Sublease, and in the event of a
foreclosure under any such Mortgage, so long as no event of default shall have
occurred and be subsisting hereunder, and so long as TowerCo shall attorn to the
purchaser upon such foreclosure, and so long as TowerCo continues to pay the
Rent with respect to all Sites covered by this Sublease and to fully and
completely keep, observe, satisfy, perform and comply with all agreements,
terms, covenants, conditions, requirements, provisions and restrictions of this
Sublease, such Mortgagee shall not disturb TowerCo's possession of the Subleased
Property; and (ii) that upon Mortgagee acquiring title to the Subleased
Property, TowerCo shall attorn directly to such Mortgagee. TowerCo shall agree
to such other terms and conditions in the NDA as may be reasonably required by
such  Mortgagee, provided that such terms and conditions do not affect TowerCo's
rights, nor increase or alter any of TowerCo's obligations, under this Sublease.

          (b) Subject to the provision of SECTION 22(A), TowerCo shall execute
in a timely manner instruments that may be required to evidence this
subordination clause, in respect of the Subleased Property of each Site.

          23.  ENVIRONMENTAL COVENANTS.

          (a)  For purposes of this Sublease, the following terms shall have the
following meanings:  (i) "HAZARDOUS MATERIAL" or "HAZARDOUS MATERIALS" means and
includes petroleum products, flammable explosives, radioactive materials,
asbestos or any material containing asbestos, polychlorinated biphenyls, or any
hazardous, toxic or dangerous waste, substance or material defined as such or
defined as a hazardous substance or any similar term, by, in or for the purposes
of the Environmental Laws, including, without limitation Section 101(14) of
CERCLA (hereinafter defined); provided that the term "HAZARDOUS MATERIALS" shall
exclude quantities of materials or substances maintained by any BellSouth
Entity, its Affiliates, TowerCo and Space Subtenants on or about any Site
(including Tower and Improvements thereon) in the ordinary course of business,
so long as such materials are maintained in accordance with the applicable
Environmental Laws; (ii) "RELEASE" shall have the meaning given such term, or
any similar term, in the Environmental Laws, including, without limitation
Section 101(22) of CERCLA; and (iii) "ENVIRONMENTAL LAW" or "ENVIRONMENTAL LAWS"
shall mean any "Super Fund" or "Super Lien" law, or any other federal, state or
local statute, law, ordinance, code, rule, regulation, order or decree,
regulating, relating to or imposing liability or standards of conduct concerning
any Hazardous Materials as may now or at any time hereafter be in effect,
including, without

                                       40
<PAGE>

limitation, the following, as same may be amended or replaced from time to time,
and all regulations promulgated thereunder or in connection therewith: the Super
Fund Amendments and Reauthorization Act of 1986 ("SARA"); the Comprehensive
Environmental Response, Compensation and Liability Act of 1980 ("CERCLA"); the
Clean Air Act ("CAA"); the Clean Water Act ("CWA"); the Toxic Substances Control
Act ("TSCA"); the Solid Waste Disposal Act ("SWDA"), as amended by the Resource
Conversation and Recovery Act ("RCRA"); the Hazardous Waste Management System;
and the Occupational Safety and Health Act of 1970 ("OSHA").

          (b) As to each Site (other than BTS Sites), BSPCI represents and
warrants to TowerCo that, as of the date of the Site Designation Supplement for
such Site, (i) to the best of BSPCI's knowledge, no portion of the Land of such
Site is used for the storage, processing, treatment or disposal of Hazardous
Materials, except as set forth in an environmental report delivered to TowerCo;
(ii) to the best of BSPCI's knowledge, no Hazardous Materials have been
released, introduced, spilled, discharged or disposed of, nor has there been a
threat of release, introduction, spill, discharge or disposal of a Hazardous
Materials, on, in, or under the Land of such Site, except as set forth in an
environmental report delivered to TowerCo; (iii) to the best of such BSPCI's
knowledge, there are no pending Claims, administrative proceedings, judgments,
declarations, or orders, whether actual or threatened, relating to the presence
of Hazardous Materials on, in or under the Land of such Site; (iv) to the best
of BSPCI's knowledge, the Land of such Site is in compliance with all applicable
Environmental Laws; and (v) to the best of BSPCI's knowledge,  there are no
pending or threatened or contemplated condemnation actions involving all or any
portion of the Land of such Site.  For purposes of this Section, "TO THE BEST
KNOWLEDGE OF," or words of similar import with reference to BSPCI means actual
knowledge of the management of BSPCI and such actual knowledge will be imputed
to the management of BSPCI if the Hazardous Materials were brought to the Site
by BSPCI or its Affiliates.

          (c) TowerCo covenants and agrees that:  (i) TowerCo shall not conduct
or allow to be conducted upon any Site any business operations or activities, or
employ or use a Site, to generate, manufacture, refine, transport, treat, store,
handle, dispose of, transfer, produce, or process Hazardous Materials; provided
that TowerCo shall have the right to bring and keep and allow any Space
Subtenant to bring and keep on the Subleased Property of each Site in compliance
with all applicable Laws, batteries, generators and associated fuel tanks and
other substances commonly used in the industry necessary for the operation and
maintenance of each Site; (ii) TowerCo shall carry on its business and
operations at each Site in compliance in all respects with, and will remain in
compliance with, all applicable Environmental Laws; (iii) TowerCo shall not
create or permit to be created any Lien against  any Site for the costs of any
response, removal or remedial action or clean-up of Hazardous Materials; (iv)
TowerCo shall promptly conduct and complete all investigations, studies,
sampling and testing, and all remedial, removal, and other actions necessary to
clean up and remove all Hazardous Materials on, from or affecting each Site in
accordance with all applicable Environmental Laws; (v) TowerCo shall promptly
notify BSPCI in writing if TowerCo receives any notice, letter, citation, order,
warning, complaint, injury, claim or demand that:  (w) TowerCo has violated, or
is about to violate, any Environmental Law, (x) there has been a Release or
there is a threat of Release, of Hazardous

                                       41
<PAGE>

Materials at or from the applicable Site, (y) TowerCo may be or is liable, in
whole or in part, for the costs of cleaning up, remediating, removing or
responding to a Release of Hazardous Materials, or (z) a Site are subject to a
Lien favor of any governmental entity for any liability, cost or damages under
any Environmental Law.

          (d) Each BellSouth Entity covenants and agrees that as to each Site
(other than with respect to any BTS Site, prior to Completion of such Site):
(i) such BellSouth Entity shall not conduct or allow to be conducted upon any
Reserved Space of any Site any business operations or activities, or employ or
use a Reserved Space of any Site, to generate, manufacture, refine, transport,
treat, store, handle, dispose of, transfer, produce, or process Hazardous
Materials; provided that such BellSouth Entity shall have the right to bring and
keep on the Reserved Space of any Site in compliance with all applicable Laws,
batteries, generators and associated fuel tanks and other substances commonly
used in the industry necessary for the operation and maintenance of each
Reserved Space of any Site; (ii) such BellSouth Entity shall carry on its
business and operations on the Reserved Space of any Site in compliance in all
respects with, and will remain in compliance with, all applicable Environmental
Laws; (iii) such BellSouth Entity shall not create or permit to be created any
Lien against  any Reserved Space of any Site for the costs of any response,
removal or remedial action or clean-up of Hazardous Materials; (iv) such
BellSouth Entity shall promptly conduct and complete all investigations,
studies, sampling and testing, and all remedial, removal, and other actions
necessary to clean up and remove all Hazardous Materials on, from or affecting
the Reserved Space of each Site in accordance with all applicable Environmental
Laws; (v) such BellSouth Entity shall promptly notify TowerCo in writing if such
BellSouth Entity receives any notice, letter, citation, order, warning,
complaint, injury, claim or demand that:  (w) such BellSouth Entity has
violated, or is about to violate, any Environmental Law, (x) there has been a
Release or there is a threat of Release, of Hazardous Materials at or from the
Reserved Space of any Site, (y) such BellSouth Entity may be or is liable, in
whole or in part, for the costs of cleaning up, remediating, removing or
responding to a Release of Hazardous Materials, or (z) the Reserved Space of any
Site is subject to a Lien in favor of any governmental entity for any liability,
cost or damages under any Environmental Law.

          (e) Unless resulting or arising solely from the negligent or willful
acts or omissions of a BellSouth Entity or BellSouth Entity's employees, agents,
engineers, contractors, subcontractors, licensees or invitees, TowerCo agrees to
indemnify and hold each BellSouth Entity harmless from and against any and all
Claims, including Claims of any and every kind whatsoever paid, incurred,
suffered by, or asserted against such BellSouth Entity or the Site for, with
respect to, or as a result of the following:  (i) the presence in, on, over or
under, or the escape, seepage, leakage, spillage, discharge, emission or Release
on or from the Site of any Hazardous Materials prior to the applicable Site
Expiration Date or earlier date of termination of this Sublease; (ii) the
violation of any Environmental Laws relating to or affecting the Site prior to
the applicable Site Expiration Date or earlier date of termination of this
Sublease; (iii) the violation of any of the Environmental Laws prior to the
applicable Site Expiration Date or earlier date of termination of this Sublease
in connection with any other property owned by TowerCo, which violation gives or
may give rise to any rights whatsoever in any Party with respect to the

                                       42
<PAGE>

Site by virtue of any of the Environmental Laws; (iv) any warranty or
representation made by TowerCo in this SECTION 23 is or becomes false or untrue
in any material respect; or (v) the violation or breach of, or the failure of
TowerCo to fully and completely keep, observe, satisfy, perform and comply with,
any agreement, term, covenant, condition, requirement, provision or restriction
of this SECTION 23.

          (f) Unless resulting or arising from the negligent or willful acts or
omissions of TowerCo or TowerCo's employees, agents, engineers, contractors,
subcontractors, licensees or invitees, each BellSouth Entity agrees to indemnify
and hold TowerCo harmless from and against any and all Claims, including Claims
of any and every kind whatsoever paid, incurred, suffered by, or asserted
against TowerCo or the Reserved Space of the applicable Site for, with respect
to, or as a result of the following, except as to any BTS Site, to the extent
arising prior to Completion thereof:  (i) the presence in, on, over or under, or
the escape, seepage, leakage, spillage, discharge, emission or Release on or
from the Reserved Space of any Site of any Hazardous Materials prior to the
applicable Site Expiration Date or earlier date of termination of this Sublease;
(ii) the violation of any Environmental Laws relating to or affecting the
Reserved Space of any Site prior to the applicable Site Expiration Date or
earlier date of termination of this Sublease; (iii) the violation of any of the
Environmental Laws prior to the applicable Site Expiration Date or earlier date
of termination of this Sublease in connection with any other property owned by
TowerCo, which violation gives or may give rise to any rights whatsoever in any
Party with respect to the Reserved Space of any Site by virtue of any of the
Environmental Laws; (iv) any warranty or representation made by BSPCI in this
SECTION 23 is or becomes false or untrue in any material respect; or (v) the
violation or breach of, or the failure of BSPCI to fully and completely keep,
observe, satisfy, perform and comply with, any agreement, term, covenant,
condition, requirement, provision or restriction of this SECTION 23.

          (g) Notwithstanding anything to the contrary in this Sublease, in the
event any Claim of a type giving rise to indemnification obligations under
SECTION 23 is asserted against a  TowerCo Indemnitee and it cannot be readily
determined that it was the act or omission of a BellSouth Entity that gave rise
to such Claim, it shall be assumed for all purposes hereof that it was TowerCo's
or a Space Subtenant's act or omission, TowerCo shall indemnify BellSouth Entity
Indemnitees in respect of such Claim pursuant to SECTION 23(E), and no BellSouth
Entity shall have obligation or liability to any TowerCo Indemnitee in respect
of such Claim unless and until it is finally determined that a BellSouth
Entity's act or omission gave rise to such Claim.  The provisions of this
SECTION 23 shall survive the applicable Site Expiration Date or earlier
termination of this Sublease.  The foregoing provisions of this SECTION 23 are
not intended to limit the generality of any of the other provisions of this
Sublease.

          24.  INSURANCE.

          (a) From and after the Site Commencement Date as to each Site, the
applicable BellSouth Entity shall procure, and shall maintain in full force and
effect at all times during the Term as to such Site, the following types of
insurance with respect to the Reserved Space of each Site, and, if applicable,
any of the Available Space subleased to BSPCI pursuant to SECTION 25(D), paying
as the same become due all premiums therefor:

                                       43
<PAGE>

               (i) commercial general public liability insurance insuring
     against all liability of such BellSouth Entity and such BellSouth Entity's
     officers, employees, agents, licensees and invitees arising out of, by
     reason of or in connection with the use or occupancy of the Reserved Space
     of the applicable Site and, if applicable, any of the Available Space
     subleased to BSPCI pursuant to SECTION 25(D), if any, in an amount of not
     less than $1,000,000 for bodily injury or property damage as a result of
     one occurrence, and not less than $2,000,000 for bodily injury or property
     damage in the aggregate;

               (ii) umbrella or excess liability insurance with limits not less
     than $5,000,000 per occurrence and in the aggregate; and

               (iii)  workers' compensation insurance covering all employees of
     such BellSouth Entity to the extent required by any Laws.

          (b) Each BellSouth Entity shall pay all premiums for the insurance
coverage which such BellSouth Entity is required to procure and maintain under
this Sublease.  Each insurance policy: (i) shall name TowerCo as an additional
insured; provided that such requirement shall only apply to liability policy and
shall have no application to workers' compensation policies; and (ii) shall
provide that the policy cannot be canceled as to TowerCo except after the
insurer endeavors to give TowerCo thirty (30) days' written notice of
cancellation.   TowerCo agrees that each BellSouth Entity may, at such BellSouth
Entity's option and election self insure with respect to all or a portion of the
risks required to be insured against by such BellSouth Entity under this SECTION
24.  If any BellSouth Entity elects to be covered by and participate in its self
insurance and risk management programs, BSPCI shall notify TowerCo of such
election. From time to time, upon reasonable request by TowerCo, such BellSouth
Entity shall furnish to TowerCo the information concerning its risk management
and self insurance policies and programs in effect at the time of such request.

          (c) For each Site, TowerCo shall procure, and shall maintain in full
force and effect at all times during the Term as to the applicable Site, the
following types of insurance with respect to each Site, including the Tower and
Improvements thereon, paying as the same become due all premiums therefor:

               (i) commercial general public liability insurance insuring
     against all liability of TowerCo and TowerCo's officers, employees, agents,
     licensees and invitees arising out of, by reason of or in connection with
     the use, occupancy or maintenance of each Subleased Property (including
     Tower and the Improvements), in an amount of not less than $1,000,000 for
     bodily injury or property damage or as a result of one occurrence, and not
     less than $2,000,000 for bodily injury or property damage in the aggregate;

               (ii) umbrella or excess liability insurance with limits not less
     than $5,000,000 per occurrence and in the aggregate; and

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<PAGE>

               (iii)  insurance in an amount not less than full replacement cost
     of the Tower and Improvements of each Site, against direct and indirect
     loss or damage by fire and all other casualties and risks covered under
     "All Risk" insurance; and

               (iv) workers' compensation insurance covering all employees of
     TowerCo or its Affiliates to the extent required by any Laws.

          (d) TowerCo shall pay all premiums for the insurance coverage which
TowerCo is required to procure and maintain under this Sublease.  Each insurance
policy (i) shall name BSPCI as an additional insured; provided that such
requirement shall only apply to liability policy and shall have no application
to workers' compensation policies; and (ii) shall provide that the policy cannot
be canceled as to BSPCI except after the insurer gives BSPCI ten (10) days'
written notice of cancellation.

          (e) All policy amounts set forth in this SECTION 24 shall be reset
every five (5) years during the Term to increase by an amount not less than the
CPI Increase over the five (5) year period, except to the extent the Parties
otherwise agree.

          (f) TowerCo shall not, on its own initiative or pursuant to request or
requirement of any Space Subtenants or other Person, take out separate insurance
concurrent in form or contributing in the event of loss with that required in
SECTION 24(C), unless BSPCI is named therein as an additional insured.  The
Parties agree that, with respect to Parties, the outstanding publicly traded
debt of which is rated investment grade by Standard & Poor's or Moody's, all
policies of insurance required by this SECTION 24 may contain such loss
retention provisions or deductibles as is reasonable in light of financial
conditions of the Parties.  TowerCo shall immediately notify BSPCI whenever any
such separate insurance is taken out and shall deliver to BSPCI original
certificates evidencing the same.

          (g) As to the Subleased Property of each Site, all policies of
insurance shall be written on companies rated A+ by AM Best or a comparable
rating and licensed in the State where such Site is located.  Certificates
evidencing insurance shall be in a form reasonably acceptable to the recipient
Party, shall be delivered to such Party upon commencement of the Term and prior
to expiration of such policy, new certificates evidencing such insurance, shall
be delivered to such Party not less than twenty (20) days prior to the
expiration of the then current policy term.  The Parties agree that all policies
of insurance required by this SECTION 24, including from Space Subtenants, may
contain such loss retention provisions or deductibles as is reasonable in light
of financial conditions of the Parties.

          (h) Nothing in this SECTION 24 shall prevent any BellSouth Entity or
TowerCo from obtaining insurance of the kind and in the amount provided for
under this SECTION 24 under a blanket insurance policy or policies (evidence
thereof reasonably satisfactory to the other Party shall be delivered to the
other Party by the insuring Party) which may cover other properties owned or
operated by the insuring Party as well as the Subleased Property or the
Available Space; provided, however, that any such policy of blanket insurance
shall:  (i) specify the

                                       45
<PAGE>

amounts thereof to the extent such amounts are used to meet the initial limits
required pursuant to this SECTION 24, it being understood that such
specification shall not diminish or limit the availability of the entire amount
of the blanket insurance policy; and (ii) provide that such policies of blanket
insurance shall, as respects the Subleased Property of each Site, contain the
various provisions required of such an insurance policy by the foregoing
provisions of this SECTION 24.

          25.  RIGHT OF SUBSTITUTION; RIGHT OF FIRST REFUSAL.

          (a) Notwithstanding anything to the contrary contained herein and
subject to SECTION 5(B), each BellSouth Entity shall have the right to modify
and/or replace, at such BellSouth Entity's expense, its Communications Equipment
at any Site provided said replacement Communications Equipment does not increase
the weight or sail area by more than ten percent (10%) of the weight or sail
area on the applicable Site Commencement Date.

          (b) Notwithstanding anything to the contrary contained herein, if
during the Term, there is any Available Space in respect of the Subleased
Property of any Site, then BSPCI shall have the Right of Substitution as to such
Available Space, provided that the relocation shall not violate the requirements
of SECTION 25(A).  The Right of Substitution pursuant to this SECTION 25(B) may
be exercised by BSPCI at any time, and from time to time, without limit, upon
written notice to TowerCo.  If BSPCI elects to exercise its Right of
Substitution, then, upon completion of the relocation of the Communications
Equipment of BSPCI on the Tower and Improvements thereon, the previously
existing Reserved Space of the applicable Site shall automatically be released
by BSPCI and become a part of the Subleased Property of such Site, subject to
the terms of this Sublease, and concurrently therewith, the Available Space on
such Site to which the Communications Equipment of BSPCI has been relocated
shall, upon the amendment of the Site Designation Supplement, automatically
become and constitute the Reserved Space of such Site subject to SECTION 5.  The
terms of this SECTION 25(B) shall be self-operative, and no further instrument
shall be required to evidence any Substitution; provided, however, that upon the
request of either BSPCI or TowerCo, the Parties shall promptly execute such
instruments as may be reasonably required to further evidence such Substitution,
including without limitation an amendment to the applicable Site Designation
Supplement and cause such amendment to be recorded at BSPCI's cost and expense.
BSPCI shall, at BSPCI's cost and expense, complete the relocation of its
Communications Equipment within thirty (30) days of the exercise of its Right of
Substitution and return the previously existing Reserved Space to its original
condition, ordinary wear and tear excepted.

          (c) Notwithstanding anything to the contrary contained herein, if
during the Term, TowerCo intends to sublease any Available Space of the
Subleased Property of any Site to a potential Space Subtenant, TowerCo shall
send BSPCI a copy of any letter-offer, letter of intent, or other correspondence
with the potential Space Subtenant together with a summary of the economic terms
of the proposed lease or sublease as contained in such documents, which economic
terms shall include at least the number and location of all Sites subject to the
proposed lease or sublease, the number, type, and location of each antenna on
each Tower, the rent payable for such antenna at each location on the Tower
(including any escalation provisions), and the

                                       46
<PAGE>

term of each Space Subtenant lease or sublease and each of any renewals thereof
(the "ECONOMIC OFFER"). BSPCI may, in its sole discretion, by providing written
notice thereof to TowerCo within ten (10) days after receipt of the Economic
Offer from TowerCo (x) exercise its Right of Substitution pursuant to SECTION
25(B) in respect of such Available Space, or (y) exercise its Right of First
Refusal in respect of such Available Space pursuant to SECTIONS 25(E) and (F),
or (z) exercise both, if with respect to multiple Sites. If TowerCo intends to
sublease Available Space at multiple Sites, BSPCI shall not be entitled to
exercise either its Right of Substitution and/or its Right of First Refusal as
to any Available Space unless BSPCI exercises such Right in respect of a minimum
of the greater of (i) five percent (5%) or (ii) two (2) of the total number of
Available Spaces for those multiple Sites that TowerCo intends to sublease.

          (d) If BSPCI exercises its Right of Substitution as to any Available
Space, then such Available Space shall become the Reserved Space for all
purposes of this Sublease and be subject to the provisions of SECTION 5.   If
BSPCI exercises its Right of First Refusal as to such Available Space, then
TowerCo shall sublease the Available Space to BSPCI subject to the terms and
conditions set forth in the applicable Economic Offer and BSPCI and TowerCo
shall execute a sublease agreement in the form of EXHIBIT B, as modified to
reflect the terms and conditions of the applicable Economic Offer, or in any
other form acceptable to TowerCo and BSPCI and, BSPCI shall, for all purposes of
this Sublease, become a Space Subtenant of such Available Space.

          (e) If BSPCI fails to notify TowerCo as to its election under SECTION
25(D), then BSPCI's options referred to in SECTION 25(D) with respect to such
Available Space shall expire and TowerCo shall be entitled to sublease such
Available Space to a potential Space Subtenant upon the terms and conditions
contained in the applicable Economic Offer.

          (f) If TowerCo exercises its right to sublease any Available Space of
any Site to a potential Space Subtenant in accordance with the Economic Offer,
whether or not BSPCI exercises all or part of its Right of Substitution or Right
of First Refusal with respect thereto, TowerCo shall promptly provide BSPCI copy
of the final definitive lease or sublease with the Space Subtenant (the "FINAL
AGREEMENT").  If the economic terms of the Economic Offer are not the same or
better than those of the Final Agreement, then, in addition to any other
remedies BSPCI have, BSPCI may require that any Site Maintenance Charge, if it
exercised its Right of Substitution, or rent, if it exercised its Right of First
Refusal, and all other economic terms, be reduced to and conformed with those of
the Final Agreement.

          (g) If such Available Space has not been so subleased to such Space
Subtenant within one hundred and twenty (120) days after BSPCI receipt of the
applicable Economic Offer, then the restrictions provided in this SECTION 25
shall again become effective with respect to such Available Space, and TowerCo
shall have no right to sublease any such Available Space without again offering
such Available Space to BSPCI in accordance with the provisions of this SECTION
25.

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<PAGE>

          26.  ASSIGNMENT AND SUBLETTING.

          (a) Without the prior written consent of BSPCI, TowerCo may not assign
this Sublease or any of TowerCo's rights hereunder in whole or in part, or
sublet this Sublease in whole, or any of TowerCo's rights hereunder; except that
TowerCo may assign this Sublease or sublet all or any portion of the Subleased
Property of each Site, without the requirement of any consent by BSPCI, to a
successor corporation or entity, by way of merger, consolidation or other
reorganization, or to any parent, subsidiary or Affiliate of TowerCo, or to any
Person acquiring all or substantially all of TowerCo's assets, or to any Person
acquiring and continuing that portion of TowerCo's business operations conducted
at or from the Subleased Property; provided, however, in each case that such
assignee: (i) is a Permitted TowerCo Transferee; and (ii) is not a BSPCI
Competitor.  The foregoing restriction shall not limit the right of TowerCo,
without notice to or consent of BSPCI, to sublease, license or otherwise
transfer rights to utilize all or any part of the Subleased Property of any Site
or any Available Space on such Site to Space Subtenants.

          (b) Notwithstanding anything to the contrary contained in this
Sublease, the parties acknowledge and agree that BSPCI and the Carolinas
Partnership shall have the unrestricted right to sell, convey, transfer, assign,
sublease or otherwise dispose its respective Reserved Space in any Site to any
of its Affiliates.  The parties further agree that in connection with a
Partitioning Event in respect of a BellSouth Entity Affiliate, the Carolinas
Partnership may sublease or assign the Reserved Space of the affected Sites to
such BellSouth Entity Affiliate and upon such sublease or assignment the
Carolinas Partnership shall vacate such Reserved Space, but for all purposes
hereof shall remain responsible for the performance of any and all of its
obligations hereunder.  After the tenth (10th) anniversary of the date hereof,
BSPCI shall have the unrestricted right to sell, convey, transfer, assign,
sublease or otherwise dispose of BSPCI's interest in and to any Site (including
BSPCI's or its Affiliate's interest in and to the Subleased Property of such
Site), in whole or in part (a "TRANSFER").  Subject to the first two (2)
sentences of this SECTION 26(B), prior to the tenth (10th) anniversary of the
date hereof, BSPCI may Transfer BSPCI's interest in and to any Site (including
BSPCI's or its Affiliate's interest in and to the Subleased Property of such
Site), in whole or in part, if any such Transfer is to:  (i) a BellSouth Entity
Affiliate; (ii) any Person that is not a BellSouth Entity Affiliate and does not
qualify as a Permitted Transferee (a "NON-QUALIFYING TRANSFEREE"), so long as
the aggregate number of Sites that are the subject of one or more Transfers
pursuant to this clause (ii) at any time during the Term does not exceed twenty
percent (20%) of the Sites now or hereafter subject to this Sublease; or (iii) a
Permitted Transferee or, subject to the further restrictions set forth in the
last paragraph of this SECTION 26(B), a Non-Qualifying Transferee, (x) in
connection with a Market Transaction (as hereinafter defined), (y) in connection
with the Transfer of a single Site, subject to TowerCo's rights under SECTION
10(D), or (z) in connection with a Transfer of all or a substantial portion of
the Sites subject to this Sublease.  In the event of any such Transfer by BSPCI
or its Affiliate, except in the case of a Transfer to a Non-Qualifying
Transferee pursuant to clause (iii), all obligations under this Sublease of the
Person effecting such Transfer shall cease and terminate, and TowerCo shall look
only and solely to the Person to whom or which BSPCI's or such Affiliate's
interest in and to such Site (including BSPCI's or such Affiliate's interest in
and to the Subleased Property thereof or

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<PAGE>

any portion thereof) (a "TRANSFEREE") is Transferred for performance of all of
BSPCI's or such Affiliate's duties and obligations under this Sublease.

          The term "MARKET TRANSACTION" means any Transfer of Site(s) between a
BellSouth Entity or BellSouth Entity Affiliates, on the one hand, and other
providers of telecommunications services who are not BellSouth Entity
Affiliates, on the other hand, for the primary purpose of allowing a BellSouth
Entity or a BellSouth Entity Affiliate to enter a new market, to expand an
existing market, to exit an existing market, or to exit part of an existing
market, including, without limitation, any transfer of Sites(s) by a BellSouth
Entity or BellSouth Entity Affiliates to other providers of telecommunications
services who are not BellSouth Entity Affiliates within one or more geographic
locations, in each case regardless of whether such market is defined in terms of
geographic locations or new services.

          Notwithstanding the foregoing, in the event of a Transfer by BSPCI or
its Affiliate pursuant to clause (iii) of this SECTION 26(B) to a Non-Qualifying
Transferee, BSPCI or such Affiliate shall remain liable under this Sublease for
such Non-Qualifying Transferee's performance of BSPCI's obligations hereunder;
provided, however, that if either (x) such Non-Qualifying Transferee ultimately
becomes a Permitted Transferee or (y) no unwaived event of default on the part
of such Non-Qualifying Transferee occurs in respect of such Sites for three (3)
years after the date of such Transfer to such Transferee, BSPCI or such
Affiliate, as applicable, shall be released from any and all obligations under
this Sublease as to such Sites, pursuant to SECTION 26(C), and upon BSPCI's
request TowerCo shall confirm such release in writing.

          (c) Except as expressly provided in SECTION 26(B), wherever under or
in connection with this Sublease BSPCI assigns its right, title or interest, in
whole or in part, in or to this Sublease or any Site, BSPCI shall be released
from performing any and all obligations under this Sublease in respect of the
right, title or interest so assigned and under the applicable Ground Lease, from
and after the date of such assignment, subject only to the applicable BellSouth
Entity's receipt of any consent or approval required from the applicable Ground
Lessor, and TowerCo hereby acknowledges such release.  At or prior to any
partial assignment of this Sublease, BSPCI and such assignee shall have entered
into one or more agreements, including without limitation, a sublease and site
designation supplements (collectively, the "NEW SUBLEASE DOCUMENTS"), that
afford BSPCI and its Affiliates relative rights (including, without limitation,
provisions relating to the calculation of the Site Payment and the right of
BSPCI to act for TowerCo), vis-a-vis BSPCI rights and obligations under the New
Sublease Documents no less favorable to BSPCI and its Affiliates than those
afforded by the Sublease and the Site Designation Supplements with respect to
the rights and obligation of BSPCI and its Affiliate, and are otherwise in form
and substance reasonably satisfactory to BSPCI.

          (d) Without limiting the generality of the other provisions of this
Sublease, any assignment of interest pursuant to this Sublease shall be
effectuated by ten (10) days' written notice of such assignment, which notice
shall include the name, address, and telephone number of assignee.  Each Party
hereby agrees that any attempt of the other Party to assign its interest in

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<PAGE>

this Sublease or any of its rights hereunder, in whole or in part, in violation
of Section 26(A) shall constitute a default under this Sublease and shall be
null and void ab initio.

          27.  ESTOPPEL CERTIFICATE.  Either Party, from time to time upon ten
(10) days' prior request by the other Party, shall execute, acknowledge and
deliver to the requesting Party, or to a person designated by such requesting
Party, a certificate stating that this Sublease is unmodified and in full effect
(or, if there have been modifications, that this Sublease is in full effect as
modified, and setting forth such modifications) and the dates to which Rent and
other sums payable under this Sublease have been paid, and either stating that
to the knowledge of the signer of such certificate no default exists hereunder
or specifying each such default of which the signer has knowledge.  The
requesting Party, at such Party's cost and expense, shall cause such certificate
to be prepared for execution by the requested Party.  Any such certificate may
be relied upon by any prospective Mortgagee or purchaser of the Subleased
Property of each Site.

          28. HOLDING OVER. If TowerCo remains in possession of the Subleased
Property of any Site after expiration or termination of the then current Term as
to such Site without any express written agreement by BSPCI, then TowerCo shall
be and become a tenant at sufferance, and there shall be no renewal or extension
of this Sublease by operation of law.

          29. RIGHTS OF ENTRY AND INSPECTION. (a) TowerCo shall permit BSPCI and
its representatives, agents and employees to enter the Subleased Property of any
Site at all reasonable times for the purposes of inspecting such Subleased
Property, showing the Site to prospective purchasers, tenants and Mortgagees,
making any repairs or replacements or performing any maintenance, and performing
any work on the Site that BSPCI may consider necessary to prevent or cure
deterioration, waste or unsafe conditions. Nothing in this SECTION 29 shall
imply or impose any duty or obligation upon BSPCI to enter upon any Site at any
time for any purpose, or to inspect the Subleased Property at any time, or to
perform, or pay the cost of, any work which TowerCo is required to perform under
any provision of this Sublease, and no BellSouth Entity has such duty or
obligation.

          (b) Each BellSouth Entity shall permit TowerCo and TowerCo's
representatives to inspect such BellSouth Entity Communications Equipment for
the purpose, in the event of an Emergency only, for making repairs or
replacements to address such Emergency.  The foregoing shall not limit TowerCo's
rights pursuant to SECTION 7 hereof.

          30.  A PARTY'S RIGHT TO ACT FOR THE OTHER PARTY.

          (a) In addition to and not in limitation of any other remedy BSPCI may
have under this Sublease, if TowerCo fails to make any payment or to take any
other action when and as required under this Sublease, including without
limitation SECTION 12(A) and EXHIBIT C, BSPCI may, without demand upon TowerCo
and without waiving or releasing TowerCo from any duty, obligation or liability
under this Sublease, make any such payment or take any such other action
required of TowerCo.  Unless TowerCo's failure results in or relates to an
Emergency, BSPCI shall give TowerCo at least ten (10) days prior written notice
of BSPCI's action and TowerCo shall have

                                       50
<PAGE>

the right to cure such failure within such 10-day period. No such notice shall
be required in the event of an Emergency. The actions which BSPCI may take shall
include, but are not limited to, the performance of maintenance or repairs and
the making of replacements to the Towers and Improvements on each Site, the
payment of insurance premiums which TowerCo is required to pay under this
Sublease and the payment of Taxes and Assessments which TowerCo is required to
pay under this Sublease, other than Taxes and Assessments that are paid pursuant
to SECTION 16(B) and reimbursed in the calculation of the Site Maintenance
Charge. BSPCI may pay all incidental costs and expenses incurred in exercising
its rights hereunder, including, without limitation, reasonable attorneys' fees
and expenses, penalties, re-instatement fees, late charges, and interest. One
hundred twenty percent (120%) of the total amount of the costs and expenses
(including salaries and benefits of BSPCI employees charged on a one time basis
but excluding any overhead) attributable to BSPCI's rights under this SECTION
30, is referred to as the "REIMBURSABLE MAINTENANCE EXPENSES" of BSPCI. All
amounts paid by BSPCI pursuant to this SECTION 30(A), and all costs and expenses
incurred by BSPCI in exercising BSPCI's rights under this SECTION 30(A), shall
bear interest at the rate of eighteen percent (18%) per annum from the date of
payment by BSPCI until paid by TowerCo.

          (b) If BSPCI fails to pay any Ground Rent or to make any other payment
or to take any other action when and as required under this Sublease, TowerCo
may, without demand upon BSPCI and without waiving or releasing BSPCI from any
duty, obligation or liability under this Sublease, pay any such Ground Rent,
make any such other payment or take any such other action required of BSPCI.
Unless BSPCI's failure results in or relates to an Emergency, TowerCo shall give
BSPCI at least ten (10) days prior written notice of TowerCo's action.  No such
notice shall be required in the event of an Emergency.  The actions which
TowerCo may take shall include, but are not limited to, the payment of insurance
premiums which the applicable BellSouth Entity is required to pay under this
Sublease and the payment of Taxes and Assessment which such BellSouth Entity is
required to pay under this Sublease.  TowerCo may pay all incidental costs and
expenses incurred in exercising its rights hereunder, including, without
limitation, reasonable attorneys' fees and expenses, penalties, reinstatement
fees, late charges, and interest.  All amounts paid by TowerCo pursuant to this
SECTION 30(B), and all costs and expenses incurred by TowerCo in exercising
TowerCo's rights under this SECTION 30(B), shall bear interest at the rate of
eighteen percent (18%) per annum from the date of payment by TowerCo and shall
be payable by BSPCI to TowerCo upon demand. For purposes of this Section, the
term "EMERGENCY" means any event that causes, has caused or is likely to cause:
(i) as to BSPCI or its Affiliate, any bodily injury, personal injury or property
damage; (ii) as to BSPCI or its Affiliate, suspension, revocation, termination
or any other adverse material effect on such BellSouth Entity's or such
Affiliates' licenses and/or permits; (iii) as to BSPCI, any adverse effect on
the ability of BSPCI or its Affiliate to operate its Communication Facility on
such Site; (iv) as to TowerCo, any adverse effect on the ability of TowerCo to
operate its Subleased Property on such Site; and (v) as to TowerCo, a
termination of the Ground Lease with respect to such Site.

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<PAGE>

          31.  DEFAULTS AND REMEDIES.

          (a) The following events shall constitute events of default by the
applicable BellSouth Entity:

               (i) if such BellSouth Entity fails to timely pay Ground Rent as
          provided in SECTION 3(H) within any applicable grace period thereunder
          or to perform any other material obligations pursuant to the
          applicable Ground Lease for a Site that such BellSouth Entity is
          expressly required to perform pursuant to the terms of this Sublease
          and shall not cure such failure by the later of (x) the expiration of
          any applicable cure period, or (y) thirty (30) days after TowerCo
          gives BSPCI written notice thereof; or

               (ii) if such BellSouth Entity shall violate or breach, or shall
          fail fully and completely to observe, keep, satisfy, perform and
          comply with, any agreement, term, covenant, condition, requirement,
          restriction or provision of this Sublease in respect of any Site
          (which violations, breaches or failures may be different for each
          Site), and shall not cure such violation, breach or failure within
          thirty (30) days after TowerCo gives BSPCI written notice thereof, or,
          if such failure shall be incapable of cure within thirty (30) days, if
          such BellSouth Entity shall not commence to cure such failure within
          such thirty (30) day period and continuously prosecute the performance
          of the same to completion with due diligence; or

               (iii) subject to SECTION 31(I), if such BellSouth Entity breached
          any material representation or warranty in this Sublease as to any
          Site as of the date when made.

               (iv) if such BellSouth Entity becomes insolvent as defined in the
          Uniform Commercial Code under the Laws applicable to this Sublease or
          makes an assignment for the benefit of creditors; or if any action is
          brought by such BellSouth Entity seeking its dissolution or
          liquidation of its assets or seeking the appointment of a trustee,
          interim trustee, receiver or other custodian for any of its property;
          or if such BellSouth Entity commences a voluntary proceeding under the
          Federal Bankruptcy Code; or if any reorganization or arrangement
          proceeding is instituted by such BellSouth Entity for the settlement,
          readjustment, composition or extension of any of its debts upon any
          terms; or if any action or petition is otherwise brought by such
          BellSouth Entity seeking similar relief or alleging that it is
          insolvent or unable to pay its debts as they mature; or if any action
          is brought against such BellSouth Entity seeking its dissolution or
          liquidation of any of its assets, or seeking the appointment of a
          trustee, interim trustee, receiver or other custodian for any of its
          property, and any such action is consented to or acquiesced in by such
          BellSouth Entity or is not dismissed within ninety (90) days after the
          date upon which it was instituted; or if any proceeding under the
          Federal Bankruptcy Code is instituted against such BellSouth Entity
          and

                                       52
<PAGE>

          (1) an order for relief is entered in such proceeding, or (2) such
          proceeding is consented to or acquiesced in by such BellSouth Entity
          or is not dismissed within ninety (90) days after the date upon which
          it was instituted; or if any reorganization or arrangement proceeding
          is instituted against such BellSouth Entity for the settlement,
          readjustment, composition or extension of any of its debts upon any
          terms, and such proceeding is consented to or acquiesced in by such
          BellSouth Entity or is not dismissed within ninety (90) days after the
          date upon which it was instituted; or if any action or petition is
          otherwise brought against such BellSouth Entity seeking similar relief
          or alleging that it is insolvent, unable to pay its debts as they
          mature or generally not paying its debts as they become due, and such
          action or petition is consented to or acquiesced in by such BellSouth
          Entity or is not dismissed within thirty (30) days after the date upon
          which it was brought.

          (b) Upon the occurrence of any event of default by any BellSouth
Entity under SECTION 31(A)(IV), TowerCo may terminate this Sublease by giving
BSPCI written notice of termination, and this Sublease shall be terminated at
the time designated by TowerCo in its notice of termination to BSPCI.  Upon the
occurrence of any event of default by any BellSouth Entity under SECTIONS
31(A)(I)-(A)(III) as to the Reserved Space of a Site, TowerCo may terminate this
Sublease as to such Site by giving BSPCI written notice of termination, and this
Sublease shall be terminated as to the applicable Site at the time designated by
TowerCo in its notice of termination to BSPCI.  Notwithstanding the foregoing,
if BSPCI fails to pay any portion of a Site Payment because BSPCI, acting in
good faith, reduced the amount of Site Maintenance Charges paid to TowerCo in
giving effect to a mistaken belief that it made Reimbursable Maintenance
Expenses under SECTION 30(A) that BSPCI was not permitted to make, such failure
shall not constitute an event of default hereunder.  Upon TowerCo's demand after
any resolution of any dispute as to the amount of such Reimbursable Maintenance
Expenses, BSPCI shall pay such amount to TowerCo, with interest thereon at the
rate of eighteen percent (18%) per annum, from the date such amount was due
until the date paid.

          (c) TowerCo's remedy stated in SECTION 31(B) above shall not preclude
pursuit of any other remedy or remedies provided in this Sublease or any other
remedy or remedies provided for or allowed by law or in equity, separately or
concurrently or in any combination.

          (d) The following events shall constitute events of default by
TowerCo:

               (i) if TowerCo fails to make payment of any Rent or other amount
          hereunder and such failure continues for thirty (30) days after the
          date such payment was due and payable; or

               (ii) (x) TowerCo shall violate or breach, or shall fail fully and
          completely to observe, keep, satisfy, perform and comply with, any
          term, covenant, condition, requirement, restriction or provision of
          this Sublease with

                                       53
<PAGE>

          respect to any Site (which violations, breaches or failures may be
          different for each Site), and shall not cure such violation, breach or
          failure within thirty (30) days after BSPCI gives TowerCo written
          notice thereof, or, if such failure shall be incapable of cure within
          thirty (30) days, if TowerCo shall not commence to cure such failure
          within such thirty (30) day period and continuously prosecute the
          performance of the same to completion with due diligence, or (y) the
          aggregate amount of Reimbursable Maintenance Expenses in respect of
          any Site pursuant to SECTION 30(A) exceeds $2,000 on at least two
          occurrences within the same Sublease Year, whether or not reimbursed
          by TowerCo or included in the calculation of the Site Payment; or

               (iii) subject to SECTION 31(I), any representation or warranty
          made by TowerCo in this Sublease or any Site Designation Supplement
          shall be false or misleading in any material respect on the date as of
          which made (or deemed made); or

               (iv) TowerCo or CCIC shall violate or breach, or shall fail fully
          and completely to observe, keep, satisfy or perform any obligation for
          money borrowed in connection with this Sublease, including, without
          limitation, Mortgages, or any obligation under notes payable or drafts
          accepted, or any obligation of any other agreement, term or condition
          contained in any indenture or agreement under which any such
          obligation is created, guaranteed or secured if the effect of such
          default is to cause such obligation to become due prior to its stated
          maturity; or

               (v) if TowerCo becomes insolvent as defined in the Uniform
          Commercial Code under the Laws applicable to this Sublease or any Site
          or makes an assignment for the benefit of creditors; or if any action
          is brought by TowerCo seeking its dissolution or liquidation of its
          assets or seeking the appointment of a trustee, interim trustee,
          receiver or other custodian for any of its property; or if TowerCo
          commences a voluntary proceeding under the Federal Bankruptcy Code; or
          if any reorganization or arrangement proceeding is instituted by
          TowerCo for the settlement, readjustment, composition or extension of
          any of its debts upon any terms; or if any action or petition is
          otherwise brought by TowerCo seeking similar relief or alleging that
          it is insolvent or unable to pay its debts as they mature; or if any
          action is brought against TowerCo seeking its dissolution or
          liquidation of any of its assets, or seeking the appointment of a
          trustee, interim trustee, receiver or other custodian for any of its
          property, and any such action is consented to or acquiesced in by
          TowerCo or is not dismissed within ninety (90) days after the date
          upon which it was instituted; or if any proceeding under the Federal
          Bankruptcy Code is instituted against TowerCo and (1) an order for
          relief is entered in such proceeding, or (2) such proceeding is
          consented to or acquiesced in by TowerCo or is not dismissed within
          ninety (90) days after the date upon which it was instituted; or if
          any reorganization or arrangement proceeding is instituted against
          TowerCo for the settlement, readjustment,

                                       54
<PAGE>

          composition or extension of any of its debts upon any terms, and such
          proceeding is consented to or acquiesced in by TowerCo or is not
          dismissed within ninety (90) days after the date upon which it was
          instituted; or if any action or petition is otherwise brought against
          TowerCo seeking similar relief or alleging that it is insolvent,
          unable to pay its debts as they mature or generally not paying its
          debts as they become due, and such action or petition is consented to
          or acquiesced in by TowerCo or is not dismissed within thirty (30)
          days after the date upon which it was brought.

          (e) Upon the occurrence of any event of default by TowerCo under
SECTION 31(D) or SECTION 12(C) in respect of any Site, BSPCI may terminate this
Sublease as to the applicable Site by giving TowerCo written notice of
termination, and this Sublease shall be terminated as to such Site, at the time
designated by BSPCI in its notice of termination to TowerCo, unless otherwise
provided herein.  Upon the occurrence of unwaived events of default (whether of
the same or different types) by TowerCo under SECTION 31(D) in respect of more
than twenty (20) Sites during any consecutive five (5) year period, BSPCI may
terminate this Sublease as to all Sites, by giving TowerCo written notice of
termination, and this Sublease shall be terminated as to all Sites at the time
designated by BSPCI in its notice of termination to TowerCo.

          (f) BSPCI's pursuit of any remedy or remedies provided in this
Sublease, including without limitation SECTION 31(E), or any remedy or remedies
provided for or allowed by law or in equity, separately or concurrently or in
any combination, including, without limitation, (i) specific performance or
other equitable remedies; (ii) money damages arising out of such default; (iii)
BSPCI may exercise the Withdrawal Right as to any Site immediately and without
further act, pursuant to SECTION 10; or (iv) BSPCI may perform, on behalf of
TowerCo, TowerCo's obligations under the terms of this Sublease pursuant to
SECTION 30, in which event BSPCI shall have the right to set off all
Reimbursable Maintenance Expenses against the Site Payment BSPCI is required to
make. If the amount of Reimbursable Maintenance Expenses exceeds the Site
Payment payable by BSPCI hereunder and TowerCo does not reimburse BSPCI the full
amount of such excess within ten (10) days following BSPCI's written demand
therefor, BSPCI may terminate this Sublease in respect of all or any of the
Sites pursuant to SECTION 31(E).

          (g) A Party's pursuit of any one or more of the remedies provided in
this Sublease shall not constitute an election of remedies excluding the
election of another remedy or other remedies, or a forfeiture or waiver of any
Site Payment, Rent or other amounts payable under this Sublease as to the
applicable Site by such Party or waiver of any relief or damages or other sums
accruing to such Party by reason of the other Party's failure to fully and
completely keep, observe, perform, satisfy and comply with all of the
agreements, terms, covenants, conditions, requirements, provisions and
restrictions of this Sublease.  TowerCo shall be entitled to injunctive relief
and reasonable attorneys' fees and costs in respect of any event of default by
the applicable BellSouth Entity under SECTION 3(H). Notwithstanding anything to
the contrary contained herein, neither Party shall be liable to the other
parties for indirect, incidental, special or consequential damages, including
but not limited to lost profits, however arising, even if a Party has been
advised of the possibility of such damages.

                                       55
<PAGE>

          (h) Either Party's forbearance in pursuing or exercising one or more
of its remedies shall not be deemed or construed to constitute a waiver of any
event of default or of any remedy.  No waiver by either Party of any right or
remedy on one occasion shall be construed as a waiver of that right or remedy on
any subsequent occasion or as a waiver of any other right or remedy then or
thereafter existing.  No failure of either Party to pursue or exercise any of
it's powers, rights or remedies or to insist upon strict and exact compliance by
the other Party with any agreement, term, covenant, condition, requirement,
provision or restriction of this Sublease, and no custom or practice at variance
with the terms of this Sublease, shall constitute a waiver by either Party of
the right to demand strict and exact compliance with the terms and conditions of
this Sublease.

          (i) Notwithstanding the foregoing, no event of default shall be deemed
to have occurred in respect of any BellSouth Entity under SECTION 31(A)(III) or
in respect of TowerCo under SECTION 31(D)(III), if the other Party gives notice
after one (1) year following:

               (i) the applicable Site Commencement Date in the case of a
          representation or warranty made under this Sublease or the applicable
          Site Designation Supplement, as to any Site;

               (ii) the date hereof, in the case of any other representation or
          warranty made under this Sublease; or

               (iii) in the case of representation or warranty made under the
          Agreement to Sublease, as provided therein.

          32.  QUIET ENJOYMENT.  TowerCo shall, subject to the terms and
conditions of this Sublease, peaceably and quietly hold and enjoy the Subleased
Property of each Site during the Term without hindrance or interruption from any
BellSouth Entity, so long as TowerCo fully and completely keeps, observes,
performs, satisfies and complies with all of the agreements, terms, covenants
and conditions, requirements, provisions and restrictions of this Sublease to be
kept, observed, performed, satisfied and complied with by TowerCo and pays all
Rent and other amounts required to be paid by TowerCo under this Sublease and
any other agreements between such BellSouth Entity and TowerCo.

          33.  NO MERGER.  There shall be no merger of this Sublease or the
subleasehold interest or estate created by this Sublease in any Site with the
superior estate held by the Lessor thereof, by reason of the fact that the same
person or entity may acquire, own or hold, directly or indirectly, both the
subleasehold interest or estate created by this Sublease in any Site and such
superior estate; and this Sublease shall not be terminated, in whole or as to
any Site, except as expressly provided herein.

                                       56
<PAGE>

          34.  BROKER AND COMMISSION.

          (a) All negotiations in connection with this Sublease have been
conducted by and between TowerCo and BSPCI without the intervention of any
person or other Party as agent or broker.

          (b) TowerCo and BSPCI warrant and represent to each other that there
are no broker's commissions or fees payable in connection with this Sublease by
reason of their respective dealings, negotiations or communications.  TowerCo
and BSPCI shall, and do hereby indemnify, defend and hold harmless each other
from and against the Claims, demands, actions and judgments of any and all
brokers, agents and other intermediaries alleging a commission, fee or other
payment to be owing by reason of their respective dealings, negotiations or
communications in connection with this Sublease.

          35.  RECORDING OF SITE DESIGNATION SUPPLEMENT.    Subject to the
applicable provisions of the Agreement to Sublease, upon the execution of this
Sublease, TowerCo shall, at its cost and expense (i) cause the Ground Leases or
memorandum of Ground Leases for the Sites to be filed in the appropriate County
property records, unless such Ground Leases expressly prohibit such recording;
and (ii) promptly following the execution of each Site Designation Supplement
for any Site, cause such Site Designation Supplement to be filed in the
appropriate County property records.

          (b) In addition to and not in limitation of any other provision of
this Sublease, the Parties shall have the right to review and make corrections,
if necessary, to any and all exhibits to the Site Designation Supplements after
the date hereof.  After making such corrections, TowerCo shall re-record any
such Site Designation Supplements to reflect such corrections, if requested by
BSPCI or its Affiliate.  The Parties shall cooperate with each other to cause
changes to be made in the documentation for any Site, and in the Site
Designation Supplement for such Site, if such changes are requested by BSPCI or
its Affiliate to evidence any permitted changes in the description of the
Reserved Space respecting such Site, including, without limitation changes in
BSPCI's or its Affiliate's antennas or other parts of its Communications
Facility at such Site.  In addition to and not in limitation of the foregoing,
BSPCI or its Affiliate shall have the right, at its sole expense, to cause any
amendment to a Site Designation Supplement to be recorded, including without
limitation in connection with such changes.

          36.  COMPLIANCE WITH SPECIFIC FCC REGULATIONS.

          (a) TowerCo understands and acknowledges that Space Subtenants are
engaged in the business of operating communications equipment, including,
without limitation, Communications Equipment at each Site.  The Communications
Equipment is subject to the regulations of the FCC, including without limitation
regulations regarding exposure by workers and members of the public to the radio
frequency emissions generated by any BellSouth Entity's Communications
Equipment.  TowerCo acknowledges that such regulations prescribe the permissible
exposure levels to emissions from the Communications Equipment which can

                                       57
<PAGE>

generally be met by maintaining safe distances from such Communications
Equipment.  In order to comply with such regulations, TowerCo shall install, or
cause the Space Subtenants to install, at its or their expense, such marking,
signage or barriers to restrict access to any Subleased Property of each Site as
TowerCo deems necessary in order to comply with the applicable FCC regulations.
TowerCo further agrees to post, or to cause the Space Subtenants to post,
prominent signage at all points of entry to the Subleased Property of each Site
containing instructions as to any potential risk of exposure and methods for
minimizing such risk.  TowerCo shall cooperate in good faith with each BellSouth
Entity to minimize any confusion or unnecessary duplication that could result in
similar signage being posted with respect to any of such BellSouth Entity's
transmission equipment at or near any Site in respect of any Reserved Space on
such Site.

          (b) TowerCo further agrees to alert all personnel working at or near
each Site, including TowerCo's maintenance and inspection personnel, to heed all
of TowerCo's or Space Subtenant's signage or restrictions with respect to the
Subleased Property of a Site, to maintain the prescribed distance from the
Communications Equipment, and to otherwise follow the posted instructions.
TowerCo further agrees to alert each Space Subtenant in advance of any repair or
maintenance work to be performance on any Site which would require work in
closer proximity to the Subleased Property than prescribed by the signage or
restrictions.

          (c) TowerCo agrees to cooperate with each Space Subtenant on a going-
forward basis with respect to each Site in order to insure that such Space
Subtenant complies with the applicable FCC regulations.

          (d) Each BellSouth Entity acknowledges and agrees that its
Communications Equipment at each Site is subject to the regulations of the FCC,
including without limitation regulations regarding exposure by workers and
members of the public to the radio frequency emissions generated by such
BellSouth Entity's Communications Equipment.  Each BellSouth Entity acknowledges
that such regulations prescribe the permissible exposure levels to emissions
from its Communications Equipment which can generally be met by maintaining safe
distances from such Communications Equipment.  Each BellSouth Entity shall
cooperate in good faith with TowerCo to minimize any confusion or unnecessary
duplication that could result in similar signage being posted with respect to
any of transmission equipment of any BellSouth Entity at or near any Site in
respect of any Reserved Space on such Site.

          (e) Each BellSouth Entity further agrees to alert all personnel
working at or near each Site, including such BellSouth Entity's maintenance and
inspection personnel, to maintain the prescribed distance from the
Communications Equipment, and to otherwise follow the posted instructions of
TowerCo.

          37. CCIC'S GUARANTY.

          (a) CCIC unconditionally guarantees to each BellSouth Entity the full
and timely payment and performance and observance of all of the terms,
provisions, covenants and obligations of TowerCo under this Sublease and each
Site Designation Supplement (the "OBLIGATIONS").  CCIC agrees that if TowerCo
defaults at any time during the Term of this

                                       58
<PAGE>

Sublease and any Site Designation Supplement in the performance of any of the
Obligations, CCIC shall faithfully perform and fulfill all Obligations and shall
pay to each BellSouth Entity all attorneys' fees, court costs, and other
expenses, costs and disbursements incurred by such BellSouth Entity on account
of any default by TowerCo and on account of the enforcement of this guaranty.

          (b) If TowerCo defaults under this Sublease or any Site Designation
Supplement, and any BellSouth Entity elects to enforce the provisions of this
SECTION 37, such BellSouth Entity shall promptly give CCIC written notice
thereof, which notice shall constitute an exercise of such BellSouth Entity's
rights against CCIC pursuant to this  SECTION 37.  Following the receipt of such
notice by CCIC, CCIC shall have the same period of time as is afforded to
TowerCo under this Sublease or the applicable Site Designation Supplement to
cure such default, but no such cure period shall diminish the obligations of
CCIC under this SECTION 37.

          (c) This guaranty obligation of CCIC shall be enforceable by any
BellSouth Entity in an action against CCIC without the necessity of any suit,
action, or proceedings by such BellSouth Entity of any kind or nature whatsoever
against TowerCo, without the necessity of any notice to CCIC of TowerCo's
default or breach under this Sublease or the applicable Site Designation
Supplement, and without the necessity of any other notice or demand to CCIC to
which CCIC might otherwise be entitled, all of which notices CCIC hereby
expressly waives.  CCIC hereby agrees that the validity of this guaranty and the
obligations of CCIC hereunder shall not be terminated, affected, diminished, or
impaired by reason of the assertion or the failure to assert by such BellSouth
Entity against TowerCo any of the rights or remedies reserved to such BellSouth
Entity pursuant to the provisions of this Sublease or the applicable Site
Designation Supplement or any other remedy or right which such BellSouth Entity
may have at law or in equity or otherwise.

          (d) CCIC covenants and agrees that this guaranty is an absolute,
unconditional, irrevocable and continuing guaranty.  The liability of CCIC
hereunder shall not be affected, modified, or diminished by reason of any
assignment, renewal, modification or extension of this Sublease and any Site
Designation Supplement or any modification or waiver of or change in any of the
covenants and terms of this Sublease or any Site Designation Supplement by
agreement of any BellSouth Entity and TowerCo, or by any unilateral action of
either such BellSouth Entity or TowerCo, or by an extension of time that may be
granted by such BellSouth Entity to TowerCo or any indulgence of any kind
granted to TowerCo, or any dealings or transactions occurring between such
BellSouth Entity and TowerCo, including, without limitation, any adjustment,
compromise, settlement, accord and satisfaction, or release, or any bankruptcy,
insolvency, reorganization, arrangement, assignment for the benefit of
creditors, receivership, or trusteeship affecting TowerCo.  CCIC does hereby
expressly waive any suretyship defense it may have by virtue of any statute,
law, or ordinance of any state or other governmental authority.

                                       59
<PAGE>

          (e) All of each BellSouth Entity's rights and remedies under this
guaranty are intended to be distinct, separate, and cumulative and no such right
and remedy herein is intended to be the exclusion of or a waiver of any other.

          (f) CCIC hereby waives presentment, demand for performance, notice of
nonperformance, protest, notice of protest, notice of dishonor, and notice of
acceptance.  CCIC further waives any right to require that an action be brought
against TowerCo or any other person or to require that resort be had by a
BellSouth Entity to any security held by such BellSouth Entity.

          38. SEVERAL LIABILITY.

          Notwithstanding any other provision of this Sublease, the Agreement to
Sublease, the Construction Agreement or any other agreement to the contrary, and
notwithstanding any liability or obligation that BSPCI would have as a general
partner of the Carolinas Partnership under this Sublease or any other agreement
(in each case, whether or not expressly set forth herein or thereon), by
operation of law or otherwise, (i) BSPCI will have no personal liability for the
payment or performance of any obligation of the Carolinas Partnership under this
Sublease or any other agreement (the "CAROLINAS PARTNERSHIP OBLIGATIONS"), and
(ii) CCIC and TowerCo may proceed only against, and rely solely on, the
Carolinas Partnership for payment or performance of any of the Carolinas
Partnership Obligations, and shall not sue or otherwise proceed against BSPCI,
for or in respect of the Carolinas Partnership's failure to pay or perform any
Carolinas Partnership Obligation.

          39. GENERAL PROVISIONS.

          (a) NOTICES.  Whenever any notice, demand or request is required or
permitted under this Agreement, such notice, demand or request shall be in
writing and shall be delivered by hand, be sent by registered or certified mail,
postage prepaid, return receipt requested, or be sent by nationally recognized
commercial courier for next business day delivery, to the addresses set forth
below, or to such other addresses as are specified by written notice given in
accordance herewith, or shall be transmitted by facsimile to the number for each
Party set forth below their respective executions hereof, or to such other
numbers as are specified by written notice given in accordance herewith.  All
notices, demands or requests delivered by hand shall be deemed given upon the
date so delivered; those given by mailing as hereinabove provided shall be
deemed given on the date of deposit in the United States Mail; those given by
commercial courier as hereinabove provided shall be deemed given on the date of
deposit with the commercial courier; and those given by facsimile shall be
deemed given on the date of facsimile transmittal.  Nonetheless, the time
period, if any, in which a response to any notice, demand or request must be
given shall commence to run from the date of receipt of the notice, demand or
request by the addressee thereof.  Any notice, demand or request not received
because of changed address or facsimile number of which no notice was given as
hereinabove provided or because of refusal to accept delivery shall be deemed
received by the Party to whom addressed on the date of hand delivery, on the
date of facsimile transmittal, on the first calendar day after deposit with
commercial courier, or on the third calendar day following deposit in the United
States Mail, as the case may be.

                                       60
<PAGE>

If to TowerCo:                      If to BSPCI or the Carolinas Partnership

Crown Castle South Inc.             BellSouth Personal Communications, Inc.
375 Southpointe Blvd.               1100 Peachtree Street, NE
Cannonsburg, PA  15317              Atlanta, GA  30367
Facsimile No.: (724) 416-2468       Facsimile No.:  (404) 249-0922/5020
Attention: General Counsel          Attention.:  General Counsel

with a copy to:                     with a copy to:

Sittig, Cortese & Wratcher          BellSouth Entity Corporation.
1515 Frick Building                 1155 Peachtree Street, NE, 18th Floor
Pittsburgh, PA 15219                Atlanta, GA  30309
Facsimile No.: (412) 402-4011       Facsimile No.:  (404) 249-2629
Attention: William R. Sittig, Jr.   Attention:  E. John Whelchel, Esq.

If to CCIC:

Crown Castle International Corp.
510 Bering Drive, Suite 500
Houston, Texas  77057
Facsimile No.: 713-570-3150
Attention: Chief Executive Officer
   General Counsel

with a copy to:

Cravath, Swaine & Moore
825 Eighth Avenue, Worldwide Plaza
New York, New York  10019-7475
Facsimile No.:  (212) 474-3700
Attention:  Stephen L. Burns

     (b) FACSIMILE AS WRITING.  The Parties expressly acknowledge and agree
that, notwithstanding any statutory or decisional law to the contrary, the
printed product of a facsimile transmittal shall be deemed to be "written" and a
"writing" for all purposes of this Sublease.

     (c) BINDING EFFECT.  This Sublease shall be binding upon and enforceable
against, and shall inure to the benefit of, the Parties hereto and their
respective heirs, legal representatives, successors and permitted assigns.

     (d) HEADINGS.  The use of headings, captions and numbers in this Sublease
is solely for the convenience of identifying and indexing the various provisions
in this Sublease and

                                       61
<PAGE>

shall in no event be considered otherwise in construing or interpreting any
provision in this Sublease.

          (e) ARBITRATION. (i) Any and all disputes arising out of or in
connection with the negotiation, execution, interpretation, performance or
nonperformance of this Sublease (other than the payment of moneys) shall be
solely and finally settled by arbitration which shall be conducted in Washington
DC, in accordance with the Rules for Non-Administered Arbitration of Business
Disputes (the "RULES") as promulgated from time to time by the CPR Institute for
Dispute Resolution in New York, New York (the "CPR"), by a panel of three
arbitrators selected by the CPR in accordance with the Rules (the
"ARBITRATORS").  The Arbitrators shall be lawyers experienced in real estate and
corporate transactions in the tower industry and shall not have been employed by
or affiliated with any of the Parties or their Affiliates.  The Parties hereby
renounce all recourse to litigation and agree that the award of the Arbitrators
shall be final and subject to no judicial review; provided however, that neither
the provisions of this SECTION 38(E) nor the recourse to arbitration, shall
prejudice the right of any Party to apply to any court of ordinary jurisdiction
for the request of temporary or permanent injunctive or similar judicial relief.
A written transcript shall be kept of all proceedings.  The Arbitrators shall
decide the issues submitted to them, in writing, stating the reasons for their
decision, in accordance with:  (A) the provisions and purposes of this Sublease;
and (B) the laws of the State of Georgia (without regard to its conflicts of
laws rules).

          (ii) The parties agree to facilitate the arbitration by: (A) making
available to one another and to the Arbitrators for examination, inspection and
extraction all documents, books, records and personnel under their control if
determined by the Arbitrators to be relevant to the dispute; (B) conducting
arbitration hearings to the greatest extent possible on successive days; and (C)
observing strictly the time periods established by the Rules or by the
Arbitrators for submission of evidence or briefs.

          (iii)  Judgment on the award of the Arbitrators may be entered in any
court having jurisdiction over the Party against which enforcement of the award
is being sought.  The Arbitrators are expressly authorized to enter orders of
interim or provisional relief each of which may be enforced as a final award.
The Arbitrators shall divide all costs (other than fees of counsel) incurred in
conducting the arbitration in their final award in accordance with what they
deem just and equitable under the circumstances.

          (f) EXHIBITS.  Each and every exhibit referred to or otherwise
mentioned in this Sublease is attached to this Sublease and is and shall be
construed to be made a part of this Sublease by such reference or other mention
at each point at which such reference or other mention occurs, in the same
manner and with the same effect as if each exhibit were set forth in full and at
length every time it is referred to or otherwise mentioned.

          (g) DEFINED TERMS.  Capitalized terms used in this Sublease shall have
the meanings ascribed to them at the point where first defined, irrespective of
where their use occurs, with the same effect as if the definitions of such terms
were set forth in full and at length every time such terms are used.

                                       62
<PAGE>

          (h) PRONOUNS.  Wherever appropriate in this Sublease, personal
pronouns shall be deemed to include the other genders and the singular to
include the plural.

          (i) SEVERABILITY.  If any term, covenant, condition or provision of
this Sublease, or the application thereof to any person or circumstance, shall
ever be held to be invalid or unenforceable, then in each such event the
remainder of this Sublease or the application of such term, covenant, condition
or provision to any other person or any other circumstance (other than those as
to which it shall be invalid or unenforceable) shall not be thereby affected,
and each term, covenant, condition and provision hereof shall remain valid and
enforceable to the fullest extent permitted by law.

          (j) NON-WAIVER.  Failure by any Party to complain of any action, non-
action or breach of any other Party shall not constitute a waiver of any
aggrieved Party's rights hereunder.  Waiver by any Party of any right arising
from any breach of any other Party shall not constitute a waiver of any other
right arising from a subsequent breach of the same obligation or for any other
default, past, present or future.

          (k) RIGHTS CUMULATIVE.  All rights, remedies, powers and privileges
conferred under this Sublease on the Parties shall be cumulative of and in
addition to, but not restrictive of or in lieu of, those conferred by law.

          (l) TIME OF ESSENCE.  Time is of the essence of this Sublease.
Anywhere a day certain is stated for payment or for performance of any
obligation, the day certain so stated enters into and becomes a part of the
consideration for this Sublease.  If any date set forth in this Sublease shall
fall on, or any time period set forth in this Sublease shall expire on, a day
which is a Saturday, Sunday or federal holiday, such date shall automatically be
extended to, and the expiration of such time period shall automatically to be
extended to, the next day which is not a Saturday, Sunday, federal or state
holiday or other non-business day.  The final day of any time period under this
Sublease or any deadline under this Sublease shall be the specified day or date,
and shall include the period of time through and including such specified day or
date.

          (m) APPLICABLE LAW.  This Sublease shall be governed by, construed
under and interpreted and enforced in accordance with the laws of the State of
Georgia, without regard of conflicts of law.

          (n) ENTIRE AGREEMENT.  This Sublease contains the entire agreement of
the Parties with respect to the subject matter hereof, and all representations,
warranties, inducements, promises or agreements, oral or otherwise, between the
Parties not embodied in this Sublease shall be of no force or effect.

          (o) MODIFICATIONS.  This Sublease shall not be modified or amended in
any respect except by a written agreement executed by the Parties in the same
manner as this Sublease is executed.

                                       63
<PAGE>

          (p) COUNTERPARTS.  This Sublease may be executed in several
counterparts, each of which shall be deemed an original, and all of such
counterparts together shall constitute one and the same instrument.

          (q) ATTORNEYS' FEES.  In the event of any litigation arising under or
in connection with this Sublease, the prevailing Party shall be entitled to
recover from the other Party the expenses of litigation (including reasonable
attorneys' fees, expenses and disbursements) incurred by the prevailing Party.

          (r) AUTHORITY.  Each Party hereto warrants and represents that such
Party has full and complete authority to enter into this Sublease and each
individual executing this Sublease on behalf of a Party warrants and represents
that he has been fully authorized to execute this Sublease on behalf of such
Party and that such Party is bound by the signature of such representative.

          (s) COUNSEL.  Each Party hereto warrants and represents that such
Party has been afforded the opportunity to be represented by counsel of its
choice in connection with the execution of this Sublease and has had ample
opportunity to read, review, and understand the provisions of this Sublease.

          (u) NO CONSTRUCTION AGAINST PREPARER. No provision of this Sublease
shall be construed against or interpreted to the disadvantage of any Party by
any court or other governmental or judicial authority by reason of such Party's
having or being deemed to have prepared or imposed such provision.

                     [SIGNATURES APPEAR ON FOLLOWING PAGES]

                                       64
<PAGE>

          IN WITNESS WHEREOF, the Parties have caused this Sublease to be
executed and sealed by their duly authorized representatives, all effective as
of the day and year first written above.

                                           TOWERCO:

                                           CROWN CASTLE SOUTH INC.


                                           By:
                                              --------------------------------
                                              Name:
                                              Title:

                                           CCIC:

                                           CROWN CASTLE INTERNATIONAL CORP.


                                           By:
                                              --------------------------------
                                              Name:
                                              Title:


                                       65
<PAGE>

                                           BSPCI:

                                           BELLSOUTH PERSONAL COMMUNICATIONS,
                                            INC.


                                           By:
                                              --------------------------------
                                              Name:
                                              Title:


                                           THE CAROLINAS PARTNERSHIP:

                                           BellSouth Carolinas PCS, L.P., by
                                            BellSouth Personal Communications,
                                            Inc., its general partner


                                           By:
                                              --------------------------------
                                              Name:
                                              Title:

                                       66

<PAGE>
                                                                    EXHIBIT 2.11

                      CROWN CASTLE GT HOLDING COMPANY LLC

                              OPERATING AGREEMENT

     THIS OPERATING AGREEMENT (this "Operating Agreement") is made and entered
into as of January 31, 2000 (the "Effective Date") by and between the Thrasher
Members (as defined below) and Crown Castle GT Corp. ("Bidder Member"), a
Delaware corporation and a wholly-owned indirect subsidiary of Crown Castle
International Corp. ("Bidder"), a Delaware corporation.  The Thrasher Members
and Bidder Member (and such other persons who shall be admitted in the future in
accordance with the terms hereof and shall have agreed to be bound hereby),
being hereinafter sometimes referred to individually as a "Member" and
collectively as the "Members."

     WHEREAS, GTE Wireless Incorporated, a Delaware corporation ("Thrasher"),
the Transferring Partnerships and the Transferring Corporations (together the
"Transferring Entities"), Bidder, and Bidder Member have entered into a
Formation Agreement dated as of November 7, 1999 (the "Formation Agreement"),
pursuant to which, among other things, (i) the Initial Transferring Entities
will contribute Thrasher Contributed Assets and Thrasher Assumed Liabilities
(both as defined in the Formation Agreement) to Crown Castle GT Holding Company
LLC, a Delaware limited liability company ("HoldCo" or the "Company") in
exchange for membership interests in HoldCo and Bidder Member will make capital
contributions in accordance with the Formation Agreement in exchange for
membership interests in HoldCo; (ii) thereafter HoldCo will cause such Thrasher
Contributed Assets, Thrasher Assumed Liabilities and any Working Capital
Contribution to be contributed to Crown Castle GT Holding Sub LLC, a Delaware
limited liability company ("HoldCo Sub") in exchange for 100% of the membership
interests in HoldCo Sub; (iii) HoldCo Sub will cause such Thrasher Contributed
Assets, Thrasher Contributed Liabilities and any Working Capital Contribution to
be contributed to Crown Castle GT Company LLC, a Delaware limited liability
company ("OpCo"), in exchange for a 99.999% membership interest in OpCo; (iv)
simultaneously with the actions described in (iii), the Thrasher Affiliate
Member will contribute $9,300 in exchange for the Thrasher Retained Interest;
and (v) on future dates certain Transferring Entities will make additional
transfers of Thrasher Contributed Assets, Thrasher Assumed Liabilities, and
Bidder Member will make additional capital contributions according to the
Formation Agreement, to HoldCo in exchange for additional membership interests
in HoldCo; HoldCo will cause Thrasher Contributed Assets, Thrasher Assumed
Liabilities and any Working Capital Contribution to be contributed to HoldCo Sub
as additional contributions to capital; and HoldCo Sub will cause such
additional Thrasher Contributed Assets, Thrasher Assumed Liabilities and any
Working Capital Contribution to be contributed to OpCo as additional capital
contributions.  Such transfers of Thrasher Contributed Assets and Thrasher
Assumed Liabilities are to be effected for convenience purposes as a transfer by
these Transferring Entities of legal title to the Thrasher Contributed Assets
and Thrasher Assumed Liabilities directly to OpCo.
<PAGE>

     WHEREAS, each Transferring Partnership will transfer its respective
interest in the Company received to a corporation that is a Thrasher Affiliate
immediately following the formation of the Company, which Thrasher Affiliates
shall become members, and each Transferring Partnership that receives an
interest in the Company in each subsequent Closing will transfer its respective
interest in the Company received in each subsequent Closing, as described in
(iv) in the paragraph above, to a Thrasher Affiliate immediately after receiving
its respective interest in the Company at each such subsequent Closing;

     WHEREAS, for federal income tax purposes it is intended that the
Transactions qualify in part as a sale and in part as a contribution of the
Thrasher Contributed Assets to the Company;

     NOW, THEREFORE, the parties hereto agree as follows:

                                   ARTICLE I

                               GENERAL PROVISIONS

     Section 1.1  Certain Definitions.  As used in this Agreement, the following
terms have the respective meanings assigned to them below.  All terms not
defined herein shall have the meaning given to them in the Formation Agreement.

          "Adjusted Thrasher HoldCo Interest" means the Thrasher Interest Value,
excluding the Permitted Shares Value for any Bidder Contributed Shares held by
the Company, divided by Total Entity Value.

          "Affiliates" means, with respect to any Person, any Persons
controlling, controlled by or under common control with that Person, as well as
any executive officers, directors and majority-owned entities of that Person or
its other Affiliates.

          "Bell Atlantic" means Bell Atlantic Corporation, a Delaware
corporation.

          "Bell Atlantic/Thrasher Merger" means those transactions contemplated
by that certain Agreement and Plan of Merger by and among Bell Atlantic, Beta
Gamma Corporation and GTE Corporation, dated as of July 27, 1998, as may be
amended from time to time.

          "Bidder" is defined in the Preamble.

          "Bidder Common Stock" shall mean the common stock, $.01 par value, of
Bidder.

          "Bidder Contributed Cash" is defined in Section 2A.9 of the Formation
Agreement.

                                       2
<PAGE>

          "Bidder Contributed Shares" shall mean those shares of Bidder Common
Stock, if any, contributed to the Company by Bidder Member pursuant to Section
2A.9 of the Formation Agreement, and including all changes in the Bidder
Contributed Shares by reason of dividends payable in stock of Bidder,
distributions, issuances of stock, stock splits, recapitalizations,
reorganizations, mergers, consolidations, combinations, exchanges or other
similar changes with regard to Bidder Common Stock occurring following the
Effective Date, and together with all cash, securities (and rights and interests
therein) and other property received or distributed.

          "Bidder HoldCo Interest" is defined in Section 2.1 of the Formation
Agreement.

          "Bidder HoldCo Interest Purchaser" is defined in Section 8.5.

          "Bidder Member" is defined in the Preamble.

           "Bidder Offer" is defined in Section 8.3.

          "Bidder Services Agreement" is defined in Section 3.5 of the Formation
Agreement.

          "Build-to-Suit Agreement" is defined in Section 3.5 of the Formation
Agreement.

          "Business Plan" is defined in Section 10.3.

          "Capital Contribution" is defined in Section 6.1.

          "Closing" (and "Closings") are defined in Section 4.1 of the Formation
Agreement.

          "Contributed Cash Distribution" is defined in Section 2.6 of the
Formation Agreement.

          "CPI" means the Consumer Price Index for All Urban Consumers, U.S.
City Average, for All Items (1982-1984 = 100), as published by the Bureau of
Labor Statistics of the U.S. Department of Labor, and any successor index.  If
the CPI is discontinued and there is no successor index, Thrasher shall in good
faith select a comparable index to replace the CPI and the index selected by
Thrasher shall be subject to Bidder's approval, which approval-shall not be
unreasonably withheld or delayed.

          "Effective Date" is defined in the Preamble.

          "Encumbrance" means any lien, mortgage, security interest, pledge,
restriction on transferability, defect of title, option or other claim, charge
or encumbrance of any nature whatsoever on any property or property interest.

                                       3
<PAGE>

          "Exchange Act" is defined in Section 10.4(a).

          "Excess Cash Distribution" is defined in Section 8.1.11 of the
Formation Agreement."

          "Fair Market Value" is defined in Section 9.5(b).

          "Final Closing" means the final Closing to occur under the Formation
Agreement.

          "Formation Agreement" is defined in the Preamble.

          "GAAP" is defined in Section 3.8(e).

          "Global Lease Agreement" is defined in Section 3.4 of the Formation
Agreement.

          "Governmental Authority" means any federal, state, territorial,
county, municipal, local or other government or governmental agency or body or
any other type of regulatory body, whether domestic or foreign, including
without limitation the Federal Communications Commission, or any successor
Governmental Authority and the Federal Aviation Administration, or any successor
Governmental Authority.

          "HoldCo" is defined in the Preamble.

          "HoldCo Sub" is defined in the Preamble.

          "HoldCo Sub Operating Agreement" shall mean the Operating Agreement
forming HoldCo Sub entered into as of January 31, 2000 by HoldCo.

          "Incurred Debt" is defined in Section 2A.9(b) of the Formation
Agreement.

          "Initial Closing" means the first Closing to occur under the Formation
Agreement.

          "Initial Closing Date" means the date of the Initial Closing.

          "Initial Transferring Entities" means those Transferring Entities
participating in the Initial Closing.

          "Lender" shall mean collectively the financial institutions from which
HoldCo Sub borrows the Incurred Debt, if any.

                                       4
<PAGE>

          "Management Agreement" is defined in Section 2.4 of the Formation
Agreement.

          "Managers" is defined in Section 1.2.

          "Members" is defined in the Preamble.

          "Membership Interest" is defined in Section 6.1.

          "OpCo" is defined in the Preamble.

          "OpCo Towers" is defined in Section 10.3.

          "Percentage Interest" is defined in Section 6.1.

          "Permitted HoldCo Capital Contribution" is defined in Section 2.2(c)
of the Formation Agreement."

          "Person" means any natural person or entity.

          "Solvent" is defined in Section 3.8(c).

          "Taxes" means all taxes, duties, charges, fees, levies or other
assessments imposed by any taxing authority, whether domestic or foreign,
including, without limitation, income (net, gross or other including recapture
of any tax items such as investment tax credits), alternative or add-on minimum
tax, capital gains, gross receipts, value-added, excise, withholding, personal
property, real estate, sale, use, ad valorem, license, lease, service,
severance, stamp, transfer, payroll, employment, customs, duties, alternative,
add-on minimum, estimated and franchise taxes (including any interest, levies,
charges, penalties or additions attributable to or imposed on or with respect to
any such assessment).

          "Thrasher" means GTE Wireless Incorporated.

          "Thrasher Affiliate Member" means GTE Wireless of Houston
Incorporated.

          "Thrasher HoldCo Interest" is defined in Section 2.2 of the Formation
Agreement.

          "Thrasher HoldCo Interest Purchaser" is defined in Section 8.5.

          "Thrasher Interest Value" is defined in Section 2.2 of the Formation
Agreement.

                                       5
<PAGE>

          "Thrasher Member" means a corporation directly or indirectly owned by
Thrasher and identified on Schedule A, as amended from time to time.

          "Thrasher Offer" is defined in Section 8.4.

          "Thrasher Parent" is GTE Corporation or any successor thereto.

          "Thrasher Retained Interest" shall mean the .001 Percentage Interest
in OpCo held by a Thrasher Affiliate Member.

          "Total Entity Value" is defined in Section 2.2 of the Formation
Agreement.

          "Transaction Documents" means, collectively, the Formation Agreement,
the Global Lease, the Build-to-Suit Agreement, the Bidder Services Agreement,
the Management Agreement and each of the other documents and agreements listed
in Section 4.2 and 4.3 of the Formation Agreement.

          "Transferring Corporations" is defined in Article 1 of the Formation
Agreement.

          "Transferring Entities" means the Transferring Partnerships and the
Transferring Corporations.  The Transferring Entities are referred to
individually herein as a "Transferring Entity."

          "Transferring Partnerships" is defined in Article 1 of the Formation
Agreement.

          "Working Capital Contribution" is defined in Section 2A.9(b) of the
Formation Agreement.

     Section 1.2  FORMATION.  Upon the filing of the Certificate of Formation
(the "Certificate") with the Secretary of State of the State of Delaware, the
Initial Transferring Entities and Bidder Member have formed Crown Castle GT
Holding Company LLC, a limited liability company, pursuant to the Delaware
Limited Liability Company Act of 1992, as amended from time to time (the "Act"),
for the purposes hereinafter set forth.  Each of the Transferring Partnerships
that initially received an interest in the Company, after the filing of the
Certificate and prior to the execution and delivery of this Agreement,
transferred all of its respective interests in the Company to a Thrasher Member.
The Company was formed as a limited liability company managed by its managers
(the "Managers") who are identified on Schedule C under the supervision of the
Board of Representatives (as defined in Section 1.10) and the laws of the State
of Delaware, upon the terms and conditions hereinafter set forth. The Members
intend that the Company shall be taxed as a partnership for federal, state and
local income tax purposes. Promptly following the execution hereof, the Members
shall execute or cause to be executed all other necessary certificates and
documents, and shall make all such

                                       6
<PAGE>

filings and recordings, and shall do all other acts as may be necessary or
appropriate from time to time to comply with all requirements for the formation,
continued existence and operation of a limited liability company in the State of
Delaware. This Operating Agreement is intended to serve as a "limited liability
company agreement" as such term is defined in (S) 18-101(7) of the Act.

     Section 1.3  COMPANY NAME AND ADDRESS.  The Company shall do business under
the name Crown Castle GT Holding Company LLC or such other name as the Board of
Representatives may determine from time to time. The Board of Representatives
shall promptly notify the Members of any change of name of the Company. The
initial registered agent for the Company shall be CT Corporation System. The
initial registered office of the Company in the State of Delaware shall be
1209 Orange Street, Wilmington, Delaware 19801. The registered office and the
registered agent may be changed from time to time by action of the Board of
Representatives by filing notice of such change with the Secretary of State of
the State of Delaware. The Board of Representatives will promptly notify the
Members of any change of the registered office or registered agent. The Company
may also have offices at such other places within or outside of the State of
Delaware as the Board of Representatives may from time to time determine.

     Section 1.4  TERM.  The Company shall commence operating as of the date the
Certificate is filed with the Secretary of the State of Delaware, and, shall
have perpetual existence unless terminated or dissolved pursuant to Section 9.1
of this Operating Agreement.

     Section 1.5  BUSINESS OF THE COMPANY.  The purpose of the Company is to
(i) accept the Capital Contributions and further contribute such amounts other
than the Bidder Contributed Cash (reduced by the Working Capital Contribution)
and the Bidder Contributed Shares, if applicable, to HoldCo Sub, (ii) make the
Contributed Cash Distributions and the Financing Distributions, if applicable,
each as defined in the Formation Agreement and (iii) to own (A) one hundred
percent (100%) of the percentage interests in HoldCo Sub and (B) the Bidder
Contributed Shares, if applicable. Following completion of the transactions
described in the Formation Agreement, the Company shall not engage in any line
of business except for (i) the ownership of the membership interests in, and
operation and management of, HoldCo Sub and any and all activities ancillary or
related thereto, or (ii) the ownership of the Bidder Contributed Shares, if
applicable. The Company shall possess and may exercise all the powers and
privileges granted by the Act or by any other law, together with any powers
incidental thereto, so far as such powers and privileges are necessary or
convenient to the conduct, promotion or attainment of the business, purposes or
activities of the Company.

     Section 1.6  NAMES AND ADDRESSES OF THE MEMBERS.  The names and addresses
of the Members are set forth in Schedule A, as such shall be amended from time
to time.

                                       7
<PAGE>

     Section 1.7  PARTITION.  No Member, nor any successor-in-interest to any
Member, shall have the right, while this Operating Agreement remains in effect,
to have the property of the Company partitioned, or to file a complaint or
institute any proceeding at law or in equity to have the property of the Company
partitioned, and each of the Members, on behalf of itself and its successors,
representatives and assigns, hereby irrevocably waives any such right.

     Section 1.8  FISCAL YEAR.  The fiscal year of the Company shall begin on
January 1 and end on December 31 of each calendar year.

     Section 1.9  TITLE TO COMPANY PROPERTY  All property owned by the Company,
whether real or personal, tangible or intangible, shall be deemed to be owned by
the Company, and no Member individually shall have any interest in such
property. Title to all such property may be held in the name of the Company or a
designee, which designee may be a Member or an entity affiliated with a Member.

     Section 1.10  BOARD OF REPRESENTATIVES.

          (a) General.  A Board of Representatives (the "Board of
Representatives") shall be established to oversee the Managers and review the
Business Plan (as defined in Section 10.3). There shall be no less than five (5)
Representatives, nor more than fifteen (15) Representatives, as may be
determined from time to time by the Board of Representatives. Initially, there
shall be six (6) Representatives. Each Member shall designate that number of
Representatives determined by multiplying the total number of Representatives by
that Member's Percentage Interest in the Company and rounding to the nearest
whole number. If such calculation shall result in a greater number of
Representatives than the total to be designated, then the Board of
Representatives shall be expanded to the extent permitted by the second sentence
of this Section 1.10(a) or if, despite such expansion, there would still be a
greater number of Representatives than the total to be designated, the Members
shall by vote determine a proportionate readjustment with each Member entitled
to a number of votes equal to its Percentage Interest. Notwithstanding the
foregoing, for so long as the Thrasher Members in the aggregate maintain
ownership of at least a five percent (5%) Percentage Interest in the Company,
the Thrasher Members shall have the right to designate from time to time a
number of Representatives that is equal to the greater of (i) one (1)
Representative or (ii) the number of Representatives (rounded to the nearest
whole number) which is equal to the same percentage of all Representatives as
the Percentage Interest in the Company held by the Thrasher Members in the
aggregate.  Initially, the Thrasher Members shall designate two (2)
Representatives and Bidder Member shall designate four (4) Representatives.

          (b) Representatives and Alternates  Each Member shall also be entitled
to designate one (1) alternate to each such Representative (each an
"Alternate").  In the event a Representative is unable to attend a meeting of
the Board of Representatives or otherwise participate in any action to be taken
by the Board of Representatives, the Alternate associated with such
Representative shall take such Representative's place for all purposes on the
Board of Representatives. Each Member shall designate its

                                       8
<PAGE>

Representatives and the associated Alternates by written notice to the Company
and each other Member. The initial Representatives and Alternates of each Member
are set forth on Schedule B. The Representatives and Alternates shall at all
times be executive officers or other full-time employees of either such Member
or any affiliate of such Member. For so long as the Thrasher Members have the
right to designate at least one (1) Representative, the Representatives and
Alternates of the Company shall also serve as the Representatives and Alternates
of HoldCo Sub and OpCo.

          (c) Resignation.  A Representative or Alternate of the Company may
resign at any time by giving written notice to the Company or to the Member who
designated such Representative or Alternate.

          (d) Removal.  Each Member may, at any time, replace any of its
Representatives or Alternates with a new Representative or Alternate and, upon
such change or upon the death or resignation of any Representative or Alternate,
a successor shall be designated in writing by the Member that appointed the
Representative or Alternate being replaced.

          (e) Vacancies.  Any vacancy with respect to any Representative or
Alternate occurring for any reason may be filled by the Member who designated
the Representative or Alternate who vacated or was removed from his or her
position.

          (f) Compensation.  Without the approval of the Members, the
Representatives or Alternates will not be entitled to compensation for their
services as Representatives or Alternates.  The Company shall, however,
reimburse the Representatives and Alternates for their reasonable expenses
incurred in connection with their services to the Company.

                                   ARTICLE II

                               MEETINGS GENERALLY

     Section 2.1  MANNER OF GIVING NOTICE.

          (a) A notice of meeting shall specify the place, day and hour of the
meeting and any other information required by any provision of the Act, the
Certificate or this Operating Agreement.

          (b) When a meeting at which there is a duly constituted quorum is
adjourned, it shall not be necessary to give any notice of the adjourned meeting
or of the business to be transacted at an adjourned meeting, other than by
announcement at the meeting at which the adjournment is taken, unless the
adjournment is for more than sixty (60) days in which event notice shall be
given in accordance with Section 2.2 or Section 2.3, as applicable.

                                       9
<PAGE>

     Section 2.2  NOTICE OF MEETINGS OF THE BOARD OF REPRESENTATIVES.  Notice of
every meeting of the Board of Representatives shall be given to each
Representative by telephone or in writing at least 24 hours (in the case of
notice by telephone, telex or facsimile transmission) or 48 hours (in the case
of notice by telegraph, courier service or express mail) or five (5) days (in
the case of notice by first class mail) before the time at which the meeting is
to be held. Every such notice shall state the time and place of the meeting.
Subject to the provisions of Sections 3.3 and 4.5, neither the business to be
transacted at, nor the purpose of, any meeting of the Board of Representatives
need be specified in a notice of the meeting.

     Section 2.3  NOTICE OF MEETINGS OF MEMBERS.  Written notice of every
meeting of the Members shall be given to each Member of record entitled to vote
at the meeting at least five (5) days prior to the day named for the meeting. If
the Managers neglect or refuse to give notice of a meeting, the person or
persons calling the meeting may do so.

     Section 2.4  WAIVER OF NOTICE.

          (a) Whenever any written notice is required to be given under the
provisions of the Act, the Certificate or this Operating Agreement, a waiver
thereof in writing, signed by the person or persons entitled to the notice,
whether before or after the time stated therein, shall be deemed equivalent to
the giving of the notice. Neither the business to be transacted at, nor the
purpose of, a meeting need be specified in the waiver of notice of the meeting.

          (b) Attendance of a person at any meeting shall constitute a waiver of
notice of the meeting except where a person attends a meeting for the express
purpose of objecting, at the beginning of the meeting, to the transaction of any
business because the meeting was not lawfully called or convened.

     Section 2.5  USE OF CONFERENCE TELEPHONE AND SIMILAR EQUIPMENT.  Any
Representative may participate in any meeting of the Board of Representatives,
and any Member may participate in any meeting of the Members, by means of
conference telephone or similar communications equipment by means of which all
persons participating in the meeting can hear each other. Participation in a
meeting pursuant to this Section shall constitute presence in person at the
meeting.

     Section 2.6  CONSENT IN LIEU OF MEETING.  Any action required or permitted
to be taken at a meeting of the Board of Representatives or Members may be taken
without a meeting if, prior or subsequent to the action, written consents
describing the action to be taken are signed by the minimum number of
Representatives or Members that would be necessary to authorize the action at a
meeting at which all Representatives or Members entitled to vote thereon were
present and voting; provided that, prior to any such written consent becoming
effective, such written consent has been provided to all Representatives or
Members entitled to vote, and the Representatives or Members shall have ten (10)
days to review such consent prior to such written consent becoming effective
(unless otherwise agreed to by all Representatives or their respective
Alternates

                                       10
<PAGE>

or each Member, respectively). The consents shall be filed with the Managers.
Prompt notice of the taking of the Company action without a meeting by less than
unanimous written consent shall be given to those Members who have not consented
in writing.

                                  ARTICLE III

                                   MANAGEMENT

     Section 3.1  MANAGEMENT OF THE COMPANY GENERALLY.  The business and affairs
of the Company shall be managed by its Managers under the supervision of the
Board of Representatives (a) in accordance with the provisions of this Operating
Agreement and the Business Plans and the other resolutions and directives of the
Board of Representatives adopted by the Board of Representatives and in effect
from time to time, and (b) subject to the provisions of the Act, the Certificate
and this Operating Agreement including, without limitation, the provisions of
Section 3.8 hereof.  Unless authorized to do so by this Operating Agreement or
by the Board of Representatives or the Managers of the Company (provided that
the Managers are authorized to grant such authority), no attorney-in-fact,
employee, officer or agent of the Company other than the Managers shall have any
power or authority to bind the Company in any way, to pledge its credit or to
render it liable pecuniarily for any purpose. No Member shall have any power or
authority to bind the Company unless the Member has been expressly authorized by
the Board of Representatives to act as an agent of the Company. All Managers of
the Company, as between themselves and the Company, shall have such authority
and perform such duties in the management of the Company as may be provided by
or pursuant to resolutions or orders of the Board of Representatives or in the
Business Plan, or, in the absence of controlling provisions in the resolutions
or orders of the Board of Representatives, as may be determined by or pursuant
to this Operating Agreement.  The Board of Representatives may confer upon any
Manager such titles as the Board deems appropriate, including, but not limited
to, President, Vice President, Secretary or Treasurer, and subject to the
limitations set forth in Section 3.8 of this Operating Agreement, delegate
specifically defined duties to the Managers.  Notwithstanding the foregoing or
any other provision of this Operating Agreement or of the Act to the contrary,
no Manager of the Company shall have the power or authority to do or perform any
act with respect to any of the matters set forth in Section 3.8 of this
Operating Agreement unless such matter has been approved by the mutual consent
of the Thrasher Members and Bidder Member in accordance with the provisions of
this Operating Agreement.

     Section 3.2  MEETINGS OF THE BOARD OF REPRESENTATIVES.  Meetings of the
Board of Representatives shall be held at such time and place within or without
the State of Delaware as shall be designated from time to time by resolution of
the Board of Representatives or by written notice of any Manager or by written
notice of any Member; provided that meetings of the Board of Representatives
shall be held no less than quarterly, on a date to be determined by the mutual
consent of the Thrasher Members and Bidder Member. At each meeting of the Board
of Representatives, the Managers shall (i) provide the Board of Representatives
with a report on the financial condition and

                                       11
<PAGE>

operations of the Company, including, without limitation, a report on the
results of operations compared to the then applicable Business Plan,
(ii) disclose to the Board of Representatives any material event or contingency
occurring since the previous meeting and (iii) disclose to the Board of
Representatives all matters which would require disclosure to, or the approval
of, the board of directors of a Delaware corporation. For so long as the
Thrasher Members are entitled to designate at least one (1) Representative to
the Board of Representatives of the Company, any meeting of the Board of
Representatives of the Company shall also be deemed to be a meeting of the
Boards of Representatives of HoldCo Sub and OpCo.

     Section 3.3  QUORUM.  The presence of at least one of the Representatives
or Alternates designated by each of the Thrasher Members and Bidder Member shall
be necessary to constitute a quorum for the transaction of business at a meeting
of the Board of Representatives and the acts of a majority of the
Representatives or Alternates present and voting at a meeting at which a quorum
is present shall be the acts of the Representatives or Alternates; provided,
however, that if notice of a meeting is provided to the Representatives and
Alternates, and such notice describes the business to be considered, the actions
to be taken and the matters to be voted on at the meeting in reasonable detail,
and insufficient Representatives or Alternates attend the meeting to constitute
a quorum, the meeting may be adjourned by those Representatives or Alternates
attending such meeting for a period not to exceed twenty (20) days. Such meeting
may be reconvened by providing notice of the reconvened meeting to the
Representatives and Alternates no less than ten (10) days prior to the date of
the meeting specifying that the business to be considered, the actions to be
taken and the matters to be voted upon are those set forth in the notice of the
original adjourned meeting. If, at the reconvened meeting, a quorum of
Representatives or Alternates is not present, a majority of the Representatives
and Alternates present and voting will constitute a quorum for purposes of the
reconvened meeting; provided, however that such Representatives and Alternates
may only consider the business, take the actions or vote upon the matters set
forth in the notice of the original meeting.  Notwithstanding the foregoing or
any other provision in this Agreement, no Representative, Alternate or Manager
shall have any power or authority to do or perform any act with respect to any
of the matters set forth in Section 3.8 of this Operating Agreement unless such
matter has been approved by the mutual consent of the Thrasher Members and
Bidder Member in accordance with the provisions of this Operating Agreement.

     Section 3.4  MANNER OF ACTION.  Other than any action contemplated by
Section 3.8, which shall require the mutual consent of Bidder Member and the
Thrasher Members, whenever any Company action is to be taken by a vote of the
Board of Representatives, it shall be authorized upon receiving the affirmative
vote of a majority of the Representatives and Alternates present and voting at a
duly constituted meeting at which a quorum is present.

     Section 3.5  DESIGNATION OF MANAGERS.  Bidder Member shall designate all
Managers. The initial Managers are set forth on Schedule C.  Bidder Member shall
promptly give each Member notice of the designation of any new Manager.

                                       12
<PAGE>

     Section 3.6  QUALIFICATIONS.  Each Manager of the Company shall be a
natural person of full age who need not be a resident of the State of Delaware.

     Section 3.7  NUMBER, SELECTION AND TERM OF OFFICE.

          (a) There shall be no less than 2 Managers, nor more than 10, as may
be determined from time to time by the Board of Representatives. Initially,
there shall be 3 Managers.

          (b) Each Manager shall hold office until a successor has been selected
and qualified or until his or her earlier death, resignation or removal.

     Section 3.8  APPROVAL OF CERTAIN MATTERS BY THE MEMBERS.  Notwithstanding
any provision of this Operating Agreement or the Act to the contrary, the
following matters require the mutual consent of the Thrasher Members and Bidder
Member, given by their respective Representatives (acting as a group) at a
meeting of the Board of Representatives or by written consent, or if the
Thrasher Members have no Representatives, such consent shall be given by the
Thrasher Members in their capacity as Members, and the Managers shall have no
power or authority to do or perform any act with respect to any of the following
matters without the mutual consent of the Thrasher Members and Bidder Member,
given in accordance with the provisions of this Operating Agreement:

          (a) Certain Contracts.  The entering into any contract, agreement or
arrangement (whether written or oral) by the Company, other than agreements and
contracts in force as of the date hereof and renewals thereof, which
(i) contains provisions restricting HoldCo or HoldCo Sub or any member thereof
from competing in any business activity in any geographic area, (ii) contains
provisions requiring HoldCo or HoldCo Sub or any member thereof to deal
exclusively with any third party with respect to providing any goods, services
or rights to or acquiring any goods or services or rights from such third party,
(iii) contains provisions which are inconsistent with the obligations of HoldCo
or HoldCo Sub under any of the Transaction Documents, or (iv) provides for the
purchase or sale of goods, services or rights involving an amount in excess of
$10,000,000 per year in any transaction or series of similar transactions.

          (b) Conduct of Business. The engagement by the Company in any line of
business other than (i) the ownership of the membership interests in HoldCo Sub,
(ii) the ownership of the Bidder Contributed Shares, if applicable and (iii) the
making of any Contributed Cash Distributions. The engagement by HoldCo Sub in
any line of business other than performing its obligations under the Management
Agreement and performing all business activities related thereto, and the
holding of an interest in OpCo. The making by HoldCo Sub of any investment in,
or the acquisition by HoldCo Sub of any equity securities of, any Person other
than OpCo.  The application of any money or other assets of HoldCo or HoldCo Sub
for use in the business of any person other than HoldCo, HoldCo Sub or OpCo,
including, without limitation, Bidder or any Bidder Affiliate

                                       13
<PAGE>

whether by loan, lease or other means. Causing the operation of the Tower Sites
indirectly held or managed by HoldCo in a manner other than a manner that is no
less favorable and no less competitive than the manner in which Bidder and
Bidder Member conduct the tower operations of their other businesses.

          (c) Solvency.  The voluntary taking of any action by the Company or
HoldCo Sub that would cause the Company, HoldCo Sub or OpCo to cease to be
Solvent.  As used herein, the term "Solvent" means that the aggregate present
fair saleable value of the Company's (or HoldCo Sub's, as applicable) assets is
in excess of the total cost of its probable liability on its existing debts to
third parties as they become absolute and matured, the Company (or HoldCo Sub,
as applicable) has not incurred debts beyond its foreseeable ability to pay such
debts as they mature, and the Company (or HoldCo Sub, as applicable) has capital
adequate to conduct the business in which it is presently employed.  The taking
of any action that would inhibit, prevent or give rise to any claim with respect
to the making any Contributed Cash Distribution.

          (d) Bankruptcy.  The voluntary dissolution or liquidation of the
Company or HoldCo Sub, the making by the Company or HoldCo Sub of a voluntary
assignment for the benefit of creditors, the filing of a petition in bankruptcy
by the Company or HoldCo Sub, the Company or HoldCo Sub petitioning or applying
to any tribunal for any receiver or trustee, the Company or HoldCo Sub
commencing any proceeding relating to itself under any bankruptcy,
reorganization, readjustment of debt, dissolution or liquidation law or statute
of any jurisdiction, the Company or HoldCo Sub indicating its consent to,
approval of or acquiescence in any such proceeding and failing to use their
respective best efforts to have discharged the appointment of any receiver of or
trustee for the Company or HoldCo Sub or any substantial part of their
respective properties.

          (e) Indebtedness.  The direct or indirect modification, amendment or
prepayment of the Incurred Debt, if any, by the Company or HoldCo Sub prior to
the seventh (7th) anniversary of the last closing of the transactions
contemplated by the Formation Agreement.  Except with respect to Incurred Debt,
if any, the Company directly or indirectly, creating, incurring, assuming,
guaranteeing, or otherwise becoming or remaining directly or indirectly liable
with respect to any Indebtedness. As used herein, "Indebtedness" means, at any
time, (i) liabilities for borrowed money, (ii) liabilities for the deferred
purchase price of property acquired by the Company (excluding accounts payable
arising in the ordinary course of business but including all liabilities created
or arising under any conditional sale or other title retention agreement with
respect to any such property); (iii) all liabilities appearing on its balance
sheet in accordance with generally accepted accounting principles consistently
applied throughout the periods involved ("GAAP") in respect of capital leases;
(iv) all liabilities for borrowed money secured by any Encumbrance with respect
to any property owned by the Company (whether or not it has assumed or otherwise
become liable for such liabilities); (v) all liabilities in respect of letters
of credit or instruments serving a similar function issued or accepted for its
account by banks and other financial institutions (whether or not

                                       14
<PAGE>

representing obligations for borrowed money); (vi) any guaranty of the Company
with respect to liabilities of a type described in any of clauses (i) through
(v) hereof.

          (f) Liens.  The Company, directly or indirectly, maintaining,
creating, incurring, assuming or permitting to exist any Encumbrance (other than
Encumbrances on the membership interests in HoldCo Sub granted to the Lender or
to secure the Incurred Debt, if any), on or with respect to any property or
asset (including any document or instrument in respect of goods or accounts
receivable) of the Company, whether now owned or hereafter acquired, or any
income or profits therefrom.

          (g) Issuance of Interests.  Except pursuant to a transfer permitted by
Section 8.1 or Section 8.2, the authorization or issuance of any interests in,
or the admission of any members to, the Company or HoldCo Sub, including,
without limitation, the authorization or issuance of any additional interests in
the Company to Thrasher or any Thrasher Member or Bidder Member beyond those
interests authorized and issued in connection with the formation of the Company.

          (h) Contingent Obligations.  The Company, directly or indirectly,
creating or becoming or being liable with respect to any Contingent Obligation.

As used herein, the term "Contingent Obligations" means any direct or indirect
liability, contingent or otherwise (i) with respect to any indebtedness, lease,
dividend or other obligation of another if the primary purpose or intent thereof
is to provide assurance to the obligee of such obligation of another that such
obligation of another will be paid or discharged, or that any agreements
relating thereto will be complied with, or that the holders of such obligations
will be protected (in whole or in part) against loss in respect thereof and
(ii) with respect to any letter of credit. Contingent Obligations shall include
with respect to the Company, without limitation, the direct or indirect
guaranty, endorsement (otherwise than for the collection or deposit in the
ordinary course of business), co-making, discounting with recourse or sale with
recourse by the Company, the obligation to make take-or-pay or similar payments
if required regardless of non-performance by any other party or parties to an
agreement, and any liability of the Company for the obligations of another
through any agreement (contingent or otherwise) (x) to purchase, repurchase or
otherwise acquire such obligation or any security therefor, or to provide funds
for the payment or discharge of such obligation (whether in the form of loans,
advances, stock purchases, capital contributions or otherwise), and (y) to
maintain the solvency or any balance sheet item, level of income or financial
condition of another, if in the case of any agreement described under subclause
(x) or (y) of this sentence, the primary purpose or intent thereof is as
described in the preceding sentence.

          (i) Preservation of Existence.  Any action contrary to the
preservation and maintenance of the Company's and HoldCo Sub's existence,
rights, franchises and privileges as a limited liability company under the laws
of the State of Delaware. Any action which would prevent the Company or HoldCo
Sub from qualifying and remaining qualified as a foreign limited liability
company in each jurisdiction in which such

                                       15
<PAGE>

qualification is necessary or desirable in view of its business and operations
or the ownership or lease of its properties.

          (j) Merger or Sale of Assets. Any merger or consolidation by the
Company or HoldCo Sub with any Person. Any sale, assignment, lease or other
disposition by the Company or HoldCo Sub of (whether in one transaction or in a
series of transactions), or any voluntarily parting with the control of (whether
in one transaction or in a series of transactions), a material portion of the
Company's or HoldCo Sub's assets (whether now owned or hereinafter acquired),
except in accordance with the provisions of any of the Transaction Documents,
and except for sales or other dispositions of assets in the ordinary course of
business. Any sale, assignment or other disposition of (whether in one
transaction or in a series of transactions) any of the Company's or HoldCo Sub's
accounts receivable (whether now in existence or hereinafter created) at a
discount or with recourse, to any Person, except for sales or other dispositions
of assets in the ordinary course of business.

          (k) Dealings with Affiliates.  Except pursuant to the Transaction
Documents, the entering into by the Company or HoldCo Sub of any transaction
with any Representative, Manager, officer or member of the Company, HoldCo Sub
or OpCo, or any officer, director of Bidder or Bidder Member or holder of more
than five percent (5%) of the outstanding common stock of Bidder, or any member
of their respective immediate families or any corporation or other entity
directly or indirectly controlled by one or more of such officers, directors or
stockholders or members of their immediate families or any corporation or other
entity directly or indirectly controlled by Bidder or Bidder Member, except in
the ordinary course of business and on terms not less favorable to the Company
or HoldCo Sub than it would reasonably expect to obtain in a transaction between
unrelated parties.

          (l) Dividends; Distributions.  The declaration or payment by the
Company or HoldCo Sub of any dividend, or making by the Company or HoldCo Sub of
any distribution or return of capital, or the redemption by the Company or
HoldCo Sub of any equity interest, or the making by the Company or HoldCo Sub of
any similar payments or transfer of property to its Members (excluding payments
for goods or services) in amounts in excess of those amounts which would
otherwise be payable under the Management Agreement and then only to the extent
that such amounts had not been paid pursuant to the Management Agreement.

          (m) Method of Certain Calculations.  The determination of any method
to be used in calculating any of the payments to be made under the Management
Agreement or the Bidder Services Agreement.

          (n) Business Plan.  The approval of the Business Plan as set forth in
Section 10.3.

                                       16
<PAGE>

          (o) Actions as Member of HoldCo Sub.  The Company giving any consent,
in its capacity as a member of HoldCo Sub, under Section 3.8 of the HoldCo Sub
Operating Agreement.

          (p) Voting of Bidder Contributed Shares held by the Company.  The
Company exercising any voting rights with respect to the Bidder Contributed
Shares, if any, held by the Company, and in the absence of the mutual agreement
of Thrasher and Bidder Member as to the exercise of such voting rights, the
Bidder Contributed Shares shall be voted on each matter to be submitted to a
vote of the stockholders of Bidder or and against such matter in the same
proportion as the vote of all other shares entitled to vote thereon are voted
(whether by proxy or otherwise) for and against such matter.

Whenever the mutual consent of the Thrasher Members and Bidder Member is
required under either this Operating Agreement, the HoldCo Sub Operating
Agreement or the OpCo Operating Agreement, the Managers shall only take action,
vote the membership interests in HoldCo Sub or authorize the Managers of HoldCo
Sub to vote the membership interest in OpCo in accordance with the direction of
the Thrasher Members and Bidder Member as provided for in this Section 3.8.

     Section 3.9  EXCULPATION.  No Member, Manager, Representative, Alternate or
officer shall be liable to the Company or to any Member for any losses, claims,
damages or liabilities arising from, related to, or in connection with, this
Operating Agreement or the business or affairs of the Company, except for any
losses, claims, damages or liabilities as are determined by final judgment of a
court of competent jurisdiction to have resulted from such Member, Manager,
Representative, Alternate or officer's gross negligence or willful misconduct.
To the extent that, at law or in equity, any Member, Manger, Representative,
Alternate or officer has duties (including fiduciary duties) and liabilities
relating thereto to the Company or to any Member, such Member, Manager,
Representative, Alternate or officer acting in connection with this Operating
Agreement or the business or affairs of the Company shall not be liable to the
Company or to any Member, Manager, Representative, Alternate or officer for its
good faith conduct in accordance with the provisions of this Agreement or any
approval or authorization granted by the Company or any Member, Manager,
Representative, Alternate or officer. The provisions of this Operating
Agreement, to the extent that they restrict the duties and liabilities of any
Member, Manager, Representative, Alternate or officer otherwise existing at law
or in equity, are agreed by the Members to replace such other duties and
liabilities of such Member, Manager, Representative, Alternate or officer.

     Section 3.10  RELIANCE ON REPORTS AND INFORMATION BY MEMBER,
REPRESENTATIVE. ALTERNATE OR MANAGER.  A Member, Representative, Alternate or
Manager of the Company shall be fully protected in relying in good faith upon
the records of the Company and upon such information, opinions, reports or
statements presented to the Company by any of its other Managers, Members,
Representatives, Alternates, officers, employees or committees of the Company,
or by any other person, as to matters the Member, Representative, Alternate or
Manager reasonably believes are within such other person's professional or
expert competence and who has been selected

                                       17
<PAGE>

with reasonable care by or on behalf of the Company, including information,
opinions, reports or statements as to the value and amount of the assets,
liabilities, profits or losses of the Company or any other facts pertinent to
the existence and amount of assets from which distributions to Members might
properly be paid.

     Section 3.11  BANK ACCOUNTS.  The Managers may from time to time open bank
accounts in the name of the Company, and the Managers, or any of them, shall be
the sole signatory or signatories thereon, unless the Managers determine
otherwise.

     Section 3.12  RESIGNATION.  A Manager of the Company may resign at any time
by giving written notice to the Company. The resignation of a Manager shall be
effective upon receipt of such notice or at such later time as shall be
specified in the notice. Unless otherwise specified in the notice, the
acceptance of the resignation shall not be necessary to make such resignation
effective.

     Section 3.13  REMOVAL.  Any individual Manager may be removed from office
at any time, without assigning any cause, by Bidder Member.

     Section 3.14  VACANCIES.  Any vacancy with respect to a Manager occurring
for any reason may be filled by Bidder Member.

     Section 3.15  SALARIES.  The salaries of the Managers shall be fixed from
time to time by the Board of Representatives in accordance with the Business
Plan or by such Manager as may be designated by resolution of the Board of
Representatives. The salaries or other compensation of any other employees and
other agents shall be fixed from time to time by the Board of Representatives or
by such Manager as may be designated by resolution of the Board of
Representatives.

                                   ARTICLE IV

                                    MEMBERS

     Section 4.1  ADMISSION OF MEMBERS.

          (a) A person acquiring an interest in the Company in connection with
its formation shall be admitted as a Member of the Company upon the later to
occur of the formation of the Company or when the admission of the person is
reflected in the records of the Company.

          (b) After the formation of the Company, a person acquiring an interest
in the Company from the Company, is admitted as a Member upon the satisfaction
of all requirements in Article VIII of this Operating Agreement.

     Section 4.2  MEETINGS.  Meetings of the Members, for any purpose or
purposes, unless otherwise prescribed by statute, may be called by any Manager
or by any Member.

                                       18
<PAGE>

     Section 4.3  PLACE OF MEETING.  The Managers or Members calling a meeting
pursuant to Section 4.2 may designate any place as the place for any meeting of
the Members. If no designation is made, the place of meeting shall be the
principal office of the Company.

     Section 4.4  RECORD DATE.  For the purpose of determining Members entitled
to notice of, or to vote at, any meeting of Members or any adjournment of the
meeting, or Members entitled to receive payment of any distribution, or to make
a determination of Members for any other purpose, the date on which notice of
the meeting is mailed or the date on which the resolution declaring the
distribution or relating to such other purpose is adopted, as the case may be,
shall be the record date for the determination of Members. Only Members of
record on the date fixed shall be so entitled notwithstanding any permitted
transfer of a Member's Membership Interest after any record date fixed as
provided in this Section. When a determination of Members entitled to vote at
any meeting of Members has been made as provided in this section, the
determination shall apply to any adjournment of the meeting.

     Section 4.5  QUORUM.  A meeting of Members of the Company duly called shall
not be organized for the transaction of business unless a quorum is present. The
presence of each Member, represented in person or by proxy, shall constitute a
quorum at any meeting of Members, provided, however, that if notice of a meeting
is provided to the Members, and such notice describes the business to be
considered, the actions to be taken and the matters to be voted on at the
meeting in reasonable detail, and insufficient Members attend the meeting to
constitute a quorum, the meeting may be adjourned by those Members attending
such meeting for a period not to exceed twenty (20) days. Such meeting may be
reconvened by providing notice of the reconvened meeting to the Members no less
than ten (10) days prior to the date of the meeting specifying that the business
to be considered, the actions to be taken and the matters to be voted upon are
those set forth in the notice of the original adjourned meeting. If, at the
reconvened meeting, a quorum of Members is not present, a majority of the
Members present and voting will constitute a quorum for purposes of the
reconvened meeting; provided, however that such Members may only consider the
business, take the actions or vote upon the matters set forth in the notice of
the original meeting. The Members present at a duly organized meeting may
continue to transact business until adjournment, notwithstanding the withdrawal
during the meeting of Members whose absence would cause less than a quorum.

Notwithstanding the foregoing or any other provision in this Agreement, no
Member shall have any power or authority to do or perform any act with respect
to any of the matters set forth in Section 3.8 of this Operating Agreement
unless such matter has been approved by the mutual consent of Thrasher Members
and Bidder Member in accordance with the provisions of this Operating Agreement.

     Section 4.6  MANNER OF ACTING.  Except as otherwise provided in the Act or
the Certificate or this Operating Agreement, including, without limitation,
Section 3.8 hereof, whenever any Company action is to be taken by vote of the
Members of the Company, it

                                       19
<PAGE>

shall be authorized upon receiving the affirmative vote of Members entitled to
vote who own a majority of the Percentage Interests then held by Members.

     Section 4.7  VOTING RIGHTS OF MEMBERS.  Unless otherwise provided in the
Certificate, every Member of the Company shall be entitled to a percentage of
the total votes equal to that Member's then current Percentage Interest.

     Section 4.8  RELATIONSHIP OF MEMBERS.  Except as otherwise expressly and
specifically provided in or as authorized pursuant to the Certificate or this
Operating Agreement, (a) in the event that any Member (or any of such Member's
shareholders, partners, members, owners, or Affiliates (collectively, the
"Liable Member")) has incurred any indebtedness or obligation prior to the date
of this Agreement that relates to or otherwise affects the Company, neither the
Company nor any other Member shall have any liability or responsibility for or
with respect to such indebtedness or obligation unless such indebtedness or
obligation is assumed by the Company pursuant to this Operating Agreement, the
Formation Agreement or any of the other Transaction Documents, or a written
instrument signed by all Members; (b) neither the Company nor any Member shall
be responsible or liable for any indebtedness or obligation that is incurred
after the date of this Agreement by any Liable Member, and in the event that a
Liable Member, whether prior to or after the date hereof, incurs (or has
incurred) any debt or obligation that neither the Company nor any of the other
Members is to have any responsibility or liability for, the Liable Member shall
indemnify and hold harmless the Company and the other Members from any liability
or obligation they may incur in respect thereof; (c) nothing contained herein
shall render any Member personally liable for any debts, obligations or
liabilities incurred by the other Members or the Company whether arising in
contract, tort or otherwise or for the acts or omissions of any other Member,
Manager, agent or employee of the Company; (d) no Member shall be constituted an
agent of the other Members or the Company; (e) nothing contained herein shall
create any interest on the part of any Member in the business or other assets of
the other Members; (f) nothing contained herein shall be deemed to restrict or
limit in any way the carrying on (directly or indirectly) of separate businesses
or activities by any Member now or in the future, even if such businesses or
activities are competitive with the Company; and (g) no Member shall have any
authority to act for, or to assume any obligation on behalf of, the other
Members or the Company. No Member or any of its affiliates or any of their
respective officers, directors, employees or former employees shall have any
obligation, or be liable, to the Company or any other Member for or arising out
of the conduct described in the preceding clause (f), for exercising, performing
or observing or failing to exercise, perform or observe, any of its rights or
obligations under the Formation Agreement or any other Transaction Document, for
exercising or failing to exercise its rights as a Member or, solely by reason of
such conduct, for breach of any fiduciary or other duty to the Company or any
Member. In the event that a Member, any of its Affiliates or any of their
respective officers, directors, employees or former employees acquires knowledge
of a potential transaction, agreement, arrangement or other matter which may be
a corporate opportunity for both the Member and the Company, neither the Member
nor such Affiliate, officers, directors, employees or former employees shall
have any duty to communicate or offer such corporate opportunity to the Company,
and

                                       20
<PAGE>

neither the Member nor such Affiliate, officers, directors, employees or
former employees shall be liable to the Company for breach of any fiduciary or
other duty, as a member or otherwise, by reason of the fact that the Member or
such Affiliate, officers, directors, employees or former employees pursue or
acquire such corporate opportunity for the Member, direct such corporate
opportunity to another person or entity or fail to communicate such corporate
opportunity or information regarding such corporate opportunity to the Company.

     Section 4.9  BUSINESS TRANSACTIONS OF MEMBER OR REPRESENTATIVE OR ALTERNATE
WITH THE COMPANY.  A Member or Representative or Alternate may lend money to,
act as a surety, guarantor or endorser for, guarantee or assume one or more
obligations of, provide collateral for, and transact any and all other business
with the Company and, subject to other applicable law, has the same rights and
obligations with respect to any such matter as a person who is not a Member or
Representative or Alternate.

     Section 4.10  ACTION OF THRASHER MEMBERS.  Each of the Thrasher Members has
appointed Thrasher to act on its behalf with respect to all matters requiring or
permitting the action by or consent or approval of the Thrasher Members.  The
Company, Bidder, and Bidder Member may rely solely on direction from Thrasher
with respect to all such matters and Thrasher shall act in the same manner with
respect to all of the Thrasher Members.  Notice in accordance with the terms of
this Agreement to Thrasher of any matter with respect to the Company shall be
considered notice to each Thrasher Member.

                                   ARTICLE V

                                INDEMNIFICATION

     Section 5.1  INDEMNIFICATION BY THE COMPANY.

          (a) The Company shall indemnify an indemnified representative against
any liability incurred in connection with any proceeding in which the
indemnified representative may be involved as a party or otherwise, as and when
incurred, by reason of the fact that such person is or was serving in an
indemnified capacity, including, without limitation, liabilities resulting from
any actual or alleged breach or neglect of duty, error, misstatement or
misleading statement, negligence, gross negligence or act giving rise to
liability, except:

               (1) where such indemnification is expressly prohibited by
     applicable law;

               (2) where the conduct of the indemnified representative has been
     finally determined:

                                       21
<PAGE>

                    (i) to constitute willful misconduct or recklessness
               sufficient in the circumstances to bar indemnification against
               liabilities arising from the conduct; or

                    (ii) to be based upon or attributable to the receipt by the
               indemnified representative from the Company of a personal benefit
               to which the indemnified representative is not legally entitled;
               or

               (3) to the extent such indemnification has been finally
     determined in a final adjudication to be otherwise unlawful.

          (b) If an indemnified representative is entitled to indemnification in
respect of a portion, but not all, of any liabilities to which such person may
be subject, the Company shall indemnify such indemnified representative to the
maximum extent for such portion of the liabilities.

          (c) The termination of a proceeding by judgment, order, settlement or
conviction or upon a plea of nolo contendere or its equivalent shall not of
itself create a presumption that the indemnified representative is not entitled
to indemnification.

          (d) Definitions.  For purposes of this Article:

               (1) "indemnified capacity" means any and all past, present and
     future service by an indemnified representative in one or more capacities
     as a Member, Manager, Representative, Alternate or authorized agent of the
     Company;

               (2) "indemnified representative" means any and all Members,
     Managers, Representatives, Alternates and authorized agents of the Company
     and any other person designated as an indemnified representative by the
     mutual consent of the Thrasher Members and Bidder Member, given in
     accordance with the provisions of this Operating Agreement;

               (3) "liability" means any damage, judgment, amount paid in
     settlement, fine, penalty, punitive damages, excise tax assessed with
     respect to an employee benefit plan, or cost or expense of any nature
     (including, without limitation, attorneys' fees and disbursements); and

               (4) "proceeding" means any threatened, pending or completed
     action, suit, appeal or other proceeding of any nature, whether civil,
     criminal, administrative or investigative, whether formal or informal, and
     whether brought by or in the right of the Company, a class of its Members
     or security holders or otherwise.

     Section 5.2  PROCEEDINGS INITIATED BY INDEMNIFIED REPRESENTATIVES.
Notwithstanding any other provision of this Article, the Company shall not
indemnify under this Article an indemnified representative for any liability
incurred in a proceeding

                                       22
<PAGE>

initiated (which shall not be deemed to include counterclaims or affirmative
defenses) or participated in as an intervenor or amicus curiae by the person
seeking indemnification unless such initiation of or participation in the
proceeding is authorized, either before or after its commencement, by the
unanimous consent of the Board of Representatives. This Section does not apply
to reimbursement of expenses incurred in successfully prosecuting or defending
the rights of an indemnified representative granted by or pursuant to this
Article.

     Section 5.3  ADVANCING EXPENSES.  The Company shall pay the expenses
(including attorneys' fees and disbursements) incurred in good faith by an
indemnified representative in advance of the final disposition of a proceeding
described in Section 5.1 or the initiation of or participation in which is
authorized pursuant to Section 5.2 upon receipt of an undertaking by or on
behalf of the indemnified representative to repay the amount if it is ultimately
determined that such person is not entitled to be indemnified by the Company
pursuant to this Article.  The financial ability of an indemnified
representative to repay an advance shall not be a prerequisite to the making of
such advance.

     Section 5.4  PAYMENT OF INDEMNIFICATION.  An indemnified representative
shall be entitled to indemnification within thirty (30) days after a written
request for indemnification has been delivered to the secretary of the Company.

     Section 5.5  ARBITRATION.

          (a) Any dispute related to the right to indemnification, contribution
or advancement of expenses as provided under this Article, except with respect
to indemnification for Liabilities arising under the Securities Act of 1933, as
amended, that the Company has undertaken to submit to a court for adjudication,
shall be decided only by arbitration in the metropolitan area in which the
principal executive offices of the Company are located at the time, in
accordance with the commercial arbitration rules then in effect of the American
Arbitration Association, before a panel of three arbitrators, one of whom shall
be selected by the Company, the second of whom shall be selected by the
Indemnified Representative and the third of whom shall be selected by the other
two arbitrators. In the absence of the American Arbitration Association, or if
for any reason arbitration under the arbitration rules of the American
Arbitration Association cannot be initiated, and if one of the parties fails or
refuses to select an arbitrator or the arbitrators selected by the Company and
the Indemnified Representative cannot agree on the selection of the third
arbitrator within thirty (30) days after such time as the Company and the
Indemnified Representative have each been notified of the selection of the
other's arbitrator, the necessary arbitrator or arbitrators shall be selected by
the presiding judge of the court of general jurisdiction in such metropolitan
area.

          (b) Each arbitrator selected as provided in this Section is required
to be or have been a Manager, director or executive officer of a limited
liability company, corporation or other entity whose equity securities were
listed during at least one (1) year

                                       23
<PAGE>

of such service on the New York Stock Exchange or the American Stock Exchange or
quoted on the National Association of Securities Dealers Automated Quotations
System.

          (c) The party or parties challenging the right of an Indemnified
Representative to the benefits of this Article shall have the burden of proof.

          (d) The Company shall reimburse an Indemnified Representative for the
expenses (including attorneys' fees and disbursements) incurred in successfully
prosecuting or defending such arbitration.

          (e) Any award entered by the arbitrators shall be final, binding and
nonappealable and judgment may be entered thereon by any party in accordance
with applicable law in any court of competent jurisdiction, except that the
Company shall be entitled to interpose as a defense in any such judicial
enforcement proceeding any prior final judicial determination adverse to the
indemnified representative under Section 5.1 in a proceeding not directly
involving indemnification under this Article. This arbitration provision shall
be specifically enforceable.

     Section 5.6  CONTRIBUTION.  If the indemnification provided for in this
Article or otherwise is unavailable for any reason in respect of any liability
or portion thereof, the Company shall contribute to the liabilities to which the
indemnified representative may be subject in such proportion as is appropriate
to reflect the intent of this Article or otherwise.

     Section 5.7  MANDATORY INDEMNIFICATION OF MEMBERS AND MANAGERS.  To the
extent that an indemnified representative of the Company has been successful on
the merits or otherwise in defense of any proceeding or in defense of any claim,
issue or matter therein, such person shall be indemnified against expenses
(including attorneys' fees and disbursements) actually and reasonably incurred
by such person in connection therewith.

     Section 5.8  CONTRACT RIGHTS; AMENDMENT OR REPEAL.  All rights under this
Article shall be deemed a contract between the Company and the indemnified
representative pursuant to which the Company and each indemnified representative
intend to be legally bound.  Any repeal, amendment or modification hereof shall
be prospective only and shall not affect any rights or obligations then
existing.

     Section 5.9  SCOPE OF ARTICLE.  The rights granted by this Article shall
not be deemed exclusive of any other rights to which those seeking
indemnification, contribution or advancement of expenses may be entitled under
any statute, agreement, vote of disinterested Members or disinterested
Representatives, Alternates, Managers or otherwise, both as to action in an
indemnified capacity and as to action in any other capacity. The
indemnification, contribution and advancement of expenses provided by or granted
pursuant to this Article shall continue as to a person who has ceased to be an
indemnified representative in respect of matters arising prior to such time, and
shall inure

                                       24
<PAGE>

to the benefit of the heirs, executors, administrators, personal
representatives, successors and permitted assigns of such a person.

     Section 5.10  RELIANCE ON PROVISIONS.  Each person who shall act as an
indemnified representative of the Company shall be deemed to be doing so in
reliance upon the rights of indemnification, contribution and advancement of
expenses provided by this Article.

                                   ARTICLE VI

                                CAPITAL ACCOUNTS

     Section 6.1   DEFINITIONS.  For the purposes of this Operating Agreement,
unless the context otherwise requires:

          "Additional Capital Contribution" means the Capital Contributions
described in Section 6.3 and made following the Initial Capital Contribution.

          "Adjusted Capital Account" shall mean, for any Member, its Capital
Account balance maintained and adjusted as required by Treasury Regulation
Section 1.704-1(b)(2)(iv).

          "Capital Account" shall mean, with respect to a Member, such Member's
capital account established and maintained in accordance with the provisions of
Section 6.5.

          "Capital Contribution" means any contribution to the capital of the
Company in cash, property or expertise by a Member whenever made. A loan by a
Member of the Company shall not be considered a Capital Contribution.

          "Initial Capital Contribution" means the Capital Contributions made by
the parties on the date of this Agreement.

          "IRC" shall mean the Internal Revenue Code of 1986, as amended.

          "Membership Interest" means a Member's interest in the Company.

          "Percentage Interest" means, with respect to any Member, the
Percentage Interest set forth opposite such Member's name on Schedule A attached
hereto, as amended from time to time to reflect transfers of Membership
Interests in accordance with this Operating Agreement.

          "Profits" and "Losses" mean, for each Fiscal Year, an amount equal to
the Company's taxable income or loss for such Fiscal Year, deter-mined in
accordance with IRC (S)703(a).  For the purpose of this definition, all items of
income, gain, loss or

                                       25
<PAGE>

deduction required to be stated separately pursuant to IRC (S)703(a)(1) shall be
included in taxable income or loss with the following adjustments:

               (1) Any income of the Company that is exempt from federal income
     tax and not otherwise taken into account in computing Profits or Losses
     pursuant to this Section shall be added to such taxable income or loss;

               (2) Any expenditures of the Company described in IRC
     (S)705(a)(2)(B) or treated as IRC (S)705(a)(2)(B) expenditures pursuant to
     Treasury Regulation (S)1.704-1(b)(2)(iv)(i), and not otherwise taken into
     account in computing Profits or Losses pursuant to this Section shall be
     subtracted from such taxable income or loss.

          "Treasury Regulations" include proposed, temporary and final
regulations promulgated under the IRC in effect as of the date of this Operating
Agreement and the corresponding sections of any regulations subsequently issued
that amend or supersede such regulations.

     Section 6.2  DETERMINATION OF TAX BOOK VALUE OF COMPANY ASSETS.

          (a) Except as set forth below, the "Tax Book Value" of any Company
asset is its adjusted basis for federal income tax purposes.

          (b) The initial Tax Book Value of any assets contributed by a Member
to the Company shall be the agreed fair market value of such assets, increased
by the amount of liabilities of the contributing Member assumed by the Company
in connection with the contribution of such assets plus the amount of any other
liabilities to which such assets are subject.  The Tax Book Values of the
Initial Capital Contributions are set forth on Schedule A hereto.

          (c) The Tax Book Values of all Company assets may be adjusted by the
Managers to equal their respective gross fair market values as of the following
times: (i) the admission of an additional Member to the Company or the
acquisition by an existing Member of an additional Membership Interest; (ii) the
distribution by the Company of money or property to a withdrawing, retiring or
continuing Member in consideration for the retirement of all or a portion of
such Member's Membership Interest; and (iii) the termination of the Company for
federal income tax purposes pursuant to Section 708(b)(1)(B) of the IRC.
Notwithstanding the foregoing, the Tax Book Values of Company assets will not be
adjusted at the time of the contribution of any portion of the Additional
Capital Contributions or any Permitted HoldCo Capital Contribution as outlined
in the Formation Agreements.

     Section 6.3  CAPITAL CONTRIBUTIONS.

Prior to the Initial Closing, the Initial Transferring Entities and Bidder
Member shall cause HoldCo, HoldCo Sub and OpCo to be formed.  Thereafter, at the
time of each

                                       26
<PAGE>

Closing, the Transferring Entities will contribute Thrasher Contributed Assets
and Thrasher Assumed Liabilities, and Bidder Member will contribute the Bidder
Contributed Cash and any Bidder Contributed Shares directly to HoldCo in
exchange for Membership Interests; thereafter, HoldCo will cause such Thrasher
Contributed Assets and such Thrasher Assumed Liabilities as well as the portion
of the Bidder Contributed Cash attributable to the Working Capital Contribution
as provided in the Formation Agreement to be contributed to HoldCo Sub;
thereafter, HoldCo Sub will cause all such assets and liabilities to be
contributed to OpCo. In connection with the foregoing, for convenience, at any
Closing the Transferring Entities may convey the Thrasher Contributed Assets and
Thrasher Assumed Liabilities directly to OpCo. In accordance with this:

          (a) The Initial Capital Contribution of each Member is set forth on
Schedule A and is made as of the date hereof.

          (b) Additional Capital Contributions shall be made as of the dates of
any subsequent Closings, and the Percentage Interests of the Members shall be
adjusted as provided in such Formation Agreement and on an amended and restated
Schedule A.  The Members acknowledge and agree that for purposes of computing
the Tax Book Values of the property contributed as Additional Capital
Contributions and the Percentage Interests of the Members, the provisions of the
Formation Agreement shall apply.

          (c) No Member shall be obligated to make any other Capital
Contributions to the Company in excess of its Initial Capital Contribution and
Additional Capital Contributions.  Notwithstanding the foregoing, Bidder Member
may make a Permitted HoldCo Capital Contribution, and the Percentage Interests
of the Members shall be adjusted from the date of such contribution by assuming
such a Permitted HoldCo Capital Contribution was a Working Capital Contribution
and the Percentage Interests were determined in the manner set forth in the
Formation Agreement.

          (d) No Member shall be permitted to make any capital contributions
other than those outlined in paragraphs (a) through (c) to the Company unless
mutually agreed by the Thrasher Members and Bidder Member.

     Section 6.4  LIABILITY FOR CONTRIBUTION.

          (a) A Member of the Company is obligated to the Company to perform any
promise to contribute cash or property or to perform services, even if the
Member is unable to perform because of death, disability or any other reason. If
a Member does not make the required contribution of property or services, the
Member is obligated at the option of the Company to contribute cash equal to
that portion of the agreed value (as stated in the records of the Company) of
the contribution that has not been made. The foregoing option shall be in
addition to, and not in lieu of, any other rights, including the right to
specific performance, that the Company may have against such Member under
applicable law.

                                       27
<PAGE>

          (b) The obligation of a Member of the Company to make a contribution
or return money or other property paid or distributed in violation of the Act
may be compromised only by consent of all the Members. Notwithstanding the
compromise, a creditor of the Company who extends credit, after entering into
this Operating Agreement or an amendment hereof which, in either case, reflects
the obligation, and before the amendment hereof to reflect the compromise, may
enforce the original obligation to the extent that, in extending credit, the
creditor reasonably relied on the obligation of a Member to make a contribution
or return. A conditional obligation of a Member to make a contribution or return
money or other property to the Company may not be enforced unless the conditions
of the obligation have been satisfied or waived as to or by such Member.
Conditional obligations include contributions payable upon a discretionary call
of the Company prior to the time the call occurs.

     Section 6.5  CAPITAL ACCOUNTS.  A separate Capital Account will be
maintained for each Member. The initial Capital Accounts shall consist solely of
the Initial Capital Contribution of the Members pursuant to Section 6.3.
Notwithstanding any other provision hereof, the Company shall determine and
adjust the Capital Accounts in accordance with the rules of Treasury Regulation
Section 1.704-1(b)(2)(iv).  Except as otherwise required in the Act, no Member
shall have any liability to restore all or any portion of a deficit balance in
the Member's Capital Account.

     Section 6.6  NO INTEREST ON OR RETURN OF CAPITAL.  No Member shall be
entitled to interest on any Capital Contribution or Capital Account. No Member
shall have the right to demand or receive the return of all or any part of any
Capital Contribution or Capital Account except as may be expressly provided
herein, and no Member shall be personally liable for the return of the Capital
Contributions of any other Member.

     Section 6.7  PERCENTAGE INTEREST.  The Percentage Interests of the Members
are as set forth on Schedule A.  The Percentage Interests shall be updated by
the Managers to reflect any transfers of Membership Interests and the making of
Additional Capital Contributions and any Permitted HoldCo Contributions, set
forth on a revised Schedule A and filed with the records of the Company. The sum
of the Percentage Interests for all Members shall equal 100 percent.

     Section 6.8  ALLOCATIONS OF PROFITS AND LOSSES GENERALLY.  After the
allocations in. Section 6.9, at the end of each year (or shorter period if
necessary or longer period if agreed by all of the Partners), Profits and Losses
shall be allocated as follows:

          (a) Profits.  Profits shall be allocated to the Members in proportion
to their respective Percentage Interests.

          (b) Losses.  Losses shall be allocated to the Members in proportion to
their respective Percentage Interests.

                                       28
<PAGE>

     Section 6.9  ALLOCATIONS UNDER REGULATIONS.

          (a) Company Nonrecourse Deductions.  Loss attributable (under Treasury
Regulation Section 1.704-2(c)) to "partnership nonrecourse liabilities" (within
the meaning of Treasury Regulation Section 1.704-2(b)(1)) shall be allocated
among the Members in the same proportion as their respective Percentage
Interests.

          (b) Member Nonrecourse Deductions.  Loss attributable (under Treasury
Regulation Section 1.704-2(i)(2)) to "partner nonrecourse debt" (within the
meaning of Treasury Regulation Section 1.704-2(b)(4)) shall be allocated, in
accordance with Treasury Regulation Section 1.704- 2(i)(1), to the Member who
bears the economic risk of loss with respect to the debt to which the Loss is
attributable. The Members acknowledge that the Incurred Debt, if any, shall be
treated as "partner nonrecourse debt."

          (c) Minimum Gain Chargeback.  Each Member will be allocated Profits at
such times and in such amounts as necessary to satisfy the minimum gain
chargeback requirements of Treasury Regulation Sections 1.704-2(f) and
1.704-2(i)(4).

          (d) Qualified Income Offset.  Losses and items of income and gain
shall be specially allocated when and to the extent required to satisfy the
"qualified income offset" requirement within the meaning of Treasury Regulation
Section 1.704-1(b)(2)(ii)(d).

     Section 6.10  OTHER ALLOCATIONS.

          (a) Allocations when Tax Book Value Differs from Tax Basis.  When the
Tax Book Value of a Company asset is different from its adjusted tax basis for
income tax purposes, then, solely for federal, state and local income tax
purposes and not for purposes of computing Capital Accounts, income, gain, loss,
deduction and credit with respect to such assets ("Section 704(c) Assets") shall
be allocated among the Members to take this difference into account in
accordance with the principles of IRC Section 704(c), as set forth herein and in
the Treasury Regulations thereunder and under IRC Section 704(b). Except to the
extent otherwise required by final Treasury Regulations, the calculation and
allocations eliminating the differences between Tax Book Value and adjusted tax
basis of the Section 704(c) Assets shall be made on an asset-by-asset basis
without curative or remedial allocations to overcome the "ceiling rule" of
Treasury Regulation Section 1.704-3(b)(1).

          (b)  Change in Member's Interest.

          (1) If during any fiscal year of the Company there is a change in any
Member's Membership Interest, then for purposes of complying with IRC Section
706(d), the determination of Company items allocable to any period shall be made
by using any method permissible under IRC Section 706(d) and the Regulations
thereunder as may be determined by the Managers.

                                       29
<PAGE>

          (2) The Members agree to be bound by the provisions of this Section
6.10(b) in reporting their shares of Company income, gain, loss, and deduction
for tax purposes.

          (c) Allocations on Liquidation.  Notwithstanding any other provision
of this Article VI to the contrary, in the taxable year in which there is a
liquidation of the Company, after the allocations in Sections 6.8 and 6.9
hereof, the Capital Accounts of the Members will, to the extent possible, be
brought to the amount of the liquidating distributions to be made to them under
Section 9.5 hereof by allocations of items of profit and loss and, if necessary,
by guaranteed payments (within the meaning of Code Section 707(c)) credited to
the Capital Account of a Member whose Capital Account is less than the amount to
be distributed to it and debited from the Capital Account of the Member whose
Capital Account is greater than the amount to be distributed to it.

     Section 6.11  LIMITATIONS UPON LIABILITY OF MEMBERS.  Except as otherwise
expressly and specifically provided in or required by the Certificate or this
Operating Agreement, the personal liability of each Member to the Company, to
the other Members, to the creditors of the Company or any third party for the
losses, debts or liabilities of the Company shall be limited to the amount of
its Capital Contribution which has not theretofore been returned to it as a
distribution (including a distribution upon liquidation). For purposes of the
foregoing sentence, distributions to a Member shall first be deemed a return of
its Capital Contribution. No Member shall at any time be liable or held
accountable to the Company, to the other Members, to the creditors of the
Company or to any other third party for or on account of any negative balance in
its Capital Account.

                                  ARTICLE VII

                                 DISTRIBUTIONS

     Section 7.1  NET CASH FROM OPERATIONS AND DISTRIBUTIONS.

          (a) Except as otherwise provided in this Operating Agreement
including, without limitation, in Section 3.8 hereof, Net Cash From Operations,
if any, shall be determined annually within ninety (90) days after the end of
each fiscal year jointly by the Members and distributed for each fiscal year to
the Members in accordance with their Percentage Interests.

          (b) For purposes of this Operating Agreement, "Net Cash From
Operations" means the gross cash proceeds from Company operations less the
portion thereof used to, or expected to be used to, pay expenses, debt payments,
capital improvements, replacements and increases to reserves therefor. "Net Cash
From Operations" shall not be reduced by depreciation, amortization, cost
recovery deductions or similar allowances, but shall be increased by any
reductions to reserves previously established.

                                       30
<PAGE>

     Section 7.2  LIMITATIONS ON DISTRIBUTIONS.

          (a) The Company shall not make a distribution to a Member to the
extent that at the time of the distribution, after giving effect to the
distribution, all liabilities of the Company, other than liabilities to Members
on account of their interests in the Company and liabilities for which the
recourse of creditors is limited to specified property of the Company, exceed
the fair value of the assets of the Company, except that the fair value of
property that is subject to a liability for which the recourse of creditors is
limited shall be included in the assets of the Company only to the extent that
the fair value of that property exceeds that liability.

          (b) A Member who receives a distribution in violation of subsection
(a), and who knew at the time of the distribution that the distribution violated
this section, shall be liable to the Company for the amount of the distribution.
A Member who receives a distribution in violation of this section, and who did
not know at the time of the distribution that the distribution violated this
section, shall not be liable for the amount of the distribution. Subject to
subsection (c), this subsection shall not affect any obligation or liability of
a Member under other applicable law for the amount of a distribution.

          (c) A Member who receives a distribution from the Company shall have
no liability under this Section, the Act or other applicable law for the amount
of the distribution after the expiration of three (3) years from the date of the
distribution unless an action to recover the distribution from such Member is
commenced prior to the expiration of the said three (3) year period and an
adjudication of liability against such Member is made in the action.

     Section 7.3  AMOUNTS OF TAX PAID OR WITHHELD.  All amounts paid or withheld
pursuant to the IRC or any provision of any state or local tax law with respect
to any Member shall be treated as amounts distributed to the Member pursuant to
this Article for all purposes under this Operating Agreement.

     Section 7.4  DISTRIBUTION IN KIND.  The Company shall not distribute any
assets in kind, except pursuant to a dissolution in accordance with Article IX.

     Section 7.5  CONTRIBUTED CASH DISTRIBUTION.  In connection with making the
Initial Capital Contributions and each Additional Capital Contribution, the
Company shall distribute the Contributed Cash Distribution and the Financing
Distribution, if any, as specified in the Formation Agreement to the Thrasher
Members participating in such capital contribution (or their successors in
interest).

     Section 7.6  REDEMPTION OF MEMBERSHIP INTERESTS.  No transfer or
disposition of the Bidder Contributed Shares, if any, shall be made (including
pursuant to Article IX) prior to the first anniversary of the Final Closing
Date.   The Thrasher Members may at any time after the first anniversary of the
Final Closing Date cause any or all of the Bidder Contributed Shares to be
distributed to the Thrasher Members in redemption of a percentage of their
membership interests and thereafter the aggregate Membership

                                       31
<PAGE>

Interests of the Thrasher Members shall be equal to (a) the Thrasher Interest
Value divided by (b) Total Entity Value (computing each such amount taking into
account the value of Additional Contributed Towers under Section 2A.10 of the
Formation Agreement, if applicable, but excluding the value of any distributed
Bidder Contributed Shares). The aggregate Membership Interest as adjusted shall
be apportioned among the Thrasher Members in proportion to the redeemed
Membership Interest held by them.

                                  ARTICLE VIII

                                TRANSFERABILITY

     Section 8.1  RESTRICTION ON TRANSFERS BY BIDDER MEMBER.  Without the prior
written consent of Thrasher, Bidder Member shall not have the right, directly or
indirectly, to sell, assign, transfer, pledge, hypothecate, mortgage or dispose
of, by gift or otherwise, or in any way encumber, any of the Bidder HoldCo
Interest unless either (a) the transfer is made to an entity of which Bidder or
Bidder Member owns directly or indirectly all of the voting power of the
outstanding capital stock (provided that (x) such entity executes an instrument
reasonably satisfactory in form and substance to Thrasher pursuant to which it
agrees to be bound hereby and (y) Bidder (or its successor by merger) shall not
thereafter at any time cease to own directly or indirectly less than all of the
voting power of the outstanding capital stock of such entity), or (b) Bidder
Member has complied with the procedures described in this Article VIII and
(i) the transfer is made subject to the right of first refusal described in
Section 8.3 hereof, and (ii) to the extent Thrasher does not exercise its right
of first refusal described in Section 8.3 hereof, the transfer is made subject
to the right of participation in sales described in Section 8.5(a) hereof. For
purposes of the foregoing, Bidder Member shall not be deemed to have indirectly
transferred any of the Bidder HoldCo Interest if Bidder or any other parent
corporation of Bidder Member is a party to any merger or consolidation
transaction, whether or not such parent corporation is the surviving entity in
such merger. Any purported transfer of the Bidder HoldCo Interest in violation
of this Section 8.1 shall be void.

     Section 8.2  RESTRICTION ON TRANSFERS BY THRASHER MEMBERS  Without the
prior written consent of Bidder Member, no Thrasher Member shall have the right,
directly or indirectly, to sell, assign, transfer, pledge, hypothecate, mortgage
or dispose of, by gift or otherwise, or in any way encumber, any of the Thrasher
HoldCo Interest unless either (i) the transfer is made to another Thrasher
Member or to any entity of which either Thrasher Parent, Thrasher, or Bell
Atlantic (after the Bell Atlantic Thrasher Merger is consummated) is the owner
directly or indirectly of a majority of the voting power of the outstanding
ownership interests of such entity (provided that (x) such entity executes an
instrument reasonably satisfactory in form and substance to Bidder Member
pursuant to which it agrees to be bound hereby and (y) Thrasher Parent or
Thrasher (or the successor by merger to either) shall not thereafter at any time
cease to own directly or indirectly less than  a majority of the voting power of
the outstanding ownership interests of such entity), or (ii) the Thrasher Member
has complied with the procedures described in this Article VIII and (A) the
transfer is made subject to the right of first refusal

                                       32
<PAGE>

described in Section 8.4 hereof or (B) to the extent Bidder Member does not
exercise its right of first refusal described in Section 8.4 hereof, the
transfer is made subject to the right of participation in sales described in
Section 8.5(b) hereof. For purposes of the foregoing, no Thrasher Member shall
be deemed to have indirectly transferred any of the Thrasher HoldCo Interest if
Thrasher Parent or any other parent corporation of such Thrasher Member is a
party to any merger or consolidation transaction, whether or not such parent
corporation is the surviving entity in such merger. Any purported transfer of
any Thrasher HoldCo Interest in violation of this Section 8.2 shall be void.

     Section 8.3  THRASHER RIGHT OF FIRST REFUSAL OF TRANSFER.

          (a) Subject to the provisions of Section 8.1, if at any time Bidder
Member wishes to sell all or any part of the Bidder HoldCo Interest, Bidder
Member shall submit a written offer to sell such Bidder HoldCo Interest to
Thrasher (on behalf of the Thrasher Members) on terms and conditions, including
price, not less favorable to Thrasher than those on which Bidder Member proposes
to sell the Bidder HoldCo Interest to any other purchaser (the "Bidder Offer").
The Bidder Offer shall disclose the identity of the proposed purchaser or
transferee, the percentage of the Bidder HoldCo Interest to be sold, the terms
of the sale, any amounts owed to Bidder Member with respect to the Bidder HoldCo
Interest and any other material facts relating to the sale.  Thrasher shall
respond to the Bidder Offer as soon as practicable after receipt thereof, and in
all events within thirty (30) days after receipt thereof. The Bidder Offer may
be revoked at any time. Thrasher shall have the right to accept the Bidder Offer
as to all (but not less than all) of the Bidder HoldCo Interest offered thereby.
In the event that Thrasher shall elect on a timely basis to purchase all (but
not less than all) of the Bidder HoldCo Interest covered by the Bidder Offer,
Thrasher shall communicate in writing such election to purchase to Bidder
Member, which communication shall be delivered by hand or mailed to Bidder
Member at the address set forth in Schedule A hereto and shall, when taken in
conjunction with the Bidder Offer, be deemed to constitute a valid, legally
binding and enforceable agreement for the sale and purchase of the Bidder HoldCo
Interest covered thereby; provided, however, that Bidder Member may elect in its
sole discretion to terminate such agreement at any time prior to the closing of
such sale and purchase, in which case such Bidder HoldCo Interest shall again
become subject to the requirements of a prior offer pursuant to this Section. In
the event Bidder Member terminates any such agreement prior to closing, Bidder
Member shall be prohibited from consummating a transaction for the sale and
purchase of the Bidder HoldCo Interest with the proposed purchaser or transferee
for two (2) years from the date of such termination, and shall be prohibited
from consummating a transaction for the sale and purchase of the Bidder HoldCo
Interest with any other party for six (6) months from the date of such
termination. In the event that any Bidder Offer includes any non-cash
consideration, Thrasher may in its sole discretion elect to pay a cash amount
equal to the fair market value of such non-cash consideration in lieu of such
non-cash consideration. The closing of the sale and purchase contemplated by any
agreement for the sale and purchase of any portion of the Bidder HoldCo Interest
entered into between a Thrasher Member and Bidder Member pursuant to this
Section 8.3 shall be consummated within sixty (60) days after the date that such
agreement becomes valid, legally binding and enforceable as

                                       33
<PAGE>

aforesaid, subject to extension to the extent necessary to secure required
approvals or consents from Governmental Authorities. Each of Thrasher and Bidder
Member hereby agrees to use its reasonable best efforts to obtain such required
approvals or consents from Governmental Authorities.

          (b) In the event that Thrasher does not purchase the Bidder HoldCo
Interest offered by Bidder Member pursuant to the Bidder Offer, such Bidder
HoldCo Interest not so purchased may be sold by Bidder Member at any time within
ninety (90) days after the expiration of the Bidder Offer, subject to the
provisions of Section 8.5 below. Any such sale shall be to the same proposed
purchaser or transferee, at not less than the price and upon other terms and
conditions, if any, not more favorable to the purchaser than those specified in
the Bidder Offer. If such Bidder HoldCo Interest is not sold within such ninety
(90)-day period, it shall again become subject to the requirements of a prior
offer pursuant to this Section 8.3. In the event that such Bidder HoldCo
Interest is sold pursuant to this Section 8.3 to any purchaser other than
Thrasher, such Bidder HoldCo Interest shall continue to be subject to the
restrictions imposed by this Operating Agreement and Section 8.3 of the
Formation Agreement with the same effect as though such purchaser were Bidder
Member for purposes of this Section.

     Section 8.4  BIDDER MEMBER'S RIGHT OF FIRST REFUSAL OF TRANSFER.

          (a) Subject to the provisions of Section 8.2, if at any time any
Thrasher Member wishes to sell all or any part of its Thrasher HoldCo Interest,
such Thrasher Member shall submit a written offer to sell such Thrasher HoldCo
Interest to Bidder Member on terms and conditions, including price, not less
favorable to Bidder Member than those on which such Thrasher Member proposes to
sell the Thrasher HoldCo Interest to any other purchaser (the "Thrasher Offer").
The Thrasher Offer shall disclose the identity of the proposed purchaser or
transferee, the percentage of the Thrasher HoldCo Interest to be sold, the terms
of the sale, any amounts owed to the Thrasher Member with respect to the
Thrasher HoldCo Interest and any other material facts relating to the sale.
Bidder Member shall respond to the Thrasher Offer as soon as practicable after
receipt thereof, and in all events within thirty (30) days after receipt
thereof.  The Thrasher Offer may be revoked at any time.  Bidder Member shall
have the right to accept the Thrasher Offer as to all (but not less than all) of
the Thrasher HoldCo Interest offered thereby. In the event that Bidder Member
elects on a timely basis to purchase all (but not less than all) of the Thrasher
HoldCo Interest covered by the Thrasher Offer, Bidder Member shall communicate
in writing such election to purchase to the Thrasher Member, which communication
shall be delivered by hand or mailed to the Thrasher Member at the address set
forth in Schedule A hereto and shall, when taken in conjunction with the
Thrasher Offer, be deemed to constitute a valid, legally binding and enforceable
agreement for the sale and purchase of the Thrasher HoldCo Interest covered
thereby; provided, however, that the Thrasher Member may elect in its sole
discretion to terminate such agreement at any time prior to the closing of such
sale and purchase, in which case such Thrasher HoldCo Interest shall again
become subject to the requirements of a prior offer pursuant to this Section.
In the event the Thrasher Member terminates any such agreement prior to closing,
the Thrasher Member shall be prohibited

                                       34
<PAGE>

from consummating a transaction for the sale and purchase of the Thrasher HoldCo
Interest with the proposed purchaser or transferee for two (2) years from the
date of such termination, and shall be prohibited from consummating a
transaction for the sale and purchase of the Thrasher HoldCo Interest with any
other party for six (6) months from the date of such termination. In the event
that any Thrasher Offer includes any non-cash consideration, Bidder Member may
in its sole discretion elect to pay a cash amount equal to the fair market value
of such non-cash consideration in lieu of such non-cash consideration. The
closing of the sale and purchase contemplated by any agreement for the sale and
purchase of any portion of the Thrasher HoldCo Interest or Thrasher Retained
Interest entered into between the Thrasher Member and Bidder Member pursuant to
this Section 8.4 shall be consummated within sixty (60) days after the date that
such agreement becomes valid, legally binding and enforceable as aforesaid,
subject to extension to the extent necessary to secure required approvals or
consents from Governmental Authorities. Each of Thrasher Member and Bidder
Member hereby agrees to use its reasonable best efforts to obtain such required
approvals or consents from Governmental Authorities.

          (b) In the event that Bidder Member does not purchase the Thrasher
HoldCo Interest offered by the Thrasher Member pursuant to the Thrasher Offer,
such Thrasher HoldCo Interest not so purchased may be sold by the Thrasher
Member at any time within ninety (90) days after the expiration of the Thrasher
Offer.  Any such sale shall be to the same proposed purchaser or transferee, at
not less than the price and upon other terms and conditions, if any, not more
favorable to the purchaser than those specified in the Thrasher Offer. If such
Thrasher HoldCo Interest is not sold within such ninety (90)-day period, such
Thrasher HoldCo Interest shall continue to be subject to the requirements of a
prior offer pursuant to this Section.  In the event that such Thrasher HoldCo
Interest is sold pursuant to this Section to any purchaser other than Bidder
Member, such portion of the Thrasher HoldCo Interest shall continue to be
subject to the restrictions imposed by this Operating Agreement and Section 8.4
of the Formation Agreement with the same effect as though such purchaser were
the Thrasher Member for purposes of such Section.

     Section 8.5  RIGHT OF PARTICIPATION IN SALES.

          (a) If at any time Bidder Member wishes to sell all or any portion of
the Bidder HoldCo Interest to any person or entity other than Thrasher (on
behalf of the Thrasher Members) (the "Bidder HoldCo Interest Purchaser"),
Thrasher shall have the right to offer for sale to the Bidder HoldCo Interest
Purchaser, as a condition of such sale by Bidder Member, at the same price and
on the same terms and conditions as involved in such sale by Bidder Member, the
same proportion of the aggregate Thrasher HoldCo Interest as the proposed sale
represents with respect to the Bidder HoldCo Interest.  Thrasher shall notify
Bidder Member of such intention as soon as practicable after receipt of the
Bidder Offer made pursuant to Section 8.3, and in all events within thirty (30)
days after receipt thereof in the event that Thrasher elects to participate in
such sale by Bidder Member, Thrasher shall communicate such election to Bidder
Member, which communication shall be delivered in accordance with Section 11.5.
Bidder Member and

                                       35
<PAGE>

those Thrasher Members selected by Thrasher shall sell to the Bidder HoldCo
Interest Purchaser the Bidder HoldCo Interest proposed to be sold by Bidder
Member and the Thrasher HoldCo Interest proposed to be sold by the Thrasher
Members at not less than the price and upon other terms and conditions, if any,
not more favorable to the Bidder HoldCo Interest Purchaser than those in the
Bidder Offer provided by Bidder Member under Section 8.3 above; provided,
however, that any purchase of less than all of the Bidder HoldCo Interest and
the Thrasher HoldCo Interest by the Bidder HoldCo Interest Purchaser shall be
made from Bidder Member and the Thrasher Members pro rata based upon the amount
offered to be sold by each. Any portion of the Bidder HoldCo Interest and the
Thrasher HoldCo Interest sold pursuant to this Section 8.5(a) shall no longer be
subject to the restrictions imposed by Sections 8.3 or 8.4 of this Operating
Agreement or entitled to the benefit of this Section 8.5(a).

          (b) If at any time any Thrasher Member wishes to sell all or any
portion of the Thrasher HoldCo Interest to any person or entity other than
Bidder Member or the Thrasher Parent (the "Thrasher HoldCo Interest Purchaser"),
Bidder Member shall have the right to offer for sale to the Thrasher HoldCo
Interest Purchaser, as a condition of such sale by the Thrasher Member, at the
same price and on the same terms and conditions as involved in such sale by the
Thrasher Member, the same proportion of the Bidder HoldCo Interest as the
proposed sale represents with respect to the Thrasher HoldCo Interest.  Bidder
Member shall notify Thrasher of such intention as soon as practicable after
receipt of the Thrasher Offer made pursuant to Section 8.4, and in all events
within thirty (30) days after receipt thereof .  In the event that Bidder Member
elects to participate in such sale by the Thrasher Member, Bidder Member shall
communicate such election to Thrasher, which communication shall be delivered in
accordance with Section 11.5, and, in shall event, Thrasher Members and Bidder
Member shall sell to the Thrasher HoldCo Interest Purchaser the Thrasher HoldCo
Interest proposed to be sold by the Thrasher Member and the Bidder HoldCo
Interest proposed to be sold by Bidder Member, at not less than the price and
upon other terms and conditions, if any, not more favorable to the Thrasher
HoldCo Interest Purchaser than those in the Thrasher Offer provided by Thrasher
under Section 8.4 above; provided, however, that any purchase of less than all
of the Thrasher HoldCo Interest proposed to be sold by the Thrasher Member and
the Bidder HoldCo Interest proposed to be sold by the Bidder Member by the
Thrasher HoldCo Interest Purchaser shall be made from the Thrasher Member and
Bidder Member pro rata based upon the amount offered to be sold by each.  Any
portion of the Thrasher HoldCo Interest and the Bidder HoldCo Interest sold
pursuant to this Section 8.5(b) shall no longer be subject to the restrictions
imposed by Sections 8.3 or 8.4 or entitled to the benefit of this Section
8.5(b).

     Section 8.6  EFFECT OF TRANSFER.

          (a) In addition to satisfaction of Section 4.1 and the above
provisions of this Article VIII, no assignee or transferee of all or part of a
Membership Interest in the Company shall have the right to become admitted as a
Member, unless and until:

                                       36
<PAGE>

               (1) the assignee or transferee has executed an instrument
          reasonably satisfactory to the Managers accepting and adopting the
          provisions of this Operating Agreement;

               (2) the assignee or transferee has paid all reasonable expenses
          of the Company requested to be paid by the Managers in connection with
          the admission of such assignee or transferee as a Member; and

               (3) such assignment or transfer shall be reflected in a revised
          Schedule A to this Operating Agreement.

          (b) A person who is a permitted assignee of an interest in the Company
transferred in compliance with the provisions of this Article VIII shall be
admitted to the Company as a Member and shall receive an interest in the Company
without making a contribution or being obligated to make a contribution to the
Company.

     Section 8.7  NO RESIGNATION OF MEMBERS.  A Member may not withdraw or
resign from the Company prior to dissolution or winding up of the Company. If a
Member is a corporation, trust or other entity and is dissolved or terminated,
the powers of that Member may be exercised by its legal representative or
successor.

                                   ARTICLE IX

                          DISSOLUTION AND TERMINATION

     Section 9.1  DISSOLUTION.  The Company shall be dissolved upon the
occurrence of any of the following events:

          (a) By the written consent of both the Thrasher Members and Bidder
Member;

          (b) Upon the entry of a decree of judicial dissolution under (S)18-802
of the Act;

          (c) Upon the unilateral election by the Thrasher Members, exercisable
within ninety days notice at any time after the third anniversary of the
Effective Date of this Agreement by Thrasher giving written notice thereof to
Bidder Member; or

          (d) Upon the unilateral election by Bidder Member, exercisable with
ninety days notice at any time after the fourth anniversary of the Effective
Date of this Agreement by Bidder Member giving written notice thereof to
Thrasher.

     Section 9.2  EVENTS OF BANKRUPTCY OF MEMBER.  The occurrence of any of the
events set forth in this Section 9.2, with respect to any Member, shall not
result in the dissolution of the Company. Such Member shall cease to be a Member
of the Company,

                                       37
<PAGE>

but shall, however, retain its interest in allocations and distributions, upon
the happening of any of the following bankruptcy events:

          (a) A Member takes any of the following action:

               (1) Makes an assignment for the benefit of creditors.

               (2) Files a voluntary petition in bankruptcy.

               (3) Is adjudged a bankrupt or insolvent, or has entered against
          the Member an order for relief, in any bankruptcy or insolvency
          proceeding.

               (4) Files a petition or answer seeking for the Member any
          reorganization, arrangement, composition, readjustment, liquidation,
          dissolution or similar relief under any statute, law or regulation.

               (5) Files an answer or other pleading admitting or failing to
          contest the material allegations of a petition filed against the
          Member in any proceeding of this nature.

               (6) Seeks, consents to or acquiesces in the appointment of a
          trustee, receiver or liquidator of the Member or of all or any
          substantial part of the properties of the Member.

          (b) one hundred twenty (120) days after the commencement of any
proceeding against the Member seeking reorganization, arrangement, composition,
readjustment, liquidation, dissolution or similar relief under any statute, law
or regulation, if the proceeding has not been dismissed, or if within ninety
(90) days after the appointment without the consent or acquiescence of the
Member, of a trustee, receiver or liquidator of the Member or of all or any
substantial part of the properties of the Member, the appointment is not vacated
or stayed, or within ninety (90) days after the expiration of any such stay, the
appointment is not vacated.

     Section 9.3  JUDICIAL DISSOLUTION.  On application by or for a Member or a
Manager, a court may decree dissolution of the Company whenever it is not
reasonably practicable to carry on the business in conformity with this
Operating Agreement.

     Section 9.4  WINDING UP.

          (a) The Managers shall wind up the affairs of the Company or may
appoint any person or entity, including a Member, who has not wrongfully
dissolved the Company, to do so (the "Liquidating Trustee").

          (b) Upon dissolution of the Company and until the filing of a
certificate of cancellation as provided in Section 9.6, the persons winding up
the affairs of

                                       38
<PAGE>

the Company may, in the name of, and for and on behalf of, the Company,
prosecute and defend suits, whether civil, criminal or administrative, gradually
settle and close the business of the Company, dispose of and convey the property
of the Company, discharge or make reasonable provision for the liabilities of
the Company, and distribute to the Members any remaining assets of the Company,
all without affecting the liability of Members and Managers and without imposing
liability on a Liquidating Trustee.

     Section 9.5  DISTRIBUTION OF ASSETS.

          (a) In the event of any dissolution of the Company, upon the winding
up of the Company, its assets shall be distributed as follows:

               (1) First, to creditors, including Members and Managers who are
          creditors, to the extent otherwise permitted by law, in satisfaction
          of liabilities of the Company (whether by payment or the making of
          reasonable provision for payment thereof) other than liabilities for
          which reasonable provision for payment has been made;

               (2) Next, (i) the Bidder Contributed Shares, if any, to the
          Thrasher Members and (ii) subject to the condition that Bidder Member
          makes the payment required under the following subsection (b), the one
          hundred (100%) percentage membership interest in HoldCo Sub held by
          the Company shall be distributed to Bidder Member; and

               (3) Then, to the Members in proportion to their Percentage
          Interests.

          (b) If the membership interest in HoldCo Sub is distributed to Bidder
Member, in consideration of the distribution to Bidder Member of the HoldCo Sub
membership interest, Bidder Member shall make a payment to the Thrasher Members
(divided among them in proportion to their respective Percentage Interest), in
an amount equal to the Fair Market Value of such membership interest in HoldCo
Sub, which reflects the underlying value of the assets held by each of HoldCo
Sub and OpCo, multiplied by the Adjusted Thrasher HoldCo Interest.  Such payment
shall be made in cash.  For purposes of this Section of the HoldCo Sub
membership interest shall be calculated as follows: (i) Thrasher and Bidder
Member shall negotiate in good faith to determine Fair Market Value and (ii) if
Thrasher and Bidder Member fail to agree on Fair Market Value within thirty (30)
days after such trigger event, the Fair Market Value of the HoldCo Sub
membership interest shall be determined pursuant to the appraisal process
described below:

               (1) Not later than five (5) days after the expiration of the
     period during which Thrasher and Bidder Member are to negotiate in good
     faith to determine the Fair Market Value, Thrasher and Bidder Member shall
     each select an appraiser (which may or may not be a Qualified Investment
     Banking Finn (as hereinafter defined)) and shall give the other party
     notice of such selection. Each of such appraisers (the "Original
     Appraisers") shall determine the

                                       39
<PAGE>

     fair market value of the HoldCo Sub membership interest at the time such
     appraiser renders its written appraisal.

               (2) Each Original Appraiser shall deliver its written appraisal
     to the party retaining such Original Appraiser within twenty (20) days
     following the date of the selection of both Original Appraisers. Such
     written appraisals shall be exchanged by Thrasher and Bidder Member at the
     offices of Alston & Bird LLP, or such other place as the parties shall
     designate, at 10:00 a.m. local time on the twenty-first (21st) day
     following the date of the selection of both Original Appraisers. In the
     event that the Original Appraisers agree on the fair market value, the Fair
     Market Value shall be such agreed-upon amount. In the event that the
     Original Appraisers do not agree on the fair market value, (i) if the
     higher of the two valuations is not more than one hundred ten percent
     (110%) of the lower valuation of the Original Appraisers, the Fair Market
     Value shall be the mean of the two valuations, and (ii) if the higher of
     the two valuations is greater than one hundred ten percent (110%) of the
     lower valuation, the Original Appraisers shall elect a Qualified Investment
     Banking Firm which shall independently calculate the fair market value
     within fifteen (15) days of such election. If the Original Appraisers
     cannot agree upon a third appraiser within five (5) days following the end
     of the twenty (20) day period referred to above, then the third appraiser
     shall be a Qualified Investment Banking Firm appointed by the American
     Arbitration Association ("AAA").  Neither Thrasher nor Bidder Member nor
     either of the Original Appraisers shall provide the third appraiser,
     directly or indirectly, with a copy of the written appraisal of either of
     the Original Appraisers, an oral or written summary thereof, or the
     valuation determined by either of the Original Appraisers, either orally or
     in writing. The valuation of the third appraiser will be compared with the
     two valuations of the Original Appraisers, and the valuation farthest from
     the third valuation will be disregarded. The Fair Market Value shall be the
     mean of the two remaining valuations.

               (3) Thrasher and Bidder Member shall give to the Original
     Appraisers and the third appraiser, and shall cause HoldCo Sub and OpCo to
     give to the appraisers, free and full access to and the right to inspect,
     during normal business hours, all of the premises, properties, assets,
     records, contracts and other documents relating to HoldCo Sub and OpCo and
     shall permit them and cause HoldCo Sub and OpCo to permit them to consult
     with the officers, employees, accountants, counsel and agents of HoldCo
     Sub, OpCo, Thrasher and Bidder Member for the purpose of making such
     investigation of HoldCo Sub and OpCo as they shall desire to make.
     Furthermore, Thrasher and Bidder Member shall furnish to the Original
     Appraisers and the third appraiser, and shall cause HoldCo Sub and OpCo to
     furnish to such appraisers all such documents and copies of documents and
     records and information with respect to the affairs of HoldCo Sub and OpCo
     and copies of any working papers relating thereto as they shall from time
     to time reasonably request.

                                       40
<PAGE>

               (4) "Qualified Investment Banking Firm" means any firm engaged in
     providing corporate finance, merger and acquisition, and business valuation
     services and deriving revenues therefrom (excluding any revenues derived
     from merchant banking activities) of at least $25 million during its last
     completed fiscal year, but excluding, however, any firms which received
     more than $250,000 in fees during the preceding twenty-four (24) calendar
     months from Thrasher or Bidder Member or their respective affiliates and
     any firms selected by Thrasher or Bidder Member as an Original Appraiser.

          (c) The Company following dissolution shall pay or make reasonable
provision to pay all claims and obligations, including all contingent,
conditional or unmatured claims and obligations, known to the Company and all
claims and obligations which are known to the Company but for which the identity
of the claimant is unknown. If there are sufficient assets, such claims and
obligations shall be paid in full and any such provision for payment made shall
be made in full.  If there are insufficient assets, such claims and obligations
shall be paid or provided for according to their priority and, among claims and
obligations of equal priority, ratably to the extent of assets available
therefor. Any remaining assets shall be distributed as provided in subsection
(a). Any Liquidating Trustee winding up the affairs of the Company who has
complied with this Section shall not be personally liable to the claimants of
the dissolved Company by reason of such person's actions in winding up the
Company.

     Section 9.6  CANCELLATION OF CERTIFICATE.  The Certificate of the Company
shall be canceled upon the dissolution and the completion of winding up of the
Company.

                                   ARTICLE X

                    BOOKS; REPORTS TO MEMBERS; TAX ELECTIONS

     Section 10.1  BOOKS AND RECORDS.

          (a) The Managers shall maintain separate books of account for the
Company which shall show a true and accurate record of all costs and expenses
incurred, all charges made, all credits made and received and all income derived
in connection with the conduct of the Company and the operation of its business,
and, to the extent inconsistent therewith, in accordance with this Operating
Agreement.

          (b) Except as and until otherwise required by the IRC, the books of
the Company shall be kept in accordance with the accrual method of accounting.

          (c) Each Member of the Company has the right to obtain from the
Company from time to time upon demand for any purpose reasonably related to the
Member's interest as a Member of the Company:

               (1) True and full information regarding the status of the
     business and financial condition of the Company.

                                       41
<PAGE>

               (2) Promptly after they become available, a copy of the federal,
     state and local income tax returns for each year of the Company.

               (3) A current list of the name and last known business, residence
     or mailing address of each Member and Manager.

               (4) A copy of this Operating Agreement, the Certificate and all
     amendments thereto.

               (5) Any information or report deemed necessary by either any
     Thrasher Affiliate or Bidder Member in order to prepare Securities and
     Exchange Commission filing documents, financial statements or tax returns.

               (6) Other information regarding the affairs of the Company as is
     just and reasonable.

          (d) Each Manager shall have the right to examine all of the
information described in subsection (c) of this Section for a purpose reasonably
related to its position as a Manager.

     Section 10.2  TAX INFORMATION.  Within ninety (90) days after the end of
each Fiscal Year, the Company shall supply to each Member all information
necessary and appropriate to be included in each Member's income tax returns for
that year.

     Section 10.3  BUSINESS PLANS.  On or before November 30 of each year, the
Managers of the Company shall, in consultation with Thrasher, develop a business
plan and budget for the Company (including HoldCo Sub and OpCo) (the "Business
Plan") for the following calendar year of HoldCo (and HoldCo Sub and OpCo) the
Business Plan for the period between the Initial Closing Date and December 31,
2000 shall be mutually agreed upon by Thrasher and Bidder prior to the Initial
Closing. The Business Plan for the period between the Effective Date and
December 31, 2000 is attached hereto as Schedule D. Each subsequent Business
Plan shall be submitted to the Members for review and, subject to the second
following sentence, comment and shall be adopted only with the mutual consent of
the Thrasher Members and Bidder Member. The Company shall use commercially
reasonable efforts to, and cause each of HoldCo Sub and OpCo to, conduct their
respective businesses in accordance with the then current Business Plan. If by
the first date of any year the proposed Business Plan for that year has not been
adopted, the Business Plan for such year shall be deemed to be the expense
portion of the Business Plan in effect for the preceding year increased, at the
discretion of Bidder Member, to an amount not to exceed the sum of.

          (a) the average operating cost per communications tower owned by OpCo
(or of which it has the economic benefit) (the "OpCo Towers") based on the most
recent quarterly financial statements available as of the first day of the
current year multiplied by fifty percent (50%) of the sum of (i) the aggregate
number of OpCo Towers

                                       42
<PAGE>

constructed, completed or otherwise acquired in the course of the prior year and
(ii) the aggregate number of OpCo Towers projected to be constructed, completed
or otherwise acquired in the current year in the Business Plan for the prior
year; and

          (b) the sum of (x) with respect to all contractual price increases
with respect to contracts and agreements to which OpCo is a party and all
increases in Taxes with respect to OpCo Towers, the amount of such increase and
(y) with respect to all other expense items in the previous year's budget,
(A) the amount of such expenses multiplied by (B) the sum of one (1) plus an
amount equal to the percentage increase in the CPI during the previous year.

If Thrasher and Bidder Member are unable to mutually agree on the Business Plan
for the year commencing January 1, 2001, the Business Plan for such year shall
be deemed to be the quotient of (a) the expense portion of the initial Business
Plan for the period ending December 31, 2000, increased as contemplated by the
foregoing sentence, multiplied by three hundred sixty-five (365) (b) divided by
the number of days elapsed between the Effective Date and December 31, 2000
(including both the Effective Date and December 31, 2000).

Notwithstanding the foregoing, each Business Plan that is implemented pursuant
to the foregoing two paragraphs of this Section 10.3 because Thrasher and Bidder
Member are unable to mutually agree on the Business Plan must provide for the
payment by OpCo, prior to the allocation of revenues pursuant to such two
paragraphs, of:  (i) any and all costs, expenses or payments reasonably
necessary to fulfill OpCo's obligations under the Global Lease; (ii) any and all
costs, expenses or payments reasonably necessary to fulfill OpCo's obligations
under the Build-to-Suit Agreement; (iii) any and all taxes of any kind due and
owing by OpCo; (iv) any payments or expenditures required under any lease of
real estate, grant of easement, right of way or similar agreement to which OpCo
is a party; (v) any and all costs, expenses or payments reasonably necessary to
fulfill OpCo's obligations under any lease or sublease of tower space or real
estate to any third party; (vi) insurance premiums (including without
limitation, any payments pursuant to premium financing) and/or deductibles of
OpCo; (vii) payments to third parties for equipment or any other goods and
services required to perform OpCo's obligations under existing agreements
including, without limitation, payments required to satisfy any mechanic's
liens; (viii) salaries, commissions, compensation, benefits, and payments or
obligations of a similar nature; and (ix) any and all costs, expenses and
payments required to comply with, or payable pursuant to any applicable laws,
rule, regulations, ordinances, permits or licenses. Further, any such Business
Plan may have the effect of reducing amounts payable under the Management
Agreement so long as the Incurred Debt, if any, remains outstanding.

     Section 10.4  REPORTS.  The Company shall cause to be prepared, and each
Member furnished with, financial statements accompanied by a report thereon of
the Company's accountants stating that such statements are prepared and fairly
stated in all material respects in accordance with generally accepted accounting
principles, and, to the

                                       43
<PAGE>

extent inconsistent therewith, in accordance with this Operating Agreement,
including the following:

          (a) within thirty (30) days of the end of each month, the Company
shall deliver to the Thrasher Members and Bidder Member an unaudited income
statement and schedule as to the sources and application of funds for such month
and an unaudited balance sheet of the Company as of the end of such month, in
reasonable detail and prepared in accordance with GAAP (except as permitted by
Form 10-Q under the Securities Exchange Act of 1934, as amended (the "Exchange
Act")), together with an analysis by management of the Company's financial
condition and results of operations during such period and explanation by
management of any differences between such condition or results and the budget
and business plan for such period;

          (b) as soon as practicable, but in any event within ninety (90) days
after the end of each fiscal year of the Company, a consolidated income
statement for such fiscal year, a consolidated balance sheet of the Company as
of the end of such year, a schedule as to the cash flow and a statement of the
Members' Capital Accounts, changes thereto for such fiscal year and Percentage
Interests at the end of such year, such year-end financial reports to be in
reasonable detail, prepared in accordance with GAAP and audited and certified by
the Company's independent public accountants;

          (c) as soon as practicable, but in any event within thirty (30) days
after the end of each of the first three (3) quarters of each fiscal year of the
Company, an unaudited consolidated profit or loss statement and schedule as to
consolidated cash flow for such fiscal quarter and an unaudited consolidated
balance sheet of the Company as of the end of such fiscal quarter, in reasonable
detail and prepared in accordance with GAAP (except as permitted by Form I O-Q
under the Exchange Act); and

          (d) such other information relating to the financial condition,
business, prospects or corporate affairs of the Company as any Member may from
time to time reasonably request.

     Section 10.5  TAX MATTERS PARTNER.

          (a) GTE Wireless of Houston Incorporated (a Thrasher Member who is
also an Initial Transferring Entity), is hereby appointed and shall serve as the
tax matters partner of the Company (the "Tax Matters Partner") within the
meaning of IRC (S)6231(a)(7) for so long as it is not the subject of a
bankruptcy event as defined in Section 9.2 and otherwise is entitled to act as
the Tax Matters Partner. The Tax Matters Partner may file a designation of
itself as such with the Internal Revenue Service. The Tax Matters Partner shall
(i) furnish to each Member affected by an audit of the Company income tax
returns a copy of each notice or other communication received from the IRS or
applicable state authority, (ii) keep such Member informed of any administrative
or judicial proceeding, as required by Section 6223(g) of the Code, and
(iii) allow such Member an opportunity to participate in all such administrative
and judicial proceedings. The Tax Matters Partner shall take such action as may
be reasonably necessary to
                                       44
<PAGE>

constitute the other Member a "notice partner" within the meaning of Section
6231(a)(8) of the Code, provided that the other Member provides the Tax Matters
Partner with the information that is necessary to take such action; and

          (b) The Company shall not be obligated to pay any fees or other
compensation to the Tax Matters Partner in its capacity as such. However, the
Company shall reimburse the expenses (including reasonable attorneys' and other
professional fees) incurred by the Tax Matters Partner in such capacity. Each
Member who elects to participate in Company administrative tax proceedings shall
be responsible for its own expenses incurred in connection with such
participation. In addition, the cost of any adjustments to a Member and the cost
of any resulting audits or adjustments of a Member's tax return shall be borne
solely by the affected Member; and

          (c) The Company shall indemnify and hold harmless the Tax Matters
Partner from and against any loss, liability, damage, cost or expense (including
reasonable attorneys' fees) sustained or incurred as a result of any act or
decision concerning Company tax matters and within the scope of such Member's
responsibilities as Tax Matters Partner, so long as such act or decision was not
the result of gross negligence, fraud, bad faith or willful misconduct by the
Tax Matters Partner. The Tax Matters Partner shall be entitled to rely on the
advice of legal counsel as to the nature and scope of its responsibilities and
authority as Tax Matters Partner, and any act or omission of the Tax Matters
Partner pursuant to such advice shall in no event subject the Tax Matters
Partner to liability to the Company or any Member.

     Section 10.6  TAX AUDITS/SPECIAL ASSESSMENTS.  If the Tax return of either
the Company or an individual Member with respect to an item or items of Company
income, loss, deduction, etc., potentially affecting the Tax liability of the
Members generally is subject to an audit by the Internal Revenue Service or
similar state or local authority, the Managers may, in the exercise of their
business judgment, determine that it is necessary to contest proposed
adjustments to such return or items. If such a determination is made, the
Managers will finance the contest of the proposed adjustments out of the Net
Cash From Operations.

     Section 10.7  TAX ELECTIONS.  The Company will elect to amortize
organizational costs.  Upon the death of a Member, or in the event of the
distribution of property, the Company may file an election, in accordance with
applicable Treasury Regulations, to cause the basis of the Company's property to
be adjusted for federal income tax purposes as provided by IRC (S)734,
IRC (S)743 and IRC (S)754. The determination whether to make and file any such
election shall be made by the Managers in their sole discretion.

                                       45
<PAGE>

                                   ARTICLE XI

                                 MISCELLANEOUS

     Section 11.1  BINDING EFFECT.  This Operating Agreement shall be binding
upon the Thrasher Members and Bidder Member and any permitted transferee or
permitted assignee of an interest in the Company.

     Section 11.2  ENTIRE AGREEMENT.  This Operating Agreement, the Certificate,
the Formation Agreement and the other Transaction Documents contain the entire
agreement of the parties hereto with respect to the subject matter hereof and
supersede all prior understandings and agreements of the parties with respect
thereto.

     Section 11.3  AMENDMENTS.  The Certificate and this Operating Agreement may
not be amended except by the written agreement of all of the Members.

     Section 11.4  CHOICE OF LAW.  Notwithstanding the place where this
Operating Agreement may be executed by any of the parties hereto, the parties
expressly agree that all the terms and provisions hereof shall be construed
under the laws of Delaware (without regard to any conflicts of law principles).

     Section 11.5  NOTICES.  Except as otherwise provided in this Operating
Agreement, any notice, demand or communication required or permitted to be given
by any provision, including the provisions of Section 4.10, of this Operating
Agreement shall be deemed to have been sufficiently given or served for all
purposes if delivered personally or sent by facsimile transmission or overnight
express to the party or to an executive officer of the party to whom the same is
directed or, if sent by registered or certified mail, postage and charges
prepaid, addressed to the Member's or Company's address, as appropriate, which
is set forth in this Operating Agreement or Schedule A hereto.

     Section 11.6  HEADINGS.  The titles of the Articles and the headings of the
Sections of this Operating Agreement are for convenience of reference only and
are not to be considered in construing the terms and provisions of this
Operating Agreement.

     Section 11.7  PRONOUNS.  All pronouns shall be deemed to refer to the
masculine, feminine, neuter, singular or plural, as the identity of the person
or persons, firm or corporation may require in the contest thereof.

     Section 11.8  WAIVERS.  The failure of any party to seek redress for
violation of or to insist upon the strict performance of any covenant or
condition of this Operating Agreement shall not prevent a subsequent act, that
would have originally constituted a violation, from having the effect of an
original violation.

     Section 11.9  SEVERABILITY.  If any provision of this Operating Agreement
or its application to any person or circumstance shall be invalid, illegal or
unenforceable to any

                                       46
<PAGE>

extent, the remainder of this Operating Agreement and its application shall not
be affected and shall be enforceable to the fullest extent permitted by law.

     Section 11.10  NO THIRD PARTY BENEFICIARIES.  None of the provisions of
this Operating Agreement shall be for the benefit of or enforceable by any
person other than the parties to this Agreement and their respective permitted
successors and permitted transferees and assigns.

     Section 11.11  INTERPRETATION.  It is the intention of the Members that,
during the term of this Operating Agreement, the rights of the Members and their
successors-in-interest shall be governed by the terms of this Agreement, and
that the right of any Member or successor-in-interest to assign, transfer, sell
or otherwise dispose of any interest in the Company shall be subject to
limitations and restrictions of this Operating Agreement.

     Section 11.12  FURTHER ASSURANCES.  Each Member shall execute all such
certificates and other documents and shall do all such other acts as the
Managers deem appropriate to comply with the requirements of law for the
formation of the Company and to comply with any laws, rules, regulations and
third-party-requests relating to the acquisition, operation or holding of the
property of the Company.

     Section 11.13  COUNTERPARTS.  This Operating Agreement may be executed in
counterparts, each of which shall be deemed an original, but all of which taken
together shall constitute one and the same instrument.

                                       47
<PAGE>

     IN WITNESS WHEREOF, the undersigned Members, intending to be legally bound,
have executed this Operating Agreement as of the date first above written.

                    GTE MOBILNET OF OHIO LIMITED PARTNERSHIP

                    By:  GTE Mobilnet of Cleveland Incorporated,
                         its general partner


                         By:______________________________

                         Name:____________________________

                         Title:___________________________


                         Attest:__________________________

                         Name:____________________________

                         Title:___________________________


                         [Corporate Seal]


                    FLORIDA RSA #1B (NAPLES) LIMITED PARTNERSHIP

                    By:  GTE Wireless of the South Incorporated,
                         its general partner


                         By:__________________________

                         Name:________________________

                         Title:_______________________


                         Attest:______________________

                         Name:________________________

                         Title:_______________________


                         [Corporate Seal]

                                       48
<PAGE>

                    OHIO RSA #3 LIMITED PARTNERSHIP

                    By:  GTE Mobilnet of Cleveland Incorporated,
                         its general partner


                         By:____________________________

                         Name:__________________________

                         Title:_________________________


                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]


                    TEXAS RSA 10B3 LIMITED PARTNERSHIP

                    By:  GTE Mobilnet of the Southwest Incorporated,
                         its general partner


                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]

                                       49
<PAGE>

                    GTE MOBILNET OF TEXAS RSA #11 LIMITED
                    PARTNERSHIP

                    By:  GTE Wireless of Houston Incorporated,
                         its general partner


                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]


                    GTE MOBILNET OF TEXAS RSA #16 LIMITED PARTNERSHIP

                    By:  GTE Wireless of Houston Incorporated,
                         its general partner


                          By:____________________________

                          Name:__________________________

                          Title:_________________________



                          Attest:________________________

                          Name:__________________________

                          Title:_________________________


                          [Corporate Seal]

                                       50
<PAGE>

                    GTE MOBILNET OF TEXASRSA #17 LILMITED
                    PARTNERSHIP

                    By:  GTE Wireless of Houston Incorporated,
                         its general partner


                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]



                    GTE MOBILNET OF TEXAS RSA #21 LIMITED PARTNERSHIP

                    By:  GTE Wireless of Houston Incorporated,
                         its general partner


                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]

                                       51
<PAGE>

                    GTE WIRELESS OF THE SOUTH INCORPORATED

                          By:____________________________

                          Name:__________________________

                          Title:_________________________



                          Attest:________________________

                          Name:__________________________

                          Title:_________________________


                          [Corporate Seal]


                    GTE WIRELESS OF HOUSTON INCORPORATED

                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]


                    GTE WIRELESS OF THE MIDWEST
                    INCORPORATED

                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]

                                       52
<PAGE>

                    GTE WIRELESS OF THE PACIFIC
                    INCORPORATED

                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]



                    GTE MOBILNET OF CLEVELAND
                    INCORPORATED

                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]


                    CROWN CASTLE GT CORP.

                         By:____________________________

                         Name:
                         Title:

                                       53
<PAGE>

                    GTE WIRELESS INCORPORATED

                         By:____________________________

                         Name:__________________________

                         Title:_________________________



                         Attest:________________________

                         Name:__________________________

                         Title:_________________________


                         [Corporate Seal]

                                       54

<PAGE>
                                                                   EXHIBIT 10.35

                                                                  CONFORMED COPY


                           LOAN AMENDMENT AGREEMENT
                  (POUNDS)64,000,000 REVOLVING LOAN FACILITY
    BEING AMENDED TO (POUNDS)150,000,000 TERM AND REVOLVING LOAN FACILITIES

DATE: 18th June, 1999

PARTIES

1.   CASTLE TRANSMISSION INTERNATIONAL LTD. (formerly known as Castle
     Transmission Services Limited), a company incorporated in England (number
     3196207), of Warwick Technology Park, Gallows Hill, Heathcote Lane, Warwick
     CV34 6TN, as borrower

2.   CASTLE TRANSMISSION SERVICES (HOLDINGS) LTD, a company incorporated in
     England (number 3242381), of Warwick Technology Park, Gallows Hill,
     Heathcote Lane, Warwick CV34 6TN and MILLENNIUM COMMUNICATIONS LIMITED, a
     company incorporated in England (number 2903056), of Warwick Technology
     Park, Gallows Hill, Heathcote Lane, Warwick CV34 6TN, as guarantors

3.   THE LENDERS listed in Schedule 1, as lenders

4.   CREDIT SUISSE FIRST BOSTON, as lead arranger

5.   CREDIT LYONNAIS, THE INDUSTRIAL BANK OF JAPAN, LIMITED, THE ROYAL BANK OF
     SCOTLAND PLC AND SCOTIABANK EUROPE PLC, as arrangers

6.   CREDIT SUISSE FIRST BOSTON, as agent (the "AGENT")

BACKGROUND

(A)  On 28th February, 1997 the loan agreement (in the form it was in at that
     date) was entered into between the Borrower, the Parent, certain lenders,
     the Agent and others and under its terms the lenders agreed to provide term
     and revolving loan facilities of (Pounds)162,500,000 to the Borrower.  On
     21st May, 1997 the parties to the loan agreement (except Millennium)
     amended the loan agreement.  Under the loan agreement (as amended at that
     date) the lenders under it agreed to provide revolving loan facilities of
     (Pounds)64,000,000 to the Borrower.  These loan facilities are guaranteed
     by the Parent and secured by charges granted by the Borrower and the
     Parent.  With effect from 27th October, 1998 Millennium acceded to the
     Existing Loan Agreement as an additional guarantor and acceded to the
     Debenture (in the form it was in at that date) as an additional chargor.

(B)  At the request of the Borrower the parties have agreed to amend the terms
     of the Existing Loan Agreement on the terms of this Agreement.

The parties agree as follows:
<PAGE>



                                CONFORMED COPY
                                --------------

1.   INTERPRETATION

1.1  LOAN AGREEMENT

     The interpretation provisions contained in Part I of the Amended Loan
     Agreement are deemed to be incorporated expressly in this Agreement, and
     apply to this Agreement accordingly.

1.2  DEFINITIONS

     In this Agreement:

     "AMENDMENT DATE" means 18th June, 1999

     "AMENDED LOAN AGREEMENT" means the Existing Loan Agreement as it will be
     amended under the terms of this Agreement with effect from the Amendment
     Date and as set out in Schedule 2 to this Agreement.

     "DEPOSIT CHARGE AMENDMENT AGREEMENT" means the deposit charge amendment
     agreement expected to be dated the same date as this Agreement and made
     between the Borrower and Credit Suisse First Boston.

     "EXISTING LOAN AGREEMENT" means the loan agreement dated 28th February,
     1997 as amended on 21st May, 1997 and as acceded to by Millennium, made
     between the Borrower, the Parent, the lenders named in it, Credit Suisse
     First Boston and others under which the lenders agreed to provide
     (Pounds)64,000,000 revolving loan facilities.

     "LENDERS" means the lenders whose names are set out in Schedule 1 to this
     Agreement.

     "INTER-COMPANY LOAN AMENDMENT AGREEMENT" means the agreement expected to be
     dated the same date as this Agreement and made between the Borrower and CT
     Finance which amends and restates the Inter-Company Loan Agreement.

     "SUPPLEMENTAL AND AMENDMENT DEED" means the supplemental and amendment deed
     expected to be dated the same date as this Agreement which supplements and
     amends the Debenture.

1.3  SCOPE

     This Agreement is supplemental to and amends the Existing Loan Agreement.
<PAGE>

                                CONFORMED COPY
                                --------------

2.   CONDITIONS PRECEDENT

2.1  CONDITIONS PRECEDENT

     The Borrower agrees to deliver all the items listed in Schedule 3 to the
     Amended Loan Agreement to the Agent by 8.00 a.m. on  the Amendment Date, in
     a form satisfactory to the Agent

2.2  REPAYMENT
     The Amendment Date must be a date on which all the Advances outstanding
     under the Existing Loan Agreement are due to be repaid.

2.3  NOTICE OF BORROWING

     The Borrower agrees to deliver to the Agent on or before the Amendment Date
     a notice of borrowing in accordance with the provisions of Clause 6 of the
     Amended Loan Agreement requesting a drawing of at least (Pounds)55,500,000
     on the Amendment Date.

3.   AMENDMENT OF THE LOAN AGREEMENT

3.1  NOTICE TO THE LENDERS

     This Clause applies if:

     (A)  the Agent receives the items described in Clause 2.1 by 8.00 a.m. on
          the Amendment Date;

     (B)  the Agent receives the notice or notices of borrowing described in
          Clause 2.3 on or before the Amendment Date; and

     (C)  the requirements of Clause 6.4 of the Amended Loan Agreement are
          satisfied at the Amendment Date.

     In this event the Agent will notify the Lenders of this in writing at the
     Amendment Date.

3.2  EFFECT OF NOTICE

     With effect from the Agent giving (or being obliged to give) the notice
     described in Clause 3.1, each of the following will occur:

     (A)  The Existing Loan Agreement will be amended so that it will be read
          and construed as is set out in Schedule 2. The Existing Loan Agreement
          as amended will remain in full force and effect. References to the
          Loan
<PAGE>

                                CONFORMED COPY
                                --------------

          Agreement, however expressed, will be read and construed as references
          to both the Existing Loan Agreement as amended by this Agreement and
          (unless the context otherwise requires) to this Agreement.

     (B)  The Supplemental and Amendment Deed, the Deposit Charge Amendment
          Agreement and the Inter-Company Loan Amendment Agreement will take
          effect in accordance with their respective terms.

     (C)  Each Lender will advance its participation in the Advance or Advances
          requested in the notice or notices of borrowing described in Clause
          2.3 on the Amendment Date. The Advance or Advances will be made under
          the terms of the Amended Loan Agreement.

     (D)  The Borrower will pay on the Amendment Date the amount of commitment
          fee which accrued but has not yet been paid under the Existing Loan
          Agreement as at the Amendment Date.

4.   MISCELLANEOUS

4.1  EXPIRY

     The obligations and rights constituted by this Agreement will be
     extinguished on the date one month after the date of this Agreement if the
     conditions set out in Clause 3.1 have not been satisfied on or prior to
     that date.

4.2  LAW

     This Agreement is to be governed by and construed in accordance with
     English law.

4.3  COUNTERPARTS

     There may be several signed copies of this Agreement.  There is intended to
     be a single Agreement and each signed copy is a counterpart of that
     Agreement.
<PAGE>

                                CONFORMED COPY
                                --------------

                                   SIGNATURES

BORROWER
- --------

CASTLE TRANSMISSION INTERNATIONAL LTD.

Address:       Warwick Technology Park,
               Gallows Hill,
               Heathcote Lane,
               Warwick CV34 6TN.

Fax Number:    01926 416441

Attention:     Company Secretary

By:            ALAN REES

PARENT AND GUARANTOR
- --------------------

CASTLE TRANSMISSION SERVICES (HOLDINGS) LTD

Address:       Warwick Technology Park,
               Gallows Hill,
               Heathcote Lane,
               Warwick  CV34 6TN.

Fax Number:    01926 416 441

Attention:     Company Secretary

By:            ALAN REES


ADDITIONAL GUARANTOR
- --------------------

MILLENNIUM COMMUNICATIONS LIMITED

Address:       Warwick Technology Park,
               Gallows Hill,
               Heathcote Lane,
               Warwick  CV34 6TN.

Fax Number:    01926 416 441

Attention:     Company Secretary
<PAGE>

                                CONFORMED COPY
                                --------------


By:            ALAN REES



LEAD ARRANGER
- -------------

CREDIT SUISSE FIRST BOSTON

By:  IAN PIDDOCK    JULIE GAVIN


ARRANGERS
- ---------

CREDIT LYONNAIS

By:  JULIE GAVIN AS ATTORNEY


THE INDUSTRIAL BANK OF JAPAN, LIMITED

By:  JULIE GAVIN AS ATTORNEY


THE ROYAL BANK OF SCOTLAND PLC

By:  JULIE GAVIN AS ATTORNEY


SCOTIABANK EUROPE PLC

By:  JULIE GAVIN AS ATTORNEY


LENDERS
- -------

CREDIT SUISSE FIRST BOSTON

Address:       Five Cabot Square, London, E14 4QR

Fax Number:    0171 888 8398

Telex Number:  887 322

Attention:     Client Services Unit
<PAGE>

                                CONFORMED COPY
                                --------------


By:  IAN PIDDOCK    JULIE GAVIN
<PAGE>

                                CONFORMED COPY
                                --------------

CREDIT LYONNAIS

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Broadwalk House,              Broadwalk House,
                       5 Appold Street,              5 Appold Street,
                       London EC2A 2DA.              London EC2A 2DA.

Fax Number:            0171 634 8353                 0171 214 7159

Telex Number:          885479                        885479

Attention:             Steve White                   Simon Parker

By:                    JULIE GAVIN AS ATTORNEY


THE INDUSTRIAL BANK OF JAPAN, LIMITED


                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Bracken House,                Bracken House,
                       One Friday Street,            One Friday Street,
                       London EC4M 9JA.              London EC4M 9JA.

Fax Number:            0171 815 2288/9               0171 815 2245

Telex Number:          886939 KOGINL G               886939 KOGINL G

Attention:             Mary Roe                      Paul Dignam

By:                    JULIE GAVIN AS ATTORNEY


THE ROYAL BANK OF SCOTLAND PLC


                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               CBO, PO Box 450,              Waterhouse Square,
                       5-10 Great Tower St.,         138-142 Holborn,
                       London EC3P 3HX.              London EC1N 2TH.

Fax Number:            0171 220 7370                 0171 427 9920

Telex Number:          8956751                       8956751

Attention:             Kevin Mann                    Richard Green

By:                    JULIE GAVIN AS ATTORNEY
<PAGE>

                                CONFORMED COPY
                                --------------

SCOTIABANK EUROPE PLC

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Scotia House,                 Scotia House,
                       33 Finsbury Square,           33 Finsbury Square,
                       London EC2A 1BB.              London EC2A 1BB.

Fax Number:            0171 826 5857                 0171 826 5987

Telex Number:          885188/9                      885188/9

Attention:             Anita Mills/Steven Caller     Paul Shanley/David Sparkes

By:                    JULIE GAVIN AS ATTORNEY


ALLIED IRISH BANKS PLC (LONDON BRANCH)

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               12, Old Jewry,                AIB International Centre,
                       London EC2R 8DP.              IFSC Centre,
                                                     Dublin 1,
                                                     Ireland.

Fax Number:            0171 726 8735                 00 353 1 829 0269

Attention:             Maura O Sullivan/             Laurence Enderson/
                       Marian Winger                 Conor Geary


By:                    JULIE GAVIN AS ATTORNEY



THE GOVERNOR AND COMPANY OF THE BANK OF IRELAND
P.O. Box 27, Broad Quay, Bristol BS99 7AX

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               BOIIF Loans                   Project Finance,
                       Administration,               Bank of Ireland
                       Hume House,                    International Finance,
                       Ballsbridge,                  La Touche House,
                       Dublin 4,                     IFSC,
                       Ireland.                      Dublin 1,
                                                     Ireland.

Fax Number:            00 353 1 618 7470             00 353 1 829 0129

Attention:             Edward Meagher                David Ryan/
                                                     Deiordre Flannery

By:                    JULIE GAVIN AS ATTORNEY
<PAGE>

                                CONFORMED COPY
                                --------------


THE GOVERNOR AND COMPANY OF THE BANK OF SCOTLAND


                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Bank of Scotland              Bank of Scotland
                       International Division,       International Division,
                       30 Queensferry Road,          30 Queensferry Road,
                       Edinburgh EH4 2UG.            Edinburgh EH4 2UG.

Fax Number:            0131 343 7080                 0131 343 7026

Attention:             Barry Cairns, Loans           Stephen J. Green,
                       Administration                Assistant Manager,
                                                     Project & Specialised
                                                      Finance
By:                    JULIE GAVIN AS ATTORNEY


BAYERISCHE LANDESBANK GIROZENTRALE, LONDON BRANCH

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Bavaria House,                Bavaria House,
                       13/14 Appold Street,          13/14 Appold Street,
                       London EC2A 2NB.              London EC2A 2NB.

Fax Number:            0171 955 5173                 0171 955 5700

Telex Number:          886437                        886437

Attention:             David Mellotte, Loan          Paula Kirkland,
                       Administration                Structured Finance

By:                    JULIE GAVIN AS ATTORNEY


DE NATIONALE INVESTERINGSBANK N.V., LONDON BRANCH


                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               22 Eastcheap,                 22 Eastcheap,
                       London EC3M 1LA.              London EC3M 1LA.

Fax Number:            0171 929 4009                 0171 929 4009

Telex Number:          920090                        920090

Attention:             Simon Fish, Operations        Andrew Kuyk, Manager
                        Manager

By:                    JULIE GAVIN AS ATTORNEY
<PAGE>

                                CONFORMED COPY
                                --------------


DEXIA PROJECT & PUBLIC FINANCE INTERNATIONAL BANK, LONDON BRANCH

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               55 Tufton Street,             55 Tufton Street,
                       Westminster,                  Westminster,
                       London SW1P 3QF.              London SW1P 3QF.

Fax Number:            0171 799 2117                 0171 976 0976

Attention:             Justin Wyatt, Senior          Victoria Derby, Manager,
                        Manager, Operations          Project Finance

By:                    JULIE GAVIN AS ATTORNEY


THE FUJI BANK, LIMITED

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               River Plate House,            River Plate House,
                       7-11 Finsbury Circus,         7-11 Finsbury Circus,
                       London EC2M 7DH.              London EC2M 7DH.

Fax Number:            0171 588 1400                 0171 588 1400

Telex Number:          886352/886317 FUJIBK G        886352/886317 FUJIBK G

Attention:             Richard Hiscock,              Robert Pettitt, Senior
                       Manager, Credit &             Manager, Corporate
                        Loans Department              Relations Management Group

By:                    ROBERT PETTITT

KBC BANK N.V. LONDON BRANCH


                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               7th Floor,                    KBC Finance Ireland,
                       Exchange House,               KBC House,
                       Primrose Street,              International Financial
                       London EC2A 2HQ.               Services Centre,
                                                     Dublin 1,
                                                     Republic of Ireland.

Fax Number:            0171 256 4846                 00 353 1 670 0855

Attention:             Julian Wheeler/               Fiacra Nagle/
                       Martin Clarke                 Alan Hudson

By:                    JULIE GAVIN AS ATTORNEY
<PAGE>

                                CONFORMED COPY
                                --------------


LLOYDS BANK PLC

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Bank House,                   PO Box 787,
                       Wine Street,                  6-8 Eastcheap,
                       Bristol BS1 2AM.              London EC3M 1LL.

Fax Number:            0117 923 3367                 0171 661 4852

Telex Number:          888301                        888301

Attention:             Ted Roylance,                 Dean Byrne/Guy Reeves,
                       Loans Administration          Corporate Banking

By:                    DEAN BYRNE


THE CO-OPERATIVE BANK P.L.C.

                       Credit and Operations Contacts
                       ------------------------------

Address:               PO Box 101,
                       1 Balloon Street,
                       Manchester M60 4EP.

Fax Number:            0161 832 8274

Telex Number:          567274 COOPBKG

Attention:             Philip J. Basten,
                       Business Development Manager

By:                    JULIE GAVIN AS ATTORNEY


SOCIETE GENERALE, LONDON BRANCH

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               SG House,                     SG House,
                       41 Tower Hill,                41 Tower Hill,
                       London EC3N 4SG.              London EC3N 4SG.

Fax Number:            0171 638 6517                 0171 680 9478

Attention:             Karen Schwartz                Sarah Grant

By:                    JULIE GAVIN AS ATTORNEY
<PAGE>

                                CONFORMED COPY
                                --------------


THE SUMITOMO BANK, LIMITED

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Temple Court,                 Temple Court,
                       11 Queen Victoria Street,     11 Queen Victoria Street,
                       London EC4N 4TA.              London EC4N 4TA.

Fax Number:            0171 786 1569                 0171 248 3187

Telex Number:          887667                        887667

Attention:             Manager, Loans                Neil Jones
                        Administration

By:                    JULIE GAVIN AS ATTORNEY


THE DAI-ICHI KANGYO BANK, LTD


                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               DKB House,                    DKB House,
                       24 King William Street,       24 King William Street,
                       London EC4R 9DB.              London EC4R 9DB.

Fax Number:            0171 626 3648                 0171 200 9494

Attention:             Christine Hawkins,            Chris Williams,
                       Manager                       Senior Manager

By:                    JULIE GAVIN AS ATTORNEY


ULSTER BANK LIMITED

                       Operations Contact            Credit Contact
                       ------------------            ----------------

Address:               Ulster Bank Markets,          Ulster Bank Markets,
                       11-16 Donegall Square East,   Ulster Bank Group Centre,
                       Belfast BT1 5HD,              George's Quay,
                       Ireland.                      Dublin 2,
                                                     Ireland.

Fax Number:            00 353 1 608 4199             00 353 1 608 4145

Telex Number:          93980                         93980

Attention:             Catherine Green/              Niall Tuite/
                       Deidre Hammond                Brendan Heneghan

By:                    JULIE GAVIN AS ATTORNEY
<PAGE>

                                CONFORMED COPY
                                --------------

AGENT
- -----
CREDIT SUISSE FIRST BOSTON

Address:          Five Cabot Square,
                  London  E14 4QR

Fax Number:       0171 888 8398

Attention:        Agency Services Unit

By:               IAN PIDDOCK            JULIE GAVIN
<PAGE>

                                CONFORMED COPY
                                --------------


                                   SCHEDULE 1
                                   ----------

                                    LENDERS
                                    -------

Credit Suisse First Boston

Credit Lyonnais

The Industrial Bank of Japan, Limited

The Royal Bank of Scotland plc

Scotiabank Europe plc

Allied Irish Banks PLC (London Branch)

The Governor and Company of the Bank of Ireland

The Governor and Company of the Bank of Scotland

Bayerische Landesbank Girozentrale, London Branch

De Nationale Investeringsbank N.V., London Branch

Dexia Project & Public Finance International Bank, London Branch

The Fuji Bank, Limited

KBC Bank N.V., London Branch

Lloyds Bank Plc

The Co-operative Bank p.l.c.

Societe Generale, London Branch

The Sumitomo Bank Limited

The Dai-Ichi Kangyo Bank, Ltd

Ulster Bank Limited
<PAGE>

                                CONFORMED COPY
                                --------------


                                   SCHEDULE 2
                                   ----------

                             AMENDED LOAN AGREEMENT

See following pages.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

 DATE: 28TH FEBRUARY, 1997 AS AMENDED ON 21ST MAY, 1997 AND ON 18TH JUNE, 1999


                    CASTLE TRANSMISSION INTERNATIONAL LTD.
                                  AS BORROWER


                 CASTLE TRANSMISSION SERVICES (HOLDINGS) LTD.

                                      AND

                       MILLENNIUM COMMUNICATIONS LIMITED
                                 AS GUARANTORS


                       THE LENDERS LISTED IN SCHEDULE 1


                          CREDIT SUISSE FIRST BOSTON
                               AS LEAD ARRANGER


                                CREDIT LYONNAIS
                     THE INDUSTRIAL BANK OF JAPAN, LIMITED
                        THE ROYAL BANK OF SCOTLAND PLC
                                      AND
                             SCOTIABANK EUROPE PLC
                                 AS ARRANGERS


                          CREDIT SUISSE FIRST BOSTON
                                   AS AGENT


   _________________________________________________________________________
   (Pounds)150,000,000 TERM AND REVOLVING LOAN FACILITIES WITH A EURO OPTION
  __________________________________________________________________________


                               Slaughter and May
                             35 BASINGHALL STREET
                               LONDON  EC2V 5DB

                                   (AGB/HZM)

                                 CC983390.001
<PAGE>
                                                                  CONFORMED COPY
                                                                  --------------
                                   CONTENTS

CLAUSE                                                                 PAGE

PART I: INTERPRETATION                                                    2

1. INTERPRETATION AND CALCULATIONS                                        2

PART II :  THE FACILITIES                                                15

2. THE FACILITIES                                                        15

3. THE LENDERS AND THE BORROWER                                          16

4. FEES AND EXPENSES                                                     16

5. CANCELLATION                                                          19

PART III : THE LOAN                                                      22

6. ADVANCE OF FUNDS                                                      22

7. CURRENCY OPTION                                                       25

8. INTEREST                                                              26

9. REPAYMENT                                                             30

10. PREPAYMENT                                                           33

PART IV: CHANGES OF CIRCUMSTANCES AND PAYMENTS                           39

11. CHANGES OF CIRCUMSTANCES                                             39

12. PAYMENTS                                                             44

13. LATE PAYMENT                                                         46

14. SHARING AMONG LENDERS                                                46

PART V : GUARANTEE AND INDEMNITY                                         48

15. GUARANTEE                                                            48

16. GUARANTOR'S INDEMNITY                                                50

PART VI : REPRESENTATIONS, COVENANTS AND TERMINATION EVENTS              51

17. REPRESENTATIONS                                                      51

18. INFORMATION COVENANTS                                                55

19. FINANCIAL COVENANTS                                                  59

20. GENERAL COVENANTS                                                    64

21. TERMINATION EVENTS                                                   75

PART VII : MISCELLANEOUS                                                 80

22. THE AGENT AND THE ARRANGERS                                          80

23. EVIDENCE AND CERTIFICATES                                            84

24. NOTICES                                                              85
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                                                                  CONFORMED COPY
                                                                  --------------


25. ASSIGNMENT AND NOVATION                                              85

26. WAIVERS, AMENDMENTS AND RELEASES OF SECURITY                         87

27. MISCELLANEOUS                                                        88

28. LAW                                                                  88

SCHEDULE 1: LENDERS AND COMMITMENTS                                      89

SCHEDULE 2: COSTS RATE                                                   91

SCHEDULE 3: CONDITIONS PRECEDENT TO DRAWING ON OR AFTER THE AMENDMENT
DATE                                                                     93

SCHEDULE 4: FORM OF SUBSTITUTION CERTIFICATE                             95

SCHEDULE 5: FORM OF NOTICE FOR THE ADVANCE                               97

SCHEDULE 6:  FORM OF ADDITIONAL GUARANTOR AGREEMENT                      98

SCHEDULE 7: FORM OF CONFIDENTIALITY UNDERTAKING                         100

SCHEDULE 8: FORM OF OPINION OF SLAUGHTER AND MAY                        102

SCHEDULE 9: FORM OF OVERDRAFT BANK AGREEMENT                            110

SCHEDULE 10:  FORM OF HEDGING BANK AGREEMENT                            115

SCHEDULE 11: REQUIREMENTS FOR HEDGING CONTRACTS                         121
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                             DATE: 18th June, 1999


                     CASTLE TRANSMISSION INTERNATIONAL LTD.
                                  AS BORROWER


                  CASTLE TRANSMISSION SERVICES (HOLDINGS) LTD.

                                      AND

                       MILLENNIUM COMMUNICATIONS LIMITED
                                 AS GUARANTORS


                        THE LENDERS LISTED IN SCHEDULE 1


                           CREDIT SUISSE FIRST BOSTON
                                AS LEAD ARRANGER


                                CREDIT LYONNAIS
                     THE INDUSTRIAL BANK OF JAPAN, LIMITED
                         THE ROYAL BANK OF SCOTLAND PLC
                             SCOTIABANK EUROPE PLC
                                  AS ARRANGERS



                           CREDIT SUISSE FIRST BOSTON
                                    AS AGENT


           _________________________________________________________

                            LOAN AMENDMENT AGREEMENT

                   (Pounds)64,000,000 REVOLVING LOAN FACILITY

    BEING AMENDED TO (Pounds)150,000,000 TERM AND REVOLVING LOAN FACILITIES

           _________________________________________________________

                               SLAUGHTER AND MAY
                              35 BASINGHALL STREET
                                    LONDON

                                    EC2V 5DB

                                   (AGB/HZM)



<PAGE>

                                                                  CONFORMED COPY


                                LOAN AGREEMENT

DATE: 28th February, 1997 as amended on 21st May, 1997 and on 18th June, 1999

PARTIES

1.   CASTLE TRANSMISSION INTERNATIONAL LTD. (formerly known as Castle
     Transmission Services Limited), a company incorporated in England (number
     3196207), of Warwick Technology Park, Gallows Hill, Heathcote Lane, Warwick
     CV34 6TN, as borrower

2.   CASTLE TRANSMISSION SERVICES (HOLDINGS) LTD., a company incorporated in
     England (number 3242381), of Warwick Technology Park, Gallows Hill,
     Heathcote Lane, Warwick CV34 6TN and MILLENNIUM COMMUNICATIONS LIMITED, a
     company incorporated in England (number 2903056), of Warwick Technology
     Park, Gallows Hill, Heathcote Lane, Warwick CV34 6TN, as guarantors

3.   THE LENDERS listed in Schedule 1, as lenders

4.   CREDIT SUISSE FIRST BOSTON, as lead arranger

5.   CREDIT LYONNAIS, THE INDUSTRIAL BANK OF JAPAN, LIMITED, THE ROYAL BANK OF
     SCOTLAND PLC and SCOTIABANK EUROPE PLC as arrangers

6.   CREDIT SUISSE FIRST BOSTON, as agent

BACKGROUND

(A)  At the request of the Borrower the Lenders are willing to provide a
     (Pounds)100,000,000 revolving facility which will convert into a term loan
     facility on the third anniversary of the Amendment Date and a
     (Pounds)50,000,000 revolving loan facility to the Borrower on the terms of
     this Agreement.  The loan facilities will contain a euro option.  In
     addition, the loan facilities are to be guaranteed by the Guarantors and
     secured by the Charges granted by the Borrower and the Guarantors.

(B)  The Borrower has utilised all the amounts advanced to it under this
     Agreement before the Amendment Date for the purpose of acquiring "DTT
     Equipment", as defined in the Bonds.

The parties agree as follows:
<PAGE>

                            PART I: INTERPRETATION

1.   INTERPRETATION AND CALCULATIONS

1.1  DEFINITIONS
     In this Agreement:

     "ADVANCE" means an advance made, or to be made, under Clause 6.

     "ADVANCE DATE" means the date, or proposed date, of an Advance.

     "AGENT" means Credit Suisse First Boston, in its capacity as agent for the
     Lenders, acting through its office at Five Cabot Square, London E14 4QR or
     any other office in England which it may notify to the Borrower and the
     Lenders.  If there is a change of Agent in accordance with Clause 22.12,
     "AGENT" will instead mean the new Agent appointed under that Clause.

     "AMENDMENT DATE" has the meaning described in Clause 0.

     "ANALOGUE TRANSMISSION AGREEMENT" means the agreement between the Borrower
     and the BBC dated 27th February, 1997 as amended by an amending agreement
     dated 16th July, 1998 relating to the analogue transmission by the Borrower
     of television and radio programmes produced by the BBC.

     "ANALOGUE TRANSMISSION BUSINESS" means the business previously carried on
     by the BBC and assumed by the Borrower under the transfer scheme dated 24th
     February, 1997 made by the BBC in favour of, among others, the Borrower.
     This business is the provision of broadcasting, transmission and signal
     distribution services for radio and analogue television.

     "APPLICABLE MARGIN" means the rate determined in accordance with Clause
     8.8.

     "ARRANGERS" means each of Credit Suisse First Boston in its capacity as
     lead arranger and Credit Lyonnais, The Industrial Bank of Japan, Limited,
     The Royal Bank of Scotland plc and Scotiabank Europe Plc, in their
     capacities as arrangers of the Facilities.

     "AUTHORISED PERSON" means a person authorised to sign documents on behalf
     of a Company under this Agreement by virtue of a resolution of the
     directors of that Company a certified copy of which has been delivered to
     the Agent.  A person will cease to be an "AUTHORISED PERSON" upon notice by
     the appointing Company to the Agent.

     "AVAILABLE COMMITMENT" means Available Facility A Commitment or Available
     Facility B Commitment or both.

     "AVAILABLE FACILITY A COMMITMENT" means the amount of a Lender's Facility A
     Commitment which is available for the Borrower.  On any day, it is the
     Facility A Commitment of that Lender less that Lender's participation in
     all outstanding Facility A Advances.  Participations in Facility A Advances
     in the Optional Currency will be taken at their Original Sterling Amount.

     "AVAILABLE FACILITY B COMMITMENT" means the amount of a Lender's Facility B
     Commitment which is available to the Borrower.  On any day it is that
     Lender's Facility B Commitment on that day less that Lender's aggregate
     participation in all outstanding Facility B Advances.  Participations in
     Facility B Advances in the Optional Currency will be taken at their
     Original Sterling Amount.

     "BBC" means The British Broadcasting Corporation.
<PAGE>

     "BBC DTT TRANSMISSION AGREEMENT" means the DTT transmission agreement
     entered into between the Borrower and BBC dated 10th February, 1998 under
     which the Borrower has agreed to provide, amongst other things,
     distribution and transmission services to the BBC in relation to multiplex
     facilities for DTT.

     "BONDS" means the (Pounds)125,000,000 Guaranteed Bonds due 2007 issued on
     21st May, 1997 by CT Finance.

     "BORROWER" means Castle Transmission International Ltd., the first party to
     this Agreement.

     "BORROWER'S GROUP" means:

     (A)  if the Borrower has no Subsidiaries, the Borrower; and

     (B)  if the Borrower has Subsidiaries, the Borrower and its Subsidiaries
          taken as a whole.

     "BORROWER'S RESTRICTED GROUP" has the meaning described in Clause 19.1.

     "BUSINESS DAY" means a day on which banks are open for inter-bank payments
     in London.

     "CCIC" means Crown Castle International Corporation.

     "CCIC AFFILIATE" means a wholly-owned Subsidiary of CCIC other than a
     member of the Borrower's Group.

     "Certifying Financial Officer" means:

     (A)  the senior financial officer of the Borrower; or

     (B)  any other person authorised to sign certificates under this Agreement
          on behalf of the Borrower in place of the senior financial officer and
          who is so authorised by virtue of a resolution of the directors of the
          Borrower (a certified copy of which has been delivered to the Agent).

     "CHARGED ACCOUNT" means the account of the Borrower with the Agent which is
     the subject of the Deposit Agreement and Charge on Cash Deposits.

     "CHARGES" means:

     (A)  the Debenture;

     (B)  the Deposit Agreement and Charge on Cash Deposits;

     (C)  each deed of accession executed and delivered pursuant to Clause 28.2
          of the Debenture including the deed of accession entered into between
          Millennium, the Parent and the Agent as of 27th October, 1998;

     (D)  any other document creating in any foreign jurisdiction a form of
          security similar to that created under the Debenture in a form
          satisfactory to the Agent but which shall not contain terms materially
          more onerous than the Debenture;

     (E)  the Scottish Charge;

     (F)  the Northern Irish Charge; and

     (G)  any other document executed in accordance with the terms of a "CHARGE"
          or this Agreement and expressed to be, or to be supplemental to, a
          Charge.
<PAGE>

     "COMMITMENTS" means Facility A Commitments and Facility B Commitments.

     "COMPANY" means any of the Borrower and each Guarantor.

     "CONTRACT OF SERVICES" means the contract of services in the agreed form
     between the Borrower and CCIC.

     "CONVERSION DATE" means the third anniversary of the Amendment Date.  If
     this date is not a Business Day the "CONVERSION DATE" will instead be the
     next Business Day, unless that day is in another calendar month.  Where it
     is in another calendar month that "CONVERSION DATE" will instead be the
     preceding Business Day.

     "CONVERTED FACILITY A ADVANCE" means a Facility A Advance(s) outstanding
     with effect from the Conversion Date or any Facility A Advance into which
     this Converted Facility A Advance is split or consolidated in accordance
     with Clause 8.1(B).

     "COSTS RATE" means a rate per annum determined by the Agent and notified to
     the Borrower.  This rate will be applied to an outstanding amount in
     sterling for a particular period.  It will be calculated in accordance with
     Schedule 2.

     "CT FINANCE" means Castle Transmission (Finance) plc (a company
     incorporated in England and Wales with registered number 3347387).

     "DEBENTURE" means the debenture creating fixed and floating charges or, in
     the case of the Parent, a charge over the shares held by it in the Borrower
     dated 28th February, 1997 and made between the Parent, the Borrower and
     Credit Suisse First Boston as trustee for the Lenders as acceded to by
     Millennium as of 27th October, 1998 and as supplemented and amended by the
     Supplemental and Amendment Deed.

     "DEBT COVERAGE" has the meaning described in Clause 19.1.

     "DEPOSIT AGREEMENT AND CHARGE ON CASH DEPOSITS" means the agreement dated
     28th February, 1997 and amended with effect from 21st May, 1997 and further
     amended by the Deposit Charge Amendment Agreement with effect from the
     Amendment Date and made between the Borrower as depositor and Credit Suisse
     First Boston as agent and trustee for the Lenders.

     "DEPOSIT CHARGE AMENDMENT AGREEMENT" means the agreement dated on or before
     the Amendment Date and made between the Borrower as depositor and Credit
     Suisse First Boston as agent and trustee for the Lenders amending the
     Deposit Agreement and Charge on Cash Deposits (as in effect before the
     Amendment Date).

     "DISTRIBUTION" means any dividend or other distribution (as defined in
     section 263(2) of the Companies Act 1985, but ignoring section 263(2)(b))
     or any loan to shareholders.

     "DTT" means digital terrestrial television.

     "DTT TRANSMISSION BUSINESS" means the business of providing DTT
     distribution and transmission services.

     "EBITDA" has the meaning described in Clause 19.1.

     "EMU LEGISLATION" means the legislative measures of the Council of the
     European Union providing for the introduction of, changeover to, or
     operation of, the euro.

     "EQUITY CONSORTIUM" means CCIC, TeleDiffusion de France International S.A.,
     Berkshire Partners LLC and funds managed by it and Candover Investments plc
     and funds managed by it.
<PAGE>

     "EQUIVALENT AMOUNT" means the amount in the Optional Currency equivalent to
     a specified amount in sterling. The "EQUIVALENT AMOUNT" will be calculated
     using the Exchange Rate applicable to the date on which the amount in the
     Optional Currency is to be or was advanced.

     "EURIBOR" means a rate per annum determined by the Agent and notified to
     the Borrower.  This rate will be applied to an outstanding amount in euros
     for a particular period.  It will be determined as follows:

     (A)  "EURIBOR" will be the Screen Rate for deposits in euro for that
          period.  This rate will be determined at or about 11.00 a.m. (Brussels
          time) on the Rate Fixing Date relating to the first day of that
          period.

     (B)  If there is no Screen Rate for euro for that period, "EURIBOR" will be
          calculated using the rate at which deposits in euro are offered to the
          Reference Banks for that period by leading banks in the European
          inter-bank market.  Each Reference Bank will notify the Agent of this
          rate when requested by the Agent.  The rate notified will be the rate
          as at 11.00 a.m. (Brussels time) on the Rate Fixing Date relating to
          the first day of that period.  The Agent will calculate the arithmetic
          mean of these rates, rounded upwards to five decimal places.  This
          will be "EURIBOR" for the period.  If fewer than two Reference Banks
          provide the Agent with notifications for a particular period, this
          method of determining "EURIBOR" will not be used for that period and
          Clause  11.3 will apply instead.

     "EURO" or "E" means the single currency of the participating member states
     in the Third Stage.

     "EURO UNIT" means a unit of the euro as defined in the EMU legislation.

     "EXCEPTIONAL ITEMS" has the meaning described in Clause 19.1.

     "EXCESS CASH FLOW" has the meaning described in Clause 10.3(G).

     "EXCHANGE RATE" means a rate of exchange for converting an amount in
     sterling into an amount in the Optional Currency. The "EXCHANGE RATE"
     applicable to any date will be the Agent's spot rate for the purchase of
     euro using sterling at or around 11.00 a.m. on the third Business Day
     before that date.

     "EXTRAORDINARY ITEMS" has the meaning described in Clause 19.1.

     "FACILITIES" means the loan facilities provided by this Agreement.

     "FACILITY A" means the loan facility described in Clause 2.1(A).

     "FACILITY A ADVANCE" means an Advance made or outstanding, or to be made,
     under Facility A.

     "FACILITY A COMMITMENT" means the amount which each Lender has committed to
     Facility A.  Each Lender's initial "FACILITY A COMMITMENT" is the amount
     set out next to its name in the column numbered (1) of Schedule 1.  This
     may be reduced or revised in accordance with this Agreement. In addition
     the amount of a Lender's "FACILITY A COMMITMENT" may be adjusted by
     assignments and assumptions in accordance with Clause 25.2 and novations in
     accordance with Clause 25.3.

     "FACILITY A COMMITMENT AVAILABILITY TERMINATION DATE" means the Conversion
     Date or, if earlier, the date Facility A is cancelled in full in accordance
     with the terms of this Agreement.

     "FACILITY A LOAN" means the principal amount borrowed and not repaid under
     Facility A.
<PAGE>

     "FACILITY A REPAYMENT DATE" means each of the nine dates set out in Clause
     9.3. If any of those dates is not a Business Day that "FACILITY A REPAYMENT
     DATE" will instead be the next Business Day, unless that day is in another
     calendar month.  Where it is in another calendar month that "FACILITY A
     REPAYMENT DATE" will instead be the preceding Business Day.

     "FACILITY B" means the revolving loan facility described in Clause 2.1(B).

     "FACILITY B ADVANCE" means an Advance made, or to be made, under the
     Facility B.

     "FACILITY B COMMITMENT" means the amount which a Lender has committed to
     Facility B.  Each Lender's initial "FACILITY B COMMITMENT" is the amount
     set out next to its name in the column numbered (2) of Schedule 1.  This
     may be reduced or revised in accordance with this Agreement. In addition
     the amount of a Lender's "FACILITY B COMMITMENT" may be adjusted by
     assignments and assumptions in accordance with Clause 25.2 and novations in
     accordance with Clause 25.3.

     "FACILITY B LOAN" means the principal amount borrowed and not repaid under
     Facility B.

     "FACILITY TERMINATION DATE" means the seventh anniversary of the Amendment
     Date or, if earlier, the first date on which both Facility A is cancelled
     in full and Facility B is cancelled in full, in either case, in accordance
     with the terms of this Agreement.

     "FINANCIAL INDEBTEDNESS" has the meaning described in Clause 19.1.

     "FINANCIAL MODEL" means the management case model dated 9th June, 1999
     which is described on its face as "Management Case, printed on 9th June,
     1999 at 11.49 a.m." in the agreed form.

     "FINANCING DOCUMENT" means each of this Agreement and each Charge (and
     includes each amending agreement relating to any of them).

     "FIXED CHARGE COVERAGE SERVICE RATIO" has the meaning described in Clause
     19.1.

     "FURTHER ACQUISITION" has the meaning described in Clause 20.1(L).

     "GENERALLY ACCEPTED ACCOUNTING PRINCIPLES" means, at any time, accounting
     principles generally accepted and adopted in England at such time.

     "GROUP" means the Parent and its Subsidiaries.

     "GUARANTEE" means the guarantee of amounts due under this Agreement
     contained in Clause 15.

     "GUARANTOR" means:

     (A)  the Parent, Millennium and each Restricted Subsidiary which has become
          an additional guarantor in accordance with Clause 20.1(R); and

     (B)  the Borrower in respect of the obligations of each Restricted
          Subsidiary under an Overdraft Bank Agreement.

     "HEDGING BANK" means any Lender or any affiliate of any Lender which is
     from time to time a party to a Hedging Contract.

     "HEDGING BANK AGREEMENT" means an agreement substantially in the form of
     Schedule 10.
<PAGE>

     "HEDGING CONTRACT" means a contract entered into by the Borrower as part of
     its implementation of the Hedging Policy and includes all transactions
     entered into under that contract.

     "HEDGING POLICY" means the hedging policy of the Borrower and in a form
     satisfactory to the Agent which is delivered by the Borrower under
     paragraph 17 of Schedule 3.

     "HOLDING COMPANY" has the meaning described in section 736 of the Companies
     Act 1985.

     "INDEBTEDNESS FOR BORROWED MONEY" of any person means:

     (A)  all obligations of that person for borrowed money,

     (B)  any indebtedness under any acceptance credit opened on behalf of that
          person,

     (C)  the face amount of any bills of exchange (issued for the purposes of
          raising finance) for which that person is liable,

     (D)  all obligations of that person under any bond, debenture, note or
          similar instrument (but excluding any of the same which are issued in
          connection with the performance of obligations under contracts which
          are not payment obligations),

     (E)  all obligations of that person in respect of any interest rate or
          currency swap or forward currency sale or purchase or other form of
          interest or currency hedging transaction (including without limit
          caps, collars and floors),

     (F)  all payment obligations of that person under any finance lease,

     (G)  all liabilities of that person (actual or contingent) under any
          guarantee, bond, security, indemnity or other agreement in respect of
          any Indebtedness for Borrowed Money of any other person, and

     (H)  any other liability (actual or contingent) undertaken by that person
          for the purpose of raising finance.

     "INFORMATION MEMORANDUM" means the information memorandum dated May, 1999
     prepared to assist in the syndication of the Facilities.

     "INSTRUCTING GROUP" means Lenders whose Facility A Commitments and Facility
     B Commitments in aggregate exceed 66.6% of the total.  If, however, an
     Advance has been made "INSTRUCTING GROUP" means Lenders whose
     participations in the Loan in aggregate exceed 66.6%.  The amount of
     participations in Advances in the Optional Currency will be taken at their
     Original Sterling Amount.

     "INTER-COMPANY LOAN AGREEMENT" means the inter-company loan agreement dated
     21st May, 1997, between CT Finance and the Borrower as amended on or around
     the Amendment Date.

     "INTEREST" has the meaning described in Clause 19.1.

     "INTEREST PERIOD" means each period described in Clause 8.1.

     "INVESTMENT AMOUNTS" means, in relation to any period, the aggregate of:

     (A)  Indebtedness for Borrowed Money incurred by, provided by or otherwise
          made available during that period by members of the Borrower's
          Restricted Group in
<PAGE>

          relation to Unrestricted Entities. For this purpose any contingent
          liabilities will be taken at their maximum amount;

     (B)  loans or other credit provided during that period by members of the
          Borrower's Restricted Group (to the extent not already included in
          paragraph (A) and with any contingent liabilities taken at their
          maximum amount);

     (C)  any investments made during that period by members of the Borrower's
          Restricted Group; and

     (D)  consideration paid during that period by members of the Borrower's
          Restricted Group in respect of Further Acquisitions. For this purpose
          the aggregate consideration paid will include any deferred purchase
          price payable (which, in the case of any earn-out, will be a fair
          estimate of the value of this earn-out) and any fair estimate of
          contingent costs or liabilities assumed in connection with the Further
          Acquisition (which shall include, in the case of joint ventures, any
          obligation of the type referred to in Clause 20.1(L)(i)(c)) details of
          which, in each case, must be set out in reasonable detail in the
          certificate delivered to the Agent by the Certifying Financial Officer
          under Clause 18.1(n). To the extent that amounts have already been
          taken into account in respect of any deferred purchase price payable
          or contingent costs or liabilities assumed these amounts will not be
          again taken into account during the period when they are paid,

     in each case, calculated so as to eliminate any double counting.

     "LENDER" means a lender listed in Schedule 1 acting through the office
     appearing under its name on the signature pages or any other office in the
     United Kingdom which it may notify to the Agent.  A lender which acquires
     an interest in the Facilities by way of assignment or novation will become
     a "LENDER" and will act through its office notified to the Agent.  The
     expression also includes a successor in title to a Lender.  A Lender will
     cease to be a "LENDER" if it assigns or novates its entire interest in the
     Facilities.

     "LENDER GROUP COMPANY" means a Lender or any Holding Company of a Lender.

     "LIBOR" means a rate per annum determined by the Agent and notified to the
     Borrower.  This rate will be applied to an outstanding amount in sterling
     for a particular period. It will be determined as follows:

     (A)  "LIBOR" will be the Screen Rate for deposits in sterling for that
          period. This rate will be determined at or about 11.00 a.m. on the
          Rate Fixing Date relating to the first day of that period.

     (B)  If there is no Screen Rate for deposits in sterling for that period,
          "LIBOR" will be calculated using the rate at which deposits in
          sterling are offered to the Reference Banks for that period by leading
          banks in the London inter-bank market. Each Reference Bank will notify
          the Agent of this rate when requested by the Agent. This rate will be
          determined at or about 11.00 a.m. on the Rate Fixing Date relating to
          the first day of that period. The Agent will calculate the arithmetic
          mean of these rates rounded upwards to five decimal places. This will
          be "LIBOR" for the period. If fewer than two Reference Banks provide
          the Agent with notifications for a particular period, this method of
          determining "LIBOR" will not be used for that period and Clause 11.3
          applies.

     "LOAN" means the aggregate principal amount borrowed and not repaid under
     the Facilities.

     "MATERIAL CONTRACT" means each Transmission Agreement, the NTL Site Sharing
     Agreement and any other contract generating 10% or more of the Borrower's
     gross
<PAGE>

     revenues (measured annually on the basis of the latest set of annual
     audited accounts of the Borrower delivered to the Agent under Clause
     18.1(a)).

     "MILLENNIUM" means Millennium Communications Limited, one of the second
     parties to this Agreement.

     "NATIONAL CURRENCY UNIT" or "NCU" means a unit of the euro (other than the
     euro unit) as defined in the EMU legislation.

     "NET CASH INTEREST" has the meaning described in Clause 19.1.

     "NET DISPOSAL PROCEEDS" means, in respect of a disposal, the gross proceeds
     of that disposal minus:

     (A)  reasonable costs of the disposal;

     (B)  liabilities (including, without limitation, liabilities to the BBC)
          which are required to be discharged as a result of the disposal (other
          than liabilities incurred in contemplation of it);

     (C)  provisions which the directors reasonably determine need to be made
          for taxes arising as a result of the disposal; and

     (D)  where the asset which is the subject of the disposal is being
          replaced, the cost of the replacement asset to the extent that it is
          acquired for cash within the period 6 months before or after the
          disposal.

     If the "NET DISPOSAL PROCEEDS" would be a negative number it will be taken
     to be zero.  Where a disposal is made for non-cash consideration, the gross
     proceeds of that disposal will be calculated as the market value of the
     assets disposed of, as certified to the Agent by the Borrower and, if the
     Agent requests, the Borrower's auditors.

     "NEW SUBSIDIARY" has the meaning given to it in Clause 20.1(R)(ii).

     "NORTHERN IRISH CHARGE" means the agreement to be executed after the
     Amendment Date and made by the Borrower in favour of the Agent creating a
     first fixed charge over certain real properties located in Northern
     Ireland.

     "NTL SITE SHARING AGREEMENT" means the deed dated 10th September, 1991
     between National Transcommunications Limited and the BBC relating to site
     sharing.

     "ONDIGITAL" means ONDIGITAL PLC (formerly known as British Digital
     Broadcasting PLC).

     "ONDIGITAL DTT TRANSMISSION AGREEMENT" means the DTT transmission agreement
     entered into between the Borrower and ONDIGITAL dated 18th December, 1997
     under which the Borrower has agreed to provide, amongst other things,
     distribution and transmission services to ONDIGITAL in relation to three
     multiplex facilities for DTT.

     "OPTIONAL CURRENCY" means euro.

     "ORIGINAL STERLING AMOUNT" means the sterling equivalent of an amount in
     the Optional Currency. The "ORIGINAL STERLING AMOUNT" will be derived by
     using the Exchange Rate applicable to the date on which the amount in the
     Optional Currency is to be or was advanced.

     "OVERDRAFT BANK" means any Lender or any affiliate of any Lender which from
     time to time provides Overdraft Facilities.
<PAGE>

     "OVERDRAFT BANK AGREEMENT" means an agreement substantially in the form of
     Schedule 9.

     "OVERDRAFT FACILITIES" means any overdraft facilities (which may be in
     sterling or other currencies) provided to the Borrower or any other member
     of the Borrower's Restricted Group by Overdraft Banks which have signed
     Overdraft Bank Agreements with the Borrower or, as the case may be, the
     other member of the Borrower's Restricted Group.

     "PARENT" means Castle Transmission Services (Holdings) Ltd., one of the
     second parties to this Agreement.

     "PARTICIPATING MEMBER STATES" means those member states of the European
     Union from time to time which adopt a single, shared currency in the Third
     Stage, as defined and identified in the EMU legislation.

     "POTENTIAL TERMINATION EVENT" means an event or state of affairs which is
     mentioned in Clause 21.1 but which has not become a Termination Event
     because a period has not elapsed or a notice has not been given.

     "QUARTER" means a financial quarter of the Borrower's financial year.

     "RATE FIXING DATE" means the day on which quotes are customarily taken for
     the relevant period:

     (A)  in the case of LIBOR, for deposits in sterling in the London inter-
          bank market; or

     (B)  in the case of EURIBOR, for deposits in euros in the European inter-
          bank market,

     in either case for delivery on the Advance Date (which, in relation to
     euro, means a day on which the Trans-european Automated Real time Gross
     settlement Express Transfer system (TARGET) is open).

     "Reference Banks" means, initially, the principal London (or, in the case
     of an amount in euros, Brussels) offices of Credit Suisse First Boston, The
     Royal Bank of Scotland plc and Scotiabank Europe plc.  The Agent, following
     consultation with the Borrower and the Lenders, may replace a "REFERENCE
     BANK" with another Lender or an affiliate of a Lender.  This replacement
     will take effect when notice is delivered to the Borrower and the Lenders.

     "RESTRICTED SUBSIDIARY" means any Subsidiary of the Borrower which is not
     then an Unrestricted Subsidiary and which, accordingly, is either:

     (A) required to become a Guarantor for the purposes of Clause 20.1(R); or

     (B)  not required to become a Guarantor for the purposes of Clause 20.1(R)
          as a result of Clause 20.1(R)(v).

     "Scottish Charge" means the agreement to be executed after the Amendment
     Date and made by the Borrower in favour of the Agent creating a first fixed
     charge over certain real properties located in Scotland.

     "SCREEN RATE" means the rate shown on:

     (A) in the case of LIBOR, Telerate page 3750; or

     (B) in the case of EURIBOR, Telerate page 248.
<PAGE>

     If either of these pages is replaced by another which displays the rates
     for inter-bank deposits offered by leading banks in London (in the case of
     LIBOR) or Europe (in the case of EURIBOR) the Agent may nominate an
     alternative page for the affected page.

     "SECURITY" means security of any type created or existing over any asset.
     "SECURITY" will also include retention of title arrangements, rights to
     retain possession and any arrangement providing a creditor with a prior
     right to an asset, or its proceeds of sale, over other creditors in a
     liquidation.

     "SHARE SALE AGREEMENT" means the Share Sale Agreement dated 23rd January,
     1997 and made between the BBC and the Parent concerning the acquisition by
     the Parent of the Borrower.  It also includes any disclosure letters.

     "SHAREHOLDERS AGREEMENT" means the Shareholders' Agreement dated 21st
     August, 1998 (replacing a shareholders agreement dated 23rd January, 1997)
     and made between CCIC, TeleDiffusion de France International S.A. and the
     Parent and to which Digital Future Investments B.V. acceded and replaced
     TeleDiffusion de France International S.A. as a party under a deed of
     adherence dated 6th April, 1999.

     "SUBORDINATED LOAN AGREEMENT" means the agreement dated 27th February, 1997
     between the Borrower, the Parent and the Agent relating to the provision of
     subordinated loans by the Parent to the Borrower.

     "SUBSIDIARY" has the meaning described in section 736 of the Companies Act
     1985.

     "SUBSTITUTION CERTIFICATE" means a document substantially in the form set
     out in Schedule 4.

     "SUPPLEMENTAL AND AMENDMENT DEED" means the deed dated on or before the
     Amendment Date and made between the Parent, the Borrower, Millennium and
     Credit Suisse First Boston as trustee for the Lenders supplementing and
     amending the Debenture (as in effect before the Amendment Date).

     "TDF ROLL-UP" has the meaning described in Clause 20.1(EE).

     "TERMINATION EVENT" has the meaning described in Clause 21.1.

     "THIRD STAGE" means the third stage of European economic and monetary union
     pursuant to the Treaty establishing the European Community (as amended from
     time to time).

     "TOTAL ANNUAL INVESTMENT LIMIT" means, in each financial year, the figure
     which is 10% of the gross assets of the Borrower's Restricted Group (as
     shown in the latest set of annual audited consolidated financial statements
     delivered to the Agent under Clause 18.1(b) at the time the relevant
     calculation in respect of the financial year in question is being made).

     "TOTAL FACILITY A COMMITMENTS" means the aggregate of the Facility A
     Commitments of all the Lenders.

     "TOTAL FACILITY B COMMITMENTS" means the aggregate of the Facility B
     Commitments of all the Lenders.

     "TOTAL INTEREST PAYABLE" has the meaning described in Clause 19.1.

     "TRANSMISSION AGREEMENTS" means the Analogue Transmission Agreement, the
     BBC DTT Transmission Agreement and the ONDIGITAL DTT Transmission Agreement
     or such one of them as the context requires.
<PAGE>

     "UNRESTRICTED ENTITY" means Unrestricted Subsidiaries and any other entity
     in which a member of the Restricted Group holds a less than majority
     interest.

     "UNRESTRICTED ENTITIES INVESTMENT LIMIT" means, at any time, the figure
     which is 10% of the gross assets of the Borrower's Restricted Group (as
     shown in the latest set of annual audited consolidated financial statements
     delivered to the Agent under Clause 18.1(b) at the time the relevant
     calculation in respect of the financial year in question is being made).

     "UNRESTRICTED SUBSIDIARY" has the meaning described in Clause 20.1(R)(ii).

     "YEAR 2000 PROGRAMME REPORT" means the report issued by the Borrower on 1st
     June, 1999 in relation to Year 2000 readiness (as amended and updated from
     time to time).

1.2  INTERPRETATION OF CERTAIN REFERENCES
     Unless a contrary intention is indicated:

     (A)  References to Clauses and Schedules are to Clauses of, and the
          Schedules to, this Agreement. References to paragraphs are to
          paragraphs in the same sub-clause. References to sub-paragraphs are to
          sub-paragraphs in the same paragraph.

     (B)  References to other documents include those documents as they may be
          amended in the future.

     (C)  References to times are to London time.

     (D)  References to assets are to present and future assets and include
          revenues.

     (E)  References to "(Pounds)", to "POUNDS" and to "STERLING" are to UK
          pounds sterling.

     (F)  References to fees or expenses include any value added tax on those
          fees or expenses.

     (G)  References to statutes and statutory instruments are to those statutes
          and statutory instruments as amended and in force from time to time.

     (H)  References to any document in "AGREED FORM" are to that document in
          the form agreed between the parties, as evidenced by the form of that
          document being initialled for the purpose of identification by Norton
          Rose and Slaughter and May.

     (I)  References to a "FINANCIAL YEAR" of the Borrower are references to a
          year starting on 1st January and ending on 31st December. This applies
          even where the Borrower's statutory accounting reference date is a
          date other than 31st December.

     (J)  References to:

          (i)    "THIS AGREEMENT" are references to the Loan Agreement dated
                 28th February, 1997 between the Borrower, the Parent, the
                 Lenders, the Agent and others as amended by the amendment
                 agreements dated 21st May, 1997 and 18th June, 1999 and as
                 supplemented by the additional guarantor agreement dated with
                 effect from 27th October, 1998 under which Millennium acceded
                 as a party to this Agreement.
<PAGE>

                 However, the reference to "this Agreement" in Clause 2.2(A) is
                 to the Loan Agreement referred to above before the Amendment
                 Date.

          (ii)   the "AMENDMENT DATE" are references to the date on which the
                 second amendment to this Agreement becomes effective, which is
                 expected to be 18th June, 1999.

1.3  HEADINGS

     All headings and titles are inserted for convenience only.  They are to be
     ignored in the interpretation of this Agreement.

1.4  CALCULATIONS

     Interest and commitment fee will be calculated using the following formula:

                                I= D/Y x R x A
     where:

          I =  interest or commitment fee accrued

          D =  number of days in the period for which the interest or commitment
               fee is to be calculated, including the first day but excluding
               the last day

          R =  the rate of interest or commitment fee, expressed as a fraction

          A =  the amount on which interest or commitment fee is being
               calculated

          Y =  365 or, in the case of an amount in euro, 360.

     Interest and commitment fee will be treated as accruing uniformly over each
     period on a daily basis.

     In some cases "R" or "A" may change during a period for which interest and
     commitment fee is to be calculated.  In this case the interest and
     commitment fee will be calculated for successive periods and then
     aggregated.  These successive periods will be the periods during which "R"
     and "A" were constant.

1.5  REIMBURSEMENTS

     If a party wishes to claim reimbursement of any amount to which it is
     entitled it will deliver a demand to the reimbursing party.  This will set
     out the losses, expenses or other amounts to be reimbursed.  It must also
     specify the currency of reimbursement.  The reimbursing party agrees to pay
     those amounts to the party entitled to them no later than two Business Days
     after the delivery of the demand to the reimbursing party. Where there is
     an outstanding Termination Event, payment will be due instead on delivery
     of this demand.

1.6  IMPACT OF THE INTRODUCTION AND OPERATION OF THE EURO

     Market practice relating to the inter-bank deposit market, the method and
     timing of rate fixing and the calculation of interest may change during the
     Third Stage.  As a result, it may differ from the method of rate fixing and
     the calculation of interest prescribed under the terms of this Agreement
     and may also change in relation to drawings in sterling if it is
     substituted by the euro after the Amendment Date.   In this event, the
     Agent may notify the Borrower and the Lenders of the amendments to this
     Agreement which are required
<PAGE>

     or reasonably desirable to reflect and conform to these changes. The
     amendments may provide for the use of London inter-bank market offered
     rates or inter-bank market offered rates from a wider European market (or,
     in either case, screen rates reflecting these offered rates). They may also
     change, amongst other things, the rate fixing time, the definition of
     "Business Day" and "Rate Fixing Date" and any elements of the formula set
     out in Clause 1.4. The amendments set out in the Agent's notice will take
     effect on the later of the date specified in the notice, the date not less
     than 10 Business Days after the date of that notice and (in the case of
     such changes being made due to a country becoming a participating member
     state after the Amendment Date) the date on which that participation
     commences. The amendments will not apply to interest which is computed by
     reference to any period starting before the date the amendments take
     effect. This clause may, in appropriate circumstances, be invoked more than
     once.
<PAGE>

                           PART II :  THE FACILITIES

2.   THE FACILITIES

2.1  AMOUNT AND NATURE
     The Facilities comprise:

     (A)  A seven-year (Pounds)100,000,000 revolving loan facility with a euro
          option which converts into a term loan facility on the Conversion Date
          under which advances may (subject to the terms and conditions of this
          Agreement) be made by the Lenders to the Borrower.

     (B)  A seven-year (Pounds)50,000,000 revolving loan facility with a euro
          option under which advances may (subject to the terms and conditions
          of this Agreement) be made by the Lenders to the Borrower.

2.2  PURPOSE

     The Borrower agrees to use the proceeds of all Advances to:

     (A)  refinance existing Indebtedness for Borrowed Money;

     (B)  finance its working capital, capital expenditure and other related
          costs in developing the infrastructure for its DTT transmission
          network (including for the purposes of acquiring "DTT Equipment" and
          making "Tower Acquisitions", both terms as defined in the Bonds); and

     (C)  finance its working capital and for its other general corporate
          purposes, including for the purpose of making Further Acquisitions
          permitted under Clause 20.1(L).

     Without prejudice to the obligations of the Borrower under this sub-clause
     2.2, neither the Agent nor the Lenders nor any of them shall be obliged to
     concern themselves with the application of amounts to be used or raised by
     the Borrower under this Agreement.

2.3  AVAILABILITY AFTER THE AMENDMENT DATE

     The Borrower may borrow under the Facilities (in their amended form as set
     out in this Agreement) on or after the Amendment Date after the Agent has
     received all the items listed in Schedule 3 in a form satisfactory to the
     Agent or, where the form has been agreed prior to the signing of this
     Agreement, in the agreed form.

2.4  EXPIRY OF AVAILABILITY

     (A)  The Borrower may not borrow under Facility A after the Facility A
          Commitment Availability Termination Date.

     (B)  The Borrower may not borrow under Facility B after the date falling
          one month before the Facility Termination Date.

2.5  SECURITY

     All amounts owing under this Agreement will be secured by the Charges.
<PAGE>

3.   THE LENDERS AND THE BORROWER

3.1  RIGHTS AND OBLIGATIONS

     The rights and obligations of each Lender under the Financing Documents are
     separate and independent from the rights and obligations of each other
     Lender. A Lender may take proceedings against the Borrower or a Guarantor
     on its own without joining any other Lender to those proceedings.

3.2  FAILURE TO PERFORM

     If a Lender fails to perform its obligations the Borrower and the
     Guarantors will have rights solely against that Lender.  The obligations of
     the Borrower and the Guarantors to the Agent, the Arrangers and the other
     Lenders will not be affected by this failure.

3.3  PARTICIPATIONS

     The participation of a Lender in an Advance will be calculated using the
     following formula:

                                  P = C/F x A
     where:

          P = the participation of that Lender in the Advance

          C = the Available Commitment of that Lender on the Advance Date for
              that Advance

          F = the aggregate Available Commitments of all the Lenders on that
              Advance Date

          A = the amount of the Advance.

     References above to Available Commitments are to:

     (A)  Available Facility A Commitments in the case of an Advance under
          Facility A; and

     (B)  Available Facility B Commitments in the case of an Advance under
          Facility B.

     The Agent may round participations upwards or downwards to the nearest unit
     of currency.

 4.  FEES AND EXPENSES

4.1  FRONT-END FEE

     The Borrower agrees to pay a front-end fee to the Arrangers.  The amount of
     this fee, the timing of payment and the payees are described in a letter
     from Credit Suisse First Boston to the Borrower dated 28th April, 1999.
     This fee may be shared amongst the Arrangers and Lenders in accordance with
     the agreement between the Arrangers and each Lender (but that agreement
     shall be of no concern to the Borrower, who shall obtain a good discharge
     by making payment in accordance with the above-mentioned letter).
<PAGE>

4.2  AGENCY FEE

     The Borrower agrees to pay an agency fee to the Agent. The amount of this
     fee and the timing of payment are described in a letter from the Agent to
     the Borrower dated 28th April, 1999.

4.3  COMMITMENT FEE

     A commitment fee will accrue on the aggregate of the Available Facility A
     Commitments and the Available Facility B Commitments of each Lender.  This
     fee will accrue from the Amendment Date until:

     (A)  in the case of Available Facility A Commitment, the Facility A
          Commitment Availability Termination Date; and

     (B)  in the case of Available Facility B Commitment, the date falling one
          month before the Facility Termination Date.

     The Borrower agrees to pay the fee to each Lender in arrears at three-
     monthly intervals and on the Facility Termination Date.

     The rate of the fee applicable to each three-monthly period or shorter
     period ending on the Facility Termination Date will be:

     (A)  in the case of the Available Facility A Commitment, half the
          Applicable Margin which would apply on the first day of the relevant
          period if an amount was advanced under Facility A on that date; and

     (B)  in the case of the Available Facility B Commitment, half the
          Applicable Margin which would apply if an amount was advanced under
          Facility B on that date.

4.4  REIMBURSEMENT OF INITIAL EXPENSES

     The Arrangers and the Agent have incurred and will incur expenses in
     connection with the arrangement of the Facilities.  The Borrower agrees to
     reimburse each of the Arrangers and the Agent for the amount of these
     expenses.  They include the legal fees incurred in the negotiation,
     preparation and signature of the Financing Documents. They also include
     expenses incurred (after as well as before the Amendment Date) in
     perfecting any security constituted by the Charges and as part of the
     syndication process of the amended Facilities arranged by the Arrangers.

4.5  DOCUMENTARY TAXES

     This sub-clause applies if any registration fee, stamp duty or other
     documentary tax is required to be paid on or in connection with a Financing
     Document, any document referred to in or contemplated by a Financing
     Document or any judgment obtained in connection with a Financing Document.
     It also applies if a fee, duty or tax is payable in order for any of these
     documents to be valid, binding and enforceable, for the Security under the
     Charges to be perfected or for the Financing Documents to be admitted as
     evidence in court.  In these circumstances the Borrower agrees to pay the
     fee, duty or tax together with any interest or penalty for late payment.
     Alternatively, the Agent or a Lender may make the payment.  If it does so,
     the Borrower agrees to reimburse the Agent or that Lender for the amount
     paid and the losses and expenses incurred as a result of the payment.
<PAGE>

4.6  PROTECTION OF RIGHTS

     An Arranger, the Agent or a Lender may incur expenses in protecting,
     preserving or (if any Company is in breach of its obligations under the
     Financing Documents) enforcing its rights under the Financing Documents.
     The Borrower agrees to reimburse that Arranger, the Agent or that Lender
     for the amount of these expenses.

4.7  EXPENSES RELATING TO AMENDMENTS

     The Borrower agrees to reimburse the Agent for the expenses that it or any
     of the Lenders incurs as a result of:

     (A)  any request made by the Borrower to waive or amend a term of the
          Financing Documents; or

     (B)  any amendments to the Financing Documents made as a result of the
          introduction or operation of the euro, including pursuant to Clause
          1.6 and Clause 6.2(E).

4.8  FSA AND ECB FEES

     (A)  REIMBURSEMENT: This sub-clause applies if, whether now or in the
          future, either:

          (i)   a requirement to pay fees is imposed by the Financial Services
                Authority under the Fees Regulations; or

          (ii)  a reserve requirement is imposed by the European Central Bank,

          which, in either case, is applied to any Lender (and would be applied
          generally to banks or financial institutions of a similar nature to
          that Lender) as a consequence of its Commitments, participation in
          the Facilities or the arrangements made by it in funding its
          participation in the Facilities.  If, as a result, that Lender's
          effective return on its overall capital is reduced, the Borrower
          agrees to reimburse that Lender for the amount claimed.

     (B)  NOTIFICATION PERIOD: In the event that paragraph (A) applies, each
          Lender may submit a certificate setting out a calculation of the
          amount claimed by it to the Agent within the period (the
          "CERTIFICATION PERIOD") of 10 Business Days after the end of each
          Relevant Period. The Agent will notify the Borrower of the amount
          claimed by that Lender within five Business Days after the end of the
          relevant Certification Period.  The Borrower agrees to reimburse that
          Lender as provided in Clause 1.5.

     (C)  RELEVANT PERIOD: In this sub-clause a "RELEVANT PERIOD" is, as
          appropriate:

          (i)   the period beginning on the Amendment Date and ending on 31st
                December, 1999; or

          (ii)  each subsequent period of six months starting on the previous
                day of preceding period and ending on 30th June or, as the case
                may be, 31st December; and

          (iii) the period shorter than six months which starts on 30th June or
                31st December in a year and ends on the Facility Termination
                Date.

     (D)  FEES REGULATIONS: In this sub-clause "Fees Regulations" means, as
          appropriate, either:

          (i)   the Banking Supervision (Fees) Regulations 1999; or
<PAGE>

          (ii)  such regulations as from time to time may be in force, relating
                to the payment of fees for banking supervision in respect of
                periods subsequent to 31st March, 2000.

5.   CANCELLATION

5.1  VOLUNTARY CANCELLATION

     The Borrower may cancel the whole or part of the Total Facility A
     Commitments or the whole or part of the Total Facility B Commitments by
     giving notice to the Agent.  This notice will take effect five Business
     Days after it is received by the Agent unless a later date is specified in
     the notice.  In that case the notice will take effect on the specified
     date.  A cancellation of anything less than the full amount of the
     Facilities will, however, only take effect if the conditions in Clause 5.2
     are satisfied.  The Borrower may only cancel a part of the Total Facility A
     Commitments or a part of the Total Facility B Commitments which, in either
     case, is a minimum amount of (Pounds)5,000,000 and an integral multiple of
     (Pounds)1,000,000.

5.2  CONDITIONS PRECEDENT TO VOLUNTARY CANCELLATION
     A voluntary cancellation of anything less than the full amount of the
     Facilities under Clause 5.1 will only be effective if both the following
     are true:

     (A)  The Agent has received a certificate signed by the Certifying
          Financial Officer or a director of the Borrower. The certificate must
          relate to the proposed cancellation. It must state that, after the
          cancellation takes effect, the Borrower will have sufficient sources
          of liquidity in existence to meet its ongoing working capital and
          general corporate requirements. The certificate must be received by
          the Agent no later than the time it receives the notice of
          cancellation.

     (B)  Reasonable evidence of the sources of liquidity referred to in
          paragraph (A) has been delivered to the Agent before the cancellation
          is due to take effect. This is only required if Lenders comprising an
          Instructing Group request the Agent to demand this evidence. These
          requests must be received by the Agent by no later than 5.00 p.m. on
          the third Business Day before the date the proposed cancellation would
          otherwise take effect.

5.3  MANDATORY CANCELLATION ON DISPOSALS

     (A)  OBLIGATION TO CANCEL: The Borrower agrees to cancel all or part of the
          Total Facility A Commitments and the Total Facility B Commitments in
          accordance with this sub-clause.

     (B)  CIRCUMSTANCES IN WHICH OBLIGATION TO CANCEL ARISES: The Borrower will
          be obliged to make a cancellation under this sub-clause following the
          disposal of any of the assets of the Borrower or any of its Restricted
          Subsidiaries (a "DISPOSAL EVENT"). This does not apply to the
          following disposals:

          (i)   A disposal of obsolete assets.

          (ii)  Disposals on arm's length terms where the aggregate fair market
                value of the assets disposed of in any financial year of the
                Borrower is no more than (Pounds)1,000,000.

          (iii) A disposal between the Borrower and any Restricted Subsidiary
                (which is a wholly-owned member of the Borrower's Restricted
                Group) or
<PAGE>

                between Restricted Subsidiaries (each of which is a wholly-owned
                member of the Borrower's Restricted Group).

          (iv)  Disposals for non-cash consideration. This exception will only
                apply to the extent of a maximum amount in Net Disposal Proceeds
                of (Pounds)2,500,000 during the period from the Amendment Date
                until the Facility Termination Date.

          (v)   Disposals where the asset which is the subject of the disposal
                is being replaced to the extent that the Net Disposal Proceeds
                are applied to acquire the replacement asset within the period 6
                months before or after the disposal.

          (vi)  A disposal by a Restricted Subsidiary where each of the
                following is true:

                (a) the Restricted Subsidiary is prevented by applicable law
                    from making an amount equal to the Net Disposal Proceeds
                    available to the Borrower for it to make any payment
                    resulting from a Disposal Event,

                (b) the Borrower and that Restricted Subsidiary have used all
                    reasonable endeavours to enable an amount equal to the Net
                    Disposal Proceeds to be made available to the Borrower so
                    that any payment resulting from the Disposal Event can be
                    made, and

                (c) the Borrower or that Restricted Subsidiary pays an amount
                    equal to the Net Disposal Proceeds into a blocked interest-
                    bearing account held with the Agent or a nominee of the
                    Agent and charged to the Agent as trustee or agent (or both)
                    for the Lenders under a document expressed to be a Charge.

     (C)  AMOUNT OF MANDATORY CANCELLATION: The amount of the Total Facility A
          Commitments and the Total Facility B Commitments which will be
          cancelled under this sub-clause will be an amount equal to the Net
          Disposal Proceeds which will be applied first to cancel the Total
          Facility A Commitments and thereafter to cancel the Total Facility B
          Commitments.

     (D)  TIMING OF MANDATORY CANCELLATION: The amount of the Total Facility A
          Commitments and/or the Total Facility B Commitments due to be
          cancelled under this sub-clause will be cancelled on the date two
          Business Days after receipt by a member of the Borrower's Restricted
          Group of the proceeds of the disposal.

          Where the disposal proceeds are received as deferred cash
          consideration, the due date for cancellation will be deferred until
          the date two Business Days after the Borrower or any of its Restricted
          Subsidiaries realises cash from those proceeds.

          Where the disposal proceeds are applied towards the cost of a
          replacement asset as described in Clause 5.3(B)(v) and in paragraph
          (D) of the definition of "NET DISPOSAL PROCEEDS" in Clause 1.1, the
          due date for cancellation will be deferred (by no more than 6 months)
          until the date two Business Days after the replacement asset is
          acquired (if this occurs after receipt by a member of the Borrower's
          Restricted Group of the Net Disposal Proceeds).
<PAGE>

     (E)  INSUFFICIENT UNDRAWN COMMITMENTS: Clause 10.2 applies to the extent
          that the amount of the cancellation exceeds the Available Facility A
          Commitment or the Available Facility B Commitment, as the case may be.

     (F)  SUSPENSION OF MANDATORY CANCELLATION OBLIGATION: The requirement to
          make a cancellation under this sub-clause will, however, no longer
          apply after the date on which annualised Debt Coverage (computed in
          accordance with Clause 8.8(B)) is below 3:1 for two successive
          Quarters and for so long as:

          (i)   the annualised Debt Coverage remains at no more than 3:1; and

          (ii)  the Certifying Financial Officer confirms in writing in a
                certificate delivered to the Agent under Clause 18.1(r), at the
                same time as the delivery of each set of monthly management
                accounts under Clause 18.1(e), that, to the best of his
                knowledge, having made all reasonable enquiries, and without
                personal liability, the Disposal Events which are proposed to
                take place in the month following that to which the monthly
                management accounts delivered relate will not result in the
                Borrower failing to maintain annualised Debt Coverage at below
                3:1 at any time during the next four full Quarters following the
                date on which the last of proposed Disposal Events specified in
                the certificate is due to take place.

5.4  MANDATORY CANCELLATION OF FACILITIES ON FLOTATION
     The Facilities will be cancelled automatically upon the occurrence of the
     circumstances giving rise to an obligation to prepay the Loan as described
     in Clause 10.4.

5.5  NO REBORROWING AFTER CANCELLATION

     The Borrower may not borrow any part of the Total Facility A Commitments or
     the Total Facility B Commitments which has been cancelled or which is the
     subject of a notice of voluntary cancellation.

5.6  EFFECT OF CANCELLATION

     When any cancellation takes effect:

     (A)  In relation to Facility A, the Facility A Commitments of the Lenders
          will be reduced by an aggregate amount equal to the reduction of the
          Total Facility A Commitments. Each Lender's Facility A Commitment will
          be reduced in the same proportion.

     (B)  In relation to Facility B, the Facility B Commitments of the Lenders
          will be reduced by an aggregate amount equal to the reduction of the
          Total Facility B Commitments. Each Lender's Facility B Commitment will
          be reduced in the same proportion.

     This does not apply to a cancellation under Clause 11.1(B), Clause 11.2(D)
     or Clause 11.4(E).  Those Clauses set out the manner in which cancellation
     under their terms takes effect.
<PAGE>

                              PART III : THE LOAN

6.   ADVANCE OF FUNDS

6.1  NOTICE TO THE AGENT
     When the Borrower wishes to borrow under a Facility it will deliver a
     notice to the Agent.  This notice must be substantially in the form of
     Schedule 5. The notice must specify:

     (A)  the Facility under which the borrowing is to be made;

     (B)  the amount to be borrowed;

     (C)  the currency of the borrowing;

     (D)  the length of the Interest Period; and

     (E)  the date of the borrowing. This date must be no sooner than

          (i)   in relation to Advances in sterling, the first Business Day
                after the date the Agent receives the notice; or

          (ii)  in relation to Advances in the Optional Currency, the third
                Business Day after the date the Agent receives the notice.

     For these purposes if the Agent receives the notice on a day which is not a
     Business Day or after 10.00 a.m. on a Business Day, it will be treated as
     having received the notice on the following Business Day.  This does not
     apply to an Advance to be made on the Amendment Date so long as this
     Advance is made in sterling and that the notice is received by 8.00 a.m. on
     the Amendment Date.

6.2  LIMITATIONS ON ADVANCES

     The following limitations apply to Advances:

     (A)  FACILITY A ADVANCES: In the case of Facility A Advances:

          (i)   No Facility A Advance may exceed the Available Facility A
                Commitments of all the Lenders. This limitation will be applied
                as at the Advance Date. For this purpose, before the Conversion
                Date:

                (a) any part of the Total Facility A Commitments which is
                    subject to a notice of voluntary cancellation will be
                    treated as cancelled;

                (b) the amount of any Facility A Advance due to be repaid on the
                    Advance Date will be treated as having been repaid;

                (c) any other Facility A Advance due to be made on the Advance
                    Date will be treated as having been made; and

                (d) Facility A Advances in the Optional Currency will be taken
                    into account at their Original Sterling Amount.

          (ii)  Each Facility A Advance must be a minimum of (Pounds)5,000,000
                and an integral multiple of (Pounds)1,000,000 or be the
                aggregate of the Available
<PAGE>

                Facility A Commitments. A Facility A Advance in the Optional
                Currency must be either:

            (a) a minimum of the Equivalent Amount of (Pounds)5,000,000 and an
                integral multiple of the Equivalent Amount of (Pounds)1,000,000;
                or

            (b) the Equivalent Amount of the uncancelled and undrawn amount of
                Facility A.

          (iii) The Advance Date of any Facility A Advance must be a Business
                Day on or after the Amendment Date and before the Facility A
                Commitment Availability Termination Date.

          (iv)  The Interest Period of each Facility A Advance must comply with
                Clause 8.

          (v)   Clause 6.2(C) applies.

          (vi)  If the Facility A Advance is not to be in sterling, Clause 7
                applies.

     (B)  FACILITY B ADVANCES: In the case of Facility B Advances:

          (i)   No Facility B Advance may exceed the amount of the aggregate of
                the Available Facility B Commitments of all the Lenders. This
                limitation will be applied as at the Advance Date. For this
                purpose:

                (a) any part of the Total Facility B Commitments which is
                    subject to a notice of voluntary cancellation will be
                    treated as cancelled;

                (b) the amount of any Facility B Advance due to be repaid on the
                    Advance Date will be treated as having been repaid;

                (c) any other Facility B Advance due to be made on the Advance
                    Date will be treated as having been made; and

                (d) Facility B Advances in the Optional Currency will be taken
                    into account at their Original Sterling Amount.

          (ii)  A Facility B Advance must be a minimum of (Pounds)5,000,000 and
                an integral multiple of (Pounds)1,000,000 or be the aggregate of
                the Available Facility B Facility Commitments of all the
                Lenders. A Facility B Advance in the Optional Currency must be
                either:

                (a) a minimum of the Equivalent Amount of (Pounds)5,000,000 and
                    an integral multiple of the Equivalent Amount of
                    (Pounds)1,000,000; or

                (b) the Equivalent Amount of the uncancelled and undrawn amount
                    of Facility B.

          (iii) The Advance Date of a Facility B Advance must be a Business Day
                on or after the Amendment Date and at least one month before the
                Facility Termination Date.

          (iv)  The Interest Period of each Facility B Advance must comply with
                Clause 8.

          (v)   Clause 6.2(C) applies.

          (vi)  If the Facility B Advance is not to be in sterling, Clause 7
                applies.
<PAGE>

     (C)  FACILITY A ADVANCES AND FACILITY B ADVANCES: There must be no more
          than ten Advances outstanding at any one time. For this purpose, as at
          any Advance Date:

          (i)   any Facility B Advance due to be repaid on any Advance Date will
                be treated as having been repaid on that Advance Date;

          (ii)  any Facility A Advance due to be repaid on any Advance Date
                before the Conversion Date will be treated as having been repaid
                on that Advance Date; and

          (iii) any other Facility A Advance or Facility B Advance due to be
                made on the Advance Date will be treated as having been made.

          There must be no more than three Converted Facility A Advances
          outstanding after the Conversion Date.

     (D)  EURO UNITS: Each Advance in euro will be recorded as denominated in
          euro units. This does not affect the denomination of any payment
          relating to that Advance (subject to Clause 12.3).

     (E)  SUBSTITUTION OF ALTERNATIVE MINIMUM AND MULTIPLE AMOUNTS

          This paragraph applies if the United Kingdom becomes a participating
          member state and adopts the euro as its currency.  In this case, the
          Agent may determine round amounts in euro to be substituted for
          amounts in sterling to which reference is made in this Agreement.  The
          substituted amounts need not be a direct equivalent of the sterling
          amounts.  In this case, the Agent agrees to notify each substituted
          amount to the Borrower and the Lenders.  Upon this notification, this
          Agreement will be deemed amended accordingly. The substituted amounts
          will take effect on the later of the date specified in the notice, the
          date not less than 10 Business Days after the date of that notice and
          the date on which the United Kingdom so becomes a participating member
          state.  The substituted amounts will apply to Advances made on or
          after that effective date.

6.3  NOTICE TO THE LENDERS

     The Agent agrees to provide promptly details of each notice of borrowing to
     each Lender.  These details will also include the amount of the Lender's
     participation in the Advance.

6.4  CONDITIONS TO BORROWING

     The Lenders will only be obliged to make an Advance to the Borrower if:

     (A)  the Facility is available in accordance with Clause 2;

     (B)  a properly completed and signed notice of borrowing has been received
          by the Agent;

     (C)  the representations in Clause 17.1 (other than, in the case of any
          Advance after the first Advance made on or after the Amendment Date,
          paragraphs (T) and (U) of Clause 17.1) are true on the Advance Date;
          and

     (D)  there is no outstanding Termination Event or Potential Termination
          Event on the Advance Date,
<PAGE>

     but so that Clause 6.4(D) shall not prevent the rollover of an existing
     Advance (without increasing the amount of this Advance) for an Interest
     Period of no more than one month at any time when no Termination Event has
     occurred and is continuing.

6.5  OBLIGATION TO ADVANCE FUNDS

     If the requirements of this Clause are satisfied each Lender agrees to
     advance its participation in the Advance to the Borrower.  The Advance will
     be made on the date specified in the notice of borrowing.

6.6  CONSEQUENCES OF THE ADVANCE NOT BEING MADE

     If the notice of borrowing is delivered but no Advance is made the Lenders
     may incur losses and expenses as a result.  The losses and expenses may
     include those incurred in liquidating or otherwise utilising amounts
     borrowed by the Lenders to fund the Advance.  They may also include the
     losses and expenses incurred in terminating commitments relating to the
     funding or incurred in hedging open positions resulting from the Advance
     not being made.  The Borrower agrees to reimburse each Lender for the
     amount of these losses and expenses.  This sub-clause does not apply if the
     Advance is not made by reason of a default of a Lender.

7.   CURRENCY OPTION

7.1  REQUEST FOR OPTIONAL CURRENCY

     This Clause applies if a notice of borrowing specifies the Optional
     Currency.  In this case the Advance requested will be made if the Advance
     is required to be made under the terms of this Agreement.

7.2  NON-AVAILABILITY OF OPTIONAL CURRENCY

     A Lender (an "AFFECTED LENDER") may notify the Agent that it is unable to
     make its participation in an Advance available in the Optional Currency for
     the requested Interest Period.  If a Lender makes this notification it will
     set out brief details of the reasons why it is unable to make its
     participation available in this notice.  Each of the following applies if
     this notice is received by the Agent by 2.00 p.m. on the third Business Day
     before the day the Advance is due to be made:

     (A)  The Affected Lender will not be obliged to make its participation in
          the Advance available in the Optional Currency. Instead the Affected
          Lender agrees to make the participation available in sterling.

     (B)  The amount the Affected Lender is required to advance will be the
          Original Sterling Amount of the participation it would otherwise have
          been required to make available in the Optional Currency.

     (C)  The Agent agrees to notify the Borrower and the other Lenders of the
          receipt of the notice from the Affected Lender. This notification will
          be made by 5.00 p.m. on the third Business Day before the day the
          Advance is due to be made.

7.3  IMPRACTICALITY OF DRAWING IN OPTIONAL CURRENCY

     An Advance which was to have been made in the Optional Currency will not be
     required to be made if all the following are true:
<PAGE>

     (A)  An event described in Clause 7.4 occurs.

     (B)  The Agent notifies the Borrower of this event and states that, as a
          result, the Advance cannot be made in the Optional Currency.

     (C)  The notice from the Agent is received by the Borrower by 9.00 a.m. on
          the date the Advance is due to be made.

     The Agent agrees to deliver a notice under this sub-clause if it is
     instructed by an Instructing Group to do so.  If the Agent makes this
     notification it will set out brief details of any reasons provided to it by
     the Instructing Group when instructing the Agent to give this notice.  For
     the purposes of this sub-clause an Advance will be treated as being made in
     the Optional Currency even if part of it was due to be made in sterling by
     virtue of Clause 7.2.

7.4  EVENTS MAKING DRAWING IN OPTIONAL CURRENCY IMPRACTICAL

     An event referred to in Clause 7.3 occurs if both:

     (A)  there are changes in national or international financial, political or
          economic conditions or in currency exchange rates or exchange
          controls; and

     (B)  these changes would, in the opinion of the Agent, make it
          impracticable for the Advance to be denominated in the Optional
          Currency.

8.   INTEREST

8.1  INTEREST PERIODS

     (A)  FACILITY A AND FACILITY B ADVANCES: Each Facility A Advance made
          before the Conversion Date and each Facility B Advance will have one
          Interest Period only.

     (B)  POST CONVERSION DATE FACILITY A ADVANCES: Interest shall be calculated
          on each Converted Facility A Advance by reference to successive
          Interest Periods. The first Interest Period will, unless Clause 9.2
          applies, commence on the date on which the Facility A Advance to which
          it relates was made and will end on the date selected or determined
          under Clause 8.3. Each subsequent Interest Period will commence on the
          last day of the preceding Interest Period of this Converted Facility A
          Advance. A Converted Facility A Advance may be split into up to three
          Converted Facility A Advances in the same currency as the Converted
          Facility A Advance or consolidated back into a single Converted
          Facility A Advance if the Converted Facility A Advances to be
          consolidated are all in the same currency and the resultant
          consolidated Facility A Advance is also in this currency. A splitting
          or consolidation must take effect on the first day of an Interest
          Period for all Converted Facility A Advances affected. No split can be
          made unless, after that splitting:

          (i)   no more than three Converted Facility A Advances in total will
                be outstanding; and

          (ii)  the amount of each Converted Facility A Advance is
                (Pounds)20,000,000 (or the Equivalent Amount in the Optional
                Currency) or more.
<PAGE>

8.2  DURATION OF INTEREST PERIODS

     Each Interest Period must be a period of 1, 2, 3 or 6 months or any other
     period not exceeding 12 months which the Agent (acting on the instructions
     of all the Lenders) and the Borrower may agree in writing.

8.3  SELECTION OF INTEREST PERIODS

     (A)  FACILITY A ADVANCES: The Borrower may select an Interest Period for a
          Facility A Advance made before the Conversion Date in its notice of
          borrowing. After the Conversion Date the Borrower must notify the
          Agent of the duration of each Interest Period by no later than 10.00
          a.m. on the third Business Day before the last day of each previous
          Interest Period.

     (B)  FACILITY B ADVANCES: The Borrower may select an Interest Period for
          each Facility B Advance in its notice of borrowing.

     (C)  FAILURE TO SELECT: When the Borrower does not select an Interest
          Period in accordance with paragraph (B) or paragraph (A), the Interest
          Period will be three months or such other period as will comply with
          Clause 8.4.

8.4  ADJUSTMENT OF INTEREST PERIOD

     (A)  An Interest Period will end on the last Business Day of a calendar
          month if it is for a number of complete months and either:

          (i)   it commenced on the last Business Day of a calendar month; or

          (ii)  it commenced on a day for which there is no corresponding day in
                the month in which it is due to end.

     (B)  This paragraph applies when an Interest Period for a Converted
          Facility A Advance would otherwise begin before but end after a
          Facility A Repayment Date. In this case that Interest Period will end
          on that Facility A Repayment Date. This paragraph will not apply,
          however, in the case of a Converted Facility A Advance where there are
          other Converted Facility A Advances with Interest Periods ending on
          that Facility A Repayment Date which, in aggregate, equal or exceed
          the amount due to be repaid on that Facility A Repayment Date.

     (C)  Any Interest Period which would otherwise begin before but end after
          the Facility Termination Date will, unless paragraph (D) applies, end
          on the Facility Termination Date.

     (D)  Any Interest Period which would otherwise end on a day which is not a
          Business Day will be extended to the next Business Day, unless that
          day is in another calendar month. Where it is in another calendar
          month the Interest Period will end on the preceding Business Day.

8.5  RATE OF INTEREST

     The rate of interest applicable during an Interest Period will be:

     (A)  in respect of an Advance in sterling, a rate per annum equal to LIBOR
          for that Advance for that Interest Period plus the Applicable Margin
          plus the Costs Rate; and
<PAGE>

     (B)  in respect of an Advance in euros, a rate per annum equal to EURIBOR
          for that Advance for that Interest Period plus the Applicable Margin..

8.6  PAYMENT OF INTEREST

     (A)  The Borrower agrees to pay interest accrued on the outstanding amount
          of each Advance in arrear on the last day of each Interest Period in
          respect of that Advance. Where an Interest Period is longer than 6
          months the Borrower also agrees to pay interest on the day 6 months
          after the start of that Interest Period.

     (B)  The Borrower may give notice to the Agent that it wishes to pay all
          accrued interest on the Loan on the last Business Day of its financial
          year. This notice must be received by the Agent no later than five
          Business Days before that day. In this case the Borrower agrees to pay
          that amount of interest on that date. Any amount received by the Agent
          will be paid to the Lenders. Payments which would otherwise have been
          due under paragraph (A) will be adjusted accordingly.

8.7  NOTIFICATION OF INTEREST RATE

     The Agent agrees to notify the Borrower and the Lenders promptly of the
     determination of a rate of interest under this Agreement.

8.8  MARGIN ON ADVANCES

     (A)  COMPUTATION OF MARGIN: The Applicable Margin will be computed in
          accordance with this sub-clause.

     (B)  ANNUALISED DEBT COVERAGE: The Agent agrees to compute the annualised
          Debt Coverage as at the end of each Quarter. For this purpose it will
          use the figures for Financial Indebtedness and EBITDA contained in the
          certificate of the Certifying Financial Officer delivered pursuant to
          Clause 18.1(g). In order to work out the annualised Debt Coverage the
          Agent will use the following formula:

          ADC = the ratio of FI: (EBITDA x 4)

          where:

          ADC = annualised Debt Coverage

          EBITDA = EBITDA for the most recent Quarter

          FI = Financial Indebtedness as at the end of the most recent Quarter.

     (C)  INITIAL APPLICABLE MARGIN: Unless paragraph (F) applies, the
          Applicable Margin will be 1.35% for the first six months after the
          Amendment Date (the "INITIAL MARGIN PERIOD"). However, the Applicable
          Margin during the Initial Margin Period will be 1.50%:

          (i)   if the certificate of the Certifying Financial Officer delivered
                under paragraph 18 of Schedule 3; or

          (ii)  if, and with effect from the date on which, a certificate of the
                Certifying Financial Officer delivered pursuant to Clause
                18.1(g) during the Initial Margin Period,
<PAGE>

          results in the Agent computing annualised Debt Coverage calculated in
          accordance with paragraph (B) of greater than or equal to 5:1.

     (D)  AMOUNT OF THE APPLICABLE MARGIN: The Applicable Margin computed for
          the purposes of this sub-clause for:

          (i)   Interest Periods which are current at the end of the Initial
                Margin Period shall be determined by the Agent with effect from
                the first day after the end of the Initial Margin Period; and

          (ii)  Interest Periods starting after the end of the Initial Margin
                Period shall be determined by the Agent with effect from the
                first day of that Interest Period

          in each case, in accordance with the most recent certificate delivered
          by the Certifying Financial Officer and on the basis of the following
          table:

                        (1)                                (2)
              ANNUALISED DEBT COVERAGE                    MARGIN
          Greater than or equal to 5:1                     1.50%

          Less than 5:1 and greater than
          or equal to 4.5:1                                1.35%

          Less than 4.5:1 and greater
          than or equal to 4:1                             1.15%

          Less than 4:1 and greater than
          or equal to 3:1                                  1.00%

          Less than 3:1 and greater than
          or equal to 2:1                                  0.80%

          Less than 2:1                                    0.625%

          The Agent will determine the margin in column (2) of the table in
          respect of the annualised Debt Coverage (computed in accordance with
          paragraph (B)) as at the end of the most recent Quarter.  The margin
          so determined will, however, not apply if paragraph (F) applies.

     (E)  APPLICABLE MARGIN: The adjustment of the Applicable Margin to reflect
          a change in annualised Debt Coverage as a result of the delivery to
          the Agent of the certificate of the Certifying Financial Officer
          pursuant to Clause 18.1(g) will take effect after that delivery as
          follows:

          (i)   in relation to each Facility A Advance on or before the
                Conversion Date, from the first day of each Facility A Advance
                after delivery of the certificate;

          (ii)  in relation to each Converted Facility A Advance, from the first
                day of the next Interest Period applicable to that Converted
                Facility A Advance; or

          (iii) in relation to each Facility B Advance, from the first day of
                each Facility B Advance after delivery of the certificate.

     (F)  TERMINATION EVENT OR POTENTIAL TERMINATION EVENT: The Applicable
          Margin will be 1.50% in the event that any of the following occur:
<PAGE>

          (i)   a Termination Event;

          (ii)  a Potential Termination Event under Clause 21.1(A); or

          (iii) the failure to deliver the certificate pursuant to Clause
                18.1(g) by the latest date prescribed.

          This adjustment will take effect immediately upon the date of the
          occurrence any of the events set out in sub-paragraphs (i), (ii) or
          (iii) (as determined by the Agent) and will last for so long (only) as
          the relevant event subsists unremedied or unwaived.

9.   REPAYMENT

9.1  REPAYMENT OF FACILITY A ADVANCES BEFORE THE CONVERSION DATE

     (A)  The Borrower agrees to repay each Facility A Advance made to it before
          the Conversion Date on the last day of the Interest Period for that
          Facility A Advance where the last day of that Interest Period falls
          before the Conversion Date. The Borrower shall repay that Facility A
          Advance in the currency it was made unless paragraph (B) applies.

     (B)  Where on any date on which a Facility A Advance is to be repaid (the
          "OLD ADVANCE") the Borrower borrows a further Facility A Advance (the
          "NEW ADVANCE") and either:

          (i)   the New Advance and the Old Advance are both in sterling or the
                Optional Currency; or

          (ii)  the Old Advance is in the Optional Currency and the New Advance
                is in sterling or the Old Advance is in sterling and the New
                Advance is in the Optional Currency,

          then the Agent shall, unless the Borrower requests otherwise, apply
          the New Advance, subject to paragraph (C), in or towards repayment of
          the Old Advance.  This will be treated as satisfying pro tanto the
          obligations of the Borrower to repay the Old Advance and of the
          Lenders to make the New Advance.

     (C)  If paragraph (B)(ii) applies, the Agent shall:

          (i)   apply the amount of the New Advance in or towards the purchase
                of an amount in the currency of the Old Advance; and

          (ii)  use the amount it purchases in or towards satisfaction of the
                Borrower's obligations to repay the Old Advance in the currency
                in which it is outstanding.

          If the amount purchased by the Agent under sub-paragraph (i) is less
          than the amount of the Old Advance, the Agent will promptly notify the
          Borrower and the Borrower must, on the day the Old Advance is due to
          be repaid, pay an amount to the Agent (in the currency in which the
          Old Advance is outstanding) equal to the difference.

          If any part of the amount paid to the Agent by the Lenders in order to
          make the New Advance is not needed to purchase the amount required to
          be repaid by the Borrower, the Agent will promptly notify the Borrower
<PAGE>

          and pay the Borrower on the day the New Advance is to be made that
          part of that amount (in the currency of the New Advance).

9.2  CONVERSION OF FACILITY A

     (A)  If any outstanding Facility A Advance is not repaid on the Conversion
          Date each Facility A Advance outstanding as at the Conversion Date
          will be automatically converted into a Converted Facility A Advance.
          However, there must not be any more than three Converted Facility A
          Advances outstanding at any time.

    (B)  In the event that there are more than three Facility A Advances
         outstanding as at the Conversion Date, the Agent may consolidate these
         Facility A Advances and the Interest Periods relating to them so that
         no more than three Converted Facility A Advances are outstanding. If
         the Lenders incur losses and expenses as a result of this
         consolidation, the Borrower will reimburse each affected Lender for the
         losses and expenses that Lender has incurred, or will, incur as a
         result. These losses and expenses include those incurred in liquidating
         as at the Conversion Date or otherwise utilising amounts borrowed by
         the Lender to fund its participation in the Facility A Advances. They
         may also include losses and expenses incurred in hedging open positions
         resulting from the consolidation of Facility A Advances on the
         Conversion Date.

9.3  REPAYMENT OF FACILITY A LOAN AFTER CONVERSION DATE

     The Borrower agrees to repay the Facility A Loan after the Conversion Date
     in semi-annual instalments on the Facility A Repayment Dates.  A repayment
     may be made on a Facility A Repayment Date from one or more Converted
     Facility A Advances in the currency or currencies in which the relevant
     Converted Facility A Advance or Converted Facility A Advances are
     denominated.  The amount of any repayment in the Optional Currency will be
     at its Original Sterling Amount. The amount of each instalment will be
     determined on the basis of the following table:

<TABLE>
<CAPTION>
FACILITY A REPAYMENT DATE FALLING ON                      PERCENTAGE OF FACILITY A LOAN OUTSTANDING AND
                                                          NOT REPAID ON THE CONVERSION DATE TO BE REPAID
                                                                   IN EACH REPAYMENT INSTALMENT
<S>                                                      <C>
30th June, 2002                                          10%
31st December, 2002                                      10%
30th June, 2003                                          10%
31st December, 2003                                      10%
30th June, 2004                                          10%
31st December, 2004                                      10%
30th June, 2005                                          10%
31st December, 2005                                      10%
Seventh anniversary of the Amendment Date                20%
</TABLE>

     The amount of the final instalment will be the whole of the Facility A Loan
     outstanding at that date.

9.4  REPAYMENT OF FACILITY B ADVANCES

     (A)  The Borrower agrees to repay each Facility B Advance made to it on the
          last day of the Interest Period for that Facility B Advance. The
          Borrower shall repay that Facility B Advance in the currency it was
          made unless paragraph (B)  applies.
<PAGE>

     (B)  Where on any date on which a Facility B Advance is to be repaid (the
          "OLD ADVANCE") the Borrower borrows a further Facility B Advance (the
          "NEW ADVANCE") and either:

          (i)   the New Advance and the Old Advance are both in sterling or the
                Optional Currency; or

          (ii)  the Old Advance is in the Optional Currency and the New Advance
                is in sterling or the Old Advance is in sterling and the New
                Advance is in the Optional Currency,

          the Agent shall, unless the Borrower requests otherwise, apply the New
          Advance, subject to paragraph (C), in or towards repayment of the Old
          Advance.  This will be treated as satisfying pro tanto the obligations
          of the Borrower to repay the Old Advance and of the Lenders to make
          the New Advance.

     (C)  If paragraph (B)(ii) applies, the Agent shall:

          (i)   apply the amount of the New Advance in or towards the purchase
                of an amount in the currency of the Old Advance; and

          (ii)  use the amount it purchases in or towards satisfaction of the
                Borrower's obligations to repay the Old Advance in the currency
                in which it is outstanding.

          If the amount purchased by the Agent under sub-paragraph (i) is less
          than the amount of the Old Advance, the Agent will promptly notify the
          Borrower and the Borrower must, on the day the Old Advance is due to
          be repaid, pay an amount to the Agent (in the currency in which the
          Old Advance is outstanding) equal to the difference.

          If any part of the amount paid to the Agent by the Lenders in order to
          make the New Advance is not needed to purchase the amount required to
          be repaid by the Borrower, the Agent will promptly notify the Borrower
          and pay the Borrower on the day the New Advance is to be made that
          part of that amount (in the currency of the New Advance).

9.5  ADJUSTMENT FOR CURRENCY FLUCTUATIONS

     (A)  If a Converted Facility A Advance is to be outstanding in the Optional
          Currency during two successive Interest Periods, the Agent will
          calculate the amount of that Converted Facility A Advance in the
          Optional Currency for the second of those Interest Periods. It will do
          this by calculating the amount of Optional Currency equal to the
          sterling amount of that Converted Facility A Advance at the Agent's
          spot rate of exchange three Business Days before the first day of that
          second Interest Period) and (subject to paragraph (B) below):

          (i)   if the amount calculated (after allowing for any repayment of
                the Converted Facility A Advance at the end of the first
                Interest Period) is less than the existing amount of that
                Converted Facility A Advance in the Optional Currency during the
                first Interest Period, promptly notify the Borrower and the
                Borrower shall pay, on the first day of the second Interest
                Period, an amount equal to the difference; or

          (ii)  if the amount calculated (after allowing for any repayment of
                the Converted Facility A Advance at the end of the first
                Interest Period) is more than the existing amount of that
                Converted Facility A Advance in the Optional Currency during the
                first Interest Period, promptly notify
<PAGE>

                each Lender and each Lender shall pay, on the first day of the
                second Interest Period, its participation in an amount equal to
                the difference.

     (B)  If the calculation made by the Agent under paragraph (A) above shows
          that the amount of the Converted Facility A Advance in the Optional
          Currency has increased or decreased by less than five per cent.
          compared to its Equivalent Amount (taken as at the first date of the
          first of these Interest Periods), no notification shall be made by the
          Agent and no payment shall be required under paragraph (A) above.

10.  PREPAYMENT

10.1 OPTIONAL PREPAYMENT

     The Borrower may give notice that it will repay the whole or part of the
     Loan on any day prior to the Facility Termination Date. Clause 11.7 applies
     to any repayment under this sub-clause.  This notice must state:

     (A)  the date of prepayment which will be at least five Business Days after
          the notice is received by the Agent;

     (B)  whether the repayment is out of a Facility A Advance (whether before
          or after the Conversion Date) or a Facility B Advance and specifying
          which Facility A Advance or Facility B Advance is affected; and

     (C)  the amount to be prepaid which will be a minimum of (Pounds)5,000,000
          and an integral multiple of (Pounds)1,000,000 in respect of any
          Facility or the whole of the amount outstanding under that Facility.

     The Borrower agrees to repay the Loan in accordance with its notice.  A
     prepayment of the Facility A Loan after the Conversion Date will reduce the
     repayment instalments under Clause 9 starting with the next succeeding
     instalment and working forwards, but so that:

          (i)   no more than two repayment instalments; and

          (ii)  no instalment falling due more than 18 months after the date of
                prepayment,

     will be reduced in this way. That amount (if any) of the prepayment which
     is not applied in accordance with the preceding sentence (the "RESIDUAL
     AMOUNT") will be applied in reducing all the remaining repayment
     instalments under the Facility A Loan.  In this case each remaining
     repayment instalment will be reduced by an amount calculated by dividing
     the residual amount by the number of remaining repayment instalments.
     Where any prepayment amount in respect of a particular remaining repayment
     instalment reduces that remaining repayment instalment to zero the balance
     of that amount will be re-applied to the other remaining repayment
     instalments as if it were a residual amount.

10.2 MANDATORY PREPAYMENT ON DISPOSALS

     (A)  OBLIGATION TO PREPAY: The Borrower agrees to prepay the Loan in
          accordance with this sub-clause.
<PAGE>

     (B)  CIRCUMSTANCES IN WHICH OBLIGATION TO PREPAY ARISES: The Borrower will
          be obliged to make a prepayment under this sub-clause in the following
          circumstance:

         (i)    In the case of Facility A,

                (a) the Total Facility A Commitments are cancelled (in whole or
                    in part) under Clause 5.3; and

                (b) as a result of that cancellation (or otherwise), the
                    Facility A Loan would otherwise exceed the Total Facility A
                    Commitments following the cancellation,

          (ii)  In the case of Facility B,

                (a) the Total Facility B Commitments are cancelled (in whole or
                    in part) under Clause 5.3; and

                (b) as a result of that cancellation (or otherwise), the
                    Facility B Loan would otherwise exceed the Total Facility B
                    Commitments following the cancellation.

     (C)  AMOUNT OF MANDATORY PREPAYMENT: The amount the Borrower is obliged to
          repay under this sub-clause will be:

          (i)   the a mount by which the Facility A Loan would exceed the Total
                Facility A Commitments as described in Clause 10.2(B)(i)(b); and

          (ii)  the amount by which the Facility B Loan would exceed the Total
                Facility B Commitments as described in Clause 10.2(B)(ii)(b).

          The amount required to be repaid under this sub-clause on any occasion
          may be less than (Pounds)5,000,000.  In this case the amount which
          would otherwise be due to be repaid will be reserved, but not repaid.
          On the next occasion an amount becomes repayable under this sub-clause
          the amount reserved will be added to that amount and the aggregate
          will be repayable if it exceeds (Pounds)5,000,000.  If it does not
          exceed (Pounds)5,000,000 the aggregate amount will be reserved and the
          previous sentence will apply to this aggregate reserved amount.  The
          Borrower may elect to repay any amount which would otherwise be
          reserved under this paragraph.  In this case it will repay that amount
          (and any amount previously reserved and not repaid under this
          paragraph) in accordance with paragraph (E) and that amount will not
          be reserved.

     (D)  TIMING OF MANDATORY PREPAYMENT: Subject to paragraph (E), the amount
          repayable under this sub-clause will become due for repayment on the
          date the applicable cancellation occurs under Clause 5.3(D). Clause
          11.7 applies to any repayment under this sub-clause.

     (E)  BREAK COSTS: The Borrower may certify to the Agent that a repayment
          required under this sub-clause:

          (i)   is due on a date other than the last day of the Interest Period
                applicable to the amount being repaid; or

          (ii)  would cause it to incur broken funding costs in respect of one
                or more of the Hedging Contracts.
<PAGE>

          The Borrower's obligation to make a repayment under this sub-clause
          will be deferred until the last day of the Interest Period applicable
          to the amount being repaid.  This deferral will only apply, however,
          if the Borrower deposits in the Charged Account an amount equal to the
          amount which it would otherwise have been obliged to repay (save to
          the extent the prepayment obligation will be discharged by an amount
          already standing to the credit of the Charged Account).  This deposit
          must be made on or before the date the repayment would otherwise have
          been due.

     (F)  APPLICATION OF PREPAYMENT: A prepayment of the Facility A Loan under
          this sub-clause after the Conversion Date will reduce each outstanding
          repayment instalment under Clause 9 by an amount calculated by
          dividing the amount to be prepaid by the number of remaining repayment
          instalments applicable to the Facility A Loan. Where any prepayment
          amount in respect of a particular remaining repayment instalment
          reduces that remaining repayment instalment to zero the balance of
          that prepayment amount shall be re-applied to the other remaining
          repayment instalments in accordance with the preceding sentence.

10.3 MANDATORY PREPAYMENT OF FACILITY A LOAN ON EXCESS CASH FLOW

     (A)  OBLIGATION TO PREPAY: The Borrower agrees to prepay the Facility A
          Loan in accordance with this sub-clause.

     (B)  CIRCUMSTANCES IN WHICH OBLIGATION TO PREPAY ARISES: The Borrower will
          be obliged to make a prepayment under this sub-clause in the event
          that, after the Conversion Date, Excess Cash Flow in respect of a
          financial year (including any financial year in which the Facility A
          Commitment Availability Termination Date falls) is positive (an
          "EXCESS CASH FLOW EVENT"). The requirement to make a prepayment under
          this sub-clause will no longer apply after the date on which
          annualised Debt Coverage (computed in accordance with Clause 8.8(B))
          is below 3:1 for two successive Quarters and for so long as the
          annualised Debt Coverage remains at no more than 3:1.

     (C)  AMOUNT OF MANDATORY PREPAYMENT: The amount the Borrower is obliged to
          repay under this sub-clause will be half the amount of the positive
          Excess Cash Flow described in Clause 10.3 (B).

          The amount required to be repaid under this sub-clause on any occasion
          may be less than (Pounds)5,000,000.  In this case the amount which
          would otherwise be due to be repaid will be reserved, but not repaid.
          On the next occasion an amount becomes repayable under this sub-clause
          the amount reserved will be added to that amount and the aggregate
          will be repayable if it exceeds (Pounds)5,000,000.  If it does not
          exceed (Pounds)5,000,000 the aggregate amount will be reserved and the
          previous sentence will apply to this aggregate reserved amount.  The
          Borrower may elect to repay any amount which would otherwise be
          reserved under this paragraph.  In this case it will repay that amount
          (and any amount previously reserved and not repaid under this
          paragraph) in accordance with paragraph (D) and that amount will not
          be reserved.

     (D)  TIMING OF MANDATORY PREPAYMENT: The amount repayable under this sub-
          clause will become due for repayment on the earlier of:

          (i)   the date 90 days after the date of delivery to the Agent of the
                certificate relating to Excess Cash Flow described in Clause
                18.1(l) (with the date of delivery of this certificate being the
                "EXCESS CASH FLOW CERTIFICATE DELIVERY DATE"); or
<PAGE>

          (ii)  subject to paragraph (E), the first date after the Excess Cash
                Flow Certificate Delivery Date which is the last day of an
                Interest Period in respect of a Facility A Advance which is in
                an amount equal to or greater than the amount due for repayment
                under this sub-clause.

          Clause 11.7 applies to any repayment under this sub-clause.

     (E)  BREAK COSTS: The Borrower may certify to the Agent that a repayment
          required under this sub-clause:

          (i)   is due on a date other than the last day of the Interest Period
                applicable to the amount being repaid; or

          (ii)  would cause it to incur broken funding costs in respect of one
                or more of the Hedging Contracts.

          The Borrower's obligation to make a repayment under this sub-clause
          will be deferred until the last day of the Interest Period applicable
          to the amount being repaid.  This deferral will only apply, however,
          if the Borrower deposits in the Charged Account an amount equal to the
          amount which it would otherwise have been obliged to repay (save to
          the extent the prepayment obligation will be discharged by an amount
          already standing to the credit of the Charged Account).  This deposit
          must be made on or before the date the repayment would otherwise have
          been due.

     (F)  APPLICATION OF PREPAYMENT: A prepayment of the Facility A Loan under
          this sub-clause will reduce each outstanding repayment instalment
          under Clause 9 by an amount calculated by dividing the amount to be
          prepaid by the number of remaining repayment instalments applicable to
          the Facility A Loan. Where any prepayment amount in respect of a
          particular remaining repayment instalment reduces that remaining
          repayment instalment to zero the balance of that prepayment amount
          shall be re-applied to the other remaining repayment instalments in
          accordance with the preceding sentence.

     (G)  EXCESS CASH FLOW: In this Agreement "EXCESS CASH FLOW" for any
          financial year (the "CURRENT FINANCIAL YEAR") means EBITDA for the
          current financial year:

          (i)   plus all non-cash charges deducted in establishing EBITDA for
                the current financial year, unless those non-cash charges are
                provisions for cash expenditure due to be made in the next
                financial year;

          (ii)  plus any non-cash charges deducted in establishing EBITDA for
                the previous financial year which were provisions for cash
                expenditure in the current financial year, but where that cash
                expenditure was not made in the current financial year;

          (iii) plus the amount of any tax rebate or credit in respect of any
                advance corporation tax, mainstream corporation tax or
                withholding tax or their equivalent in any relevant jurisdiction
                actually received in cash by any member of the Borrower's
                Restricted Group during the current financial year;

          (iv)  minus the Net Disposal Proceeds received during the current
                financial year to the extent applied in (or reserved for)
                prepayment of the Loan pursuant to Clause 10.2;

          (v)   minus Net Cash Interest for the current financial year;
<PAGE>

          (vi)   minus all advance corporation tax, mainstream corporation tax
                 and withholding tax or their equivalent in any relevant
                 jurisdiction actually paid or falling due for payment during
                 the current financial year (but excluding any amount paid in
                 the current financial year which was included in the Excess
                 Cash Flow computation for a previous financial year because it
                 fell due in that previous financial year);

          (vii)  minus the aggregate principal amount of Indebtedness for
                 Borrowed Money (other than of a revolving nature) falling due
                 for repayment in the current financial year or prepaid in the
                 current financial year under Clause 10.1;

          (viii) minus:

                 (a) all capital expenditure made during the current financial
                     year; less

                 (b) the amount deducted pursuant to sub-paragraph (ix) in the
                     Excess Cash Flow calculation made in respect of the
                     previous financial year less the amount added pursuant to
                     sub-paragraph (x) in respect of the current financial year;

          (ix)   minus capital expenditure included in the budget for the
                 current financial year (and not included in the budget for any
                 previous financial year) but not spent in the current financial
                 year, but so that an amount may only be deducted under this
                 sub-paragraph to the extent that a deposit equal to this amount
                 is made, specifically for this purpose, into the Charged
                 Account on or before the date on which the audited financial
                 statements for the current financial year in respect of the
                 Borrower's Restricted Group are delivered to the Agent pursuant
                 to Clause 18.1(b);

          (x)    plus the amount determined in accordance with the following
                 formula:

                               A = D - (CE - B)

                 where:

                 A   =  the amount to be determined under this sub-paragraph
                        (but if the result of the computation is to produce a
                        negative number, A will be zero)

                 D   =  the amount deducted pursuant to sub-paragraph (ix) in
                        respect of the previous financial year

                 CE  =  capital expenditure in the current financial year

                 B   =  the capital expenditure in the budget for the current
                        financial year (and not included in the budget for any
                        previous financial year)

                 but so that if CE - B produces a negative result it will be
                 treated as zero and so A = D.

10.4 MANDATORY PREPAYMENT OF LOAN ON FLOTATION

     (A)  OBLIGATION TO PREPAY: The Borrower agrees to prepay the Loan in
          accordance with this sub-clause.
<PAGE>

     (B)  CIRCUMSTANCES IN WHICH OBLIGATION TO PREPAY ARISES: The Borrower will
          be obliged to make a prepayment under this sub-clause upon the shares
          of the Borrower or the Parent or any intermediate Holding Company
          between the Borrower and the Parent becoming the subject of an initial
          public offering in connection with the application by the relevant
          Company for the admission of its shares to listing on any stock
          exchange or its shares being made available for the first time for
          dealing through any public dealings facility.

     (C)  AMOUNT OF MANDATORY PREPAYMENT: The amount the Borrower is obliged to
          repay under this sub-clause will be the full amount of the Loan.

     (D)  TIMING OF MANDATORY PREPAYMENT: The amount repayable under this sub-
          clause will become due for repayment on the earlier of:

          (i)   the date of receipt of the sale or issue proceeds by a member of
                the Group or any shareholder in any member of the Group; and

          (ii)  the date of listing becoming effective. Clause 11.7 applies to
                any repayment under this sub-clause.

     (E)  EFFECT OF PREPAYMENT: A prepayment of the Loan under this sub-clause
          will reduce the Total Facility A Commitments and Total Facility B
          Commitments to zero.

10.5 PREPAYMENT UNDER CLAUSE 11

     A prepayment of a Lender's participation in the Facility A Loan after the
     Conversion Date under Clause 11.1(B), 11.2(D), 11.3(D) or 11.4(E) will
     reduce each outstanding repayment instalment under Clause 9 proportionately
     to that Lender's participation in the Facility A Loan.

10.6 NO OTHER PREPAYMENT

     The Borrower may not repay the Loan early except in the manner permitted or
     required by this Agreement.

10.7 NO RE-BORROWING

     No amount of the Facility A Loan which is repaid after the Conversion Date
     may be re-borrowed.
<PAGE>

                PART IV: CHANGES OF CIRCUMSTANCES AND PAYMENTS

11.  CHANGES OF CIRCUMSTANCES

11.1 ILLEGALITY

     (A)  NOTICE: Each Lender may notify the Borrower if it has reasonable cause
          to believe it is or will be acting illegally in relation to the
          Facilities. The illegality may relate to the performance of the
          Lender's obligations, the maintenance of the Facilities or the
          Lender's funding arrangements. Each Lender confirms it is not acting
          illegally in relation to the Facilities on the Amendment Date.

     (B)  CANCELLATION AND PREPAYMENT: If a Lender delivers a notice of
          illegality the Available Commitment of that Lender will be cancelled
          on the date of that notice. If the Lender certifies that, because of a
          legal requirement applicable to the Lender, the participation of that
          Lender in the Loan must be repaid before the last day of any
          applicable Interest Period the Borrower agrees to repay the
          participation on the earlier date specified by the Lender. Clause 11.7
          applies to any cancellation or repayment under this sub-clause.

11.2 INCREASED COSTS

     (A)  TYPES OF INCREASED COSTS: This sub-clause applies where all of (i),
          (ii) and (iii) are true:

          (i)   Either:

                (a) there is a change in a legal requirement applicable to a
                    Lender Group Company or in any other requirement with which
                    it is accustomed to comply, or a change in its
                    interpretation or application; or

                (b) a Lender Group Company complies with a direction or request
                    of an authority with whose directions or requests it is
                    accustomed to comply.

          (ii)  As a result, any of the following occurs:

                (a) a Lender Group Company incurs an expense;

                (b) a Lender Group Company's effective return from the
                    Facilities or on its overall capital is reduced;

                (c) any amount payable to a Lender Group Company is reduced; or

                (d) a Lender Group Company does not recover an amount which
                    would otherwise have been paid to it.

               No account will be taken of tax on the overall net income
               (including overall net profit or gains) of a Lender, or a Lender
               Group Company, in the country in which it has its principal
               office or the office through which it is acting for the purposes
               of this Agreement.  Any loss, reduction or expense wholly
               reflected in the Costs Rate, or which is recoverable under Clause
               4.8 or Clause 11.4 (or would have been so recoverable but for
               Clause 11.5) will also not be taken into account.
<PAGE>

          (iii) The losses, reductions and expenses arising as a result are
                wholly or partly attributable to the Lender's participation in
                the Facilities or the arrangements made by a Lender in funding
                its participation in the Facilities.

     (B)  NOTICE: Each Lender may notify the Borrower if it becomes aware that
          this sub-clause applies. This notice will contain reasonable detail of
          the circumstances which have caused this sub-clause to apply.

     (C)  PAYMENT OF ADDITIONAL AMOUNTS: The Borrower agrees to reimburse each
          Lender for the losses, reductions, expenses and unrecovered amounts
          described in paragraph (A).

     (D)  PREPAYMENT AND CANCELLATION: If a Lender delivers a notice under
          paragraph (B):

          (i)   the Borrower may deliver to that Lender a notice of prepayment.
                The Borrower agrees to prepay the participation of that Lender
                in the Loan five Business Days after the Lender receives this
                notice (or on any later date or dates specified in the notice).
                Clause 11.7 applies to this prepayment; and/or

          (ii)  the Borrower may deliver to that Lender a notice of
                cancellation. That Lender's Available Facility A Commitment and
                Available Facility B Commitment will be reduced to zero on the
                date of delivery of that notice.

     (E)  BASLE EXCEPTION: Paragraph (C) will not oblige the Borrower to
          compensate any Lender in respect of itself or any other Lender Group
          Company for any losses, reductions and expenses described in paragraph
          (A)(ii) which result from the implementation, as at the Amendment
          Date, of the matters set out in the July 1988 report of the Basle
          Committee on Banking Regulations and Supervisory Practices entitled
          "International Convergence of Capital Measurement and Capital
          Standards" (the "BASLE REPORT"), the Directive of the Council of the
          European Communities on a Solvency Ratio for Credit Institutions
          (89/647/EEC of 18th December, 1989) (the "SOLVENCY DIRECTIVE") or the
          Directive of the Council of the European Communities on Own Funds of
          Credit Institutions (89/299/EEC of 17th April, 1989) (the "OWN FUNDS
          DIRECTIVE") in each case as amended prior to the Amendment Date. This
          exception will not apply if the losses, reductions and expenses
          described in paragraph (A)(ii) result from any change after the
          Amendment Date in, or in the interpretation or application of, the
          Basle Report, the Solvency Directive or the Own Funds Directive.

11.3 MARKET DISRUPTION

     (A)  NATURE OF MARKET DISRUPTION: This sub-clause applies if any of (i),
          (ii), or (iii) are true:

          (i)   Lenders with Available Commitments exceeding 35% of the
                aggregate Available Commitments, or with participations
                exceeding 35% of the Loan, notify the Agent that they believe
                that LIBOR or, as the case may be, EURIBOR would not reflect
                fairly the cost to them of funding an amount outstanding under
                this Agreement. For the purpose of making this computation, the
                Agent will disregard a notice from a Lender in circumstances
                where the Borrower has satisfied the Agent (supported
<PAGE>

                by any evidence that the Agent may reasonably request) that the
                only reason why LIBOR or, as the case may be, EURIBOR would not
                reflect fairly the cost to that Lender of funding its
                participation in an Advance is a deterioration in that Lender's
                credit standing.

          (ii)  LIBOR or, as the case may be, EURIBOR cannot be determined
                because no rate appears on the Screen for the relevant currency
                for the necessary period and fewer than two Reference Banks
                provide quotations.

          (iii) Lenders with Available Commitments exceeding 35% of the
                aggregate Available Commitments, or with participations
                exceeding 35% of the Loan, notify the Agent that they are unable
                to fund their participations in the Loan in the London inter-
                bank market or, as the case may be, European inter-bank market.
                (B) NOTICE: The Agent agrees to notify the Borrower and the
                Lenders if this sub-clause applies.

     (C)  ALTERNATIVE INTEREST RATE ARRANGEMENTS: If the Agent delivers a notice
          of market disruption each of the following applies:

          (i)   The means of determining the rates of interest applicable to the
                Advance or Advances affected (the "AFFECTED ADVANCE") will be
                suspended. Instead the Borrower agrees to pay interest to the
                Lenders on the Affected Advance in the manner requested by the
                Agent in accordance with this clause. A request by the Agent may
                specify periods to be used for the computation of interest. It
                must also specify the rate of interest to apply for a period.
                This rate will be the rate determined by the Agent to reflect
                the cost to each Lender of funding the Affected Advance for the
                period plus the Applicable Margin plus (in the case of Advances
                in sterling) the Costs Rate. In order to assist the Agent in
                this determination each Lender agrees to provide to the Agent
                any information which the Agent may request. If this information
                is received by the Agent within any time period specified by the
                Agent it will be taken into account by the Agent in making its
                determination.

          (ii)  The Borrower and the Agent will negotiate the terms of an
                alternative arrangement for determining a rate of interest for
                the Affected Advance. The negotiations will be carried on in
                good faith. Neither party is bound to continue the negotiations
                after the date 30 days after the Borrower receives the Agent's
                notice. If agreement is reached and if it is approved by all the
                Lenders the rate of interest will be determined in accordance
                with the agreement. Sub-paragraph (i) will not apply to the
                extent that it is expressly excluded by that agreement.

          (iii) If the circumstances described in paragraph (A) cease to apply
                the Agent will notify the Borrower and the Lenders. The notice
                will specify the transitional arrangements proposed by the Agent
                which as far as possible will be in accordance with the normal
                interest rate fixing provisions of this Agreement. The Borrower
                agrees to pay interest to the Lenders on the Affected Advance in
                the manner described in this notice unless a different
                arrangement is agreed by the Agent and the Borrower and approved
                by all the Lenders. In this case the Borrower agrees to pay
                interest to the Lenders in the manner agreed.
<PAGE>

     (D)  PREPAYMENT: If this sub-clause applies, the Borrower may deliver a
          notice of prepayment to the Agent. The Borrower agrees to prepay the
          Loan or, at the Borrower's election, the Affected Advance or Affected
          Advances five Business Days after the Agent receives this notice (or
          on any later date or dates specified in the notice). Clause 11.7
          applies to this prepayment.

     (E)  WITHDRAWAL: If this sub-clause applies, the Borrower may notify the
          Agent before 12.30 p.m. on the Advance Date relating to the Affected
          Advance that it wishes to withdraw the notice of borrowing relating to
          the Affected Advance. In this case that notice of borrowing will be
          treated as having not been made. Clause 6.6 will not apply in these
          circumstances.

11.4 WITHHOLDINGS

     (A)  WITHHOLDINGS AND DEDUCTIONS: This sub-clause applies if the Borrower,
          a Guarantor or the Agent is required by law, or by any requirement of
          a taxing authority with which it is obliged to comply, to make a
          payment under this Agreement net of a withholding or deduction.

     (B)  NOTICE: The Borrower agrees to notify the Agent if it becomes aware
          that this sub-clause applies.

     (C)  GROSSING UP: The Borrower and each Guarantor agrees to increase the
          amount of any payment from which it has to withhold or deduct any sum.
          This increase will ensure that the person entitled to the payment will
          receive, after that sum has been deducted or withheld, the amount it
          would have received had no sum had to be withheld or deducted.

     (D)  PAYMENT OF TAX: The Borrower and each Guarantor will pay to the
          appropriate authority all amounts withheld or deducted by it and
          certify to the Agent's reasonable satisfaction that it has withheld or
          deducted those sums and paid them to that authority. If a receipt or
          other evidence of payment can be obtained from that authority without
          incurring unreasonable cost or expense, the Borrower or that Guarantor
          agrees to deliver this to the Agent as soon as reasonably practicable.

     (E)  PREPAYMENT AND CANCELLATION: If this clause applies to payments by the
          Borrower:

          (i)   the Borrower may deliver to the Agent a notice of prepayment.
                This notice may relate to any part of the Loan which is subject
                (or the interest on which is subject) to the withholding or
                deduction. The Borrower agrees to prepay the Loan (or the part
                of it which is affected) five Business Days after the Agent
                receives this notice (or on any later date or dates specified in
                the notice). Clause 11.7 applies to this prepayment; and/or

          (ii)  the Borrower may deliver to the Agent a notice of cancellation.
                This notice may relate to any part of the Total Facility A
                Commitments or Total Facility B Commitments which, if drawn,
                would be subject (or the interest on which would be subject) to
                the withholding or deduction. That part of the Total Facility A
                Commitments or Total Facility B Commitments will be reduced to
                zero on the date of delivery of that notice.
<PAGE>

     (F)  REFUND OF TAX CREDITS: If the Borrower or a Guarantor makes an
          increased payment under Clause 11.4(C) (a "TAX PAYMENT") the relevant
          Lender or, as the case may be, the Agent agrees to notify the Borrower
          if it has obtained a refund of tax or obtained and used a credit
          against tax on its overall net income (a "TAX CREDIT") which that
          Lender or, as the case may be, the Agent is able to identify as
          attributable to that Tax Payment. To the extent that it can in its
          absolute discretion without any adverse consequences for it, that
          Lender or, as the case may be, the Agent shall reimburse the Borrower
          or, as the case may be, that Guarantor such amount as the Lender or,
          as the case may be, the Agent determines to be the proportion of that
          Tax Credit as will leave the Lender or, as the case may be, the Agent
          (after that reimbursement) in no better or worse position in respect
          of its tax liabilities than it would have been in if no Tax Payment
          had been required. No Lender or, as the case may be, Agent shall be
          obliged to disclose any information regarding its tax affairs and
          computations, and this sub-clause does not affect the right of any
          Lender or, as the case may be, Agent to arrange its tax affairs as it
          thinks fit.

11.5 INLAND REVENUE TREATMENT OF THE LENDERS

     The Borrower and each Guarantor will not be required to pay increased
     amounts under Clause 11.4 in respect of a payment of interest to a Lender
     in either of the following cases:

     (A)  At the date the principal amount on which that interest accrued was
          advanced that Lender was not a bank for the purposes of section 349(3)
          of the Income and Corporation Taxes Act 1988.

     (B)  The person beneficially entitled to that payment of interest at the
          time it is paid is not within the charge to United Kingdom corporation
          tax in respect of that interest.

     This sub-clause only applies so far as a withholding or deduction is due to
     the circumstances described in paragraph (A) or (B) above.  It does not
     apply where the circumstances described in paragraph (A) or (B) above arise
     as a result of a change in law or concession or a change in the
     interpretation or application of law or concession.  Each Lender agrees to
     notify the Agent if paragraph (A) or (B) above applies.

11.6 CONFIRMATIONS FROM LENDERS

     The Borrower or the Agent may request a Lender to confirm whether or not
     the circumstances described in Clause 11.5(A) or (B) exist.  Each Lender
     agrees to provide the confirmation requested as soon as reasonably
     practicable.

11.7 PREPAYMENT

     This sub-clause applies if the Borrower is obliged to repay the Loan or any
     part of it under this Clause, Clause 10 or Clause 21.2.  In this event the
     Borrower agrees to pay on the date repayment is due interest accrued on the
     Loan (or the amount to be repaid) up to that date.  If the date repayment
     is due is not the last day of an Interest Period applicable to the amount
     being repaid, the Borrower will reimburse each affected Lender for the
     losses and expenses that Lender has incurred, or will incur, as a result.
     These losses and expenses may include those incurred in liquidating or
     otherwise utilising amounts borrowed by the Lender to fund its
     participation in the Loan (or the amount repaid).  They may also include
     losses and expenses incurred in hedging open positions resulting from the
     repayment.
<PAGE>

11.8 MITIGATION

     This sub-clause does not affect the obligations of the Borrower under the
     other sub-clauses of this Clause.  If this Clause applies to a Lender or
     the Agent, that Lender or the Agent will take all steps reasonably open to
     it and, as the case may be, will procure that any Lender Group Company
     takes all steps reasonably open to it, to reduce the additional amounts
     payable by the Borrower under this Clause or to avoid or reduce the impact
     of the circumstances referred to in it.  These steps may include the
     transfer of the Lender's rights and obligations under this Agreement to
     another branch or bank acceptable to the Borrower.  The Lender or Lender
     Group Company or the Agent will not, however, be obliged to do anything
     which in its opinion would or might have an adverse effect on it.

12.  PAYMENTS

12.1 METHOD AND TIMING OF PAYMENTS

     All payments under this Agreement must be made in immediately available and
     freely transferable funds.  Each payment must be received by noon on the
     due date. Each payment must be for value on the due date.

12.2 CURRENCY OF PAYMENT

     Each Advance is to be advanced and repaid in the currency in which it is
     denominated. Interest on an Advance is to be paid in the same currency as
     the Advance. All other payments are to be made in sterling, unless this
     Agreement specifies a different currency.

12.3 PAYMENTS IN EURO

     Each payment by the Agent in euro will be made in euro units rather than
     NCU, unless the Agent notifies the recipient otherwise.  This does not
     affect the rights of any party under the EMU legislation or other
     applicable law to make euro payments in NCU or receive euro payments
     credited to its account in NCU.  The Agent will not be liable for any
     failure to make payments on their due date arising from any failure in any
     cross-border euro payment system.  In addition, Clause 22.8(A) applies.

12.4 PAYMENTS THROUGH THE AGENT

     (A)  NORMAL ARRANGEMENTS: All payments by the Borrower or by a Lender under
          this Agreement will be made through the Agent. Each sterling payment
          will be made to the account of the Agent with The Royal Bank of
          Scotland plc, Correspondent Banking Branch, 5-10 Great Tower Street,
          London EC3P 3HX, account name Credit Suisse First Boston, account
          number 12302000, CHAPS Code 16-52-24. Each euro payment will be made
          to the account of the Agent with Citibank N.A., London Branch, account
          name Credit Suisse First Boston, London Branch, account number
          8552940. The Agent will pay on an amount received as soon as
          practicable.

     (B)  ALTERNATIVE ARRANGEMENTS: If the Agent believes that it is, or will
          be, illegal or impossible for it to pay on to a Lender in accordance
          with paragraph (A), it agrees to notify the Borrower and that Lender.
          In this case the Borrower and that Lender may agree alternative
          arrangements for payments to be made to that Lender. Paragraph (A)
          will not apply to the extent excluded by those alternative
          arrangements. That Lender agrees to provide notice of the
<PAGE>

          arrangements to the Agent and will notify the Agent of payments in
          accordance with Clause 14.1.

          (C)  APPLICATION OF DEPOSIT PAYMENTS: The Borrower is not required to
               make payments in accordance with this sub-clause to the extent
               that an amount is debited from the Charged Account in accordance
               with Clause 3(D) of the Deposit Agreement and Charge on Cash
               Deposits.

12.5 PAYMENTS TO THE BORROWER

     Each payment by the Agent to the Borrower will be made to the account of
     the Borrower which is notified to the Agent by the Borrower for this
     purpose.

12.6 PAYMENTS TO THE LENDERS

     Each payment by the Agent to a Lender will be made to the account of that
     Lender notified to the Agent for this purpose.

12.7 CHANGE OF ACCOUNT

     The Borrower or a Lender may change any of its receiving accounts by not
     less than five Business Days' notice to the Agent.  The Agent may change
     any of its receiving accounts by giving not less than five Business Days'
     notice to the Borrower and the Lenders.

12.8 REFUNDING OF PAYMENTS BY THE AGENT

     This sub-clause applies if the Agent makes a payment out in the mistaken
     belief that it has received or will receive an incoming payment on a
     particular day.  In this case the person which received the payment from
     the Agent agrees to return it.  It will also reimburse the Agent for all
     losses and expenses incurred by the Agent as a result of funding the
     payment.  This sub-clause does not affect the rights of the person which
     received the payment against the person which failed to make the payment to
     the Agent.

12.9 NON-BUSINESS DAYS

     If a payment would be due on a non-Business Day the payment obligation will
     be deferred until the next Business Day unless that day is in another
     calendar month.  Where it is in another calendar month that payment
     obligation will be brought forward to the previous Business Day.  Interest
     and commitment fees will be adjusted accordingly.

12.10  PAYMENT IN FULL

     All payments by the Borrower will be made in full and without set-off or
     counterclaim.  No payment will be made net of a withholding or deduction,
     unless this is required by law or by any requirement of a taxing authority
     with which it is obliged to comply.  In this event Clause 11.4 applies.

12.11  SET-OFF

     If a Company owes money under this Agreement which is due and payable the
     person to whom it is owed may set-off this obligation against any moneys
     owed by that person to that Company.  The moneys owed by that party may be
     in a different currency, arise on a separate transaction or involve another
     branch.  This sub-clause applies even where amounts owed to that Company
     are not due and payable, if there is an outstanding Termination Event or
     Potential Termination Event.  Where amounts are in different currencies the
     person to whom money is owed under this Agreement may
<PAGE>

     convert amounts into the same currency using the then current exchange
     rate. If a Lender sets off an obligation under this Agreement, that Lender
     agrees promptly to notify the Company concerned in accordance with Clause
     24.3. The notice will provide details of the amount set off.

13.  LATE PAYMENT

13.1 DEFAULT INTEREST

     The Borrower agrees to pay interest on all amounts unpaid under this
     Agreement after their due date for payment.  This interest will be computed
     by reference to successive periods selected by the Agent.  The first of
     these periods will start on the due date for payment of the unpaid amount.
     The rate of interest applicable during each of these periods will be a rate
     per annum equal to 1% plus:

     (A)  in the case of an amount in sterling, LIBOR for that period plus the
          Costs Rate; or

     (B)  in the case of an amount in euros, EURIBOR for that period,

     plus, in either case, the Applicable Margin. This interest will be paid in
     arrear on the last day of each of these periods and on the date of payment
     of the unpaid amount. This interest will be payable after as well as before
     judgment.

13.2 INDEMNITY

     If the Borrower fails to make a payment on the due date the Borrower agrees
     to reimburse the person entitled to the payment for the losses and expenses
     (including loss of profit) that person incurs, or will incur, as a result.
     The computation of these losses and expenses will take into account any
     amount received under Clause 13.1.

14.  SHARING AMONG LENDERS

14.1 NOTICE

     If an amount due to a Lender (the "RECIPIENT") under this Agreement is
     discharged other than by payment through the Agent the Lender agrees to
     notify the Agent and the Borrower in accordance with Clause 24.3.  This may
     occur because of the exercise of a right of set-off, by virtue of a
     combination of accounts or because of a voluntary or involuntary payment by
     the Borrower or a Guarantor direct to that Lender.  The notification will
     provide details of the amount discharged and will be delivered no later
     than ten Business Days after the discharge.

14.2 DETERMINATION BY THE AGENT

     Where a Lender has issued a notice under Clause 14.1 the Agent will
     determine what payments, if any, are due under Clause 14.4.  This
     determination will be made on the basis of the information contained in all
     the notices delivered to the Agent under Clause 14.1.  The determination
     will be notified to the Borrower and the Lenders.

14.3 LITIGATION

     In determining the amount due under Clause 14.4 no account will be taken of
     an amount due to a Lender which has declined to participate in legal
     proceedings which resulted in
<PAGE>

     the payment described in Clause 14.1. This only applies if that Lender
     could have joined in the proceedings or could have instituted its own
     proceedings, but failed to do so.

14.4 PAYMENT TO THE AGENT

     The Recipient agrees to pay to the Agent an amount calculated as follows:

                                 P = D (X - Y)

     where

          P =  the amount payable to the Agent

          D =  the aggregate amount due to the Recipient out of which an amount
               has been discharged

          X =  the fraction of D which has been discharged

          Y =   the fraction which has been discharged, if any, of the aggregate
               amount due to the Lender which has the greatest proportion of
               that amount still outstanding.

     This amount will be paid no later than five Business Days after receipt of
     a notice from the Agent under Clause 14.2.

14.5 OBLIGATIONS OF THE BORROWER AND THE GUARANTORS

     Any amount due to the Recipient which would otherwise have been discharged
     as described in Clause 14.1 will be treated as not having been discharged
     to the extent of an amount which is or will be payable under Clause 14.4 as
     a result.  Accordingly the Borrower and each Guarantor agree to pay this
     amount to the Recipient as if it had not been discharged.  This payment is
     required to be made whether or not the Agent has issued a determination
     under Clause 14.2.

14.6 DISTRIBUTION

     The Agent agrees to distribute to the Lenders the amount received by it
     under Clause 14.4 as if that amount had been received from the Borrower in
     discharge of an amount due under this Agreement.  The Borrower will then be
     treated as having paid that amount.

14.7 RECOVERY

     This sub-clause applies if an amount discharged as described in Clause 14.1
     is recovered from, or is required to be repaid by, the Recipient.  In this
     case each Lender which received the benefit of a payment made under Clause
     14.4 agrees to repay to the Recipient the amount it received.  Each of
     these Lenders will also reimburse the Recipient for any losses or expenses
     which the Recipient has incurred in connection with the discharged amount
     or its recovery or repayment.  The rights and obligations of the parties
     shall be restored to the position before any payment became due under
     Clause 14.4.
<PAGE>

                       PART V : GUARANTEE AND INDEMNITY

15.  GUARANTEE

15.1 GUARANTEE

     Each Guarantor guarantees the due and punctual performance of all
     obligations of the Borrower (or, as the case may be, each Restricted
     Subsidiary) under this Agreement, each Hedging Contract and each Overdraft
     Facility.  This guarantee is unconditional and irrevocable.

15.2 AGREEMENT TO PAY

     Each Guarantor agrees to pay on demand each amount due by the Borrower (or,
     as the case may be, each Restricted Subsidiary) which is unpaid.  The
     demand may be made at any time on or after the due date for payment.
     Payment will be made in the same currency as the amount due by the Borrower
     (or, as the case may be, each Restricted Subsidiary).

15.3 CONTINUING GUARANTEE

     This guarantee is a continuing guarantee. No payment or other settlement
     will discharge any Guarantor's obligations until the Borrower's obligations
     (or, as the case may be, each Restricted Subsidiary's obligations) have
     been discharged in full.

15.4 OTHER GUARANTEES AND SECURITY
     This guarantee is in addition to, and independent of, any other guarantee
     or security.

15.5 ENFORCEMENT

     This guarantee may be enforced before any steps are taken against the
     Borrower (or, as the case may be, each Restricted Subsidiary) or any other
     Guarantor or under any other guarantee or Security.

15.6 PRESERVATION OF RIGHTS

     This guarantee will only be discharged by (i) the making of payment (in the
     case of this Agreement, in accordance with Clause 12) in full by the
     Borrower (or, as the case may be, the relevant Restricted Subsidiary) or
     any of the Guarantors or (ii) the receipt otherwise of payment in full. It
     will not be discharged by any other action, omission or fact. Each
     Guarantor's obligations will, therefore, not be affected by:

     (A)  The obligations of the Borrower (or, as the case may be, the relevant
          Restricted Subsidiary) being or becoming void, invalid, illegal or
          unenforceable.

     (B)  Any change, waiver or release of the Borrower's (or, as the case may
          be, the relevant Restricted Subsidiary's) obligations.

     (C)  Any concession or time being given to the Borrower (or, as the case
          may be, the relevant Restricted Subsidiary).

     (D)  The winding-up or re-organisation of the Borrower (or, as the case may
          be, the relevant Restricted Subsidiary).
<PAGE>

     (E)  Any change in the condition, nature or status of the Borrower (or, as
          the case may be, the relevant Restricted Subsidiary).

     (F)  Any of the above events occurring in relation to another Guarantor or
          any other guarantor or provider of Security or its obligations.

     (G)  Any failure to take, retain or enforce any other guarantee or
          Security.

     (H)  Any circumstances affecting or preventing recovery of amounts due by
          the Borrower.

     (I)  Any other matter which might discharge a Guarantor.

     Any receipt from any person other than a Guarantor will reduce the
     outstanding balance only to the extent of the amount received.

15.7 REPRESENTATIONS OF A GUARANTOR

     Each Guarantor confirms that it does not have the benefit of any Security
     in respect of this guarantee or the indemnity in Clause 16.

15.8 COVENANTS OF A GUARANTOR
     Each Guarantor agrees as follows:

     (A)  SECURITY: It will not have the benefit of any Security in respect of
          this guarantee or the indemnity in Clause 16.

     (B)  EXERCISE OF RIGHTS: It will not, for so long as a Termination Event or
          Potential Termination Event has occurred and is outstanding:

          (i)   take the benefit of any right against the Borrower (or, as the
                case may be, the relevant Restricted Subsidiary) or any other
                person in respect of amounts paid under this guarantee; or

          (ii)  claim or exercise against the Borrower (or, as the case may be,
                the relevant Restricted Subsidiary) any right to any payment
                (whether or not connection with this Agreement).

     (C)  COMPETING PROOF: An Instructing Group may request a Guarantor to
          submit a proof for amounts due to it by the Borrower or any other
          guarantor. Each Guarantor agrees to submit a proof promptly in
          accordance with this request if it is entitled to do so. All amounts
          received in respect of this proof will be held by that Guarantor on
          trust for the Agent and the Lenders.

     The obligations in this sub-clause will cease to have effect when all the
     Facilities have ceased to be available and there are no amounts outstanding
     under this Agreement.

15.9 SUSPENSE ACCOUNT

     Any amount received under this guarantee may be placed on suspense account
     (bearing interest at a commercial rate, which interest shall be credited to
     the account).  Suspense accounts may be held by the Agent or by a Lender.
     While the amounts are in the suspense account the Agent or any Lender may
     claim and recover amounts from the Borrower (or, as the case may be, the
     relevant Restricted Subsidiary), another Guarantor and any other guarantor
     as if the amount in the suspense account had not
<PAGE>

     been received. Amounts may be taken out of a suspense account by the person
     holding that account at any time for application against the amounts
     outstanding under this Agreement or return to the payer of such amounts.

15.10  DISCHARGE CONDITIONAL

     Any settlement with, or discharge of, a Guarantor will be subject to a
     condition. This condition is that the settlement or discharge will be set
     aside if any prior payment, or any other guarantee or security, is set
     aside, invalidated or reduced.  In this event each Guarantor agrees to
     reimburse each Lender and the Agent for the value of the payment, guarantee
     or security which is set aside, invalidated or reduced.

15.11  PRINCIPAL DEBTOR

     Each Guarantor agrees to pay any amount which is expressed to be due from
     the Borrower (or, as the case may be, the relevant Restricted Subsidiary)
     but which is not recoverable from a Guarantor as a guarantor.  Any amount
     due under this sub-clause will be recoverable from each Guarantor as though
     the obligation had been incurred by that Guarantor as sole or principal
     debtor, but otherwise on the same terms as the obligation was expressed to
     be incurred by the Borrower (or, as the case may be, the relevant
     Restricted Subsidiary). This sub-clause is in addition to each Guarantor's
     obligations as a guarantor. The payment by the Borrower (or, as the case
     may be, the relevant Restricted Subsidiary) or any Guarantor of any amount
     payable by virtue of this sub-clause will (subject to Clause 15.10)
     discharge pro tanto the obligations on each Guarantor to pay the amounts
     expressed to be payable by it under this sub-clause.

16.  GUARANTOR'S INDEMNITY

16.1 INDEMNITY

     This Clause applies if the Borrower fails to make a payment expressed to be
     due under this Agreement on the due date.  In this event each Guarantor
     agrees to reimburse the person entitled to the payment for the losses and
     expenses (including loss of profit) that person incurs, or will incur, as a
     result.  Each Guarantor also agrees to reimburse each Lender and the Agent
     for all losses and expenses arising from any obligations of the Borrower
     being or becoming void, invalid, illegal or unenforceable.

16.2 AMOUNT OF LOSS

     For the purposes of this Clause a Lender and the Agent will be treated as
     having suffered a loss equal to the amount expressed as being due to it by
     the Borrower, but which is unpaid (taking into account any amounts paid
     under Clause 15).  If this treatment is incorrect the Lender or the Agent
     will produce evidence of its loss.
<PAGE>

          PART VI : REPRESENTATIONS, COVENANTS AND TERMINATION EVENTS

17.  REPRESENTATIONS

17.1 REPRESENTATIONS

     Each Company confirms that each of the following is true as at the
     Amendment Date (subject, in the case of Clause 17.1(T), as stated in that
     Clause 17.1(T)):

     (A)  NATURE OF COMPANY: It is a company duly incorporated and validly
          existing under the laws of its country of incorporation.

     (B)  POWERS OF COMPANY: It has power to own its assets and conduct its
          business as currently conducted. It also has corporate power to sign
          and deliver those of the Financing Documents to which it is a party
          (and which it has signed and delivered) and to exercise its rights and
          perform its obligations under those of the Financing Documents to
          which it is a party.

     (C)  AUTHORISATIONS: The signature and delivery on its behalf of those of
          the Financing Documents to which it is a party (and which it has
          signed and delivered) and the exercise of its rights and the
          performance of its obligations under the Financing Documents have been
          duly authorised by it.

     (D)  BINDING OBLIGATIONS: This Agreement and the other Financing Documents
          to which it is a party have been (or, if executed after the Amendment
          Date, will be when executed) duly signed and delivered by it. Its
          obligations described in the Financing Documents to which it is a
          party are (or, if executed after the Amendment Date, will be when
          executed) its valid and binding obligations in accordance with their
          terms, subject to the reservations contained in paragraph 8 of the
          opinion of Slaughter and May (the form of which is set out in Schedule
          8) and in any legal opinion delivered under Clause 20.1(R)(i)(c).

     (E)  LEGALITY AND CONTRAVENTIONS: The signature and delivery on its behalf
          of the Financing Documents to which it is a party and the exercise of
          its rights and performance of its obligations under such Financing
          Documents and the creation of Security by it under the Charges (if
          applicable):

          (i)   are not prohibited by applicable law, regulation or order or by
                its constitutional documents;

          (ii)  do not require any approval, filing, registration or exemption
                (other than the perfection of the Security constituted by the
                Charges by means of registration at H.M. Land Registry, the Land
                Register, the Register of Sasines, Companies House and the Trade
                Marks Registry, or as disclosed in any legal opinion delivered
                under Clause 20.1(R)(i)(c); and

          (iii) are not prohibited by, and do not constitute an event of default
                under, and do not result in an obligation to create Security
                under, any document or arrangement to which it is a party and
                which is material in the context of this Agreement.

     (F)  RANKING OF OBLIGATIONS: Its obligations under the Financing Documents
          are secured by the Charges. The Charges will, when executed (and
          subject to the required registrations being made and to any Security
          permitted by
<PAGE>

          Clause 20.1(C)(ii) and (iii)), constitute a first priority security
          interest which is valid and enforceable over the assets referred to in
          the Charges, subject to the reservations (other than reservation 8(F))
          contained in paragraph 8 of the opinion of Slaughter and May (the form
          of which is set out in Schedule 8) and in any legal opinion delivered
          under Clause 20.1(R)(i)(c). Amounts due under this Agreement will, for
          security purposes, rank at least equally with amounts due under the
          Hedging Contracts and the Overdraft Facilities. No amounts have been
          repaid by the Borrower under the Subordinated Loan Agreement or the
          Inter-Company Loan Agreement, and no amounts are repayable until all
          amounts expressed to be owed under the Financing Documents, the
          Hedging Contracts and the Overdraft Facilities have been paid in full
          and the Facilities are no longer available.

     (G)  NO TERMINATION EVENT: No Termination Event or Potential Termination
          Event has occurred and is continuing and none will occur as a result
          of the exercise of its rights or the performance of its obligations
          under the Financing Documents.

     (H)  ACCOUNTS: The audited financial statements and the consolidated
          audited financial statements most recently delivered under Clause 18.1
          (including, as at the Amendment Date, those statements most recently
          delivered before the Amendment Date under the equivalent of the
          provision now set out in Clause 18.1) give a true and fair view of the
          results of each Company's operations and the financial position of the
          Group taken as a whole, the Borrower's Group taken as a whole and the
          Borrower's Restricted Group taken as a whole. These financial
          statements were prepared in accordance with Generally Accepted
          Accounting Principles consistently applied except to the extent that
          the accompanying notes provide a description of a different treatment.

     (I)  LITIGATION: There exists no litigation which is reasonably likely to
          have an unfavorable outcome materially adversely affecting (in the
          case of the Borrower) its ability to perform its obligations under the
          Financing Documents or (in the case of any other Company) the
          Guarantors' ability (taken as a whole) to perform the Guarantors'
          obligations under the Financing Documents or, in the case of the
          Borrower, its ability to perform its material obligations under each
          of the Transmission Agreements.

     (J)  SECURITY: No Security exists over any of its assets, except as
          permitted by Clause 20.1(C).

     (K)  REPRESENTATIONS IN THE CHARGES: The representations given by it in the
          Charges are true as at the time they are made and repeated.

     (L)  DTT TRANSMISSION AGREEMENTS: The Borrower has complied with the
          licences conferred on it to which reference is made in the BBC DTT
          Transmission Agreement and the ONDIGITAL DTT Transmission Agreement.
          If there is a breach of any of these licences, but that breach is
          capable of remedy and that licence has not been terminated or revoked,
          there will not be a breach of this paragraph.

     Each Guarantor confirms that the following is true:

     (M)  GUARANTEEING POWERS: It has the power to guarantee the whole of the
          sums available under this Agreement and enter into the Charges. The
          borrowing of the full amount available under this Agreement does not
          contravene or exceed any guaranteeing limitation on it (or its
          directors) under its constitutional
<PAGE>

          documents or any other document to which it is a party and which is
          material in the context of this Agreement.

     Each of the Borrower and the Parent confirms that each of the following is
     true:

     (N)  BORROWING POWERS: The Borrower has the power to borrow the whole of
          the sums available under this Agreement. The borrowing of the full
          amount available under this Agreement does not contravene or exceed
          any borrowing limitation, and the entering into the Charges does not
          contravene any limitation on giving security, on it (or its directors)
          under its Memorandum and Articles of Association or any other document
          to which it is a party and which is material in the context of this
          Agreement.

     (O)  NO MATERIAL ADVERSE CHANGE:

          (i)   There has been no change in financial condition of the Borrower
                or (taken as a whole) the Guarantors having a material adverse
                impact on the Borrowers or (taken as a whole) the Guarantors'
                ability to perform its or their payment obligations under the
                Financing Documents since the last date as at which each of the
                covenants in Clause 19.2 were measured. The assessment of
                whether the change in financial condition is material will be
                measured against the covenants tested on that date.

          (ii)  In addition no event or circumstance has occurred and is
                continuing affecting the business or operations of the Borrower
                and (taken as a whole) the Guarantors and having a material
                adverse impact on the Borrower's or (taken as a whole) the
                Guarantors' ability to perform its or their payment obligations
                under the Financing Documents. The assessment of whether there
                has been a material adverse impact will be measured against the
                business or operations of the Borrower and (taken as a whole)
                the Parent and the Borrower's Group on the Amendment Date.

     (P)  AGREEMENTS EFFECTIVE: Each of the Shareholders' Agreement, the
          Transmission Agreements, the NTL Site Sharing Agreement, the Contract
          for Services, the Subordinated Loan Agreement and the Inter-Company
          Loan Agreement is in full force and effect, and the Bonds and any
          guarantees given by any person in respect of CT Finance's obligations
          under the Bonds are binding obligations.

     (Q)  LICENCES, ETC.: All licences, consents and authorisations necessary
          for the Borrower to conduct its business as currently conducted, and
          for the members of the Borrower's Restricted Group to conduct the
          other material businesses operated by the Borrower's Restricted Group
          (taken as a whole) as currently conducted, are in full force and
          effect.

     (R)  BORROWINGS: No member of the Borrower's Restricted Group has any
          Indebtedness for Borrowed Money, or has issued any guarantees,
          indemnities or other similar assurances, except as permitted under
          Clause 20.1(K) or as agreed by the Agent (acting on the instructions
          of an Instructing Group).

     (S)  TRANSMISSION AGREEMENTS REPRESENTATIONS: The representations given by
          the Borrower in each of the Transmission Agreements are true in all
          material respects as at the time they are made.
<PAGE>

     (T)  INFORMATION MEMORANDUM: As at the date of the Information Memorandum:

          (i)   the information incorporated in the Information Memorandum is
                true and correct in all material respects; and

          (ii)  no material information has been omitted and the financial
                projections contained in the Information Memorandum have been
                prepared on a reasonable basis using reasonable assumptions.

          In addition, no material adverse change has occurred in relation to
          the Borrower and (taken as a whole) the Parent and the Borrower's
          Group after the date of issue of the Information Memorandum which
          would require the Borrower, acting reasonably, to update the
          information contained in the Information Memorandum so as to ensure
          that this information remained true and correct in all material
          respects and that there were no material omissions or change in the
          assumptions used in the preparation of the financial projections in
          the Information Memorandum.

     The Borrower confirms that the following is true:

     (U)  FINANCIAL MODEL: The Financial Model has been prepared on a reasonable
          basis using reasonable assumptions and the Borrower does not have any
          reason to believe that it contains a misstatement material in the
          context of this Agreement.

     (V)  YEAR 2000:

          (i)   The Year 2000 Programme Report fairly describes in all material
                respects (with no material omissions) the investigations and
                actions which have been undertaken and performed by or on behalf
                of (taken as a whole) the Borrower's Restricted Group prior to
                the Amendment Date in relation to: (a) investigations as to
                whether its computer systems are able to handle date data
                relating to a date on or after 1st January, 2000; and (b) the
                actions taken or to be taken which are intended to ensure that
                such technology is able to handle such data.

          (ii)  On the basis of the investigations and actions mentioned in sub-
                paragraph (i) it believes that its business critical equipment
                and software (including as described in the Year 2000 Programme
                Report) and that of (taken as a whole) the Borrower's Restricted
                Group will be unaffected by the change in date caused by the
                beginning of the new millennium. This statement only applies to
                the extent that any disruption caused to the operations of
                Borrower or (taken as a whole) those the Borrower's Restricted
                Group is reasonably likely to have a material adverse effect on
                the Borrower or (taken as a whole) the Borrower's Restricted
                Group.

17.2 REPETITION

     All of the representations in Clause 17.1 except those in paragraphs (T),
     (U) and (V) will be deemed repeated on the making of each Advance and on
     the first day of each Interest Period.  The representations in paragraphs
     (T) and (U) will be deemed repeated on the date of the first Advance on or
     after the Amendment Date but not subsequently.  The representation in
     paragraph (V) will be deemed repeated on the making of each Advance which
     falls on or before 31st March, 2000.  Where a representation is deemed
     repeated this repetition will be with reference to the facts on that day.
<PAGE>

17.3 SURVIVAL OF REPRESENTATIONS

     Each of the representations made by the Borrower under this Agreement shall
     survive the making of each Advance (but are only repeated to the extent
     referred to in Clause 17.2).

17.4 LENDER REPRESENTATIONS

     Each Lender represents that each of the following is true:

     (A)  In respect of a payment of interest to that Lender, that Lender was,
          at the date the principal amount on which that interest accrued was
          advanced, a bank for the purposes of section 349(3) of the Income and
          Corporation Taxes Act 1988.

     (B)  In respect of a payment of interest to that Lender, the person
          beneficially entitled to that payment of interest at the time it is
          paid is within the charge to United Kingdom corporation tax in respect
          of that interest.

     The representations in this sub-clause do not apply where the
     representations would be untrue as a result of a change in law or Inland
     Revenue concession or a change in the interpretation or application of law
     or Inland Revenue concession.

18.  INFORMATION COVENANTS

18.1 PERIODIC REPORTS

     Each of the Borrower and the Parent agrees to deliver each of the following
     to the Agent as soon as they become available and, in any event, by the
     latest date indicated:

DOCUMENT/INFORMATION                                   Latest Date
- --------------------                                   -----------
(a)  Annual audited accounts of each              90 days after the end of that
     Company including profit and loss            financial year
     account, balance sheet and, in the case
     of the Borrower and the Parent, cash flow
     statement

(b)  Annual audited consolidated accounts of      90 days after the end of that
     the Borrower's Group, the Borrower's         financial year
     Restricted Group and of the Group,
     including profit and loss account, balance
     sheet and cash flow statement

(c)  Quarterly unaudited management               45 days after the end of each
     accounts of each Company certified to be     quarter of its financial year
     correct by the Certifying Financial Officer,
     including profit and loss account, balance
     sheet, cash flow statement and
     statement of capital expenditure
<PAGE>

(d)  Quarterly consolidated unaudited             45 days after the end of each
     management accounts of the Borrower's        quarter of its financial year
     Group, the Borrower's Restricted Group
     and of the Group certified to be correct
     by the Certifying Financial Officer,
     including profit and loss account, balance
     sheet, cash flow statement and
     statement of capital expenditure

(e)  Monthly management accounts of each          30 days after the end of each
     Company certified to be correct by the       calendar month
     Certifying Financial Officer, including
     profit and loss account, balance sheet,
     cash flow statement and statement of
     capital expenditure

(f)  Monthly consolidated management              30 days after the end of each
     accounts of the Borrower's Group, the        calendar month
     Borrower's Restricted Group and of the
     Group certified to be correct by the
     Certifying Financial Officer, including
     profit and loss account, balance sheet,
     cash flow statement and statement of
     capital expenditure (distinguishing
     between capital expenditure which is
     financed from operating income and
     capital expenditure which is funded from
     new equity or borrowing)

(g)  A certificate, signed by the Certifying      At the time of delivery of the
     Financial Officer stating:                   Borrower's Group's and
                                                  Borrower's Restricted Group's
     (i)  the amount of Financial                 quarterly financial statements
          Indebtedness on the last day of         delivered under paragraph (d)
          the Quarter

     (ii) EBITDA for that Quarter

(h)  Annual budget for the Borrower's Group       60 days after the start of
     and the Borrower's Restricted Group          each of its financial years
     including projected profit and loss
     account, balance sheet, cash flow
     statement and statement of capital
     expenditure (distinguishing between
     capital expenditure which is to be
     financed from operating income and
     capital expenditure which is to be funded
     from new equity or borrowing)

(i)  Annual budget for the Parent adopted by      60 days after the start of
     the Board of Directors of the Parent         each of its financial years
<PAGE>

(j)  A certificate regarding compliance with      At the time of delivery of
     the financial covenants in Clause 19.2       each set of the Borrower's
     setting out the necessary computations.      Group's and Borrower's
     This certificate is to be signed by the      Restricted Group's quarterly
     Certifying Financial Officer                 financial statements delivered
                                                  under  paragraph (d)

(k)  A certificate regarding:                     At the time of delivery of
                                                  each  set of annual
     (i)   compliance with the financial          consolidated financial
           covenants in Clause 19.2;              statements for the Borrower's
                                                  Group and Borrower's
     (ii)  the amount of Excess Cash              Restricted Group's delivered
           Flow; and                              under paragraph (b)

     (iii) the amount of capital expenditure
           in that financial year
           (distinguishing between capital
           expenditure which is financed
           from operating income and
           capital expenditure which is
           funded from new equity or
           borrowing)

     setting out the necessary computations.
     This certificate is to be signed by the
     Certifying Financial Officer

(l)  A statement signed by the auditors of the    At the time of delivery of
     Borrower regarding:                          each set of annual
                                                  consolidated financial
     (i)  compliance with the financial           statements for the Borrower's
          covenants in Clause 19.2; and           Group and Borrower's
                                                  Restricted Group's delivered
                                                  under paragraph (b)
     (ii) the amount of Excess Cash Flow

(m)  A certificate of Net Disposal Proceeds,      At the time of delivery of
     setting out the necessary computations.      each set of monthly management
     This certificate is to be signed by the      accounts under paragraph (e)
     Certifying Financial Officer

(n)  A certificate of acquisition price, setting  At the time of delivery of
     out the necessary computations.  This        each set of monthly management
     certificate is to be signed by the           accounts under paragraph (e)
     Certifying Financial Officer

(o)  Details of any treasury transaction as       At the time of delivery of
     required by Clause 20.1(O)                   each set of monthly management
                                                  accounts under paragraph (e)

(p)  A certificate setting out details of any     At the time of delivery of
     contract which is a Material Contract        each set of annual audited
     because it is a contract generating 10%      accounts of the Borrower
     or more of the Borrower's gross              under paragraph (a)
     revenues.  This certificate is to be signed
     by the Certifying Financial Officer
<PAGE>

(q)  A certificate setting out details of the     At the time of delivery of the
     extent to which (i) the Total Annual         Borrower's Restricted Group's
     Investment Limit and (ii) the Unrestricted   quarterly financial statements
     Entities Investment Limit have been          delivered under paragraph (d)
     utilised in respect of the current financial
     year (but taking account of Investment
     Amounts in previous financial years if
     relevant to the calculation).  This
     certificate is to be signed by the
     Certifying Financial Officer

(r)  A certificate setting out the confirmation   At the time of delivery of
     required in Clause 5.3(F)(ii).  This         each set of monthly management
     certificate is to be signed by the           accounts under paragraph (e).
     Certifying Financial Officer.

     In each case the Borrower and the Parent agree to deliver the number of
     copies requested by the Agent.

     The obligations to deliver the documents described in paragraphs (c), (d),
     (e), (f) and (i) above, insofar as they relate to the Parent or the Group
     (other than the Borrower's Group), do not apply if, in the period to which
     those documents relate (or would relate if they existed), (i) all of the
     Parent's Subsidiaries are members of the Borrower's Group and (ii) the
     Parent has no business other than that of holding shares in the Borrower.
     The obligations to deliver the documents described in paragraphs (b), (d),
     (f) and (h) above, in so far as they relate to the Borrower's Restricted
     Group, do not apply if, in the period to which those documents relate (or
     would relate if they existed) the composition of the Borrower's Restricted
     Group is identical to the composition of the Borrower's Group.

18.2 GAAP

     The Borrower confirms and agrees that all financial statements to which
     Clause 18.1 applies will be prepared in accordance with applicable law and
     Generally Accepted Accounting Principles consistently applied except to the
     extent that the accompanying notes provide a description of a different
     treatment.

18.3 REQUESTS

     The Agent may request any Company to deliver to the Agent information about
     it or its assets, business or financial condition or any other matter.
     Each Company agrees to deliver promptly to the Agent the information
     reasonably requested.  No Company will be obliged to deliver any
     information under this sub-clause if that delivery is prohibited by law or
     by direction of H.M. Government.

18.4 TERMINATION EVENTS AND OTHER EVENTS
     The Borrower agrees to notify the Agent promptly of:

     (A)  the occurrence of a Termination Event or Potential Termination Event
          upon becoming aware of such occurrence;

     (B)  any events or developments that would be reasonably likely to result
          in the termination of, or any material amendment to, any of the
          Transmission

<PAGE>

          Agreements or any material licence, consent or authorisation required
          for the purposes of its business, upon becoming aware of the same;

     (C)  any proposal to amend or waive any Material Contract (save for minor
          amendments); and

     (D)  the occurrence of any event of default or put event under the Bonds
          upon becoming aware of such occurrence.

18.5 OTHER INFORMATION

     Each of the Parent and the Borrower agrees to deliver to the Agent (to the
     extent not already delivered under this Agreement):

     (A)  all information provided to any shareholder in the Parent in its
          capacity as such;

     (B)  all information provided to any holder of the Bonds in its capacity as
          such;

     (C)  a certified copy of any agreement amending the NTL Site Sharing
          Agreement to accommodate the DTT transmission network.

     (D)  any press releases made by or on behalf of the Borrower or the Parent;
          and

     (E)  a quarterly update to the Year 2000 Programme Report from the date of
          this Agreement to 31st March, 2000 and, in any event, a copy of all
          updates and amendments that are issued to the Year 2000 Programme
          Report.

18.6 CHANGE OF ACCOUNTING TREATMENT

     (A)  This sub-clause applies if there is a change in the manner in which
          the financial statements of a Company or of the Group are prepared or
          in the accounting principles or standards applied in the preparation
          of those accounts.

     (B)  If this sub-clause applies or will apply the Borrower agrees to notify
          the Agent. The Borrower and the Agent will then negotiate in good
          faith with a view to making any necessary changes to this Agreement to
          reflect the change described in paragraph (A). Neither party is bound
          to continue the negotiations after the date 30 days after the Agent
          receives the Borrower's notice.

     (C)  If this sub-clause applies, and agreement is not reached under
          paragraph (B) above, the Borrower agrees to deliver, with each set of
          financial statements delivered to the Agent, a reconciliation (audited
          in the case of audited financial statements). This reconciliation will
          show the amounts utilised for the purposes of computations required
          for the purposes of this Agreement as they would have been if no
          change had occurred. The amounts in this reconciliation will then be
          used for computations required for the purposes of this Agreement
          instead of the corresponding amounts in the financial statements
          delivered under Clause 18.1.

19.  FINANCIAL COVENANTS

19.1 DEFINITIONS

     (A)  In this Agreement:
<PAGE>

          "BORROWER'S RESTRICTED GROUP" means:

          (i)   if the Borrower has no Restricted Subsidiaries, the Borrower;
                and

          (ii)  if the Borrower has Restricted Subsidiaries, the Borrower and
                its Restricted Subsidiaries taken as a whole.

          "CASH FLOW" for a period means the aggregate of EBITDA for that
          period:

          (i)   minus any capital expenditure;

          (ii)  minus advance corporation tax, mainstream corporation tax and
                withholding tax and their equivalent in any relevant
                jurisdiction actually paid or falling due for payment during
                that period (but excluding any amount paid in that period which
                was included in the Cash Flow computation for a previous period
                because it fell due in that previous period);

          (iii) plus the amount of any tax rebate or credit in respect of any
                advance corporation tax, mainstream corporation tax or
                withholding tax and their equivalent in any relevant
                jurisdiction actually received in cash by any member of the
                Borrower's Restricted Group during the period;

          (iv)  plus Net Disposal Proceeds (but excluding for this purpose the
                non-cash consideration adjustment referred to in the last
                sentence of the definition of "Net Disposal Proceeds");

          (v)   plus the amount paid up or credited as paid during the period
                (including share premium) on issued share capital of the
                Borrower;

          (vi)  plus non-cash stock and share option charges;

          (vii) plus or minus any decrease or increase in working capital
                during the period.

          "DEBT COVERAGE" for a period means the ratio of Financial Indebtedness
          at the end of that period to EBITDA for that period.  For this purpose
          any amounts outstanding drawn to finance the Borrower's working
          capital requirements (up to an aggregate maximum of (Pounds)10,000,000
          or its Equivalent Amount (if drawn in an Optional Currency)) will, to
          the extent otherwise included, be deducted from Financial
          Indebtedness.

          "EBITDA" for any period means the profit of the Borrower's Restricted
          Group for that period:

          (i)   before taking into account all Extraordinary Items (whether
                positive or negative) but after taking into account all
                Exceptional Items (whether positive or negative);

          (ii)  before deducting tax, including advance corporation tax,
                mainstream corporation tax and their equivalents in any relevant
                jurisdiction;

          (iii) before deducting amortisation of any goodwill and any costs
                incurred in relation to acquisitions (to the extent that these
                are expensed);

          (iv)  before taking into account Net Cash Interest accrued during that
                period, whether or not paid, deferred or capitalised (before
                taking into account financing costs in relation to Financial
                Reporting Standard 4 (Capital Instruments))during that period;
<PAGE>

          (v)   before taking into account amortisation of financing costs
                calculated in accordance with Financial Reporting Standard 4
                (Capital Instruments) during that period;

          (vi)  after deducting any gain, and adding back any loss, relative to
                book value arising on the sale, lease or other disposal of any
                asset during that period and after deducting any gain, and
                adding back any loss, arising on revaluation of any asset during
                that period, in each case to the extent that it would otherwise
                be taken into account;

          (vii)  before deducting depreciation;

          (viii)  before deducting non-cash stock and share option charges.

          "EXCEPTIONAL ITEMS" has the meaning given to it in FRS 3 issued by the
          Accounting Standards Board, but excluding any Extraordinary Items.

          "EXTRAORDINARY ITEMS" has the meaning given to it in FRS 3 issued by
          the Accounting Standards Board, and includes those items listed in
          paragraph 20 thereof.

          "FINANCIAL INDEBTEDNESS" on any date means the amount of Indebtedness
          for Borrowed Money of the Borrower's Restricted Group on that date.
          For this purpose:

          (i)   any amounts under paragraph (E) of the definition of
                "Indebtedness for Borrowed Money" in Clause 1.1 will be
                excluded;

          (ii)  only the principal element of obligations (accounted for as such
                in accordance with Generally Accepted Accounting Principles) in
                respect of any finance lease to which a member of the Borrower's
                Restricted Group is a party as lessee will be taken into account
                under paragraph (F) of that definition;

          (iii) no amount of Interest will be included; and

          (iv)  no amount outstanding under the Subordinated Loan Agreement will
                be included.

          "FIXED CHARGE COVERAGE RATIO" for a period means the ratio of Cash
          Flow for that period to Fixed Charges for that period.

          "FIXED CHARGES" for a period means the aggregate of Total Interest
          Payable for that period:

          (i)   plus the amount of any commitment fees and of all other fees
                payable under this Agreement during such period;

          (ii)  plus, after the Conversion Date, the amount of any repayment
                instalment under Facility A which fell due during that period or
                which would have fallen due during that period had there not
                been a prepayment made pursuant to Clause 10.1;

          (iii) plus all amounts outstanding under the Overdraft Facilities at
                the end of that period;

          (iv)  plus all scheduled principal repayments of finance lease
                obligations which fell due for payment during that period;
<PAGE>

          (v)   plus all obligations in respect of principal and fees (other
                than upfront or other non-recurring fees) under any agreement
                falling within paragraph (A) of the definition of Indebtedness
                for Borrowed Money falling due during such period (to the extent
                not otherwise taken into account) but excluding (for the
                avoidance of doubt) obligations in respect of such Indebtedness
                for Borrowed Money falling within paragraph (F) of such
                definition;

          (vi) plus all Extraordinary Items (whether positive or negative)
               falling due during such period.

          "INTEREST" means interest and amounts in the nature of interest.

          "NET CASH INTEREST" for any period means the Interest due and payable
          during that period as an obligation of any member of the Borrower's
          Restricted Group (whether or not paid or capitalised during or
          deferred (but to the extent that deferred Interest is included in Net
          Cash Interest in such period, any such deferred Interest shall not be
          included in the calculation of Net Cash Interest in the following
          period) for payment after such period), but adjusted to take account
          of:

          (i)   any amount (other than, in the case of currency hedging
                agreements or instruments, the original principal amount)
                receivable or payable during that period by any member of the
                Borrower's Restricted Group (after deducting all taxes
                applicable to that amount receivable) under interest rate or
                currency hedging agreements or instruments; and

          (ii)  any amount constituting Interest receivable during that period
                by any member of the Borrower's Restricted Group (after
                deducting all taxes applicable thereto) in respect of any
                investment, deposit or loan,

          in either case under which all parties are in compliance with their
          material obligations.

          "TOTAL INTEREST PAYABLE" for any period means the Interest due and
          payable during that period as an obligation of any member of the
          Borrower's Restricted Group (whether or not paid or capitalised during
          or deferred (but to the extent that deferred Interest is included in
          Total Interest Payable in such period, any such deferred Interest
          shall not be included in the calculation of Total Interest Payable in
          the following period) for payment after such period), adjusted to take
          account of any amount (other than, in the case of currency hedging
          agreements or instruments, the original principal amount) receivable
          or payable during that period by any member of the Borrower's
          Restricted Group (after deducting all taxes applicable to that amount
          receivable) under interest rate and/or currency hedging agreements or
          instruments under which all parties are in compliance with their
          material obligations.

     (B)  (i)   All the terms defined in paragraph (A) are to be determined in
                accordance with the Generally Accepted Accounting Principles and
                are to be computed from:

                (a) the financial statements of the Borrower (if the Borrower
                    has no Restricted Subsidiaries); or

                (b) the consolidated financial statements of the Borrower and
                    its Restricted Subsidiaries (if the Borrower has Restricted
                    Subsidiaries),

               in each case, delivered pursuant to Clause 18.1.
<PAGE>

          (ii)  For the purposes of Clause 19.1 no item shall be deducted or
                credited more than once in any calculation.

19.2 FINANCIAL COVENANTS

     The Borrower agrees to ensure that the following financial covenants are
     complied with:

     (A)  The ratio of EBITDA to Total Interest Payable, computed on the basis
          of the annualised EBITDA and annualised Total Interest Payable (in
          each case calculated by multiplying by two the figure which is the
          aggregate of EBITDA or, as the case may be, Total Interest Payable for
          the last two Quarters) as at the end of each Quarter, is not to be
          less than:

          Quarter ending                             Required Ratio
          --------------                             --------------
          30th September, 1999                       2.50:1
          31st December, 1999                        2.50:1
          31st March, 2000                           2.75:1
          30th June, 2000                            3.00:1
          30th September, 2000                       3.00:1
          31st December, 2000                        3.00:1
          31st March, 2001                           3.00:1
          30th June, 2001                            3.00:1
          30th September, 2001                       3.00:1
          31st December, 2001                        3.00:1
          31st March, 2002                           3.00:1
          30th June, 2002                            3.00:1
          Thereafter                                 3.50:1

     (B)  Debt Coverage computed on the basis of the annualised EBITDA
          (calculated by multiplying by two the figure which is the aggregate of
          EBITDA for the last two Quarters) and tested each Quarter (using the
          amount of Financial Indebtedness on that last day of that Quarter), is
          not to be more than:

          Quarter ending                             Required Ratio
          --------------                             --------------
          30th September, 1999                       5.25:1
          31st December, 1999                        5.25:1
          31st March, 2000                           5.25:1
          30th June, 2000                            4.75:1
          30th September, 2000                       4.50:1
          31st December, 2000                        4.50:1
          31st March, 2001                           4.00:1
          30th June, 2001                            3.75:1
          30th September, 2001                       3.75:1
          31st December, 2001                        3.75:1
          31st March, 2002                           3.50:1
          30th June, 2002                            3.50:1
          30th September, 2002                       3.50:1
          31st December, 2002                        3.50:1
          Thereafter                                 3.00:1

     (C)  The Fixed Charge Coverage Ratio, computed on the basis of the
          annualised Cash Flow and the annualised Fixed Charges (in each case
          calculated by multiplying by two the figure which is the aggregate of
          Cash Flow or, as the case may be, Fixed Charges for the last two
          Quarters) and tested each Quarter, is not
<PAGE>

          to be less than 1.75: 1. The Fixed Charge Coverage Ratio will first be
          tested in the Quarter ending 30th June, 2002 and subsequently will be
          tested in each succeeding Quarter.

20.  GENERAL COVENANTS

20.1 COVENANTS

     Each Company agrees that, unless otherwise agreed by the Agent (acting on
     the instructions of an Instructing Group):

     (A)  RANKING OF OBLIGATIONS: It will ensure that its obligations under this
          Agreement are at all times secured by the Charges to which it is a
          party.

     (B)  COMPLIANCE: It will exercise its rights and perform its obligations
          under the Financing Documents without contravention of applicable
          laws. If approvals are required to do this it will obtain and maintain
          them and will comply with their terms. It will also make any necessary
          filings in respect of the Financing Documents unless these are
          required to be, or are, made by another person.

     (C)  NEGATIVE PLEDGE: It will not create or allow to exist (and will
          procure that no Restricted Subsidiary creates or allows to exist) any
          Security over any of its assets. This prohibition does not, however,
          apply to the following:

          (i)   Security created by the Charges.

          (ii)  Liens or rights of set-off arising in the ordinary course of
                trading or by operation of law.

          (iii) Title retention or hire purchase arrangements in respect of
                goods. These arrangements must arise in the ordinary course of
                trading and on customary terms.

          The exceptions in sub-paragraphs (ii) and (iii) do not permit any
          Security to be created over the Borrower's rights under any of the
          Transmission Agreements.  This paragraph applies to the Parent to the
          extent only that it relates to the shares which the Parent holds in
          the Borrower.

(D)  DISPOSAL OF ASSETS:  It will not (and will procure that each Restricted
     Subsidiary will not) dispose of any of its assets.  This does not apply to
     disposals:
(i)  on an arm's length basis;
(ii) of obsolete or unused assets or as waste; or

(iii)  between the Borrower and any Restricted Subsidiary (which is a wholly-
owned member of the Borrower's Restricted Group) or between Restricted
Subsidiaries (each of which is a wholly-owned member of the Borrower's
Restricted Group).

          No disposal of any of the Borrower's rights under any of the
          Transmission Agreements may be made by virtue of any of sub-paragraphs
          (i), (ii) or (iii).  In addition, a disposal is only permitted under
          sub-paragraphs (i), (ii) or (iii) if the Borrower will be able to
          carry on the Analogue Transmission Business or the DTT Transmission
          Business substantially as before.  For this purpose the Agent
<PAGE>

          is entitled to rely on a certificate from the Borrower (signed by a
          Certifying Financial Officer) to this effect.

          For the purposes of this paragraph, the grant of a lease or licence
          (other than a lease or licence given as part of a site sharing
          arrangement in the ordinary course of business) is treated as a
          disposal.  Any disposal which would otherwise be permitted under sub-
          paragraph (iii) above is not permitted to the extent that each of the
          following applies:

          (a) the Net Disposal Proceeds of any disposal of that asset by the
              acquiror would not, by reason of applicable law, be capable of
              being made available to the Borrower for the purposes of making a
              Disposal Prepayment which would otherwise be payable under Clause
              10.2 as a result of that disposal by the acquiror; and

          (b) at the time of the original disposal to the acquiror any member of
              the Borrower's Restricted Group was aware or should have been
              aware that the Net Disposal Proceeds would not be available to the
              Borrower for the purpose of making that Disposal Prepayment.

          This paragraph does not apply to the Parent, who (subject to Clause
          20.1(AA) and Clause 20.1(BB)) may dispose of its assets as it sees
          fit.

     (E)  COMPLIANCE WITH LAWS: It will (and will procure that each Restricted
          Subsidiary will) comply with all applicable laws and regulations, and
          the terms of all permits, authorisations and licences. This paragraph
          includes, amongst other things, compliance with environmental laws,
          regulations, permits, authorisations and licences. If there is a
          breach of such a permit, authorisation or licence, but that breach is
          capable of remedy and the permit, authorisation or licence has not
          been terminated or revoked, there will not be a breach of this
          paragraph. This paragraph does not apply to the Parent.

     (F)  INSURANCE: It will (and will procure that each Restricted Subsidiary
          will) maintain insurance relating to its assets and activities against
          those risks and at those levels which are consistent with the
          insurance maintained by similar businesses. It also agrees to provide
          to the Agent evidence of all insurance arranged. This paragraph does
          not apply to the Parent.

     (G)  MAINTENANCE OF REPRESENTATIONS: It will take all steps necessary to
          ensure that those representations in Clause 17.1 which are deemed to
          be repeated by reason of clause 17.2 remain true and correct when so
          deemed to be repeated.

     (H)  AGREEMENTS WITH RELATED PARTIES: It will ensure that all agreements
          between it and any member of the Equity Consortium or any other
          shareholder of the Parent or any member of the Group are on an arm's
          length basis on commercial terms (other than agreements with the
          Borrower or wholly-owned Restricted Subsidiaries of the Borrower which
          have become Guarantors in accordance with Clause 20.1(R)). This
          paragraph does not apply to the Parent.

     (I)  ENFORCEMENT OF MATERIAL CONTRACTS: It will (and will procure that each
          Restricted Subsidiary will) ensure that all material rights under all
          Material Contracts are enforced in accordance with their terms. This
          paragraph does not apply to the Parent.
<PAGE>

     (J)  PERFORMANCE OF MATERIAL CONTRACTS: It will (and will procure that each
          Restricted Subsidiary will) perform its obligations under Material
          Contracts (including under any licences, roll-out or transmission
          system modification requirements or other performance covenants set
          out in any of them) in all material respects in accordance with their
          terms. Defaults:

          (i)    under any Transmission Agreement giving rise to charges of
                 service credits under that Transmission Agreement of less than
                 (Pounds)500,000 in any financial year; or

          (ii)   under more than one Transmission Agreement giving rise to
                 service credits of less than (Pounds)1,500,000 in aggregate in
                 any financial year, and defaults under any licence which would
                 not be in breach of Clause 20.1(E) are to be treated as not
                 material. This paragraph does not apply to the Parent.

     (K)  BORROWINGS: It will not (and it will procure that each Restricted
          Subsidiary will not) have any Indebtedness for Borrowed Money, or
          issue any guarantees, indemnities or other similar assurances (each
          being for the purposes of this paragraph a "GUARANTEE"), except (at
          any time):

          (i)    amounts due under: (a) this Agreement; (b) the Overdraft
                 Facilities (as long as the amount outstanding does not exceed
                 (Pounds)5,000,000); and (c) the Hedging Contracts;

          (ii)   amounts due under finance leases where the aggregate principal
                 elements of obligations in respect of those leases does not
                 exceed (Pounds)3,500,000 in aggregate;

          (iii)  guarantees of the Borrower's obligations under this Agreement;

          (iv)   amounts borrowed by the Borrower or a Restricted Subsidiary
                 (which is a wholly-owned member of the Borrower's Restricted
                 Group) from a Restricted Subsidiary (which is a wholly-owned
                 member of the Borrower's Restricted Group) or from the
                 Borrower;

          (v)    guarantees by the Borrower or a Restricted Subsidiary (which is
                 a wholly-owned member of the Borrower's Restricted Group) of
                 obligations (which are not prohibited by the terms of the
                 Financing Documents) of a Restricted Subsidiary (which is a
                 wholly-owned member of the Borrower's Restricted Group) or the
                 Borrower;

          (vi)   amounts due in respect of finance provided by suppliers of
                 goods and services in the ordinary course of business and not
                 exceeding (Pounds)1,000,000 in aggregate;

          (vii)  amounts due from the Borrower to the Parent under the
                 Subordinated Loan Agreement;

          (viii) amounts due from the Borrower to CT Finance under the Inter-
                 Company Loan Agreement;

          (ix)   guarantees of CT Finance's obligations under the Bonds. This
                 applies to guarantees relating to the first issue of bonds
                 under the Bonds. It does not apply to guarantees relating to
                 any issue of further or other bonds;

          (x)    guarantees of amounts not exceeding (Pounds)500,000 in
                 aggregate;
<PAGE>

          (xi)   Indebtedness for Borrowed Money incurred by, provided by or
                 otherwise made available by the Borrower's Restricted Group in
                 relation to Unrestricted Entities so long as the aggregate
                 amount of Indebtedness for Borrowed Money incurred by, provided
                 by or otherwise made by the Borrower's Restricted Group and
                 outstanding at such time in relation to Unrestricted Entities
                 does not exceed the Unrestricted Entities Investment Limit when
                 aggregated with any other Investment Amounts which have been
                 previously incurred by, provided by or otherwise made available
                 by members of the Borrower's Restricted Group after the
                 Amendment Date in relation to Unrestricted Entities and which
                 (in the case of Indebtedness for Borrowed Money) are
                 outstanding at such time; and

          (xii)  other borrowings not exceeding (Pounds)5,000,000 in aggregate.
                 This paragraph does not apply to the Parent, who may have
                 Indebtedness for Borrowed Money, or issue guarantees, as it
                 sees fit.

     (L)  ACQUISITIONS AND JOINT VENTURES:

          (i)    It will not (and will procure that any Restricted Subsidiary
                 will not):

                 (a) acquire any business; or

                 (b) make any investment in any company; or

                 (c) enter into any joint venture or any joint venture agreement
                     or arrangement where, in any case, it has any obligation to
                     lend to, guarantee, transfer assets to or otherwise fund or
                     incur any liability in respect of this joint venture or to
                     acquire any shares in or assets of this joint venture,

               (each a "FURTHER ACQUISITION") unless each of the conditions set
               out in sub-paragraphs (ii), (iii), (iv) and (v) are satisfied.

          (ii)   The Further Acquisition must involve a business related to that
                 of the Borrower.

          (iii)  The consideration for the Further Acquisition:

                 (a) when aggregated with all other Investment Amounts incurred
                     by, provided by or otherwise made by members of the
                     Borrower's Restricted Group in that financial year, must
                     not exceed the Total Annual Investment Limit; and

                 (b) when aggregated with all other Investment Amounts incurred
                     by, provided by, or otherwise made available by members of
                     the Borrower's Restricted Group in relation to Unrestricted
                     Entities in the current or any previous financial years
                     (but after the Amendment Date) and which (in the case of
                     Indebtedness for Borrowed Money) are outstanding at such
                     time, must not exceed the Unrestricted Entities Investment
                     Limit.

          (iv)   The Agent must have been provided with any information
                 (financial or otherwise) in relation to the Further Acquisition
                 as it may reasonably request.

          (v)    The Certifying Financial Officer must confirm in writing to the
                 Agent that, to the best of his knowledge having made all
                 reasonable enquiries and
<PAGE>

                 without personal liability, the Further Acquisition will not
                 result in it failing to comply with any of its obligations
                 under Clause 19.2 at all times during the next four full
                 Quarters following the date on which the Further Acquisition
                 takes place.

          (vi)   In addition, this paragraph (L) will not apply:

                 (a) after the date on which the annualised Debt Coverage is
                     first established to be not more than 3:1 for two
                     successive Quarters; and

                 (b) for so long as the annualised Debt Coverage remains at no
                     more than 3:1. Annualised Debt Coverage will be calculated
                     as set out in Clause 8.8.

          This paragraph does not apply to the Parent, who may acquire
          businesses or make investments in companies as it sees fit.

     (M)  INVESTMENTS: It will not (and will procure that each Restricted
          Subsidiary will not) invest any surplus cash other than in cash
          deposits with UK clearing banks or in cash equivalent investments. For
          the purpose of this paragraph "CASH EQUIVALENT INVESTMENTS" means
          investments in:

          (i)    marketable obligations of or guaranteed by any of the United
                 Kingdom, the Republic of France or the United States of America
                 or issued by an agency of any of them and backed by any of the
                 same;

          (ii)   certificates of deposit, notes and acceptances issued by banks
                 which are authorised institutions under the Banking Act 1987 or
                 which are European authorised institutions under the Banking
                 Coordination (Second Council Directive) Regulations 1992 and
                 which are entitled to accept deposits in the United Kingdom or
                 by building societies under the Building Societies Act 1986, so
                 long as such bank or building society's long term senior debt
                 immediately prior to the making of such an investment is rated
                 not less than A- by Standard & Poor's Corporation or not less
                 than A3 by Moody's Investors Services Inc., or (where a bank or
                 building society is rated by both Standard & Poor's Corporation
                 and by Moody's Investors Services Inc.) is rated not less than
                 A- by Standard & Poor's Corporation and not less than A3 by
                 Moody's Investors Services Inc.;

          (iii)  commercial paper with not more than 187 days to maturity
                 provided that immediately prior to the making of such an
                 investment the issuer (or guarantor) of the commercial paper is
                 rated for short term obligations not less than A1 by Standard &
                 Poor's Corporation or not less than P1 by Moody's Investors
                 Services, Inc., or (where a bank or building society is rated
                 by both Standard & Poor's Corporation and by Moody's Investors
                 Services Inc.) is rated not less than A1 by Standard & Poor's
                 Corporation and not less than P1 by Moody's Investors Services
                 Inc.; or

          (iv)   any Indebtedness for Borrowed Money issued by persons with a
                 rating of A+ or higher by Standard & Poor's Corporation or A1
                 or higher by Moody's Investors Services Inc.,

          provided that any investment made pursuant to sub-paragraphs (ii),
          (iii) and (iv) above in or guaranteed by a single bank, building
          society or other body
<PAGE>

          corporate in excess of (Pounds)2,500,000 shall not be permitted. This
          paragraph does not apply to the Parent.

     (N)  LOANS: It will not (and will procure that each Restricted Subsidiary
          will not) provide loans or other credit, other than:

          (i)    normal trade credit;

          (ii)   loans not exceeding (Pounds)500,000 in aggregate;

          (iii)  loans to the Borrower or a Restricted Subsidiary (which is a
                 wholly-owned member of the Borrower's Restricted Group)
                 permitted by Clause 20.1(K); and

          (iv)   loans or other credit which, when aggregated with all other
                 Investment Amounts incurred by, provided by, or otherwise made
                 available by members of the Borrower's Restricted Group and
                 which (in the case of Indebtedness for Borrowed Money) are
                 outstanding at such time, do not exceed either:

                 (a) in respect of Investment Amounts which are incurred by,
                     provided by, or otherwise made available by members of the
                     Borrower's Restricted Group in the current financial year,
                     the Total Annual Investment Limit applicable to this
                     financial year; or

               (b)   in respect of Investment Amounts which are (1) incurred by,
                     provided by, or otherwise made available by members of the
                     Borrower's Restricted Group in the current or any previous
                     financial years (but after the Amendment Date) and (2)
                     relate to loans or other credit made available to
                     Unrestricted Entities, the Unrestricted Entities Investment
                     Limit.

          This paragraph does not apply to the Parent, who may provide loans or
          other credit as it sees fit.

     (O)  TREASURY TRANSACTIONS: It will not (and will procure that each
          Restricted Subsidiary will not) enter into any interest rate swap,
          cap, ceiling, collar or floor or any swap, future or option in
          relation to currency or equity or any commodity contract or option (in
          any of these cases, whether over the counter or exchange traded) or
          any similar treasury transaction, other than:

          (i)    in the case of the Borrower, the Hedging Contracts;

          (ii)   spot foreign exchange contracts entered into in the ordinary
                 course of business (other than for speculative purposes); and

          (iii)  the hedging of actual or projected foreign exchange exposures
                 arising in the ordinary course of its business.

          Where a Company enters into one of the transactions permitted by sub-
          paragraphs (ii) or (iii) it will provide details of that transaction
          to the Agent at the time of delivery of each set of monthly management
          accounts under Clause 18.1(e) to the extent that such details have not
          been previously provided to the Agent.  No details need be provided,
          however, of any transaction involving a notional or actual principal
          amount of less than (Pounds)10,000,000.

          This paragraph does not apply to the Parent, who may enter into
          treasury transactions as it sees fit.
<PAGE>

     The Borrower agrees that, unless otherwise agreed by the Agent (acting on
     the instructions of an Instructing Group):

     (P)  CARRY ON BUSINESS: It will carry on the Analogue Transmission Business
          and the DTT Transmission Business. These businesses will be conducted
          in accordance with applicable law.

     (Q)  INTELLECTUAL PROPERTY: It will maintain all material intellectual
          property rights required for the purpose of the Analogue Transmission
          Business, the DTT Transmission Business or any other material business
          conducted by it in all appropriate jurisdictions.

     (R)  SUBSIDIARIES:

          (i)    It will ensure that each of its Subsidiaries becomes a
                 guarantor of amounts due under this Agreement unless it is
                 designated an Unrestricted Subsidiary in accordance with sub-
                 paragraph (ii) or unless sub-paragraph (v) applies. When a
                 company is required to be a Guarantor for the purposes of this
                 paragraph the Borrower agrees to ensure that:

                 (a) that company duly executes and delivers an Additional
                     Guarantor Agreement substantially in the form set out in
                     Schedule 6 (and for this purpose the Borrower is authorised
                     to execute the Additional Guarantor Agreement on behalf of
                     each Company);

                 (b) that company duly executes a document of a type described
                     in paragraphs (C) or (D) of the definition of "Charges" in
                     Clause 1.1; and

                 (c) there is delivered to the Agent evidence reasonably
                     satisfactory to the Agent that the Additional Guarantor
                     Agreement and the document referred to in sub-paragraph (b)
                     above are valid and binding on that Company and (in the
                     case of the document referred to in sub-paragraph (b)
                     above) creates first ranking security (subject to Security
                     permitted under Clause 20.1(C)(ii) and (iii)). This
                     evidence may include items equivalent to those described in
                     paragraphs 4, 5 and 6 of Schedule 3.

                 Each of the requirements in sub-paragraphs (a), (b) and (c)
                 above must be satisfied within 30 days of a company becoming a
                 Subsidiary of the Borrower. The obligations contained in this
                 paragraph do not apply to:

                 (1)  CT Finance (which shall be deemed to be an Unrestricted
                      Subsidiary with effect from the Amendment Date); or

                 (2)  any Subsidiary of the Borrower whose sole business is to
                      hold and administer pension funds on behalf of the
                      employees of companies in the Group; or

                 (3)  any Subsidiary which is designated an Unrestricted
                      Subsidiary in accordance with sub-paragraph (ii) or in
                      relation to which sub-paragraph (v) applies.

          (ii)   Where a Further Acquisition which is permitted under Clause
                 20.1(L) involves the acquisition of, or subscription for shares
                 in, a company (a
<PAGE>

                 "NEW COMPANY") which owns, or is established for the purpose of
                 owning, the business to be acquired or invested in, the
                 Borrower will:

                 (a) have the right, if the New Company is a Subsidiary (a "NEW
                     SUBSIDIARY"), to designate the New Subsidiary as an
                     "UNRESTRICTED SUBSIDIARY" or to apply to the Agent under
                     sub-paragraph (v); and

                 (b) upon the acquisition of, or subscription for, the shares of
                     the New Company by it or by any Restricted Subsidiary to
                     which sub-paragraph (v) does not apply, grant, or procure
                     the granting of, a first equitable charge in respect of
                     such shares in favour of the Agent but provided that the
                     Lenders' rights under the equitable charge are subject to
                     any pre-emption rights granted by the relevant member of
                     the Borrower's Restricted Group under any joint venture
                     agreement entered into in connection with the acquisition
                     of, or subscription for, shares in the New Company so long
                     as these pre-emption rights provide for the transfer of the
                     shares to which they relate at fair market value. In such
                     circumstances, the Borrower will not be required to ensure
                     the execution and delivery of the documents and evidence
                     referred to in sub-paragraphs (i)(a),(b) and (c).

          (iii)  It will ensure that any Unrestricted Subsidiary does not at any
                 time grant to any third party a fixed or floating charge over
                 any assets or property which it shares with or which is owned
                 or used by or in connection with the business of any member of
                 the Borrower's Restricted Group except with the prior written
                 consent of the Agent.

          (iv)   At any time subsequent to an acquisition of an Unrestricted
                 Subsidiary the Borrower may elect to designate a New Subsidiary
                 as a "RESTRICTED SUBSIDIARY", which designation will take
                 effect upon all the documents and evidence referred to in sub-
                 paragraphs (i)(a), (b) and (c) being delivered to the Agent in
                 a form satisfactory to the Agent.

          (v)    This sub-paragraph (v) applies where:

                 (a)  the Borrower or a Restricted Subsidiary is proposing to
                      acquire, or subscribe for, shares in a company which upon
                      the proposed acquisition or subscription taking place
                      would become a Subsidiary of the Borrower or a Restricted
                      Subsidiary; and

                 (b)  the Borrower demonstrates to the satisfaction of the Agent
                      that it would be impossible or highly impracticable
                      (having regard to the value of any security or guarantees
                      otherwise required to be provided to the Agent) for the
                      proposed Subsidiary to execute and deliver either or both
                      of the documents referred to in Clause 20.1(R)(i)(a) and
                      (b) and/or comply with the requirement set out in Clause
                      20.1(Z).

                 In this event, the Agent will permit the proposed Subsidiary,
                 on becoming a Subsidiary, to be designated a "RESTRICTED
                 SUBSIDIARY" notwithstanding that this proposed Subsidiary will
                 not comply with the requirements set out in Clause
                 20.1(R)(i)(a), (b) and (c) and/or set out in Clause 20.1(Z).

                 The Borrower will provide:
<PAGE>

                 (1) legal opinions (in a form and content satisfactory to the
                     Agent) which explain why satisfying the requirements set
                     out in Clause 20.1(R)(i)(a), (b) and/or (c) and/or Clause
                     20.1(Z) are impossible or highly impracticable.

                 (2) any information (financial or otherwise) in relation to the
                     proposed Subsidiary as the Agent may reasonably request.

                 (3) a certificate of the Certifying Financial Officer
                     confirming that, to the best of his knowledge having made
                     all reasonable enquiries and without personal liability,
                     the investment in the proposed Subsidiary will not result
                     in it failing to comply with any of its obligations under
                     Clause 19.2 at all times during the next four full Quarters
                     following the date on which the proposed investment takes
                     place.

          (vi)   This sub-paragraph (vi) applies where:

                 (a) the Borrower notifies the Agent that it wishes a CCIC
                     Affiliate to be designated a "RESTRICTED SUBSIDIARY"; and

                 (b) the Borrower has ensured that this CCIC Affiliate has
                     provided the Agent with the documents and evidence set out
                     (and as specified in) in Clause 20.1(R)(i)(a), (b) and (c).

                 In this event, the Agent will permit that CCIC Affiliate to be
                 designated a "RESTRICTED SUBSIDIARY" and therefore a member of
                 the Borrower's Restricted Group and to be deemed to be a
                 wholly-owned member of the Borrower's Restricted Group, in each
                 case for the purpose of the Finance Documents.

     (S)  DISTRIBUTION: It will not make any Distribution, and it will not pay
          any amounts in respect of interest or principal under the Subordinated
          Loan Agreement.

     (T)  CHANGE OF BUSINESS: It will not change the nature of its business or,
          taken as a whole, that of its Subsidiaries.

     (U)  ACCOUNTING REFERENCE DATE: It will retain 31st December as its
          accounting reference date and will make no change to the duration of
          any of its financial years.

     (V)  BONDS:  It will procure that:

          (i)    (save for the correction of typographical inconsistencies or
                 manifest errors) the terms and conditions of the Bonds are not
                 amended or waived in any way at the request of CT Finance (or
                 any other member of the Group); and

          (ii)   CT Finance's obligations under the Bonds are not defeased to
                 any other person, and no other person is substituted for or
                 assumes the obligations of CT Finance in respect of the Bonds.

     (W)  CT FINANCE AS SUBSIDIARY:  It will ensure that CT Finance remains its
          wholly-owned Subsidiary.

     (X)  INTER-COMPANY LOAN AGREEMENT:  It will procure that:
<PAGE>

          (i)    the terms of Inter-Company Loan Agreement are not amended or
                 waived in any way;

          (ii)   (save, in the case of the Borrower, for the Charges) neither
                 party to the Inter-Company Loan Agreement assigns its rights or
                 novates its rights and obligations under the Inter-Company Loan
                 Agreement; and

          (iii)  no payment is made under the Inter-Company Loan Agreement which
                 is greater, or is made earlier, than is required to be made
                 under the terms of the Inter-Company Loan Agreement.

     (Y)  ABANDONMENT OF DTT: It will not abandon all or any material part of
          its DTT transmission network.

     (Z)  FULLY PAID SHARES: It will ensure that all shares directly owned by
          it, or by any member of the Borrower's Restricted Group (other than a
          member to which Clause 20.1(R)(v) applies) are charged to the Agent
          and that all those shares are fully paid, have no liability attaching
          to the holder and, as against the Agent upon enforcement of the
          Charges, are free from any restriction on transfer and any rights of
          pre-emption (except as provided in Clause 20.1(R)(ii)(b)). It will
          also ensure that the share certificates for all those shares are
          delivered to the Agent as soon as reasonably practicable after the
          relevant company obtains possession of those share certificates in its
          name or in the name of its nominee.

     The Parent agrees that, unless otherwise agreed by the Agent (acting on the
     instructions of an Instructing Group):

     (AA) BORROWER AS A SUBSIDIARY: It will ensure that the Borrower remains its
          wholly-owned Subsidiary.

     Each of the Borrower and the Parent agrees that, unless otherwise agreed by
     the Agent (acting on the instructions of an Instructing Group):

     (BB) SUBORDINATED LOAN AGREEMENT: It will not amend or waive any term of
          the Subordinated Loan Agreement. This paragraph does not, however,
          prohibit an increase in the principal amount available to the Borrower
          under the Subordinated Loan Agreement.

     The Borrower agrees that, unless otherwise agreed by the Agent (acting on
     the instructions of an Instructing Group):

     (CC) HEDGING POLICY: It will use its best efforts to hedge its interest
          rate exposure in accordance with the Hedging Policy and the following
          requirements:

          (i)    Each Hedging Contract will comply with the requirements of
                 Schedule 11.

          (ii)   Security may be granted to a Hedging Bank only on an equal
                 basis with the Lenders. This may only be achieved by the
                 counterparty to the Hedging Contract executing and delivering a
                 Hedging Bank Agreement with the Agent substantially in the form
                 of Schedule 10.

          (iii)  It will use its best efforts to ensure that all Hedging
                 Contracts required by the Hedging Policy are effective by the
                 date 90 days after the Amendment Date.
<PAGE>

          (iv)   The counterparties in all Hedging Contracts must at all times
                 be Lenders or their affiliates.

          (v)    The aggregate notional principal amount under all the Hedging
                 Contracts will not exceed the Facility A Commitments (provided
                 that, to the extent that the notional principal amount exceeds
                 the Facility A Loan, the Borrower will supply the Agent with
                 details of proposed Facility A Advances to be made by it in
                 respect of this amount).

          (vi)   The Borrower will notify the Agent before executing any Hedging
                 Contract and before agreeing any transaction under a Hedging
                 Contract. This notification will include details of the
                 commercial terms of the Hedging Contract. In the notification
                 the Borrower will confirm that the proposed Hedging Contract or
                 transaction will not infringe the requirements of this
                 paragraph.

     (DD) JOINT VENTURES: It will not (and will procure that none of its
          Restricted Subsidiaries will) enter into or acquire any interest in
          any company, partnership or other unincorporated person for the
          purpose of implementing any joint venture other than by:

          (i)    the acquisition of stocks, shares or securities in a limited
                 liability company; or

          (ii)   through a limited liability company established for the purpose
                 of implementing the relevant joint venture.

     (EE) SHAREHOLDER SUPPORT: In the event that TeleDiffusion de France
          International S.A. does not complete the exchange of its shareholding
          in the Parent for a shareholding in CCIC (the "TDF ROLL-UP") on or
          before 16th July, 1999, it will procure that TeleDiffusion de France
          International S.A. gives a support letter substantially in the form of
          that delivered by CCIC in order to satisfy the requirement set out in
          paragraph 14 of Schedule 3.

     (FF) RESTRICTIVE COVENANT INDEMNITY INSURANCE: Unless copies of the
          documents identified in the Certificate of Title (provided to the
          Agent by the solicitors for the Borrower) as missing are provided to
          the solicitors for the Agent by no later than 25th June, 1999 the
          Borrower will use its best efforts to put in place by no later than
          9th July, 1999 (at its own cost) restrictive covenant indemnity
          insurance acceptable to the Agent (acting reasonably) in respect of
          each of the following properties as the same are more particularly
          described in Part 2 of Schedule 1 to the Debenture, namely:

          (i)    Bolehill;

          (ii)   Cheadle Heath; and

          (iii)  Droitwich;

          and ensure that a note of the Lenders' interest is noted thereon.

     (GG) POSTWICK: It will use its best efforts to put in place by no later
          than 9th July, 1999 (at its own cost) restrictive covenant indemnity
          insurance acceptable to the Agent (acting reasonably) in respect of
          the property at Postwick as the same is more particularly described in
          Part 2 of Schedule 1 to the Debenture and ensure that a note of the
          Lenders' interest is noted therein.
<PAGE>

     (HH) SUPPLEMENTAL CERTIFICATE OF TITLE: It will use its best efforts to
          provide the solicitors for the Agent by no later than 25th June, 1999
          with a supplemental certificate of title in the agreed form in respect
          of the property at Swansea as the same is more particularly described
          in Part 2 of Schedule 1 of the Debenture which will comprise a report
          on the lease dated 10th February, 1992 made between The Secretary of
          State for Wales (1) and the British Broadcasting Corporation (2).

20.2 DURATION OF COVENANTS

     The obligations under this Clause and Clauses 18 and 19 will cease to have
     effect when the Facilities have ceased to be available and there are no
     amounts outstanding under any of the Facilities.

21.  TERMINATION EVENTS

21.1 TERMINATION EVENTS

     Each of the following is a Termination Event:

     (A)  NON-PAYMENT: A Company fails to pay an amount due under a Financing
          Document or a Hedging Contract unless the reason for the failure is
          technical or administrative. In that case there will be a Termination
          Event only if that amount is not paid by that or any other Company
          within 3 Business Days of the due date.

     (B)  OTHER DEFAULTS: A Company fails to perform any of its other
          obligations under a Financing Document or a Hedging Contract. There
          will not, however, be a Termination Event under this paragraph if the
          failure is capable of remedy and is cured within 14 days of the
          Borrower becoming aware of the failure.

     (C)  UNTRUE REPRESENTATIONS: Any statement made, or deemed repeated, in a
          Financing Document or a Hedging Contract or in any document delivered
          by a Company under a Financing Document or a Hedging Contract is
          untrue or misleading when that statement is made.

     (D)  CROSS DEFAULT:  Any Indebtedness for Borrowed Money of a member of the
          Borrower's Restricted Group other than under a Financing Document or a
          Hedging Contract:

          (i)    is not paid or repaid when due for payment or repayment or
                 within any applicable grace period; or

          (ii)   is, or becomes capable of being, declared due and payable
                 before its stated date of payment in accordance with its terms
                 and by reason of an event of default (however described).

          There will not be a Termination Event under this paragraph unless the
          aggregate amount of the Indebtedness for Borrowed Money to which (i)
          or (ii) applies exceeds (Pounds)500,000.

     (E)  INSOLVENCY AND REORGANISATION: Any procedure is commenced with a view
          to the winding-up or re-organisation of a member of the Borrower's
          Restricted Group or with a view to the appointment of an
          administrator, receiver or trustee in bankruptcy in relation to a
          member of the Borrower's Restricted Group or any of its assets. This
          procedure may be a court procedure or any other step which under
          applicable law is a possible means of achieving any of those results.
          It
<PAGE>

          will not be a Termination Event, however, if any procedure is
          commenced with a view to the insolvent winding-up of a member of the
          Borrower's Restricted Group and this procedure is contested in good
          faith and dismissed within 28 days of its commencement.

     (F)  ENFORCEMENT OF SECURITY: The holder of any Security over any of a
          member of the Borrower's Restricted Group's assets commences the
          enforcement of that Security in accordance with its terms. This will
          not be a Termination Event if the aggregate amount secured by the
          Security is (Pounds)100,000 or less.

     (G)  ATTACHMENT OR DISTRESS: Any assets of a member of the Borrower's
          Restricted Group are subject to attachment, sequestration, execution
          or any similar process in respect of Indebtedness for Borrowed Money
          of more than (Pounds)100,000.

     (H)  INABILITY TO PAY DEBTS:  A member of the Borrower's Restricted Group:

          (i)    is unable to pay its debts as they fall due within the meaning
                 of section 123(1) of the Insolvency Act 1986 unless, in the
                 case of section 123(1)(a) only, a statutory notice has been
                 withdrawn, stayed or dismissed within 21 days;

          (ii)   admits its inability to pay its debts as and when they fall due
                 or seeks a composition or arrangement with its creditors or any
                 class of them; or

          (iii)  suspends payments of its debts as they fall due,

          or the value of the assets of a member of the Borrower's Restricted
          Group is less than the amount of its liabilities, taking into account
          its contingent and prospective liabilities at their valued amounts,
          calculated in accordance with Generally Accepted Accounting
          Principles.

     (I)  INSOLVENCY EQUIVALENCE: Anything analogous to any of the events
          described in paragraphs (E) to (H) (inclusive) occurs in any relevant
          jurisdiction.

     (J)  UNLAWFULNESS OR REPUDIATION: It is unlawful for a Company to comply
          with, or it repudiates, its material obligations under a Financing
          Document.

     (K)  CESSATION OF BUSINESS: The Borrower ceases or threatens to cease to
          carry on a material part of the Analogue Transmission Business, the
          DTT Transmission Business or any other material part of its business,
          or any member of the Borrower's Restricted Group ceases or threatens
          to cease to carry on any other material business operated by the
          Borrower's Group (taken as a whole). This paragraph does not apply in
          respect of disposals which are permitted under Clause 20.1(D).

     (L)  CHANGE OF CONTROL - ANALOGUE TRANSMISSION AGREEMENT: Any event or
          circumstance described in Clause 13.5.1 of the Analogue Transmission
          Agreement occurs and subsists as a result of which the BBC is entitled
          to terminate the Analogue Transmission Agreement (whether or not it
          exercises its rights to terminate) by virtue of Clause 13.5.1 of the
          Analogue Transmission Agreement. For the purposes of this paragraph
          (save where sub-paragraph (iii) applies) any amendment made to the
          Analogue Transmission Agreement or the Commitment Agreement (as
          defined in the Share Sale Agreement), and any waiver or consent
          granted by the BBC, will be disregarded. However, there will not be a
          Termination Event under this paragraph in any of the following cases:
<PAGE>

          (i)    If all the Lenders have given their prior written consent.

          (ii)   If the event or circumstance is a flotation of shares as
                 described in Clause 10.4(B).

          (iii)  If:

                 (a) the BBC is not entitled to terminate the Analogue
                     Transmission Agreement by virtue of that event or
                     circumstance because the Analogue Transmission Agreement or
                     the Commitment Agreement (as defined in the Share Sale
                     Agreement) has been amended or the BBC has granted a waiver
                     or consent; and

                 (b) the Agent (acting on the instructions of an Instructing
                     Group) has given its prior written consent provided that
                     such prior written consent will not be required if the TdF
                     Roll-up is completed on or before 16th July, 1999.

     (M)  CHANGE OF CONTROL - BBC DTT TRANSMISSION AGREEMENT: Any event or
          circumstance described in Clause 12.7.1 of the BBC DTT Transmission
          Agreement occurs and subsists as a result of which the BBC is entitled
          to terminate the BBC DTT Transmission Agreement (whether or not it
          exercises its rights to terminate) by virtue of Clause 12.7.1 of the
          BBC DTT Transmission Agreement. For the purposes of this paragraph
          (save where sub-paragraph (iii) applies) any amendment made to the BBC
          DTT Transmission Agreement, and any waiver or consent granted by the
          BBC, will be disregarded. However, there will not be a Termination
          Event under this paragraph in any of the following cases:

          (i)    If all the Lenders have given their prior written consent.

          (ii)   If the event or circumstance is a flotation of shares as
                 described in Clause 10.4(B).

          (iii)  If:

                 (a) the BBC is not entitled to terminate the BBC DTT
                     Transmission Agreement by virtue of that event or
                     circumstance because the BBC DTT Transmission Agreement has
                     been amended or the BBC has granted a waiver or consent;
                     and

                 (b) the Agent (acting on the instructions of an Instructing
                     Group) has given its prior written consent provided that
                     such prior written consent will not be required if the TdF
                     Roll-up is completed on or before 16th July, 1999.

     (N)  MATERIAL ADVERSE CHANGE: Either of the following occurs:

          (i)    There is a change in financial condition of the Borrower or
                 (taken as a whole) the Parent and the Borrower's Group having a
                 material adverse impact on the Borrower's or (taken as a whole)
                 the Guarantors' ability to perform its or their payment
                 obligations under the Financing Documents since the last date
                 as at which each of the covenants in Clause 19.2 were measured.
                 The assessment of whether the change in financial condition is
                 material will be measured against the covenants tested on that
                 date.

          (ii)   An event or circumstance occurs and is continuing affecting the
                 business or operations of the Borrower and (taken as a whole)
                 the
<PAGE>

                 Parent and the Borrower's Group and having a material adverse
                 impact on the Borrower's or (taken as a whole) the Guarantors'
                 ability to perform its or their payment obligations under the
                 Financing Documents. The assessment of whether there has been a
                 material adverse impact will be measured against the business
                 or operations of the Borrower and (taken as a whole) the Parent
                 and the Borrower's Group on the Amendment Date.

     (O)  LITIGATION: A Company is involved in litigation which is reasonably
          likely to have an unfavorable outcome materially adversely affecting
          the Borrower's or (taken as a whole) the Guarantors' ability to
          perform its or their obligations under the Financing Documents or, in
          the case of the Borrower, to perform its material obligations under
          any of the Transmission Agreements.

     (P)  FAILURE OF PURPOSE: The Borrower cannot use the proceeds of the
          Facilities for the purposes described in Clause 2.2.

     (Q)  ILLEGALITY OR TERMINATION OF THE TRANSMISSION AGREEMENTS: Any of the
          Transmission Agreements is terminated or ceases to be in full force
          and effect or it becomes illegal for:

          (i)    the BBC to perform its obligations under the Analogue
                 Transmission Agreement or the BBC DTT Transmission Agreement;
                 or

          (ii)   ONDIGITAL to perform its obligations under the ONDIGITAL DTT
                 Transmission Agreement.

     (R)  DEFAULT BY THE BBC: The BBC is due to pay, but has not paid within
          five Business Days of the due date, amounts under the Analogue
          Transmission Agreement or the BBC DTT Transmission Agreement in either
          case in an aggregate amount exceeding (Pounds)5,000,000 (which figure
          shall be increased each year by applying an indexation factor
          equivalent to that obtained from the indexation provisions set out in
          the relevant agreement which relates to the scheduled monthly payments
          as and when such indexation calculation under the relevant
          transmission agreement takes place). The Agent may rely on a
          certificate of the Borrower as to the prevailing default limit figure
          resulting from such indexation.

     (S)  DEFAULT BY ONDIGITAL: ONDIGITAL is due to pay, but has not paid within
          five Business Days of the due date, amounts under the ONDIGITAL DTT
          Transmission Agreement in an aggregate amount exceeding
          (Pounds)5,000,000 (which figure shall be increased by applying an
          indexation factor equivalent to that obtained from the indexation
          provisions set out in the ONDIGITAL DTT Transmission Agreement as and
          when such indexation calculation under the ONDIGITAL DTT Transmission
          Agreement takes place). The Agent may rely on a certificate of the
          Borrower as to the prevailing default limit figure resulting from such
          indexation.

     (T)  FORCE MAJEURE: Any event or circumstances constituting "Force Majeure"
          (as defined in the relevant Transmission Agreement) occurs under any
          of the Transmission Agreements. This will only be a Termination Event
          if it has a material adverse impact on the ability of the Borrower or
          (taken as a whole) the Guarantors to perform its or their payment
          obligations under the Financing Documents.
<PAGE>

     (U)  BONDS: The Bonds are redeemed or repurchased in whole or in part at
          any time prior to their final maturity for any reason or are declared
          due and payable before their stated date of payment in accordance with
          their terms and by reason of an event of default. This does not apply
          to redemptions or repurchases of part where that part, when aggregated
          with any other such redemptions or repurchases, amounts to not more
          than (Pounds)500,000 in principal amount.

21.2 CONSEQUENCES OF A TERMINATION EVENT

     If a Termination Event occurs and is continuing the Agent may by notice to
     the Borrower:

     (A)  cancel the Facilities; or

     (B)  demand immediate repayment of the Loan,

     or both.  The Agent agrees to deliver a notice under this sub-clause if an
     Instructing Group instructs the Agent to do so.  In the case of
     cancellation the Lenders will be under no further obligation to make an
     Advance.  In the case of a demand for repayment the Borrower agrees to pay
     the Lenders in accordance with the notice.

21.3 INDEMNITY

     If there is a Termination Event the Borrower agrees to reimburse the Agent
     and each Lender for the losses and expenses the Agent or that Lender
     incurs, or will incur, as a result.  Clause 11.7 also applies.

21.4 CURRENCY INDEMNITY

     This sub-clause applies where a payment due by a Company under or in
     connection with a Financing Document is made or is required to be made in a
     currency other than the specified currency.  To the extent that the amount
     received, when converted into the specified currency, is less than the
     amount due the Borrower agrees to reimburse the person entitled to the
     payment for the difference.  For the purposes of the computation of this
     amount that person will apply to the amount received a rate of exchange
     prevailing on the date of receipt.  If, however, that person is unable to
     use the amount received to buy the specified currency on the date of
     receipt, the rate of exchange prevailing on the first date on which that
     person could buy the specified currency will be used instead.  The
     obligation in this sub-clause is a separate and independent obligation.
<PAGE>

                           PART VII : MISCELLANEOUS

22.  THE AGENT AND THE ARRANGERS

22.1 APPOINTMENT

     The Agent is appointed as an agent by each Lender.  The Agent is not acting
     as agent of any Company under this Agreement except for the limited purpose
     of signing Substitution Certificates in accordance with Clause 25.3.

22.2 AUTHORITY

     The Agent is authorised to exercise the rights, powers, discretions and
     duties which are specified by the Financing Documents.  The Agent may also
     act in a manner reasonably incidental to these matters.

22.3 DUTIES

     In addition to the obligations of the Agent set out elsewhere in the
     Financing Documents the Agent agrees as follows:

     (A)  NOTICES: The Agent will as soon as reasonably practicable notify each
          Lender of the contents of each notice received from a Company under
          the terms of a Financing Document. If the notice only affects
          particular Lenders the Agent may elect to notify only those Lenders,
          in which case it will do so as soon as reasonably practicable.

     (B)  OTHER DOCUMENTS: When a Company delivers to the Agent any other
          document required to be delivered under a Financing Document the Agent
          will as soon as reasonably practicable provide a copy to each Lender.
          The Borrower agrees to reimburse the Agent for the costs of preparing
          any copies required for this purpose.

     (C)  TERMINATION EVENTS: The Agent will notify each Lender of any
          Termination Event or Potential Termination Event. This obligation will
          not arise, however, until the Agent receives express notice with
          reasonable supporting evidence of the Termination Event or Potential
          Termination Event. Until this time the Agent is entitled to assume
          that there is no Termination Event or Potential Termination Event. The
          Agent is not required to make inquiries. Information referred to in
          Clause 22.11 does not have to be disclosed under this sub-clause.

     (D)  INFORMATION: The Agent will request the Borrower to deliver to the
          Agent under Clause 18.3 any information reasonably requested by a
          Lender.

22.4 POWERS

     In addition to the powers of the Agent set out elsewhere in the Financing
     Documents the Agent has the following powers:

     (A)  PROFESSIONAL ADVISERS: The Agent may instruct professional advisers to
          provide advice in connection with the Facilities.

     (B)  AUTHORITY FROM INSTRUCTING GROUP: The Agent may take any action which
          is not inconsistent with the Financing Documents and which is
          authorised by an Instructing Group.
<PAGE>

     (C)  VIEWS OF INSTRUCTING GROUP: In exercising any of its rights, powers or
          discretions the Agent may seek the views of an Instructing Group. If
          it exercises those rights, powers or discretions in accordance with
          those views the Agent will incur no liability.

     (D)  PROCEEDINGS: The Agent may institute legal proceedings against a
          Company in the name of those Lenders which authorise it to take those
          proceedings.

     (E)  COMPLIANCE WITH LAW: The Agent may take any action necessary for it to
          comply with applicable laws.

     (F)  HEDGING AND OVERDRAFTS: The Agent may sign any Hedging Bank Agreement
          or Overdraft Bank Agreement and the Subordinated Loan Agreement.

     The Agent is not required to exercise any of these powers and will incur no
     liability if it fails to do so.  In the context of legal proceedings the
     Agent may decline to take any step until it has received indemnities or
     security satisfactory to it.

22.5 RELIANCE

     The Agent is entitled to rely upon each of the following:

     (A)  Advice received from professional advisers.

     (B)  A certificate of fact received from a Company and signed by an
          Authorised Person.

     (C)  Any communication or document believed by the Agent to be genuine. The
          Agent will not be liable for any of the consequences of relying on
          these items.

22.6 EXTENT OF AGENT'S DUTIES

     (A)  NO OTHER DUTIES: The Agent has no obligations or duties other than
          those expressly set out in the Financing Documents, the Hedging Bank
          Agreements and the Overdraft Bank Agreements.

     (B)  ILLEGALITY AND LIABILITY: The Agent is not obliged to do anything
          which is illegal or which may expose it to liability to any person.

     (C)  NOT TRUSTEE: The Agent is not acting as a trustee for any purpose in
          connection with this Agreement, except for its role described in
          Clause 22.13, 22.14 and 22.15, and as described in the Hedging Bank
          Agreements and Overdraft Bank Agreements.

22.7 RESPONSIBILITY OF THE LENDERS

     Each Lender is responsible for its own decision to become involved in the
     Facilities and its decision to take or not take action under the
     Facilities.  It should make its own credit appraisal of each Company and
     the terms of the Facilities.  Neither the Agent nor either of the Arrangers
     makes any representation that any information provided to a Lender before,
     on or after the date of this Agreement is true.  Accordingly each Lender
     should take whatever action it believes is necessary to verify that
     information.  In addition neither the Agent nor either Co-arranger is
     responsible for the legality, validity or adequacy of any Financing
     Document or the efficacy of the Security under the Charges.  Each Lender
     will satisfy itself on these issues.
<PAGE>

22.8 LIMITATION OF LIABILITY

     (A)  AGENT: The Agent will not be liable to the Lenders for any action or
          non-action under or in connection with the Financing Documents unless
          caused by its gross negligence or wilful misconduct.

     (B)  DIRECTORS, EMPLOYEES AND AGENTS: No director, employee or agent of the
          Agent will be liable to a Lender or a Company in relation to the
          Financing Documents. Each Lender and each Company agrees not to seek
          to impose this liability upon them.

22.9 BUSINESS OF THE AGENT

     Despite its role as agent of the Lenders the Agent may:

     (A)  participate as a Lender in the Facilities or as a Hedging Bank or an
          Overdraft Bank,

     (B)  carry on all types of business with any Company, and

     (C)  act as agent for other groups of lenders to any Company or other
          borrowers.

22.10  INDEMNITY

     Each Lender agrees to reimburse the Agent for all losses and expenses
     incurred by the Agent as a result of its appointment as Agent or arising
     from its activities as Agent.  These losses and expenses will take into
     account amounts reimbursed to the Agent by the Borrower.  The liability of
     each Lender under this sub-clause will be limited to the share of the total
     losses and expenses which corresponds to that Lender's share of the
     Commitments or, if an Advance has been made and is outstanding, the Loan.
     If the losses or expenses are attributable to an activity of the Agent
     which relates to only some of the Lenders the Agent may instead notify the
     Lenders of a different sharing arrangement.  In this case the limit of
     liability of a Lender under this sub-clause will be determined by the
     Agent.  The Lenders are not liable for losses and expenses arising from the
     gross negligence or willful misconduct of the Agent.

22.11  CONFIDENTIAL INFORMATION

     The Agent is not required to disclose to the Lenders any information:

     (A)  which is not received by it in its capacity as Agent, or

     (B)  which it receives, with its consent, on a confidential basis.

22.12  RESIGNATION AND REMOVAL

     The Agent may resign by giving notice to the Borrower and the Lenders.  The
     Agent may be removed by notice given by an Instructing Group  to the Agent
     and the Borrower. In either event the following apply:

     (A)  APPOINTMENT BY INSTRUCTING GROUP: An Instructing Group may appoint a
          new Agent after consultation with the Borrower.

     (B)  APPOINTMENT BY THE RESIGNING AGENT: If the Agent has resigned and the
          Instructing Group has not appointed a new Agent within 30 days after
          the
<PAGE>

          resigning Agent's notice, the resigning Agent may appoint a new Agent
          after consultation with the Borrower.

     (C)  MODE OF APPOINTMENT: A new Agent will be appointed by notice to the
          Borrower and the Lenders. A new Agent cannot be appointed without its
          consent.

     (D)  TIMING OF APPOINTMENT: If the Agent has resigned, the new Agent will
          become Agent at a time agreed between the new Agent and the resigning
          Agent. If no time is agreed the new Agent will become Agent 10
          Business Days after the notice referred to in paragraph (C). Any
          resignation or removal of the Agent will not be effective until a new
          Agent has been appointed and accepted its appointment.

     (E)  EFFECT OF APPOINTMENT: Upon a new Agent becoming Agent the
          resigning/removed Agent will cease to be Agent. Accordingly it will be
          discharged from its obligations and duties as Agent. It will, however,
          continue to be able to rely on the terms of this Clause in respect of
          all matters relating to the period of its appointment. The new Agent
          will assume the role of Agent. It will have all the rights, powers,
          discretions and duties of the Agent provided for in this Agreement.

     (F)  TRANSITION: The resigning/removed Agent and the new Agent agree to co-
          operate to ensure an orderly transition. The resigning/removed Agent
          agrees to deliver or make available to the new Agent all records,
          files and information held by it as Agent. This obligation will not
          require the resigning/removed Agent to disclose any confidential
          information. the resigning/removed Agent also agrees to transfer the
          benefit of the Charges, and all rights relating to the Charges, to the
          new Agent. The Borrower agrees to co-operate, to the extent reasonably
          necessary, with this transfer. If required by the new Agent the
          Borrower agrees to execute new Charges in favour of the new Agent on
          identical terms as the then existing Charges.

22.13  OBLIGATION TO PAY TO THE AGENT

     Each Company agrees to pay to the Agent on demand each amount due and
     payable by that Company to a Lender under any of the Financing Documents.
     This obligation will be satisfied to the extent that the amount is paid to
     the Lender in accordance with Clause 12.4.  It does not affect the rights
     of the Lender or the obligation of the Company to the Lender.  A payment of
     an amount under this sub-clause will, however, satisfy that Company's
     obligation to pay that amount to the Lender.

22.14  HOLDING AS SECURITY TRUSTEE

     The Agent agrees that it holds the benefit of:

     (A)  Clause 22.13; and

     (B)  the Charges and all Security arising from the Charges,

     as trustee on behalf of:

          (i)    the Lenders;

          (ii)   each Hedging Bank which executes a Hedging Bank Agreement in
                 accordance with Clause 20.1(CC)(ii); and
<PAGE>

          (iii)  each Overdraft Bank.

     All the Agent's rights and claims arising under the items mentioned in
     paragraphs (A) and (B) are vested in it on this basis.

22.15 SECURITY

      (A) PERFECTION OF SECURITY AND TITLE:  The Agent:

          (i)    is not liable for any failure, omission or defect in perfecting
                 the Security constituted by any Charge;

          (ii)   may accept without enquiry the title to the property over which
                 Security is intended to be created by any Charge.

      (B) CUSTODY: The Agent is not under any obligation to hold any title
          deeds, security documents or any other documents in connection with
          the property charged by any Charge or to take any steps to protect or
          preserve these documents. The Agent may permit a Company to retain all
          these documents in its possession or may deposit them with a nominee
          or custodian. This paragraph does not apply to documents held in
          relation to a legal mortgage over, or over an interest in, real
          property or shares.

22.16 THE ARRANGERS

      The Arrangers have no continuing role in connection with the Facilities
      and are not liable in respect of any matter concerning the Facilities.
      They are not the agents for any Lender.

22.17 CONFIRMATION OF EACH LENDER

      Each Lender confirms to the Agent that, unless it notifies the Agent to
      the contrary, it will be the beneficial owner of any interest paid to it
      under this Agreement and it is a bank for purposes of section 349(3)of the
      Income and Corporation Taxes Act 1988 and will be within the charge to
      United Kingdom corporation tax in respect of that interest.

23.  EVIDENCE AND CERTIFICATES

23.1 EVIDENCE OF DEBT

     The Agent will maintain in its books an account showing all liabilities
     accrued and payments made in relation to the Financing Documents.  Details
     of amounts outstanding recorded in this account will be evidence of each
     Company's obligations unless there is shown to be an error.

23.2 CERTIFICATES

     Each certificate delivered under this Agreement must contain reasonable
     detail of the matters being certified.  Certificates delivered by the Agent
     or a Lender will be evidence unless there is shown to be an obvious error.
<PAGE>

24.  NOTICES

24.1 NATURE OF NOTICES

     No notice delivered by a Company under this Agreement may be withdrawn or
     revoked.  Each notice delivered by a Company must be unconditional.  It
     must also be signed by an Authorised Person.

24.2 DELIVERY OF NOTICES

     A notice under this Agreement will only be effective if it is in writing
     and is received.  Telexes and faxes are permitted.

24.3 NOTICES THROUGH THE AGENT

     Each notice from a Company or a Lender will be delivered to the Agent. The
     Agent agrees to pass on the details of notices received by it to the
     appropriate recipient as soon as reasonably practicable.

24.4 ADDRESS DETAILS

     Notices will be delivered to the address of the intended recipient as set
     out on the signature page.  A Company or a Lender may change its address
     details by notice to the Agent.  The Agent may change its address details
     by notice to each Company and each Lender.

25.  ASSIGNMENT AND NOVATION

25.1 COMPANY

     The rights of a Company under this Agreement are personal to it.
     Accordingly they are not capable of assignment.

25.2 ASSIGNMENT BY A LENDER

     A Lender may assign in whole or in part its rights under this Agreement if:

     (A) At the same time the proposed assignee assumes the whole or (as the
         case may be) the relevant part of the Lender's obligations under this
         Agreement to the satisfaction (acting reasonably) of the Agent and the
         Borrower;

     (B) It is assigning an amount of its Facility A Commitments and an amount
         of its Facility B Commitments which when these amounts are expressed as
         a proportion of, in the case of Facility A Commitments, the Total
         Facility A Commitments and, in the case of Facility B Commitments, the
         Total Facility B Commitments, results in the same figure; and

     (C) The principal amount to be assigned (or, in the case of an amount in
         the Optional Currency, the Original Sterling Amount) must equal or
         exceed (Pounds)2,500,000 (or be the remaining amount of its Facility A
         Commitment and Facility B Commitment).

     (D) It obtains the written consent of the Borrower in advance. The Borrower
         agrees that it will not unreasonably withhold this consent. If the
         Borrower does not reply
<PAGE>

         to a written request for consent within 10 Business Days it will be
         treated as having given its consent. No consent is required where the
         assignment:

         (i)    is to another Lender;

         (ii)   is to an affiliate or Subsidiary or Holding Company of the
                assignor;

         (iii)  occurs when there is an outstanding Termination Event; or

         (iv)   is part of the syndication process arranged by the Arrangers.

     Neither the Agent nor any Lender will be obliged to treat any person to
     whom a Lender makes an assignment as an assignee until that person agrees
     to pay to the Agent the fee mentioned in Clause 25.3(D).

25.3 NOVATION BY A LENDER

     A Lender (the "EXISTING LENDER") may be released from its obligations and
     surrender its rights under this Agreement to the extent that exactly
     corresponding obligations and rights are assumed by another lender (the
     "NEW LENDER") in accordance with the following:

     (A)  The Existing Lender must novate an amount of its Facility A
          Commitments and an amount of its Facility B Commitments which when
          these amounts are expressed as a proportion of, in the case of
          Facility A Commitments, the Total Facility A Commitments and, in the
          case of Facility B Commitments, the Total Facility B Commitments,
          results in the same figure.

     (B)  The principal amount to be novated (or, in the case of an amount in
          the Optional Currency, the Original Sterling Amount) must equal or
          exceed (Pounds)2,500,000 (or be the remaining amount of its Facility A
          Commitment and Facility B Commitment).

     (C)  The Existing Lender must obtain the prior written consent of the
          Borrower to the proposed novation. The Borrower agrees that it will
          not unreasonably withhold this consent. If the Borrower does not reply
          to a written request for consent within 10 Business Days it will be
          treated as having given its consent. No consent is required where the
          novation:

          (i)   is to another Lender;

          (ii)  is to an affiliate or Subsidiary or Holding Company of the
                assignor;

          (iii) occurs when there is an outstanding Termination Event; or

          (iv)  is part of the syndication process arranged by the Arrangers.

     (D)  Once the Borrower's written consent is obtained (or treated as
          obtained), the Existing Lender will deliver to the Agent a
          Substitution Certificate. This must be signed by both the Existing
          Lender and the New Lender and be properly completed. It must have
          attached to it the Borrower's consent. Alternatively it must have
          attached to it the Existing Lender's request for a consent and a
          certificate of an officer of the Existing Lender to the effect that
          such request was received by the Borrower and that no reply was
          received within 10 Business Days. The Existing Lender will also
          arrange for the payment of a processing fee to the Agent. The amount
          of this fee is (Pounds)750 (plus any reasonable expenses) unless the
          Agent has notified the Lenders of a different amount which has been
          agreed with an Instructing Group. No fee is payable where the novation
          is part of the syndication process arranged by the Arrangers.
<PAGE>

     (E)  The Agent will sign the Substitution Certificate no later than 5
          Business Days after its receipt and the payment of the processing fee.
          This signature will be made on behalf of the other Lenders and the
          Companies as well as itself. Each Lender and each Company irrevocably
          authorises the Agent to sign in this manner.

     (F)  The Substitution Certificate will take effect on the date it
          specifies. On this date:

          (i)   The Existing Lender is released from its obligations and
                surrenders its rights to the extent described in the
                Certificate.

          (ii)  The New Lender assumes obligations and rights exactly
                corresponding to those released and surrendered by the Existing
                Lender.

          The Facility A Commitment and Facility B Commitment of the Existing
          Lender will be reduced accordingly and the New Lender will assume a
          Facility A Commitment and Facility B Commitment of the amount of the
          corresponding reduction.

25.4 DISCLOSURE OF INFORMATION

     A Lender may disclose to an assignee or New Lender, or to a proposed
     assignee or New Lender, any information received by the Lender under or in
     connection with the Financing Documents, including a copy of each of those
     documents.  A Lender may not disclose this information to any of these
     persons unless that person has executed a confidentiality undertaking
     substantially in the form set out in Schedule 7.

25.5 LIMITATION ON CERTAIN OBLIGATIONS OF BORROWER

     This sub-clause applies to any novation or assignment by a Lender and any
     change of office through which a Lender is acting.  If, at the time it is
     effected, circumstances exist which would oblige the Borrower to pay to the
     New Lender, assignee or Lender under Clause 11 any sum in excess of the sum
     (if any) which it would have been obliged to pay to the Existing Lender,
     assignor or that Lender under Clause 11 in the absence of that novation,
     assignment or change, the Borrower shall not be obliged to pay that excess.

26.  WAIVERS, AMENDMENTS AND RELEASES OF SECURITY

26.1 WRITING REQUIRED

     A waiver or amendment of a term of this Agreement will only be effective if
     it is in writing.

26.2 AUTHORITY OF THE AGENT

     If authorised by an Instructing Group the Agent may grant waivers and agree
     amendments of any Financing Document with any Company.  These waivers and
     amendments will be granted on behalf of the Lenders and be binding on all
     of them, including those which were not part of the Instructing Group.
     This sub-clause does not authorise the Agent to grant any waiver or agree
     any amendment affecting any of the following:

     (A)  The identity of any Company.

     (B)  The amount of the Facilities.

     (C)  The amount or method of calculation of interest or commitment fee.
<PAGE>

     (D)  The manner, currency or timing of repayment of the Loan or of the
          payment of any other amount.

     (E)  The definition of "Facility A Commitment Availability Termination
          Date" or "Facility Termination Date".

     (F)  The definition of "Instructing Group", "Restricted Subsidiary" or
          "Unrestricted Subsidiary".

     (G)  The obligations of the Lenders.

     (H)  Any requirement (including the one in this sub-clause) that all the
          Lenders or a certain proportion of them consent to a matter or deliver
          a notice.

     (I)  Clauses 3, 14 or 25.1.

     (J)  Subject to Clause 26.3, the release of any Security constituted by the
          Charges.

     (K)  This Clause 26.2

     Waivers or amendments affecting these matters require the consent of all
     Lenders.

26.3 RELEASE OF SECURITY FOR PERMITTED DISPOSALS

     The Agent is authorised by the Lenders to effect the release of any
     Security constituted by the Charges over any assets which are disposed of
     by a member of the Borrower's Restricted Group as permitted by Clause
     20.1(D).

26.4 EXPENSES

     The Borrower agrees to reimburse the Agent and each Lender for the expenses
     they incur as a result of any proposal made by the Borrower to waive or
     amend a term of this Agreement or to release any Security.

27.  MISCELLANEOUS

27.1 EXERCISE OF RIGHTS

     If the Agent or a Lender does not exercise a right or power when it is able
     to do so this will not prevent it exercising that right or power.  When it
     does exercise a right or power it may do so again in the same or a
     different manner.  The Agent's and the Lenders' rights and remedies under
     this Agreement are in addition to any other rights and remedies they may
     have.  Those other rights and remedies are not affected by this Agreement.

27.2 COUNTERPARTS

     There may be several signed copies of this Agreement.  There is intended to
     be a single Agreement and each signed copy is a counterpart of that
     Agreement.

28.  LAW

     This Agreement is to be governed by and construed in accordance with
     English law.
<PAGE>

                                  SCHEDULE 1:
                            LENDERS AND COMMITMENTS


<TABLE>
<CAPTION>
                                           (1)                          (2)                          (3)
                                        FACILITY A                   FACILITY B                    TOTAL OF
LENDER                                  COMMITMENT*                  COMMITMENT*                 COMMITMENTS
                                         (Pounds)                      (Pounds)                    (Pounds)
<S>                        <C>                          <C>                          <C>
Credit Suisse First Boston              6,666,666.67                 3,333,333.33                10,000,000.00

Credit Lyonnais                         6,666,666.67                 3,333,333.33                10,000,000.00

The Industrial Bank of Japan, Limited   6,666,666.67                 3,333,333.33                10,000,000.00

The Royal Bank of Scotland plc          6,666,666.67                 3,333,333.33                10,000,000.00

Scotiabank Europe plc                   6,666,666.67                 3,333,333.33                10,000,000.00

Allied Irish Banks PLC (London Branch)  5,533,333.33                 2,766,666.67                 8,300,000.00

The Governor and Company of the         5,533,333.33                 2,766,666.67                 8,300,000.00
 Bank of Ireland

The Governor and Company of the         5,533,333.33                 2,766,666.67                 8,300,000.00
 Bank of Scotland

Bayerische Landesbank                   5,533,333.33                 2,766,666.67                 8,300,000.00
 Girozentrale, London Branch

De Nationale Investeringsbank N.V.,     5,533,333.33                 2,766,666.67                 8,300,000.00
 London Branch

Dexia Project & Public Finance          5,533,333.33                 2,766,666.67                 8,300,000.00
 International Bank, London Branch

The Fuji Bank, Limited                  5,533,333.33                 2,766,666.67                 8,300,000.00

KBC Bank N.V., London Branch            5,533,333.33                 2,766,666.67                 8,300,000.00

Lloyds Bank Plc                         5,533,333.33                 2,766,666.67                 8,300,000.00

Co-operative Bank p.l.c.                3,373,333.33                 1,686,666.67                 5,060,000.00
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
                                           (1)                          (2)                          (3)
                                        FACILITY A                   FACILITY B                    TOTAL OF
LENDER                                  COMMITMENT*                  COMMITMENT*                 COMMITMENTS
                                         (Pounds)                      (Pounds)                    (Pounds)
<S>                        <C>                          <C>                          <C>
Societe Generale, London Branch         3,373,333.33                 1,686,666.67                 5,060,000.00

The Sumitomo Bank Limited               3,373,333.33                 1,686,666.67                 5,060,000.00

The Dai-Ichi Kangyo Bank, Ltd           3,373,333.33                 1,686,666.67                 5,060,000.00

Ulster Bank Limited                     3,373,333.33                 1,686,666.67                 5,060,000.00
                        --------------------------------------------------------------------------------------
                                      100,000,000.00                50,000,000.00               150,000,000.00
                        --------------------------------------------------------------------------------------
</TABLE>
*  Rounded to two decimal places.
<PAGE>

                                  SCHEDULE 2:
                                  COSTS RATE

The Costs Rate is an addition to the interest rate on an Advance to compensate
the Lenders for the cost attributable to an Advance resulting from the
imposition from time to time under or pursuant to the Bank of England Act 1998
(the "ACT") and/or by the Bank of England (or other United Kingdom governmental
or regulatory authorities or agencies) of a requirement to place non-interest
bearing or Special Deposits (whether interest bearing or not) with the Bank of
England and calculated by reference to liabilities used to fund the Advance.

The Costs Rate will be the rate determined by the Agent (and rounded upward, if
necessary, to four decimal places) as the rate resulting from the application
(as appropriate) of the following formula in relation to sterling Advances:

                          XL + S(L - D)  % per annum
                          -------------
                          100 - (X + S)


where on the day of application of a formula:

     X    is the percentage of Eligible Liabilities (in excess of any stated
          minimum) by reference to which the Agent is required under or pursuant
          to the Act to maintain cash ratio deposits with the Bank of England;

     L    is the rate of interest (less the Applicable Margin and the Costs
          Rate) payable on that day on the related Advance pursuant to Clause 8
          of this Agreement;

     S    is the level of interest-bearing Special Deposits, expressed as a
          percentage of Eligible Liabilities, which the Lender is required to
          maintain by the Bank of England (or other United Kingdom governmental
          authorities or agencies); and

     D    is the percentage rate per annum payable by the Bank of England to the
          Lender on Special Deposits.

(X, L, S and D are to be expressed in the formula as numbers and not as
percentages.  A negative result obtained from subtracting D from L shall be
counted as zero.)

The Costs Rate attributable to an Advance or other sum for any period shall be
calculated at or about 11.00 a.m. (London time) on the first day of such period
for the duration of such period.

The determination of the Costs Rate in relation to any period shall, in the
absence of manifest error, be conclusive and binding on all parties to this
Agreement.

If there is any change in circumstance (including the imposition of alternative
or additional requirements) which in the reasonable opinion of the Agent renders
or will render  the above formula (or any element of the formula, or any defined
term used in the formula) inappropriate or inapplicable, the Agent (following
consultation with the Borrower and an Instructing Group) shall be entitled to
vary the same.  Any such variation shall, in the absence of manifest error, be
conclusive and binding on all parties and shall apply from the date specified in
such notice.

For the purposes of this Schedule:

The terms "ELIGIBLE LIABILITIES" and "SPECIAL DEPOSITS" shall bear the meanings
ascribed to them under or pursuant to the Act or by the Bank of England (as may
be appropriate), on the day of the application of the formula.

Any reference  to a provision of any statute, directive, order or regulation in
this Schedule is a reference to that provision as amended or re-enacted from
time to time
<PAGE>

                                                                  CONFIRMED COPY
                                                                  --------------
                                  SCHEDULE 3:
        CONDITIONS PRECEDENT TO DRAWING ON OR AFTER THE AMENDMENT DATE

1.   A copy of the Memorandum and Articles of Association of the Borrower in the
     agreed form. This copy must be certified by a director, the secretary or
     the Director of Legal Services of the Borrower to be complete, up-to-date
     and in full force and effect.

2.   A copy of a resolution of the board of directors of the Borrower approving
     the Facilities, authorising the signature and delivery of the Financing
     Documents to which it is a party and approving the borrowing of the
     aggregate Available Commitments. The resolution must also appoint persons
     to sign notices on behalf of the Borrower under the Financing Documents to
     which it is a party and a person or persons to sign certificates under the
     Financing Documents as a "Certifying Financial Officer" in addition to the
     senior financial officer. The copy must be certified by a director, the
     secretary or the Director of Legal Services of the Borrower to be a true
     copy of duly passed resolutions each of which is in full force and effect.

3.   Specimen signatures of all persons authorised by the resolutions referred
     to in paragraph 2 above. These signatures must be certified by a director,
     the secretary or the Director of Legal Services of the Borrower to be
     genuine.

4.   A copy of the Memorandum and Articles of Association of the Parent and each
     other Guarantor in the agreed form. This copy must be certified by a
     director, the secretary or the Director of Legal Services of the Parent and
     the relevant Guarantor to be complete, up-to-date and in full force and
     effect.

5.   A copy of a resolution of the board of directors of the Parent and each
     other Guarantor approving the Guarantee and (as applicable) the Charges and
     authorising the signature and delivery of the Financing Documents to which
     it is a party. The copy must be certified by a director, the secretary or
     the Director of Legal Services of the Parent and the relevant Guarantor to
     be a true copy of a duly passed resolution which is in full force and
     effect.

6.   A legal opinion from Slaughter and May, English legal advisers to the
     Agent, substantially in the form set out in Schedule 8.

7.   A letter in the agreed form from the Borrower's insurance brokers addressed
     to the Agent (for the benefit of itself and the Lenders) confirming that
     the insurance arrangements required by the Financing Documents are in place
     with respect to the Borrower's business (including the Analogue
     Transmission Business and the DTT Transmission Business), operations and
     assets.

8.   Property Title Report and Certificates on the material properties (as
     identified by the Agent) addressed to the Agent (for the benefit of itself
     and the Lenders), in the agreed form.

9.   Copies certified by the Borrower as true, complete and up-to-date (or, as
     appropriate, executed originals) of the following documents in the agreed
     form:

     (a) Shareholders' Agreement;

     (b) Fee Letters from the Arrangers and the Agent, each counter-signed by
         the Borrower;

     (c) Supplemental and Amendment Deed;

     (d) Deposit Charge Amendment Agreement;

     (e) Transmission Agreements;
<PAGE>

     (f) NTL Site Sharing Agreement;

     (g) Contract of Services;

     (h) Subordinated Loan Agreement; and

     (i) the agreement between the Borrower and CT Finance amending the Inter-
         Company Loan Agreement.

10.  Share certificates in respect of all the issued share capital in the
     Borrower, and blank stock transfer forms duly executed by the Parent in
     respect of those share certificates.

11.  A copy of the share register of the Borrower showing the Parent as the
     registered holder of the entire issued share capital of the Borrower. This
     copy must be certified by a director, the secretary or the Director of
     Legal Services of the Borrower to be complete and up-to-date, as at the
     Amendment Date.

12.  Completed Land Registry cover (and the relevant fee in each case) in
     respect of the properties listed in Schedule 1 of the debenture described
     in paragraph (A) of the definition of "Charges" in Clause 1.1 together
     with, in the case of those properties for which an application for first
     registration has to be made, all relevant title deeds and documents and the
     results of all pre-completion searches including Land Charges Act search
     results.

13.  The acknowledgements set out in Part 2 of Schedule 3 of the Debenture,
     signed on behalf of the BBC and ONDIGITAL respectively.

14.  Evidence satisfactory to the Agent of comfort given by CCIC as to
     maintenance of support of, and levels of shareholding, in the Borrower
     (through the Parent) so as not to entitle the BBC to exercise its right to
     terminate the Analogue Transmission Agreement or the BBC DTT Transmission
     Agreement on a change of control of the Borrower.

15.  Evidence satisfactory to the Agent that ONDIGITAL consents to the charge
     taken over the ONDIGITAL Transmission Agreement.

16.  The Financial Model addressed to the Agent (for the benefit of itself and
     the Lenders).

17.  The Hedging Policy.

18.  A certificate of the Certifying Financial Officer stating (a) the amount of
     Financial Indebtedness on the last day of the Quarter immediately preceding
     the date of delivery of this certificate and (b) EBITDA for that Quarter.

19.  All share certificates relating to the shares held by the Borrower in
     Millennium and blank transfers of these shares executed by the Borrower
     with the name of the transferee left blank and stamped.

20.  The Year 2000 Programme Report in the agreed form.

21.  The letter from the Borrower to the Agent in relation to certain litigation
     and dated on or before the Amendment Date.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                                  SCHEDULE 4:
                       FORM OF SUBSTITUTION CERTIFICATE

                    CASTLE TRANSMISSION INTERNATIONAL LTD.

  (Pounds)150,000,000 TERM AND REVOLVING LOAN FACILITIES UNDER LOAN AGREEMENT
                    DATED 28TH FEBRUARY, 1997 (AS AMENDED)

                           SUBSTITUTION CERTIFICATE

To:  [Name and address of the Agent]

This certificate is delivered to you for the purposes of Clause 25.3 of the Loan
Agreement under which you are currently Agent.

     Name of Existing Lender:   ____________________________

     Name of New Lender:        ____________________________

     Details of substitution:

[Insert details distinguishing between Facilities and between undrawn commitment
and participation in the Loan and other amounts due under the Facility]

     Date of effect of substitution:    ____________________

The substitution described above will take effect in accordance with Clause 25.3
of the Loan Agreement.

The Existing Lender and the New Lender agree as follows:

1.   The New Lender is responsible for its own decision to become involved in
     the Facilities.  It should make its own credit appraisal of the Companies
     and the terms of the Facilities.  Neither the Existing Lender nor the Agent
     makes any representation that any information provided to the New Lender
     before, on or after the date of this certificate is true.  Accordingly the
     New Lender should take whatever action it believes is necessary to verify
     that information.  In addition neither the Existing Lender nor the Agent is
     responsible for the legality, validity or adequacy of the Loan Agreement.
     The New Lender will satisfy itself on these issues.

2.   There is no obligation on the Existing Lender to accept any novation or
     assignment back of the rights and obligations referred to in this
     certificate.  The Existing Lender accepts no obligation to indemnify the
     New Lender for any losses incurred as a result of a failure by the Borrower
     or any Guarantor to perform its obligations or for any other losses.  The
     New Lender acknowledges this is the case.

The New Lender represents that each of the following is true:

(A)  In respect of any payment of interest to be made to it, that New Lender
     will be, at the date the principal amount on which that interest accrued is
     advanced, a bank  for the purposes of section 349(3) of the Income and
     Corporation Taxes Act 1988.

(B)  In respect of any payment of interest to be made to it, the person
     beneficially entitled to that payment of interest at the time it is paid is
     within the charge to United Kingdom corporation tax in respect of that
     interest.

The above representations do not apply where the representations would be untrue
as a result of a change in law or Inland Revenue concession or a change in the
interpretation or application of law or Inland Revenue concession.

This certificate is to be governed by and construed in accordance with English
law.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------
Existing Lender                    New Lender
- ---------------                    ----------

[Name of Existing Lender]               [Name of New Lender]

By:                                     By:

Agent (on behalf of the other Lenders, the Companies and itself)

[Name of Agent]

By:

Date:

Notice details for New Lender

(if it is not already a

Lender):

Address:

Fax Number:

Telex Number:

Attention:
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                                  SCHEDULE 5:
                        FORM OF NOTICE FOR THE ADVANCE

To:       [Name of Agent]

          Attention: [           ]

From:  Castle Transmission International Ltd.      Date: [           ]

Dear Sirs,

         (Pounds)150,000,000 TERM AND REVOLVING LOAN FACILITIES UNDER
             LOAN AGREEMENT DATED 28TH FEBRUARY, 1997 (AS AMENDED)

1.   We refer to the above agreement between yourselves as Agent, us as Borrower
     and various other parties (the "Agreement"). Terms defined in the Agreement
     have the same meaning in this notice.

2.   We would like to draw an Advance under Facility [A]/[B] in [currency] in
     the amount of [amount] on [date].

3.   The Interest Period should be [     ] months.

4.   Please pay the above Advance to account number [              ] with [
     ] in favour of ourselves.

5.   We confirm that, today and on the Advance Date:

     (a)  the representations in Clause 17.1 of the Agreement [(other than
          paragraphs (T) [,] [and (U))] [and (V)]* are true; and

     (b)  there is [and will be] no outstanding Termination Event [or Potential
          Termination Event.]**

6.   The purpose of the Advance is [                    ].

                               Yours faithfully,



                             for and on behalf of

                    Castle Transmission International Ltd.

- ---------------

 *   [Note: The representations in Clause 17.1(T) and Clause 17.1(U) are to be
     given on the date of the first Advance on or after the Amendment Date. The
     representation in Clause 17.1(V) is to be given on the making of each
     Advance which falls on or before 31st March, 2000.


**  [Note: The statement in square brackets will not be required to be made
     where the notice is given to roll over an existing Advance (without
     increasing the amount of this Advance) for an Interest Period of no more
     than one month at any time when no Termination Event has occurred and is
     continuing.]

<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                                  SCHEDULE 6:
                    FORM OF ADDITIONAL GUARANTOR AGREEMENT

                        ADDITIONAL GUARANTOR AGREEMENT
                        ------------------------------

DATE :

PARTIES

1.   [                                 ], a company incorporated in [          ]
     (number [           ]), of [address] (the "NEW GUARANTOR")

2.   CASTLE TRANSMISSION INTERNATIONAL LTD., a company incorporated in England
     (number 3196207) whose registered office is at Warwick Technology Park,
     Gallows Hill, Heathcote Lane, Warwick CV34 6TN, on its own behalf and on
     behalf of each of the existing Guarantors (each as defined in the Loan
     Agreement referred to below)

3.   CREDIT SUISSE FIRST BOSTON (the "AGENT"), on its own behalf and on behalf
     of each of  the Lenders (as defined in the Loan Agreement)

BACKGROUND

A Loan Agreement (the "LOAN AGREEMENT") was made on 28th February, 1997 (and
amended on 21st May, 1997 and on 18th June, 1999) between (1) Castle
Transmission International Ltd. as borrower, (2) Castle Transmission Services
(Holdings) Ltd. as guarantor, (3) the lenders named in the Loan Agreement, (4)
Credit Suisse First Boston as Agent, (5) Credit Suisse First Boston as lead
arranger and others.  Under the terms of the Loan Agreement the Lenders agreed
to provide to the Borrower a (Pounds)150,000,000 credit facility.

Under Clause 20.1(R) of the Loan Agreement the New Guarantor needs to become a
guarantor.

The parties agree as follows:

1.   INTERPRETATION

     Unless a contrary intention is indicated, words and expressions defined in
     the Loan Agreement will have the same meanings when used in this Agreement.
     References to the Loan Agreement are to that agreement as amended or
     supplemented.

2.   INCORPORATION OF ADDITIONAL GUARANTOR

     With effect from the date of this Agreement the New Guarantor will:

(a)  become a party to the Loan Agreement as if it had been an original
     signatory as a guarantor; and
(b)  become a "Guarantor" within the definition in Clause 1.1 of the Loan
     Agreement.
     The New Guarantor, each other Company, each Lender and the Agent agrees to
     be bound by the Loan Agreement on this basis.

3.   REPRESENTATIONS BY THE NEW GUARANTOR

     The New Guarantor confirms in respect of itself that the representations in
     Clause 17.1(A) to (L) inclusive of the Loan Agreement if stated at the date
     of this Agreement with reference to the New Guarantor and the facts
     subsisting on the date of this Agreement, are true.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

4.   CONSTRUCTION

     This Agreement and the Loan Agreement will be read and construed as one
     document.  References in the Loan Agreement to the Loan Agreement (however
     expressed) will be read and construed as references to the Loan Agreement
     and this Agreement.

5.   NOTICES

     The notice details of the New Guarantor for the purpose of Clause 24.4 are
     as follows:

     [                        ]

     Fax number:    [         ]

     Telex number:    [         ]

     Attention:    [          ]

6.   LAW

     This Agreement is to be governed by and construed in accordance with
     English law.  The New Guarantor intends to execute this Agreement as a deed
     and agrees to execute and deliver it as a deed. [Jurisdiction clause and
     appointment of agent for the service of process to be inserted in the case
     of a New Guarantor incorporated outside England.]


SIGNATURES


[Name of New Guarantor]

Executed as a deed by the signatures

of a director and the secretary or of

two directors of the company

By:                 (Director)

By:                 (Director/Secretary)

Castle Transmission International Ltd.

By:


[Name of Agent]

By:
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                                  SCHEDULE 7:
                      FORM OF CONFIDENTIALITY UNDERTAKING

            Castle Transmission International Ltd. (the "BORROWER")

  (Pounds)150,000,000 TERM AND REVOLVING LOAN FACILITIES UNDER LOAN AGREEMENT
       DATED 28TH FEBRUARY, 1997 (AS AMENDED) (THE "FACILITY AGREEMENT")

In connection with your interest in the (Pounds)150,000,000 term and revolving
Loan Facilities for the Borrower (the "FACILITIES") constituted by the Facility
Agreement, you (the "RECIPIENT") may be provided with certain information and
material by ourselves (being an existing lender (the "EXISTING LENDER") under
the Facilities.

The Recipient agrees with the Existing Lender (for itself and as trustee for the
benefit of the Borrower) that:

1.   For the purposes of this confidentiality agreement, "CONFIDENTIAL
     INFORMATION" means all information disclosed by the Existing Lender (or any
     of its agents, representatives or advisers) concerning the Facilities, the
     Borrower or any member of the group of companies of which the Borrower is a
     member. However, it does not include information which (i) is already in
     the Recipient's possession at the time of disclosure, or (ii) is at the
     time of its disclosure, or which later becomes, part of the public domain.

2.   The Recipient will treat the Confidential Information, and the fact that
     negotiations are taking place, as confidential. The Recipient agrees to
     disclose the Confidential Information only to those of the Recipient's
     agents, representatives and advisers who need the Confidential Information
     for the purpose of evaluating the Facilities. The Confidential Information
     shall not be used by any such person for any other purpose.

3.   The Recipient will return (or, as regards Confidential Information
     disclosed to its agents, representatives and advisers, endeavour to return)
     the Confidential Information to the Existing Lender, without retaining any
     copies or summaries of it, promptly upon the written request of the
     Existing Lender. Alternatively the Recipient may promptly arrange for the
     destruction of the Confidential Information and supply written evidence to
     the Existing Lender of such destruction. However, to the extent that
     Confidential Information has been incorporated (either fully or partially)
     into analyses, compilations, studies or other documents prepared by the
     Recipient, the Recipient need not return or destroy that information
     provided that it treats that information as confidential in accordance with
     paragraph 2 above.

4.   The Recipient (or any of its agents, representatives or advisers) may be
     required to disclose Confidential Information for the purposes of any
     judicial, administrative or governmental proceeding. In this case the
     Recipient will promptly notify the Existing Lender and the Borrower.
     However, if on legal advice the Recipient (or any of its agents,
     representatives or advisers) is compelled to make disclosure of
     Confidential Information or else stand liable for contempt or other censure
     or penalty, it is not under any obligation to delay disclosure (i) in order
     to notify the Existing Lender and the Borrower before disclosure, if giving
     that notice before disclosure is not practicable, or (ii) once it has
     notified the Existing Lender and the Borrower, for any reason whatever.

5.   Any questions concerning the Confidential Information must be directed by
     the Recipient exclusively to the Existing Lender. The Recipient will not
     approach the Borrower or any member of its group without prior written
     consent of the Existing Lender.

6.   The Recipient understands that the Existing Lender (and its agents,
     representatives or advisers) is not making any representation or warranty
     as to the accuracy or completeness of the Confidential Information, and
     neither, save to the extent set out in the Facility
<PAGE>

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                                                                  --------------

     Agreement, is the Borrower or any other member of the group of companies of
     which the Borrower is a member. The Existing Lender (for itself and on
     behalf of its agents, representatives and advisers and, save to the extent
     set out in the Facility Agreement, the Borrower and the other members of
     the group of companies of which the Borrower is a member) disclaims any and
     all liability arising from the Recipient's use of the Confidential
     Information.

7.   The obligations imposed on the parties under this confidentiality agreement
     will terminate on the date two years after the date on which the Recipient
     signs this confidentiality agreement below.

8.   This confidentiality agreement shall be governed by and construed in
     accordance with English law, and the Recipient hereby irrevocably submits
     for the benefit of the Existing Lender, the Borrower and the other members
     of the group of companies of which the Borrower is a member to the
     jurisdiction of the courts of England in connection with any dispute
     related to or brought under it.

 ...............................................
For and on behalf of
[Existing Lender] (on its own
behalf and as trustee for the
benefit of the Borrower and the
other members of the group
of companies of which the
Borrower is a member)


 ...............................................
For and on behalf of
[Recipient]

Date .......................................
<PAGE>

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                                                                  --------------

                                  SCHEDULE 8:
                     FORM OF OPINION OF SLAUGHTER AND MAY


Credit Suisse First Boston,

Five Cabot Square,

London, E14 4QR.


for itself as Agent and for the Lenders

(as defined in the Loan Agreement referred to below)



Dear Sirs,

INTRODUCTION

1.   We refer to:

     (B)  the "LOAN AMENDMENT AGREEMENT", being the loan amendment agreement
          dated [ ] June, 1999 and made between (1) Castle Transmission
          International Ltd. (formerly known as Castle Transmission Services
          Ltd.) (the "BORROWER"), (2) Castle Transmission Services (Holdings)
          Ltd. (the "PARENT") and Millennium Communications Limited
          ("MILLENNIUM") (both known as the "GUARANTORS"), (3) the Lenders
          listed in Schedule 1 to the Loan Amendment Agreement (the "LENDERS"),
          (4) Credit Suisse First Boston as lead arranger, (5) [ ] as arrangers
          and (6) Credit Suisse First Boston as agent, amending the
          (Pounds)162,500,000 term and revolving facilities agreement dated 28th
          February, 1997 as amended to a (Pounds)64,000,000 revolving facilities
          agreement on 21st May, 1997 and as acceded to by Millennium with
          effect from 27th October, 1998 (the "LOAN AGREEMENT");

     (C)  the "SUPPLEMENTAL AND AMENDMENT DEED", being the supplemental and
          amendment deed dated [ ] June, 1999 made between (1) the Borrower, (2)
          the Parent, (3) Millennium, and (4) Credit Suisse First Boston as
          agent, amending the debenture dated 28th February, 1997 which was made
          between the same parties (except Millennium) and acceded to by
          Millennium with effect from 27th October, 1998 (the "DEBENTURE"); and

     (D)  the "DEPOSIT CHARGE AMENDMENT AGREEMENT" being the deposit charge
          amendment agreement dated [ ] June, 1999 amending the deposit
          agreement and charge on cash deposits dated 28th February, 1997, as
          amended on 21st May, 1997, made between (1) Credit Suisse First Boston
          (as trustee for the Lenders) and (2) the Borrower (the "DEPOSIT CHARGE
          AGREEMENT").

2.   Terms and expressions defined in the Loan Amendment Agreement, the
     Supplemental and Amendment Deed and the Deposit Charge Amendment Agreement
     (the "DOCUMENTS") which are not otherwise defined in this opinion have the
     same meanings when used in this opinion.
<PAGE>

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                                                                  --------------

3.   We have acted as English legal advisers on your behalf in connection with
     the Documents.

4.   This letter sets out our opinion on certain matters of English law as at
     today's date.  We have not made any investigation of, and do not express
     any opinion on, any other law. This letter is to be construed in accordance
     with English law.

DOCUMENTS AND INVESTIGATIONS
- ----------------------------

5.   For the purposes of this letter, we have examined the following:

     (A)  A signed copy of the Loan Amendment Agreement and the Deposit Charge
          Amendment Agreement and an executed copy of the Supplemental and
          Amendment Deed.

     (B)  A copy of each of the Loan Agreement, the Debenture, and the Deposit
          Charge Agreement (in each case, in the form in effect immediately
          before the signing and execution of the Documents).

     (C)  A copy, certified by the company secretary of the Borrower to be a
          true, complete and up-to-date copy, of the Memorandum and Articles of
          Association of the Borrower.

     (D)  A copy, certified by the company secretary of the Parent to be a true,
          complete and up-to-date copy, of the Memorandum and Articles of
          Association of the Parent.

     (E)  A copy, certified by the company secretary of Millennium to be a true,
          complete and up-to-date copy, of the Memorandum and Articles of
          Association of Millennium.

     (F)  A copy, certified by the company secretary of the Borrower to be a
          true, complete and up-to-date copy, of resolutions of a meeting of the
          board of directors of the Borrower held on [          ], 1999.

     (G)  A copy, certified by the company secretary of the Parent to be a true,
          complete and up-to-date copy, of resolutions of a meeting of the board
          of directors of the Parent held on [              ], 1999.

     (H)  A copy, certified by the company secretary of Millennium to be a true,
          complete and up-to-date copy, of resolutions of a meeting of the board
          of directors of Millennium held on [              ], 1999.

     (I)  The entries shown on the microfiches (obtained by us from Companies
          House, London on [      ] June, 1999) of the file of each of the
          Borrower, the Parent and Millennium maintained at Companies House (the
          "MICROFICHES").

     (J)  The certificates (the "MILLENNIUM SHARE CERTIFICATES") in respect of
          the shares (the "MILLENNIUM SHARES") held by the Borrower in
          Millennium.

ASSUMPTIONS
- -----------

6.   For the purposes of this letter, we have assumed each of the following:


     (A)  (i)   The information disclosed by the Microfiches, by our searches on
               [       ] June, 1999 of the Companies House database (CH Direct)
               and by our [telephone][personal] search on [     ] June, 1999 at
               the Central Registry of Winding-up Petitions in relation to the
               Borrower, the Parent and Millennium was then accurate and
               complete and has not since then been altered or added to.
<PAGE>

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                                                                  --------------

          (ii) The Microfiches and such enquiries did not fail to disclose any
               information relevant for the purposes of this opinion.

     (B)  The board minutes referred to in sub-paragraphs 5(F), (G) and (H)
          truly record the proceedings described therein of duly convened,
          constituted and quorate meetings of the boards of directors of each of
          the Borrower, the Parent and Millennium, respectively, these boards of
          directors were acting in the best interests and for the proper
          purposes of the Borrower, the Parent and Millennium, and the meetings
          were duly held and the resolutions passed and authorisations given at
          those meetings have not subsequently been amended, revoked or
          superseded.

     (C)  None of the Borrower, the Parent or Millennium has passed any
          voluntary winding up resolution, no petition has been presented or
          order made by a court for the winding up, dissolution or
          administration of the Borrower, the Parent or Millennium and no
          receiver, administrative receiver, trustee, administrator or similar
          officer has been appointed in relation to the Borrower, the Parent or
          Millennium or any of their assets or revenues.

     (D)  Each of the parties to the Documents (other than the Borrower, the
          Parent and Millennium) has the capacity, power and authority to sign
          or execute and deliver the Documents and to exercise its rights and
          perform its obligations under the Documents.

     (E)  All documents submitted to us as copies conform with the originals.

     (F)  All signatures are genuine.

     (G)  Each of the Documents has been duly signed or executed and
          unconditionally delivered by each of the parties thereto.

     (H)  That no law of any jurisdiction outside England would render such
          execution or delivery illegal or ineffective and that, in so far as
          any obligation under the Documents falls to be performed in, or is
          otherwise subject to, any jurisdiction other than England, its
          performance will not be illegal or ineffective by virtue of the law of
          that jurisdiction.

     (I)  The Supplemental and Amendment Deed and the Deposit Charge Amendment
          Agreement will be delivered for registration with the Registrar of
          Companies in accordance with Part XII of the Companies Act 1985 as
          recommended in paragraph 8(A) below, and that the Supplemental and
          Amendment Deed will be delivered for registration with H.M. Land
          Registry as recommended in paragraph 8(B) below.

     (J)  The execution and delivery of the Loan Amendment Agreement, the
          Supplemental and Amendment Deed by each of the Borrower, the Parent
          and Millennium is (i) in the furtherance of the objects authorised by
          the Parent's and Millennium's memorandum of association, and (ii) to
          the commercial advantage and in the interests of the Borrower, the
          Parent and Millennium.

     (K)  All matters set out as assumptions and contained in paragraph 6 of the
          opinion set out in a letter to you of 28th February, 1997 and in
          paragraph 6 of the opinion set out in a letter to you of 21st May,
          1997.

     (L)  That the Millennium Shares have been duly transferred by Crown Castle
          International Corporation ("CCIC") to the Borrower and that CCIC was
          immediately before such transfer, and the Borrower is, immediately
          after such transfer, the absolute legal and beneficial owner of the
          Millennium Shares.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

     (M)  That the Millennium Share Certificates are the only certificates in
          respect of the Millennium Shares and that the Millennium Shares
          referred to in those Millennium Share Certificates represent the whole
          of the issued share capital of Millennium.

OPINION
- -------

7.   Based on and subject to the foregoing, and subject to the reservations
     mentioned in paragraph 8 (below) and to any matters not disclosed to us, we
     are of the opinion that:

     (A)  Each of the Borrower, the Parent and Millennium is a limited liability
          company duly incorporated and validly existing under English law and
          has all requisite corporate power and authority to enter into and
          perform its obligations under the Documents to which it is a party.

     (B)  All necessary corporate action required to authorise the execution,
          delivery and performance by each of the Borrower, the Parent and
          Millennium of the Documents to which it is a party has been taken.

     (C)  The Loan Agreement (as amended by the Loan Amendment Agreement,
          together the "AMENDED LOAN AGREEMENT"), the Debenture (as amended by
          the Supplemental and Amendment Deed, together the "AMENDED DEBENTURE")
          and the Deposit Charge Agreement (as amended by the Deposit Charge
          Amendment Agreement, together the "AMENDED DEPOSIT CHARGE AGREEMENT")
          create valid and binding obligations under English law of the Borrower
          and (as regards the Amended Loan Agreement and the Amended Debenture)
          of the Parent and Millennium.

     (D)  The following security rights have, among others, been created by the
          Amended Debenture:

          (i)   a legal mortgage over each of the real properties described in
                Schedule 1 to the Amended Debenture;

          (ii)  an equitable fixed charge over the other real property of the
                Borrower, the Parent and Millennium;

          (iii) an equitable fixed charge over the Millennium Shares and the
                shares in the Borrower held by the Parent (together with the
                Millennium Shares, the "SHARES");

          (iv)  an equitable fixed charge over the Borrower's rights to payment
                under or in connection with the Transmission Agreements;

          (v)   an equitable fixed charge over the sums standing from time to
                time to the credit of the Account (as defined in the Amended
                Deposit Charge Agreement); and

          (vi)  a floating charge over the undertaking, property and assets of
                the Borrower, the Parent and Millennium.

     (E)  It is not necessary, in order to ensure the validity of the Documents
          or the security referred to therein to obtain any authorisation,
          consent, approval, licence or permission of, or to effect any filing,
          declaration or registration with, any governmental authority of
          England, save as provided in paragraphs 8(A) and (B) below.

RESERVATIONS
- ------------

8.   Our reservations are as follows:
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

     (A)  A company registered under the Companies Act 1985 (the "ACT") must, in
          order to ensure that certain classes of security over its assets are
          not rendered void against the liquidator or any creditor of the
          company, deliver the instrument creating or evidencing the security,
          together with the prescribed particulars thereof, to the Registrar of
          Companies for registration within 21 days after the creation of such
          security.  Each of the Borrower and the Parent and Millennium is
          registered under the Act. The classes of security which must be
          registered include a charge on land, a charge on book debts and a
          floating charge on the company's undertaking or property.  In respect
          of a charge on shares, although the better view is that a fixed charge
          over shares is not included in the classes of security which must be
          registered, it is recommended that registration of such a charge
          should be effected because it could constitute a charge on book debts
          (namely the dividends arising under the shares).  There is no
          procedure under the Act for registering variations to prescribed
          particulars delivered to the Registrar of Companies under the Act.
          However, we would recommend that details of the Supplemental and
          Amendment Deed and the Deposit Charge Amendment Agreement (together
          with an original executed copy of the Supplemental and Amendment Deed
          and of the Deposit Charge Amendment Agreement) be submitted to the
          Registrar of Companies for registration.

     (B)  Prior to the registration at H.M. Land Registry of a charge by way of
          legal mortgage created over property registered at H.M. Land Registry,
          that charge takes effect in equity only.  In order that the mortgagee
          obtains the rights and powers of a legal mortgage, the charge would
          need to be delivered for registration at H.M. Land Registry, together
          with a duly completed application form and fee and the relevant land
          or charge certificate, and the mortgagee would need to be registered
          as proprietor of such charge.  The registration at H.M. Land Registry
          of the charge by way of legal mortgage created over the property set
          out in Part 1 of Schedule 1 to the Amended Debenture has already been
          effected.  However, because the Supplemental and Amendment Deed varies
          the Debenture we would recommend that an original executed copy of the
          Supplemental and Amendment Deed be submitted to H.M. Land Registry for
          registration.  The execution of the Supplemental and Amendment Deed
          will, in any event, require registration at H.M. Land Registry to be
          made in respect of the charge by way of legal mortgage created over
          the property set out in Part 2 of Schedule 1 to the Amended Debenture.
          The Agent will not have, and may not exercise, any of the powers
          conferred by English law on the owner of a legal mortgage of the Land
          described in Part 2 of Schedule 1 to the Amended Debenture until the
          Agent is registered as the proprietor of the Amended Debenture in
          respect of that Land at H.M. Land Registry.  This will trigger a
          statutory requirement that an application for first registration be
          made at H.M. Land Registry in respect of those properties set out in
          Part 2 of Schedule 1 to the Amended Debenture which are of
          unregistered land.

     (C)  The security interest in the Shares constituted by the Amended
          Debenture is not proposed to be perfected by the registration of the
          Shares in the name of the Agent or its nominee.  That security
          interest therefore constitutes only an equitable charge and, as such,
          is not as favourable to the Agent or the Lenders as a perfected legal
          charge and suffers from the disadvantages inherent in equitable (as
          opposed to legal) charges.  In particular, but without prejudice to
          the foregoing, such an equitable charge may be defeated if the Shares
          are disposed of to a person who acquires the legal title to the Shares
          in good faith for value without notice (actual or constructive) of the
          equitable charge.  The risk of the above occurring is somewhat reduced
          so long as the share certificates relating to the Shares are held by
          the Agent or a nominee of the Agent and replacement certificates
          therefor are not issued.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

          We recommend, nonetheless, that the Shares are not registered in the
          name of the Agent or its nominee.  If they were there is a risk that
          the Agent and the Lenders could be construed as being "connected" with
          the Parent for the purposes of Section 249 of the Insolvency Act 1986.
          This would have a number of disadvantageous consequences under that
          Act.

     (D)  Floating charges are subject to a number of disadvantages which do not
          apply to fixed charges.  In particular:

          (i)   a floating charge created by a company within twelve months of
                the commencement of its winding up is, unless it is proved that
                the company is solvent immediately after the creation of the
                charge, invalid except to the amount of any cash paid to the
                company at the time of or subsequent to the creation of, and in
                consideration for, the floating charge together with interest
                thereon at a prescribed rate;

          (ii)  a floating charge is, on enforcement, subject to the rights of,
                and accordingly ranks after, unsecured but statutorily preferred
                creditors such as the Inland Revenue; and

          (iii) a fixed charge created after the creation of, and over the same
                assets as, a floating charge may rank ahead of the floating
                charge unless the floating charge contains a prohibition on the
                creation of other charges ranking prior thereto or pari passu
                therewith and the holder of the fixed charge has actual notice
                of such prohibition at the time of taking his charge.

     (E)  We express no opinion as to whether any of the charges created by the
          Amended Debenture and the Amended Deposit Charge Agreement will amount
          to fixed rather than floating charges.  Despite being expressed in
          words which would suffice to create a fixed charge, an English court
          would treat security as a floating charge where effective control of
          the charged assets has not been transferred to the person holding the
          benefit of the security, for example where it appears that it was
          intended that the person granting the charge over the charged assets
          should have the licence to dispose of those charged assets in the
          ordinary course of its business.

     (F)  We express no opinion as to the priority of the security interests
          under or referred to in the Amended Debenture or the Amended Deposit
          Charge Agreement, whether as regards other security that may already
          exist at the time of the creation of the relevant security interest
          under the Amended Debenture or the Amended Deposit Charge Agreement or
          as regards security that may be created thereafter.   So far as the
          latter is concerned, English law is unclear as to priority where a
          subsequent charge is created and further advances are subsequently
          made in reliance of the prior charge.

     (G)  We express no opinion as to the title of the Borrower, the Parent or
          Millennium to the assets to be subject to the security created by the
          Amended Debenture and the Amended Deposit Charge Agreement.  We would,
          however, refer you to:

          (i)   the Report prepared by us dated 23rd January, 1997 in respect of
                the Certificate of Title issued by Linklaters & Paines,
                solicitors for the British Broadcasting Corporation, dated 27th
                September, 1996 (as amended by the Supplemental Certificate
                dated 22nd January, 1997); and

          (ii)  the Report prepared by us dated [ ] June, 1999 in respect of the
                Certificate of Title issued by Norton Rose, solicitors for the
                Borrower, dated [ ] June, 1999.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

     (H)  We express no opinion as to the efficacy of the Amended Debenture in
          so far as it relates to assets which are situated or deemed to be
          situated outside England and Wales or are subject to any law other
          than English law.  Furthermore, we have not made any investigation of
          the assets which are subject to the floating charges created by the
          Amended Debenture and accordingly our opinions set out above must be
          read subject to any limitations or qualifications which may be
          necessary as a result of the nature of, or any matter relating to,
          such assets.

     (I)  Rights and obligations under the Amended Loan Agreement, the Amended
          Debenture and the Amended Deposit Charge Agreement will be subject to
          any law from time to time in force relating to insolvency, liquidation
          or administration or any other law or legal procedure affecting
          generally the enforcement of creditors' rights.

     (J)  In so far as any obligation under the Amended Loan Agreement, the
          Amended Debenture or the Amended Deposit Charge Agreement is to be
          performed in any jurisdiction other than England, an English court may
          have to have regard to the law of that jurisdiction in relation to the
          manner of performance and the steps to be taken in the event of non-
          performance or defective performance.

     (K)  We express no opinion as to whether the equitable remedies of specific
          performance or injunctive relief would be available in respect of any
          obligation of the Borrower or the Parent. These remedies are subject
          to the discretion of the English courts.

     (L)  We express no opinion as to the validity or the binding effect of the
          obligations as set out in Clause 13.1 of the Amended Loan Agreement
          which provide for the payment of interest on overdue amounts.  An
          English court would not give effect to such provisions if it could be
          established that the amount expressed as being payable was such that
          such a clause was in the nature of a penalty (that is to say a
          requirement for a stipulated sum to be paid irrespective of, or
          necessarily greater than, the loss likely to be sustained).

     (M)  Clause 15.6 of the Amended Loan Agreement provides that the
          obligations of the Guarantors will not be affected by any change,
          waiver or release of the Borrower's obligations under the Amended Loan
          Agreement. We express no opinion whether this will be effective where
          the Guarantors have not agreed to that change, waiver or release.

     (N)  Clause 15.8 of the Amended Loan Agreement restricts the taking of
          security and the exercise by the Guarantors of certain rights in
          connection with the obligations of the Guarantors under Clause 15 of
          the Amended Loan Agreement. This is reinforced by the provision that
          the Guarantors will hold on trust for the agent and the lenders all
          amounts received in respect of a proof for amounts due to it by the
          Borrower or any other Guarantor.  We express no opinion as to the
          effectiveness of the trust itself.

     (O)  We express no opinion on Clause 26.1 of the Amended Loan Agreement.
          Any term of the Amended Loan Agreement may in certain circumstances be
          waived or amended other than in writing.

     (P)  We express no opinion as to the validity or binding effect of
          provisions set out in Clause 27 of the Amended Debenture and Clause 15
          of the Amended Deposit Charge Agreement relating to invalidity and
          severability.

     (Q)  There could be circumstances in which an English court would not treat
          as conclusive those certificates and determinations which the Amended
          Loan Agreement and the Amended Deposit Charge Agreement provide are to
          be
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

          conclusive, for example if it could be shown that a certificate or
          determination had an unreasonable or arbitrary basis or was not made
          in good faith.

     (R)  We express no opinion on European Union law as it affects any
          jurisdiction other than England.

RELIANCE
- --------

9.   This opinion is addressed to you for your own benefit and as agent for and
     on behalf of the Lenders in connection with the Amended Loan Agreement, the
     Amended Debenture and the Amended Deposit Charge Agreement.  It may not be
     relied upon by any person other than yourselves or the Lenders or used for
     any other purpose and, without our prior written consent, neither its
     contents nor its existence may be disclosed to any other person.


                               Yours faithfully,
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                                  SCHEDULE 9:
                       FORM OF OVERDRAFT BANK AGREEMENT

                           OVERDRAFT BANK AGREEMENT

DATE :

PARTIES

1.   [                       ] of [                       ]
     (the "OVERDRAFT BANK")

2.   [                                ] a company incorporated in England
     (number [                   ]) whose registered office is at [Warwick
     Technology Park, Gallows Hill, Heathcote Lane, Warwick CV34 6TN], on its
     own behalf and on behalf of each of the existing Guarantors (each as
     defined in the Loan Agreement referred to below) (the "OVERDRAFT
     BORROWER")/1/

3.   CREDIT SUISSE FIRST BOSTON (the "AGENT"), on its own behalf and on behalf
     of each of  the Lenders (as defined in the Loan Agreement)

BACKGROUND

A Loan Agreement (the "LOAN AGREEMENT") was made on 28th February, 1997 (and
amended on 21st May, 1997 and on [                          ]) between (1)
Castle Transmission International Ltd. as borrower, (2) Castle Transmission
Services (Holdings) Ltd. as guarantor, (3) the lenders named in the Loan
Agreement, (4) Credit Suisse First Boston as Agent and others.  Under the terms
of the Loan Agreement the Lenders agreed to provide to Castle Transmission
International Ltd.  a (Pounds)150,000,000 credit facility.

The Overdraft Bank has provided overdraft facilities (the "OVERDRAFT
FACILITIES") to the Overdraft Borrower and wishes the Overdraft Borrower's
obligations under those Overdraft Facilities to be secured by the Charges.

The parties agree as follows:

1.   INTERPRETATION

     Unless a contrary intention is indicated, words and expressions defined in
     the Loan Agreement and which are not defined in this Agreement will have
     the same meanings when used in this Agreement.  References to the Loan
     Agreement are to that agreement as amended or supplemented.

2.   UNDERTAKINGS OF THE OVERDRAFT BANK

     The Overdraft Bank agrees that:

     (A)  The Overdraft Bank has delivered to the Agent a copy of the document
          (if any exists) describing the terms of the Overdraft Facilities.

     (B)  The Overdraft Bank will notify the Agent of the termination or breach
          of the Overdraft Facilities (or any event which, upon the giving of
          notice, lapse of time or both would give cause for a termination of
          the Overdraft Facilities).


- ---------------
/1/ Insert details of relevant entity which must be the Borrower or any
     Restricted Subsidiary.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

3.   SECURITY

     By virtue of the execution of this Agreement the amounts due by the
     Overdraft Borrower under the Overdraft Facilities become secured under the
     Charges.  Only a maximum of (Pounds)[       ]/2/ of the amount outstanding
     under the Overdraft Facilities will, however, rank equally with amounts
     outstanding under the Loan Agreement.  The remainder, if any, will rank
     behind.

4.   THE AGENT

4.1  APPOINTMENT

     The Agent is appointed as an agent by the Overdraft Bank.  The Agent is not
     acting as agent of any Company under this Agreement.

4.2  AUTHORITY

     The Agent is authorised to exercise the rights, powers, discretions and
     duties which are specified by the Financing Documents.  The Agent may also
     act in a manner reasonably incidental to these matters.

4.3  DUTIES

     In addition to the obligations of the Agent set out elsewhere in the
     Financing Documents the Agent agrees as follows:

     (A)  NOTICES:  The Agent will as soon as reasonably practicable notify the
          Overdraft Bank of the contents of each notice received from a Company
          under the terms of a Financing Document.  If the notice does not
          affect the Overdraft Bank the Agent may elect not to notify the
          Overdraft Bank.

     (B)  OTHER DOCUMENTS:  When a Company delivers to the Agent any other
          document required to be delivered under a Financing Document the Agent
          will as soon as reasonably practicable provide a copy to the Overdraft
          Bank.  The Overdraft Borrower agrees to reimburse the Agent for the
          costs of preparing any copies required for this purpose.

     (C)  TERMINATION EVENTS:  The Agent will notify the Overdraft Bank of any
          Termination Event or Potential Termination Event.  This obligation
          will not arise, however, until the Agent receives express notice with
          reasonable supporting evidence of the Termination Event or Potential
          Termination Event.  Until this time the Agent is entitled to assume
          that there is no Termination Event or Potential Termination Event.
          The Agent is not required to make inquiries.  Information referred to
          in Clause 4.11 does not have to be disclosed under this sub-clause.

     The duties under this sub-clause will be discharged if the Agent performs
     the corresponding duties to the Overdraft Bank or its affiliate in is
     capacity as a Lender.

4.4  POWERS

     In addition to the powers of the Agent set out elsewhere in the Financing
     Documents the Agent has the following powers:

(A)  PROFESSIONAL ADVISERS:  The Agent may instruct professional advisers to
     provide advice in connection with this Agreement and the Overdraft
     Facilities.

- ----------
/2/ The aggregate maximum amount included in this space for all Overdraft Banks
    must not exceed (Pounds)5,000,000.  See Clause 19.1(K)(i).
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

     (B)  AUTHORITY FROM INSTRUCTING GROUP: The Agent may take any action which
          is not inconsistent with the Financing Documents and which is
          authorised by an Instructing Group.

     (C)  VIEWS OF INSTRUCTING GROUP: In exercising any of its rights, powers or
          discretions the Agent may seek the views of an Instructing Group. If
          it exercises those rights, powers or discretions in accordance with
          those views the Agent will incur no liability.

     (D)  PROCEEDINGS: The Agent may institute legal proceedings against a
          Company in the name of the Overdraft Bank if the Overdraft Bank
          authorises it to take those proceedings.

     (E)  COMPLIANCE WITH LAW: The Agent may take any action necessary for it to
          comply with applicable laws.

     The Agent is not required to exercise any of these powers and will incur no
     liability if it fails to do so.  In the context of legal proceedings the
     Agent may decline to take any step until it has received indemnities or
     security satisfactory to it.

4.5  RELIANCE

     The Agent is entitled to rely upon each of the following:

     (A)  Advice received from professional advisers.

     (B)  A certificate of fact received from a Company and signed by an
          Authorised Person.

     (C)  Any communication or document believed by the Agent to be genuine.
          The Agent will not be liable for any of the consequences of relying on
          these items.

4.6  EXTENT OF AGENT'S DUTIES

     (A)  NO OTHER DUTIES: The Agent has no obligations or duties other than
          those expressly set out in this Agreement, the Financing Documents and
          the other Overdraft Bank Agreements.

     (B)  ILLEGALITY AND LIABILITY: The Agent is not obliged to do anything
          which is illegal or which may expose it to liability to any person.

     (C)  NOT TRUSTEE: The Agent is not acting as a trustee for any purpose in
          connection with this Agreement, except for its role described in
          Clause 4.13, 4.14 and 4.15.

4.7  RESPONSIBILITY OF THE OVERDRAFT BANK

     The Overdraft Bank is responsible for its own decision to become involved
     in the Overdraft Facilities and its decision to take or not take action
     under the Overdraft Facilities.  It should make its own credit appraisal of
     the Overdraft Borrower and the terms of the Overdraft Facilities.  The
     Agent makes no representation that any information provided to the
     Overdraft Bank before or after the date of this Agreement is true.
     Accordingly the Overdraft Bank should take whatever action it believes is
     necessary to verify that information.  In addition the Agent is not
     responsible for the legality, validity or adequacy of any Financing
     Document or the efficacy of the Security under the Charges.  The Overdraft
     Bank will satisfy itself on these issues.
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

4.8  LIMITATION OF LIABILITY

     (A)  AGENT: The Agent will not be liable to the Overdraft Bank for any
          action or non-action under or in connection with the Financing
          Documents unless caused by its gross negligence or wilful misconduct.

     (B)  DIRECTORS, EMPLOYEES AND AGENTS: No director, employee or agent of the
          Agent will be liable to the Overdraft Bank in relation to the
          Financing Documents. The Overdraft Bank agrees not to seek to impose
          this liability upon them.

4.9  BUSINESS OF THE AGENT

     Despite its role as agent of the Overdraft Bank the Agent may:

     (A)  participate as a Lender in the Facilities or as a Hedging Bank or an
          Overdraft Bank,

     (B)  carry on all types of business with any Company, and

     (C)  act as agent for other groups of lenders to any Company or other
          borrowers.

4.10 INDEMNITY

     The Overdraft Bank agrees to reimburse the Agent for all losses and
     expenses incurred by the Agent as a result of its appointment as Agent or
     arising from its activities as Agent in relation to this Agreement. These
     losses and expenses will take into account amounts reimbursed to the Agent
     by the Overdraft Borrower. The Overdraft Bank is not liable for losses and
     expenses arising from the gross negligence or willful misconduct of the
     Agent.

4.11 CONFIDENTIAL INFORMATION

     The Agent is not required to disclose to the Overdraft Bank any
     information:

(A)  which is not received by it in its capacity as Agent, or
(B)  which it receives, with its consent, on a confidential basis.
4.12 RESIGNATION AND REMOVAL

     The Agent may resign or be removed in accordance with the terms of the Loan
     Agreement.  In this case the Overdraft Bank agrees to co-operate, to the
     extent reasonably necessary, with the transfer of function to a new Agent.

4.13 OBLIGATION TO PAY TO THE AGENT

     The Overdraft Borrower agrees to pay to the Agent on demand each amount due
     and payable by the Overdraft Borrower to the Overdraft Bank under the
     Overdraft Facilities.  This obligation will be satisfied to the extent that
     the amount is paid to the Overdraft Bank.  It does not affect the rights of
     the Overdraft Bank or the obligations of the Overdraft Borrower to the
     Overdraft Bank.  A payment of an amount under this sub-clause will,
     however, satisfy the Overdraft Borrower's obligation to pay that amount to
     the Overdraft Bank.

4.14 HOLDING AS SECURITY TRUSTEE

     The Agent agrees that it holds the benefit of:

     (A)  Clause 4.13; and

     (B)  the Charges and all Security arising from the Charges,

<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------
          as trustee on behalf of:

          (i)    the Lenders;

          (ii)   each Hedging Bank which executed a Hedging Bank Agreement in
                 accordance with Clause 20.1(CC); and

          (iii)  each Overdraft Bank.

     All the Agent's rights and claims arising under the items mentioned in
     paragraphs (A) and (B) are vested in it on this basis.

4.15 SECURITY

     (A)  PERFECTION OF SECURITY AND TITLE:  The Agent:

          (i)    is not liable for any failure, omission or defect in perfecting
                 the Security constituted by any Charge;

          (ii)   may accept without enquiry the title to the property over which
                 Security is intended to be created by any Charge.

     (B)  CUSTODY: The Agent is not under any obligation to hold any title
          deeds, security documents or any other documents in connection with
          the property charged by any Charge or to take any steps to protect or
          preserve these documents. The Agent may permit a Company to retain all
          these documents in its possession or may deposit them with a nominee
          or custodian. This paragraph does not apply to documents held in
          relation to a legal mortgage over, or over an interest in, real
          property or shares.

5.   NOTICES

     Any notice to be delivered to the Overdraft Bank may be delivered to it, or
     its affiliate, as a Lender in the manner described in the Loan Agreement.

6.   LAW

     This Agreement is to be governed by and construed in accordance with
     English law.


SIGNATURES


[Name of Overdraft Bank]

By:


[Name of Overdraft Borrower]

By:


[Name of Agent]

By:
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                                 SCHEDULE 10:
                        FORM OF HEDGING BANK AGREEMENT

                            HEDGING BANK AGREEMENT

DATE :

PARTIES

1.   [                                 ] of [
     ] (the "HEDGING BANK")

2.   CASTLE TRANSMISSION INTERNATIONAL LTD., a company incorporated in England
     (number 3196207) whose registered office is at Warwick Technology Park,
     Heathcote Lane, Warwick CV34 5DS, on its own behalf and on behalf of each
     of the existing Guarantors (each as defined in the Loan Agreement referred
     to below)

3.   CREDIT SUISSE FIRST BOSTON (the "AGENT"), on its own behalf and on behalf
     of each of  the Lenders (as defined in the Loan Agreement)

BACKGROUND

A Loan Agreement (the "LOAN AGREEMENT") was made on 28th February, 1997 (and
amended on 21st May, 1997 and on [                 ]) between (1) Castle
Transmission International Ltd. as borrower, (2) Castle Transmission Services
(Holdings) Ltd. as guarantor, (3) the lenders named in the Loan Agreement, (4)
Credit Suisse First Boston as Agent and others. Under the terms of the Loan
Agreement the Lenders agreed to provide to the Borrower a (Pounds)150,000,000
credit facility.

The Hedging Bank has entered into a Hedging Contract with the Borrower and
wishes the Borrower's obligations under that Hedging Contract to be secured by
the Charges.

The parties agree as follows:

1.   INTERPRETATION

     Unless a contrary intention is indicated, words and expressions defined in
     the Loan Agreement and which are not defined in this Agreement will have
     the same meanings when used in this Agreement.  References to the Loan
     Agreement are to that agreement as amended or supplemented.

2.   UNDERTAKINGS OF THE HEDGING BANK

     The Hedging Bank agrees that:

     (A)  The Hedging Contract complies with the requirements of Schedule 11 to
          the Loan Agreement.

     (F)  The Hedging Bank will notify the Agent of the termination or breach of
          the Hedging Contract (or any event which, upon the giving of notice,
          lapse of time or both would give cause for a termination of the
          Hedging Contract).

     (G)  The Hedging Bank has delivered to the Agent a copy of the Hedging
          Contract. It will deliver to the Agent copies of all confirmations
          under the Hedging Contract. Before entering into a transaction which
          is to be incorporated in the Hedging Contract the Hedging Bank will
          use reasonable endeavours to ensure that:

         (i)    the proposed transaction will not cause the Borrower to be in
                default under Clause 20.1(CC) of the Loan Agreement; and
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

          (ii)  the transaction forms part of the implementation of the Hedging
                Policy.

          This obligation may be discharged by the Hedging Bank receiving a
          certificate from the Borrower to this effect.

     (H)  If an Event of Default (as described in the Hedging Contract) occurs
          and is continuing under the Hedging Contract, the Agent (acting on the
          instructions of an Instructing Group) shall be entitled, by notice in
          writing to the Hedging Bank and the Borrower, to require the Hedging
          Contract to be terminated and closed out in accordance with its terms
          as soon as possible after the notice is given. If there is a net
          amount payable to the Borrower under the Hedging Contract upon its
          termination and close out, the Hedging Bank shall pay that net amount
          to the Agent to discharge amounts due under the Financing Documents,
          any other Hedging Contracts and the Overdraft Facilities, or (where no
          such amounts are due) into an account held with the Agent or a nominee
          of the Agent and charged to the Agent.

     (I)  Any waiver of a Termination Event given by the Agent under the Loan
          Agreement will be treated as given by the Hedging Bank in the same
          terms in respect of the equivalent Event of Default under the Hedging
          Contract.

3.   SECURITY

     By virtue of the execution of this Agreement the amounts due by the
     Borrower under the Hedging Contract with the Hedging Bank become secured
     under the Charges.

4.   THE AGENT

4.1  APPOINTMENT

     The Agent is appointed as an agent by the Hedging Bank.  The Agent is not
     acting as agent of any Company under this Agreement.

4.2  AUTHORITY

     The Agent is authorised to exercise the rights, powers, discretions and
     duties which are specified by the Financing Documents.  The Agent may also
     act in a manner reasonably incidental to these matters.

4.3  DUTIES

     In addition to the obligations of the Agent set out elsewhere in the
     Financing Documents the Agent agrees as follows:

     (A)  NOTICES:  The Agent will as soon as reasonably practicable notify the
          Hedging Bank of the contents of each notice received from a Company
          under the terms of a Financing Document.  If the notice does not
          affect the Hedging Bank the Agent may elect not to notify the Hedging
          Bank.

     (B)  OTHER DOCUMENTS:  When a Company delivers to the Agent any other
          document required to be delivered under a Financing Document the Agent
          will as soon as reasonably practicable provide a copy to the Hedging
          Bank.  The Borrower agrees to reimburse the Agent for the costs of
          preparing any copies required for this purpose.

     (C)  TERMINATION EVENTS:  The Agent will notify the Hedging Bank of any
          Termination Event or Potential Termination Event.  This obligation
          will not arise, however, until the Agent receives express notice with
          reasonable supporting evidence of the Termination Event or Potential
          Termination Event.  Until this time the Agent is entitled to assume
          that there is no Termination Event or Potential
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

          Termination Event. The Agent is not required to make inquiries.
          Information referred to in Clause 4.11 does not have to be disclosed
          under this sub-clause.

     The duties under this sub-clause will be discharged if the Agent performs
     the corresponding duties to the Hedging Bank or its affiliate in is
     capacity as a Lender.

4.4  POWERS

     In addition to the powers of the Agent set out elsewhere in the Financing
     Documents the Agent has the following powers:

     (A)  PROFESSIONAL ADVISERS: The Agent may instruct professional advisers to
          provide advice in connection with this Agreement and the Hedging
          Contract.

     (B)  AUTHORITY FROM INSTRUCTING GROUP: The Agent may take any action which
          is not inconsistent with the Financing Documents and which is
          authorised by an Instructing Group.

     (C)  VIEWS OF INSTRUCTING GROUP: In exercising any of its rights, powers or
          discretions the Agent may seek the views of an Instructing Group. If
          it exercises those rights, powers or discretions in accordance with
          those views the Agent will incur no liability.

     (D)  PROCEEDINGS: The Agent may institute legal proceedings against a
          Company in the name of the Hedging Bank if the Hedging Bank authorises
          it to take those proceedings.

     (E)  COMPLIANCE WITH LAW: The Agent may take any action necessary for it to
          comply with applicable laws.

     The Agent is not required to exercise any of these powers and will incur no
     liability if it fails to do so.  In the context of legal proceedings the
     Agent may decline to take any step until it has received indemnities or
     security satisfactory to it.

4.5  RELIANCE

     The Agent is entitled to rely upon each of the following:

     (A)  Advice received from professional advisers.

     (B)  A certificate of fact received from a Company and signed by an
          Authorised Person.

     (C)  Any communication or document believed by the Agent to be genuine.
          The Agent will not be liable for any of the consequences of relying on
          these items.

4.6  EXTENT OF AGENT'S DUTIES

     (A)  NO OTHER DUTIES: The Agent has no obligations or duties other than
          those expressly set out in this Agreement, the Financing Documents,
          any other Hedging Bank Agreements and the Overdraft Bank Agreements.

     (B)  ILLEGALITY AND LIABILITY: The Agent is not obliged to do anything
          which is illegal or which may expose it to liability to any person.

     (C)  NOT TRUSTEE: The Agent is not acting as a trustee for any purpose in
          connection with this Agreement, except for its role described in
          Clause 4.13, 4.14 and 4.15.
<PAGE>

4.7  RESPONSIBILITY OF THE HEDGING BANK

     The Hedging Bank is responsible for its own decision to become involved in
     the Hedging Contract and its decision to take or not take action under the
     Hedging Contract.  It should make its own credit appraisal of the Borrower
     and the terms of the Hedging Contract.  The Agent makes no representation
     that any information provided to the Hedging Bank before or after the date
     of this Agreement is true.  Accordingly the Hedging Bank should take
     whatever action it believes is necessary to verify that information.  In
     addition the Agent is not responsible for the legality, validity or
     adequacy of any Financing Document or the efficacy of the Security under
     the Charges.  The Hedging Bank will satisfy itself on these issues.

4.8  LIMITATION OF LIABILITY

     (A)  AGENT: The Agent will not be liable to the Hedging Bank for any action
          or non-action under or in connection with the Financing Documents
          unless caused by its gross negligence or wilful misconduct.

     (B)  DIRECTORS, EMPLOYEES AND AGENTS: No director, employee or agent of the
          Agent will be liable to the Hedging Bank in relation to the Financing
          Documents. The Hedging Bank agrees not to seek to impose this
          liability upon them.

4.9  BUSINESS OF THE AGENT

     Despite its role as agent of the Hedging Bank the Agent may:

     (A)  participate as a Lender in the Facilities or as a Hedging Bank or an
          Overdraft Bank,

     (B)  carry on all types of business with any Company, and

     (C)  act as agent for other groups of lenders to any Company or other
          borrowers.

4.10 INDEMNITY

     The Hedging Bank agrees to reimburse the Agent for all losses and expenses
     incurred by the Agent as a result of its appointment as Agent or arising
     from its activities as Agent in relation to this Agreement.  These losses
     and expenses will take into account amounts reimbursed to the Agent by the
     Borrower.  The Hedging Bank is not liable for losses and expenses arising
     from the gross negligence or willful misconduct of the Agent.

4.11 CONFIDENTIAL INFORMATION

     The Agent is not required to disclose to the Hedging Bank any information:

     (A)  which is not received by it in its capacity as Agent, or

     (B)  which it receives, with its consent, on a confidential basis.

4.12 RESIGNATION AND REMOVAL

     The Agent may resign or be removed in accordance with the terms of the Loan
     Agreement.  In this case the Hedging Bank agrees to co-operate, to the
     extent reasonably necessary, with the transfer of function to a new Agent.

4.13 OBLIGATION TO PAY TO THE AGENT

     The Borrower agrees to pay to the Agent on demand each amount due and
     payable by the Borrower to the Hedging Bank under the Hedging Contract.
     This obligation will be satisfied to the extent that the amount is paid to
     the Hedging Bank.  It does not affect the
<PAGE>

     rights of the Hedging Bank or the obligation of the Borrower to the Hedging
     Bank. A payment of an amount under this sub-clause will, however, satisfy
     the Borrower's obligation to pay that amount to the Hedging Bank.

4.14 HOLDING AS SECURITY TRUSTEE

     The Agent agrees that it holds the benefit of:

     (A)  Clause 4.13; and

     (B)  the Charges and all Security arising from the Charges, as trustee on
          behalf of:

          (i)   the Lenders;

          (ii)  each Hedging Bank which executes a Hedging Bank Agreement in
                accordance with Clause 20.1(CC)(ii) of the Loan Agreement; and

          (iii)  each Overdraft Bank.

     All the Agent's rights and claims arising under the items mentioned in
     paragraphs (A) and (B) are vested in it on this basis.

4.15 SECURITY

     (A)  PERFECTION OF SECURITY AND TITLE:  The Agent:

          (i)   is not liable for any failure, omission or defect in perfecting
                the Security constituted by any Charge;

          (ii)  may accept without enquiry the title to the property over which
                Security is intended to be created by any Charge.

     (B)  CUSTODY: The Agent is not under any obligation to hold any title
          deeds, security documents or any other documents in connection with
          the property charged by any Charge or to take any steps to protect or
          preserve these documents. The Agent may permit a Company to retain all
          these documents in its possession or may deposit them with a nominee
          or custodian. This paragraph does not apply to documents held in
          relation to a legal mortgage over, or over an interest in, real
          property or shares.

5.   NOTICES

     Any notice to be delivered to the Hedging Bank may be delivered to it, or
     its affiliate, as a Lender in the manner described in the Loan Agreement.

6.   LAW

     This Agreement is to be governed by and construed in accordance with
     English law.


SIGNATURES


[Name of Hedging Bank]

By:
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

Castle Transmission International Ltd.

By:


[Name of Agent]

By:
<PAGE>

                                                                  CONFORMED COPY
                                                                  --------------

                                 SCHEDULE 11:
                      REQUIREMENTS FOR HEDGING CONTRACTS

     Each Hedging Contract is to be on the terms of the International Swaps &
     Derivatives Association, Inc. ("ISDA") 1992 Master Agreement
     (Multicurrency-Cross Border) (the "ISDA AGREEMENT").  Each Hedging Contact
     will provide for, together with such other terms as the relevant Hedging
     Bank and the Borrower may agree and which do not conflict with, the
     following:

     (a)  Sections 5(a)(i) to (viii) of the ISDA Agreement not to apply as
          Events of Default with respect to the Borrower.  The Termination
          Events (as defined in the Loan Agreement) shall be the only Events of
          Default with respect to the Borrower for the purposes of the ISDA
          Agreement and, accordingly, the automatic termination provisions of
          Section 6(a) of the ISDA Agreement shall not be applicable.

     (b)  Any notice given pursuant to Section 5 or Section 6 of the ISDA
          Agreement to also be given contemporaneously to the Agent.

     (c)  If any Event of Default under the ISDA Agreement occurs (as referred
          to in paragraph (a) above) the relevant Hedging Bank to be entitled to
          designate a day as an Early Termination Date (by notice to the
          Borrower in accordance with Section 6(a) of the ISDA Agreement) only
          if all principal amounts outstanding under the Facilities are due and
          payable or if the Agent has cancelled the Facilities or demanded
          immediate repayment of the Loan under Clause 20.2 of this Agreement or
          required the Hedging Contract to be terminated under Clause 2(D) of
          the Hedging Bank Agreement with that Hedging Bank.  This notice must
          also be given to the Agent.

     (d)  No contractual rights of set-off to either party additional to such
          rights contained in the unamended form of the ISDA Agreement.

     (e)  Section 2(c)(ii) of the ISDA Agreement not to apply to any
          Transactions and thus payments under all Transactions under the same
          Hedging Contract to be made in the same currency on the same day shall
          be netted.

     (f)  An acknowledgement of the existence of this Agreement and the Charges.

     (g)  An election for "Second Method and Market Quotation" in the "Schedule"
          as the payment method applicable.

     (h)  The governing law to be English law.

     Terms used in this schedule have the meanings given to them in the ISDA
     Agreement or, where the context does not so permit, the meanings given to
     them in this Agreement.

<PAGE>

                                                                   EXHIBIT 10.36

================================================================================

                                $1,200,000,000

                               CREDIT AGREEMENT

                                     among

                        CROWN CASTLE OPERATING COMPANY,
                                 as Borrower,

                       CROWN CASTLE INTERNATIONAL CORP.,

                              The Several Lenders
                       from Time to Time Parties Hereto,

                           THE CHASE MANHATTAN BANK,
                           as Administrative Agent,

                    CREDIT SUISSE FIRST BOSTON CORPORATION
                                      and
                          KEY CORPORATE CAPITAL INC.,
                            as Syndication Agents,

                                      and

                           THE BANK OF NOVA SCOTIA,
                            as Documentation Agent

                          Dated as of March 15, 2000


================================================================================


                             CHASE SECURITIES INC.
                                      and
                    CREDIT SUISSE FIRST BOSTON CORPORATION,
               as Joint Lead Arrangers and Joint Book Managers.
<PAGE>

                               TABLE OF CONTENTS

                                                                            Page
                                                                            ----

SECTION 1. DEFINITIONS ......................................................  1
    1.1 Defined Terms .......................................................  1
    1.2 Other Definitional Provisions ....................................... 22

SECTION 2. AMOUNT AND TERMS OF COMMITMENTS .................................. 23
    2.1  Commitments; Increases in the Tranche A Term Facility and
         the Revolving Facility; Incremental Term Loans ..................... 23
    2.2  Procedure for Borrowing ............................................ 25
    2.3  Repayment of Loans; Early Maturity ................................. 25
    2.4  Swingline Commitment ............................................... 27
    2.5  Procedure for Swingline Borrowing; Refunding of Swingline Loans..... 27
    2.6  Commitment Fees, etc. .............................................. 28
    2.7  Termination or Reduction of Commitments ............................ 29
    2.8  Optional Prepayments ............................................... 29
    2.9  Mandatory Prepayments and Commitment Reductions .................... 29
    2.10 Conversion and Continuation Options ................................ 30
    2.11 Limitations on Eurodollar Tranches ................................. 31
    2.12 Interest Rates and Payment Dates ................................... 31
    2.13 Computation of Interest and Fees ................................... 31
    2.14 Inability to Determine Interest Rate................................ 32
    2.15 Pro Rata Treatment and Payments .................................... 32
    2.16 Requirements of Law ................................................ 34
    2.17 Taxes .............................................................. 35
    2.18 Indemnity .......................................................... 36
    2.19 Change of Lending Office ........................................... 37
    2.20 Replacement of Lenders ..............................................37

SECTION 3. LETTERS OF CREDIT ................................................ 37
    3.1 L/C Commitment ...................................................... 37
    3.2 Procedure for Issuance of Letter of Credit........................... 38
    3.3 Fees and Other Charges .............................................. 38
    3.4 L/C Participations .................................................. 38
    3.5 Reimbursement Obligation of the Borrower ............................ 39
    3.6 Obligations Absolute ................................................ 39
    3.7 Letter of Credit Payments ........................................... 40
    3.8 Applications ........................................................ 40

SECTION 4. REPRESENTATIONS AND WARRANTIES ................................... 40
    4.1 Financial Condition ................................................. 40
    4.2 No Change ........................................................... 41
    4.3 Corporate Existence; Compliance with Law ............................ 41
    4.4 Corporate Power; Authorization; Enforceable Obligations.............. 41
    4.5 No Legal Bar ........................................................ 42
    4.6 Litigation .......................................................... 42
    4.7 No Default .......................................................... 42
<PAGE>

                                                                            Page
                                                                            ----
    4.8  Ownership of Property; Liens ....................................... 42
    4.9  Intellectual Property .............................................. 42
    4.10 Taxes .............................................................. 42
    4.11 Federal Regulations ................................................ 43
    4.12 Labor Matters ...................................................... 43
    4.13 ERISA .............................................................. 43
    4.14 Investment Company Act; Other Regulations .......................... 43
    4.15 Subsidiaries ....................................................... 43
    4.16 Use of Proceeds .................................................... 44
    4.17 Environmental Matters .............................................. 44
    4.18 Accuracy of Information, etc ....................................... 44
    4.19 Security Interests ................................................. 45
    4.20 Solvency ........................................................... 45
    4.21 Year 2000 Matters .................................................. 45

SECTION 5. CONDITIONS PRECEDENT ............................................. 45
    5.1  Conditions to Initial Extension of Credit........................... 45
    5.2  Conditions to Each Extension of Credit.............................. 47

SECTION 6. AFFIRMATIVE COVENANTS ............................................ 48
    6.1  Financial Statements ............................................... 48
    6.2  Certificates; Other Information .................................... 49
    6.3  Payment of Obligations ............................................. 50
    6.4  Maintenance of Existence; Compliance ............................... 50
    6.5  Maintenance of Property; Insurance ................................. 50
    6.6  Inspection of Property; Books and Records; Discussions.............. 50
    6.7  Notices ............................................................ 51
    6.8  Environmental Laws ................................................. 51
    6.9  Interest Rate Protection ........................................... 52
    6.10 Additional Collateral, etc ......................................... 52
    6.11 Organizational Separateness ........................................ 53
    6.12 Australian Security Documents ...................................... 54
SECTION 7. NEGATIVE COVENANTS ............................................... 54
    7.1  Financial Condition Covenants ...................................... 54
    7.2  Indebtedness ....................................................... 55
    7.3  Liens .............................................................. 56
    7.4  Fundamental Changes ................................................ 58
    7.5  Disposition of Property ............................................ 58
    7.6  Restricted Payments ................................................ 59
    7.7  Investments ........................................................ 60
    7.8  Certain Payments and Modifications of Certain Agreements............ 61
    7.9  Transactions with Affiliates ....................................... 61
    7.10 Sales and Leasebacks ............................................... 61
    7.11 Changes in Fiscal Periods .......................................... 61
    7.12 Negative Pledge Clauses ............................................ 61
    7.13 Clauses Restricting Subsidiary Distributions........................ 62
    7.14 Lines of Business .................................................. 62
    7.15 Holding Company Status ............................................. 62

                                     -ii-
<PAGE>

                                                                            Page
                                                                            ----

    7.16  Communications Tower Facilities .................................   62
    7.17  Unrestricted Subsidiary Capital Stock............................   62
    7.18  GTE JV; Specified Non-Wholly Owned Subsidiaries..................   62
    7.19  Designation of Unrestricted Subsidiaries as Subsidiaries.........   63
    7.20  Designation of Subsidiaries as Unrestricted Subsidiaries.........   63

SECTION 8. EVENTS OF DEFAULT ...............................................  63

SECTION 9. THE AGENTS ....................................................... 66
    9.1   Appointment ....................................................... 66
    9.2   Delegation of Duties .............................................. 66
    9.3   Exculpatory Provisions ............................................ 66
    9.4   Reliance by Administrative Agent .................................. 66
    9.5   Notice of Default ................................................. 67
    9.6   Non-Reliance on Agents and Other Lenders .......................... 67
    9.7   Indemnification ................................................... 67
    9.8   Agent in Its Individual Capacity................................... 68
    9.9   Successor Administrative Agent .................................... 68
    9.10  Documentation Agent and Syndication Agent ......................... 68

SECTION 10. MISCELLANEOUS ................................................... 68
    10.1  Amendments and Waivers ............................................ 68
    10.2  Notices ........................................................... 70
    10.3  No Waiver; Cumulative Remedies .................................... 70
    10.4  Survival of Representations and Warranties......................... 70
    10.5  Payment of Expenses and Taxes ..................................... 70
    10.6  Successors and Assigns; Participations and Assignments............. 71
    10.7  Adjustments; Set-off .............................................. 74
    10.8  Counterparts ...................................................... 74
    10.9  Severability ...................................................... 74
    10.10 Integration ....................................................... 74
    10.11 GOVERNING LAW ..................................................... 75
    10.12 Submission To Jurisdiction; Waivers ............................... 75
    10.13 Acknowledgements .................................................. 75
    10.14 Releases of Guarantees and Liens .................................. 75
    10.15 Confidentiality ................................................... 76
    10.16 WAIVERS OF JURY TRIAL ............................................. 76


                                     -iii-
<PAGE>

ANNEX:
- -----

A            Pricing Grid


SCHEDULES:
- ---------

1.1          Commitments
4.4          Consents, Authorizations, Filings and Notices
4.15         Subsidiaries
4.19         UCC Filing Jurisdictions
7.2(d)       Existing Indebtedness
7.3(f)       Existing Liens


EXHIBITS:
- --------

A            Form of Guarantee and Collateral Agreement
B            Form of Compliance Certificate
C            Form of Closing Certificate
D-1          Form of New Lender Supplement
D-2          Form of Increased Facility Activation Notice
E            Form of Assignment and Acceptance
F            Form of Legal Opinion of Cravath, Swaine & Moore
G            Form of Prepayment Option Notice
H            Form of Exemption Certificate
I            Form of Permitted Borrower Subordinated Note.


                                     -iv-
<PAGE>

       CREDIT AGREEMENT, dated as of March 15, 2000, among CROWN CASTLE

INTERNATIONAL CORP., a Delaware corporation ("Holdings"), CROWN CASTLE OPERATING
COMPANY, a Delaware corporation (the "Borrower"), the several banks and other
financial institutions or entities from time to time parties to this Agreement
(the "Lenders"), THE BANK OF NOVA SCOTIA, as documentation agent (in such
capacity, the "Documentation Agent"), CREDIT SUISSE FIRST BOSTON and KEY
CORPORATE CAPITAL INC., as syndication agents (in such capacity, the
"Syndication Agents"), and THE CHASE MANHATTAN BANK, as administrative agent (in
such capacity, the "Administrative Agent").

          The parties hereto hereby agree as follows:

                            SECTION 1. DEFINITIONS

          1.1 Defined Terms. As used in this Agreement, the terms listed in this
Section 1.1 shall have the respective meanings set forth in this Section 1.1.

          "ABR": for any day, a rate per annum (rounded upwards, if necessary,
to the next 1/16 of 1%) equal to the greatest of (a) the Prime Rate in effect on
such day, (b) the Base CD Rate in effect on such day plus 1% and (c) the Federal
Funds Effective Rate in effect on such day plus 1/2 of 1%. For purposes hereof:
"Prime Rate" shall mean the rate of interest per annum publicly announced from
time to time by Chase as its prime rate in effect at its principal office in
New York City (the Prime Rate not being intended to be the lowest rate of
interest charged by Chase in connection with extensions of credit to debtors);
"Base CD Rate" shall mean the sum of (a) the product of (i) the Three-Month
Secondary CD Rate and (ii) a fraction, the numerator of which is one and the
denominator of which is one minus the C/D Reserve Percentage and (b) the C/D
Assessment Rate; and "Three-Month Secondary CD Rate" shall mean, for any day,
the secondary market rate for three-month certificates of deposit reported as
being in effect on such day (or, if such day shall not be a Business Day, the
next preceding Business Day) by the Board through the public information
telephone line of the Federal Reserve Bank of New York (which rate will, under
the current practices of the Board, be published in Federal Reserve Statistical
Release H.15(519) during the week following such day), or, if such rate shall
not be so reported on such day or such next preceding Business Day, the average
of the secondary market quotations for three-month certificates of deposit of
major money center banks in New York City received at approximately 10:00 A.M.,
New York City time, on such day (or, if such day shall not be a Business Day, on
the next preceding Business Day) by Chase from three New York City negotiable
certificate of deposit dealers of recognized standing selected by it. Any change
in the ABR due to a change in the Prime Rate, the Three-Month Secondary CD Rate
or the Federal Funds Effective Rate shall be effective as of the opening of
business on the effective day of such change in the Prime Rate, the Three-Month
Secondary CD Rate or the Federal Funds Effective Rate, respectively.

          "ABR Loans": Loans the rate of interest applicable to which is based
upon the ABR.

          "Adjustment Date": as defined in the Pricing Grid.

          "Administrative Agent": as defined in the preamble hereto.

          "Affiliate": as to any Person, any other Person that, directly or
indirectly, is in control of, is controlled by, or is under common control with,
such Person. For purposes of this definition, "control" of a Person means the
power, directly or indirectly, either to (a) vote 10% or more of the securities
having ordinary voting power for the election of directors (or persons
performing similar functions) of
<PAGE>

                                                                               2


such Person or (b) direct or cause the direction of the management and policies
of such Person, whether by contract or otherwise.

          "Agents": the collective reference to the Syndication Agents, the
Documentation Agent and the Administrative Agent.

          "Aggregate Exposure": with respect to any Lender at any time, an
amount equal to the sum of (a) the aggregate then unpaid principal amount of
such Lender's Term Loans, (b) the amount of such Lender's Tranche A Term
Commitment then in effect and (c) the amount of such Lender's Revolving
Commitment then in effect or, if the Revolving Commitments have been terminated,
the amount of such Lender's Revolving Extensions of Credit then outstanding.

          "Aggregate Exposure Percentage": with respect to any Lender at any
time, the ratio (expressed as a percentage) of such Lender's Aggregate Exposure
at such time to the Aggregate Exposure of all Lenders at such time.

          "Agreement": this Credit Agreement, as amended, supplemented or
otherwise modified from time to time.

          "Applicable Margin": (a) with respect to Tranche A Term Loans, Tranche
B Term Loans, Revolving Loans and Swingline Loans, the per annum rates
determined in accordance with the Pricing Grid and (b) with respect to
Incremental Term Loans, such per annum rates as shall be agreed to by the
Borrower and the applicable Incremental Term Lenders as shown in the applicable
Increased Facility Activation Notice.

          "Application": an application, in such form as the relevant Issuing
Lender may specify from time to time, requesting such Issuing Lender to open a
Letter of Credit.

          "Approved Fund": with respect to any Lender that is a fund that
invests in commercial loans, any other fund that invests in commercial loans and
is managed or advised by the same investment advisor as such Lender or by an
Affiliate of such investment advisor.

          "Asset Sale": any Disposition of property or series of related
Dispositions of property (excluding any such Disposition permitted by clause
(a), (b), (c), (d), (f) or (g) of Section 7.5) that yields gross proceeds to the
Borrower or any of its Subsidiaries (valued at the initial principal amount
thereof in the case of non-cash proceeds consisting of notes or other debt
securities and valued at fair market value in the case of other non-cash
proceeds) in excess of $1,000,000.

          "Assignee": as defined in Section 10.6(c).

          "Assignment and Acceptance": an Assignment and Acceptance,
substantially in the form of Exhibit E.

          "Assignor": as defined in Section 10.6(c).

          "Aus$": the lawful currency of Australia.
<PAGE>

                                                                               3

          "Australian Intercompany Loans": loans from the Borrower to the
Australian Subsidiary in an aggregate principal amount not to exceed the Dollar
equivalent of Aus$220,000,000 at any one time outstanding.

          "Australian Subsidiary": CCAL Towers PTY Limited ACN 090 873 019.

          "Available Revolving Commitment": as to any Revolving Lender at any
time, the amount by which (a) such Lender's Revolving Commitment then in effect
exceeds (b) such Lender's Revolving Extensions of Credit then outstanding;
provided, that in calculating any Lender's Revolving Extensions of Credit for
the purpose of determining such Lender's Available Revolving Commitment pursuant
to Section 2.6(a), the aggregate principal amount of Swingline Loans then
outstanding shall be deemed to be zero.

          "Benefitted Lender": as defined in Section 10.7(a).

          "Board": the Board of Governors of the Federal Reserve System of the
United States (or any successor).

          "Borrower": as defined in the preamble hereto.

          "Borrowing Date": any Business Day specified by the Borrower as a date
on which the Borrower requests the relevant Lenders to make Loans hereunder.

          "Business": as defined in Section 4.17(b).

          "Business Day": a day other than a Saturday, Sunday or other day on
which commercial banks in New York City are authorized or required by law to
close, provided, that with respect to notices and determinations in connection
with, and payments of principal and interest on, Eurodollar Loans, such day is
also a day for trading by and between banks in Dollar deposits in the interbank
eurodollar market.

          "Capital Expenditures": for any period, with respect to any Person,
the aggregate of all expenditures by such Person and its Subsidiaries for the
acquisition or leasing (pursuant to a capital lease) of fixed or capital assets
or additions to equipment (including replacements, capitalized repairs and
improvements during such period) that should be capitalized under GAAP on a
consolidated balance sheet of such Person and its Subsidiaries.

          "Capital Lease Obligations": as to any Person, the obligations of such
Person to pay rent or other amounts under any lease of (or other arrangement
conveying the right to use) real or personal property, or a combination thereof,
which obligations are required to be classified and accounted for as capital
leases on a balance sheet of such Person under GAAP and, for the purposes of
this Agreement, the amount of such obligations at any time shall be the
capitalized amount thereof at such time determined in accordance with GAAP.

          "Capital Stock": any and all shares, interests, participations or
other equivalents (however designated) of capital stock of a corporation, any
and all equivalent ownership interests in a Person (other than a corporation)
and any and all warrants, rights or options to purchase any of the foregoing.
<PAGE>

                                                                               4

          "Cash Equivalents": (a) marketable direct obligations issued by, or
unconditionally guaranteed by, the United States Government or issued by any
agency thereof and backed by the full faith and credit of the United States, in
each case maturing within one year from the date of acquisition;
(b) certificates of deposit, time deposits, eurodollar time deposits or
overnight bank deposits having maturities of six months or less from the date of
acquisition issued by any Lender or by any commercial bank organized under the
laws of the United States or any state thereof having combined capital and
surplus of not less than $500,000,000; (c) commercial paper of an issuer rated
at least A-1 by Standard & Poor's Ratings Services ("S&P") or P-1 by Moody's
Investors Service, Inc. ("Moody's"), or carrying an equivalent rating by a
nationally recognized rating agency, if both of the two named rating agencies
cease publishing ratings of commercial paper issuers generally, and maturing
within six months from the date of acquisition; (d) repurchase obligations of
any Lender or of any commercial bank satisfying the requirements of clause (b)
of this definition, having a term of not more than 30 days, with respect to
securities issued or fully guaranteed or insured by the United States
government; (e) securities with maturities of one year or less from the date of
acquisition issued or fully guaranteed by any state, commonwealth or territory
of the United States, or by any political subdivision or taxing authority of any
such state, commonwealth or territory, the securities of which state,
commonwealth, territory, political subdivision or taxing authority (as the case
may be) are rated at least A by S&P or A2 by Moody's; (f) securities with
maturities of six months or less from the date of acquisition backed by standby
letters of credit issued by any Lender or any commercial bank satisfying the
requirements of clause (b) of this definition; (g) shares of money market mutual
or similar funds which invest substantially exclusively in assets satisfying the
requirements of clauses (a) through (f) of this definition or (h) in the case of
any Foreign Subsidiary (i) marketable direct obligations issued by, or
unconditionally guaranteed by, the sovereign nation in which such Foreign
Subsidiary is organized and is conducting business or issued by any agency of
such sovereign nation and backed by the full faith and credit of such sovereign
nation, in each case maturing within one year from the date of acquisition, so
long as the indebtedness of such sovereign nation is rated at least A by S&P or
A2 by Moody's or carries an equivalent rating from a comparable foreign rating
agency or (ii) investments of the type and maturity described in clauses (b)
through (g) above of foreign obligors, which investments or obligors have
ratings described in such clauses or equivalent ratings from comparable foreign
rating agencies.

          "C/D Assessment Rate": for any day as applied to any ABR Loan, the
annual assessment rate in effect on such day that is payable by a member of the
Bank Insurance Fund maintained by the Federal Deposit Insurance Corporation (the
"FDIC") classified as well-capitalized and within supervisory subgroup "B" (or a
comparable successor assessment risk classification) within the meaning of
12 C.F.R. (S) 327.4 (or any successor provision) to the FDIC (or any successor)
for the FDIC's (or such successor's) insuring time deposits at offices of such
institution in the United States.

          "C/D Reserve Percentage": for any day as applied to any ABR Loan, that
percentage (expressed as a decimal) which is in effect on such day, as
prescribed by the Board, for determining the maximum reserve requirement for a
Depositary Institution (as defined in Regulation D of the Board as in effect
from time to time) in respect of new non-personal time deposits in Dollars
having a maturity of 30 days or more.

          "Change of Control": (a) any "person" or "group" (as such terms are
used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as
amended (the "Exchange Act")), excluding the Existing Investors, shall become,
or obtain rights (whether by means or warrants, options or otherwise) to become,
the "beneficial owner" (as defined in Rules 13(d)-3 and 13(d)-5 under the
<PAGE>

                                                                               5

Exchange Act), directly or indirectly, of more than 30% of the outstanding
common stock of Holdings; (b) the Existing Investors, together with their
Affiliates, shall become, or obtain rights (whether by means or warrants,
options or otherwise) to become, the "beneficial owner" (as defined in Rules
13(d)-3 and 13(d)-5 under the Exchange Act), directly or indirectly, of more
than 45% of the outstanding common stock of Holdings; (c) the board of directors
of Holdings shall cease to consist of a majority of Continuing Directors;
(d) Holdings shall cease to own and control, of record and beneficially,
directly, 100% of each class of outstanding Capital Stock of the Borrower free
and clear of all Liens (except Liens created by the Guarantee and Collateral
Agreement); or (e) a Specified Change of Control shall occur.

          "Chase": The Chase Manhattan Bank.

          "Closing Date": the date on which the conditions precedent set forth
in Section 5.1 shall have been satisfied, which date is March 15, 2000.

          "Code": the Internal Revenue Code of 1986, as amended from time to
time.

          "Collateral": all property of the Loan Parties, now owned or hereafter
acquired, upon which a Lien is purported to be created by any Security Document.

          "Commitment": as to any Lender, the sum of the Tranche A Term
Commitment, the Tranche B Term Commitment and the Revolving Commitment of such
Lender.

          "Commonly Controlled Entity": an entity, whether or not incorporated,
that is under common control with the Borrower within the meaning of Section
4001 of ERISA or is part of a group that includes the Borrower and that is
treated as a single employer under Section 414 of the Code.

          "Commitment Fee Rate": a per annum rate based on combined Tranche A
Term Facility drawings and Revolving Facility usage as a percentage of the sum
of (a) the original aggregate amount of the Tranche A Term Commitments (after
giving effect to any optional reductions thereof pursuant to Section 2.7(b))
plus (b) the Total Revolving Commitments as set forth below:

    Combined % of Tranche A Term Facility
    Drawn and Revolving Facility Utilized        Rate

          * 33 1/3%                              1.00%
         ** 33 1/3% but * 66 2/3%                0.75%
         ** 66 2/3%                              0.50%
- -----------
 * Less than
** Greater than or equal to.

          "Compliance Certificate": a certificate duly executed by a Responsible
Officer substantially in the form of Exhibit B.

          "Conduit Lender": any special purpose corporation organized and
administered by any Lender for the purpose of making Loans hereunder otherwise
required to be made by such Lender and designated by such Lender in a written
instrument, subject to the consent of the Administrative Agent and the Borrower
(which, in each case, shall not be unreasonably withheld or delayed); provided,
that the designation by any Lender of a Conduit Lender shall not relieve the
designating Lender of any of its obligations to fund a Loan under this Agreement
if, for any reason, its Conduit Lender fails to fund any
<PAGE>

                                                                               6

such Loan, and the designating Lender (and not the Conduit Lender) shall have
the sole right and responsibility to deliver all consents and waivers required
or requested under this Agreement with respect to its Conduit Lender, and
provided, further, that no Conduit Lender shall (a) be entitled to receive any
greater amount pursuant to Section 2.16, 2.17, 2.18 or 10.5 than the designating
Lender would have been entitled to receive in respect of the extensions of
credit made by such Conduit Lender or (b) be deemed to have any Commitment
hereunder.

          "Confidential Information Memorandum": the Confidential Information
Memorandum dated February 2000 and furnished to certain Lenders.

          "Consolidated Cash Interest Expense": for any period, the total cash
interest expense (including that attributable to Capital Lease Obligations) of
the Borrower and its Subsidiaries for such period with respect to all
outstanding Indebtedness of the Borrower and its Subsidiaries (including all
commissions, discounts and other fees and charges owed with respect to letters
of credit and bankers' acceptance financing and net costs under Hedge Agreements
in respect of interest rates to the extent such net costs are allocable to such
period in accordance with GAAP).

          "Consolidated Current Assets": at any date, all amounts (other than
cash and Cash Equivalents) that would, in conformity with GAAP, be set forth
opposite the caption "total current assets" (or any like caption) on a
consolidated balance sheet of the Borrower and its Subsidiaries at such date.

          "Consolidated Current Liabilities": at any date, all amounts that
would, in conformity with GAAP, be set forth opposite the caption "total current
liabilities" (or any like caption) on a consolidated balance sheet of the
Borrower and its Subsidiaries at such date, but excluding (a) the current
portion of any Funded Debt of the Borrower and its Subsidiaries and (b) without
duplication of clause (a) above, all Indebtedness consisting of Revolving Loans
or Swingline Loans to the extent otherwise included therein.

          "Consolidated Debt Service Coverage Ratio": as of the last day of any
period, the ratio of (a) Consolidated EBITDA for the relevant period ending on
such day to (b) Consolidated Pro Forma Debt Service determined as of such day;
provided that for the purposes this definition, Consolidated EBITDA shall be
deemed to be equal to (i) with respect to the tower rental business of the
Borrower, Consolidated EBITDA for the most recently completed fiscal quarter of
the Borrower multiplied by four and (ii) with respect to all other businesses of
the Borrower, Consolidated EBITDA for the most recently completed four fiscal
quarters of the Borrower.

          "Consolidated EBITDA": for any period, Consolidated Net Income for
such period plus, without duplication and to the extent reflected as a charge in
the statement of such Consolidated Net Income for such period, the sum of
(a) income tax expense, (b) interest expense, amortization or writeoff of debt
discount and debt issuance costs and commissions, discounts and other fees and
charges associated with Indebtedness (including the Loans), (c) depreciation and
amortization expense, (d) amortization of intangibles (including, but not
limited to, goodwill) and organization costs, (e) any extraordinary, unusual or
non-recurring non-cash expenses or losses (including, whether or not otherwise
includable as a separate item in the statement of such Consolidated Net Income
for such period, non-cash losses on sales of assets outside of the ordinary
course of business), and (f) any other non-cash charges, and minus, to the
extent included in the statement of such Consolidated Net Income for such
period, the sum of (a) interest income, (b) any extraordinary, unusual or non-
recurring income or gains (including, whether or not otherwise includable as a
separate item in the statement of such Consolidated Net Income
<PAGE>

                                                                               7

for such period, gains on the sales of assets outside of the ordinary course of
business) and (c) any other non-cash income, all as determined on a consolidated
basis. Notwithstanding anything to the contrary in this Agreement, in
determining Consolidated EBITDA, (x) the amount of Consolidated EBITDA
attributable to any Subsidiary (other than a Wholly Owned Subsidiary) shall be
included in such determination only to the extent of the Borrower's percentage
ownership interest in such Subsidiary (except as provided in clause (y) below)
and in any event shall not, in the case of any Specified Non-Wholly Owned
Subsidiary, exceed the then outstanding principal amount of the Specified
Intercompany Note issued by such Subsidiary divided by the then applicable
Consolidated Leverage Ratio required by Section 7.1(a) and (y) the amount of
Consolidated EBITDA attributable to the GTE JV shall be included in such
determination only to the extent of the Borrower's percentage ownership interest
in the GTE JV (determined on a pro forma basis after giving effect to the
anticipated distribution (the "GTE Distribution") from time to time of up to
5,360,493 shares of the Capital Stock of Holdings to GTE Wireless at a price of
$18.655 per share). The Australian Subsidiary shall be treated as a Wholly Owned
Subsidiary of the Borrower for the purposes of this definition if and so long as
it is a party to security documents satisfactory to the Administrative Agent and
100% of its Capital Stock has been pledged as Collateral. Notwithstanding
anything to the contrary herein, Consolidated EBITDA attributable to any
Subsidiary of any Specified Non-Wholly Owned Subsidiary (other than any such
Subsidiary that itself is a Specified Non-Wholly Owned Subsidiary) or of the
Australian Subsidiary shall be disregarded except to the extent actually
distributed to such Specified Non-Wholly Owned Subsidiary or the Australian
Subsidiary, as the case may be.

          "Consolidated Fixed Charge Coverage Ratio": as of the last day of any
period, the ratio of (a) Consolidated EBITDA for the period of four consecutive
fiscal quarters ending on such day to (b) Consolidated Fixed Charges for the
period of four consecutive fiscal quarters ending on such day.

          "Consolidated Fixed Charges": for any period, the sum (without
duplication) of (a) Consolidated Cash Interest Expense for such period, (b) all
distributions made by the Borrower or any of its Subsidiaries during such period
in order to enable Holdings to pay (i) cash interest or dividends in respect of
Indebtedness or preferred stock of Holdings or (ii) overhead expenses of
Holdings, (c) scheduled payments made during such period on account of principal
of Indebtedness of the Borrower or any of its Subsidiaries (including scheduled
principal payments in respect of the Term Loans and payments of Revolving Loans
accompanying scheduled reductions of the Revolving Commitments) and (d) income
tax expense for such period.

          "Consolidated Interest Coverage Ratio": as of the last day of any
period, the ratio of (a) Consolidated EBITDA for the period of four consecutive
fiscal quarters ending on such day to (b) Consolidated Cash Interest Expense for
the period of four consecutive fiscal quarters ending on such day.

          "Consolidated Leverage Ratio": as of the last day of any period, the
ratio of (a) Consolidated Total Debt on such day to (b) Consolidated EBITDA for
such period; provided that for the purposes this definition, Consolidated EBITDA
shall be deemed to be equal to (i) with respect to the tower rental business of
the Borrower, Consolidated EBITDA for the most recently completed fiscal quarter
of the Borrower multiplied by four and (ii) with respect to all other businesses
of the Borrower, Consolidated EBITDA for the most recently completed four fiscal
quarters of the Borrower.

          "Consolidated Net Income": for any period, the consolidated net income
(or loss) of the Borrower and its Subsidiaries (adjusted to exclude non-cash
minority interests), determined on a
<PAGE>

                                                                               8

consolidated basis in accordance with GAAP; provided that there shall be
excluded (a) the income (or deficit) of any Person accrued prior to the date it
becomes a Subsidiary of the Borrower or is merged into or consolidated with the
Borrower or any of its Subsidiaries, (b) the income (or deficit) of any Person
(other than a Subsidiary of the Borrower) in which the Borrower or any of its
Subsidiaries has an ownership interest, except to the extent that any such
income is actually received by the Borrower or such Subsidiary in the form of
dividends or similar distributions and (c) the undistributed earnings of any
Subsidiary of the Borrower to the extent that the declaration or payment of
dividends or similar distributions by such Subsidiary is not at the time
permitted by the terms of any Contractual Obligation or Requirement of Law
applicable to such Subsidiary.

          "Consolidated Pro Forma Debt Service": as of the last day of any
period, the sum of (a) Consolidated Cash Interest Expense for the period of four
consecutive fiscal quarters ending on such day, (b) all distributions made by
the Borrower or any of its Subsidiaries for the period of four consecutive
fiscal quarters ending on such day in order to enable Holdings to pay (i) cash
interest or dividends in respect of Indebtedness or preferred stock of Holdings
or (ii) overhead expenses of Holdings and (c) scheduled principal payments on
Indebtedness of the Borrower or any of its Subsidiaries for the period of four
consecutive fiscal quarters commencing immediately after such day (or, in the
case of the Revolving Facility, the excess, if any, of the Total Revolving
Extensions of Credit outstanding on such day over the amount of the Total
Revolving Commitments scheduled to be in effect at the end of such period of
four consecutive fiscal quarters).

          "Consolidated Total Debt": at any date, the aggregate principal amount
of all Indebtedness of the Borrower and its Subsidiaries at such date,
determined on a consolidated basis in accordance with GAAP.

          "Consolidated Working Capital": at any date, the excess of
Consolidated Current Assets on such date over Consolidated Current Liabilities
on such date.

          "Continuing Directors": the directors of Holdings on the Closing Date
and each other director, if, in each case, such other director's nomination for
election to the board of directors of Holdings is recommended by at least 66-
2/3% of the then Continuing Directors.

          "Contractual Obligation": as to any Person, any provision of any
security issued by such Person or of any agreement, instrument or other
undertaking to which such Person is a party or by which it or any of its
property is bound.

          "Default": any of the events specified in Section 8, whether or not
any requirement for the giving of notice, the lapse of time, or both, has been
satisfied.

          "Defaulting Lender": any Lender that defaults in its obligation to
make any Loan hereunder.

          "Disposition": with respect to any property, any sale, lease, sale and
leaseback, assignment, conveyance, transfer or other disposition thereof. The
terms "Dispose" and "Disposed of" shall have correlative meanings.

          "Documentation Agent": as defined in the preamble hereto.
<PAGE>

                                                                               9

          "Dollars" and "$": dollars in lawful currency of the United States.

          "Domestic Subsidiary": any Subsidiary of the Borrower organized under
the laws of any jurisdiction within the United States.

          "Environmental Laws": any and all Requirements of Law regulating,
relating to or imposing liability or standards of conduct concerning protection
of human health or the environment.

          "ERISA": the Employee Retirement Income Security Act of 1974, as
amended from time to time.

          "Eurocurrency Reserve Requirements": for any day as applied to a
Eurodollar Loan, the aggregate (without duplication) of the maximum rates
(expressed as a decimal fraction) of reserve requirements in effect on such day
(including basic, supplemental, marginal and emergency reserves under any
regulations of the Board or other Governmental Authority having jurisdiction
with respect thereto) dealing with reserve requirements prescribed for
eurocurrency funding (currently referred to as "Eurocurrency Liabilities" in
Regulation D of the Board) maintained by a member bank of the Federal Reserve
System.

          "Eurodollar Base Rate": with respect to each day during each Interest
Period pertaining to a Eurodollar Loan, the rate per annum determined on the
basis of the rate for deposits in Dollars for a period equal to such Interest
Period commencing on the first day of such Interest Period appearing on Page
3750 of the Dow Jones Markets screen as of 11:00 A.M., London time, two Business
Days prior to the beginning of such Interest Period. In the event that such rate
does not appear on Page 3750 of the Dow Jones Markets screen (or otherwise on
such screen), the "Eurodollar Base Rate" shall be determined by reference to
such other comparable publicly available service for displaying eurodollar rates
as may be selected by the Administrative Agent or, in the absence of such
availability, by reference to the rate at which the Administrative Agent is
offered Dollar deposits at or about 11:00 A.M., New York City time, two Business
Days prior to the beginning of such Interest Period in the interbank eurodollar
market where its eurodollar and foreign currency and exchange operations are
then being conducted for delivery on the first day of such Interest Period for
the number of days comprised therein.

          "Eurodollar Loans": Loans the rate of interest applicable to which is
based upon the Eurodollar Rate.

          "Eurodollar Rate": with respect to each day during each Interest
Period pertaining to a Eurodollar Loan, a rate per annum determined for such day
in accordance with the following formula (rounded upward to the nearest 1/100th
of 1%):

                             Eurodollar Base Rate
                       ---------------------------------
                   1.00 - Eurocurrency Reserve Requirements

          "Eurodollar Tranche": the collective reference to Eurodollar Loans
under a particular Facility the then current Interest Periods with respect to
all of which begin on the same date and end on the same later date (whether or
not such Loans shall originally have been made on the same day).
<PAGE>

                                                                              10

          "Event of Default": any of the events specified in Section 8, provided
that any requirement for the giving of notice, the lapse of time, or both, has
been satisfied.

          "Excess Cash Flow": for any fiscal year of the Borrower, the excess,
if any, of (a) the sum, without duplication, of (i) Consolidated Net Income for
such fiscal year, (ii) an amount equal to the amount of all non-cash charges
(including depreciation and amortization) deducted in arriving at such
Consolidated Net Income, (iii) decreases in Consolidated Working Capital for
such fiscal year, and (iv) an amount equal to the aggregate net non-cash loss on
the Disposition of property by the Borrower and its Subsidiaries during such
fiscal year (other than sales of inventory in the ordinary course of business),
to the extent deducted in arriving at such Consolidated Net Income over (b) the
sum, without duplication, of (i) an amount equal to the amount of all non-cash
credits included in arriving at such Consolidated Net Income, (ii) the aggregate
amount actually paid by the Borrower and its Subsidiaries in cash during such
fiscal year on account of Capital Expenditures (excluding the principal amount
of Indebtedness incurred in connection with such expenditures and any such
expenditures financed with the proceeds of any Reinvestment Deferred Amount),
(iii) the aggregate amount of all prepayments of Revolving Loans and Swingline
Loans during such fiscal year to the extent accompanying permanent optional
reductions of the Revolving Commitments and all optional prepayments of the Term
Loans during such fiscal year, (iv) the aggregate amount of all regularly
scheduled principal payments of Funded Debt (including the Term Loans) of the
Borrower and its Subsidiaries made during such fiscal year (other than in
respect of any revolving credit facility to the extent there is not an
equivalent permanent reduction in commitments thereunder), (v) increases in
Consolidated Working Capital for such fiscal year, and (vi) an amount equal to
the aggregate net non-cash gain on the Disposition of property by the Borrower
and its Subsidiaries during such fiscal year (other than sales of inventory in
the ordinary course of business), to the extent included in arriving at such
Consolidated Net Income.

          "Excess Cash Flow Application Date": as defined in Section 2.9(c).

          "Existing Investors": TeleDiffussion de France International S.A.,
Transmission Future Networks B.V., Candover Investments, PLC, Candover
(Trustees) Limited, Candover Partners Limited, Ted B. Miller, Jr., Robert A.
Crown, Barbara A. Crown, RC Investors Corp., BC Investors Corp., RACG Holdings
LLC, BACG Holdings LLC, Berkshire Fund III Limited Partnership, Berkshire Fund
IV Limited Partnership, Berkshire Investors PLC, Centennial Fund IV, LP,
Centennial Fund V, LP, Centennial Entrepreneurs Fund V, LP, Nassau Capital
Partners II, LP, NAS Partners I, LLC, Fay, Richwhite Communications Limited, PNC
Venture Corp., American Home Assurance Company, New York Life Assurance Company,
The Northwestern Mutual Life Insurance Company, Prime VIII, LP, Bell Atlantic
Corporation, Bell South Corporation, General Electric Capital Corporation and
SFG-P, Inc.

          "Facility": each of (a) the Tranche A Term Commitments and the Tranche
A Term Loans made thereunder (the "Tranche A Term Facility"), (b) the Tranche B
Term Commitments and the Tranche B Term Loans made thereunder (the "Tranche B
Term Facility"), (c) the Incremental Term Loans (the "Incremental Term
Facility") and (d) the Revolving Commitments and the extensions of credit made
thereunder (the "Revolving Facility").

          "Federal Funds Effective Rate": for any day, the weighted average of
the rates on overnight federal funds transactions with members of the Federal
Reserve System arranged by federal funds brokers, as published on the next
succeeding Business Day by the Federal Reserve Bank of New York, or, if such
rate is not so published for any day that is a Business Day, the average of the
<PAGE>

                                                                              11

quotations for the day of such transactions received by Chase from three federal
funds brokers of recognized standing selected by it.

          "Foreign Subsidiary": any Subsidiary of the Borrower that is not a
Domestic Subsidiary.

          "Funded Debt": as to any Person, all Indebtedness of such Person that
matures more than one year from the date of its creation or matures within one
year from such date but is renewable or extendible, at the option of such
Person, to a date more than one year from such date or arises under a revolving
credit or similar agreement that obligates the lender or lenders to extend
credit during a period of more than one year from such date, including all
current maturities and current sinking fund payments in respect of such
Indebtedness whether or not required to be paid within one year from the date of
its creation and, in the case of the Borrower, Indebtedness in respect of the
Loans.

          "Funding Office": the office of the Administrative Agent specified in
Section 10.2 or such other office as may be specified from time to time by the
Administrative Agent as its funding office by written notice to the Borrower and
the Lenders.

          "GAAP": generally accepted accounting principles in the United States
as in effect from time to time, except that for purposes of Section 7.1, GAAP
shall be determined on the basis of such principles in effect on the date hereof
and consistent with those used in the preparation of the most recent audited
financial statements referred to in Section 4.1(b). In the event that any
"Accounting Change" (as defined below) shall occur and such change results in a
change in the method of calculation of financial covenants, standards or terms
in this Agreement, then the Borrower and the Administrative Agent agree to enter
into negotiations in order to amend such provisions of this Agreement so as to
equitably reflect such Accounting Changes with the desired result that the
criteria for evaluating the Borrower's financial condition shall be the same
after such Accounting Changes as if such Accounting Changes had not been made.
Until such time as such an amendment shall have been executed and delivered by
the Borrower, the Administrative Agent and the Required Lenders, all financial
covenants, standards and terms in this Agreement shall continue to be calculated
or construed as if such Accounting Changes had not occurred. "Accounting
Changes" refers to changes in accounting principles required by the promulgation
of any rule, regulation, pronouncement or opinion by the Financial Accounting
Standards Board of the American Institute of Certified Public Accountants or, if
applicable, the SEC.

          "Governing Documents": collectively, as to any Person, the articles or
certificate of incorporation and bylaws, any shareholders agreement, certificate
of formation, limited liability company agreement, partnership agreement or
other formation or constituent documents of such Person.

          "Governmental Authority": any nation or government, any state or other
political subdivision thereof, any agency, authority, instrumentality,
regulatory body, court, central bank or other entity exercising executive,
legislative, judicial, taxing, regulatory or administrative functions of or
pertaining to government, any securities exchange and any self-regulatory
organization (including the National Association of Insurance Commissioners).

          "GTE Distribution": as defined in the definition of "Consolidated
EBITDA".

          "GTE JV": Crown Castle GT Holding Company LLC, a Delaware limited
liability company.
<PAGE>

                                                                              12

          "GTE Wireless": GTE Wireless Incorporated, a Delaware corporation.

          "Guarantee and Collateral Agreement": the Guarantee and Collateral
Agreement to be executed and delivered by Holdings, the Borrower, each
Subsidiary Guarantor and each Specified Non-Wholly Owned Subsidiary,
substantially in the form of Exhibit A, as the same may be amended, supplemented
or otherwise modified from time to time. If requested by the Administrative
Agent, any Foreign Subsidiary that would otherwise be required to become a party
to the Guarantee and Collateral Agreement shall instead become a party to
separate agreements having a substantially equivalent effect.

          "Guarantee Obligation": as to any Person (the "guaranteeing person"),
any obligation of (a) the guaranteeing person or (b) another Person (including
any bank under any letter of credit) to induce the creation of which the
guaranteeing person has issued a reimbursement, counterindemnity or similar
obligation, in either case guaranteeing or in effect guaranteeing any
Indebtedness, leases, dividends or other obligations (the "primary obligations")
of any third Person (the "primary obligor") in any manner, whether directly or
indirectly, including any obligation of the guaranteeing person, whether or not
contingent, (i) to purchase any such primary obligation or any property
constituting direct or indirect security therefor, (ii) to advance or supply
funds (1) for the purchase or payment of any such primary obligation or (2) to
maintain working capital or equity capital of the primary obligor or otherwise
to maintain the net worth or solvency of the primary obligor, (iii) to purchase
property, securities or services primarily for the purpose of assuring the owner
of any such primary obligation of the ability of the primary obligor to make
payment of such primary obligation or (iv) otherwise to assure or hold harmless
the owner of any such primary obligation against loss in respect thereof;
provided, however, that the term Guarantee Obligation shall not include
endorsements of instruments for deposit or collection in the ordinary course of
business. The amount of any Guarantee Obligation of any guaranteeing person
shall be deemed to be the lower of (a) an amount equal to the stated or
determinable amount of the primary obligation in respect of which such Guarantee
Obligation is made and (b) the maximum amount for which such guaranteeing person
may be liable pursuant to the terms of the instrument embodying such Guarantee
Obligation, unless such primary obligation and the maximum amount for which such
guaranteeing person may be liable are not stated or determinable, in which case
the amount of such Guarantee Obligation shall be such guaranteeing person's
maximum reasonably anticipated liability in respect thereof as determined by the
Borrower in good faith.

          "Guarantors": the collective reference to Holdings and the Subsidiary
Guarantors.

          "Hedge Agreements": all interest rate swaps, caps or collar agreements
or similar arrangements dealing with interest rates or currency exchange rates
or the exchange of nominal interest obligations, either generally or under
specific contingencies.

          "Holdings": as defined in the preamble hereto.

          "Holdings Debt Agreements": the collective reference to the agreements
in existence on the Closing Date governing the 10-5/8% Senior Discount Notes,
the 12-3/4% Senior Exchangeable Preferred Stock, the 12-3/4% Senior Subordinated
Exchange Debentures, the 10-3/8% Senior Discount Notes, the 9% Senior Notes, the
11-1/4% Senior Discount Notes and the 9-1/2% Senior Notes of Holdings.
<PAGE>

                                                                              13

          "Holdings Qualified Obligations": (a) Indebtedness or preferred stock
of Holdings outstanding on the Closing Date, (b) Indebtedness or preferred stock
of Holdings incurred or issued after the Closing Date, the net proceeds of which
are contributed to the Borrower and are not used to make Investments in Persons
that are not Subsidiaries of the Borrower and (c) any refinancing of any of the
foregoing.

          "Increased Facility Activation Date": any Business Day on which any
Lender shall execute and deliver to the Administrative Agent an Increased
Facility Activation Notice pursuant to Section 2.1(c).

          "Increased Facility Activation Notice": a notice substantially in the
form of Exhibit D-2.

          "Increased Facility Closing Date": any Business Day designated as such
in an Increased Facility Activation Notice.

          "Incremental Term Facility": as defined in the definition of
"Facility".

          "Incremental Term Lenders": (a) on any Increased Facility Activation
Date relating to Incremental Term Loans, the Lenders signatory to the relevant
Increased Facility Activation Notice and (b) thereafter, each Lender that is a
holder of an Incremental Term Loan.

          "Incremental Term Loans": as defined in Section 2.1(a).

          "Incremental Term Maturity Date": with respect to the Incremental Term
Loans to be made pursuant to any Increased Facility Activation Notice, the
maturity date specified in such Increased Facility Activation Notice, which date
shall be a date at least six months after the final maturity of the Tranche B
Term Loans.

          "Indebtedness": of any Person at any date, without duplication, (a)
all indebtedness of such Person for borrowed money, (b) all obligations of such
Person for the deferred purchase price (to the extent determinable) of property
or services (other than current trade payables incurred in the ordinary course
of such Person's business), provided that to the extent any such obligation is
reflected as a liability on the balance sheet of such Person, such obligation
shall in any event be considered "Indebtedness", (c) all obligations of such
Person evidenced by notes, bonds, debentures or other similar instruments, (d)
all indebtedness created or arising under any conditional sale or other title
retention agreement with respect to property acquired by such Person (even
though the rights and remedies of the seller or lender under such agreement in
the event of default are limited to repossession or sale of such property), (e)
all Capital Lease Obligations of such Person, (f) all obligations of such
Person, contingent or otherwise, as an account party or applicant under or in
respect of acceptances, letters of credit, surety bonds or similar arrangements,
(g) the liquidation value of all redeemable preferred Capital Stock of such
Person, (h) all Guarantee Obligations of such Person in respect of obligations
of the kind referred to in clauses (a) through (g) above, (i) all obligations of
the kind referred to in clauses (a) through (h) above secured by (or for which
the holder of such obligation has an existing right, contingent or otherwise, to
be secured by) any Lien on property (including accounts and contract rights)
owned by such Person, whether or not such Person has assumed or become liable
for the payment of such obligation and (j) for the purposes of Sections 7.2 and
8(e) only, all obligations of such Person in respect of Hedge Agreements. The
Indebtedness of any Person shall include the Indebtedness of any other entity
<PAGE>

                                                                              14


(including any partnership in which such Person is a general partner) to the
extent such Person is liable therefor as a result of such Person's ownership
interest in or other relationship with such entity, except to the extent the
terms of such Indebtedness expressly provide that such Person is not liable
therefor.

          "Insolvency": with respect to any Multiemployer Plan, the condition
that such Plan is insolvent within the meaning of Section 4245 of ERISA.

          "Insolvent": pertaining to a condition of Insolvency.

          "Intellectual Property": the collective reference to all rights,
priorities and privileges relating to intellectual property, whether arising
under United States, multinational or foreign laws or otherwise, including
copyrights, copyright licenses, patents, patent licenses, trademarks, trademark
licenses, technology, know-how and processes, and all rights to sue at law or in
equity for any infringement or other impairment thereof, including the right to
receive all proceeds and damages therefrom.

          "Interest Payment Date": (a) as to any ABR Loan, the last day of each
March, June, September and December to occur while such Loan is outstanding and
the final maturity date of such Loan, (b) as to any Eurodollar Loan having an
Interest Period of three months or less, the last day of such Interest Period,
(c) as to any Eurodollar Loan having an Interest Period longer than three
months, each day that is three months, or a whole multiple thereof, after the
first day of such Interest Period and the last day of such Interest Period and
(d) as to any Loan (other than any Revolving Loan that is an ABR Loan and any
Swingline Loan), the date of any repayment or prepayment made in respect
thereof.

          "Interest Period": as to any Eurodollar Loan, (a) initially, the
period commencing on the borrowing or conversion date, as the case may be, with
respect to such Eurodollar Loan and ending one, two, three or six (or, with the
consent of all Lenders under the relevant Facility, nine or twelve) months
thereafter, as selected by the Borrower in its notice of borrowing or notice of
conversion, as the case may be, given with respect thereto; and (b) thereafter,
each period commencing on the last day of the next preceding Interest Period
applicable to such Eurodollar Loan and ending one, two, three or six (or, with
the consent of all Lenders under the relevant Facility, nine or twelve) months
thereafter, as selected by the Borrower by irrevocable notice to the
Administrative Agent not less than three Business Days prior to the last day of
the then current Interest Period with respect thereto; provided that, all of the
foregoing provisions relating to Interest Periods are subject to the following:

          (i)   if any Interest Period would otherwise end on a day that is not
      a Business Day, such Interest Period shall be extended to the next
      succeeding Business Day unless the result of such extension would be to
      carry such Interest Period into another calendar month in which event such
      Interest Period shall end on the immediately preceding Business Day;

          (ii)  the Borrower may not select an Interest Period under a
      particular Facility that would extend beyond the Revolving Termination
      Date or beyond the date final payment is due on the Tranche A Term Loans,
      the Tranche B Term Loans or the relevant Incremental Term Loans, as the
      case may be;
<PAGE>

                                                                              15

          (iii) any Interest Period that begins on the last Business Day of a
      calendar month (or on a day for which there is no numerically
      corresponding day in the calendar month at the end of such Interest
      Period) shall end on the last Business Day of a calendar month; and

          (iv)  the Borrower shall select Interest Periods so as not to require
      a payment or prepayment of any Eurodollar Loan during an Interest Period
      for such Loan.

          "Investments": as defined in Section 7.7.

          "Issuing Lender": each of Chase, KCCI and any other Revolving Lender
that has agreed in its sole discretion to act as an "Issuing Lender" hereunder
and that has been approved in writing by the Administrative Agent as an "Issuing
Lender" hereunder, in each case in its capacity as issuer of any Letter of
Credit.

          "KCCI": Key Corporate Capital Inc.

          "KCCI Credit Agreement": the Amended and Restated Loan Agreement,
dated as of July 10, 1998, by and among Crown Communication Inc., Crown Castle
International Corp. de Puerto Rico, KCCI, PNC Bank, National Association and the
other financial institutions party thereto.

          "L/C Commitment": $25,000,000.

          "L/C Fee Payment Date": the last day of each March, June, September
and December and the last day of the Revolving Commitment Period.

          "L/C Obligations": at any time, an amount equal to the sum of (a) the
aggregate then undrawn and unexpired amount of the then outstanding Letters of
Credit and (b) the aggregate amount of drawings under Letters of Credit that
have not then been reimbursed pursuant to Section 3.5.

          "L/C Participants": with respect to any Letter of Credit, the
collective reference to all the Revolving Lenders other than the Issuing Lender
that issued such Letter of Credit.

          "Lenders": as defined in the preamble hereto; provided, that unless
the context otherwise requires, each reference herein to the Lenders shall be
deemed to include any Conduit Lender.

          "Letters of Credit": as defined in Section 3.1(a).

          "Lien": any mortgage, pledge, hypothecation, assignment, deposit
arrangement, encumbrance, lien (statutory or other), charge or other security
interest or any preference, priority or other security agreement or preferential
arrangement of any kind or nature whatsoever (including any conditional sale or
other title retention agreement and any capital lease having substantially the
same economic effect as any of the foregoing).

          "Loan": any loan made by any Lender pursuant to this Agreement.

          "Loan Documents": this Agreement, the Security Documents, Specified
Intercompany Notes and any note evidencing Australian Intercompany Loans.
<PAGE>

                                                                              16

          "Loan Parties": Holdings, the Borrower and each Subsidiary of the
Borrower that is a party to a Loan Document.

          "Majority Facility Lenders": with respect to any Facility, the holders
of more than 50% of the aggregate unpaid principal amount of the Tranche A Term
Loans, the Tranche B Term Loans, the Incremental Term Loans or the Total
Revolving Extensions of Credit, as the case may be, outstanding under such
Facility (or, in the case of the Revolving Facility, prior to any termination of
the Revolving Commitments, the holders of more than 50% of the Total Revolving
Commitments).

          "Material Action": with respect to any Unrestricted Subsidiary,
Unrestricted Subsidiary SPV or Tower SPV, (i) to consolidate or merge such
Person with or into any other Person, or sell all or substantially all of the
assets of such Person, or to institute proceedings to have such Person be
adjudicated bankrupt or insolvent, or consent to the institution of bankruptcy
or insolvency proceedings against such Person or file a petition seeking, or
consent to, reorganization or relief with respect to such Person under any
applicable federal or state law relating to bankruptcy, or consent to the
appointment of a receiver, liquidator, assignee, trustee, sequestrator (or other
similar official) of such Person or a substantial part of its property, or make
any assignment for the benefit of creditors of such Person, or admit in writing
such Person's inability to pay its debts generally as they become due, or, to
the fullest extent permitted by law, take action in furtherance of any such
action, or dissolve or liquidate such Person, or (ii) to take any other action
that would cause or permit the dissolution of such Person whether pursuant to
the Governing Documents of such Person, judicial dissolution, applicable law or
otherwise.

          "Material Adverse Effect": a material adverse effect on (a) the
business, property, operations or condition (financial or otherwise) of the
Borrower and its Subsidiaries taken as a whole or (b) the validity or
enforceability of this Agreement or any of the other Loan Documents or the
rights or remedies of the Administrative Agent or the Lenders hereunder or
thereunder.

          "Materials of Environmental Concern": any gasoline or petroleum
(including crude oil or any fraction thereof) or petroleum products or any
hazardous or toxic substances, materials or wastes, defined or regulated as such
in or under any Environmental Law, including asbestos, polychlorinated biphenyls
and urea-formaldehyde insulation.

          "Multiemployer Plan": a Plan that is a multiemployer plan as defined
in Section 4001(a)(3) of ERISA.

          "Net Cash Proceeds": (a) in connection with any Asset Sale or any
Recovery Event, the proceeds thereof in the form of cash and Cash Equivalents
(including any such proceeds received by way of deferred payment of principal
pursuant to a note or installment receivable or purchase price adjustment
receivable or otherwise, but only as and when received) of such Asset Sale or
Recovery Event, net of attorneys' fees, accountants' fees, investment banking
fees, amounts required to be applied to the repayment of Indebtedness secured by
a Lien expressly permitted hereunder on any asset that is the subject of such
Asset Sale or Recovery Event (other than any Lien pursuant to a Security
Document) and other customary fees and expenses actually incurred in connection
therewith and net of taxes paid or reasonably estimated to be payable as a
result thereof (after taking into account any available tax credits or
deductions and any tax sharing arrangements) and (b) in connection with any
issuance or sale of Capital Stock or any incurrence of Indebtedness, the cash
proceeds received from such issuance or
<PAGE>

                                                                              17

incurrence, net of attorneys' fees, investment banking fees, accountants' fees,
underwriting discounts and commissions and other customary fees and expenses
actually incurred in connection therewith.

          "New Lender": as defined in Section 2.1(d).

          "New Lender Supplement": as defined in Section 2.1(d).

          "Non-Excluded Taxes": as defined in Section 2.17(a).

          "Non-U.S. Lender": as defined in Section 2.17(d).

          "Obligations": the unpaid principal of and interest on (including
interest accruing after the maturity of the Loans and Reimbursement Obligations
and interest accruing after the filing of any petition in bankruptcy, or the
commencement of any insolvency, reorganization or like proceeding, relating to
the Borrower, whether or not a claim for post-filing or post-petition interest
is allowed in such proceeding) the Loans and all other obligations and
liabilities of the Borrower to the Administrative Agent or to any Lender (or, in
the case of Hedge Agreements, any affiliate of any Lender), whether direct or
indirect, absolute or contingent, due or to become due, or now existing or
hereafter incurred, which may arise under, out of, or in connection with, this
Agreement, any other Loan Document, the Letters of Credit, any Hedge Agreement
entered into with any Lender or any affiliate of any Lender or any other
document made, delivered or given in connection herewith or therewith, whether
on account of principal, interest, reimbursement obligations, fees, indemnities,
costs, expenses (including all fees, charges and disbursements of counsel to the
Administrative Agent or to any Lender that are required to be paid by the
Borrower pursuant hereto) or otherwise.

          "Other Taxes": any and all present or future stamp or documentary
taxes or any other excise or property taxes, charges or similar levies arising
from any payment made hereunder or from the execution, delivery or enforcement
of, or otherwise with respect to, this Agreement or any other Loan Document.

          "Participant": as defined in Section 10.6(b).

          "PBGC": the Pension Benefit Guaranty Corporation established pursuant
to Subtitle A of Title IV of ERISA (or any successor).

          "Permitted Borrower Subordinated Indebtedness": Indebtedness of the
Borrower to Holdings which is evidenced by a promissory note substantially
identical to Exhibit I.

          "Person": an individual, partnership, corporation, limited liability
company, business trust, joint stock company, trust, unincorporated association,
joint venture, Governmental Authority or other entity of whatever nature.

          "Plan": at a particular time, any employee benefit plan that is
covered by ERISA and in respect of which the Borrower or a Commonly Controlled
Entity is (or, if such plan were terminated at such time, would under Section
4069 of ERISA be deemed to be) an "employer" as defined in Section 3(5) of
ERISA.
<PAGE>

                                                                              18

          "Pricing Grid": the pricing grid attached hereto as Annex A.

          "Pro Forma Balance Sheets": as defined in Section 4.1(a).

          "Projections": as defined in Section 6.2(c).

          "Properties": as defined in Section 4.17(a).

          "Recovery Event": any settlement of or payment in respect of any
property or casualty insurance claim or any condemnation proceeding relating to
any asset of the Borrower or any of its Subsidiaries.

          "Refunded Swingline Loans": as defined in Section 2.5(b).

          "Refunding Date": as defined in Section 2.5(c).

          "Register": as defined in Section 10.6(d).

          "Regulation U": Regulation U of the Board as in effect from time to
time.

          "Reimbursement Obligation": the obligation of the Borrower to
reimburse the relevant Issuing Lender pursuant to Section 3.5 for amounts drawn
under Letters of Credit.

          "Reinvestment Deferred Amount": with respect to any Reinvestment
Event, the aggregate Net Cash Proceeds received by the Borrower or any of its
Subsidiaries in connection therewith that are not applied to prepay the Term
Loans or reduce the Revolving Commitments pursuant to Section 2.9(b) as a result
of the delivery of a Reinvestment Notice.

          "Reinvestment Event": any Asset Sale or Recovery Event in respect of
which the Borrower has delivered a Reinvestment Notice.

          "Reinvestment Notice": a written notice executed by a Responsible
Officer stating that the Borrower (directly or indirectly through a Subsidiary)
intends and expects to use all or a specified portion of the Net Cash Proceeds
of an Asset Sale or Recovery Event to acquire or repair assets useful in its
business.

          "Reinvestment Prepayment Amount": with respect to any Reinvestment
Event, the Reinvestment Deferred Amount relating thereto less any amount
expended prior to the relevant Reinvestment Prepayment Date to acquire or repair
assets useful in the Borrower's business.

          "Reinvestment Prepayment Date": with respect to any Reinvestment
Event, the earlier of (a) the date occurring twelve months after such
Reinvestment Event and (b) the date on which the Borrower shall have determined
not to, or shall have otherwise ceased to, acquire or repair assets useful in
the Borrower's business with all or any portion of the relevant Reinvestment
Deferred Amount.

          "Reorganization": with respect to any Multiemployer Plan, the
condition that such plan is in reorganization within the meaning of Section 4241
of ERISA.
<PAGE>

                                                                              19

          "Reportable Event": any of the events set forth in Section 4043(c) of
ERISA, other than those events as to which the thirty day notice period is
waived under subsections .27, .28, .29, .30, .31, .32, .34 or .35 of PBGC Reg.
(S) 4043.

          "Required Lenders": at any time, the holders of more than 50% of the
sum of (a) the aggregate unpaid principal amount of the Term Loans then
outstanding, (b) the aggregate Tranche A Term Commitments then in effect and (c)
the Total Revolving Commitments then in effect or, if the Revolving Commitments
have been terminated, the Total Revolving Extensions of Credit then outstanding.
The Term Loans outstanding, Tranche A Commitments and Revolving Commitments in
effect (or, when applicable, Revolving Extensions of Credit outstanding) of any
Defaulting Lender shall be excluded for purposes of any vote of the Required
Lenders.

          "Requirement of Law": as to any Person, the Certificate of
Incorporation and By-Laws or other organizational or governing documents of such
Person, and any law, treaty, rule or regulation or determination of an
arbitrator or a court or other Governmental Authority, in each case applicable
to or binding upon such Person or any of its property or to which such Person or
any of its property is subject.

          "Responsible Officer": the chief executive officer, president, chief
financial officer, chief accounting officer or treasurer of the Borrower, but in
any event, with respect to financial matters, the chief financial officer of the
Borrower.

          "Restricted Payments": as defined in Section 7.6.

          "Revolving Aggregate Committed Amount": the sum of the Total Revolving
Commitments as in effect on the Closing Date and the amount of any increases
therein effected pursuant to Section 2.1(c).

          "Revolving Commitment": as to any Lender, the obligation of such
Lender, if any, to make Revolving Loans and participate in Swingline Loans and
Letters of Credit in an aggregate principal and/or face amount not to exceed the
amount set forth under the heading "Revolving Commitment" opposite such Lender's
name on Schedule 1.1 or in the Assignment and Acceptance or New Lender
Supplement pursuant to which such Lender became a party hereto, as the same may
be changed from time to time pursuant to the terms hereof. The original amount
of the Total Revolving Commitments is $500,000,000.

          "Revolving Commitment Period": the period from and including the
Closing Date to the Revolving Termination Date.

          "Revolving Extensions of Credit": as to any Revolving Lender at any
time, an amount equal to the sum of (a) the aggregate principal amount of all
Revolving Loans held by such Lender then outstanding, (b) such Lender's
Revolving Percentage of the L/C Obligations then outstanding and (c) such
Lender's Revolving Percentage of the aggregate principal amount of Swingline
Loans then outstanding.

          "Revolving Facility": as defined in the definition of "Facility".

          "Revolving Lender": each Lender that has a Revolving Commitment or
that holds Revolving Loans.
<PAGE>

                                                                              20

          "Revolving Loans": as defined in Section 2.1(b).

          "Revolving Percentage": as to any Revolving Lender at any time, the
percentage which such Lender's Revolving Commitment then constitutes of the
Total Revolving Commitments (or, at any time after the Revolving Commitments
shall have expired or terminated, the percentage which the aggregate principal
amount of such Lender's Revolving Loans then outstanding constitutes of the
aggregate principal amount of the Revolving Loans then outstanding).

          "Revolving Termination Date": September 15, 2007.

          "SEC": the Securities and Exchange Commission, any successor thereto
and any analogous Governmental Authority.

          "Security Documents": the collective reference to the Guarantee and
Collateral Agreement, all other security documents hereafter delivered to the
Administrative Agent granting a Lien on any property of any Person to secure the
obligations and liabilities of any Loan Party under any Loan Document and any
separate guarantee agreement entered into by any Subsidiary in order to
guarantee the Obligations.

          "Single Employer Plan": any Plan that is covered by Title IV of ERISA,
but that is not a Multiemployer Plan.

          "Solvent": when used with respect to any Person, means that, as of any
date of determination, (a) the amount of the "present fair saleable value" of
the assets of such Person will, as of such date, exceed the amount of all
"liabilities of such Person, contingent or otherwise" after giving effect to the
expected value of rights of indemnity, contribution and subrogation, as of such
date, as such quoted terms are determined in accordance with applicable federal
and state laws governing determinations of the insolvency of debtors, (b) the
present fair saleable value of the assets of such Person will, as of such date,
be greater than the amount that will be required to pay the liability of such
Person on its debts as such debts become absolute and matured after giving
effect to the expected value of rights of indemnity, contribution and
subrogation, (c) such Person will not have, as of such date, an unreasonably
small amount of capital with which to conduct its business, and (d) such Person
will be able to pay its debts as they mature after giving effect to the expected
value of rights of indemnity, contribution and subrogation. For purposes of this
definition, (i) "debt" means liability on a "claim", and (ii) "claim" means any
(x) right to payment, whether or not such a right is reduced to judgment,
liquidated, unliquidated, fixed, contingent, matured, unmatured, disputed,
undisputed, legal, equitable, secured or unsecured or (y) right to an equitable
remedy for breach of performance if such breach gives rise to a right to
payment, whether or not such right to an equitable remedy is reduced to
judgment, fixed, contingent, matured or unmatured, disputed, undisputed, secured
or unsecured.

          "Specified Change of Control": a "Change of Control" or any defined
term having a comparable purpose contained in the documentation governing any
Indebtedness of Holdings or the Borrower.

          "Specified Intercompany Note": as defined in the definition of
Specified Non-Wholly Owned Subsidiary.
<PAGE>

                                                                              21

          "Specified Non-Wholly Owned Subsidiary": any Subsidiary of the
Borrower (other than a Wholly Owned Subsidiary) that (a) is designated as such
by the Borrower in a written notice to the Administrative Agent substantially
concurrently with the acquisition thereof and (b) has issued an intercompany
note (a "Specified Intercompany Note") to the Borrower or any Wholly Owned
Qualifying Subsidiary Guarantor representing amounts actually loaned to such
Subsidiary, which note (i) shall be in form and substance satisfactory to the
Administrative Agent and (ii) shall be secured by a valid and perfected Lien on
all assets of such Subsidiary that fall within any of the categories of
"Collateral" referred to in the Guarantee and Collateral Agreement.

          "Subsidiary": as to any Person, a corporation, partnership, limited
liability company or other entity of which shares of stock or other ownership
interests having ordinary voting power (other than stock or such other ownership
interests having such power only by reason of the happening of a contingency) to
elect a majority of the board of directors or other managers of such
corporation, partnership or other entity are at the time owned, or the
management of which is otherwise controlled, directly or indirectly through one
or more intermediaries, or both, by such Person; provided, that, except as
otherwise specified in this Agreement, Unrestricted Subsidiaries shall be deemed
not to constitute "Subsidiaries" for the purposes of this Agreement (other than
the definitions of "Unrestricted Borrower Subsidiary", "Unrestricted Holdings
Subsidiary" and "Unrestricted Subsidiary" and Sections 6.11 and 7.15). Unless
otherwise qualified, all references to a "Subsidiary" or to "Subsidiaries" in
this Agreement shall refer to a Subsidiary or Subsidiaries of the Borrower.

          "Subsidiary Guarantor": each Subsidiary of the Borrower other than
(a) the GTE JV, (b) the Australian Subsidiary and its Subsidiaries and (c) any
Specified Non-Wholly Owned Subsidiary and its Subsidiaries.

          "Swingline Commitment": the obligation of the Swingline Lender to make
Swingline Loans pursuant to Section 2.4 in an aggregate principal amount at any
one time outstanding not to exceed $15,000,000.

          "Swingline Lender": Chase, in its capacity as the lender of Swingline
Loans.

          "Swingline Loans": as defined in Section 2.4(a).

          "Swingline Participation Amount": as defined in Section 2.5(c).

          "Syndication Agents": as defined in the preamble hereto.

          "Term Lenders": the collective reference to the Tranche A Term
Lenders, the Tranche B Term Lenders and the Incremental Term Lenders.

          "Term Loans": the collective reference to the Tranche A Term Loans,
Tranche B Term Loans and Incremental Term Loans.

          "Total Revolving Commitments": at any time, the aggregate amount of
the Revolving Commitments then in effect.
<PAGE>

                                                                              22

          "Total Revolving Extensions of Credit": at any time, the aggregate
amount of the Revolving Extensions of Credit of the Revolving Lenders
outstanding at such time.

          "Tower SPV": a Wholly Owned Subsidiary of the Borrower formed for the
sole purpose of holding communications tower facilities.

          "Tranche A Aggregate Funded Amount": the sum of the aggregate
principal amount of Tranche A Term Loans made pursuant to Section 2.1(a) and the
aggregate principal amount of Tranche A Term Loans made pursuant to Section
2.1(c).

          "Tranche A Term Commitment": as to any Lender, the obligation of such
Lender, if any, to make a Tranche A Term Loan to the Borrower hereunder in a
principal amount not to exceed the amount set forth under the heading "Tranche A
Term Commitment" opposite such Lender's name on Schedule 1.1. The original
aggregate amount of the Tranche A Term Commitments is $300,000,000.

          "Tranche A Term Facility": as defined in the definition of "Facility".

          "Tranche A Term Lender": each Lender that has a Tranche A Term
Commitment or is the holder of a Tranche A Term Loan.

          "Tranche A Term Loan": as defined in Section 2.1(a).

          "Tranche A Term Percentage": as to any Tranche A Term Lender at any
time, the percentage which the aggregate principal amount of such Lender's
Tranche A Term Loans then outstanding constitutes of the aggregate principal
amount of all Tranche A Term Loans then outstanding.

          "Tranche B Aggregate Funded Amount": the aggregate principal amount of
Tranche B Term Loans made on the Closing Date.

          "Tranche B Term Commitment": as to any Lender, the obligation of such
Lender, if any, to make a Tranche B Term Loan to the Borrower hereunder in a
principal amount not to exceed the amount set forth under the heading "Tranche B
Term Commitment" opposite such Lender's name on Schedule 1.1. The original
aggregate amount of the Tranche B Term Commitments is $400,000,000.

          "Tranche B Term Facility": as defined in the definition of "Facility".

          "Tranche B Term Lender": each Lender that has a Tranche B Term
Commitment or that holds a Tranche B Term Loan.

          "Tranche B Term Loan": as defined in Section 2.1(a).

          "Tranche B Term Percentage": as to any Tranche B Lender at any time,
the percentage which such Lender's Tranche B Term Commitment then constitutes of
the aggregate Tranche B Term Commitments (or, at any time after the Closing
Date, the percentage which the aggregate principal amount of such Lender's
Tranche B Term Loans then outstanding constitutes of the aggregate principal
amount of the Tranche B Term Loans then outstanding).


<PAGE>

                                                                              23

          "Transferee": any Assignee or Participant.

          "Type": as to any Loan, its nature as an ABR Loan or a Eurodollar
Loan.

          "United States": the United States of America.

          "Unrestricted Borrower Subsidiary": (a) any Subsidiary of the Borrower
created, acquired or activated by the Borrower or any of its Subsidiaries and
designated as such by the Borrower substantially concurrently with such
creation, acquisition or activation and (b) any Subsidiary of such designated
Subsidiary, provided, that (i) at no time shall any creditor of any such
Subsidiary have any claim (whether pursuant to a Guarantee Obligation, by
operation of law or otherwise) against Holdings or any of its other Subsidiaries
(other than another Unrestricted Borrower Subsidiary) in respect of any
Indebtedness or other obligation of any such Subsidiary; (ii) neither of
Holdings nor any of its Subsidiaries (other than another Unrestricted Borrower
Subsidiary) shall become a general partner of any such Subsidiary; (iii) no
default with respect to any Indebtedness of any such Subsidiary (including any
right which the holders thereof may have to take enforcement action against any
such Subsidiary) shall permit (upon notice, lapse of time or both) any holder of
any Indebtedness of Holdings or its other Subsidiaries (other than another
Unrestricted Borrower Subsidiary) to declare a default on such other
Indebtedness or cause the payment thereof to be accelerated or payable prior to
its final scheduled maturity; (iv) all Capital Stock of such Subsidiary shall be
held at all times by an Unrestricted Subsidiary SPV; and (v) at the time of such
designation, no Default or Event of Default shall have occurred and be
continuing or would result therefrom.

          "Unrestricted Holdings Subsidiary": (a) any Subsidiary of Holdings
(other than the Borrower and its Subsidiaries) created, acquired or activated by
Holdings or any of its Subsidiaries (other than the Borrower and its
Subsidiaries) and designated as such by Holdings substantially concurrently with
such creation, acquisition or activation and (b) any Subsidiary of such
designated Subsidiary, provided, that (i) at no time shall any creditor of any
such Subsidiary have any claim (whether pursuant to a Guarantee Obligation, by
operation of law or otherwise) against Holdings or any of its other Subsidiaries
(other than another Unrestricted Holdings Subsidiary) in respect of any
Indebtedness or other obligation of any such Subsidiary; (ii) neither Holdings
nor any of its Subsidiaries (other than another Unrestricted Holdings
Subsidiary) shall become a general partner of any such Subsidiary; (iii) no
default with respect to any Indebtedness of any such Subsidiary (including any
right which the holders thereof may have to take enforcement action against any
such Subsidiary) shall permit (upon notice, lapse of time or both) any holder of
any Indebtedness of Holdings or its other Subsidiaries (other than another
Unrestricted Holdings Subsidiary) to declare a default on such other
Indebtedness or cause the payment thereof to be accelerated or payable prior to
its final scheduled maturity; (iv) all Capital Stock of such Subsidiary shall be
held at all times by an Unrestricted Subsidiary SPV; and (v) at the time of such
designation, no Default or Event of Default shall have occurred and be
continuing or would result therefrom.

          "Unrestricted Subsidiaries": the collective reference to the
Unrestricted Borrower Subsidiaries and the Unrestricted Holdings Subsidiaries.
It is understood that Unrestricted Subsidiaries shall be disregarded for the
purposes of any calculation pursuant to this Agreement relating to financial
matters with respect to the Borrower. Notwithstanding anything to the contrary
contained in this Agreement, (x) so long as any Australian Intercompany Loans
are outstanding, the Australian Subsidiary shall not be an Unrestricted
Subsidiary, (y) the GTE JV shall not be an Unrestricted Subsidiary and (z) no
Tower SPV or Unrestricted Subsidiary SPV shall be an Unrestricted Subsidiary.

<PAGE>

                                                                              24

          "Unrestricted Subsidiary SPV": a Wholly Owned Subsidiary of Holdings
or the Borrower, as the case may be, formed for the sole purpose of holding the
Capital Stock of one or more Unrestricted Subsidiaries.

          "Wholly Owned Subsidiary": as to any Person, any other Person all of
the Capital Stock of which (other than directors' qualifying shares required by
law) is owned by such Person directly and/or through other Wholly Owned
Subsidiaries.

          "Wholly Owned Subsidiary Guarantor": any Subsidiary Guarantor that is
a Wholly Owned Subsidiary of the Borrower.

          "Wholly Owned Qualifying Subsidiary Guarantor": any Wholly Owned
Subsidiary Guarantor organized under the laws of any jurisdiction within the
United States, the United Kingdom or Australia.

          1.2 Other Definitional Provisions. (a) Unless otherwise specified
therein, all terms defined in this Agreement shall have the defined meanings
when used in the other Loan Documents or any certificate or other document made
or delivered pursuant hereto or thereto.

          (b) As used herein and in the other Loan Documents, and any
certificate or other document made or delivered pursuant hereto or thereto,
(i) accounting terms relating to Holdings, the Borrower and its Subsidiaries not
defined in Section 1.1 and accounting terms partly defined in Section 1.1, to
the extent not defined, shall have the respective meanings given to them under
GAAP, (ii) the words "include", "includes" and "including" shall be deemed to be
followed by the phrase "without limitation", (iii) the word "incur" shall be
construed to mean incur, create, issue, assume, become liable in respect of or
suffer to exist (and the words "incurred" and "incurrence" shall have
correlative meanings), and (iv) the words "asset" and "property" shall be
construed to have the same meaning and effect and to refer to any and all
tangible and intangible assets and properties, including cash, Capital Stock,
securities, revenues, accounts, leasehold interests and contract rights.

          (c) The words "hereof", "herein" and "hereunder" and words of similar
import when used in this Agreement shall refer to this Agreement as a whole and
not to any particular provision of this Agreement, and Section, Schedule and
Exhibit references are to this Agreement unless otherwise specified.

          (d) The meanings given to terms defined herein shall be equally
applicable to both the singular and plural forms of such terms.

          (e) For the purposes of calculating Consolidated EBITDA and
Consolidated Cash Interest Expense for any period of four consecutive fiscal
quarters (each, a "Reference Period") pursuant to any determination of the
Consolidated Leverage Ratio or the Consolidated Debt Service Coverage Ratio,
(i) if at any time during such Reference Period the Borrower or any Subsidiary
shall have made any Material Disposition, the Consolidated EBITDA for such
Reference Period shall be reduced by an amount equal to the Consolidated EBITDA
(if positive) attributable to the property that is the subject of such Material
Disposition for such Reference Period or increased by an amount equal to the
Consolidated EBITDA (if negative) attributable thereto for such Reference
Period, and Consolidated Cash Interest Expense for such Reference Period shall
be reduced by an amount equal to the Consolidated Cash

<PAGE>

                                                                              25

Interest Expense for such Reference Period attributable to any Indebtedness of
the Borrower or any Subsidiary repaid, repurchased, defeased or otherwise
discharged with respect to the Borrower and its Subsidiaries in connection with
such Material Disposition (or, if the Capital Stock of any Subsidiary is sold,
the Consolidated Cash Interest Expense for such Reference Period directly
attributable to the Indebtedness of such Subsidiary to the extent the Borrower
and its continuing Subsidiaries are no longer liable for such Indebtedness after
such Disposition) and (ii) if during such Reference Period the Borrower or any
Subsidiary shall have made a Material Acquisition, Consolidated EBITDA and
Consolidated Cash Interest Expense for such Reference Period shall be calculated
after giving pro forma effect thereto (including the incurrence or assumption of
any Indebtedness in connection therewith) as if such Material Acquisition (and
the incurrence or assumption of any such Indebtedness) occurred on the first day
of such Reference Period. As used herein, "Material Acquisition" means any
acquisition of property or series of related acquisitions of property that
(a) constitutes assets comprising all or substantially all of an operating unit
of a business or constitutes all or substantially all of the common stock of a
Person and (b) involves the payment of consideration by the Borrower and its
Subsidiaries in excess of $1,000,000; and "Material Disposition" means any
Disposition of property or series of related Dispositions of property that
yields gross proceeds to the Borrower or any of its Subsidiaries in excess of
$1,000,000.

                  SECTION 2. AMOUNT AND TERMS OF COMMITMENTS

          2.1 Commitments; Increases in the Tranche A Term Facility and the
Revolving Facility; Incremental Term Loans. (a) Subject to the terms and
conditions hereof, (i) each Tranche A Term Lender severally agrees to make one
or more term loans (each, a "Tranche A Term Loan") to the Borrower in an
aggregate amount not to exceed the amount of the Tranche A Term Commitment of
such Lender, (ii) each Tranche B Term Lender severally agrees to make a term
loan (each, a "Tranche B Term Loan") to the Borrower in an amount not to exceed
the amount of the Tranche B Term Commitment of such Lender and (iii) each
Incremental Term Lender severally agrees to make one or more term loans (each,
an "Incremental Term Loan") to the extent provided in Section 2.1(c). The Term
Loans may from time to time be Eurodollar Loans or ABR Loans, as determined by
the Borrower and notified to the Administrative Agent in accordance with
Sections 2.2 and 2.10. Except as otherwise provided in Section 2.1(c), Tranche A
Term Loans may only be made during the period (the "Tranche A Commitment
Period") from and including the Closing Date to the date that is 18 months
thereafter (such date, the "Tranche A Commitment Termination Date"); provided,
that $150,000,000 of the Tranche A Term Commitments must be used (if at all) on
or prior to the first anniversary of the Closing Date. The Tranche A Term
Commitments shall automatically be permanently reduced by the amount of any
borrowing thereunder. Any unutilized Tranche A Term Commitments shall
automatically terminate on the Tranche A Commitment Termination Date. Tranche B
Term Loans may only be made on the Closing Date.

          (b) Subject to the terms and conditions hereof, each Revolving Lender
severally agrees to make revolving credit loans ("Revolving Loans") to the
Borrower from time to time during the Revolving Commitment Period in an
aggregate principal amount at any one time outstanding which, when added to such
Lender's Revolving Percentage of the sum of (i) the L/C Obligations then
outstanding and (ii) the aggregate principal amount of the Swingline Loans then
outstanding, does not exceed the amount of such Lender's Revolving Commitment.
During the Revolving Commitment Period the Borrower may use the Revolving
Commitments by borrowing, prepaying the Revolving Loans in whole or in part, and
reborrowing, all in accordance with the terms and conditions hereof. The
Revolving Loans may from time to time be Eurodollar Loans or ABR Loans, as
determined by the Borrower and notified to the
<PAGE>

                                                                              26

Administrative Agent in accordance with Sections 2.2 and 2.10. Notwithstanding
anything to the contrary in this Agreement, the Borrower may not borrow more
than $25,000,000 of Revolving Loans prior to the later to occur of (i) the date
on which the Tranche A Term Facility shall have been fully utilized or is no
longer available and (ii) the date on which at least $425,000,000 of cash held
by Holdings on January 1, 2000 shall have been contributed to the Borrower or
any of the Borrower's Subsidiaries.

          (c) The Borrower and any one or more Lenders (including New Lenders)
may from time to time agree that such Lenders shall make, obtain or increase the
amount of their Tranche A Term Loans, Tranche A Term Commitments, Incremental
Term Loans or Revolving Commitments, as applicable, by executing and delivering
to the Administrative Agent an Increased Facility Activation Notice specifying
(i) the amount of such increase and the Facility or Facilities involved,
(ii) the applicable Increased Facility Closing Date and (iii) in the case of
Incremental Term Loans, (x) the applicable Incremental Term Maturity Date,
(y) the amortization schedule for such Incremental Term Loans, which shall
comply with Section 2.3, and (z) the Applicable Margin for such Incremental Term
Loans. Notwithstanding the foregoing, without the consent of the Required
Lenders, (i) the aggregate amount of borrowings of Incremental Term Loans shall
not exceed an amount equal to (x) $300,000,000 minus (y) the aggregate amount of
incremental Tranche A Term Loans, incremental Tranche A Term Commitments or
incremental Revolving Commitments obtained pursuant to this paragraph, (ii) the
aggregate amount of incremental Tranche A Term Loans, incremental Tranche A Term
Commitments and/or incremental Revolving Commitments obtained pursuant to this
paragraph shall not exceed $200,000,000, (iii) incremental Tranche A Term Loans,
incremental Tranche A Term Commitments, Incremental Term Loans and incremental
Revolving Commitments may not be made, obtained or increased on or after the
second anniversary of the Closing Date or after the occurrence and during the
continuation of a Default or Event of Default, (iv) each increase effected
pursuant to this paragraph shall be in a minimum amount of at least $50,000,000
and (v) no more than five Increased Facility Closing Dates may be selected by
the Borrower during the term of this Agreement. Any incremental Tranche A Term
Loans, incremental Tranche A Term Commitments, Incremental Term Loans and
incremental Revolving Commitments shall be governed by this Agreement and the
other Loan Documents and be on terms no more restrictive when viewed as a whole
than those set forth herein and therein. No Lender shall have any obligation to
participate in any increase described in this paragraph unless it agrees to do
so in its sole discretion. Notwithstanding the foregoing, no increase described
in this paragraph may be made or obtained unless and until the Borrower has
delivered to the Administrative Agent revised Projections taking into account
such increase.

          (d) Any additional bank, financial institution or other entity which,
with the consent of the Borrower and the Administrative Agent (which consent
shall not be unreasonably withheld), elects to become a "Lender" under this
Agreement in connection with any transaction described in Section 2.1(c) shall
execute a New Lender Supplement (each, a "New Lender Supplement"), substantially
in the form of Exhibit D-1, whereupon such bank, financial institution or other
entity (a "New Lender") shall become a Lender for all purposes and to the same
extent as if originally a party hereto and shall be bound by and entitled to the
benefits of this Agreement.

          (e) Unless otherwise agreed by the Administrative Agent, on each
Increased Facility Closing Date (other than in respect of Incremental Term
Loans), the Borrower shall borrow Tranche A Term Loans under the increased
Tranche A Term Facility, or shall borrow Revolving Loans under the increased
Revolving Commitments, as the case may be, from each Lender participating in the
relevant increase in an amount determined by reference to the amount of each
Type of Loan (and, in the case of
<PAGE>

                                                                              27

Eurodollar Loans, of each Eurodollar Tranche) which would then have been
outstanding from such Lender if (i) each such Type or Eurodollar Tranche had
been borrowed or effected on such Increased Facility Closing Date and (ii) the
aggregate amount of each such Type or Eurodollar Tranche requested to be so
borrowed or effected had been proportionately increased. The Eurodollar Base
Rate applicable to any Eurodollar Loan borrowed pursuant to the preceding
sentence shall equal the Eurodollar Base Rate then applicable to the Eurodollar
Loans of the other Lenders in the same Eurodollar Tranche (or, until the
expiration of the then-current Interest Period, such other rate as shall be
agreed upon between the Borrower and the relevant Lender).

          2.2 Procedure for Borrowing. In order to effect a borrowing hereunder,
the Borrower shall give the Administrative Agent irrevocable notice (which
notice must be received by the Administrative Agent prior to 12:00 Noon., New
York City time, (a) three Business Days prior to the requested Borrowing Date,
in the case of Eurodollar Loans, or (b) one Business Day prior to the requested
Borrowing Date, in the case of ABR Loans), specifying (i) the Facility under
which such borrowing is to be made, (ii) the amount and Type of Loans to be
borrowed, (iii) the requested Borrowing Date and (iv) in the case of Eurodollar
Loans, the respective amounts of each such Type of Loan and the respective
lengths of the initial Interest Period therefor. Any Loans made on the Closing
Date shall initially be ABR Loans. Each borrowing shall be in an aggregate
amount equal to (x) in the case of ABR Loans, $5,000,000 or a whole multiple of
$1,000,000 in excess thereof (or, if the then aggregate Available Revolving
Commitments are less than $5,000,000, such lesser amount) and (y) in the case of
Eurodollar Loans, $10,000,000 or a whole multiple of $1,000,000 in excess
thereof; provided, that the Swingline Lender may request, on behalf of the
Borrower, borrowings under the Revolving Commitments that are ABR Loans in other
amounts pursuant to Section 2.5. Upon receipt of any such notice from the
Borrower, the Administrative Agent shall promptly notify each relevant Lender
thereof. Each relevant Lender will make the amount of its pro rata share of each
borrowing available to the Administrative Agent for the account of the Borrower
at the Funding Office prior to 12:00 Noon, New York City time, on the Borrowing
Date requested by the Borrower in funds immediately available to the
Administrative Agent. Such borrowing will then be made available to the Borrower
by the Administrative Agent crediting the account of the Borrower on the books
of such office with the aggregate of the amounts made available to the
Administrative Agent by the relevant Lenders and in like funds as received by
the Administrative Agent.

          2.3 Repayment of Loans; Early Maturity. (a) The Tranche A Term Loans
of each Tranche A Term Lender shall mature in 18 consecutive quarterly
installments, commencing on June 30, 2003, each of which shall be in an amount
equal to such Lender's Tranche A Term Percentage multiplied by the percentage of
the Tranche A Aggregate Funded Amount set forth below opposite such installment:

          Date                           Percentage
          ----                           ----------
          June 30, 2003                   1.25%
          September 30, 2003              1.25%
          December 31,  2003              1.25%
          March 31, 2004                  1.25%
          June 30, 2004                  4.375%
          September 30, 2004             4.375%
          December 31, 2004              4.375%
          March 31, 2005                 4.375%
          June 30, 2005                  5.625%
<PAGE>

                                                                              28

          September 30, 2005             5.625%
          December 31, 2005              5.625%
          March 31, 2006                 5.625%
          June 30, 2006                   7.50%
          September 30, 2006              7.50%
          December 31, 2006               7.50%
          March 31, 2007                  7.50%
          June 30, 2007                  12.50%
          September 15, 2007             12.50%

          (b) The Tranche B Term Loans of each Tranche B Term Lender shall
mature in 20 consecutive quarterly installments (each due on the last day of
each calendar quarter, except for the last such installment), commencing on June
30, 2003, each of which shall be in an amount equal to such Lender's Tranche B
Term Percentage multiplied by (i) in the case of the first 19 such installments,
0.25% of the Tranche B Aggregate Funded Amount and (ii) in the case of the last
such installment (which shall be due on March 15, 2008), 95.25% of the Tranche B
Aggregate Funded Amount.

          (c) The Incremental Term Loans of each Incremental Term Lender shall
mature in consecutive installments (which shall be no more frequent than
quarterly) as specified in the Increased Facility Activation Notice pursuant to
which such Incremental Term Loans were made, provided that the Incremental Term
Loans shall have (i) a longer weighted average life than the Tranche A Term
Facility, the Tranche B Term Facility and the Revolving Facility (taken as a
whole) and (ii) a final maturity no earlier than the date that is six months
after the final maturity of the Tranche B Term Loans.

          (d) The Total Revolving Commitments shall be permanently reduced on
each of the dates set forth below by an aggregate amount equal to the percentage
of the Revolving Aggregate Committed Amount set forth opposite such date:

          Installment                       Percentage
          -----------                       ----------
          June 30, 2003                      1.25%
          September 30, 2003                 1.25%
          December 31, 2003                  1.25%
          March 31, 2004                     1.25%
          June 30, 2004                     4.375%
          September 30, 2004                4.375%
          December 31, 2004                 4.375%
          March 31, 2005                    4.375%
          June 30, 2005                     5.625%
          September 30, 2005                5.625%
          December 31, 2005                 5.625%
          March 31, 2006                    5.625%
          June 30, 2006                      7.50%
          September 30, 2006                 7.50%
          December 31, 2006                  7.50%
          March 31, 2007                     7.50%
          June 30, 2007                     12.50%
          September 15, 2007                12.50%
<PAGE>

                                                                              29

          (e) Any reduction or termination of the Revolving Commitments pursuant
to this Section 2.3 shall be accompanied by prepayment of the Revolving Loans
and/or Swingline Loans to the extent that the Total Revolving Extensions of
Credit exceed the amount of the Total Revolving Commitments after giving effect
thereto, provided that if the aggregate principal amount of Revolving Loans and
Swingline Loans then outstanding is less than the amount of such excess (because
L/C Obligations constitute a portion thereof), the Borrower shall, to the extent
of the balance of such excess, replace outstanding Letters of Credit and/or
deposit an amount in cash in a cash collateral account established with the
Administrative Agent for the benefit of the Lenders on terms and conditions
satisfactory to the Administrative Agent. The application of any prepayment
pursuant to this paragraph shall be made, first, to ABR Loans and, second, to
Eurodollar Loans. Each prepayment of the Loans under this paragraph (other than
ABR Loans and Swingline Loans) shall be accompanied by accrued interest to the
date of such prepayment on the amount prepaid.

          (f) Notwithstanding anything to the contrary in this Agreement, all
outstanding Loans shall be repaid and all outstanding Commitments shall be
terminated on the date that is six months prior to the date of any scheduled
maturity or redemption of Indebtedness or preferred stock of Holdings. For
avoidance of doubt, if any Indebtedness or preferred stock of Holdings is
refinanced or otherwise extended such that it becomes scheduled to mature or be
redeemed on a later date, such Indebtedness or preferred stock will be
considered thereafter to be scheduled to mature or be redeemed on such later
date.

          2.4 Swingline Commitment. (a) Subject to the terms and conditions
hereof, the Swingline Lender agrees to make a portion of the credit otherwise
available to the Borrower under the Revolving Commitments from time to time
during the Revolving Commitment Period by making swingline loans ("Swingline
Loans") to the Borrower; provided that (i) the aggregate principal amount of
Swingline Loans outstanding at any time shall not exceed the Swingline
Commitment then in effect (notwithstanding that the Swingline Loans outstanding
at any time, when aggregated with the Swingline Lender's other outstanding
Revolving Loans hereunder, may exceed the Swingline Commitment then in effect)
and (ii) the Borrower shall not request, and the Swingline Lender shall not
make, any Swingline Loan if, after giving effect to the making of such Swingline
Loan, the aggregate amount of the Available Revolving Commitments would be less
than zero. During the Revolving Commitment Period, the Borrower may use the
Swingline Commitment by borrowing, repaying and reborrowing, all in accordance
with the terms and conditions hereof. Swingline Loans shall be ABR Loans only.

          (b) The Borrower shall repay all outstanding Swingline Loans on the
Revolving Termination Date.

          2.5 Procedure for Swingline Borrowing; Refunding of Swingline Loans.
(a) Whenever the Borrower desires that the Swingline Lender make Swingline Loans
it shall give the Swingline Lender irrevocable telephonic notice confirmed
promptly in writing (which telephonic notice must be received by the Swingline
Lender not later than 2:00 P.M., New York City time, on the proposed Borrowing
Date), specifying (i) the amount to be borrowed and (ii) the requested Borrowing
Date (which shall be a Business Day during the Revolving Commitment Period).
Each borrowing under the Swingline Commitment shall be in an amount equal to
$1,000,000 or a whole multiple of $500,000 in excess thereof. Not later than
3:00 P.M., New York City time, on the Borrowing Date specified in a notice in
respect of Swingline Loans, the Swingline Lender shall make available to the
Administrative Agent at the Funding Office an amount in immediately available
funds equal to the amount of the Swingline Loan to be made by
<PAGE>

                                                                              30

the Swingline Lender. The Administrative Agent shall make the proceeds of such
Swingline Loan available to the Borrower on such Borrowing Date by depositing
such proceeds in the account of the Borrower with the Administrative Agent on
such Borrowing Date in immediately available funds.

          (b) The Swingline Lender, at any time and from time to time in its
sole and absolute discretion may, on behalf of the Borrower (which hereby
irrevocably directs the Swingline Lender to act on its behalf), on one Business
Day's notice given by the Swingline Lender no later than 12:00 Noon, New York
City time, request each Revolving Lender to make, and each Revolving Lender
hereby agrees to make, a Revolving Loan, in an amount equal to such Revolving
Lender's Revolving Percentage of the aggregate amount of the Swingline Loans
(the "Refunded Swingline Loans") outstanding on the date of such notice, to
repay the Swingline Lender. Each Revolving Lender shall make the amount of such
Revolving Loan available to the Administrative Agent at the Funding Office in
immediately available funds, not later than 10:00 A.M., New York City time, one
Business Day after the date of such notice. The proceeds of such Revolving Loans
shall be immediately made available by the Administrative Agent to the Swingline
Lender for application by the Swingline Lender to the repayment of the Refunded
Swingline Loans. The Borrower irrevocably authorizes the Swingline Lender to
charge the Borrower's accounts with the Administrative Agent (up to the amount
available in each such account) in order to immediately pay the amount of such
Refunded Swingline Loans to the extent amounts received from the Revolving
Lenders are not sufficient to repay in full such Refunded Swingline Loans.

          (c) If prior to the time a Revolving Loan would have otherwise been
made pursuant to Section 2.5(b), one of the events described in Section 8(f)
shall have occurred and be continuing with respect to the Borrower or if for any
other reason, as determined by the Swingline Lender in its sole discretion,
Revolving Loans may not be made as contemplated by Section 2.5(b), each
Revolving Lender shall, on the date such Revolving Loan was to have been made
pursuant to the notice referred to in Section 2.5(b) (the "Refunding Date"),
purchase for cash an undivided participating interest in the then outstanding
Swingline Loans by paying to the Swingline Lender an amount (the "Swingline
Participation Amount") equal to (i) such Revolving Lender's Revolving Percentage
times (ii) the sum of the aggregate principal amount of Swingline Loans then
outstanding that were to have been repaid with such Revolving Loans.

          (d) Whenever, at any time after the Swingline Lender has received from
any Revolving Lender such Lender's Swingline Participation Amount, the Swingline
Lender receives any payment on account of the Swingline Loans, the Swingline
Lender will distribute to such Lender its Swingline Participation Amount
(appropriately adjusted, in the case of interest payments, to reflect the period
of time during which such Lender's participating interest was outstanding and
funded and, in the case of principal and interest payments, to reflect such
Lender's pro rata portion of such payment if such payment is not sufficient to
pay the principal of and interest on all Swingline Loans then due); provided,
however, that in the event that such payment received by the Swingline Lender is
required to be returned, such Revolving Lender will return to the Swingline
Lender any portion thereof previously distributed to it by the Swingline Lender.

          (e) Each Revolving Lender's obligation to make the Loans referred to
in Section 2.5(b) and to purchase participating interests pursuant to Section
2.5(c) shall be absolute and unconditional and shall not be affected by any
circumstance, including (i) any setoff, counterclaim, recoupment, defense or
other right that such Revolving Lender or the Borrower may have against the
Swingline Lender, the Borrower or any other Person for any reason whatsoever;
(ii) the occurrence or continuance of a Default
<PAGE>

                                                                              31

or an Event of Default or the failure to satisfy any of the other conditions
specified in Section 5; (iii) any adverse change in the condition (financial or
otherwise) of the Borrower; (iv) any breach of this Agreement or any other Loan
Document by the Borrower, any other Loan Party or any other Revolving Lender; or
(v) any other circumstance, happening or event whatsoever, whether or not
similar to any of the foregoing.

          2.6 Commitment Fees, etc. (a) The Borrower agrees to pay to the
Administrative Agent for the account of each Revolving Lender a nonrefundable
commitment fee for the period from and including the Closing Date to the last
day of the Revolving Commitment Period, computed at the Commitment Fee Rate on
the average daily amount of the Available Revolving Commitment of such Lender
during the period for which payment is made, payable quarterly in arrears on the
last day of each March, June, September and December and on the Revolving
Termination Date, commencing on the first of such dates to occur after the date
hereof.

          (b) The Borrower agrees to pay to the Administrative Agent for the
account of each Tranche A Term Lender a nonrefundable commitment fee for the
period from and including the Closing Date to the date on which the Tranche A
Term Commitments have been terminated, computed at the Commitment Fee Rate on
the average daily amount of the Tranche A Term Commitment of such Lender during
the period for which payment is made, payable quarterly in arrears on the last
day of each March, June, September and December and on the date on which the
Tranche A Term Commitments have been fully utilized or terminated, as the case
may be, commencing on the first of such dates to occur after the date hereof.

          (c) The Borrower agrees to pay to the Agents the fees in the amounts
and on the dates previously agreed to in writing by the Borrower and the Agents.

          2.7 Termination or Reduction of Commitments. (a) The Borrower shall
have the right, upon not less than three Business Days' notice to the
Administrative Agent, to terminate the Revolving Commitments or, from time to
time, to reduce the amount of the Revolving Commitments; provided that no such
termination or reduction of Revolving Commitments shall be permitted if, after
giving effect thereto and to any prepayments of the Revolving Loans and
Swingline Loans made on the effective date thereof, the Total Revolving
Extensions of Credit would exceed the Total Revolving Commitments. Any such
reduction shall be in an amount equal to $10,000,000, or a whole multiple of
$1,000,000 in excess thereof, shall reduce permanently the Revolving Commitments
then in effect.

          (b) The Borrower shall have the right, upon not less than three
Business Days' notice to the Administrative Agent, to terminate the Tranche A
Term Commitment or, from time to time, to reduce the amount of the Tranche A
Term Commitments then in effect. Any such reduction shall be in an amount equal
to $10,000,000, or a whole multiple of $1,000,000 in excess thereof, shall
reduce permanently the Tranche A Term Commitments then in effect and shall be
applied pro rata to the scheduled reductions thereof.

          2.8 Optional Prepayments. The Borrower may at any time and from time
to time prepay the Loans, in whole or in part, without premium or penalty, upon
irrevocable notice delivered to the Administrative Agent at least three Business
Days prior thereto in the case of Eurodollar Loans and at least one Business Day
prior thereto in the case of ABR Loans, which notice shall specify the date and
amount of prepayment and whether the prepayment is of Eurodollar Loans or ABR
Loans; provided, that
<PAGE>

                                                                              32

if a Eurodollar Loan is prepaid on any day other than the last day of the
Interest Period applicable thereto, the Borrower shall also pay any amounts
owing pursuant to Section 2.18. Upon receipt of any such notice the
Administrative Agent shall promptly notify each relevant Lender thereof. If any
such notice is given, the amount specified in such notice shall be due and
payable on the date specified therein, together with (except in the case of
Revolving Loans that are ABR Loans and Swingline Loans) accrued interest to such
date on the amount prepaid. Partial prepayments of Term Loans and Revolving
Loans shall be in an aggregate principal amount of $5,000,000 or a whole
multiple of $1,000,000 in excess thereof. Partial prepayments of Swingline Loans
shall be in an aggregate principal amount of $1,000,000 or a whole multiple of
$500,000 in excess thereof.

          2.9 Mandatory Prepayments and Commitment Reductions. (a) If any
Indebtedness shall be incurred by the Borrower or any of its Subsidiaries
(excluding any Indebtedness incurred in accordance with Section 7.2), an amount
equal to 100% of the Net Cash Proceeds thereof shall be applied on the date of
such incurrence toward the prepayment of the Term Loans and the reduction of the
Tranche A Term Commitments and the Revolving Commitments as set forth in Section
2.9(d).

          (b) If on any date the Borrower or any of its Subsidiaries shall
receive Net Cash Proceeds from any Asset Sale or Recovery Event then, unless a
Reinvestment Notice shall be delivered in respect thereof, such Net Cash
Proceeds shall be applied on such date toward the prepayment of the Term Loans
and the reduction of the Tranche A Term Commitments and the Revolving
Commitments as set forth in Section 2.9(d); provided, that, notwithstanding the
foregoing, (i) the aggregate Net Cash Proceeds of Asset Sales and Recovery
Events that may be excluded from the foregoing requirement pursuant to a
Reinvestment Notice shall not exceed $20,000,000 in any fiscal year of the
Borrower and (ii) on each Reinvestment Prepayment Date, an amount equal to the
Reinvestment Prepayment Amount with respect to the relevant Reinvestment Event
shall be applied toward the prepayment of the Term Loans and the reduction of
the Tranche A Term Commitments and the Revolving Commitments as set forth in
Section 2.9(d).

          (c) If, for any fiscal year of the Borrower commencing with the fiscal
year ending December 31, 2003, there shall be Excess Cash Flow, the Borrower
shall, on the relevant Excess Cash Flow Application Date, apply 50% of such
Excess Cash Flow toward the prepayment of the Term Loans and the reduction of
the Tranche A Term Commitments and the Revolving Commitments as set forth in
Section 2.9(d). Each such prepayment and commitment reduction shall be made on a
date (an "Excess Cash Flow Application Date") no later than five days after the
earlier of (i) the date on which the financial statements of the Borrower
referred to in Section 6.1(a), for the fiscal year with respect to which such
prepayment is made, are required to be delivered to the Lenders and (ii) the
date such financial statements are actually delivered.

          (d) Amounts to be applied in connection with prepayments and
Commitment reductions made pursuant to Section 2.9 shall be applied, first, to
prepay the Term Loans, second, to reduce permanently the then unused Tranche A
Term Commitments and, third, to reduce permanently the Revolving Commitments.
Any such reduction of the Revolving Commitments shall be accompanied by
prepayment of the Revolving Loans and/or Swingline Loans to the extent, if any,
that the Total Revolving Extensions of Credit exceed the amount of the Total
Revolving Commitments as so reduced, provided that if the aggregate principal
amount of Revolving Loans and Swingline Loans then outstanding is less than the
amount of such excess (because L/C Obligations constitute a portion thereof),
the Borrower shall, to the extent of the balance of such excess, replace
outstanding Letters of Credit and/or deposit an amount
<PAGE>

                                                                              33

in cash in a cash collateral account established with the Administrative Agent
for the benefit of the Lenders on terms and conditions satisfactory to the
Administrative Agent. The application of any prepayment pursuant to Section 2.9
shall be made, first, to ABR Loans and, second, to Eurodollar Loans. Each
prepayment of the Loans under Section 2.9 (except in the case of Revolving Loans
that are ABR Loans and Swingline Loans) shall be accompanied by accrued interest
to the date of such prepayment on the amount prepaid.

          2.10 Conversion and Continuation Options. (a) The Borrower may elect
from time to time to convert Eurodollar Loans to ABR Loans by giving the
Administrative Agent at least two Business Days' prior irrevocable notice of
such election, provided that any such conversion of Eurodollar Loans may only be
made on the last day of an Interest Period with respect thereto. The Borrower
may elect from time to time to convert ABR Loans to Eurodollar Loans by giving
the Administrative Agent at least three Business Days' prior irrevocable notice
of such election (which notice shall specify the length of the initial Interest
Period therefor), provided that no ABR Loan under a particular Facility may be
converted into a Eurodollar Loan when any Event of Default has occurred and is
continuing and the Administrative Agent or the Majority Facility Lenders in
respect of such Facility have determined in its or their sole discretion not to
permit such conversions. Upon receipt of any such notice the Administrative
Agent shall promptly notify each relevant Lender thereof.

          (b) Any Eurodollar Loan may be continued as such upon the expiration
of the then current Interest Period with respect thereto by the Borrower giving
irrevocable notice to the Administrative Agent, in accordance with the
applicable provisions of the term "Interest Period" set forth in Section 1.1, of
the length of the next Interest Period to be applicable to such Loans, provided
that no Eurodollar Loan under a particular Facility may be continued as such
when any Event of Default has occurred and is continuing and the Administrative
Agent has or the Majority Facility Lenders in respect of such Facility have
determined in its or their sole discretion not to permit such continuations, and
provided, further, that if the Borrower shall fail to give any required notice
as described above in this paragraph or if such continuation is not permitted
pursuant to the preceding proviso each such Loan shall be automatically
converted to a Eurodollar Loan with an Interest Period of one month on the last
day of such then expiring Interest Period. Upon receipt of any such notice the
Administrative Agent shall promptly notify each relevant Lender thereof.

          2.11 Limitations on Eurodollar Tranches. Notwithstanding anything to
the contrary in this Agreement, all borrowings, conversions and continuations of
Eurodollar Loans hereunder and all selections of Interest Periods hereunder
shall be in such amounts and be made pursuant to such elections so that,
(a) after giving effect thereto, the aggregate principal amount of the
Eurodollar Loans comprising each Eurodollar Tranche shall be equal to
$10,000,000 or a whole multiple of $1,000,000 in excess thereof and (b) no more
than twenty Eurodollar Tranches shall be outstanding at any one time.

          2.12 Interest Rates and Payment Dates. (a) Each Eurodollar Loan shall
bear interest for each day during each Interest Period with respect thereto at a
rate per annum equal to the Eurodollar Rate determined for such day plus the
Applicable Margin.

          (b) Each ABR Loan shall bear interest at a rate per annum equal to the
ABR plus the Applicable Margin.
<PAGE>

                                                                              34

          (c) (i) If all or a portion of the principal amount of any Loan or
Reimbursement Obligation shall not be paid when due (whether at the stated
maturity, by acceleration or otherwise), such overdue amount shall bear interest
at a rate per annum equal to (x) in the case of the Loans, the rate that would
otherwise be applicable thereto pursuant to the foregoing provisions of this
Section plus 2% or (y) in the case of Reimbursement Obligations, the rate
applicable to ABR Loans under the Revolving Facility plus 2%, and (ii) if all or
a portion of any interest payable on any Loan or Reimbursement Obligation or any
commitment fee or other amount payable hereunder shall not be paid when due
(whether at the stated maturity, by acceleration or otherwise), such overdue
amount shall bear interest at a rate per annum equal to the rate then applicable
to ABR Loans under the relevant Facility plus 2% (or, in the case of any such
other amounts that do not relate to a particular Facility, the rate then
applicable to ABR Loans under the Revolving Facility plus 2%), in each case,
with respect to clauses (i) and (ii) above, from the date of such non-payment
until such amount is paid in full (as well after as before judgment).

          (d) Interest shall be payable in arrears on each Interest Payment
Date, provided that interest accruing pursuant to paragraph (c) of this Section
shall be payable from time to time on demand.

          2.13 Computation of Interest and Fees. (a) Interest and fees payable
pursuant hereto shall be calculated on the basis of a 360-day year for the
actual days elapsed, except that, with respect to ABR Loans the rate of interest
on which is calculated on the basis of the Prime Rate, the interest thereon
shall be calculated on the basis of a 365- (or 366-, as the case may be) day
year for the actual days elapsed. The Administrative Agent shall as soon as
practicable notify the Borrower and the relevant Lenders of each determination
of a Eurodollar Rate. Any change in the interest rate on a Loan resulting from a
change in the ABR or the Eurocurrency Reserve Requirements shall become
effective as of the opening of business on the day on which such change becomes
effective. The Administrative Agent shall as soon as practicable notify the
Borrower and the relevant Lenders of the effective date and the amount of each
such change in interest rate.

          (b) Each determination of an interest rate by the Administrative Agent
pursuant to any provision of this Agreement shall be conclusive and binding on
the Borrower and the Lenders in the absence of manifest error. The
Administrative Agent shall, at the request of the Borrower, deliver to the
Borrower a statement showing the quotations used by the Administrative Agent in
determining any interest rate pursuant to Section 2.12(a).

          2.14 Inability to Determine Interest Rate. If prior to the first day
of any Interest Period:

          (a) the Administrative Agent shall have determined (which
determination shall be conclusive and binding upon the Borrower) that, by reason
of circumstances affecting the relevant market, adequate and reasonable means do
not exist for ascertaining the Eurodollar Rate for such Interest Period, or

          (b) the Administrative Agent shall have received notice from the
Majority Facility Lenders in respect of the relevant Facility that the
Eurodollar Rate determined or to be determined for such Interest Period will not
adequately and fairly reflect the cost to such Lenders (as conclusively
certified by such Lenders) of making or maintaining their affected Loans during
such Interest Period,
<PAGE>

                                                                              35

the Administrative Agent shall give telecopy or telephonic notice thereof to the
Borrower and the relevant Lenders as soon as practicable thereafter. If such
notice is given (x) any Eurodollar Loans under the relevant Facility requested
to be made on the first day of such Interest Period shall be made as ABR Loans,
(y) any Loans under the relevant Facility that were to have been converted on
the first day of such Interest Period to Eurodollar Loans shall be continued as
ABR Loans and (z) any outstanding Eurodollar Loans under the relevant Facility
shall be converted, on the last day of the then-current Interest Period, to ABR
Loans. Until such notice has been withdrawn by the Administrative Agent, no
further Eurodollar Loans under the relevant Facility shall be made or continued
as such, nor shall the Borrower have the right to convert Loans under the
relevant Facility to Eurodollar Loans.

          2.15 Pro Rata Treatment and Payments. (a) Except in the case of the
Incremental Term Facility, each borrowing by the Borrower from the Lenders
hereunder, each payment by the Borrower on account of any commitment fee and any
reduction of the Commitments of the Lenders shall be made pro rata according to
the respective Tranche A Term Commitments, Tranche B Term Commitments or
Revolving Commitments, as the case may be, of the relevant Lenders.

          (b) Each payment (including each prepayment) by the Borrower on
account of principal of and interest on the Term Loans shall be made pro rata
according to the respective outstanding principal amounts of the Term Loans then
held by the Term Lenders (except as otherwise provided in Section 2.15(d)). The
amount of each principal prepayment of the Term Loans shall be applied to reduce
the then remaining installments of the Tranche A Term Loans, Tranche B Term
Loans and Incremental Term Loans, as the case may be, pro rata based upon the
then remaining principal amount thereof; provided that optional prepayments of
the Term Loans made pursuant to Section 2.8 may, at the Borrower's option, first
be applied to the next two originally scheduled installments of the Tranche A
Term Loans, Tranche B Term Loans and Incremental Term Loans, as the case may be,
until such installments have been paid in full. Amounts prepaid on account of
the Term Loans may not be reborrowed.

          (c) Each payment (including each prepayment) by the Borrower on
account of principal of and interest on the Revolving Loans shall be made pro
rata according to the respective outstanding principal amounts of the Revolving
Loans then held by the Revolving Lenders.

          (d) Notwithstanding anything to the contrary in this Agreement, with
respect to the amount of any mandatory prepayment of the Term Loans pursuant to
Section 2.9, that in any such case is allocated to Tranche B Term Loans or
Incremental Term Loans (such amounts, the "Tranche B Prepayment Amount" and the
"Incremental Prepayment Amount", respectively), at any time when Tranche A Term
Loans remain outstanding, the Borrower will, in lieu of applying such amount to
the prepayment of Tranche B Term Loans and Incremental Term Loans, respectively,
on the date specified in Section 2.9 for such prepayment, give the
Administrative Agent telephonic notice (promptly confirmed in writing)
requesting that the Administrative Agent prepare and provide to each Tranche B
Lender and Incremental Term Lender a notice (each, a "Prepayment Option Notice")
as described below. As promptly as practicable after receiving such notice from
the Borrower, the Administrative Agent will send to each Tranche B Lender and
Incremental Term Lender a Prepayment Option Notice, which shall be in the form
of Exhibit G, and shall include an offer by the Borrower to prepay on the date
(each a "Prepayment Date") that is 10 Business Days after the date of the
Prepayment Option Notice, the relevant Term Loans of such Lender by an amount
equal to the portion of the Prepayment Amount indicated in such Lender's
Prepayment Option Notice as being applicable to such Lender's Tranche B Term
Loans or Incremental Term Loans, as the case may be. On the Prepayment Date,
(i) the Borrower
<PAGE>

                                                                              36

shall pay to the relevant Tranche B Lenders and Incremental Term Lenders the
aggregate amount necessary to prepay that portion of the outstanding relevant
Term Loans in respect of which such Lenders have accepted prepayment as
described in the Prepayment Option Notice and (ii) the Borrower shall pay to the
Tranche A Lenders an amount equal to the portion of the Tranche B Prepayment
Amount and the Incremental Prepayment Amount not accepted by the relevant
Lenders, and such amount shall be applied to the prepayment of the Tranche A
Term Loans.

          (e) All payments (including prepayments) to be made by the Borrower
hereunder, whether on account of principal, interest, fees or otherwise, shall
be made without setoff or counterclaim and shall be made prior to 12:00 Noon,
New York City time, on the due date thereof to the Administrative Agent, for the
account of the Lenders, at the Funding Office, in Dollars and in immediately
available funds. The Administrative Agent shall distribute such payments to the
Lenders promptly upon receipt in like funds as received. If any payment
hereunder (other than payments on the Eurodollar Loans) becomes due and payable
on a day other than a Business Day, such payment shall be extended to the next
succeeding Business Day. If any payment on a Eurodollar Loan becomes due and
payable on a day other than a Business Day, the maturity thereof shall be
extended to the next succeeding Business Day unless the result of such extension
would be to extend such payment into another calendar month, in which event such
payment shall be made on the immediately preceding Business Day. In the case of
any extension of any payment of principal pursuant to the preceding two
sentences, interest thereon shall be payable at the then applicable rate during
such extension.

          (f) Unless the Administrative Agent shall have been notified in
writing by any Lender prior to a borrowing that such Lender will not make the
amount that would constitute its share of such borrowing available to the
Administrative Agent, the Administrative Agent may assume that such Lender is
making such amount available to the Administrative Agent, and the Administrative
Agent may, in reliance upon such assumption, make available to the Borrower a
corresponding amount. If such amount is not made available to the Administrative
Agent by the required time on the Borrowing Date therefor, such Lender shall pay
to the Administrative Agent, on demand, such amount with interest thereon at a
rate equal to the daily average Federal Funds Effective Rate for the period
until such Lender makes such amount immediately available to the Administrative
Agent. A certificate of the Administrative Agent submitted to any Lender with
respect to any amounts owing under this paragraph shall be conclusive in the
absence of manifest error. If such Lender's share of such borrowing is not made
available to the Administrative Agent by such Lender within three Business Days
of such Borrowing Date, the Administrative Agent shall also be entitled to
recover such amount with interest thereon at the rate per annum applicable to
ABR Loans under the relevant Facility, on demand, from the Borrower.

          (g) Unless the Administrative Agent shall have been notified in
writing by the Borrower prior to the date of any payment being made hereunder
that the Borrower will not make such payment to the Administrative Agent, the
Administrative Agent may assume that the Borrower is making such payment, and
the Administrative Agent may, but shall not be required to, in reliance upon
such assumption, make available to the Lenders their respective pro rata shares
of a corresponding amount. If such payment is not made to the Administrative
Agent by the Borrower within three Business Days of such required date, the
Administrative Agent shall be entitled to recover, on demand, from each Lender
to which any amount which was made available pursuant to the preceding sentence,
such amount with interest thereon at the rate per annum equal to the daily
average Federal Funds Effective Rate. Nothing herein shall be deemed to limit
the rights of the Administrative Agent or any Lender against the Borrower.
<PAGE>

                                                                              37

          2.16 Requirements of Law. (a) If the adoption of or any change in any
Requirement of Law or in the interpretation or application thereof or compliance
by any Lender with any request or directive (whether or not having the force of
law) from any central bank or other Governmental Authority made subsequent to
the date hereof:

          (i)   shall subject any Lender to any tax of any kind whatsoever with
respect to this Agreement, any Letter of Credit, any Application or any
Eurodollar Loan made by it, or change the basis of taxation of payments to such
Lender in respect thereof (except for Non-Excluded Taxes covered by Section 2.17
and changes in the rate of tax on the overall net income of such Lender);

          (ii)  shall impose, modify or hold applicable any reserve, special
deposit, compulsory loan or similar requirement against assets held by, deposits
or other liabilities in or for the account of, advances, loans or other
extensions of credit by, or any other acquisition of funds by, any office of
such Lender that is not otherwise included in the determination of the
Eurodollar Rate hereunder; or

          (iii) shall impose on such Lender any other condition;

and the result of any of the foregoing is to increase the cost to such Lender,
by an amount that such Lender deems to be material, of making, converting into,
continuing or maintaining Eurodollar Loans or issuing or participating in
Letters of Credit, or to reduce any amount receivable hereunder in respect
thereof, then, in any such case, the Borrower shall promptly pay such Lender,
upon its demand, any additional amounts necessary to compensate such Lender for
such increased cost or reduced amount receivable. If any Lender becomes entitled
to claim any additional amounts pursuant to this paragraph, it shall promptly
notify the Borrower (with a copy to the Administrative Agent) of the event by
reason of which it has become so entitled.

          (b) If any Lender shall have determined that the adoption of or any
change in any Requirement of Law regarding capital adequacy or in the
interpretation or application thereof or compliance by such Lender or any
corporation controlling such Lender with any request or directive regarding
capital adequacy (whether or not having the force of law) from any Governmental
Authority made subsequent to the date hereof shall have the effect of reducing
the rate of return on such Lender's or such corporation's capital as a
consequence of its obligations hereunder or under or in respect of any Letter of
Credit to a level below that which such Lender or such corporation could have
achieved but for such adoption, change or compliance (taking into consideration
such Lender's or such corporation's policies with respect to capital adequacy)
by an amount deemed by such Lender to be material, then from time to time, after
submission by such Lender to the Borrower (with a copy to the Administrative
Agent) of a written request therefor, the Borrower shall pay to such Lender such
additional amount or amounts as will compensate such Lender for such reduction;
provided that the Borrower shall not be required to compensate a Lender pursuant
to this paragraph for any amounts incurred more than six months prior to the
date that such Lender notifies the Borrower of such Lender's intention to claim
compensation therefor; and provided further that, if the circumstances giving
rise to such claim have a retroactive effect, then such six-month period shall
be extended to include the period of such retroactive effect.

          (c) A certificate, setting forth a reasonably detailed explanation as
to the reason for any additional amounts payable pursuant to this Section,
submitted by any Lender to the Borrower (with a
<PAGE>

                                                                              38

copy to the Administrative Agent) shall be conclusive in the absence of manifest
error. The obligations of the Borrower pursuant to this Section shall survive
the termination of this Agreement and the payment of the Loans and all other
amounts payable hereunder.

          2.17 Taxes. (a) All payments made by the Borrower under this Agreement
shall be made free and clear of, and without deduction or withholding for or on
account of, any present or future income, stamp or other taxes, levies, imposts,
duties, charges, fees, deductions or withholdings, now or hereafter imposed,
levied, collected, withheld or assessed by any Governmental Authority, excluding
net income taxes and franchise taxes (imposed in lieu of net income taxes)
imposed on the Administrative Agent or any Lender as a result of a present or
former connection between the Administrative Agent or such Lender and the
jurisdiction of the Governmental Authority imposing such tax or any political
subdivision or taxing authority thereof or therein (other than any such
connection arising solely from the Administrative Agent or such Lender having
executed, delivered or performed its obligations or received a payment under, or
enforced, this Agreement or any other Loan Document). If any such non-excluded
taxes, levies, imposts, duties, charges, fees, deductions or withholdings ("Non-
Excluded Taxes") or Other Taxes are required to be withheld from any amounts
payable to the Administrative Agent or any Lender hereunder, the amounts so
payable to the Administrative Agent or such Lender shall be increased to the
extent necessary to yield to the Administrative Agent or such Lender (after
payment of all Non-Excluded Taxes and Other Taxes) interest or any such other
amounts payable hereunder at the rates or in the amounts specified in this
Agreement, provided, however, that the Borrower shall not be required to
increase any such amounts payable to any Lender with respect to any Non-Excluded
Taxes (i) that are attributable to such Lender's failure to comply with the
requirements of paragraph (d) or (e) of this Section or (ii) that are United
States withholding taxes imposed on amounts payable to such Lender at the time
the Lender becomes a party to this Agreement (or designates a new lending
office), except to the extent that such Lender's assignor (if any) was entitled,
at the time of assignment, to receive additional amounts from the Borrower with
respect to such Non-Excluded Taxes pursuant to this paragraph.

          (b) In addition, the Borrower shall pay any Other Taxes to the
relevant Governmental Authority in accordance with applicable law.

          (c) Whenever any Non-Excluded Taxes or Other Taxes are payable by the
Borrower, as promptly as possible thereafter the Borrower shall send to the
Administrative Agent for its own account or for the account of the relevant
Lender, as the case may be, a certified copy of an original official receipt
received by the Borrower showing payment thereof. If the Borrower fails to pay
any Non-Excluded Taxes or Other Taxes when due to the appropriate taxing
authority or fails to remit to the Administrative Agent the required receipts or
other required documentary evidence, the Borrower shall indemnify the
Administrative Agent and the Lenders for any incremental taxes, interest or
penalties that may become payable by the Administrative Agent or any Lender as a
result of any such failure.

          (d) Each Lender (or Transferee) that is not a "U.S. Person" as defined
in Section 7701(a)(30) of the Code (a "Non-U.S. Lender") shall deliver to the
Borrower and the Administrative Agent (or, in the case of a Participant, to the
Lender from which the related participation shall have been purchased) two
copies of either U.S. Internal Revenue Service Form W-8BEN or Form W-8ECI, or,
in the case of a Non-U.S. Lender claiming exemption from U.S. federal
withholding tax under Section 871(h) or 881(c) of the Code with respect to
payments of "portfolio interest", a statement substantially in the form of
Exhibit H and a Form W-8BEN, or any subsequent versions thereof or successors
thereto, properly completed and duly executed by such Non-U.S. Lender claiming
complete exemption from, or a
<PAGE>

                                                                              39

reduced rate of, U.S. federal withholding tax on all payments by the Borrower
under this Agreement and the other Loan Documents. Such forms shall be delivered
by each Non-U.S. Lender on or before the date it becomes a party to this
Agreement or designates a new lending office (or, in the case of any
Participant, on or before the date such Participant purchases the related
participation). In addition, each Non-U.S. Lender shall deliver such forms
promptly upon the obsolescence or invalidity of any form previously delivered by
such Non-U.S. Lender. Each Non-U.S. Lender shall promptly notify the Borrower at
any time it determines that it is no longer in a position to provide any
previously delivered certificate to the Borrower (or any other form of
certification adopted by the U.S. taxing authorities for such purpose).
Notwithstanding any other provision of this paragraph, a Non-U.S. Lender shall
not be required to deliver any form pursuant to this paragraph that such Non-
U.S. Lender is not legally able to deliver.

          (e) If the Administrative Agent or any Lender receives a refund in
respect of any amounts paid by the Borrower pursuant to this Section 2.17, which
refund in the sole judgment of such Administrative Agent or such Lender is
allocable to such payment, it shall pay the amount of such refund to the
Borrower, net of all out-of-pocket expenses of the Administrative Agent or such
Lender, provided however, that the Borrower, upon the request of such Lender or
the Administrative Agent, agrees to repay the amount paid over to the Borrower
to the Administrative Agent or such Lender in the event such Administrative
Agent or the Lender is required to repay such refund. Nothing contained herein
shall interfere with the right of the Administrative Agent or any Lender to
arrange its tax affairs in whatever manner it deems fit nor oblige the
Administrative Agent or any Lender to apply for any refund or to disclose any
information relating to its affairs or any computations in respect thereof.

          (f) The agreements in this Section shall survive the termination of
this Agreement and the payment of the Loans and all other amounts payable
hereunder.

          2.18 Indemnity. The Borrower agrees to indemnify each Lender and to
hold each Lender harmless from any loss or expense that such Lender sustains or
incurs as a consequence of (a) default by the Borrower in making a borrowing of,
conversion into or continuation of Eurodollar Loans after the Borrower has given
a notice requesting the same in accordance with the provisions of this
Agreement, (b) default by the Borrower in making any prepayment of or conversion
from Eurodollar Loans after the Borrower has given a notice thereof in
accordance with the provisions of this Agreement or (c) the making of a
prepayment of Eurodollar Loans on a day that is not the last day of an Interest
Period with respect thereto. Such indemnification may include an amount equal to
the excess, if any, of (i) the amount of interest that would have accrued on the
amount so prepaid, or not so borrowed, converted or continued, for the period
from the date of such prepayment or of such failure to borrow, convert or
continue to the last day of such Interest Period (or, in the case of a failure
to borrow, convert or continue, the Interest Period that would have commenced on
the date of such failure) in each case at the applicable rate of interest for
such Loans provided for herein (excluding, however, the Applicable Margin
included therein, if any) over (ii) the amount of interest (as reasonably
determined by such Lender) that would have accrued to such Lender on such amount
by placing such amount on deposit for a comparable period with leading banks in
the interbank eurodollar market. A certificate as to any amounts payable
pursuant to this Section submitted to the Borrower by any Lender shall be
conclusive in the absence of manifest error. This covenant shall survive the
termination of this Agreement and the payment of the Loans and all other amounts
payable hereunder.
<PAGE>

                                                                              40

          2.19 Change of Lending Office. Each Lender agrees that, upon the
occurrence of any event giving rise to the operation of Section 2.16 or 2.17(a)
with respect to such Lender, it will, if requested by the Borrower, use
reasonable efforts (subject to overall policy considerations of such Lender) to
designate another lending office for any Loans affected by such event with the
object of avoiding the consequences of such event; provided, that such
designation is made on terms that, in the sole judgment of such Lender, cause
such Lender and its lending office(s) to suffer no economic, legal or regulatory
disadvantage, and provided, further, that nothing in this Section shall affect
or postpone any of the obligations of the Borrower or the rights of any Lender
pursuant to Section 2.16 or 2.17(a).

          2.20 Replacement of Lenders. The Borrower shall be permitted to
replace any Lender that (a) requests reimbursement for amounts owing pursuant to
Section 2.16 or 2.17(a) or (b) defaults in its obligation to make Loans
hereunder, with a replacement financial institution; provided that (i) such
replacement does not conflict with any Requirement of Law, (ii) no Event of
Default shall have occurred and be continuing at the time of such replacement,
(iii) prior to any such replacement, such Lender shall have taken no action
under Section 2.19 so as to eliminate the continued need for payment of amounts
owing pursuant to Section 2.16 or 2.17(a), (iv) the replacement financial
institution shall purchase, at par, all Loans and other amounts owing to such
replaced Lender on or prior to the date of replacement, (v) the Borrower shall
be liable to such replaced Lender under Section 2.18 if any Eurodollar Loan
owing to such replaced Lender shall be purchased other than on the last day of
the Interest Period relating thereto, (vi) the replacement financial
institution, if not already a Lender, shall be reasonably satisfactory to the
Administrative Agent, (vii) the replaced Lender shall be obligated to make such
replacement in accordance with the provisions of Section 10.6 (provided that the
Borrower shall be obligated to pay the registration and processing fee referred
to therein), (viii) until such time as such replacement shall be consummated,
the Borrower shall pay all additional amounts (if any) required pursuant to
Section 2.16 or 2.17(a), as the case may be, and (ix) any such replacement shall
not be deemed to be a waiver of any rights that the Borrower, the Administrative
Agent or any other Lender shall have against the replaced Lender.

                         SECTION 3. LETTERS OF CREDIT

          3.1 L/C Commitment. (a) Subject to the terms and conditions hereof,
each Issuing Lender, in reliance on the agreements of the other Revolving
Lenders set forth in Section 3.4(a), agrees to issue letters of credit ("Letters
of Credit") for the account of the Borrower on any Business Day during the
Revolving Commitment Period in such form as may be approved from time to time by
such Issuing Lender; provided that no Issuing Lender shall have an obligation to
issue any Letter of Credit if, after giving effect to such issuance, (i) the L/C
Obligations would exceed the L/C Commitment or (ii) the aggregate amount of the
Available Revolving Commitments would be less than zero. Each Letter of Credit
shall (i) be denominated in Dollars, (ii) have a face amount of at least
$100,000 (unless otherwise agreed by the relevant Issuing Lender) and (iii)
expire no later than the earlier of (x) the first anniversary of its date of
issuance and (y) the date that is five Business Days prior to the Revolving
Termination Date, provided that any Letter of Credit with a one-year term may
provide for the renewal thereof for additional one-year periods (which shall in
no event extend beyond the date referred to in clause (y) above).

          (b) No Issuing Lender shall at any time be obligated to issue any
Letter of Credit hereunder if such issuance would conflict with, or cause such
Issuing Lender or any L/C Participant to exceed any limits imposed by, any
applicable Requirement of Law.
<PAGE>

                                                                              41

          3.2 Procedure for Issuance of Letter of Credit. The Borrower may from
time to time request that any Issuing Lender issue a Letter of Credit by
delivering to such Issuing Lender at its address for notices specified herein an
Application therefor, completed to the satisfaction of such Issuing Lender, and
such other certificates, documents and other papers and information as such
Issuing Lender may request. Upon receipt of any Application, the relevant
Issuing Lender will process such Application and the certificates, documents and
other papers and information delivered to it in connection therewith in
accordance with its customary procedures and shall promptly issue the Letter of
Credit requested thereby (but in no event shall such Issuing Lender be required
to issue any Letter of Credit earlier than three Business Days after its receipt
of the Application therefor and all such other certificates, documents and other
papers and information relating thereto) by issuing the original of such Letter
of Credit to the beneficiary thereof or as otherwise may be agreed to by such
Issuing Lender and the Borrower. The relevant Issuing Lender shall furnish a
copy of such Letter of Credit to the Borrower promptly following the issuance
thereof. The relevant Issuing Lender shall promptly furnish to the
Administrative Agent, which shall in turn promptly furnish to the Lenders,
notice of the issuance of each Letter of Credit (including the amount thereof).

          3.3 Fees and Other Charges. (a) The Borrower will pay a fee on all
outstanding Letters of Credit at a per annum rate equal to the Applicable Margin
then in effect with respect to Eurodollar Loans under the Revolving Facility,
shared ratably among the Revolving Lenders and payable quarterly in arrears on
each L/C Fee Payment Date after the issuance date. In addition, the Borrower
shall pay to the relevant Issuing Lender for its own account a fronting fee of
0.25% per annum on the face amount of each Letter of Credit, payable quarterly
in arrears on each L/C Fee Payment Date after the Issuance Date.

          (b) In addition to the foregoing fees, the Borrower shall pay or
reimburse the relevant Issuing Lender for such normal and customary costs and
expenses as are incurred or charged by such Issuing Lender in issuing,
negotiating, effecting payment under, amending or otherwise administering any
Letter of Credit.

          3.4 L/C Participations. (a) Each Issuing Lender irrevocably agrees to
grant and hereby grants to each L/C Participant, and, to induce the Issuing
Lenders to issue Letters of Credit hereunder, each L/C Participant irrevocably
agrees to accept and purchase and hereby accepts and purchases from each Issuing
Lender, on the terms and conditions set forth below, for such L/C Participant's
own account and risk an undivided interest equal to such L/C Participant's
Revolving Percentage in each Issuing Lender's obligations and rights under and
in respect of each Letter of Credit issued by it hereunder and the amount of
each draft paid by such Issuing Lender thereunder. Each L/C Participant
unconditionally and irrevocably agrees with each Issuing Lender that, if a draft
is paid under any Letter of Credit for which such Issuing Lender is not
reimbursed in full by the Borrower in accordance with the terms of this
Agreement, such L/C Participant shall pay to such Issuing Lender upon demand at
such Issuing Lender's address for notices specified herein an amount equal to
such L/C Participant's Revolving Percentage of the amount of such draft, or any
part thereof, that is not so reimbursed.

          (b) If any amount required to be paid by any L/C Participant to any
Issuing Lender pursuant to Section 3.4(a) in respect of any unreimbursed portion
of any payment made by such Issuing Lender under any Letter of Credit is paid to
such Issuing Lender within three Business Days after the date such payment is
due, such L/C Participant shall pay to such Issuing Lender on demand an amount
equal to the product of (i) such amount, times (ii) the daily average Federal
Funds Effective Rate during
<PAGE>

                                                                              42

the period from and including the date such payment is required to the date on
which such payment is immediately available to such Issuing Lender, times (iii)
a fraction the numerator of which is the number of days that elapse during such
period and the denominator of which is 360. If any such amount required to be
paid by any L/C Participant pursuant to Section 3.4(a) is not made available to
the relevant Issuing Lender by such L/C Participant within three Business Days
after the date such payment is due, such Issuing Lender shall be entitled to
recover from such L/C Participant, on demand, such amount with interest thereon
calculated from such due date at the rate per annum applicable to ABR Loans
under the Revolving Facility. A certificate of the relevant Issuing Lender
submitted to any L/C Participant with respect to any amounts owing under this
Section shall be conclusive in the absence of manifest error.

          (c) Whenever, at any time after the relevant Issuing Lender has made
payment under any Letter of Credit and has received from any L/C Participant its
pro rata share of such payment in accordance with Section 3.4(a), such Issuing
Lender receives any payment related to such Letter of Credit (whether directly
from the Borrower or otherwise, including proceeds of collateral applied thereto
by such Issuing Lender), or any payment of interest on account thereof, such
Issuing Lender will distribute to such L/C Participant its pro rata share
thereof; provided, however, that in the event that any such payment received by
such Issuing Lender shall be required to be returned by such Issuing Lender,
such L/C Participant shall return to such Issuing Lender the portion thereof
previously distributed by such Issuing Lender to it.

          3.5 Reimbursement Obligation of the Borrower. The Borrower agrees to
reimburse the relevant Issuing Lender on each date next succeeding the date on
which such Issuing Lender notifies the Borrower of the date and amount of a
draft presented under any Letter of Credit and paid by such Issuing Lender for
the amount of (a) such draft so paid and (b) any taxes, fees, charges or other
costs or expenses incurred by such Issuing Lender in connection with such
payment. Each such payment shall be made to the relevant Issuing Lender at its
address for notices specified herein in lawful money of the United States and in
immediately available funds. Interest shall be payable on any and all amounts
remaining unpaid by the Borrower under this Section from the date on which the
relevant draft is paid or the relevant costs or expenses are incurred, as the
case may be, until payment in full at the rate set forth in (i) until the second
Business Day following such date, Section 2.12(b) and (ii) thereafter, Section
2.12(c).

          3.6 Obligations Absolute. The Borrower's obligations under this
Section 3 shall be absolute and unconditional under any and all circumstances
and irrespective of any setoff, counterclaim or defense to payment that the
Borrower may have or have had against any Issuing Lender, any beneficiary of a
Letter of Credit or any other Person. The Borrower also agrees with each Issuing
Lender that no Issuing Lender shall be responsible for, and the Borrower's
Reimbursement Obligations under Section 3.5 shall not be affected by, among
other things, the validity or genuineness of documents or of any endorsements
thereon, even though such documents shall in fact prove to be invalid,
fraudulent or forged, or any dispute between or among the Borrower and any
beneficiary of any Letter of Credit or any other party to which such Letter of
Credit may be transferred or any claims whatsoever of the Borrower against any
beneficiary of such Letter of Credit or any such transferee. No Issuing Lender
shall be liable for any error, omission, interruption or delay in transmission,
dispatch or delivery of any message or advice, however transmitted, in
connection with any Letter of Credit, except for errors or omissions found by a
final and nonappealable decision of a court of competent jurisdiction to have
resulted from the gross negligence or willful misconduct of the relevant Issuing
Lender. The Borrower agrees that any action taken or omitted by any Issuing
Lender under or in connection with any Letter of Credit or the related
<PAGE>

                                                                              43

drafts or documents, if done in the absence of gross negligence or willful
misconduct and in accordance with the standards of care specified in the Uniform
Commercial Code of the State of New York, shall be binding on the Borrower and
shall not result in any liability of any Issuing Lender to the Borrower.

          3.7 Letter of Credit Payments. If any draft shall be presented for
payment under any Letter of Credit, the relevant Issuing Lender shall promptly
notify the Borrower of the date and amount thereof. The responsibility of each
Issuing Lender to the Borrower in connection with any draft presented for
payment under any Letter of Credit shall, in addition to any payment obligation
expressly provided for in such Letter of Credit, be limited to determining that
the documents (including each draft) delivered under such Letter of Credit in
connection with such presentment are substantially in conformity with such
Letter of Credit.

          3.8 Applications. To the extent that any provision of any Application
related to any Letter of Credit is inconsistent with the provisions of this
Section 3, the provisions of this Section 3 shall apply.

                   SECTION 4. REPRESENTATIONS AND WARRANTIES

          To induce the Administrative Agent and the Lenders to enter into this
Agreement and to make the Loans and issue or participate in the Letters of
Credit, Holdings and the Borrower hereby jointly and severally represent and
warrant to the Administrative Agent and each Lender that:

          4.1 Financial Condition. (a) Each of (i) the unaudited pro forma
consolidated balance sheet of the Borrower and its Subsidiaries as at September
30, 1999 (including the notes thereto) and (ii) the unaudited pro forma
consolidated balance sheet of the Loan Parties (as a group) as at September 30,
1999 (including the notes thereto) (the "Pro Forma Balance Sheets"), copies of
which have heretofore been furnished to each Lender, has been prepared giving
effect (as if such events had occurred on such date) to (i) the Loans to be made
on the Closing Date and the use of proceeds thereof and (ii) the payment of fees
and expenses in connection with the foregoing. Each of the Pro Forma Balance
Sheets has been prepared based on the best information available to the Borrower
as of the date of delivery thereof, and presents fairly on a pro forma basis the
estimated financial position of (i) the Borrower and its Subsidiaries or (ii)
the Loan Parties (as a group), as applicable, in each case as at September 30,
1999, assuming that the events specified in the preceding sentence had actually
occurred at such date.

          (b) The audited consolidated financial statements of Holdings and its
Subsidiaries (including, for purposes of this Section 4.1(b), the Unrestricted
Subsidiaries) as at December 31, 1998, and the related consolidated statements
of income and of cash flows for the fiscal year ended on such date, reported on
by and accompanied by an unqualified report from KPMG, LLP, present fairly the
consolidated financial condition of Holdings and its Subsidiaries as at such
date, and the consolidated results of its operations and its consolidated cash
flows for the fiscal year then ended. The unaudited consolidated financial
statements of Holdings and its Subsidiaries as at September 30, 1999, and the
related unaudited consolidated statements of income and cash flows for the nine-
month period ended on such date, present fairly the consolidated financial
condition of Holdings and its Subsidiaries as at such date, and the consolidated
results of its operations and its consolidated cash flows for the nine-month
period then ended (subject to normal year-end audit adjustments). All such
financial statements, including the related schedules and notes thereto, have
been prepared in accordance with GAAP applied consistently throughout the
periods involved (except as approved by the aforementioned firm of
<PAGE>

                                                                              44

accountants and disclosed therein). Holdings and its Subsidiaries do not have
any material Guarantee Obligations, contingent liabilities and liabilities for
taxes, or any long-term leases or unusual forward or long-term commitments,
including any interest rate or foreign currency swap or exchange transaction or
other obligation in respect of derivatives, that are not reflected in the most
recent financial statements referred to in this paragraph. During the period
from December 31, 1998 to and including the date hereof there has been no
Disposition by Holdings or any of its Subsidiaries of any material part of its
business or property.

          (c) The audited consolidated financial statements of the Loan Parties
(as a group) as at December 31, 1998, and the related consolidated statements of
income and of cash flows for the fiscal year ended on such date, reported on by
and accompanied by an unqualified report from KPMG, LLP, present fairly the
consolidated financial condition of the Loan Parties (as a group) as at such
date, and the consolidated results of its operations and its consolidated cash
flows for the fiscal year then ended. The unaudited consolidated financial
statements of the Loan Parties (as a group) as at September 30, 1999, and the
related unaudited consolidated statements of income and cash flows for the nine-
month period ended on such date, present fairly the consolidated financial
condition of the Loan Parties (as a group) as at such date, and the consolidated
results of its operations and its consolidated cash flows for the nine-month
period then ended (subject to normal year-end audit adjustments). All such
financial statements, including the related schedules and notes thereto, have
been prepared in accordance with GAAP applied consistently throughout the
periods involved (except as approved by the aforementioned firm of accountants
and disclosed therein). The Loan Parties do not have any material Guarantee
Obligations, contingent liabilities and liabilities for taxes, or any long-term
leases or unusual forward or long-term commitments, including any interest rate
or foreign currency swap or exchange transaction or other obligation in respect
of derivatives, that are not reflected in the most recent financial statements
referred to in this paragraph. During the period from December 31, 1998 to and
including the date hereof there has been no Disposition by any of the Loan
Parties of any material part of its business or property.

          4.2 No Change. Since September 30, 1999, there has been no development
or event that has had or could reasonably be expected to have a Material Adverse
Effect.

          4.3 Corporate Existence; Compliance with Law. Each of Holdings, the
Borrower and their respective Subsidiaries (a) is duly organized, validly
existing and in good standing under the laws of the jurisdiction of its
organization, (b) has the corporate power and authority, and the legal right, to
own and operate its property, to lease the property it operates as lessee and to
conduct the business in which it is currently engaged, (c) is duly qualified as
a foreign corporation and in good standing under the laws of each jurisdiction
where its ownership, lease or operation of property or the conduct of its
business requires such qualification except to the extent that the failure to be
so qualified and in good standing could not, in the aggregate, reasonably be
expected to have a Material Adverse Effect and (d) is in compliance with all
Requirements of Law except to the extent that the failure to comply therewith
could not, in the aggregate, reasonably be expected to have a Material Adverse
Effect.

          4.4 Corporate Power; Authorization; Enforceable Obligations. Each Loan
Party has the corporate power and authority, and the legal right, to make,
deliver and perform the Loan Documents to which it is a party and, in the case
of the Borrower, to obtain extensions of credit hereunder. Each Loan Party has
taken all necessary corporate action to authorize the execution, delivery and
performance of the Loan Documents to which it is a party and, in the case of the
Borrower, to authorize the extensions of credit on the terms and conditions of
this Agreement. No material consent or authorization of, filing with,
<PAGE>

                                                                              45

notice to or other act by or in respect of, any Governmental Authority or any
other Person is required in connection with the extensions of credit hereunder
or with the execution, delivery, performance, validity or enforceability of this
Agreement or any of the Loan Documents, except (i) consents, authorizations,
filings and notices described in Schedule 4.4, which consents, authorizations,
filings and notices have been obtained or made and are in full force and effect
and (ii) the filings referred to in Section 4.19. Each Loan Document has been
duly executed and delivered on behalf of each Loan Party party thereto. This
Agreement constitutes, and each other Loan Document upon execution will
constitute, a legal, valid and binding obligation of each Loan Party party
thereto, enforceable against each such Loan Party in accordance with its terms,
except as enforceability may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting the enforcement of
creditors' rights generally and by general equitable principles (whether
enforcement is sought by proceedings in equity or at law).

          4.5 No Legal Bar. The execution, delivery and performance of this
Agreement and the other Loan Documents, the issuance of Letters of Credit, the
borrowings hereunder and the use of the proceeds thereof will not violate any
Requirement of Law or any Contractual Obligation of Holdings, the Borrower or
any of their respective Subsidiaries and will not result in, or require, the
creation or imposition of any Lien on any of their respective properties or
revenues pursuant to any Requirement of Law or any such Contractual Obligation
(other than the Liens created by the Guarantee and Collateral Agreement).

          4.6 Litigation. No litigation, investigation or proceeding of or
before any arbitrator or Governmental Authority is pending or, to the knowledge
of Holdings or the Borrower, threatened by or against Holdings, the Borrower or
any of their respective Subsidiaries or against any of their respective
properties or revenues (a) with respect to any of the Loan Documents or any of
the transactions contemplated hereby or thereby, or (b) that could reasonably be
expected to have a Material Adverse Effect.

          4.7 No Default. Neither Holdings, the Borrower nor any of their
respective Subsidiaries is in default under or with respect to any of its
Contractual Obligations in any respect that could reasonably be expected to have
a Material Adverse Effect. No Default or Event of Default has occurred and is
continuing.

          4.8 Ownership of Property; Liens. Each of Holdings, the Borrower and
their respective Subsidiaries has title in fee simple to, or a valid leasehold
interest in, all its real property, and good title to, or a valid leasehold
interest in, all its other property, and none of such property is subject to any
Lien except as permitted by Section 7.3 and except for any immaterial defects in
title.

          4.9 Intellectual Property. Holdings, the Borrower and each of their
respective Subsidiaries owns, or is licensed to use, all Intellectual Property
necessary for the conduct of its business as currently conducted. No material
claim has been asserted and is pending by any Person challenging or questioning
the use of any Intellectual Property or the validity or effectiveness of any
Intellectual Property, nor does Holdings or the Borrower know of any valid basis
for any such claim. The use of Intellectual Property by Holdings, the Borrower
and their respective Subsidiaries does not infringe on the rights of any Person
in any material respect.

          4.10 Taxes. Each of Holdings, the Borrower and each of their
respective Subsidiaries has filed or caused to be filed all Federal, state and
other material tax returns that are required to be filed and has paid all taxes
shown to be due and payable on said returns or on any assessments made against
it
<PAGE>

                                                                              46

or any of its property and all other taxes, fees or other charges imposed on it
or any of its property by any Governmental Authority (other than any the amount
or validity of which are currently being contested in good faith by appropriate
proceedings and with respect to which reserves in conformity with GAAP have been
provided on the books of Holdings, the Borrower or their respective
Subsidiaries, as the case may be); no tax Lien has been filed, and, to the
knowledge of Holdings and the Borrower, no claim is being asserted, with respect
to any such tax, fee or other charge.

          4.11 Federal Regulations. No part of the proceeds of any Loans, and no
other extensions of credit hereunder, will be used for "buying" or "carrying"
any "margin stock" within the respective meanings of each of the quoted terms
under Regulation U as now and from time to time hereafter in effect or for any
purpose that violates the provisions of the Regulations of the Board. If
requested by any Lender or the Administrative Agent, the Borrower will furnish
to the Administrative Agent and each Lender a statement to the foregoing effect
in conformity with the requirements of FR Form G-3 or FR Form U-1, as
applicable, referred to in Regulation U.

          4.12 Labor Matters. Except as, in the aggregate, could not reasonably
be expected to have a Material Adverse Effect: (a) there are no strikes or other
labor disputes against Holdings, the Borrower or any of their respective
Subsidiaries pending or, to the knowledge of Holdings or the Borrower,
threatened; (b) hours worked by and payment made to employees of Holdings, the
Borrower and their respective Subsidiaries have not been in violation of the
Fair Labor Standards Act or any other applicable Requirement of Law dealing with
such matters; and (c) all payments due from Holdings, the Borrower or any of
their respective Subsidiaries on account of employee health and welfare
insurance have been paid or accrued as a liability on the books of Holdings, the
Borrower or the relevant Subsidiary.

          4.13 ERISA. Neither a Reportable Event nor an "accumulated funding
deficiency" (within the meaning of Section 412 of the Code or Section 302 of
ERISA) has occurred during the five-year period prior to the date on which this
representation is made or deemed made with respect to any Plan, and each Plan
has complied in all material respects with the applicable provisions of ERISA
and the Code. No termination of a Single Employer Plan (other than a standard
termination pursuant to Section 4041(b) of ERISA) has occurred, and no Lien in
favor of the PBGC or a Plan has arisen, during such five-year period. The
present value of all accrued benefits under each Single Employer Plan (based on
those assumptions used to fund such Plans) did not, as of the last annual
valuation date prior to the date on which this representation is made or deemed
made, exceed the value of the assets of such Plan allocable to such accrued
benefits by an amount that could reasonably be expected to have a Material
Adverse Effect. Neither the Borrower nor any Commonly Controlled Entity has had
a complete or partial withdrawal from any Multiemployer Plan that has resulted
or could reasonably be expected to result in a material liability under ERISA,
and neither the Borrower nor any Commonly Controlled Entity would become subject
to any material liability under ERISA if the Borrower or any such Commonly
Controlled Entity were to withdraw completely from all Multiemployer Plans as of
the valuation date most closely preceding the date on which this representation
is made or deemed made. No such Multiemployer Plan is in Reorganization or
Insolvent.

          4.14 Investment Company Act; Other Regulations. No Loan Party is an
"investment company", or a company "controlled" by an "investment company",
within the meaning of the Investment Company Act of 1940, as amended. No Loan
Party is subject to regulation under any Requirement of Law (other than
Regulation X of the Board) that limits its ability to incur Indebtedness.
<PAGE>

                                                                              47

          4.15 Subsidiaries. Except as disclosed to the Administrative Agent by
the Borrower in writing from time to time after the Closing Date, (a) Schedule
4.15 sets forth the name and jurisdiction of incorporation of each Subsidiary
and, as to each such Subsidiary, the percentage of each class of Capital Stock
owned by any Loan Party and (b) there are no outstanding subscriptions, options,
warrants, calls, rights or other agreements or commitments (other than stock
options granted to employees or directors and directors' qualifying shares) of
any nature relating to any Capital Stock of the Borrower or any Subsidiary,
except (i) as created by the Loan Documents, (ii) for the call right described
in Section 7.5(e) and (iii) as created by agreements governing Investments made
pursuant to Section 7.7(i), (j) or (l) (and which apply only to Capital Stock of
the Subsidiary in which the relevant Investment is made).

          4.16 Use of Proceeds. The proceeds of the Loans and the Letters of
Credit shall be used for general corporate purposes.

          4.17 Environmental Matters. Except as, in the aggregate, could not
reasonably be expected to have a Material Adverse Effect:

          (a) the facilities and properties owned, leased or operated by
Holdings, the Borrower or any of their respective Subsidiaries (the
"Properties") do not contain any Materials of Environmental Concern in amounts
or concentrations that constitute a violation of, or could reasonably be
expected to result in liability of Holdings, the Borrower or any of their
respective Subsidiaries under applicable Environmental Law;

          (b) neither Holdings, the Borrower nor any of their respective
Subsidiaries has received written notice of any actual or alleged violation,
liability or potential liability regarding compliance with Environmental Laws
with regard to any of the Properties or the business operated by Holdings, the
Borrower or any of their respective Subsidiaries (the "Business"), nor does
Holdings or the Borrower have knowledge or reason to believe that any such
notice will be received or is being threatened;

          (c) neither Holdings, the Borrower nor any of their respective
Subsidiaries has transported or disposed of Materials of Environmental Concern
from the Properties in violation of, or in a manner or to a location that could
reasonably be expected to result in liability of Holdings, the Borrower or any
of their respective Subsidiaries under, applicable Environmental Law;

          (d) no judicial proceeding or governmental or administrative action is
pending or, to the knowledge of Holdings and the Borrower, threatened, under
applicable Environmental Law against Holdings, the Borrower or any of their
respective Subsidiaries with respect to the Properties or the Business, nor are
there any consent decrees or other decrees, consent orders, administrative
orders or other orders outstanding under applicable Environmental Law with
respect to the Properties or the Business; and

          (e) the Properties and all operations at the Properties are in
compliance with all applicable Environmental Laws.

          4.18 Accuracy of Information, etc. No statement or information
contained in this Agreement, any other Loan Document, the Confidential
Information Memorandum or any other document, certificate or statement furnished
by or on behalf of any Loan Party to the Administrative
<PAGE>

                                                                              48

Agent or the Lenders, or any of them, for use in connection with the
transactions contemplated by this Agreement or the other Loan Documents,
contained as of the date such statement, information, document or certificate
was so furnished (or, in the case of the Confidential Information Memorandum, as
of the date of this Agreement), any untrue statement of a material fact or
omitted to state a material fact necessary to make the statements contained
herein or therein not misleading. The projections and pro forma financial
information contained in the materials referenced above are based upon good
faith estimates and assumptions believed by management of the Borrower to be
reasonable at the time made, it being recognized by the Lenders that such
financial information as it relates to future events is not to be viewed as fact
and that actual results during the period or periods covered by such financial
information may differ from the projected results set forth therein by a
material amount.

          4.19 Security Interests. The Guarantee and Collateral Agreement is
effective to create in favor of the Administrative Agent, for the benefit of the
Lenders, a legal, valid and enforceable security interest in the Collateral
described therein and proceeds thereof. In the case of the Pledged Stock
described in the Guarantee and Collateral Agreement, when stock certificates
representing such Pledged Stock are delivered to the Administrative Agent, and
in the case of the other Collateral described in the Guarantee and Collateral
Agreement, when financing statements and other filings specified on Schedule
4.19 in appropriate form are filed in the offices specified on Schedule 4.19,
the Guarantee and Collateral Agreement shall constitute a fully perfected Lien
on, and security interest in, all right, title and interest of the Loan Parties
in such Collateral and the proceeds thereof for which the filing of a Uniform
Commercial Code financing statement is specified as the manner of perfection, as
security for the Obligations (as defined in the Guarantee and Collateral
Agreement), in each case prior and superior in right to any other Person
(except, in the case of Collateral other than Pledged Stock, Liens permitted by
Section 7.3).

          4.20 Solvency. Each Loan Party is, and after giving effect to the
incurrence of all Indebtedness and obligations being incurred in connection
herewith will be and will continue to be, Solvent.

          4.21 Year 2000 Matters. Except for disruptions which, in the
aggregate, could not reasonably be expected to have a Material Adverse Effect,
the year 2000 date change has not resulted in disruption of Holdings', the
Borrower's and their respective Subsidiaries' computer hardware, software,
databases, systems and other equipment containing embedded microchips (including
systems and equipment supplied by others or with which Holdings', the Borrower's
or their respective Subsidiaries' systems interface), or to Holdings', the
Borrower's or their respective Subsidiaries' operations or business systems, or
to the best of Holdings', the Borrower's and their respective Subsidiaries'
knowledge, to the operations or business systems of the Borrower's major
vendors, customers, suppliers and counterparties. Neither Holdings nor the
Borrower has any reason to believe that liabilities and expenditures related to
the year 2000 date-change (including, without limitation, costs caused by
reprogramming errors, the failure of others' systems or equipment, and the
potential liability, if any, of Holdings, the Borrower or their respective
Subsidiaries for year 2000 related costs incurred or disruption experienced by
others) will result in a Default, Event of Default or a Material Adverse Effect.
<PAGE>

                                                                              49

SECTION 5. CONDITIONS PRECEDENT
          5.1 Conditions to Initial Extension of Credit. The agreement of each
Lender to make the initial extension of credit requested to be made by it is
subject to the satisfaction, prior to or concurrently with the making of such
extension of credit on the Closing Date, of the following conditions precedent:

          (a) Credit Agreement; Guarantee and Collateral Agreement. The
Administrative Agent shall have received (i) this Agreement, executed and
delivered by the Agents, Holdings, the Borrower and each Person listed on
Schedule 1.1, (ii) the Guarantee and Collateral Agreement, executed and
delivered by Holdings, the Borrower, each Subsidiary Guarantor and any Specified
Non-Wholly Owned Subsidiary and (iii) an Acknowledgement and Consent in the form
attached to the Guarantee and Collateral Agreement, executed and delivered by
each Issuer (as defined therein), if any, that is not a Loan Party.

          In the event that this Agreement has not been duly executed and
delivered by each Person listed on Schedule 1.1 on the date scheduled to be the
Closing Date, the condition referred to in clause (i) above shall nevertheless
be deemed satisfied if on such date the Borrower and the Administrative Agent
shall have designated one or more Persons (the "Designated Lenders") to assume,
in the aggregate, all of the Commitments that would have been held by the
Persons listed on Schedule 1.1 (the "Non-Executing Persons") which have not so
executed and delivered this Agreement (subject to each such Designated Lender's
consent and its execution and delivery of this Agreement). Schedule 1.1 shall
automatically be deemed to be amended to reflect the respective Commitments of
the Designated Lenders and the omission of the Non-Executing Persons as Lenders
hereunder.

<PAGE>

                                                                              50


          (b) Cash at Holdings, etc.

              (i)   The Administrative Agent shall have received satisfactory
          evidence that the amount of cash held by Holdings on the Closing Date,
          when added to the amount of cash contributed by Holdings to the
          Borrower or any of the Borrower's Subsidiaries during the period from
          January 1, 2000 through the Closing Date, shall equal at least
          $425,000,000; and

              (ii)  (A) The Administrative Agent shall have received a
          satisfactory "pay-off" letter from KCCI, as administrative agent under
          the KCCI Credit Agreement, stating, among other things, that upon the
          payment in full of all amounts owing under the KCCI Credit Agreement,
          the KCCI Credit Agreement shall terminate and all liens and other
          security interests granted thereunder shall terminate and be of no
          further force or effect and (B) the Administrative Agent shall have
          received a copy of a funds flow memorandum evidencing the payment in
          full to KCCI, as administrative agent under the KCCI Credit Agreement,
          of all amounts owing thereunder.

          (c) Pro Forma Balance Sheet; Financial Statements; Projections.
(i) The Lenders shall have received the Pro Forma Balance Sheets and the other
financial statements referred to in Section 4.1.

          (ii) The Lenders shall have received satisfactory Projections through
the 2008 fiscal year of the Borrower.
<PAGE>

                                                                              51

     (d) Approvals. All material governmental and third party approvals
(including, without limitation, any approval in connection with the pledge of
Capital Stock of the GTE JV) necessary in connection with the transactions
contemplated hereby shall have been obtained and be in full force and effect.

     (e) Lien Searches. The Administrative Agent shall have received the results
of a recent Uniform Commercial Code lien search from the Secretary of State or
other appropriate state office for those states in which are located towers or
other income producing property of the Borrower or any of its Subsidiaries that
have generated on a pro forma basis in the aggregate at least 50% of the gross
revenues of the Borrower and its Subsidiaries for the twelve month period most
recently ended prior to the Closing Date, and such search shall reveal no liens
on any of the assets of the Borrower or its Subsidiaries except for liens
permitted by Section 7.3 or discharged on or prior to the Closing Date pursuant
to documentation satisfactory to the Administrative Agent.

     (f) Fees. The Lenders and the Agents shall have received all fees required
to be paid, and all expenses for which invoices have been presented (including
the reasonable fees and expenses of legal counsel), on or before the Closing
Date. All such amounts will be paid with proceeds of Loans made on the Closing
Date and will be reflected in the funding instructions given by the Borrower to
the Administrative Agent on or before the Closing Date.

     (g) Closing Certificate. The Administrative Agent shall have received a
certificate of each Loan Party, dated the Closing Date, substantially in the
form of Exhibit C, with appropriate insertions and attachments.

     (h) Legal Opinions. The Administrative Agent shall have received the
executed legal opinion of Cravath, Swaine & Moore, counsel to Holdings, the
Borrower and its Subsidiaries, substantially in the form of Exhibit F. Such
legal opinion shall cover such other matters incident to the transactions
contemplated by this Agreement as the Administrative Agent may reasonably
require.

     (i) Pledged Stock; Stock Powers; Pledged Notes. The Administrative Agent
shall have received (i) if certificated, the certificates representing the
shares of Capital Stock pledged pursuant to the Guarantee and Collateral
Agreement, together with an undated stock power for each such certificate
executed in blank by a duly authorized officer of the pledgor thereof and
(ii) each promissory note (if any) pledged to the Administrative Agent pursuant
to the Guarantee and Collateral Agreement endorsed (without recourse) in blank
(or accompanied by an executed transfer form in blank) by the pledgor thereof.

     (j) Filings, Registrations and Recordings. Each document (including any
Uniform Commercial Code financing statement) required by the Security Documents
or under law or reasonably requested by the Administrative Agent to be filed,
registered or recorded in order to create in favor of the Administrative Agent,
for the benefit of the Lenders, a perfected Lien on the Collateral described
therein, prior and superior in right to any other Person (other than with
respect to Liens expressly permitted by Section 7.3), shall be in proper form
for filing, registration or recordation.
<PAGE>

                                                                              52

     (k) Insurance. The Administrative Agent shall have received insurance
certificates satisfying the requirements of Section 5.2 of the Guarantee and
Collateral Agreement.

     5.2 Conditions to Each Extension of Credit. The agreement of each
Lender to make any extension of credit requested to be made by it on any date
(including its initial extension of credit) is subject to the satisfaction of
the following conditions precedent:

     (a) Representations and Warranties. Each of the representations and
warranties made by any Loan Party in or pursuant to the Loan Documents shall be
true and correct in all material respects on and as of such date as if made on
and as of such date.

     (b) No Default. No Default or Event of Default shall have occurred and
be continuing on such date or after giving effect to the extensions of credit
requested to be made on such date.

     (c) Other Documents. In the case of any extension of credit made on an
Increased Facility Closing Date, the Administrative Agent shall have received
such documents and information as it may reasonably request.

Each borrowing by and issuance of a Letter of Credit on behalf of the Borrower
hereunder shall constitute a representation and warranty by the Borrower as of
the date of such extension of credit that the conditions contained in Sections
5.2(a) and (b) have been satisfied.

                       SECTION 6. AFFIRMATIVE COVENANTS

          Holdings and the Borrower hereby jointly and severally agree that, so
long as the Commitments remain in effect, any Letter of Credit remains
outstanding or any Loan or other amount is owing to any Lender or any Agent
hereunder, each of Holdings and the Borrower shall, and shall cause each of
their respective Subsidiaries to:

          6.1 Financial Statements. Furnish to the Administrative Agent:

          (a)(i) as soon as available, but in any event within 95 days after the
end of each fiscal year of Holdings, a copy of the audited consolidated balance
sheet of Holdings and its consolidated Subsidiaries (including, for the purposes
of this Section 6.1(a)(i), the Unrestricted Subsidiaries) as at the end of such
year and the related audited consolidated statements of income and of cash flows
for such year, setting forth in each case in comparative form the figures for
the previous year, reported on without a "going concern" or like qualification
or exception, or qualification arising out of the scope of the audit, by KPMG,
LLP or other independent certified public accountants of nationally recognized
standing;

          (ii) as soon as available, but in any event within 95 days after the
end of each fiscal year of the Borrower, a copy of the audited consolidated
balance sheet of the Borrower and its consolidated Subsidiaries as at the end of
such year and the related audited consolidated statements of income and of cash
flows for such year, setting forth in each case in comparative form the figures
for the previous year, reported on without a "going concern" or like
qualification or exception, or qualification arising out of the scope of the
audit, by KPMG, LLP or other independent certified public accountants of
nationally recognized standing;
<PAGE>

                                                                              53

          (b)(i) as soon as available, but in any event not later than 50 days
after the end of each of the first three quarterly periods of each fiscal year
of Holdings, the unaudited consolidated balance sheet of Holdings and its
consolidated Subsidiaries (including, for the purposes of this Section
6.1(b)(i), the Unrestricted Subsidiaries) as at the end of such quarter and the
related unaudited consolidated statements of income and of cash flows for such
quarter and the portion of the fiscal year through the end of such quarter,
setting forth in each case in comparative form the figures for the previous
year, certified by a Responsible Officer as being fairly stated in all material
respects (subject to normal year-end audit adjustments);

          (ii) as soon as available, but in any event not later than 50 days
after the end of each of the first three quarterly periods of each fiscal year
of the Borrower, the unaudited consolidated balance sheet of the Borrower and
its consolidated Subsidiaries as at the end of such quarter and the related
unaudited consolidated statements of income and of cash flows for such quarter
and the portion of the fiscal year through the end of such quarter, setting
forth in each case in comparative form the figures for the previous year,
certified by a Responsible Officer as being fairly stated in all material
respects (subject to normal year-end audit adjustments).

All such financial statements, together with the notes thereto, shall fairly
present in all material respects the financial condition of the relevant
entities and shall be prepared in accordance with GAAP applied consistently
throughout the periods reflected therein and with prior periods (except as
approved by such accountants or officer, as the case may be, and disclosed
therein).

          Any financial statement required to be delivered pursuant to this
Section 6.1 shall be deemed to have been delivered on the date on which the
Borrower posts such financial statement on its website on the Internet at
www.crowncomm.net or when such financial statement is posted on the SEC's
website on the Internet at www.sec.gov; provided that the Borrower shall give
notice of any such posting to the Administrative Agent (who shall then give
notice of any such posting to the Lenders); provided, further, that the Borrower
shall deliver paper copies of any financial statement referred to in this
Section 6.1 to the Administrative Agent if the Administrative Agent or any
Lender requests the Borrower to deliver such paper copies until written notice
to cease delivering such paper copies is given by the Administrative Agent.

          6.2 Certificates; Other Information. Furnish to the Administrative
Agent:

          (a) concurrently with the delivery of the financial statements
     referred to in Section 6.1(a), a certificate of the independent certified
     public accountants reporting on such financial statements stating that in
     making the examination necessary therefor no knowledge was obtained of any
     Default or Event of Default, except as specified in such certificate;

          (b) concurrently with the delivery of any financial statements
     pursuant to Section 6.1, (i) a certificate of a Responsible Officer stating
     that, to the best of each such Responsible Officer's knowledge, each Loan
     Party during such period has observed or performed in all material respects
     all of its covenants and other agreements, and satisfied every condition,
     contained in this Agreement and the other Loan Documents to which it is a
     party to be observed, performed or satisfied by it, and that such
     Responsible Officer has obtained no knowledge of any Default or Event of
     Default except as specified in such certificate and (ii) in the case of
     quarterly or annual financial statements, (x) a Compliance Certificate
     containing all information and calculations
<PAGE>

                                                                              54

     necessary for determining compliance by Holdings, the Borrower and their
     respective Subsidiaries with the provisions of this Agreement referred to
     therein as of the last day of the fiscal quarter or fiscal year of the
     Borrower, as the case may be, and (y) to the extent not previously
     disclosed to the Administrative Agent, a listing of any county or state
     within the United States where any Loan Party keeps inventory or equipment
     and of any Intellectual Property acquired by any Loan Party since the date
     of the most recent list delivered pursuant to this clause (y) (or, in the
     case of the first such list so delivered, since the Closing Date);

          (c) as soon as available, and in any event no later than 50 days after
     the end of each fiscal year of the Borrower, a detailed consolidated budget
     for the following fiscal year (including a projected consolidated balance
     sheet of the Borrower and its Subsidiaries as of the end of the following
     fiscal year, the related consolidated statements of projected cash flow,
     projected changes in financial position and projected income and a
     description of the underlying assumptions applicable thereto), and, as soon
     as available, significant revisions, if any, of such budget and projections
     with respect to such fiscal year (collectively, the "Projections"), which
     Projections shall in each case be accompanied by a certificate of a
     Responsible Officer stating that such Projections have been prepared in
     good faith and are based on good faith estimates and assumptions believed
     by the Borrower to be reasonable at the time made (it being recognized by
     the Lenders that such opinions, projections and forecasts as to any future
     event or state of affairs are not to be viewed as factual information and
     that actual results during the period or periods covered by any such
     opinion, projection or forecast may differ from the opinions and projected
     or forecast results).

          (d) within 50 days after the end of each fiscal quarter of the
     Borrower, a narrative discussion and analysis of the financial condition
     and results of operations of the Borrower and its Subsidiaries for such
     fiscal quarter and for the period from the beginning of the then current
     fiscal year to the end of such fiscal quarter, as compared to the portion
     of the Projections covering such periods and to the comparable periods of
     the previous year; provided that the obligation imposed by this Section
     6.2(d) may be met by furnishing the narrative discussion and analysis of
     the financial condition and results of operations contained in the
     Form 10-Q filed by Holdings with the SEC for such fiscal quarter so long as
     such discussion and analysis accurately and clearly discloses the financial
     condition and results of operations of the Borrower and its Subsidiaries as
     a separate group;

          (e) within five days after the same are sent, copies of all financial
     statements and reports that Holdings or the Borrower sends to the holders
     of any class of its debt securities or public equity securities and, within
     five days after the same are filed, copies of all financial statements and
     reports that Holdings or the Borrower may make to, or file with, the SEC;
     and

          (f) promptly, such additional financial and other information as any
     Lender may from time to time reasonably request.

Any delivery required to be made pursuant to Section 6.2(d) or (e) shall be
deemed to have been made on the date on which the Borrower posts such delivery
on its website on the Internet at www.crowncomm.net or when such delivery is
posted on the SEC's website on the Internet at www.sec.gov; provided that the
Borrower shall give notice of any such posting to the Administrative Agent (who
shall then give notice of any such posting to the Lenders); provided, further,
that the
<PAGE>

                                                                              55

Borrower shall deliver paper copies of any delivery referred to in Section
6.2(d) or (e) to the Administrative Agent if the Administrative Agent or any
Lender requests the Borrower to deliver such paper copies until written notice
to cease delivering such paper copies is given by the Administrative Agent.

          6.3 Payment of Obligations. Pay, discharge or otherwise satisfy at or
before maturity or before they become delinquent, as the case may be, all its
material obligations of whatever nature, except (a) where the amount or validity
thereof is currently being contested in good faith by appropriate proceedings
and reserves in conformity with GAAP with respect thereto have been provided on
the books of Holdings, the Borrower or their respective Subsidiaries, as the
case may be, or (b) in the case of trade payables, as could not, in the
aggregate, reasonably be expected to have a Material Adverse Effect.

          6.4 Maintenance of Existence; Compliance. (a)(i) Preserve, renew and
keep in full force and effect its corporate existence and (ii) take all
reasonable action to maintain all rights, privileges and franchises necessary or
desirable in the normal conduct of its business, except, in each case, as
otherwise permitted by Section 7.4 and except, in the case of clause (ii) above,
to the extent that failure to do so could not reasonably be expected to have a
Material Adverse Effect; and (b) comply with all Contractual Obligations and
Requirements of Law except to the extent that failure to comply therewith could
not, in the aggregate, reasonably be expected to have a Material Adverse Effect.

          6.5 Maintenance of Property; Insurance. (a) Keep all property useful
and necessary in its business in good working order and condition, ordinary wear
and tear excepted and (b) maintain with financially sound and reputable
insurance companies insurance on all its property in at least such amounts and
against at least such risks (but including in any event public liability,
product liability and business interruption) as are usually insured against in
the same general area by companies engaged in the same or a similar business
(it being understood that, to the extent consistent with prudent business
practice of Persons carrying on a similar business in a similar location, a
program of up to $5,000,000 of self-insurance for first or other loss layers may
be utilized).

          6.6 Inspection of Property; Books and Records; Discussions. (a) Keep
proper books of records and account in which full, true and correct entries in
conformity with GAAP and all Requirements of Law shall be made of all dealings
and transactions in relation to its business and activities and (b) permit
representatives of any Lender (i) to visit and inspect any of its properties and
examine and make abstracts from any of its books and records at any reasonable
time, upon reasonable notice and as often as may reasonably be desired and
(ii) to discuss the business, operations, properties and financial and other
condition of Holdings, the Borrower and their respective Subsidiaries with
officers and employees of Holdings, the Borrower and their respective
Subsidiaries and, so long as a representative of the Borrower is present during
such discussions (unless a Default or Event of Default has occurred and is
continuing), with its independent certified public accountants. Notwithstanding
the foregoing no disclosure of information subject to confidentiality or similar
constraints shall be required by this Section 6.6.

          6.7 Notices. Promptly give notice to the Administrative Agent of:

          (a) the occurrence of any Default or Event of Default;

          (b) any (i) default or event of default under any Contractual
     Obligation of Holdings, the Borrower or any of their respective
     Subsidiaries or (ii) litigation, investigation or proceeding that
<PAGE>

                                                                              56

     may exist at any time between Holdings, the Borrower or any of their
     respective Subsidiaries and any Governmental Authority, that in the case of
     clause (b)(i) or (b)(ii), if not cured or if adversely determined, as the
     case may be, could reasonably be expected to have a Material Adverse
     Effect;

          (c) any litigation or proceeding affecting Holdings, the Borrower or
     any of their respective Subsidiaries (i) in which the amount involved is
     $5,000,000 or more and not covered by insurance, (ii) in which injunctive
     or similar relief is sought or (iii) which relates to any Loan Document;

          (d) the following events, as soon as possible and, in any event,
     within 30 days after the Borrower knows thereof: (i) the occurrence of any
     Reportable Event with respect to any Plan, a failure to make any required
     contribution to a Plan, the creation of any Lien in favor of the PBGC or a
     Plan or any withdrawal from, or the termination, Reorganization or
     Insolvency of, any Multiemployer Plan or (ii) the institution of
     proceedings or the taking of any other action by the PBGC or the Borrower
     or any Commonly Controlled Entity or any Multiemployer Plan with respect to
     the withdrawal from, or the termination, Reorganization or Insolvency of,
     any Plan; and

          (e) any development or event that has had or could reasonably be
     expected to have a Material Adverse Effect.

Each notice pursuant to this Section 6.7 shall be accompanied by a statement of
a Responsible Officer setting forth details of the occurrence referred to
therein and stating what action Holdings, the Borrower or the relevant
Subsidiary proposes to take with respect thereto.

          6.8 Environmental Laws. (a) Comply in all material respects with, and
use its reasonable efforts to ensure compliance in all material respects by all
tenants and subtenants, if any, with, all applicable Environmental Laws, and
obtain and comply in all material respects with and maintain, and use its
reasonable efforts to ensure that all tenants and subtenants obtain and comply
in all material respects with and maintain, any and all licenses, approvals,
notifications, registrations or permits required by applicable Environmental
Laws, except, in each case, to the extent that failure to do so could not
reasonably be expected to have a Material Adverse Effect.

          (b) Conduct and complete all investigations, studies, sampling and
testing, and all remedial, removal and similar actions required under
Environmental Laws and promptly comply in all material respects with all lawful
orders and directives of all Governmental Authorities regarding Environmental
Laws, except to the extent that the same are being contested in good faith by
appropriate proceedings and the pendency of such proceedings could not
reasonably be expected to have a Material Adverse Effect.

          6.9 Interest Rate Protection. The Borrower shall hedge the interest
rate, or maintain in effect a fixed interest rate, on at least 50% of the
aggregate principal amount of the total Indebtedness of Holdings, the Borrower
and its Subsidiaries on terms and conditions (including rate and tenor)
acceptable to the Administrative Agent.

          6.10 Additional Collateral, etc. (a) With respect to property acquired
after the Closing Date by the Borrower or any of its Subsidiaries (other than
(x) real property, (y) any property described
<PAGE>

                                                                              57

in paragraph (b) below and (z) any property subject to a Lien expressly
permitted by Section 7.3(g)) as to which the Administrative Agent, for the
benefit of the Lenders, does not have a perfected Lien, promptly (i) execute and
deliver to the Administrative Agent such amendments or supplements to the
relevant Security Documents or such other documents as the Administrative Agent
deems necessary or advisable to grant to the Administrative Agent, for the
benefit of the Lenders, a security interest in such property and (ii) take all
actions necessary or advisable to grant to the Administrative Agent, for the
benefit of the Lenders, a perfected security interest in such property,
including the filing of Uniform Commercial Code financing statements (or
equivalent documents) in such jurisdictions as may be required by the relevant
Security Documents or by law or as may be reasonably requested by the
Administrative Agent. So long as no Default or Event of Default has occurred and
is continuing, actions taken pursuant to this Section 6.10(a) will be consistent
with those taken in connection with the Collateral at the Closing Date.

          (b) With respect to any new Subsidiary created or acquired after the
Closing Date by Holdings (if such Subsidiary is an Unrestricted Subsidiary SPV),
the Borrower or any of its Subsidiaries (which, for the purposes of this
paragraph (b), shall include any Unrestricted Borrower Subsidiary that ceases to
qualify as such), promptly (i) execute and deliver to the Administrative Agent
such amendments or supplements to the relevant Security Documents or such other
documents as the Administrative Agent deems necessary or advisable to grant to
the Administrative Agent, for the benefit of the Lenders, a perfected security
interest in the Capital Stock of such new Subsidiary that is owned by Holdings,
the Borrower or any of its Subsidiaries, (ii) deliver to the Administrative
Agent the certificates representing such Capital Stock, together with undated
stock powers, in blank, executed and delivered by a duly authorized officer of
Holdings, the Borrower or such Subsidiary, as the case may be, (iii) cause such
new Subsidiary (A) to become a party to the Guarantee and Collateral Agreement
(or agreements having a substantially equivalent effect) , (B) to take such
actions necessary or advisable to grant to the Administrative Agent for the
benefit of the Lenders a perfected security interest in the Collateral of the
type described in the Guarantee and Collateral Agreement with respect to such
new Subsidiary, including the filing of Uniform Commercial Code financing
statements (or equivalent documents) in such jurisdictions as may be required by
the Guarantee and Collateral Agreement or by law or as may be reasonably
requested by the Administrative Agent and (C) to deliver to the Administrative
Agent a certificate of such Subsidiary, substantially in the form of Exhibit C,
with appropriate insertions and attachments, and (iv) in the case of any Foreign
Subsidiary, if reasonably requested by the Administrative Agent, deliver to the
Administrative Agent legal opinions relating to the matters described above,
which opinions shall be in form and substance, and from counsel, reasonably
satisfactory to the Administrative Agent. It is understood that any Specified
Non-Wholly Owned Subsidiary that is required to become a party to the Guarantee
and Collateral Agreement pursuant to this paragraph shall not be required to
become a "Guarantor" thereunder (until it becomes a Wholly Owned Subsidiary),
but shall be required to grant a security interest in any of its assets
constituting "Collateral" as defined therein for the purpose of securing its
obligations under its Specified Intercompany Note.

          6.11 Organizational Separateness. (a) Ensure that each Unrestricted
Subsidiary SPV does not (i) conduct, transact or otherwise engage in, or commit
to conduct, transact or otherwise engage in, any business or operations other
than those incidental to its ownership of the Capital Stock of Unrestricted
Subsidiaries, (ii) own, lease, manage or otherwise operate any properties or
assets other than the Capital Stock of Unrestricted Subsidiaries owned by it or
(iii) own the Capital Stock of both Foreign and Domestic Subsidiaries.
<PAGE>

                                                                              58

          (b) Ensure that the restrictions enumerated in paragraph (a) above are
set forth in the Governing Documents of each Unrestricted Subsidiary SPV.

          (c) Ensure that each Tower SPV does not (i) conduct, transact or
otherwise engage in, or commit to conduct, transact or otherwise engage in, any
business or operations other than those incidental to its ownership of
communications tower facilities or (ii) own, lease, manage or otherwise operate
any properties or assets other than the communications tower facilities owned by
it. Notwithstanding clauses (i) and (ii) above, (A) Crown Castle International
Corp. de Puerto Rico may continue to operate its microwave business as operated
on the Closing Date and (B) Crown Communication Inc. may hold the Capital Stock
of the Subsidiaries it owns on the Closing Date; provided that Crown
Communication Inc. shall within a reasonable time period after the Closing Date
(which time period shall in no event be longer than 60 days), come into
compliance with this Section 6.11(c) as if this sentence did not exist.

          (d) Ensure that the restrictions enumerated in paragraph (c) above are
set forth in the Governing Documents of each Tower SPV.

          (e) Ensure that Crown Castle GT Corp. does not (i) conduct, transact
or otherwise engage in, or commit to conduct, transact or otherwise engage in,
any business or operations other than those incidental to its ownership of the
Capital Stock of the GTE JV, (ii) own, lease, manage or otherwise operate any
properties or assets other than the Capital Stock of the GTE JV owned by it or
(iii) own the Capital Stock of both Foreign and Domestic Subsidiaries.

          (f) Ensure that the restrictions enumerated in paragraph (e) above are
set forth in the Governing Documents of Crown Castle GT Corp.

          (g) Cause the consolidated and any consolidating financial statements
of Holdings and its Subsidiaries (including the Tower SPVs) and the Borrower and
its Subsidiaries (including the Tower SPVs), or any thereof, through appropriate
footnote disclosure, to separately indicate that the communications tower
facilities are owned by the Tower SPVs.

          (h)(i) Maintain bank accounts with commercial banking institutions
that are separate from those of the Unrestricted Subsidiaries, the Unrestricted
Subsidiary SPVs and Crown Castle GT Corp., (ii) cause each Unrestricted
Subsidiary and Unrestricted Subsidiary SPV to maintain bank accounts, if any,
with commercial banking institutions that are separate from those of any other
Unrestricted Subsidiary or Unrestricted Subsidiary SPV or any Tower SPV or Crown
Castle GT Corp., (iii) cause each Tower SPV to maintain bank accounts, if any,
with commercial banking institutions that are separate from those of any
Unrestricted Subsidiary or Unrestricted Subsidiary SPV or Crown Castle GT Corp.
and (iv) cause Crown Castle GT Corp. to maintain bank accounts, if any, with
commercial banking institutions that are separate from those of any Unrestricted
Subsidiary, Unrestricted Subsidiary SPV or Tower SPV.

          (i) Conduct its affairs strictly in accordance with its Governing
Documents and to observe all necessary, appropriate, and customary corporate,
limited liability company and other organizational formalities, including
keeping separate and accurate minutes of meetings of its board of directors,
shareholders, managers, members or partners, as the case may be, passing all
resolutions or consents necessary to authorize actions to be taken, and
maintaining accurate and separate books, records and accounts and in a manner
permitting its assets and liabilities to be easily separated and readily
ascertained.
<PAGE>

                                                                              59

          (j) Ensure that each Unrestricted Subsidiary, Unrestricted Subsidiary
SPV and Tower SPV and Crown Castle GT Corp. strictly complies with its Governing
Documents.

          (k)(i) Ensure that its monies and other assets are not commingled with
the monies or other assets of any Unrestricted Subsidiary or Unrestricted
Subsidiary SPV or Crown Castle GT Corp. and otherwise remain clearly traceable,
(ii) cause each Unrestricted Subsidiary and Unrestricted Subsidiary SPV and
Crown Castle GT Corp. to ensure that its monies and other assets are not
commingled with the monies or other assets of any other Unrestricted Subsidiary
or Unrestricted Subsidiary SPV or any Tower SPV or Crown Castle GT Corp. and
otherwise remain clearly traceable and (iii) cause each Tower SPV to ensure that
its monies and other assets are not commingled with the monies or other assets
of any Unrestricted Subsidiary or Unrestricted Subsidiary SPV or Crown Castle GT
Corp. and otherwise remain clearly traceable.

          (l) Cause each Unrestricted Subsidiary, Unrestricted Subsidiary SPV
and Tower SPV and Crown Castle GT Corp. to not hold itself out to the public or
to any of its individual creditors as being a unified Person with common assets
and liabilities with Holdings, the Borrower or any of their respective
Subsidiaries or act in a manner that would otherwise cause its creditors to
believe that such Person was not a separate entity from such other Persons.

          (m) Without limiting the generality of the foregoing, not take any
action, or conduct its affairs in a manner, that could reasonably be expected to
result in the separate existence of any Unrestricted Subsidiary, Unrestricted
Subsidiary SPV or Tower SPV or Crown Castle GT Corp. being ignored, or the
assets and liabilities of any Unrestricted Subsidiary, Unrestricted Subsidiary
SPV or Tower SPV or Crown Castle GT Corp. being substantively consolidated with
those of Holdings, the Borrower or any of their respective Subsidiaries
(including any other Unrestricted Subsidiary, Unrestricted Subsidiary SPV or
Tower SPV or Crown Castle GT Corp.) in a bankruptcy, reorganization or other
insolvency proceeding.

          6.12 Australian Security Documents. Concurrently with the making of
any Australian Intercompany Loan, provide to the Administrative Agent such
security agreements, other documents, legal opinions and certificates as the
Administrative Agent shall reasonably request in connection therewith.

                         SECTION 7. NEGATIVE COVENANTS

          Holdings and the Borrower hereby jointly and severally agree that, so
long as the Commitments remain in effect, any Letter of Credit remains
outstanding or any Loan or other amount is owing to any Lender or the
Administrative Agent hereunder, each of Holdings and the Borrower shall not, and
shall not permit any of their respective Subsidiaries to, directly or indirectly
(provided that Sections 7.1, 7.2, 7.5, 7.6, 7.7, 7.8, 7.9, 7.11, 7.14 and 7.16
shall apply only to the Borrower and its Subsidiaries):

          7.1 Financial Condition Covenants.

              (a) Consolidated Leverage Ratio. Permit the Consolidated Leverage
Ratio determined as of the last day of any fiscal quarter of the Borrower ending
during any period set forth below to exceed the ratio set forth below opposite
such period:
<PAGE>

                                                                              60

          Period                           Consolidated Leverage Ratio
          ------                           ---------------------------

    Closing Date - 12/31/00                         7.50 to 1.00
    01/01/01 - 06/30/01                             7.00 to 1.00
    07/01/01 - 12/31/01                             6.50 to 1.00
    01/01/02 - 12/31/02                             5.50 to 1.00
    01/01/03 - 12/31/03                             4.50 to 1.00
    01/01/04 and thereafter                         4.00 to 1.00

          (b) Consolidated Interest Coverage Ratio. Permit the Consolidated
Interest Coverage Ratio determined as of the last day of any fiscal quarter
ending during any period set forth below to be less than the ratio set forth
below opposite such period:
                                           Consolidated Interest Fiscal
      Fiscal Quarter                             Coverage Ratio
      --------------                       ----------------------------

    03/31/00 - 12/31/01                             1.75 to 1.00
    01/01/02 - 12/31/02                             2.00 to 1.00
    01/01/03 - 12/31/03                             2.25 to 1.00
    01/01/04 - 12/31/04                             2.50 to 1.00
    01/01/05 and thereafter                         2.75 to 1.00

          (c) Consolidated Debt Service Coverage Ratio. Permit the Consolidated
Debt Service Coverage Ratio determined as of the last day of any fiscal quarter
ending after March 31, 2000 to be less than 1.15 to 1.00.

          (d) Consolidated Fixed Charge Coverage Ratio. Permit the Consolidated
Fixed Charge Coverage Ratio determined as of the last day of any fiscal quarter
ending after March 31, 2000 to be less than 1.10 to 1.00.

For the purposes of paragraphs (b), (c) and (d) above, in calculating the
relevant ratios for any period that is not comprised of four fiscal quarters
commencing after the Closing Date, Consolidated Cash Interest Expense and
Consolidated Fixed Charges for the relevant period shall be deemed to equal
Consolidated Cash Interest Expense or Consolidated Fixed Charges, as applicable,
for the number of fiscal quarters commencing after December 31, 1999 that fall
within such period multiplied by the appropriate factor necessary to annualize
such amount.

          7.2 Indebtedness. Create, issue, incur, assume, become liable in
respect of or suffer to exist any Indebtedness, except:

          (a) Indebtedness of any Loan Party pursuant to any Loan Document;

          (b) Indebtedness of (i) the Borrower to any Subsidiary, (ii) any
Wholly Owned Subsidiary Guarantor to the Borrower or any other Subsidiary and
(iii) any Specified Non-Wholly Owned Subsidiary to the Borrower or any Wholly
Owned Qualifying Subsidiary Guarantor pursuant to a Specified Intercompany Note,
provided that for purposes of this Section 7.2(b), the
<PAGE>

                                                                              61

Australian Subsidiary shall be considered a Wholly Owned Subsidiary Guarantor so
long as all of its Capital Stock is pledged as Collateral;

     (c)(i) Guarantee Obligations incurred in the ordinary course of business by
the Borrower or any of its Subsidiaries of obligations of any Wholly Owned
Subsidiary Guarantor and (ii) Guarantee Obligations incurred in the ordinary
course of business by any Subsidiary Guarantor of obligations of the Borrower;

     (d) Indebtedness outstanding on the date hereof and listed on Schedule
7.2(d) and any refinancings, refundings, renewals or extensions thereof (without
increasing, or shortening the maturity of, the principal amount thereof, other
than to the extent permitted by Section 7.2(l));

     (e) Indebtedness (including, without limitation, Capital Lease Obligations)
secured by Liens permitted by Section 7.3(g) in an aggregate principal amount
not to exceed $25,000,000 at any one time outstanding;

     (f) Hedge Agreements in respect of Indebtedness otherwise permitted hereby
that bears interest at a floating rate, so long as such agreements are not
entered into for speculative purposes;

     (g) Indebtedness of any Subsidiary acquired in connection with any
Investment permitted pursuant to Section 7.7(i) or (j); provided that (i) such
Indebtedness existed at the time such Person became a Subsidiary and was not
incurred in anticipation thereof, (ii) no Person other than such Subsidiary
becomes an obligor in respect of such Indebtedness and (iii) the aggregate
amount of such Indebtedness (whether or not subsequently repaid) shall
constitute usage of the basket provided in Section 7.7(i)(i) or (j)(i), as
applicable, unless and until such Subsidiary becomes a Wholly Owned Qualifying
Subsidiary Guarantor, at which time such Indebtedness of such Subsidiary shall
no longer be permitted to remain outstanding and shall no longer constitute
usage of such baskets;

     (h) Indebtedness of any Subsidiary to the Borrower; provided that (i) no
Person other than such Subsidiary becomes an obligor in respect of such
Indebtedness and (ii) the actual outstanding aggregate amount of such
Indebtedness shall constitute usage of the basket provided in Section 7.7(i)(i)
or (j)(i), as applicable, unless and until such Subsidiary becomes a Wholly
Owned Qualifying Subsidiary Guarantor, at which time such Indebtedness of such
Subsidiary shall no longer constitute usage of such baskets;

     (i) Indebtedness consisting of guaranties of loans made to officers,
directors or employees of Holdings, the Borrower or any Subsidiary of the
Borrower in an aggregate amount which, when added to the outstanding principal
amount of loans and advances made pursuant to Section 7.7(d), shall not exceed
$5,000,000 at any one time outstanding;

     (j) unsecured trade accounts payable incurred in the ordinary course of
business and not more than 120 days past due (but excluding any Indebtedness for
borrowed money);

     (k) Permitted Borrower Subordinated Indebtedness owing by the Borrower to
Holdings; and
<PAGE>

                                                                              62

          (l) additional Indebtedness of the Borrower or any of its Subsidiaries
in an aggregate principal amount (for the Borrower and all Subsidiaries) not to
exceed $25,000,000 at any one time outstanding.

Notwithstanding anything to the contrary in this Agreement, the Borrower shall
not, and shall not permit any of its Subsidiaries to, directly or indirectly,
guarantee or otherwise become liable in respect of any Indebtedness or preferred
stock of Holdings.

          7.3 Liens. Create, incur, assume or suffer to exist any Lien upon any
of its property, whether now owned or hereafter acquired, except:

          (a) Liens for taxes not yet due or that are being contested in good
    faith by appropriate proceedings, provided that adequate reserves with
    respect thereto are maintained on the books of the Borrower or its
    Subsidiaries, as the case may be, in conformity with GAAP;

          (b) carriers', warehousemen's, mechanics', materialmen's, repairmen's
    or other like Liens arising in the ordinary course of business that secure
    payments that are not more than 60 days delinquent in accordance with their
    terms or that are being contested in good faith by appropriate proceedings;

          (c) pledges or deposits in connection with workers' compensation,
     unemployment insurance and other social security legislation and deposits
     securing liability to insurance carriers under insurance or self-insurance
     arrangements;

          (d) deposits to secure the performance of bids, trade contracts (other
     than for borrowed money), leases, statutory obligations, surety and appeal
     bonds, performance bonds and other obligations of a like nature incurred in
     the ordinary course of business;

          (e) easements, rights-of-way, restrictions and other similar
     encumbrances that, in the aggregate, are not substantial in amount and that
     do not in any case materially detract from the value of the property
     subject thereto or materially interfere with the ordinary conduct of the
     business of the Borrower or any of its Subsidiaries;

          (f) Liens in existence on the date hereof listed on Schedule 7.3(f),
     securing Indebtedness permitted by Section 7.2(d), provided that no such
     Lien is spread to cover any additional property after the Closing Date and
     that the amount of Indebtedness secured thereby is not increased (except to
     the extent permitted by Section 7.3(o));

          (g) Liens securing Indebtedness of the Borrower or any other
     Subsidiary incurred pursuant to Section 7.2(e) to finance the acquisition
     of fixed or capital assets, provided that (i) such Liens shall be created
     substantially simultaneously with the acquisition of such fixed or capital
     assets, (ii) such Liens do not at any time encumber any property other than
     the property financed by such Indebtedness and (iii) the amount of
     Indebtedness secured thereby is not increased;

          (h) Liens created pursuant to the Security Documents;
<PAGE>

                                                                              63

          (i) any interest or title of a lessor (including sublessors) under any
    lease (or sublease) entered into by the Borrower or any other Subsidiary in
    the ordinary course of its business and covering only the assets so leased;

          (j) Liens on the property or assets of a Person which becomes a
    Subsidiary after the date hereof securing Indebtedness permitted by Section
    7.2(g), provided that (i) such Liens existed at the time such Person became
    a Subsidiary and were not created in anticipation thereof, (ii) any such
    Lien is not expanded to cover any property or assets of such Person after
    the time such Person becomes a Subsidiary (other than after acquired title
    in or on such property and proceeds of the existing collateral in accordance
    with the instrument creating such Lien), (iii) the amount of Indebtedness
    secured thereby is not increased, and (iv) neither (x) the aggregate
    outstanding principal amount of the obligations secured thereby nor (y) the
    aggregate fair market value (determined as of the date such Lien is
    incurred) of the assets subject thereto exceeds (as to all relevant
    Subsidiaries) $20,000,000 at any one time;

          (k) licenses, leases or subleases permitted hereunder granted to other
    Persons in the ordinary course of business not interfering in any material
    respect in the business of the Borrower or any of its Subsidiaries;

          (l) attachment or judgment Liens in respect of judgments or decrees
    that have been vacated, discharged, stayed or bonded pending appeal within
    60 days from the entry thereof and, in addition, attachment or judgment
    Liens in an aggregate amount outstanding at any one time not in excess of
    $5,000,000 (not paid or fully covered by insurance as to which the relevant
    insurance company has acknowledged in writing coverage);

          (m) Liens arising from precautionary Uniform Commercial Code financing
    statement filings with respect to operating leases or consignment
    arrangements entered into by the Borrower or any of its Subsidiaries in the
    ordinary course of business;

          (n) Liens in favor of a banking institution arising by operation of
    law encumbering deposits (including the right of set-off) held by such
    banking institution incurred in the ordinary course of business and that are
    within the general parameters customary in the banking industry; and

          (o) Liens not otherwise permitted by this Section so long as neither
    (i) the aggregate outstanding principal amount of the obligations secured
    thereby nor (ii) the aggregate fair market value (determined as of the date
    such Lien is incurred) of the assets subject thereto exceeds (as to the
    Borrower and all Subsidiaries) $20,000,000 at any one time.

          7.4 Fundamental Changes. Enter into any merger, consolidation or
amalgamation, or liquidate, wind up or dissolve itself (or suffer any
liquidation or dissolution), or Dispose of, all or substantially all of its
property or business, except that:

          (a) any Subsidiary of the Borrower may be merged or consolidated with
    or into the Borrower (provided that the Borrower shall be the continuing or
    surviving corporation) or with or into any Wholly Owned Subsidiary Guarantor
    (provided that the Wholly Owned Subsidiary Guarantor shall be the continuing
    or surviving corporation and provided, further, that if the merged
<PAGE>

                                                                              64

    or consolidated Subsidiary is a Wholly Owned Qualifying Subsidiary
    Guarantor, the continuing or surviving corporation must also be a Wholly
    Owned Qualifying Subsidiary Guarantor);

           (b) any Subsidiary of the Borrower may Dispose of any or all of its
    assets (upon voluntary liquidation or otherwise) to the Borrower or any
    Wholly Owned Subsidiary Guarantor, provided that if the Subsidiary making
    such Disposition is a Wholly Owned Qualifying Subsidiary Guarantor, the
    relevant transferee, if other than the Borrower, must also be a Wholly Owned
    Qualifying Subsidiary Guarantor; and

          (c) so long as no Default or Event of Default has occurred or is
    continuing or would result therefrom, Holdings may be merged or consolidated
    with or into another Person (provided that either (i) Holdings is the
    continuing or surviving entity or (ii) if Holdings is not the continuing or
    surviving entity, such continuing or surviving entity assumes the
    obligations of Holdings under the Loan Documents to which it is a party
    pursuant to an instrument in form and substance reasonably satisfactory to
    the Administrative Agent and, in connection therewith, the Administrative
    Agent shall receive such legal opinions, certificates and other documents as
    it may reasonably request).

          7.5 Disposition of Property. Dispose of any of its property, whether
now owned or hereafter acquired, or, in the case of any Subsidiary, issue or
sell any shares of such Subsidiary's Capital Stock to any Person, except:

          (a) the Disposition of obsolete, condemned or worn out property in the
    ordinary course of business;

          (b) the sale of inventory in the ordinary course of business; the
    Disposition of Cash Equivalents for fair value for cash or other Cash
    Equivalents; the license of Intellectual Property in the ordinary course of
    business; and leases or subleases entered into in the ordinary course of
    business and not materially interfering with the ordinary conduct of
    business;

          (c) Dispositions permitted by Section 7.4(b);

          (d) the sale or issuance of any Subsidiary's Capital Stock to the
     Borrower or any Wholly Owned Subsidiary Guarantor; provided that if the
     selling or issuing Subsidiary is a Wholly Owned Qualifying Subsidiary
     Guarantor, the recipient of such Capital Stock, if other than the Borrower,
     must also be a Wholly Owned Qualifying Subsidiary Guarantor;

          (e) the Disposition of the Capital Stock of the GTE JV to GTE Wireless
     pursuant to the right of first refusal granted to GTE Wireless in the GTE
     JV Formation Agreement, dated as of November 7, 1999, it being understood
     that the Net Cash Proceeds of such Disposition shall be applied to prepay
     the Loans and reduce the Commitments to the extent required by Section
     2.9(b);

          (f) the designation of the Australian Subsidiary as an Unrestricted
     Subsidiary and the making of the Australian Subsidiary into a Subsidiary of
     Holdings, in each case pursuant to the terms of Section 7.20;
<PAGE>

                                                                              65

          (g) the designation of any Specified Non-Wholly Owned Subsidiary as an
    Unrestricted Subsidiary and the making of any Specified Non-Wholly Owned
    Subsidiary into a Subsidiary of Holdings, in each case pursuant to the terms
    of Section 7.20; and

          (h) the Disposition of other property having a fair market value not
    to exceed $50,000,000 in the aggregate for any fiscal year of the Borrower,
    it being understood that the Net Cash Proceeds of such Dispositions shall be
    applied to prepay the Loans and reduce the Commitments to the extent
    required by Section 2.9(b).

          7.6 Restricted Payments. Declare or pay any dividend (other than
dividends payable solely in common stock of the Person making such dividend) on,
or make any payment on account of, or set apart assets for a sinking or other
analogous fund for, the purchase, redemption, defeasance, retirement or other
acquisition of, any Capital Stock of Holdings, the Borrower or any Subsidiary,
whether now or hereafter outstanding, or make any other distribution in respect
thereof, either directly or indirectly, whether in cash or property or in
obligations of Holdings, the Borrower or any Subsidiary (collectively,
"Restricted Payments"), except that:

          (a) any Subsidiary may make Restricted Payments to the Borrower or any
    Wholly Owned Subsidiary Guarantor; provided that if the Subsidiary making
    such a Restricted Payment is a Wholly Owned Qualifying Subsidiary Guarantor,
    the recipient of such Restricted Payment, if other than the Borrower, must
    also be a Wholly Owned Qualifying Subsidiary Guarantor;

          (b) so long as no Default or Event of Default shall have occurred and
    be continuing or would result therefrom (including, on a pro forma basis,
    pursuant to Section 7.1), the Borrower may pay dividends to Holdings to
    permit Holdings to purchase Holdings' common stock or common stock options
    from present or former officers or employees of Holdings, the Borrower or
    any Subsidiary upon the death, disability or termination of employment of
    such officer or employee, provided, that the aggregate amount of payments
    under this paragraph (b) after the date hereof (net of any proceeds received
    by Holdings and contributed to the Borrower after the date hereof in
    connection with resales of any common stock or common stock options so
    purchased) shall not exceed $10,000,000 in any fiscal year of the Borrower
    or $25,000,000 during the term of this Agreement;

          (c) so long as no Default or Event of Default shall have occurred and
    be continuing or would result therefrom (including, on a pro forma basis,
    pursuant to Section 7.1), the Borrower may pay dividends to Holdings to
    permit Holdings to (i) pay corporate overhead expenses incurred in the
    ordinary course of business not to exceed $17,500,000 in any fiscal year,
    (ii) pay any taxes that are due and payable by Holdings and the Borrower as
    part of a consolidated group and (iii) make scheduled interest and dividend
    payments in respect of Holdings Qualified Obligations;

          (d) so long as no Default or Event of Default shall have occurred and
    be continuing or would result therefrom (including, on a pro forma basis,
    pursuant to Section 7.1), any Subsidiary of the Borrower may pay dividends
    to the holders of its common stock; provided that all such dividends shall
    be made pro rata according to the respective ownership interests in such
    Subsidiary;
<PAGE>

                                                                              66

          (e) notwithstanding anything to the contrary in this Agreement, the
    GTE JV may pay dividends to the holders of its Capital Stock; provided that
    all such dividends shall be made pro rata according to the respective
    ownership interests in the GTE JV; and

          (f) the GTE Distribution may be made.

It is understood that nothing contained in this Section 7.6 shall restrict the
ability of Holdings to make Restricted Payments.

          7.7 Investments. Make any advance, loan, extension of credit (by way
of guaranty or otherwise) or capital contribution to, or purchase any Capital
Stock, bonds, notes, debentures or other debt securities of, or any assets
constituting a business unit of, or make any other investment in, any Person
(all of the foregoing, "Investments"), except:

          (a) extensions of trade credit in the ordinary course of business;

          (b) Investments in Cash Equivalents;

          (c) Guarantee Obligations permitted by Section 7.2;

          (d) loans and advances to officers, directors and employees of
     Holdings, the Borrower or any Subsidiary of the Borrower in the ordinary
     course of business (including for travel, entertainment and relocation
     expenses) in an aggregate amount for Holdings, the Borrower or any
     Subsidiary of the Borrower which, when added to the outstanding principal
     amount of Indebtedness incurred pursuant to Section 7.2(i), shall not
     exceed $5,000,000 at any one time outstanding;

          (e) Investments in assets useful in the business of the Borrower and
     its Subsidiaries made by the Borrower or any of its Subsidiaries with the
     proceeds of any Reinvestment Deferred Amount;

          (f) so long as no Default or Event of Default shall have occurred and
     be continuing or would result therefrom (including, on a pro forma basis,
     pursuant to Section 7.1), Investments by the Borrower or any of its
     Subsidiaries in the Borrower or any Person that is or concurrently
     therewith becomes a Wholly Owned Qualifying Subsidiary Guarantor;

          (g) so long as no Default or Event of Default shall have occurred and
     be continuing or would result therefrom (including, on a pro forma basis,
     pursuant to Section 7.1), acquisitions by the Borrower or any Wholly Owned
     Qualifying Subsidiary Guarantor of communications tower facilities;

          (h) the acquisitions listed on Schedule 7.7(h);

          (i) so long as no Default or Event of Default has occurred and is
     continuing (including, on a pro forma basis, pursuant to Section 7.1),
     Investments in any Person that is or concurrently therewith becomes a
     Subsidiary of the Borrower, in an aggregate amount (net of any return of
     capital) not to exceed at any time the sum of (i) $50,000,000 and (ii) the
     amount of cash
<PAGE>

                                                                              67

     contributed by Holdings to the Borrower after the Closing Date in the form
     of common equity and used by the Borrower solely for such purpose;

          (j) in addition to Investments otherwise expressly permitted by this
     Section, so long as no Default or Event of Default has occurred and is
     continuing (including, on a pro forma basis, pursuant to Section 7.1),
     Investments of any type by the Borrower or any of its Subsidiaries in an
     aggregate amount (net of any return of capital) not to exceed at any time
     the sum of (i) $125,000,000 and (ii) the amount of cash contributed by
     Holdings to the Borrower after the Closing Date in the form of common
     equity and used by the Borrower solely for such purpose;

          (k) the Australian Intercompany Loans; and

          (l) in addition to Investments otherwise expressly permitted by this
     Section, with the consent of the Required Lenders, any Investment in any
     Person that is not or will not concurrently therewith become a Wholly Owned
     Qualifying Subsidiary Guarantor.

          7.8 Certain Payments and Modifications of Certain Agreements.

          (a) Make or offer to make any payment, prepayment, repurchase or
     redemption in respect of, or otherwise optionally or voluntarily defease or
     segregate funds with respect to, any Permitted Borrower Subordinated
     Indebtedness other than the payment of such Indebtedness with the proceeds
     of Revolving Loans.

          (b) Amend, modify, waive or otherwise change, or consent or agree to
     any amendment, modification, waiver or other change to, any of the terms of
     (i) any Permitted Borrower Subordinated Indebtedness (other than any such
     amendment, modification, waiver or other change that would extend the
     maturity or reduce the amount of any payment of principal thereof or reduce
     the rate or extend any date for payment of interest thereon) or (ii) the
     agreements governing the GTE JV or the arrangements with Bell South
     Mobility Inc. (other than any such amendment, modification, waiver or other
     change that is immaterial to the interests of the Lenders).

          7.9 Transactions with Affiliates. Enter into any transaction,
including any purchase, sale, lease or exchange of property, the rendering of
any service or the payment of any management, advisory or similar fees, with any
Affiliate (other than the Borrower or any Wholly Owned Subsidiary Guarantor)
unless such transaction is (a) otherwise permitted under this Agreement, (b) in
the ordinary course of business of the Borrower or such Subsidiary, as the case
may be, and (c) upon fair and reasonable terms no less favorable to the Borrower
or such Subsidiary, as the case may be, than it would obtain in a comparable
arm's length transaction with a Person that is not an Affiliate.

          7.10 Sales and Leasebacks. Enter into any arrangement with any Person
providing for the leasing by Holdings, the Borrower or any Subsidiary of real or
personal property that has been or is to be sold or transferred by Holdings, the
Borrower or such Subsidiary to such Person or to any other Person to whom funds
have been or are to be advanced by such Person on the security of such property
or rental obligations of Holdings, the Borrower or such Subsidiary.
<PAGE>

                                                                              68

          7.11 Changes in Fiscal Periods. Permit the fiscal year of the Borrower
to end on a day other than December 31 or change the Borrower's method of
determining fiscal quarters.

          7.12 Negative Pledge Clauses. Enter into or suffer to exist or become
effective any agreement that prohibits or limits the ability of Holdings, the
Borrower or any of its Subsidiaries to create, incur, assume or suffer to exist
any Lien upon any of its property or revenues, whether now owned or hereafter
acquired, other than (a) this Agreement and the other Loan Documents, (b) any
agreements governing any purchase money Liens or Capital Lease Obligations
otherwise permitted hereby (in which case, any prohibition or limitation shall
only be effective against the assets financed thereby), (c) any agreements
governing any Investment in any joint venture (other than a Subsidiary) that
limit the ability to grant a security interest in the Capital Stock of such
joint venture, (d) customary restrictions entered into in the ordinary course of
business with respect to Intellectual Property that limit the ability to grant a
security interest in such Intellectual Property, (e) any agreements governing
any leasehold interest that limit the ability to grant a security interest in
such leasehold interest, (f) restrictions in the formation agreement of the GTE
JV or in the organizational documents of any Specified Non-Wholly Owned
Subsidiary that limit the ability to grant a security interest in the assets of
such Person, (g) the Holdings Debt Agreements and (h) any agreements containing
restrictions substantially comparable to those described in clause (g) above and
governing any other Indebtedness of Holdings.

          7.13 Clauses Restricting Subsidiary Distributions. Enter into or
suffer to exist or become effective any consensual encumbrance or restriction on
the ability of any Subsidiary of the Borrower to (a) make Restricted Payments in
respect of any Capital Stock of such Subsidiary held by, or pay any Indebtedness
owed to, the Borrower or any other Subsidiary of the Borrower, (b) make loans or
advances to, or other Investments in, the Borrower or any other Subsidiary of
the Borrower or (c) transfer any of its assets to the Borrower or any other
Subsidiary of the Borrower, except for such encumbrances or restrictions
existing under or by reason of (i) any restrictions existing under the Loan
Documents, (ii) any restrictions with respect to a Subsidiary imposed pursuant
to an agreement that has been entered into in connection with the Disposition of
all or substantially all of the Capital Stock or assets of such Subsidiary,
(iii) any restrictions imposed pursuant to the Holdings Debt Agreements and
(iv) any restrictions substantially comparable to the restrictions permitted by
clause (iii) above and imposed pursuant to any agreement governing any other
Indebtedness of Holdings.

          7.14 Lines of Business. Enter into any business, either directly or
through any Subsidiary, except for those businesses in which the Borrower and
its Subsidiaries are engaged on the date of this Agreement or that are
reasonably related thereto.

          7.15 Holding Company Status. In the case of Holdings, (a) conduct,
transact or otherwise engage in, or commit to conduct, transact or otherwise
engage in, any business or operations other than those incidental to its
ownership of Capital Stock described in clause (b) below, (b) own, lease, manage
or otherwise operate any properties or assets other than cash, Cash Equivalents
and the Capital Stock of the Borrower or any other Person (so long as, in the
case of any such Person that is a Subsidiary of Holdings, such Subsidiary is
either an Unrestricted Holdings Subsidiary or an Unrestricted Subsidiary SPV
(other than Crown Castle do Brasil Ltda., Crown Castle Mexico and Crown Castle
Ireland Limited, which shall within a reasonable time period after the Closing
Date (which time period shall in no event be longer than 60 days) become
Subsidiaries of the Borrower)) and (c) permit any Subsidiary of any Unrestricted
Subsidiary SPV not to qualify as an Unrestricted Subsidiary at any time. It is
understood and agreed that this Section 7.15 shall not prevent Holdings from (x)
performing management and
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                                                                              69

administrative functions of the type performed by it as of the Closing Date or
(y) incurring Indebtedness or issuing Capital Stock.

          7.16 Communications Tower Facilities. Hold any communications tower
facilities, whether now owned or hereafter acquired, other than in a Tower SPV.

          7.17 Unrestricted Subsidiary Capital Stock; GTE JV Capital Stock. (a)
Hold any of the Capital Stock of an Unrestricted Subsidiary other than in an
Unrestricted Subsidiary SPV.

          (b) Hold any of the Capital Stock of the GTE JV owned directly or
indirectly by the Borrower other than in Crown Castle GT Corp.

          7.18 GTE JV and Crown Castle GT Corp.; Specified Non-Wholly Owned
Subsidiaries, Tower SPVs and Unrestricted Subsidiary SPVs; Australian
Subsidiary. (a) Permit the GTE JV or Crown Castle GT Corp. to incur or suffer to
exist any Indebtedness or create, incur, assume or suffer to exist any Lien upon
any of its property, whether now owned or hereafter acquired.

          (b) Permit any Specified Non-Wholly Owned Subsidiary (or any
Subsidiary thereof), Tower SPV or Unrestricted Subsidiary SPV to incur or suffer
to exist any Indebtedness or create, incur, assume or suffer to exist any Lien
upon any of its property, whether now owned or hereafter acquired, in each case
other than pursuant to the Loan Documents to which it is a party.

          (c) Permit the direct parent of the Australian Subsidiary, the
Australian Subsidiary (or any Subsidiary thereof) to incur or suffer to exist
any Indebtedness or create, incur, assume or suffer to exist any Lien upon any
of its property, whether now owned or hereafter acquired, in each case other
than pursuant to the Loan Documents to which it is a party.

          7.19 Designation of Unrestricted Subsidiaries as Subsidiaries. If a
Default or Event of Default shall have occurred and be continuing or would
result therefrom (including, on a pro forma basis, pursuant to Section 7.1),
designate an Unrestricted Subsidiary as a Subsidiary. Notwithstanding anything
to the contrary contained in this Agreement, so long as no Default or Event of
Default shall have occurred and be continuing or would result therefrom
(including, on a pro forma basis, pursuant to Section 7.1), the Borrower may
designate an Unrestricted Subsidiary as a Subsidiary.

          7.20 Designation of Subsidiaries as Unrestricted Subsidiaries. Other
than in accordance with this Section 7.20, designate a Subsidiary as an
Unrestricted Subsidiary other than concurrently with the creation or acquisition
thereof. Notwithstanding anything to the contrary contained in this Agreement,
so long as (a) no Default or Event of Default would result therefrom (including,
on a pro forma basis, pursuant to Section 7.1) and (b) the Australian Subsidiary
has, concurrently with such designation, paid to the Borrower in full in cash an
amount equal to the greater of (i) the Australian Intercompany Loans and (ii)
the amount of Consolidated EBITDA attributable to the Australian Subsidiary for
the most recent period of four consecutive fiscal quarters for which the
relevant financial information is available multiplied by the then applicable
Consolidated Leverage Ratio required by Section 7.1(a), the Borrower may
designate each of the Australian Subsidiary and its direct parent as an
Unrestricted Subsidiary to the extent each otherwise qualifies as an
Unrestricted Subsidiary. Notwithstanding anything to the contrary contained in
this Agreement, so long as (a) no Default or Event of Default would result
therefrom (including, on a pro forma basis, pursuant to Section 7.1) and (b) the
relevant Specified Non-Wholly
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                                                                              70

Owned Subsidiary has, concurrently with such designation, paid to the Borrower
or the relevant Wholly Owned Qualifying Subsidiary Guarantor, as applicable, in
full in cash an amount equal to the greater of (i) the obligations under its
Specified Intercompany Note and (ii) the amount of Consolidated EBITDA
attributable to such Specified Non-Wholly Owned Subsidiary for the most recent
period of four consecutive fiscal quarters for which the relevant financial
information is available pursuant to clause (x) of the definition of
"Consolidated EBITDA" multiplied by 7.50, the Borrower may designate such
Specified Non-Wholly Owned Subsidiary as an Unrestricted Subsidiary to the
extent it otherwise qualifies as an Unrestricted Subsidiary. If any Subsidiary
is designated as an Unrestricted Subsidiary pursuant to either of the preceding
sentences, (i) the Liens on the assets of such Subsidiary created by the
Security Documents to which such Subsidiary is a party will be released and all
obligations (other than those expressly stated to survive such termination) of
such Subsidiary under such Security Documents shall terminate, all without
delivery of any instrument or performance of any act by any Person and (ii) such
Subsidiary may become a Subsidiary of Holdings. In addition, if the Australian
Subsidiary is designated as an Unrestricted Subsidiary pursuant to this Section
7.20, any pledge of its Capital Stock then in existence other than by the
Borrower or any of its Affiliates will be released without delivery of any
instrument or performance of any act by any Person.

                         SECTION 8. EVENTS OF DEFAULT

          If any of the following events shall occur and be continuing:

          (a) the Borrower shall fail to pay any principal of any Loan or
     Reimbursement Obligation when due in accordance with the terms hereof; or
     the Borrower shall fail to pay any interest on any Loan or Reimbursement
     Obligation, or any other amount payable hereunder or under any other Loan
     Document, within three days after any such interest or other amount becomes
     due in accordance with the terms hereof; or

          (b) any representation or warranty made or deemed made by any Loan
     Party herein or in any other Loan Document or that is contained in any
     certificate, document or financial or other statement furnished by it at
     any time under or in connection with this Agreement or any such other Loan
     Document shall prove to have been inaccurate in any material respect on or
     as of the date made or deemed made; or

          (c) any Loan Party shall default in the observance or performance of
     any agreement contained in clause (i) of Section 6.4(a) (with respect to
     Holdings and the Borrower only), Section 6.7(a), Section 6.11 or Section 7
     of this Agreement or Sections 5.4 and 5.5(b) of the Guarantee and
     Collateral Agreement; or

          (d) any Loan Party shall default in the observance or performance of
     any other agreement contained in this Agreement or any other Loan Document
     (other than as provided in paragraphs (a) through (c) of this Section), and
     such default shall continue unremedied for a period of 30 days after notice
     to the Borrower from the Administrative Agent or the Required Lenders; or

          (e) Holdings, the Borrower or any of their respective Subsidiaries
     shall (i) default in making any payment of any principal of any
     Indebtedness (including any Guarantee Obligation, but excluding the Loans)
     on the scheduled or original due date with respect thereto (giving effect
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                                                                              71

     to any applicable grace periods); or (ii) default in making any payment of
     any interest on any such Indebtedness beyond the period of grace, if any,
     provided in the instrument or agreement under which such Indebtedness was
     created; or (iii) default in the observance or performance of any other
     agreement or condition relating to any such Indebtedness or contained in
     any instrument or agreement evidencing, securing or relating thereto, or
     any other event shall occur or condition exist, the effect of which default
     or other event or condition is to cause, or to permit the holder or
     beneficiary of such Indebtedness (or a trustee or agent on behalf of such
     holder or beneficiary) to cause, with the giving of notice if required,
     such Indebtedness to become due prior to its stated maturity or (in the
     case of any such Indebtedness constituting a Guarantee Obligation) to
     become payable; provided, that a default, event or condition described in
     clause (i), (ii) or (iii) of this paragraph (e) shall not at any time
     constitute an Event of Default unless, at such time, one or more defaults,
     events or conditions of the type described in clauses (i), (ii) and (iii)
     of this paragraph (e) shall have occurred and be continuing with respect to
     Indebtedness the outstanding principal amount of which exceeds in the
     aggregate $10,000,000; or

          (f) (i) Holdings, the Borrower or any of their respective Subsidiaries
     shall commence any case, proceeding or other action (A) under any existing
     or future law of any jurisdiction, domestic or foreign, relating to
     bankruptcy, insolvency, reorganization or relief of debtors, seeking to
     have an order for relief entered with respect to it, or seeking to
     adjudicate it a bankrupt or insolvent, or seeking reorganization,
     arrangement, adjustment, winding-up, liquidation, dissolution, composition
     or other relief with respect to it or its debts, or (B) seeking appointment
     of a receiver, trustee, custodian, conservator or other similar official
     for it or for all or any substantial part of its assets, or Holdings, the
     Borrower or any of their respective Subsidiaries shall make a general
     assignment for the benefit of its creditors; or (ii) there shall be
     commenced against Holdings, the Borrower or any of their respective
     Subsidiaries any case, proceeding or other action of a nature referred to
     in clause (i) above that (A) results in the entry of an order for relief or
     any such adjudication or appointment or (B) remains undismissed,
     undischarged or unbonded for a period of 60 days; or (iii) there shall be
     commenced against Holdings, the Borrower or any of their respective
     Subsidiaries any case, proceeding or other action seeking issuance of a
     warrant of attachment, execution, distraint or similar process against all
     or any substantial part of its assets that results in the entry of an order
     for any such relief that shall not have been vacated, discharged, or stayed
     or bonded pending appeal within 60 days from the entry thereof; or (iv)
     Holdings, the Borrower or any of their respective Subsidiaries shall take
     any action in furtherance of, or indicating its consent to, approval of, or
     acquiescence in, any of the acts set forth in clause (i), (ii), or (iii)
     above; or (v) Holdings, the Borrower or any of their respective
     Subsidiaries shall generally not, or shall be unable to, or shall admit in
     writing its inability to, pay its debts as they become due; or

         (g) (i) any Person shall engage in any "prohibited transaction" (as
     defined in Section 406 of ERISA or Section 4975 of the Code) involving any
     Plan, (ii) any "accumulated funding deficiency" (as defined in Section 302
     of ERISA), whether or not waived, shall exist with respect to any Plan or
     any Lien in favor of the PBGC or a Plan shall arise on the assets of the
     Borrower or any Commonly Controlled Entity, (iii) a Reportable Event shall
     occur with respect to, or proceedings shall commence to have a trustee
     appointed, or a trustee shall be appointed pursuant to Section 4042(b) of
     ERISA, to administer or to terminate, any Single Employer Plan, which
     Reportable Event or commencement of proceedings or appointment of a trustee
     is reasonably likely to result in the termination of such Plan for purposes
     of Title IV of ERISA, (iv) any Single Employer Plan shall terminate for
     purposes of Title IV of ERISA, (v) the Borrower or any
<PAGE>

                                                                              72

     Commonly Controlled Entity shall incur any liability in connection with a
     withdrawal from, or the Insolvency or Reorganization of, a Multiemployer
     Plan or (vi) any other event or condition shall occur or exist with respect
     to a Plan; and in each case in clauses (i) through (vi) above, such event
     or condition, together with all other such events or conditions, if any,
     could, in the reasonable opinion of the Required Lenders, reasonably be
     expected to have a Material Adverse Effect; or

          (h) one or more judgments or decrees shall be entered against
     Holdings, the Borrower or any of their respective Subsidiaries involving in
     the aggregate a liability (to the extent not paid or fully covered by
     insurance as to which the relevant insurance company has acknowledged
     coverage) of $10,000,000 or more, and all such judgments or decrees shall
     not have been vacated, discharged, stayed or bonded pending appeal within
     30 days from the entry thereof; or

          (i) any of the Security Documents shall cease, for any reason, to be
     in full force and effect, or any Loan Party or any Affiliate of any Loan
     Party shall so assert, or any Lien created by any of the Security Documents
     shall cease to be enforceable and of the same effect and priority purported
     to be created thereby; or

         (j) a Change of Control shall occur; then, and in any such event, (A)
if such event is an Event of Default specified in clause (i) or (ii) of
paragraph (f) above with respect to the Borrower, automatically the Commitments
shall immediately terminate and the Loans hereunder (with accrued interest
thereon) and all other amounts owing under this Agreement and the other Loan
Documents (including all amounts of L/C Obligations, whether or not the
beneficiaries of the then outstanding Letters of Credit shall have presented the
documents required thereunder) shall immediately become due and payable, and (B)
if such event is any other Event of Default, either or both of the following
actions may be taken: (i) with the consent of the Required Lenders, the
Administrative Agent may, or upon the request of the Required Lenders, the
Administrative Agent shall, by notice to the Borrower declare the Tranche A Term
Commitments and the Revolving Commitments to be terminated forthwith, whereupon
the Tranche A Term Commitments and the Revolving Commitments shall immediately
terminate; and (ii) with the consent of the Required Lenders, the Administrative
Agent may, or upon the request of the Required Lenders, the Administrative Agent
shall, by notice to the Borrower, declare the Loans hereunder (with accrued
interest thereon) and all other amounts owing under this Agreement and the other
Loan Documents (including all amounts of L/C Obligations, whether or not the
beneficiaries of the then outstanding Letters of Credit shall have presented the
documents required thereunder) to be due and payable forthwith, whereupon the
same shall immediately become due and payable. With respect to all Letters of
Credit with respect to which presentment for honor shall not have occurred at
the time of an acceleration pursuant to this paragraph, the Borrower shall at
such time deposit in a cash collateral account opened by the Administrative
Agent an amount equal to the aggregate then undrawn and unexpired amount of such
Letters of Credit. Amounts held in such cash collateral account shall be applied
by the Administrative Agent to the payment of drafts drawn under such Letters of
Credit, and the unused portion thereof after all such Letters of Credit shall
have expired or been fully drawn upon, if any, shall be applied to repay other
obligations of the Borrower hereunder and under the other Loan Documents. After
all such Letters of Credit shall have expired or been fully drawn upon, all
Reimbursement Obligations shall have been satisfied and all other obligations of
the Borrower hereunder and under the other Loan Documents shall have been paid
in full, the balance, if any, in such cash collateral account shall be returned
to the Borrower (or such other
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                                                                              73

Person as may be lawfully entitled thereto). Except as expressly provided above
in this Section, presentment, demand, protest and all other notices of any kind
are hereby expressly waived by the Borrower.

                             SECTION 9. THE AGENTS

          9.1 Appointment. Each Lender hereby irrevocably designates and
appoints the Administrative Agent as the agent of such Lender under this
Agreement and the other Loan Documents, and each such Lender irrevocably
authorizes the Administrative Agent, in such capacity, to take such action on
its behalf under the provisions of this Agreement and the other Loan Documents
and to exercise such powers and perform such duties as are expressly delegated
to the Administrative Agent by the terms of this Agreement and the other Loan
Documents, together with such other powers as are reasonably incidental thereto.
Notwithstanding any provision to the contrary elsewhere in this Agreement, the
Administrative Agent shall not have any duties or responsibilities, except those
expressly set forth herein, or any fiduciary relationship with any Lender, and
no implied covenants, functions, responsibilities, duties, obligations or
liabilities shall be read into this Agreement or any other Loan Document or
otherwise exist against the Administrative Agent.

          9.2 Delegation of Duties. The Administrative Agent may execute any of
its duties under this Agreement and the other Loan Documents by or through
agents or attorneys-in-fact and shall be entitled to advice of counsel
concerning all matters pertaining to such duties. The Administrative Agent shall
not be responsible for the negligence or misconduct of any agents or attorneys
in-fact selected by it with reasonable care.

          9.3 Exculpatory Provisions. Neither any Agent nor any of their
respective officers, directors, employees, agents, attorneys-in-fact or
affiliates shall be (i) liable for any action lawfully taken or omitted to be
taken by it or such Person under or in connection with this Agreement or any
other Loan Document (except to the extent that any of the foregoing are found by
a final and nonappealable decision of a court of competent jurisdiction to have
resulted from its or such Person's own gross negligence or willful misconduct)
or (ii) responsible in any manner to any of the Lenders for any recitals,
statements, representations or warranties made by any Loan Party or any officer
thereof contained in this Agreement or any other Loan Document or in any
certificate, report, statement or other document referred to or provided for in,
or received by the Agents under or in connection with, this Agreement or any
other Loan Document or for the value, validity, effectiveness, genuineness,
enforceability or sufficiency of this Agreement or any other Loan Document or
for any failure of any Loan Party a party thereto to perform its obligations
hereunder or thereunder. The Agents shall not be under any obligation to any
Lender to ascertain or to inquire as to the observance or performance of any of
the agreements contained in, or conditions of, this Agreement or any other Loan
Document, or to inspect the properties, books or records of any Loan Party.

          9.4 Reliance by Administrative Agent. The Administrative Agent shall
be entitled to rely, and shall be fully protected in relying, upon any
instrument, writing, resolution, notice, consent, certificate, affidavit,
letter, telecopy, telex or teletype message, statement, order or other document
or conversation believed by it to be genuine and correct and to have been
signed, sent or made by the proper Person or Persons and upon advice and
statements of legal counsel (including counsel to Holdings or the Borrower),
independent accountants and other experts selected by the Administrative Agent.
The Administrative Agent may deem and treat the payee of any promissory note
evidencing Loans as the
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                                                                              74

owner thereof for all purposes unless a written notice of assignment,
negotiation or transfer thereof shall have been filed with the Administrative
Agent. The Administrative Agent shall be fully justified in failing or refusing
to take any action under this Agreement or any other Loan Document unless it
shall first receive such advice or concurrence of the Required Lenders (or, if
so specified by this Agreement, all Lenders) as it deems appropriate or it shall
first be indemnified to its satisfaction by the Lenders against any and all
liability and expense that may be incurred by it by reason of taking or
continuing to take any such action. The Administrative Agent shall in all cases
be fully protected in acting, or in refraining from acting, under this Agreement
and the other Loan Documents in accordance with a request of the Required
Lenders (or, if so specified by this Agreement, all Lenders), and such request
and any action taken or failure to act pursuant thereto shall be binding upon
all the Lenders and all future holders of the Loans.

          9.5 Notice of Default. The Administrative Agent shall not be deemed to
have knowledge or notice of the occurrence of any Default or Event of Default
hereunder unless the Administrative Agent has received notice from a Lender,
Holdings or the Borrower referring to this Agreement, describing such Default or
Event of Default and stating that such notice is a "notice of default". In the
event that the Administrative Agent receives such a notice, the Administrative
Agent shall give notice thereof to the Lenders. The Administrative Agent shall
take such action with respect to such Default or Event of Default as shall be
reasonably directed by the Required Lenders (or, if so specified by this
Agreement, all Lenders); provided that unless and until the Administrative Agent
shall have received such directions, the Administrative Agent may (but shall not
be obligated to) take such action, or refrain from taking such action, with
respect to such Default or Event of Default as it shall deem advisable in the
best interests of the Lenders.

          9.6 Non-Reliance on Agents and Other Lenders. Each Lender expressly
acknowledges that neither the Agents nor any of their respective officers,
directors, employees, agents, attorneys-in-fact or affiliates have made any
representations or warranties to it and that no act by any Agent hereafter
taken, including any review of the affairs of a Loan Party or any affiliate of a
Loan Party, shall be deemed to constitute any representation or warranty by any
Agent to any Lender. Each Lender represents to the Agents that it has,
independently and without reliance upon any Agent or any other Lender, and based
on such documents and information as it has deemed appropriate, made its own
appraisal of and investigation into the business, operations, property,
financial and other condition and creditworthiness of the Loan Parties and their
affiliates and made its own decision to make its Loans hereunder and enter into
this Agreement. Each Lender also represents that it will, independently and
without reliance upon any Agent or any other Lender, and based on such documents
and information as it shall deem appropriate at the time, continue to make its
own credit analysis, appraisals and decisions in taking or not taking action
under this Agreement and the other Loan Documents, and to make such
investigation as it deems necessary to inform itself as to the business,
operations, property, financial and other condition and creditworthiness of the
Loan Parties and their affiliates. Except for notices, reports and other
documents expressly required to be furnished to the Lenders by the
Administrative Agent hereunder, the Administrative Agent shall not have any duty
or responsibility to provide any Lender with any credit or other information
concerning the business, operations, property, condition (financial or
otherwise), prospects or creditworthiness of any Loan Party or any affiliate of
a Loan Party that may come into the possession of the Administrative Agent or
any of its officers, directors, employees, agents, attorneys-in-fact or
affiliates.
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                                                                              75

          9.7 Indemnification. The Lenders agree to indemnify each Agent in its
capacity as such (to the extent not reimbursed by Holdings or the Borrower and
without limiting the obligation of Holdings or the Borrower to do so), ratably
according to their respective Aggregate Exposure Percentages in effect on the
date on which indemnification is sought under this Section (or, if
indemnification is sought after the date upon which the Commitments shall have
terminated and the Loans shall have been paid in full, ratably in accordance
with such Aggregate Exposure Percentages immediately prior to such date), from
and against any and all liabilities, obligations, losses, damages, penalties,
actions, judgments, suits, costs, expenses or disbursements of any kind
whatsoever that may at any time (whether before or after the payment of the
Loans) be imposed on, incurred by or asserted against such Agent in any way
relating to or arising out of, the Commitments, this Agreement, any of the other
Loan Documents or any documents contemplated by or referred to herein or therein
or the transactions contemplated hereby or thereby or any action taken or
omitted by such Agent under or in connection with any of the foregoing; provided
that no Lender shall be liable for the payment of any portion of such
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses or disbursements that are found by a final and nonappealable
decision of a court of competent jurisdiction to have resulted from such Agent's
gross negligence or willful misconduct. The agreements in this Section shall
survive the payment of the Loans and all other amounts payable hereunder.

          9.8 Agent in Its Individual Capacity. Each Agent and its affiliates
may make loans to, accept deposits from and generally engage in any kind of
business with any Loan Party as though such Agent were not an Agent. With
respect to its Loans made or renewed by it and with respect to any Letter of
Credit issued or participated in by it, each Agent shall have the same rights
and powers under this Agreement and the other Loan Documents as any Lender and
may exercise the same as though it were not an Agent, and the terms "Lender" and
"Lenders" shall include each Agent in its individual capacity.

          9.9 Successor Administrative Agent. The Administrative Agent may
resign as Administrative Agent upon 10 days' notice to the Lenders and the
Borrower. If the Administrative Agent shall resign as Administrative Agent under
this Agreement and the other Loan Documents, then the Required Lenders shall
appoint from among the Lenders a successor agent for the Lenders, which
successor agent shall (unless an Event of Default under Section 8(a) or Section
8(f) with respect to the Borrower shall have occurred and be continuing) be
subject to approval by the Borrower (which approval shall not be unreasonably
withheld or delayed), whereupon such successor agent shall succeed to the
rights, powers and duties of the Administrative Agent, and the term
"Administrative Agent" shall mean such successor agent effective upon such
appointment and approval, and the former Administrative Agent's rights, powers
and duties as Administrative Agent shall be terminated, without any other or
further act or deed on the part of such former Administrative Agent or any of
the parties to this Agreement or any holders of the Loans. If no successor agent
has accepted appointment as Administrative Agent by the date that is 10 days
following a retiring Administrative Agent's notice of resignation, the retiring
Administrative Agent's resignation shall nevertheless thereupon become effective
and the Lenders shall assume and perform all of the duties of the Administrative
Agent hereunder until such time, if any, as the Required Lenders appoint a
successor agent as provided for above. After any retiring Administrative Agent's
resignation as Administrative Agent, the provisions of this Section 9 shall
inure to its benefit as to any actions taken or omitted to be taken by it while
it was Administrative Agent under this Agreement and the other Loan Documents.
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                                                                              76

          9.10 Documentation Agent and Syndication Agent. Neither the
Documentation Agent nor the Syndication Agents shall have any duties or
responsibilities hereunder in its capacity as such.

                           SECTION 10. MISCELLANEOUS

          10.1 Amendments and Waivers. Neither this Agreement, any other Loan
Document, nor any terms hereof or thereof may be amended, supplemented or
modified except in accordance with the provisions of this Section 10.1. The
Required Lenders and each Loan Party party to the relevant Loan Document may,
or, with the written consent of the Required Lenders, the Administrative Agent
and each Loan Party party to the relevant Loan Document may, from time to time,
(a) enter into written amendments, supplements or modifications hereto and to
the other Loan Documents for the purpose of adding any provisions to this
Agreement or the other Loan Documents or changing in any manner the rights of
the Lenders or of the Loan Parties hereunder or thereunder or (b) waive, on such
terms and conditions as the Required Lenders or the Administrative Agent, as the
case may be, may specify in such instrument, any of the requirements of this
Agreement or the other Loan Documents or any Default or Event of Default and its
consequences; provided, however, that no such waiver and no such amendment,
supplement or modification shall (i) forgive or reduce the principal amount or
extend the final scheduled date of maturity of any Loan, extend the scheduled
date of any amortization payment in respect of any Term Loan, extend the
scheduled date of any reduction of the Revolving Commitments, reduce the stated
rate of any interest or fee payable hereunder (except (x) in connection with the
waiver of applicability of any post-default increase in interest rates, which
waiver shall be effective with the consent of the Majority Facility Lenders of
each adversely affected Facility and (y) that any amendment or modification of
defined terms used in the financial covenants in this Agreement shall not
constitute a reduction in the rate of interest or fees for purposes of this
clause (i)) or extend the scheduled date of any payment thereof, or increase the
amount or extend the expiration date of any Lender's Commitment, in each case
without the written consent of each Lender directly affected thereby;
(ii) eliminate or reduce the voting rights of any Lender under this Section 10.1
without the written consent of such Lender; (iii) reduce any percentage
specified in the definition of Required Lenders, consent to the assignment or
transfer by the Borrower of any of its rights and obligations under this
Agreement and the other Loan Documents, release all or substantially all of the
Collateral or release all or substantially all of the Subsidiary Guarantors from
their obligations under the Guarantee and Collateral Agreement, in each case
without the written consent of all Lenders; (iv) amend, modify or waive any
condition precedent to any extension of credit under any Facility set forth in
Section 5.2 (including in connection with any waiver of an existing Default or
Event of Default) without the written consent of the Majority Facility Lenders
with respect to such Facility; provided that a waiver of any such condition
precedent relating to an existing Default or Event of Default under Section 8(a)
shall require the written consent of all Lenders; (v) reduce the amount of Net
Cash Proceeds or Excess Cash Flow required to be applied to prepay Loans under
this Agreement without the written consent of the Majority Facility Lenders with
respect to each adversely affected Facility; (vi) reduce the percentage
specified in the definition of Majority Facility Lenders with respect to any
Facility without the written consent of all Lenders under such Facility;
(vii) amend, modify or waive any provision of Section 9 without the written
consent of the Administrative Agent and any other Agent affected thereby;
(viii) amend, modify or waive any provision of Section 2.4 or 2.5 without the
written consent of the Swingline Lender; (ix) amend, modify or waive any
provision of Section 3 without the written consent of each affected Issuing
Lender or (x) amend, modify or waive any provision of Section 2.15(a), (b) or
(c) without the written consent of each Lender directly affected thereby. Any
such waiver and any such amendment, supplement or modification shall apply
equally to each of the Lenders and shall be binding upon the Loan Parties, the
Lenders, the Administrative Agent and all future
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                                                                              77

holders of the Loans. In the case of any waiver, the Loan Parties, the Lenders
and the Administrative Agent shall be restored to their former position and
rights hereunder and under the other Loan Documents, and any Default or Event of
Default waived shall be deemed to be cured and not continuing; but no such
waiver shall extend to any subsequent or other Default or Event of Default, or
impair any right consequent thereon.

          For the avoidance of doubt, this Agreement may be amended (or amended
and restated) with the written consent of the Required Lenders, the
Administrative Agent and the Borrower (a) to add one or more additional credit
facilities to this Agreement and to permit the extensions of credit from time to
time outstanding thereunder and the accrued interest and fees in respect thereof
(collectively, the "Additional Extensions of Credit") to share ratably in the
benefits of this Agreement and the other Loan Documents with the Term Loans and
Revolving Extensions of Credit and the accrued interest and fees in respect
thereof and (b) to include appropriately the Lenders holding such credit
facilities in any determination of the Required Lenders and Majority Facility
Lenders; provided, that no such amendment shall permit the Additional Extensions
of Credit to share ratably with or with preference to the Term Loans in the
application of mandatory prepayments without the consent of the Majority
Facility Lenders with respect to each Facility (other than the Revolving
Facility) or otherwise to share ratably with or with preference to the Revolving
Extensions of Credit without the consent of the Majority Facility Lenders with
respect to the Revolving Facility.

          10.2 Notices. All notices, requests and demands to or upon the
respective parties hereto to be effective shall be in writing (including by
telecopy), and, unless otherwise expressly provided herein, shall be deemed to
have been duly given or made when delivered, or three Business Days after being
deposited in the mail, postage prepaid, or, in the case of telecopy notice, when
received, addressed as follows in the case of Holdings, the Borrower and the
Administrative Agent, and as set forth in an administrative questionnaire
delivered to the Administrative Agent in the case of the Lenders, or to such
other address as may be hereafter notified by the respective parties hereto:

     Holdings:                 Crown Castle International Corp.
                               510 Bering Drive, Suite 500
                               Houston, Texas 77057
                               Attention: Treasurer and General Counsel
                               Telecopy: (713) 570-3150
                               Telephone: (713) 570-3000

     The Borrower:             Crown Castle Operating Company
                               510 Bering Drive, Suite 500
                               Houston, Texas 77057
                               Attention: Treasurer and General Counsel
                               Telecopy: (713) 570-3150
                               Telephone: (713) 570-3000

     The Administrative Agent: The Chase Manhattan Bank
                               270 Park Avenue
                               New York, New York 10017
                               Attention: Constance Coleman
                               Telecopy: (212) 270-1263
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                                                                              78

                               Telephone: (212) 270-0372

provided that any notice, request or demand to or upon the Administrative Agent
or the Lenders shall not be effective until received.

          10.3 No Waiver; Cumulative Remedies. No failure to exercise and no
delay in exercising, on the part of the Administrative Agent or any Lender, any
right, remedy, power or privilege hereunder or under the other Loan Documents
shall operate as a waiver thereof; nor shall any single or partial exercise of
any right, remedy, power or privilege hereunder preclude any other or further
exercise thereof or the exercise of any other right, remedy, power or privilege.
The rights, remedies, powers and privileges herein provided are cumulative and
not exclusive of any rights, remedies, powers and privileges provided by law.

          10.4 Survival of Representations and Warranties. All representations
and warranties made hereunder, in the other Loan Documents and in any document,
certificate or statement delivered pursuant hereto or in connection herewith
shall survive the execution and delivery of this Agreement and the making of the
Loans and other extensions of credit hereunder.

          10.5 Payment of Expenses and Taxes. The Borrower agrees (a) to pay or
reimburse the Administrative Agent for all its out-of-pocket costs and expenses
incurred in connection with the development, preparation and execution of, and
any amendment, supplement or modification to, this Agreement and the other Loan
Documents and any other documents prepared in connection herewith or therewith,
and the consummation and administration of the transactions contemplated hereby
and thereby, including the reasonable fees and disbursements of counsel to the
Administrative Agent and filing and recording fees and expenses, with statements
with respect to the foregoing to be submitted to the Borrower prior to the
Closing Date (in the case of amounts to be paid on the Closing Date) and from
time to time thereafter on a quarterly basis or such other periodic basis as the
Administrative Agent shall deem appropriate, (b) to pay or reimburse each Lender
and the Administrative Agent for all its costs and expenses incurred in
connection with the enforcement or preservation of any rights under this
Agreement, the other Loan Documents and any such other documents, including the
fees and disbursements of counsel to each Lender and of counsel to the
Administrative Agent, (c) to pay, indemnify, and hold each Lender and the
Administrative Agent harmless from, any and all recording and filing fees and
any and all liabilities with respect to, or resulting from any delay in paying,
stamp, excise and other taxes, if any, that may be payable or determined to be
payable in connection with the execution and delivery of, or consummation or
administration of any of the transactions contemplated by, or any amendment,
supplement or modification of, or any waiver or consent under or in respect of,
this Agreement, the other Loan Documents and any such other documents, and
(d) to pay, indemnify, and hold each Lender and the Administrative Agent and
their respective officers, directors, employees, affiliates, agents, trustees
and investment advisers and controlling persons (each, an "Indemnitee") harmless
from and against any and all other liabilities, obligations, losses, damages,
penalties, actions, judgments, suits, costs, expenses or disbursements of any
kind or nature whatsoever with respect to the execution, delivery, enforcement,
performance and administration of this Agreement, the other Loan Documents and
any such other documents, including any of the foregoing relating to the use of
proceeds of the Loans or the violation of, noncompliance with or liability
under, any Environmental Law applicable to the operations of Holdings, the
Borrower any of its Subsidiaries or any of the Properties and the reasonable
fees and expenses of legal counsel in connection with claims, actions or
proceedings by any Indemnitee against any Loan Party under any Loan Document
(all the foregoing in this clause (d), collectively, the "Indemnified
Liabilities"),
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                                                                              79

provided, that the Borrower shall have no obligation hereunder to any Indemnitee
with respect to Indemnified Liabilities to the extent such Indemnified
Liabilities are found by a final and nonappealable decision of a court of
competent jurisdiction to have resulted from the gross negligence or willful
misconduct of such Indemnitee. Without limiting the foregoing, and to the extent
permitted by applicable law, the Borrower agrees not to assert and to cause its
Subsidiaries not to assert, and hereby waives and agrees to cause its
Subsidiaries to waive, all rights for contribution or any other rights of
recovery with respect to all claims, demands, penalties, fines, liabilities,
settlements, damages, costs and expenses of whatever kind or nature, under or
related to Environmental Laws, that any of them might have by statute or
otherwise against any Indemnitee. All amounts due under this Section 10.5 shall
be payable not later than 10 days after written demand therefor. Statements
payable by the Borrower pursuant to this Section 10.5 shall be submitted to
Treasurer and General Counsel (Telephone No. (713) 570-3000) (Telecopy No. (713)
570-3150), at the address of the Borrower set forth in Section 10.2, or to such
other Person or address as may be hereafter designated by the Borrower in a
written notice to the Administrative Agent. The agreements in this Section 10.5
shall survive repayment of the Loans and all other amounts payable hereunder.

          It is understood and agreed that, to the extent not precluded by a
conflict of interest, each Indemnitee shall endeavor to work cooperatively with
the Borrower with a view to minimizing the legal and other expenses associated
with any defense and any potential settlement or judgment. To the extent
reasonably practicable and not disadvantageous to any Indemnitee, it is
anticipated that a single counsel may be used. Settlement of any claim or
litigation involving any material indemnified amount will require the approval
of the Borrower (not to be unreasonably withheld).

          10.6 Successors and Assigns; Participations and Assignments. (a) This
Agreement shall be binding upon and inure to the benefit of Holdings, the
Borrower, the Lenders, the Administrative Agent, all future holders of the Loans
and their respective successors and assigns, except that the Borrower may not
assign or transfer any of its rights or obligations under this Agreement without
the prior written consent of each Lender.

          (b) Any Lender other than any Conduit Lender may, without the consent
of the Borrower, in accordance with applicable law, at any time sell to one or
more banks, financial institutions or other entities (each, a "Participant")
participating interests in any Loan owing to such Lender, any Commitment of such
Lender or any other interest of such Lender hereunder and under the other Loan
Documents. In the event of any such sale by a Lender of a participating interest
to a Participant, such Lender's obligations under this Agreement to the other
parties to this Agreement shall remain unchanged, such Lender shall remain
solely responsible for the performance thereof, such Lender shall remain the
holder of any such Loan for all purposes under this Agreement and the other Loan
Documents, and the Borrower and the Administrative Agent shall continue to deal
solely and directly with such Lender in connection with such Lender's rights and
obligations under this Agreement and the other Loan Documents. In no event shall
any Participant under any such participation have any right to approve any
amendment or waiver of any provision of any Loan Document, or any consent to any
departure by any Loan Party therefrom, except to the extent that such amendment,
waiver or consent would reduce the principal of, or interest on, the Loans or
any fees payable hereunder, or postpone the date of the final maturity of the
Loans, in each case to the extent subject to such participation. The Borrower
agrees that if amounts outstanding under this Agreement and the Loans are due or
unpaid, or shall have been declared or shall have become due and payable upon
the occurrence of an Event of Default, each Participant shall, to the maximum
extent permitted by applicable law, be deemed to have the right of
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                                                                              80

setoff in respect of its participating interest in amounts owing under this
Agreement to the same extent as if the amount of its participating interest were
owing directly to it as a Lender under this Agreement, provided that, in
purchasing such participating interest, such Participant shall be deemed to have
agreed to share with the Lenders the proceeds thereof as provided in Section
10.7(a) as fully as if it were a Lender hereunder. The Borrower also agrees that
each Participant shall be entitled to the benefits of Sections 2.16, 2.17 and
2.18 with respect to its participation in the Commitments and the Loans
outstanding from time to time as if it was a Lender; provided that, in the case
of Section 2.17, such Participant shall have complied with the requirements of
said Section and provided, further, that no Participant shall be entitled to
receive any greater amount pursuant to any such Section than the transferor
Lender would have been entitled to receive in respect of the amount of the
participation transferred by such transferor Lender to such Participant had no
such transfer occurred.

          (c) Any Lender other than any Conduit Lender (an "Assignor") may, in
accordance with applicable law, at any time and from time to time assign to any
Lender, any affiliate of any Lender or any Approved Fund (unless, in the case of
assignments of Revolving Commitments, such Lender, affiliate or Approved Fund is
not already a holder of Revolving Commitments) or, with the consent of the
Borrower and the Administrative Agent (which, in each case, shall not be
unreasonably withheld or delayed), to an additional bank, financial institution
or other entity (an "Assignee") all or any part of its rights and obligations
under this Agreement and the other Loan Documents pursuant to an Assignment and
Acceptance, executed by such Assignee, such Assignor and any other Person whose
consent is required pursuant to this paragraph, and delivered to the
Administrative Agent for its acceptance and recording in the Register; provided
that no such assignment to an Assignee (other than any Lender, any affiliate of
any Lender or any Approved Fund) shall be in an aggregate principal amount of
less than $1,000,000 (or, in the case of the Tranche A Term Facility and the
Revolving Facility, $5,000,000) (other than in the case of an assignment of all
of a Lender's interests under this Agreement), unless otherwise agreed by the
Borrower and the Administrative Agent. For purposes of the proviso contained in
the preceding sentence, the amount described therein shall be aggregated in
respect of each Lender and its related Approved Funds, if any. Any such
assignment need not be ratable as among the Facilities. Upon such execution,
delivery, acceptance and recording, from and after the effective date determined
pursuant to such Assignment and Acceptance, (x) the Assignee thereunder shall be
a party hereto and, to the extent provided in such Assignment and Acceptance,
have the rights and obligations of a Lender hereunder with a Commitment and/or
Loans as set forth therein, and (y) the Assignor thereunder shall, to the extent
provided in such Assignment and Acceptance, be released from its obligations
under this Agreement (and, in the case of an Assignment and Acceptance covering
all of an Assignor's rights and obligations under this Agreement, such Assignor
shall cease to be a party hereto). Notwithstanding any provision of this Section
10.6, the consent of the Borrower shall not be required for any assignment that
occurs when an Event of Default shall have occurred and be continuing with
respect to the Borrower. Notwithstanding the foregoing, any Conduit Lender may
assign at any time to its designating Lender hereunder without the consent of
the Borrower or the Administrative Agent any or all of the Loans it may have
funded hereunder and pursuant to its designation agreement and without regard to
the limitations set forth in the first sentence of this Section 10.6(c).

          (d) The Administrative Agent shall, on behalf of the Borrower,
maintain at its address referred to in Section 10.2 a copy of each Assignment
and Acceptance delivered to it and a register (the "Register") for the
recordation of the names and addresses of the Lenders and the Commitment of, and
the principal amount of the Loans owing to, each Lender from time to time. The
entries in the Register shall be conclusive, in the absence of manifest error,
and the Borrower, each other Loan Party, the

<PAGE>

                                                                              81


Administrative Agent and the Lenders shall treat each Person whose name is
recorded in the Register as the owner of the Loans and any promissory note
evidencing Loans recorded therein for all purposes of this Agreement. Any
assignment of any Loan, whether or not evidenced by a promissory note (other
than any assignment to a Federal Reserve Bank pursuant to Section 10.6(f)),
shall be effective only upon appropriate entries with respect thereto being made
in the Register (and each promissory note shall expressly so provide). Any
assignment or transfer of all or part of a Loan evidenced by a promissory note
shall be registered on the Register only upon surrender for registration of
assignment or transfer of the promissory note evidencing such Loan, accompanied
by a duly executed Assignment and Acceptance, and thereupon one or more new
promissory notes shall be issued to the designated Assignee.

          (e) Upon its receipt of an Assignment and Acceptance executed by an
Assignor, an Assignee and any other Person whose consent is required by Section
10.6(c), together with payment to the Administrative Agent of a registration and
processing fee of $3,500 (except that no such registration and processing fee
shall be payable in the case of an Assignee which is an Approved Fund of the
relevant Assignor), the Administrative Agent shall (i) promptly accept such
Assignment and Acceptance and (ii) record the information contained therein in
the Register on the effective date determined pursuant thereto.

          (f) For avoidance of doubt, the parties to this Agreement acknowledge
that the provisions of this Section 10.6 concerning assignments relate only to
absolute assignments and that such provisions do not prohibit assignments
creating security interests, including any pledge or assignment by a Lender to
any Federal Reserve Bank in accordance with applicable law.

          (g) The Borrower, upon receipt of written notice from the relevant
Lender, agrees to issue a promissory note to any Lender requiring such note to
facilitate transactions of the type described in paragraph (f) above.

          (h) Each of Holdings, the Borrower, each Lender and the Administrative
Agent hereby confirms that it will not institute against a Conduit Lender or
join any other Person in instituting against a Conduit Lender any bankruptcy,
reorganization, arrangement, insolvency or liquidation proceeding under any
state bankruptcy or similar law, for one year and one day after the payment in
full of the latest maturing commercial paper note issued by such Conduit Lender;
provided, however, that each Lender designating any Conduit Lender hereby agrees
to indemnify, save and hold harmless each other party hereto for any loss, cost,
damage or expense arising out of its inability to institute such a proceeding
against such Conduit Lender during such period of forbearance.

          10.7 Adjustments; Set-off. (a) Except to the extent that this
Agreement expressly provides for payments to be allocated to a particular Lender
or to the Lenders under a particular Facility, if any Lender (a "Benefitted
Lender") shall, at any time after the Loans and other amounts payable hereunder
shall immediately become due and payable pursuant to Section 8, receive any
payment of all or part of the Obligations owing to it, or receive any collateral
in respect thereof (whether voluntarily or involuntarily, by set-off, pursuant
to events or proceedings of the nature referred to in Section 8(f), or
otherwise), in a greater proportion than any such payment to or collateral
received by any other Lender, if any, in respect of the Obligations owing to
such other Lender, such Benefitted Lender shall purchase for cash from the other
Lenders a participating interest in such portion of the Obligations owing to
each such other Lender, or shall provide such other Lenders with the benefits of
any such collateral, as shall be necessary to cause such Benefitted Lender to
share the excess payment or benefits of such collateral ratably with each of the
Lenders; provided, however, that if all or any portion of such excess payment or
<PAGE>

                                                                              82

benefits is thereafter recovered from such Benefitted Lender, such purchase
shall be rescinded, and the purchase price and benefits returned, to the extent
of such recovery, but without interest.

          (b) In addition to any rights and remedies of the Lenders provided by
law, each Lender shall have the right, without prior notice to Holdings or the
Borrower, any such notice being expressly waived by Holdings and the Borrower to
the extent permitted by applicable law, upon any amount becoming due and payable
by Holdings or the Borrower hereunder (whether at the stated maturity, by
acceleration or otherwise), to set off and appropriate and apply against such
amount any and all deposits (general or special, time or demand, provisional or
final), in any currency, and any other credits, indebtedness or claims, in any
currency, in each case whether direct or indirect, absolute or contingent,
matured or unmatured, at any time held or owing by such Lender or any branch or
agency thereof to or for the credit or the account of Holdings or the Borrower,
as the case may be. Each Lender agrees promptly to notify the Borrower and the
Administrative Agent after any such setoff and application made by such Lender,
provided that the failure to give such notice shall not affect the validity of
such setoff and application.

          10.8 Counterparts. This Agreement may be executed by one or more of
the parties to this Agreement on any number of separate counterparts, and all of
said counterparts taken together shall be deemed to constitute one and the same
instrument. Delivery of an executed signature page of this Agreement by
facsimile transmission shall be effective as delivery of a manually executed
counterpart hereof. A set of the copies of this Agreement signed by all the
parties shall be lodged with the Borrower and the Administrative Agent.

          10.9 Severability. Any provision of this Agreement that is prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

          10.10 Integration. This Agreement and the other Loan Documents
represent the entire agreement of Holdings, the Borrower, the Administrative
Agent and the Lenders with respect to the subject matter hereof and thereof, and
there are no promises, undertakings, representations or warranties by the
Administrative Agent or any Lender relative to the subject matter hereof not
expressly set forth or referred to herein or in the other Loan Documents.

          10.11 GOVERNING LAW. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF
THE PARTIES UNDER THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND
INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

          10.12 Submission To Jurisdiction; Waivers. Each of Holdings and the
Borrower hereby irrevocably and unconditionally:

          (a) submits for itself and its property in any legal action or
          proceeding relating to this Agreement and the other Loan Documents to
          which it is a party, or for recognition and enforcement of any
          judgment in respect thereof, to the non-exclusive general jurisdiction
          of the
<PAGE>

                                                                              83

       courts of the State of New York, the courts of the United States for the
       Southern District of New York, and appellate courts from any thereof;

         (b) consents that any such action or proceeding may be brought in such
     courts and waives any objection that it may now or hereafter have to the
     venue of any such action or proceeding in any such court or that such
     action or proceeding was brought in an inconvenient court and agrees not to
     plead or claim the same;

         (c) agrees that service of process in any such action or proceeding may
     be effected by mailing a copy thereof by registered or certified mail (or
     any substantially similar form of mail), postage prepaid, to Holdings or
     the Borrower, as the case may be at its address set forth in Section 10.2
     or at such other address of which the Administrative Agent shall have been
     notified pursuant thereto;

         (d) agrees that nothing herein shall affect the right to effect service
     of process in any other manner permitted by law or shall limit the right to
     sue in any other jurisdiction; and

         (e) waives, to the maximum extent not prohibited by law, any right it
     may have to claim or recover in any legal action or proceeding referred to
     in this Section any special, exemplary, punitive or consequential damages.

     10.13 Acknowledgements. Each of Holdings and the Borrower hereby
acknowledges that:

         (a) it has been advised by counsel in the negotiation, execution and
     delivery of this Agreement and the other Loan Documents;

         (b) neither the Administrative Agent nor any Lender has any fiduciary
     relationship with or duty to Holdings or the Borrower arising out of or in
     connection with this Agreement or any of the other Loan Documents, and the
     relationship between Administrative Agent and Lenders, on one hand, and
     Holdings and the Borrower, on the other hand, in connection herewith or
     therewith is solely that of debtor and creditor; and

         (c) no joint venture is created hereby or by the other Loan Documents
     or otherwise exists by virtue of the transactions contemplated hereby among
     the Lenders or among Holdings, the Borrower and the Lenders.

          10.14 Releases of Guarantees and Liens. (a) Notwithstanding anything
to the contrary contained herein or in any other Loan Document, the
Administrative Agent is hereby irrevocably authorized by each Lender (without
requirement of notice to or consent of any Lender except as expressly required
by Section 10.1) to take any action requested by the Borrower having the effect
of releasing any Collateral or Guarantee Obligations (i) to the extent necessary
to permit consummation of any transaction not prohibited by any Loan Document or
that has been consented to in accordance with Section 10.1 or (ii) under the
circumstances described in paragraph (b) below.

         (b) At such time as the Loans, the Reimbursement Obligations and the
     other obligations under the Loan Documents (other than obligations under or
     in respect of Hedge Agreements) shall have
<PAGE>

                                                                              84

been paid in full, the Commitments have been terminated and no Letters of Credit
shall be outstanding, the Collateral shall be released from the Liens created by
the Security Documents, and the Security Documents and all obligations (other
than those expressly stated to survive such termination) of the Administrative
Agent and each Loan Party under the Security Documents shall terminate, all
without delivery of any instrument or performance of any act by any Person.

          10.15 Confidentiality. Each of the Administrative Agent and each
Lender agrees to keep confidential all non-public information provided to it by
any Loan Party pursuant to this Agreement that is designated by such Loan Party
as confidential; provided that nothing herein shall prevent the Administrative
Agent or any Lender from disclosing any such information (a) to the
Administrative Agent, any other Lender, any affiliate of any Lender or any
Approved Fund, (b) to any (i) actual or prospective Transferee, (ii) Hedge
Agreement counterparty or (iii) direct or indirect contractual counterparty in
swap agreements (or such contractual counterparty's professional advisor), in
each case that agrees to comply with the provisions of this Section, (c) to its
employees, directors, agents, attorneys, accountants and other professional
advisors or those of any of its affiliates, (d) upon the request or demand of
any Governmental Authority, (e) in response to any order of any court or other
Governmental Authority or as may otherwise be required pursuant to any
Requirement of Law, (f) if requested or required to do so in connection with any
litigation or similar proceeding, (g) that has been publicly disclosed, (h) to
the National Association of Insurance Commissioners or any similar organization
or any nationally recognized rating agency that requires access to information
about a Lender's investment portfolio in connection with ratings issued with
respect to such Lender, or (i) in connection with the exercise of any remedy
hereunder or under any other Loan Document.

          10.16 WAIVERS OF JURY TRIAL. HOLDINGS, THE BORROWER, THE
ADMINISTRATIVE AGENT AND THE LENDERS HEREBY IRREVOCABLY AND UNCONDITIONALLY
WAIVE TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING TO THIS AGREEMENT
OR ANY OTHER LOAN DOCUMENT AND FOR ANY COUNTERCLAIM THEREIN.
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and delivered by their proper and duly authorized officers as of
the day and year first above written.



                                        CROWN CASTLE INTERNATIONAL CORP.


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:



                                        CROWN CASTLE OPERATING COMPANY


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        THE CHASE MANHATTAN BANK, as
                                        Administrative Agent and as a Lender

                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        CREDIT SUISSE FIRST BOSTON CORPORATION,
                                        as Syndication Agent


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:

                                        CREDIT SUISSE FIRST BOSTON, as a Lender


                                        By:
                                           ---------------------------------
                                           Name:
                                           Title:



<PAGE>

                                     KEY CORPORATE CAPITAL INC., as Syndication
                                     Agent and as a Lender



                                     By:
                                        --------------------------------------
                                        Name:
                                        Title:



                                     THE BANK OF NOVA SCOTIA, as Documentation
                                     Agent and as a Lender


                                     By:
                                        --------------------------------------
                                        Name:
                                        Title:


                                     BANK OF NEW YORK


                                     By:
                                        --------------------------------------
                                        Name:
                                        Title:


                                     PNC BANK, NATIONAL ASSOCIATION


                                     By:
                                        --------------------------------------
                                        Name:
                                        Title:


                                     ROYAL BANK OF CANADA


                                     By:
                                        --------------------------------------
                                        Name:
                                        Title:

<PAGE>

                                        UNION BANK OF CALIFORNIA


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:



                                        BANK OF MONTREAL


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:



                                        CREDIT LYONNAIS NEW YORK BRANCH


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        COOPERATIVE CENTRALE RAIFFEISEN-
                                        BOERENLEEN BANK B.A., "RABOBANK
                                        INTERNATIONAL", NEW YORK BRANCH


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:
<PAGE>

                                        ROYAL BANK OF SCOTLAND


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:



                                        MEESPIERSON CAPITAL CORP.

                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:



                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        COBANK, ACB

                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        CREDIT INDUSTRIEL ET COMMERCIAL

                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        SUNTRUST BANKS, INC.

                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:
<PAGE>

                                        WACHOVIA BANK


                                        By:
                                           ----------------------------------
                                            Name:
                                            Title:


                                        FLEETBOSTON


                                        By:
                                           ----------------------------------
                                            Name:
                                            Title:


                                        IBM CREDIT CORPORATION

                                        By:
                                           ----------------------------------
                                            Name:
                                            Title:

                                        ARAB BANKING CORPORATION


                                        By:
                                           ----------------------------------
                                            Name:
                                            Title:


                                        THE CIT GROUP/EQUIPMENT FINANCING INC.

                                        By:
                                           ----------------------------------
                                            Name:
                                            Title:
<PAGE>

                                        DAI ICHI KANGYO BANK


                                        By:
                                           -----------------------------------
                                            Name:
                                            Title:


                                        ERSTE BANK

                                        By:
                                           -----------------------------------
                                            Name:
                                            Title:


                                        MERCANTILE BANK NATIONAL ASSOCIATION


                                        By:
                                           -----------------------------------
                                            Name:
                                            Title:


                                        THE MITSUBISHI TRUST AND BANKING
                                        CORPORATION

                                        By:
                                           -----------------------------------
                                            Name:
                                            Title:


                                        SUMMIT BANK

                                        By:
                                           -----------------------------------
                                            Name:
                                            Title:


<PAGE>

                                    NUVEEN FLOATING RATE FUND

                                    By: Nuveen Senior Loan Asset Management Inc.

                                    By:
                                       ---------------------------------------
                                       Name:
                                       Title:



                                    NUVEEN SENIOR INCOME FUND

                                    By: Nuveen Senior Loan Asset Management Inc.

                                    By:
                                        ---------------------------------------
                                        Name:
                                        Title:



                                    GOLDMAN SACHS CREDIT PARTNERS L.P.


                                    By:
                                        ---------------------------------------
                                        Name:
                                        Title:


                                    EATON VANCE MANAGEMENT INC.


                                    By:
                                        ---------------------------------------
                                        Name:
                                        Title:


                                    MERRILL LYNCH


                                    By:
                                        ---------------------------------------
                                        Name:
                                        Title:



<PAGE>

                                        VAN KAMPEN AMERICAN CAPITAL


                                        By:
                                            ---------------------------------
                                             Name:
                                             Title:


                                        FRANKLIN FLOATING RATE TRUST

                                        By:
                                            ---------------------------------
                                             Name:
                                             Title:


                                        PACIFIC INVESTMENT MANAGEMENT


                                        By:
                                            ---------------------------------
                                             Name:
                                             Title:


                                        ING CAPITAL ADVISORS


                                        By:
                                            ---------------------------------
                                             Name:
                                             Title:


                                        PILGRIM PRIME RATE TRUST


                                        By:
                                            ---------------------------------
                                             Name:
                                             Title:

<PAGE>

                                        MORGAN STANLEY DEAN WITTER PRIME
                                         INCOME TRUST


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        STANFIELD CAPITAL PARTNERS


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        FIRST DOMINION CAPITAL


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        APPALOOSA MANAGEMENT, L.P.


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:


                                        SUNAMERICA CORPORATE FINANCE


                                        By:
                                           ----------------------------------
                                           Name:
                                           Title:

<PAGE>

                                        APOLLO ADVISORS

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        TRUST COMPANY OF THE WEST

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        MASSACHUSETTS MUTUAL LIFE

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        PUTNAM INVESTMENTS

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        BAIN

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------
<PAGE>

                                        METROPOLITAN PROPERTY AND CASUALTY
                                        INSURANCE COMPANY

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        OAK HILL

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        INVESCO

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        CITIBANK GLOBAL ASSET MANAGEMENT

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        ARCHIMEDES FUNDING II-LTD
                                        By: ING Capital Advisors LLC, as
                                            Collateral Manager

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------



<PAGE>

                                        ARCHIMEDES FUNDING III-LTD
                                        By: ING Capital Advisors LLC, as
                                            Collateral Manager

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        SWISS LIFE US RAINBOW LIMITED
                                        By: ING Capital Advisors LLC, as
                                            Investment Advisor

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        OCTAGON CREDIT INVESTORS

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KEMPER FLOATING RATE FUND

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        PPM AMERICA INCORPORATED

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------
<PAGE>

                                        FC CBP LTD. (BANK OF MONTREAL)

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        THE TRAVELERS INSURANCE COMPANY

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        TRAVELERS CORPORATE LOAN FUND INC.
                                        By: Travelers Asset Management
                                            International Company LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        ALLSTATE INSURANCE

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        CARAVELLE ADVISORS LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------



<PAGE>

                                        INSTITUTIONAL DEBT MANAGEMENT

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        SHENKMAN CAPITAL

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        STEIN ROE FARNHAM, INC.

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        STERLING ASSET MANAGEMENT

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        CANADIAN INPERIAL BANK OF COMMERCE

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------

<PAGE>

                                        HELLER FINANCIAL

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        NEW YORK LIFE INSURANCE AND ANNUITY
                                        CORPORATION

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        OPPENHEIMER SENIOR FLOATING RATE FUND

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH RIVERSIDE LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH SOLEIL LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------



<PAGE>

                                        KZH SOLEIL-2 LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH CRESCENT LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH CRESCENT-3 LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH LANGDALE LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        BALANCED HIGH YIELD FUND II

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------

<PAGE>

                                        IMPERIAL CREDIT INDUSTRIES

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KATONAH CAPITAL

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        NOMURA

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH ING-1 LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH ING-2 LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------

<PAGE>

                                        KZH ING-3 LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH III LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH SHOSHONE LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        KZH STERLING LLC

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------


                                        GALAXY CLO 1999-1, LTD

                                        By:
                                           --------------------------
                                        Name:
                                             ------------------------
                                        Title:
                                              -----------------------



<PAGE>

                                                                   EXHIBIT 10.37

                                                                  CONFORMED COPY
                                                                  --------------

                           DATE: 23RD DECEMBER, 1999


                            CROWN CASTLE UK LIMITED
                                  AS BORROWER

                       CROWN CASTLE UK HOLDINGS LIMITED
                                      AND
                       MILLENNIUM COMMUNICATIONS LIMITED
                                 AS GUARANTORS

                       THE LENDERS LISTED IN SCHEDULE 1

                          CREDIT SUISSE FIRST BOSTON
                                   AS AGENT



               ------------------------------------------------
                           LOAN AMENDMENT AGREEMENT
               ------------------------------------------------






                               SLAUGHTER AND MAY
                             35 BASINGHALL STREET
                                    LONDON
                                   EC2V 5DB

                                   (AGB/HZM)
<PAGE>

                           LOAN AMENDMENT AGREEMENT

DATE: 23rd December, 1999

PARTIES

1.   CROWN CASTLE UK LIMITED (formerly known as Castle Transmission
     International Ltd.), a company incorporated in England (number 3196207), of
     Warwick Technology Park, Gallows Hill, Heathcote Lane, Warwick CV34 6TN, as
     borrower

2.   CROWN CASTLE UK HOLDINGS LIMITED (formerly known as Castle Transmission
     Services (Holdings) Ltd.), a company incorporated in England (number
     3242381), of Warwick Technology Park, Gallows Hill, Heathcote Lane, Warwick
     CV34 6TN and MILLENNIUM COMMUNICATIONS LIMITED, a company incorporated in
     England (number 2903056), of Warwick Technology Park, Gallows Hill,
     Heathcote Lane, Warwick CV34 6TN, as guarantors

3.   CREDIT SUISSE FIRST BOSTON, for itself and as agent for the Lenders (the
     "Agent")

BACKGROUND

(A)  On 28th February, 1997 the loan agreement was entered into between the
     Borrower, the Parent, certain lenders, the Agent and others and under its
     terms the lenders agreed to provide term and revolving loan facilities of
     (Pounds)162,500,000 to the Borrower.  On 21st May, 1997 the parties to the
     loan agreement at that date amended the loan agreement so that the lenders
     under it agreed to provide revolving loan facilities of (Pounds)64,000,000
     to the Borrower.  These loan facilities are guaranteed by the Parent and
     secured by charges granted by the Borrower and the Parent.  With effect
     from 27th October, 1998 Millennium acceded to the loan agreement as an
     additional guarantor and acceded to the Debenture as an additional chargor.
     The loan agreement was further amended on 18th June, 1999, amongst other
     things, from a (Pounds)64,000,000 revolving loan facility to a
     (Pounds)150,000,000 term and revolving loan facility.

(B)  At the request of the Borrower the parties have agreed to amend the terms
     of the Loan Agreement on the terms of this Agreement.

(C)  The Agent has been authorised by an Instructing Group to agree to the
     amendments contained in this Agreement.

The parties agree as follows:

1.   INTERPRETATION

1.1  Loan Agreement

     The interpretation provisions contained in Part I of the Loan Agreement are
     deemed to be incorporated expressly in this Agreement, and apply to this
     Agreement accordingly.
<PAGE>

1.2  Definition

     In this Agreement "Loan Agreement" means the loan agreement dated 28th
     February, 1997 as amended on 21st May, 1997, acceded to by Millennium with
     effect from 27th October, 1998 and as further amended on 18th June, 1999
     made between the Borrower, the Parent, Millennium, the Lenders, Credit
     Suisse First Boston and others under which the Lenders have agreed to
     provide (Pounds)150,000,000 term and revolving loan facilities to the
     Borrower.

1.3  Scope

     This Agreement is supplemental to and amends the Loan Agreement.

2.   AMENDMENT OF THE LOAN AGREEMENT

     The parties agree that the Loan Agreement shall be amended with effect from
     the date of this Agreement so that the reference in each of Clauses
     20.1(EE), 21.1(L)(iii)(b) and 21.1(M)(iii)(b) to "16th July, 1999" shall be
     replaced by a reference in each of these Clauses to "31st December, 1999".

3.   MISCELLANEOUS

3.1  Law

     This Agreement is to be governed by and construed in accordance with
     English law.

3.2  Counterparts

     There may be several signed copies of this Agreement.  There is intended to
     be a single Agreement and each signed copy is a counterpart of that
     Agreement.
<PAGE>

                                  SIGNATURES

Borrower

CROWN CASTLE UK LIMITED

By:


Parent and Guarantor

CROWN CASTLE UK HOLDINGS LIMITED

By:


Additional Guarantor

MILLENNIUM COMMUNICATIONS LIMITED

By:


Agent

CREDIT SUISSE FIRST BOSTON

By:

<PAGE>

                                                                      EXHIBIT 11

                       CROWN CASTLE INTERNATIONAL CORP.

                            COMPUTATION OF NET LOSS
                               PER COMMON SHARE
              (IN THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>

                                                           YEARS ENDED DECEMBER 31,
                                         ---------------------------------------------------------
                                           1995        1996         1997        1998        1999
                                         --------    --------     --------    --------    --------
<S>                                       <C>          <C>          <C>         <C>         <C>
Loss before cumulative effect
 of change in accounting
 principle..........................     $   (21)    $  (957)     $(11,942)   $(37,775)  $ (94,347)
Dividends on preferred stock........          --          --        (2,199)     (5,411)    (28,881)
                                         -------     -------      --------    --------   ---------

Loss before cumulative effect of
 change in accounting principle
 applicable to common stock for
 basic and diluted computations.....         (21)       (957)      (14,141)    (43,186)   (123,228)

Cumulative effect of change in
 accounting principle...............          --          --            --          --      (2,414)
                                         -------     -------      --------    --------   ---------
Net loss applicable to common
 stock for basic and
 diluted computations...............     $   (21)    $  (957)     $(14,141)   $(43,186)  $(125,642)
                                         =======     =======      ========    ========   =========

Weighted-average number of
 common shares outstanding
 during the period for basic
 and diluted computations
 (in thousands).....................       3,316       3,503         6,238      42,518     131,466
                                         =======     =======      ========    ========   =========

Per common share--basic and
 diluted:
  Loss before cumulative effect of
   change in accounting principle...     $ (0.01)    $ (0.27)     $  (2.27)   $  (1.02)  $   (0.94)

Cumulative effect of change in
 accounting principle...............          --          --            --          --       (0.02)
                                         -------     -------      --------    --------   ---------
   Net loss.........................     $ (0.01)    $ (0.27)     $  (2.27)   $  (1.02)  $   (0.96)
                                         =======     =======      ========    ========   =========
</TABLE>


<PAGE>

                                                                      EXHIBIT 12

                       CROWN CASTLE INTERNATIONAL CORP.
            COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND
       EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS
                            (DOLLARS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                            YEARS ENDED DECEMBER 31,
                                                      ---------------------------------------------------------------------
                                                      1995            1996            1997             1998            1999
                                                      ----            ----            ----             ----            ----
<S>                                                   <C>             <C>             <C>              <C>             <C>
Computation of Earnings:
  Income (loss) before income taxes,
   minority interests and cumulative
   effect of change in accounting
   principle                                          $  (21)        $  (947)        $(11,893)        $(35,747)       $(91,316)
  Add:
    Fixed charges (as computed below)                  1,214           1,912            9,825           32,296         126,675
    Equity in losses (earnings) of
     unconsolidated affiliate                             --              --            1,138           (2,055)             --
                                                      ------         -------         --------         --------        --------
                                                      $1,193         $   965         $   (930)        $ (5,506)       $ 35,359
                                                      ======         =======         ========         ========        ========

Computation of Fixed Charges and Combined
 Fixed Charges and Preferred Stock
 Dividends:
  Interest expense                                    $1,101         $ 1,748         $  7,095         $ 11,179        $ 60,971
  Amortization of deferred financing
   costs and discount on long-term debt                   36              55            2,159           17,910          49,937
  Interest component of operating lease
   expense                                                77             109              571            3,207          15,767
                                                      ------         -------         --------         --------        --------
    Fixed charges                                      1,214           1,912            9,825           32,296         126,675
  Preferred stock dividends                               --              --            2,199            5,411          28,881
                                                      ------         -------         --------         --------        --------
    Combined fixed charges and preferred
     stock dividends                                  $1,214         $ 1,912         $ 12,024         $ 37,707         155,556
                                                      ======         =======         ========         ========        ========
Ratio of Earnings to Fixed Charges                        --              --               --               --              --
                                                      ======         =======         ========         ========        ========
Deficiency of Earnings to Cover Fixed
 Charges                                              $   21         $   947         $ 10,755         $ 37,802        $ 91,316
                                                      ======         =======         ========         ========        ========
Ratio of Earnings to Combined Fixed
 Charges and Preferred Stock Dividends                    --              --               --               --              --
                                                      ======         =======         ========         ========        ========
Deficiency of Earnings to Cover Combined
 Fixed Charges and Preferred Stock
 Dividends                                            $   21         $   947         $ 12,954         $ 43,213        $120,197
                                                      ======         =======         ========         ========        ========

</TABLE>






<PAGE>

                                                                      EXHIBIT 21

                 CROWN CASTLE INTERNATIONAL CORP. SUBSIDIARIES


Crown Castle Operating Company (f/k/a Crown Castle USA Holdings Company), a
Delaware corporation

Crown Communication Inc., a Delaware corporation (d/b/a Crown Communications,
CrownCom)

Crown Castle USA Inc. (f/k/a Crown Network Systems, Inc.), a Pennsylvania
corporation

Crown Castle PT Inc., a Delaware corporation

Crown Castle South Inc., a Delaware corporation

Crown Castle GT Corp., a Delaware corporation

Crown Castle GT Holding Company LLC, a Delaware limited liability company

Crown Castle International LLC, a Delaware limited liability company

Crown Castle Australia Limited, an Australian limited liability company

CCAL Towers Pty Ltd, an Australian limited liability company

Crown Castle UK Holding Corp., a Delaware corporation

Crown Castle UK Holdings Limited (f/k/a Castle Transmission Services (Holdings)
Ltd.), an England and Wales company (unrestricted)

Crown Castle UK Limited (f/k/a Castle Transmission International Ltd.), an
England and Wales company

Crown Castle do Brasil Ltda, a Brazilian limited liability company

Crown Castle Investment Corp., a Delaware corporation (unrestricted)

CCA Investment Corp., a Delaware corporation

Crown Castle Atlantic Holding Company LLC, a Delaware limited liability company

Crown Castle Investment Corp. II, a Delaware corporation (unrestricted)

<PAGE>

                                                                      EXHIBIT 23

                         Independent Auditors' Consent

The Board of Directors
Crown Castle International Corp.:

We consent to incorporation by reference in the registration statement
(No. 333-67379) on Form S-8, the registration statement (No. 333-83395) on Form
S-3, and the registration statement (No. 333-94821) on Form S-3 of Crown Castle
International Corp. of our reports dated February 22, 2000, relating to the
consolidated balance sheets of Crown Castle International Corp. and subsidiaries
as of December 31, 1999 and 1998, and the related consolidated statements of
operations and comprehensive loss, cash flows, and stockholders' equity
(deficit) for each of the years in the three-year period ended December 31,
1999, and all related schedules, which reports appear in the December 31, 1999,
annual report on Form 10-K of Crown Castle International Corp.

KPMG LLP


Houston, Texas
March 27, 2000

<TABLE> <S> <C>

<PAGE>

<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Company's consolidated balance sheet and consolidated statement of operations
and is qualified in its entirety by reference to such consolidated financial
statements together with the related footnotes thereto.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<EXCHANGE-RATE>                                      1
<CASH>                                         549,328
<SECURITIES>                                         0
<RECEIVABLES>                                   77,508
<ALLOWANCES>                                     3,218
<INVENTORY>                                     19,178
<CURRENT-ASSETS>                               662,045
<PP&E>                                       2,587,574
<DEPRECIATION>                                 119,473
<TOTAL-ASSETS>                               3,836,650
<CURRENT-LIABILITIES>                          131,281
<BONDS>                                      1,542,343
                          422,923
                                          0
<COMMON>                                         1,574
<OTHER-SE>                                   1,616,173
<TOTAL-LIABILITY-AND-EQUITY>                 3,836,650
<SALES>                                              0
<TOTAL-REVENUES>                               345,759
<CGS>                                                0
<TOTAL-COSTS>                                  156,748
<OTHER-EXPENSES>                               187,150
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             110,908
<INCOME-PRETAX>                               (91,316)
<INCOME-TAX>                                       275
<INCOME-CONTINUING>                           (94,347)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                      (2,414)
<NET-INCOME>                                  (96,761)
<EPS-BASIC>                                     (0.96)
<EPS-DILUTED>                                   (0.96)


</TABLE>


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