CROWN CASTLE INTERNATIONAL CORP
S-3/A, 2000-07-17
COMMUNICATIONS SERVICES, NEC
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<PAGE>


   As filed with the Securities and Exchange Commission on July 17, 2000

                                                 Registration No. 333-41106

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                ---------------

                              Amendment No. 1

                                    to
                                    FORM S-3
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                ---------------
                        Crown Castle International Corp.
             (Exact name of Registrant as specified in its charter)
                Delaware                               76-0470458
    (State or other jurisdiction of       (I.R.S. Employer Identification No.)
     incorporation or organization)
                                510 Bering Drive
                                   Suite 500
                              Houston, Texas 77057
                                 (713) 570-3000
  (Address, including zip code, and telephone number, including area code, of
                   Registrant's principal executive offices)

                                ---------------

                              W. Benjamin Moreland
                             Senior Vice President,
                     Chief Financial Officer and Treasurer
                        Crown Castle International Corp.
                                510 Bering Drive
                                   Suite 500
                              Houston, Texas 77057
                                 (713) 570-3000
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)

                                ---------------

                                   Copies to:
         Stephen L. Burns, Esq.                 Kirk A. Davenport, Esq.
        Cravath, Swaine & Moore                     Latham & Watkins
            Worldwide Plaza                         885 Third Avenue
           825 Eighth Avenue                    New York, New York 10022
        New York, New York 10019

                                ---------------

   Approximate date of commencement of proposed sale to public: From time to
time after the effective date of this Registration Statement, as determined by
the Registrant.
   If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [_]
   If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, as amended (the "Securities Act"), other than securities offered only in
connection with dividend or interest reinvestment plans, check the following
box. [X]
   If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
   If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
   If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]

                                ---------------


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--------------------------------------------------------------------------------
<PAGE>



   The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant
shall file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act or until this Registration Statement shall become effective
on such date as the Commission, acting pursuant to said Section 8(a), may
determine.

<PAGE>


PROSPECTUS

                        CROWN CASTLE INTERNATIONAL CORP.

   From time to time, we may sell any of the following securities:

    --DEBT SECURITIES

    --PREFERRED STOCK

    --COMMON STOCK

    --WARRANTS

   We will provide the specific terms of these securities in one or more
supplements to this prospectus. You should read this prospectus and any
prospectus supplement carefully before you invest.

   Our common stock is traded over-the-counter on The Nasdaq Stock Market's
National Market under the trading symbol "TWRS." The applicable prospectus
supplement will contain information, where applicable, as to any other listing
(if any) on The Nasdaq Stock Market's National Market or any securities
exchange of the securities covered by the prospectus supplement.

   In addition, up to 10,000,000 shares of common stock may be offered by
certain selling stockholders. For additional information on the methods of
sale, you should refer to the section entitled "Plan of Distribution."

   The securities may be sold directly by us or, in case of the common stock,
may be sold by the selling stockholders, to investors, through agents
designated from time to time or to or through underwriters or dealers. See
"Plan of Distribution." If any underwriters are involved in the sale of any
securities in respect of which this prospectus is being delivered, the names of
such underwriters and any applicable commissions or discounts will be set forth
in a prospectus supplement. The net proceeds we expect to receive from such
sale also will be set forth in a prospectus supplement. We would not receive
any of the proceeds from the sale of common stock by selling stockholders.

   This prospectus may not be used to offer or sell any securities unless
accompanied by a prospectus supplement.

   Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved the securities to be issued under this
prospectus or determined if this prospectus is accurate or adequate. Any
representation to the contrary is a criminal offense.

               The date of this prospectus is July 18, 2000.
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                         <C>
ABOUT THIS PROSPECTUS......................................................   1
WHERE YOU CAN FIND MORE INFORMATION........................................   1
INCORPORATION OF INFORMATION WE FILE WITH THE SEC..........................   1
FORWARD-LOOKING STATEMENTS.................................................   2
THE COMPANY................................................................   3
RATIO OF EARNINGS TO FIXED CHARGES.........................................   4
USE OF PROCEEDS............................................................   4
DESCRIPTION OF DEBT SECURITIES.............................................   5
DESCRIPTION OF CAPITAL STOCK...............................................  15
DESCRIPTION OF WARRANTS....................................................  24
SELLING STOCKHOLDERS.......................................................  25
PLAN OF DISTRIBUTION.......................................................  26
VALIDITY OF SECURITIES.....................................................  27
EXPERTS....................................................................  27
</TABLE>
<PAGE>

                             ABOUT THIS PROSPECTUS

   This prospectus is part of a registration statement that we filed with the
SEC utilizing a "shelf" registration process. Under this shelf process, we may,
over the next two years, sell any combination of the securities described in
this prospectus in one or more offerings up to a total dollar amount of
$1,500,000,000. In addition, under this shelf process, one or more selling
stockholders also may sell up to 10,000,000 shares of our common stock in one
or more offerings.

   This prospectus provides you with a general description of the securities we
may offer. Each time we sell securities, we will provide a prospectus
supplement that will contain specific information about the terms of that
offering. The prospectus supplement may also add, update or change information
contained in this prospectus. You should read both this prospectus and any
prospectus supplement together with additional information described
immediately below under the heading "Where You Can Find More Information."

                      WHERE YOU CAN FIND MORE INFORMATION

   We file annual, quarterly and special reports, proxy statements and other
information with the SEC. Our SEC filings are available to the public over the
Internet at the SEC's web site at http://www.sec.gov. You may also read and
copy any document we file with the SEC at the SEC's following public reference
facilities:

<TABLE>
<S>                             <C>                           <C>
     Public Reference Room        New York Regional Office        Chicago Regional Office
    450 Fifth Street, N.W.          7 World Trade Center              Citicorp Center
           Room 1024                     Suite 1300               500 West Madison Street
    Washington, D.C. 20549        New York, New York 10048              Suite 1400
                                                               Chicago, Illinois 60661-2511
</TABLE>

   You may also obtain copies of the documents at prescribed rates by writing
to the Public Reference Section of the SEC at 450 Fifth Street, N.W., Room
1024, Washington, D.C. 20549. Please call 1-800-SEC-0330 for further
information on the operations of the public reference facilities. Our SEC
filings are also available at the offices of The Nasdaq Stock Market at 1735 K
Street, N.W., Washington, D.C. 20006.

               INCORPORATION OF INFORMATION WE FILE WITH THE SEC

   The SEC allows us to "incorporate by reference" the information we file with
them, which means:

  --incorporated documents are considered part of this prospectus;

  --we can disclose important information to you by referring you to those
    documents; and

  --information that we file with the SEC will automatically update and
    supersede this incorporated information.

   We incorporate by reference the documents listed below which were filed with
the SEC under the Securities Exchange Act of 1934:

  (1) Our Annual Report on Form 10-K for the year ended on December 31, 1999.

  (2) Our Quarterly Report on Form 10-Q for the quarter ended on March 31,
      2000.

  (3) Our Proxy Statement pursuant to Section 14(a) of the Securities
      Exchange Act of 1934, filed on April 24, 2000.

  (4) The description of our common stock contained in the Registration
      Statement on Form S-1, as amended (File No. 333-74553), filed on March
      16, 1999.
<PAGE>

  (5) Our Amendment No. 1 to our Current Report on Form 8-K/A dated July 23,
      1999.

  (6) Our Current Report on Form 8-K dated May 18, 2000.

  (7)Our Current Report on Form 8-K dated May 18, 2000.

  (8)Our Current Report on Form 8-K dated June 7, 2000.

  (9)Our Current Report on Form 8-K dated June 26, 2000.

   We also incorporate by reference each of the following documents that we
will file with the SEC after the date of the initial filing of the registration
statement and prior to the time we and the selling stockholders sell all of the
securities offered by this prospectus:

  --Reports filed under Section 13(a) and (c) of the Exchange Act;

  --Definitive proxy or information statements filed under Section 14 of the
    Exchange Act in connection with any subsequent stockholders meeting; and

  --Any reports filed under Section 15(d) of the Exchange Act.

   You can obtain any of the filings incorporated by reference in this document
through us, or from the SEC through the SEC's web site or at the addresses
listed above. Documents incorporated by reference are available from us without
charge, excluding any exhibits to those documents unless the exhibit is
specifically incorporated by reference as an exhibit in this prospectus. You
can obtain documents incorporated by reference in this prospectus by requesting
them in writing or by telephone from us at the following address:

                        Crown Castle International Corp.
                                510 Bering Drive
                                   Suite 500
                               Houston, TX 77057
                           Attention: Donald J. Reid
                           Telephone: (713) 570-3000
                           Facsimile: (713) 570-3100

   If you request any incorporated documents from us, we will mail them to you
by first class mail, or another equally prompt means, within one business day
after we receive your request.

                           FORWARD-LOOKING STATEMENTS

   Some of the statements contained in or incorporated by reference in this
prospectus discuss our plans and strategies for our business or state other
forward-looking statements, as this term is defined in the Private Securities
Litigation Reform Act. The words "anticipates," "believes," "estimates,"
"expects," "plans," "intends" and similar expressions are intended to identify
these forward-looking statements, but are not the exclusive means of
identifying them. These forward-looking statements reflect the current views of
our management; however, various risks, uncertainties and contingencies could
cause our actual results, performance or achievements to differ materially from
those expressed in, or implied by, these statements, including the following:

  .  the success or failure of our efforts to implement our business strategy

  .  the other factors discussed below under the heading "Risk Factors" and
     elsewhere in this prospectus

   We assume no obligation to update publicly any forward-looking statements,
whether as a result of new information, future events or otherwise. For a
discussion of important risks of an investment in our securities, including
factors that could cause actual results to differ materially from results
referred to in the forward-looking statements, see "Risk Factors." You should
carefully consider the information set forth under the caption "Risk Factors."
In light of these risks, uncertainties and assumptions, the forward-looking
events discussed in or incorporated by reference in this prospectus might not
occur.

                                       2
<PAGE>

                                  THE COMPANY

   We are a leading owner and operator of towers and transmission networks for
wireless communications and broadcast transmission companies. As of April 30,
2000, we owned, leased or managed 10,392 towers, including 8,195 sites in the
United States and Puerto Rico and 2,197 sites in the United Kingdom. We have
entered into agreements, which, when completed, will provide us with over 900
additional towers in the United States in 2000. In addition, we have recently
entered into an agreement which provides us with a tower portfolio of
approximately 700 towers in Australia. Our customers currently include many of
the world's major wireless communications and broadcast companies, including
GTE Wireless, Verizon, BellSouth Mobility, Powertel, Nextel, Sprint PCS, AT&T
Wireless, Triton PCS, Tritel Communications, Motorola, Cable & Wireless Optus,
One Zone 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 wireless technologies such as broadband data, or
     "3G," technology.

   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 April 30, 2000, 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, which is conducted through Crown
Castle UK Holdings Limited ("CCUK"), 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.

   Our primary business in Australia is the leasing of antenna space to
wireless carriers. In March 2000, a 66.7% subsidiary of ours, Crown Castle
Australia Limited, or "CCAL", entered into an agreement to purchase
approximately 700 towers in Australia from Cable & Wireless Optus for at total
purchase price of approximately $135 million in cash (Australian $220 million).
Upon completion of the Cable & Wireless Optus transaction, which we expect to
close during the remainder of 2000, CCAL will own and operate a nationwide
portfolio of approximately 700 towers in Australia covering over 90 percent of
the population.

                                       3
<PAGE>

   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 GTE Wireless, Verizon, BellSouth
Mobility, Powertel, Nextel, Sprint PCS, AT&T Wireless, Triton PCS, Tritel
Communications and Motorola. In the United Kingdom our major customers include
the BBC, Cellnet, Dolphin, NTL, ONdigital, One2One, Orange, Virgin Radio and
Vodafone AirTouch. Our principal customer in Australia is Cable & Wireless
Optus.

   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 $270
million for lease to wireless carriers such as Verizon, BellSouth Mobility, 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.

   Our principal executive offices are located at 510 Bering Drive, Suite 500,
Houston, Texas 77057, and our telephone number is (713) 570-3000.

                       RATIO OF EARNINGS TO FIXED CHARGES

   The following table sets forth our consolidated ratio of earnings to fixed
charges, the deficiency of our consolidated earnings to cover fixed charges,
our consolidated ratio of earnings to combined fixed charges and preferred
stock dividends and the deficiency of our consolidated earnings to cover
combined fixed charges and preferred stock dividends for the periods indicated.


<TABLE>
<CAPTION>
                                                                    Three Months
                                      Years Ended December 31,         Ended
                                 ----------------------------------  March 31,
                                 1995 1996  1997    1998     1999       2000
                                 ---- ---- ------- ------- -------- ------------
                                     (in thousands of dollars)
<S>                              <C>  <C>  <C>     <C>     <C>      <C>
Ratio of Earnings to Fixed
 Charges.......................   --    --      --      --       --        --
Deficiency of Earnings to Cover
 Fixed Charges.................  $21  $947 $10,755 $37,802 $ 91,316   $30,508
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   $42,001
</TABLE>

   For purposes of computing the ratios of earnings to fixed charges and
earnings to combined fixed charges and preferred stock dividends, earnings
represent income (loss) before income taxes, minority interests, extraordinary
item, cumulative effect of change in accounting principle, fixed charges and
undistributed 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.

                                USE OF PROCEEDS

   We will use the net proceeds from our sale of the securities for our general
corporate purposes, which may include repaying indebtedness, making additions
to our working capital, funding future acquisitions or for any other purpose we
describe in the applicable prospectus supplement.

   We will not receive any of the proceeds from the sale of common stock that
may be sold by selling stockholders.


                                       4
<PAGE>

                         DESCRIPTION OF DEBT SECURITIES

   The following description of the terms of the debt securities sets forth
certain general terms and provisions of the debt securities to which any
prospectus supplement may relate. The particular terms of the debt securities
offered by any prospectus supplement and the extent, if any, to which such
general provisions may apply to the debt securities so offered will be
described in the prospectus supplement relating to such debt securities.
Accordingly, for a description of the terms of a particular issue of debt
securities, reference must be made to both the prospectus supplement relating
thereto and to the following description.

   The debt securities will be our general obligations and may be subordinated
to "Senior Indebtedness" (as defined below) we have or may incur to the extent
set forth in the prospectus supplement relating to them. See "Description of
Debt Securities--Subordination" below. Debt securities will be issued under an
indenture between us and one or more commercial banks to be selected as
trustees (collectively, the "trustee"). A copy of the form of indenture has
been filed as an exhibit to the registration statement filed with the SEC. The
following discussion of certain provisions of the indenture is a summary only
and should not be considered a complete description of the terms and provisions
of the indenture. Accordingly, the following discussion is qualified in its
entirety by reference to the provisions of the indenture, including the
definition of certain terms used below.

General

   The indenture does not limit the aggregate principal amount of debt
securities that can be issued under it. The debt securities may be issued in
one or more series as we may authorize from time to time. You should refer to
the applicable prospectus supplement for the following terms of the debt
securities of the series with respect to which that prospectus supplement is
being delivered:

     (a) the title of the debt securities of the series;

     (b) any limit on the aggregate principal amount of the debt securities
  of the series that may be authenticated and delivered under the indenture;

     (c) the date or dates on which the principal and premium with respect to
  the debt securities of the series are payable;

     (d) the rate or rates (which may be fixed or variable) at which the debt
  securities of the series shall bear interest (if any) or the method of
  determining such rate or rates, the date or dates from which such interest
  shall accrue, the interest payment dates on which such interest shall be
  payable or the method by which such dates will be determined, the record
  dates for the determination of holders thereof to whom such interest is
  payable (in the case of Registered Securities (as defined below)), and the
  basis upon which interest will be calculated if other than that of a 360-
  day year of twelve 30-day months;

     (e) the currency or currencies in which debt securities of the series
  shall be denominated, the place or places, if any, in addition to or
  instead of the corporate trust office of the trustee (in the case of
  Registered Securities) or the principal New York office of the trustee (in
  the case of Bearer Securities), where the principal, premium, and interest
  with respect to debt securities of the series shall be payable;

     (f) the price or prices at which, the period or periods within which,
  and the terms and conditions upon which debt securities of the series may
  be redeemed, in whole or in part at our option or otherwise;

     (g) whether debt securities of the series are to be issued as Registered
  Securities or Bearer Securities (as defined below) or both and, if Bearer
  Securities are to be issued, whether coupons will be attached to them,
  whether Bearer Securities of the series may be exchanged for Registered
  Securities of the series, and the circumstances under which and the places
  at which any such exchanges, if permitted, may be made;

     (h) if any debt securities of the series are to be issued as Bearer
  Securities or as one or more Global Securities (as defined below)
  representing individual Bearer Securities of the series, whether certain

                                       5
<PAGE>

  provisions for the payment of additional interest or tax redemptions shall
  apply; whether interest with respect to any portion of a temporary Bearer
  Security of the series payable with respect to any interest payment date
  prior to the exchange of such temporary Bearer Security for definitive
  Bearer Securities of the series shall be paid to any clearing organization
  with respect to the portion of such temporary Bearer Security held for its
  account and, in such event, the terms and conditions (including any
  certification requirements) upon which any such interest payment received
  by a clearing organization will be credited to the persons entitled to
  interest payable on such interest payment date; and the terms upon which a
  temporary Bearer Security may be exchanged for one or more definitive
  Bearer Securities of the series;

     (i) our obligation, if any, to redeem, purchase, or repay debt
  securities of the series under any sinking fund or analogous provisions or
  at the option of a holder of such debt securities and the price or prices
  at which, the period or periods within which, and the terms and conditions
  upon which debt securities of the series shall be redeemed, purchased, or
  repaid, in whole or in part, under such obligations;

     (j) the terms, if any, upon which the debt securities of the series may
  be convertible into or exchanged for our or any other issuer's or obligor's
  common stock, preferred stock, other debt securities or warrants for common
  stock, preferred stock, indebtedness or other securities of any kind and
  the terms and conditions upon which such conversion or exchange shall be
  effected, including the initial conversion or exchange price or rate, the
  conversion or exchange period and any other additional provisions;

     (k) if other than denominations of $1,000 or any integral multiple
  thereof, the denominations in which debt securities of the series shall be
  issuable;

     (l) if the amount of principal, premium or interest with respect to the
  debt securities of the series may be determined with reference to an index
  or pursuant to a formula, the manner in which such amounts will be
  determined;

     (m) if the principal amount payable at the stated maturity of debt
  securities of the series will not be determinable as of any one or more
  dates prior to such stated maturity, the amount that will be deemed to be
  such principal amount as of any such date for any purpose, including the
  principal amount thereof which will be due and payable upon any maturity
  other than the stated maturity or which will be deemed to be outstanding as
  of any such date (or, in any such case, the manner in which such deemed
  principal amount is to be determined), and if necessary, the manner of
  determining the equivalent thereof in United States currency;

     (n) any changes or additions to the provisions of the indenture dealing
  with defeasance;

     (o) if other than the principal amount thereof, the portion of the
  principal amount of debt securities of the series that shall be payable
  upon declaration of acceleration of the maturity thereof or provable in
  bankruptcy;

     (p) the terms, if any, of the transfer, mortgage, pledge or assignment
  as security for the debt securities of the series of any properties,
  assets, moneys, proceeds, securities or other collateral, including whether
  certain provisions of the Trust Indenture Act of 1939, as amended, are
  applicable and any corresponding changes to provisions of the Indenture as
  then in effect;

     (q) any addition to or change in the Events of Default (as defined
  below) with respect to the debt securities of the series and any change in
  the right of the trustee or the holders to declare the principal, premium
  and interest with respect to such debt securities due and payable;

     (r) if the debt securities of the series shall be issued in whole or in
  part in the form of a global security, the terms and conditions, if any,
  upon which such global security may be exchanged in whole or in part for
  other individual debt securities in definitive registered form, the
  depositary (as defined in the applicable prospectus supplement) for such
  global security and the form of any legend or legends to be borne by any
  such global Security in addition to or in lieu of the legend referred to in
  the Indenture;

     (s) any trustee, authenticating or paying agents, transfer agents or
  registrars;

                                       6
<PAGE>

     (t) the applicability of, and any addition to or change in, the
  covenants and definitions then set forth in the indenture or in the terms
  then set forth in the indenture relating to permitted consolidations,
  mergers, or sales of assets;

     (u) the terms, if any, of any guarantee of the payment of principal,
  premium, and interest with respect to debt securities of the series and any
  corresponding changes to the provisions of the indenture as then in effect;

     (v) the subordination, if any, of the debt securities of the series
  pursuant to the indenture and any changes or additions to the provisions of
  the Indenture relating to subordination;

     (w) with regard to debt securities of the series that do not bear
  interest, the dates for certain required reports to the trustee; and

     (x) any other terms of the debt securities of the series (which terms
  shall not be prohibited by the provisions of the Indenture).

   The prospectus supplement will also describe any material United States
federal income tax consequences or other special considerations applicable to
the series of debt securities to which such prospectus supplement relates,
including those applicable to (a) Bearer Securities, (b) debt securities with
respect to which payments of principal, premium or interest are determined with
reference to an index or formula (including changes in prices of particular
securities, currencies or commodities), (c) debt securities with respect to
which principal, or interest is payable in a foreign or composite currency, (d)
debt securities that are issued at a discount below their stated principal
amount, bearing no interest or interest at a rate that at the time of issuance
is below market rates ("Original Issue Discount Debt Securities") and (e)
variable rate debt securities that are exchangeable for fixed rate debt
securities.

   Unless otherwise provided in the applicable prospectus supplement,
Registered Securities may be transferred or exchanged at the office of the
trustee at which its corporate trust business is principally administered in
the United States or at the office of the trustee or the trustee's agent in the
Borough of Manhattan, the City and State of New York, at which its corporate
agency business is conducted, subject to the limitations provided in the
indenture, without the payment of any service charge, other than any tax or
governmental charge payable in connection therewith. Bearer Securities will be
transferable only by delivery. Provisions with respect to the exchange of
Bearer Securities will be described in the prospectus supplement relating to
such Bearer Securities.

   All funds which we pay to a paying agent for the payment of principal,
premium or interest with respect to any debt securities that remain unclaimed
at the end of two years after such principal, premium or interest shall have
become due and payable will be repaid to us, and the holders of such debt
securities or any coupons appertaining thereto will thereafter look only to us
for payment thereof.

Global Securities

   The debt securities of a series may be issued in whole or in part in the
form of one or more global securities. A global security is a debt security
that represents, and is denominated in an amount equal to the aggregate
principal amount of, all outstanding debt securities of a series, or any
portion thereof, in either case having the same terms, including the same
original issue date, date or dates on which principal and interest are due, and
interest rate or method of determining interest. A global security will be
deposited with, or on behalf of, a depositary, which will be identified in the
prospectus supplement relating to such debt securities. Global securities may
be issued in either registered or bearer form and in either temporary or
definitive form. Unless and until it is exchanged in whole or in part for the
individual debt securities represented thereby, a global security may not be
transferred except as a whole by the depositary to a nominee of the depositary,
by a nominee of the depositary to the depositary or another nominee of the
depositary, or by the depositary or any nominee of the depositary to a
successor depositary or any nominee of such successor.

                                       7
<PAGE>

   The specific terms of the depositary arrangement with respect to a series of
debt securities will be described in the prospectus supplement relating to such
debt securities. We anticipate that the following provisions will generally
apply to depositary arrangements.

   Upon the issuance of a global security, the depositary for such global
security will credit, on its book entry registration and transfer system, the
respective principal amounts of the individual debt securities represented by
such global security to the accounts of persons that have accounts with the
depositary ("participants"). Such accounts shall be designated by the dealers
or underwriters with respect to such debt securities or, if such debt
securities are offered and sold directly by us or through one or more agents,
by us or such agents. Ownership of beneficial interests in a global security
will be limited to participants or persons that hold beneficial interests
through participants. Ownership of beneficial interests in such global security
will be shown on, and the transfer of that ownership will be effected only
through, records maintained by the depositary (with respect to interests of
participants) or records maintained by participants (with respect to interests
of persons other than participants). The laws of some states require that
certain purchasers of securities take physical delivery of such securities in
definitive form. Such limitations and laws may impair the ability to transfer
beneficial interests in a global security.

   So long as the depositary for a global security, or its nominee, is the
registered owner or holder of such global security, such depositary or nominee,
as the case may be, will be considered the sole owner or holder of the
individual debt securities represented by such global security for all purposes
under the indenture. Except as provided below, owners of beneficial interests
in a global security will not be entitled to have any of the individual debt
securities represented by such global security registered in their names, will
not receive or be entitled to receive physical delivery of any of such debt
securities in definitive form, and will not be considered the owners or holders
thereof under the Indenture.

   Subject to the restrictions applicable to Bearer Securities described in an
applicable prospectus supplement (see "Limitations on Issuance of Bearer
Securities" below), payments of principal, premium, and interest with respect
to individual debt securities represented by a global security will be made to
the depositary or its nominee, as the case may be, as the registered owner or
holder of such global security. Neither we, the trustee, any paying agent or
registrar for such debt securities or any agent of ours or the trustee's will
have any responsibility or liability for (a) any aspect of the records relating
to or payments made by the depositary, its nominee or any participants on
account of beneficial interests in the global security or for maintaining,
supervising or reviewing any records relating to such beneficial interests, (b)
the payment to the owners of beneficial interests in the global security of
amounts paid to the depositary or its nominee or (c) any other matter relating
to the actions and practices of the depositary, its nominee or its
participants. Neither we, the trustee, any paying agent or registrar for such
debt securities or any agent of ours or the trustee will be liable for any
delay by the depositary, its nominee or any of its participants in identifying
the owners of beneficial interests in the global security, and we and the
trustee may conclusively rely on, and will be protected in relying on,
instructions from the depositary or its nominee for all purposes.

   We expect that the depositary for a series of debt securities or its
nominee, upon receipt of any payment of principal, premium or interest with
respect to a definitive global security representing any of such debt
securities, will immediately credit participants' accounts with payments in
amounts proportionate to their respective beneficial interests in the principal
amount of such global security, as shown on the records of the depositary or
its nominee. We also expect that payments by participants to owners of
beneficial interests in such global security held through such participants
will be governed by standing instructions and customary practices, as is now
the case with securities held for the accounts of customers and registered in
"street name." Such payments will be the responsibility of such participants.
Receipt by owners of beneficial interests in a temporary global security of
payments of principal, premium or interest with respect thereto will be subject
to the restrictions described in an applicable prospectus supplement (see
"Limitation on Issuance of Bearer Securities" below).

                                       8
<PAGE>

   If the depositary for a series of debt securities is at any time unwilling,
unable or ineligible to continue as depositary, we shall appoint a successor
depositary. If a successor depositary is not appointed by us within 90 days,
we will issue individual debt securities of such series in exchange for the
global security representing such series of debt securities. In addition, we
may at any time and in our sole discretion, subject to any limitations
described in the prospectus supplement relating to such debt securities,
determine to no longer have debt securities of a series represented by a
global security and, in such event, will issue individual debt securities of
such series in exchange for the global security representing such series of
debt securities. Furthermore, if we so specify with respect to the debt
securities of a series, an owner of a beneficial interest in a global security
representing debt securities of such series may, on terms acceptable to us,
the trustee, and the depositary for such global security, receive individual
debt securities of such series in exchange for such beneficial interests,
subject to any limitations described in the prospectus supplement relating to
such debt securities. In any such instance, an owner of a beneficial interest
in a global security will be entitled to physical delivery of individual debt
securities of the series represented by such global security equal in
principal amount to such beneficial interest and to have such debt securities
registered in its name (if the debt securities are issuable as Registered
Securities). Individual debt securities of such series so issued will be
issued (a) as Registered Securities in denominations, unless otherwise
specified by us, of $1,000 and integral multiples thereof if the debt
securities are issuable as Registered Securities, (b) as Bearer Securities in
the denomination or denominations specified by us if the debt securities are
issuable as Bearer Securities or (c) as either Registered Securities or Bearer
Securities as described above if the debt securities are issuable in either
form.

Limitations on Issuance of Bearer Securities

   The debt securities of a series may be issued as Registered Securities
(which will be registered as to principal and interest in the register
maintained by the registrar for such debt securities) or Bearer Securities
(which will be transferable only by delivery). If such debt securities are
issuable as Bearer Securities, the applicable prospectus supplement will
describe certain special limitations and considerations that will apply to
such debt securities.

Certain Covenants

 Merger, Consolidation or Sale of Assets

   The indenture provides that we may not:

     (1) consolidate or merge with or into (whether or not we are the
  surviving corporation), or

     (2) sell, assign, transfer, lease, convey or otherwise dispose of all or
  substantially all of our properties or assets in one or more related
  transactions, to another corporation, Person or entity, unless:

       (a) either:

         (A) we are the surviving corporation, or

         (B) the entity or the Person (as defined) formed by or surviving
      any such consolidation or merger (if other than us) or to which the
      sale, assignment, transfer, lease, conveyance or other disposition
      shall have been made is a corporation organized or existing under
      the laws of the United States, any state thereof or the District of
      Columbia;

       (b) the entity or Person formed by or surviving any such
    consolidation or merger (if other than us) or the entity or Person to
    which the sale, assignment, transfer, lease, conveyance or other
    disposition shall have been made assumes all our obligations under the
    debt securities and the indenture pursuant to a supplemental indenture
    in a form reasonably satisfactory to the trustee;

       (c) immediately after such transaction no Default (as defined)
    exists; and

       (d) except in the case of:

         (A) a merger of us with or into our Wholly Owned Restricted
      Subsidiary (as defined) and

                                       9
<PAGE>

         (B) a merger entered into solely for the purpose of
      reincorporating us in another jurisdiction:

                 (x) in the case of a merger or consolidation in which we are
              the surviving corporation, our Debt to Adjusted Consolidated
              Cash Flow Ratio (as defined) at the time of the transaction,
              after giving pro forma effect to the transaction as of such date
              for balance sheet purposes and as if the transaction had
              occurred at the beginning of our most recently ended four full
              fiscal quarter period for which internal financial statements
              are available for income statement purposes, would have been
              less than our Debt to Adjusted Consolidated Cash Flow Ratio for
              the same period without giving pro forma effect to such
              transaction, or

                 (y) in the case of any other such transaction, the Debt to
              Adjusted Consolidated Cash Flow of the entity or Person formed
              by or surviving any such consolidation or merger (if other than
              us), or to which the sale, assignment, transfer, lease,
              conveyance or other disposition shall have been made, at the
              time of the transaction, after giving pro forma effect to the
              transaction as of such date for balance sheet purposes and as if
              such transaction had occurred at the beginning of the most
              recently ended four full fiscal quarter period of such entity or
              Person for which internal financial statements are available for
              income statement purposes, would have been less than our Debt to
              Adjusted Consolidated Cash Flow Ratio for the same period
              without giving pro forma effect to such transaction; provided
              that for purposes of determining the Debt to Adjusted
              Consolidated Cash Flow Ratio of any entity or Person for
              purposes of this clause (y) the entity or Person will be
              substituted for us in the definition of Debt to Adjusted
              Consolidated Cash Flow Ratio and the defined terms included in
              the indenture.

Subordination

   Debt securities of a series may be subordinated ("subordinated debt
securities") to Senior Indebtedness (as defined in the applicable prospectus
supplement) to the extent set forth in the prospectus supplement relating
thereto. We conduct substantially all our operations through subsidiaries, and
the holders of debt securities (whether or not subordinated debt securities)
will be structurally subordinated to the creditors of our subsidiaries.

   Upon any payment or distribution of our assets to creditors or upon our
total or partial liquidation or dissolution or in a bankruptcy, receivership,
or similar proceeding relating to us or our property, holders of Senior
Indebtedness shall be entitled to receive payment in full in cash of the Senior
Indebtedness before holders of subordinated debt securities shall be entitled
to receive any payment of principal, premium, or interest with respect to the
subordinated debt securities, and until the Senior Indebtedness is paid in
full, any distribution to which holders of subordinated debt securities would
otherwise be entitled shall be made to the holders of Senior Indebtedness
(except that such holders may receive shares of stock and any debt securities
that are subordinated to Senior Indebtedness to at least the same extent as the
subordinated debt securities).

   We may not make any payments of principal, premium, or interest with respect
to subordinated debt securities, make any deposit for the purpose of defeasance
of such subordinated debt securities, or repurchase, redeem, or otherwise
retire (except, in the case of subordinated debt securities that provide for a
mandatory sinking fund, by the delivery of subordinated debt securities by us
to the trustee in satisfaction of our sinking fund obligation) any subordinated
debt securities if (a) any principal, premium or interest with respect to
Senior Indebtedness is not paid in full in cash within any applicable grace
period (including at maturity) or (b) any other default on Senior Indebtedness
occurs and the maturity of such Senior Indebtedness is accelerated in
accordance with its terms, unless, in either case, the default has been cured
or waived and such acceleration has been rescinded, such Senior Indebtedness
has been paid in full in cash or we and the trustee receive written notice
approving such payment from the representatives of such Senior Indebtedness.
During the continuance of any default (other than a default described in clause
(a) or (b) above) with respect to any Designated Senior

                                       10
<PAGE>

Indebtedness (as defined in the applicable prospectus supplement) pursuant to
which the maturity thereof may be accelerated immediately without further
notice (except such notice as may be required to effect such acceleration) or
the expiration of any applicable grace periods, we may not pay the subordinated
debt securities for a period (the "payment blockage period") commencing on the
receipt by us and the trustee of written notice of such default from the
representative of any Designated Senior Indebtedness specifying an election to
effect a payment blockage period (a "blockage notice"). The payment blockage
period may be terminated before its expiration by written notice to the trustee
and us from the person who gave the blockage notice, by repayment in full in
cash of the Senior Indebtedness with respect to which the blockage notice was
given or because the default giving rise to the payment blockage period is no
longer continuing. Unless the holders of such Designated Senior Indebtedness
shall have accelerated the maturity thereof, we may resume payments on the
subordinated debt securities after the expiration of the payment blockage
period. Not more than one blockage notice may be given in any period of 360
consecutive days. In no event, however, may the total number of days during
which any payment blockage period or periods is in effect exceed 179 days in
the aggregate during any period of 360 consecutive days. After all Senior
Indebtedness is paid in full and until the subordinated debt securities are
paid in full, holders of the subordinated debt securities shall be subrogated
to the rights of holders of Senior Indebtedness to receive distributions
applicable to Senior Indebtedness.

   By reason of such subordination, in the event of insolvency, creditors of
ours who are holders of Senior Indebtedness, as well as certain general
creditors of ours, may recover more, ratably, than the holders of the
subordinated debt securities.

Events of Default and Remedies

   The following events are defined in the indenture as "Events of Default"
with respect to a series of debt securities:

     (a) default for 30 days in the payment when due of interest on the debt
  securities;

     (b) default in payment when due of the principal of or premium, if any,
  on the debt securities;

     (c) our failure or failure by any of our Subsidiaries (as defined) to
  comply with the provisions described under the caption "--Certain
  Covenants--Merger, Consolidation or Sale of Assets" or our failure to
  consummate a Change of Control Offer (as defined) or Asset Sale Offer (as
  defined) in accordance with the provisions of the indenture;

     (d) our failure or failure by any of our Subsidiaries for 30 days after
  notice to comply with any other agreements in the indenture or the debt
  securities;

     (e) default under any mortgage, indenture or instrument under which
  there may be issued or by which there may be secured or evidenced any
  Indebtedness (as defined) for money borrowed by us or any of our
  Significant Subsidiaries (as defined), or the payment of which is
  guaranteed by us or any of our Significant Subsidiaries, whether such
  Indebtedness or guarantee now exists, or is created after the date of the
  indenture, which default:

       (1) is caused by a failure to pay principal of or premium, if any,
    or interest on the Indebtedness prior to the expiration of the grace
    period provided in such Indebtedness on the date of the default (a
    "Payment Default"); or

       (2) results in the acceleration of the Indebtedness prior to its
    express maturity and, in each case, the principal amount of any such
    Indebtedness, together with the principal amount of any other such
    Indebtedness under which there has been a Payment Default or the
    maturity of which has been so accelerated, aggregates $20.0 million or
    more;

     (f) failure by us or any of our Significant Subsidiaries to pay final
  judgments aggregating in excess of $20.0 million, which judgments are not
  paid, discharged or stayed for a period of 60 days; or

                                       11
<PAGE>

     (g) certain events of bankruptcy or insolvency described in the
  indenture with respect to us or any of our Restricted Subsidiaries.

     (h) any other Event of Default provided with respect to debt securities
  of that series.

   An Event of Default with respect to one series of debt securities is not
necessarily an Event of Default for another series.

   A prospectus supplement may omit, modify or add to the foregoing Events of
Default.

   If any Event of Default occurs and is continuing, the trustee under the
indenture or the holders of at least 25% in principal amount at maturity of the
then outstanding notes of the applicable series may declare all the notes of
such series to be due and payable immediately. Notwithstanding the foregoing,
in the case of an Event of Default arising from certain events of bankruptcy or
insolvency, with respect to us, all outstanding debt securities will become due
and payable without further action or notice. Holders of the debt securities
may not enforce the indenture or the debt securities except as provided in the
indenture. Subject to certain limitations, Holders of a majority in principal
amount at maturity of the then outstanding debt securities may direct the
trustee under the indenture in its exercise of any trust or power.

   The holders of a majority in aggregate principal amount at maturity of the
debt securities then outstanding by notice to the trustee under the indenture
may on behalf of the holders of all of such series of debt securities waive any
existing Default or Event of Default and its consequences under the applicable
indenture except a continuing Default or Event of Default in the payment of
interest on, or the principal of the debt securities.

   The indenture provides that if a Default occurs and is continuing and is
known to the trustee, the trustee must mail to each holder of the relevant
series of debt securities notice of the Default within 90 days after it occurs.
Except in the case of a Default in the payment of principal of or interest on
any debt security, the trustee may withhold notice if and so long as a
committee of its trust officers determines that withholding notice is not
opposed to the interest of the holders of the debt securities. In addition, we
are required to deliver to the trustee, within 90 days after the end of each
fiscal year, a certificate indicating whether the signers thereof know of any
Default that occurred during the previous year. We are also required to deliver
to the trustee, promptly after the occurrence thereof, written notice of any
event that would constitute a Default, the status thereof and what action we
are taking or proposes to take in respect thereof.

Modification of the Indenture

   We and the trustee may enter into supplemental indentures without the
consent of the holders of debt securities for one or more of the following
purposes:

     (a) to evidence the succession of another person to us pursuant to the
  provisions of the indenture relating to consolidations, mergers and sales
  of assets and the assumption by such successor of our covenants, agreements
  and obligations in the indenture and in the debt securities;

     (b) to surrender any right or power conferred upon us by the indenture,
  to add to our covenants such further covenants, restrictions, conditions or
  provisions for the protection of the holders of all or any series of debt
  securities as our board of directors shall consider to be for the
  protection of the holders of such debt securities, and to make the
  occurrence, or the occurrence and continuance, of a default in any of such
  additional covenants, restrictions, conditions or provisions a default or
  an Event of Default under the indenture (provided, however, that with
  respect to any such additional covenant, restriction, condition or
  provision, such supplemental indenture may provide for a period of grace
  after default, which may be shorter or longer than that allowed in the case
  of other defaults, may provide for an immediate enforcement upon such
  default, may limit the remedies available to the trustee upon such default
  or may limit the right of holders of a majority in aggregate principal
  amount of any or all series of debt securities to waive such default);

                                       12
<PAGE>

     (c) to cure any ambiguity or correct or supplement any provision
  contained in the indenture, in any supplemental indenture or in any debt
  securities that may be defective or inconsistent with any other provision
  contained therein, to convey, transfer, assign, mortgage or pledge any
  property to or with the trustee, or to make such other provisions in regard
  to matters or questions arising under the indenture as shall not adversely
  affect the interests of any holders of debt securities of any series;

     (d) to modify or amend the indenture in such a manner as to permit the
  qualification of the indenture or any supplemental indenture under the
  Trust Indenture Act as then in effect;

     (e) to add to or change any of the provisions of the indenture to
  provide that Bearer Securities may be registerable as to principal, to
  change or eliminate any restrictions on the payment of principal or premium
  with respect to Registered Securities or of principal, premium or interest
  with respect to Bearer Securities, or to permit Registered Securities to be
  exchanged for Bearer Securities, so as to not adversely affect the
  interests of the holders of debt securities or any coupons of any series in
  any material respect or permit or facilitate the issuance of debt
  securities of any series in uncertificated form;

     (f) to comply with the provisions of the indenture relating to
  consolidations, mergers and sales of assets;

     (g) in the case of subordinated debt securities, to make any change in
  the provisions of the indenture relating to subordination that would limit
  or terminate the benefits available to any holder of senior indebtedness
  under such provisions (but only if each such holder of senior indebtedness
  consents to such change);

     (h) to add guarantees with respect to the debt securities or to secure
  the debt securities;

     (i) to make any change that does not adversely affect the rights of any
  holder;

     (j) to add to, change, or eliminate any of the provisions of the
  indenture with respect to one or more series of debt securities, so long as
  any such addition, change or elimination not otherwise permitted under the
  indenture shall (1) neither apply to any debt security of any series
  created prior to the execution of such supplemental indenture and entitled
  to the benefit of such provision nor modify the rights of the holders of
  any such debt security with respect to such provision or (2) become
  effective only when there is no such debt security outstanding;

     (k) to evidence and provide for the acceptance of appointment by a
  successor or separate trustee with respect to the debt securities of one or
  more series and to add to or change any of the provisions of the indenture
  as shall be necessary to provide for or facilitate the administration of
  the indenture by more than one trustee; and

     (l) to establish the form or terms of debt securities and coupons of any
  series, as described under "Description of Debt Securities--General" above.

   With the consent of the holders of a majority in aggregate principal amount
of the outstanding debt securities of each series affected thereby, we and the
trustee may from time to time and at any time enter into a supplemental
indenture for the purpose of adding any provisions to, changing in any manner
or eliminating any of the provisions of the Indenture or of any supplemental
Indenture or modifying in any manner the rights of the holder of the debt
securities of such series; provided, however, that without the consent of the
holders of each debt security so affected, no such supplemental indenture shall
(a) reduce the percentage in principal amount of debt securities of any series
whose holders must consent to an amendment, (b) reduce the rate of or extend
the time for payment of interest on any debt security or coupon or reduce the
amount of any payment to be made with respect to any coupon, (c) reduce the
principal of or extend the stated maturity of any debt security, (d) reduce the
premium payable upon the redemption of any debt security or change the time at
which any debt security may or shall be redeemed, (e) make any debt security
payable in a currency other than that stated in the debt security, (f) in the
case of any subordinated debt security or coupons appertaining thereto, make
any change in the provisions of the indenture relating to subordination that
adversely affects the rights of

                                       13
<PAGE>

any holder under such provisions, (g) release any security that may have been
granted with respect to the debt securities, (h) make any change in the
provisions of the indenture relating to waivers of defaults or amendments that
require unanimous consent, (i) change any obligation of ours provided for in
the indenture to pay additional interest with respect to Bearer Securities or
(j) limit our obligation to maintain a paying agency outside the United States
for payment on Bearer Securities or limit our obligation to redeem certain
Bearer Securities.

Satisfaction and Discharge of the Indenture; Defeasance

   The indenture shall generally cease to be of any further effect with respect
to a series of debt securities if (a) we have delivered to the trustee for
cancellation all debt securities of such series (with certain limited
exceptions) or (b) all debt securities and coupons of such series not
theretofore delivered to the trustee for cancellation shall have become due and
payable, or are by their terms to become due and payable within one year or are
to be called for redemption within one year, and we shall have deposited with
the trustee as trust funds the entire amount sufficient to pay at maturity or
upon redemption all such debt securities and coupons (and if, in either case,
we shall also pay or cause to be paid all other sums payable under the
indenture by us).

   In addition, we shall have a "legal defeasance option" (pursuant to which we
may terminate, with respect to the debt securities of a particular series, all
of our obligations under such debt securities and the indenture with respect to
such debt securities) and a "covenant defeasance option" (pursuant to which we
may terminate, with respect to the debt securities of a particular series, our
obligations with respect to such debt securities under certain specified
covenants contained in the indenture). If we exercise our legal defeasance
option with respect to a series of debt securities, payment of such debt
securities may not be accelerated because of an Event of Default. If we
exercise our covenant defeasance option with respect to a series of debt
securities, payment of such debt securities may not be accelerated because of
an Event of Default related to the specified covenants.

   The applicable prospectus supplement will describe the procedures we must
follow in order to exercise our defeasance options.

                                       14
<PAGE>

                          DESCRIPTION OF CAPITAL STOCK

   Our authorized capital stock consists of 600,000,000 shares of common stock,
par value $.01 per share, 90,000,000 shares of Class A common stock, par value
$.01 per share, and 10,000,000 shares of preferred stock, par value $.01 per
share. As of July 5, 2000 there were 183,683,790 shares of common stock
outstanding, no shares of Class A common stock outstanding, 241,431 shares of
12 3/4% Senior Exchangeable Preferred Stock due 2010 outstanding and 200,000
shares of 8 1/4% Cumulative Convertible Redeemable Preferred Stock due 2012
outstanding.

Common Stock

 Voting Rights

   Each share of common stock is entitled to one vote. The common stock votes
together as a single class on all matters presented for a vote of the
stockholders, except as provided under the Delaware General Corporation Law.

 Dividends and Liquidation Rights

   Each share of common stock is entitled to receive dividends if, as and when
declared by the board of directors out of funds legally available for that
purpose, subject to approval of certain holders of preferred stock. In the
event of our dissolution, after satisfaction of amounts payable to our
creditors and distribution of any preferential amounts to the holders of
outstanding preferred stock, if any, holders of common stock are entitled to
share ratably in the assets available for distribution to the stockholders.

 Other Provisions

   There are no preemptive rights to subscribe for any additional securities
which we may issue, and there are no redemption provisions or sinking fund
provisions applicable to the common stock. All outstanding shares of common
stock are legally issued, fully paid and nonassessable.

Class A Common Stock

 Voting Rights

   Each share of Class A common stock is entitled to one vote for each such
share on all matters presented to the stockholders, except the election of
directors. The holders of the shares of Class A common stock vote, except as
provided under the Delaware General Corporation Law, together with the holders
of the common stock and any other class or series of our stock accorded such
general voting rights, as a single class.

   The holders of Class A common stock, subject to limitations, have a veto
over certain significant corporate actions we may take.

 Convertibility

   Each share of Class A common stock is convertible, at the option of its
record holder, into one share of common stock at any time.

   In the event of any transfer of any share of Class A common stock to any
person other than an Affiliate (as defined in Rule 12b-2 of the Exchange Act)
of the transferor, such share of Class A common stock automatically converts,
without any further action, into one share of common stock. However, a holder
of shares of Class A common stock may pledge its shares to a lender under a
bona fide pledge of such shares of Class A common stock as collateral security
for any indebtedness or other obligation of any person due to the pledgee or
its nominee.

                                       15
<PAGE>

 Dividends and Liquidation Rights

   Holders of shares of Class A common stock are entitled to the same dividends
and liquidation rights as holders of shares of common stock.

Preferred Stock

   Under our certificate of incorporation, we may issue up to 10,000,000 shares
of preferred stock in one or more series. Our board of directors has the
authority, without any vote or action by the stockholders, to create one or
more series of preferred stock up to the limit of our authorized but unissued
shares of preferred stock and to fix their designations, preferences, rights,
qualifications, limitations and restrictions, including the voting rights,
dividend rights, dividend rate, conversion rights, terms of redemption
(including sinking fund provisions), redemption price or prices, liquidation
preferences and the number of shares constituting any series.

12 3/4% Exchangeable Preferred Stock due 2010

   Each share of exchangeable preferred stock has a liquidation preference of
$1,000 per share and is exchangeable, at our option, in whole but not in part,
for our exchange debentures.

 Voting Rights

   The shares of exchangeable preferred stock have no voting rights, except as
required by law and as specified in the certificate of designations. If we fail
to meet our obligations under the certificate of designations, the holders of
the exchangeable preferred stock will be entitled to elect two additional
members to the board of directors.

 Dividends

   Dividends are paid on each March 15, June 15, September 15 and December 15,
at an annual fixed rate of 12 3/4%. On or before December 15, 2003, we have the
option to pay dividends in cash or in additional fully paid and non-assessable
shares of exchangeable preferred stock having an aggregate liquidation
preference equal to the amount of such dividends. After December 15, 2003,
dividends will be paid only in cash.

 Mandatory Redemption

   We are required to redeem all of the shares of exchangeable preferred stock
outstanding on December 15, 2010 at a redemption price equal to 100% of the
liquidation preference of such shares, plus accumulated and unpaid dividends to
the date of redemption.

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<PAGE>

 Optional Redemption

   On or after December 15, 2003, we may redeem some or all of the shares of
exchangeable preferred stock at any time at certain specified redemption
prices. In addition, before December 15, 2001, we may redeem up to 35% of the
exchangeable preferred stock with the proceeds of public equity offerings or
strategic equity investments at a redemption price equal to 112.750% of the
liquidation preference of the exchangeable preferred stock, together with
accumulated and unpaid dividends.

 Change of Control

   If we experience specific kinds of changes in control, we will be required
to make an offer to purchase any and all shares of exchangeable preferred stock
at a purchase price of 101% of the liquidation preference of such shares
together with all accumulated and unpaid dividends.

 Certain Covenants

   We issued the exchangeable preferred stock under a certificate of
designations that became part of our certificate of incorporation. The
certificate of designations contains certain covenants that, among other
things, limit our ability and the ability of our subsidiaries to borrow money;
pay dividends on stock or purchase capital stock; make investments and sell
assets or merge with or into other companies.

 Ranking

   The exchangeable preferred stock ranks (1) senior to all our other classes
of capital stock established after the issue date of the exchangeable preferred
stock that do not expressly provide that they rank on par with the exchangeable
preferred stock as to dividends and distributions upon our liquidation, winding
up and dissolution and (2) on par with any class of capital stock established
after the date of issuance of the exchangeable preferred stock the terms of
which provide that such class or series will rank on par with the exchangeable
preferred stock as to dividends and distributions upon our liquidation, winding
up and dissolution.

8 1/4% Cumulative Convertible Redeemable Preferred Stock

   On November 19, 1999, we privately placed 200,000 shares of series A
convertible preferred stock with a wholly owned subsidiary of GE Capital
("GE"). Each share of series A convertible preferred stock automatically
converts into one share of series B convertible preferred stock upon a sale or
other transfer of such share to a party other than an affiliate of GE. Each
share of convertible preferred stock has a liquidation preference of $1,000 and
is convertible, at the option of the holder, in whole or in part, into shares
of our common stock.

 Voting Rights

   Holders of series A convertible preferred stock are entitled to vote on all
matters voted on by holders of common stock, voting together as a single class
with the other holders of common stock, on all matters submitted for a
shareholder vote. Each share of series A convertible preferred stock has voting
rights equal to the number of votes that could be cast by the holder of the
number of shares of common stock into which each share of series A convertible
preferred stock is convertible on the record date of such vote.

   The shares of series B convertible preferred stock have no voting rights,
except as required by law and as specified in the certificate of designations
if certain events occur or fail to occur.

 Convertibility

   The shares of convertible preferred stock are convertible, at the option of
the holder, into shares of our common stock at a conversion price of $26.875
per share of common stock.

                                       17
<PAGE>

 Dividends

   Dividends are paid on each March 15, June 15, September 15 and December 15,
at an annual fixed rate of 8 1/4%. Dividends on the convertible preferred stock
can be paid at our option in cash, common stock or any combination of cash and
common stock. Holders of the 8 1/4% convertible preferred stock will also be
eligible to receive additional dividends up to an amount of $1,000,000 per
year, if certain events occur or fail to occur.

 Mandatory Redemption

   We are required to redeem all of the shares of convertible preferred stock
outstanding on March 31, 2012 at a redemption price equal to 100% of the
liquidation preference of such shares, plus accumulated and unpaid dividends to
the date of redemption.

 Optional Redemption

   On or after October 1, 2002, we may redeem some or all of the shares of
convertible preferred stock at any time at certain specified redemption prices.

 Change of Control

   Upon the occurrence of specified change of control events, the holders of
the convertible preferred stock, if the current market price of our common
stock as of the date of such change of control is less than the conversion
price, have a one time option, exercisable at any time within ninety days
following such change of control event, to convert all of their outstanding
shares of convertible preferred stock into shares of our common stock at an
adjusted conversion price per share equal to the greater of (1) the last
reported sale price for one share of common stock in an arm's length
transaction as of the date of such change of control and (2) $12.96. We may, at
our option and in lieu of issuing the shares of common stock issuable upon a
change of control event as described above, make a cash payment to holders of
convertible preferred stock equal to the current market price of such common
stock otherwise issuable.

 Certain Covenants

   We issued the exchangeable preferred stock under a certificate of
designations that became part of our certificate of incorporation. The
certificate of designations contains certain covenants that, among other
things, limit our ability and the ability of our subsidiaries to pay dividends
on stock or sell assets or merge with or into other companies.

 Ranking

   The convertible preferred stock, with respect to dividends and distributions
upon our liquidation, dissolution or winding-up, ranks (1) senior to our common
stock and all other classes of our capital stock authorized and issued after
the issue date of the convertible preferred stock that do not expressly state
that they rank on par with or senior to the convertible preferred stock with
respect to dividends and distributions upon our liquidation, dissolution or
winding-up, (2) on par with all other classes of our capital stock authorized
and issued after the issue date of the convertible preferred stock that
expressly provide that such class or series will rank on par with the
convertible preferred stock with respect to dividends and distributions upon
our liquidation, dissolution or winding-up, and (3) junior to (A) the senior
exchangeable preferred stock, (B) up to an aggregate of $200.0 million in any
class of capital stock authorized and issued after the issue date of the
convertible preferred stock to replace the senior exchangeable preferred stock
and (C) up to an aggregate of $400.0 million in any other class of senior stock
authorized and issued after the issue date of the convertible preferred stock.

                                       18
<PAGE>

Senior Preferred Warrants

   In connection with the offering of a series of senior convertible preferred
stock in August 1997 and October 1997, we issued warrants to purchase an
aggregate of 1,314,990 shares of common stock, of which 835,990 remained
outstanding as of May 1, 2000, at an exercise price of $7.50 per share. In
connection with the offering of the cumulative convertible preferred stock in
November 1999, we issued warrants to purchase an aggregate of 1,000,000 shares
of our common stock at an exercise price of $26.875 per share.

Certificate of Incorporation and By-laws

   Stockholders' rights and related matters are governed by the Delaware
General Corporation Law, and our certificate of incorporation and the by-laws.
Certain provisions of our certificate of incorporation and by-laws, which are
summarized below, may have the effect, either alone or in combination with each
other, of discouraging or making more difficult a tender offer or takeover
attempt that is opposed by our board of directors but that a stockholder might
consider to be in its best interest. Such provisions may also adversely affect
prevailing market prices for the common stock. We believe that such provisions
are necessary to enable us to develop our business in a manner that will foster
our long-term growth without disruption caused by the threat of a takeover not
deemed by our board of directors to be in our best interests and those of our
stockholders.

 Classified Board of Directors and Related Provisions

   Our certificate of incorporation provides that our directors, other than
those directors who may be elected by holders of any series of preferred stock
or holders of the Class A common stock, initially are divided into three
classes of directors, consisting of three, three and four directors. One class
of directors, initially consisting of four directors, was elected for a term
expiring at the annual meeting of stockholders to be held in 2001, another
class initially consisting of four directors was elected for a term expiring at
the annual meeting of stockholders in 2002, and another class initially
consisting of three directors was elected for a term expiring at the annual
meeting of stockholders in 2003. The classified board provisions will prevent a
party who acquires control of a majority of our outstanding voting stock from
obtaining control of our board of directors until the second annual
stockholders meeting following the date such party obtains the controlling
interest. Voting stock is defined in our certificate of incorporation as the
outstanding shares of our capital stock entitled to vote in a general vote of
our stockholders as a single class with shares of common stock, which shares of
capital stock include the shares of Class A common stock and shares of our 8
1/4% cumulative convertible redeemable preferred stock.

 No Stockholder Action by Written Consent; Special Meeting

   The certificate of incorporation prohibits stockholders from taking action
by written consent in lieu of an annual or special meeting, except relating to
holders of Class A common stock on matters on which they are entitled to vote
and, thus, stockholders may only take action at an annual or special meeting
called in accordance with our by-laws. The by-laws provide that special
meetings of stockholders may only be called by our secretary at the direction
of our board of directors under a resolution adopted by the board.

   These provisions could have the effect of delaying consideration of a
stockholder proposal until the next annual meeting. The provisions would also
prevent the holders of a majority of the voting power of our capital stock
entitled to vote from unilaterally using the written consent procedure to take
stockholder action.

 Advance Notice Requirements for Stockholder Proposals and Director Nominations

   Our by-laws establish advance notice procedures for stockholder proposals
and the nomination, other than by or at the direction of the board of
directors, of candidates for election as directors. These procedures provide
that the notice of stockholder proposals and stockholder nominations for the
election of directors at an annual

                                       19
<PAGE>

meeting must be in writing and received by our secretary at least 90 days but
not more than 120 days prior to the first anniversary of our preceding year's
annual meeting. However, if the date of our annual meeting is more than 30 days
earlier than, or more than 90 days later than, the anniversary date of our
preceding year's annual meeting, notice by a stockholder will be considered
timely if it is delivered not earlier than the 120th day prior to such annual
meeting and not later than the later of the 90th day prior to such annual
meeting or the 10th day following the day on which public disclosure of the
date of the annual meeting was made. The notice of nominations for the election
of directors must set forth certain information concerning the stockholder
giving the notice and each nominee.

   By requiring advance notice of nominations by stockholders, these procedures
will afford our board of directors an opportunity to consider the
qualifications of the proposed nominees and, to the extent deemed necessary or
desirable by the board of directors, to inform stockholders about these
qualifications. By requiring advance notice of other proposed business, these
procedures will provide our board of directors with an opportunity to inform
stockholders of any business proposed to be conducted at a meeting, together
with any recommendations as to the board of directors' position on action to be
taken on such business. This should allow stockholders to better decide whether
to attend a meeting or to grant a proxy for the disposition of any such
business.

 Dilution

   Our certificate of incorporation provides that our board of directors is
authorized to create and issue, whether or not in connection with the issuance
and sale of any of its stock or other securities or property, rights entitling
the holders to purchase from us shares of stock or other securities of us or of
any other corporation. Our board of directors is authorized to issue these
rights even though the creation and issuance of these rights could have the
effect of discouraging third parties from seeking, or impairing their right to
seek, to:

     (1) acquire a significant portion of our outstanding securities;

     (2) engage in any transaction which might result in a change of control
  of the corporation; or

     (3) enter into any agreement, arrangement or understanding with another
  party to accomplish these transactions or for the purpose of acquiring,
  holding, voting or disposing of any of our securities.

 Amendments

   Our certificate of incorporation and by-laws provide that we may amend,
alter, change or repeal any provision contained in our certificate of
incorporation or a preferred stock designation. However, the affirmative vote
of the holders of at least 80% of the voting power of the then outstanding
voting stock, voting together as a single class, is required to amend, repeal
or adopt any provision inconsistent with certain provisions our certificate of
incorporation, including the provisions discussed above relating to the
classification of our board of directors, prohibiting stockholder action by
written consent, and prohibiting the calling of special meetings by
stockholders.

   Our by-laws may be amended by either the holders of 80% of the voting power
of the voting stock or by the majority of the board; but the board may alter,
amend or repeal or adopt new by-laws in conflict with some of these provisions
by a two-thirds vote of the entire board.

Rights Plan

 Rights

   Our board of directors has declared a dividend of one right for each
outstanding share of common stock and each outstanding share of Class A common
stock. Rights have been issued in connection with each outstanding share of
common stock and Class A common stock; and rights will be issued in connection
with

                                       20
<PAGE>

common stock and Class A common stock issued subsequently until the
distribution date, and, in certain circumstances, for common stock and Class A
common stock issued after the distribution date referred to below. Each right,
when it becomes exercisable as described below, will entitle the registered
holder to purchase from us one one-thousandth of a share of Series A
Participating Cumulative Preferred Stock at a price of $110.00 per one one-
thousandth of a share, subject to adjustment in certain circumstances. The
description and terms of the rights are set forth in a rights agreement between
us and the rights agent named therein. The rights will not be exercisable until
the distribution date and will expire on the tenth annual anniversary of the
rights agreement, unless earlier redeemed by us. Until a right is exercised,
the holder, as such, will have no rights as our stockholder, including the
right to vote or to receive dividends.

 Distribution Date

   Under the rights agreement, the "distribution date" is the earlier of:

     (1) such time as we learn that a person or group, including any
  affiliate or associate of such person or group, has acquired, or has
  obtained the right to acquire, beneficial ownership of more than 15% of our
  outstanding voting securities (such person or group being an "acquiring
  person"), subject to the exceptions relating to Bell South, Bell Atlantic,
  GTE and Berkshire Fund IV Investment Corp., Berkshire Investors LLC and
  Berkshire Partners LLC (collectively, the "Berkshire group"), unless
  provisions preventing accidental triggering of the distribution of the
  rights apply, and

     (2) the close of business on such date, if any, as may be designated by
  our board of directors following the commencement of, or first public
  disclosure of an intent to commence, a tender or exchange offer for more
  than 15% or more of the outstanding shares of voting securities.

   Each member of the Berkshire group will not otherwise be deemed an acquiring
person if the aggregate ownership interest of the Berkshire group does not
exceed the greater of:

     (a) the aggregate ownership interest of the Berkshire group upon the
  execution of the rights agreement, reduced by an amount equal to any
  disposition of voting securities following the date the rights agreement is
  executed and

     (b) 15% of the outstanding voting securities.

 Triggering Event and Effect of Triggering Event

   When there is an acquiring person, the rights will entitle each holder,
other than such acquiring person, of a right to purchase, at the purchase
price, that number of one one-thousandths of a preferred share equivalent to
the number of shares of common stock that at the time of such event would have
a market value of twice the purchase price.

   If we are acquired in a merger or other business combination by an acquiring
person or an affiliate or associate of an acquiring person that is a publicly
traded corporation, or if 50% or more of our assets or assets representing 50%
or more of our revenues or cash flow are sold, leased, exchanged or otherwise
transferred to

                                       21
<PAGE>

an acquiring person or an affiliate or associate of an acquiring person that is
a publicly traded corporation, each right will entitle its holder, other than
rights beneficially owned by such acquiring person, to purchase, for the
purchase price, that number of common shares of such corporation which at the
time of the transaction would have a market value or, in some cases, book value
of twice the purchase price. If we are acquired in a merger or other business
combination by an acquiring person or an affiliate or associate of an acquiring
person that is not a publicly traded entity, or if 50% or more of our assets or
assets representing 50% or more of our revenues or cash flow are sold, leased,
exchanged or otherwise transferred to an acquiring person or affiliate or
associate of an acquiring person that is not a publicly traded entity, each
right will entitle its holder to purchase for the purchase price, at such
holder's option:

     (1) that number of shares of the surviving corporation, which could be
  us, in the transaction with such entity, which at the time of the
  transaction would have a book value of twice the purchase price,

     (2) that number of shares of the ultimate parent of or entity
  controlling such surviving corporation which at the time of the transaction
  would have a book value of twice the purchase price or

     (3) if such entity has an affiliate which has publicly traded common
  shares, that number of common shares of such affiliate which at the time of
  the transaction would have a market value of twice the purchase price.

   Any rights that are at any time beneficially owned by an acquiring person,
or any affiliate or associate of an acquiring person, will be null and void and
nontransferable, and any holder of any such right will be unable to exercise or
transfer any such right.

 Redemption

   At any time prior to the earlier of (1) such time as a person or group
becomes an acquiring person and (2) the expiration date, our board of directors
may redeem the rights in whole, but not in part, at a price, in cash or common
stock or other securities of ours deemed by our board of directors to be at
least equivalent in value, of $.01 per right, which amount shall be subject to
adjustment as provided in the rights agreement. Immediately upon the action of
our board of directors ordering the redemption of the rights, and without any
further action and without any notice, the right to exercise the rights will
terminate and the only right of the holders of rights will be to receive the
redemption price.

   In addition, at any time after there is an acquiring person, our board of
directors may elect to exchange each right for consideration per right
consisting of one-half of the securities that would be issuable at such time
upon exercise of one right under the terms of the rights agreement.

 Amendment

   At any time prior to the distribution date, we may, without the approval of
any holder of any rights, supplement or amend any provision of the rights
agreement, including the date on which the expiration date or distribution date
shall occur, the definition of acquiring person, the time during which the
rights may be redeemed or the terms of the preferred shares, except that no
supplement or amendment shall be made which reduces the redemption price other
than under certain adjustments therein.

 Certain Effects of the Rights Plan

   The rights plan is designed to protect our stockholders in the event of
unsolicited offers to acquire us and other coercive takeover tactics which, in
the opinion of our board of directors, could impair its ability to represent
stockholder interests. The provisions of the rights plan may render an
unsolicited takeover of us more difficult or less likely to occur or might
prevent such a takeover, even though such takeover may offer our stockholders
the opportunity to sell their stock at a price above the prevailing market rate
and may be favored by a majority of our stockholders.

                                       22
<PAGE>

Section 203 of the Delaware General Corporation Law

   Section 203 of the Delaware General Corporation Law prohibits certain
transactions between a Delaware corporation and an "interested stockholder",
which is defined as a person who, together with any affiliates and/or
associates of such person, beneficially owns, directly or indirectly, 15% or
more of the outstanding voting shares of a Delaware corporation. This provision
prohibits certain business combinations between an interested stockholder and a
corporation for a period of three years after the date the interested
stockholder acquired its stock, unless:

     (1) the business combination is approved by the corporation's board of
  directors prior to the date the interested stockholder acquired shares;

     (2) the interested stockholder acquired at least 85% of the voting stock
  of the corporation in the transaction in which it became an interested
  stockholder; or

     (3) the business combination is approved by a majority of the board of
  directors and by the affirmative vote of two-thirds of the outstanding
  voting stock owned by disinterested stockholders at an annual or special
  meeting.

   A business combination is defined broadly to include mergers,
consolidations, sales or other dispositions of assets having an aggregate value
of 10% or more of the consolidated assets of the corporation, and certain
transactions that would increase the interested stockholder's proportionate
share ownership in the corporation. A Delaware corporation, under a provision
in its certificate of incorporation or by-laws, may elect not to be governed by
Section 203 of the Delaware General Corporation Law. We are subject to the
restrictions imposed by Section 203.

   Under certain circumstances, Section 203 makes it more difficult for a
person who could be an "interested stockholder" to effect various business
combinations with a corporation for a three-year period. It is anticipated that
the provisions of Section 203 of the Delaware General Corporation Law may
encourage companies interested in acquiring us to negotiate in advance with the
board of directors, since the stockholder approval requirement would be avoided
if a majority of the directors then in office approves, prior to the date on
which a stockholder becomes an interested stockholder, either the business
combination or the transaction which results in the stockholder becoming an
interested stockholder.

Limitations of Directors' Liability

   Our certificate of incorporation provides that none of our directors will be
personally liable to us or our stockholders for monetary damages for breach of
fiduciary duty as a director except for liability:

     (1) for any breach of the director's duty of loyalty to us or our
  stockholders,

     (2) for acts of omissions not in good faith or which involve intentional
  misconduct or a knowing violation of law,

     (3) under Section 174 of the Delaware General Corporation Law, or

     (4) for any transaction from which the director derived an improper
  personal benefit.

   The effect of these provisions will be to eliminate our rights and the
rights of our stockholders (through stockholders' derivatives suits on behalf
of us) to recover monetary damages against a director for breach of fiduciary
duty as a director (including breaches resulting from grossly negligent
behavior), except in the situations described above. These provisions will not
limit the liability of directors under federal securities laws and will not
affect the availability of equitable remedies such as an injunction or
rescission based upon a director's breach of his duty of care.

Transfer Agent

   The Transfer Agent and Registrar for the common stock is ChaseMellon
Shareholder Services, L.L.C.

                                       23
<PAGE>

                            DESCRIPTION OF WARRANTS

   We may issue warrants for the purchase of debt securities, preferred stock
or common stock. Warrants may be issued independently or together with debt
securities, preferred stock or common stock offered by any prospectus
supplement and may be attached to or separate from any such offered securities.
Each series of warrants will be issued under a separate warrant agreement to be
entered into between us and a bank or trust company, as warrant agent. The
warrant agent will act solely as our agent in connection with the warrants and
will not assume any obligation or relationship of agency or trust for or with
any holders or beneficial owners of warrants. The following summary of certain
provisions of the warrants does not purport to be complete and is subject to,
and qualified in its entirety by reference to, the provisions of the warrant
agreement that will be filed with the SEC in connection with the offering of
such warrants.

Debt Warrants

   The prospectus supplement relating to a particular issue of debt warrants
will describe the terms of such debt warrants, including the following: (a) the
title of such debt warrants; (b) the offering price for such debt warrants, if
any; (c) the aggregate number of such debt warrants; (d) the designation and
terms of the debt securities purchasable upon exercise of such debt warrants;
(e) if applicable, the designation and terms of the debt securities with which
such debt warrants are issued and the number of such debt warrants issued with
each such debt security; (f) if applicable, the date from and after which such
debt warrants and any debt securities issued therewith will be separately
transferable; (g) the principal amount of debt securities purchasable upon
exercise of a debt warrant and the price at which such principal amount of debt
securities may be purchased upon exercise (which price may be payable in cash,
securities, or other property); (h) the date on which the right to exercise
such debt warrants shall commence and the date on which such right shall
expire; (i) if applicable, the minimum or maximum amount of such debt warrants
that may be exercised at any one time; (j) whether the debt warrants
represented by the debt warrant certificates or debt securities that may be
issued upon exercise of the debt warrants will be issued in registered or
bearer form; (k) information with respect to book-entry procedures, if any; (1)
the currency or currency units in which the offering price, if any, and the
exercise price are payable; (m) if applicable, a discussion of material United
States federal income tax considerations; (n) the antidilution provisions of
such debt warrants, if any; (o) the redemption or call provisions, if any,
applicable to such debt warrants; and (p) any additional terms of such debt
warrants, including terms, procedures, and limitations relating to the exchange
and exercise of such debt warrants.

Stock Warrants

   The prospectus supplement relating to any particular issue of preferred
stock warrants or common stock warrants will describe the terms of such
warrants, including the following: (a) the title of such warrants; (b) the
offering price for such warrants, if any; (c) the aggregate number of such
warrants; (d) the designation and terms of the common stock or preferred stock
purchasable upon exercise of such warrants; (e) if applicable, the designation
and terms of the offered securities with which such warrants are issued and the
number of such warrants issued with each such offered security; (f) if
applicable, the date from and after which such warrants and any offered
securities issued therewith will be separately transferable; (g) the number of
shares of common stock or preferred stock purchasable upon exercise of a
warrant and the price at which such shares may be purchased upon exercise; (h)
the date on which the right to exercise such warrants shall commence and the
date on which such right shall expire; (i) if applicable, the minimum or
maximum amount of such warrants that may be exercised at any one time; (j) the
currency or currency units in which the offering price, if any, and the
exercise price are payable, (k) if applicable, a discussion of material United
States federal income tax considerations; (l) the antidilution provisions of
such warrants, if any; (m) the redemption or call provisions, if any,
applicable to such warrants; and (n) any additional terms of such warrants,
including terms, procedures and limitations relating to the exchange and
exercise of such warrants.

                                       24
<PAGE>

                              SELLING STOCKHOLDERS

   The selling stockholders may be our directors, executive officers, former
directors, employees or certain holders of our common stock. The prospectus
supplement for any offering of the common stock by selling stockholders will
include the following information:

     --the names of the selling stockholders;

     --the number of shares held by each of the selling stockholders;

     --the percentage of the common stock held by each of the selling
  stockholders; and

     --the number of shares of the common stock offered by each of the
  selling stockholders.

                                       25
<PAGE>

                              PLAN OF DISTRIBUTION

   The distribution of the securities may be effected from time to time in one
or more transactions at a fixed price or prices (which may be changed from time
to time), at market prices prevailing at the time of sale, at prices related to
such prevailing market prices or at negotiated prices. Each prospectus
supplement will describe the method of distribution of the securities offered
therein.

   Our company and any selling stockholders may sell securities directly,
through agents designated from time to time, through underwriting syndicates
led by one or more managing underwriters or through one or more underwriters
acting alone. The selling stockholders may also distribute securities through
one or more special purpose trusts, which will enter into forward purchase
arrangements with selling stockholders and distribute their own securities.
Each prospectus supplement will describe the terms of the securities to which
such prospectus supplement relates, the names of the selling stockholders and
the number of shares of common stock to be sold by each, the name or names of
any underwriters or agents with whom we or the selling stockholders, or both,
have entered into arrangements with respect to the sale of such securities, the
public offering or purchase price of such securities and the net proceeds we or
the selling stockholders will receive from such sale. In addition, each
prospectus supplement will describe any underwriting discounts and other items
constituting underwriters' compensation, any discounts and commissions allowed
or paid to dealers, if any, any commissions allowed or paid to agents, and the
securities exchange or exchanges, if any, on which such securities will be
listed. Dealer trading may take place in certain of the securities, including
securities not listed on any securities exchange.

   If so indicated in the applicable prospectus supplement, we or the selling
stockholders, or both, will authorize underwriters or agents to solicit offers
by certain institutions to purchase securities from us or the selling
stockholders, or both, pursuant to delayed delivery contracts providing for
payment and delivery at a future date. Institutions with which such contracts
may be made include, among others:

  --commercial and savings banks;

  --insurance companies;

  --pension funds;

  --investment companies;

  --educational and charitable institutions.

In all cases, such institutions must be approved by us or the selling
stockholders, or both. Unless otherwise set forth in the applicable prospectus
supplement, the obligations of any purchaser under any such contract will not
be subject to any conditions except that (i) the purchase of the securities
will not at the time of delivery be prohibited under the laws of the
jurisdiction to which such purchaser is subject and (ii) if the securities are
also being sold to underwriters acting as principals for their own account, the
underwriters will have purchased such securities not sold for delayed delivery.
The underwriters and such other persons will not have any responsibility in
respect of the validity or performance of such contracts.

   Any selling stockholder, underwriter or agent participating in the
distribution of the securities may be deemed to be an underwriter, as that term
is defined in the Securities Act, of the securities so offered and sold and any
discounts or commissions received by them, and any profit realized by them on
the same or resale of the securities may be deemed to be underwriting discounts
and commissions under the Securities Act.

   Certain of any such underwriters and agents, including their associates, may
be customers of, engage in transactions with and perform services for us and
our subsidiaries in the ordinary course of business. One or more of our
affiliates may from time to time act as an agent or underwriter in connection
with the sale of the securities to the extent permitted by applicable law. The
participation of any such affiliate in the offer and sale of the securities
will comply with Rule 2720 of the Conduct Rules of the National Association of
Securities Dealers, Inc. regarding the offer and sale of securities of an
affiliate.


                                       26
<PAGE>

   Except as indicated in the applicable prospectus supplement, the securities
are not expected to be listed on a securities exchange, except for the common
stock, which is listed on The Nasdaq Stock Market's National Market, and any
underwriters or dealers will not be obligated to make a market in securities.
We cannot predict the activity or liquidity of any trading in the securities.

   We will not receive any proceeds from the sale of shares of common stock by
the selling stockholders. We will, however, bear certain expenses in connection
with the registration of the securities being offered under this prospectus by
the selling stockholders, including all costs incident to the offering and sale
of the securities to the public other than any commissions and discounts of
underwriters, dealers or agents and any transfer taxes.

                             VALIDITY OF SECURITIES

   The validity of the securities offered hereby will be passed upon for us by
Cravath, Swaine & Moore, New York, New York and for the underwriters or agents,
if any, by Latham & Watkins, New York, New York.

                                    EXPERTS

   Our consolidated financial statements at December 31, 1998 and 1999, and for
each of the three years in the period ended December 31, 1999 have been
incorporated by reference in this prospectus in reliance upon the report of
KPMG LLP, independent certified public accountants incorporated by reference in
this prospectus, and upon the authority of said firm as experts in accounting
and auditing.

   The financial statements of the Powertel Tower Operations at December 31,
1998, and for the year then ended, have been incorporated by reference in this
prospectus in reliance upon the report of KPMG LLP, independent certified
public accountants, incorporated by reference in this prospectus, and upon the
authority of said firm as experts in accounting and auditing.

                                       27
<PAGE>

                                    PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

   The following table sets forth the various expenses in connection with the
sale and distribution of the securities being registered, other than the
underwriting discounts and commissions. All amounts shown are estimates except
for the SEC registration fee.

<TABLE>
<CAPTION>
     SEC registration fee............................................... $299,165
     NASD filing fee....................................................   30,000
     <S>                                                                 <C>
     Printing and engraving expenses....................................   50,000
     Legal fees and expenses............................................  200,000
     Accounting fees and expenses.......................................   35,000
     Miscellaneous......................................................   85,835
                                                                         --------
       Total............................................................ $700,000
                                                                         ========
</TABLE>

Item 15. Indemnification of Directors and Officers

   Section 145 of the General Corporation Law of the State of Delaware ("DGCL")
provides that a corporation has the power to indemnify any director or officer,
or former director or officer, who was or is a party or is threatened to be
made a party to any threatened, pending or completed action, suit or
proceeding, whether civil, criminal, administrative or investigative (other
than an action by or in the right of the corporation) against the expenses
(including attorneys' fees), judgments, fines or amounts paid in settlement
actually and reasonably incurred by them in connection with the defense of any
action by reason of being or having been directors or officers, if such person
shall have acted in good faith and in a manner reasonably believed to be in or
not opposed to the best interests of the corporation, and, with respect to any
criminal action or proceeding, provided that such person had no reasonable
cause to believe his conduct was unlawful, except that, if such action shall be
in the right of the corporation, no such indemnification shall be provided as
to any claim, issue or matter as to which such person shall have been judged to
have been liable to the corporation unless and to the extent that the Court of
Chancery of the State of Delaware (the "Court of Chancery"), or any court in
which such suit or action was brought, shall determine upon application that,
in view of all of the circumstances of the case, such person is fairly and
reasonably entitled to indemnity for such expenses as such court shall deem
proper.

   Accordingly, the Restated Certificate of Incorporation of the Company
(Exhibit 3.1) provides that the Company shall, to the maximum extent permitted
under the DGCL, indemnify each person who is or was a director or officer of
the Company. The Company may, by action of the Board of Directors, indemnify
other employees and agents of the Company, directors, officers, employees or
agents of a subsidiary, and each person serving as a director, officer,
partner, member, employee or agent of another corporation, partnership, limited
liability company, joint venture, trust or other enterprise, at the request of
the Company, with the same scope and effect as the indemnification of directors
and officers of the Company. However, the Company shall be required to
indemnify any person seeking indemnification in connection with a proceeding
(or part thereof) initiated by such person only if such proceeding (or part
thereof) was authorized by the Board of Directors or is a proceeding to enforce
such person's claim to indemnification pursuant to the rights granted by the
Restated Certificate of Incorporation or otherwise by the Company. The Company
may also enter into one or more agreements with any person which provide for
indemnification greater or different than that provided in the Restated
Certificate of Incorporation.

   Furthermore, a director of the Company shall not be liable to the Company or
its stockholders for monetary damages for breach of fiduciary duty as a
director, except for liability (1) for any breach of the director's duty of
loyalty to the Company or its stockholders, (2) for acts or omissions not in
good faith or which involve intentional misconduct or a knowing violation of
law, (3) under Section 174 of the DGCL, or (4) for any transaction from which
the director derived an improper personal benefit.

                                      II-1
<PAGE>

   The Company's By-laws provide that each person who was or is made a party or
is threatened to be made a party to or is involved in any manner in any
threatened, pending or completed action, suit, or proceeding, whether civil,
criminal, administrative or investigative ("Proceeding"), by reason of the fact
that he or she or a person of whom he or she is the legal representative is or
was a director or officer of the Company or, while a director or officer of the
Company, a director, officer, employee or agent of another corporation,
partnership, joint venture, trust or other enterprise shall be indemnified and
held harmless by the Company to the fullest extent permitted by the DGCL. Such
indemnification shall continue as to a person who has ceased to be a director
or officer and shall inure to the benefit of his or her heirs, executors and
administrators; provided, however, that the Company shall indemnify any such
person seeking indemnification in connection with a Proceeding (or part
thereof) initiated by such person only if such Proceeding (or part thereof) was
authorized by the Board of Directors or is a Proceeding to enforce such
person's claim to indemnification pursuant to the rights granted by the
Company's By-laws. The Company shall pay the expenses incurred by any person
described in the first two sentences of this paragraph in defending any such
Proceeding in advance of its final disposition upon, to the extent such an
undertaking is required by applicable law, receipt of an undertaking by or on
behalf of such person to repay such amount if it shall ultimately be determined
that such person is not entitled to be indemnified by the Company as authorized
in the Company's By-laws or otherwise.

   The Company's By-laws further provide that the indemnification and the
advancement of expenses incurred in defending a Proceeding prior to its final
disposition provided by, or granted pursuant to, the Company's By-laws shall
not be exclusive of any other right which any person may have or hereafter
acquire under any statute, provision of the Restated Certificate of
Incorporation, other provision of the Company's By-laws or otherwise. The
Company may also maintain insurance, at its expense, to protect itself and any
person who is or was a director, officer, partner, member, employee or agent of
the Company or a subsidiary or of another corporation, partnership, limited
liability company, joint venture, trust or other enterprise against any
expense, liability or loss, whether or not the Company would have the power to
indemnify such person against such expense, liability or loss under the DGCL.

   The Company's By-laws further provide that the Company may, to the extent
authorized from time to time by the Board of Directors, grant rights to
indemnification, and rights to be paid by the Company the expenses incurred in
defending any Proceeding in advance of its final disposition, to any person who
is or was an employee or agent (other than a director or officer) of the
Company or a subsidiary thereof and to any person who is or was serving at the
request of the Company or a subsidiary thereof as a director, officer, partner,
member, employee or agent of another corporation, partnership, limited
liability company, joint venture, trust or other enterprise, including service
with respect to employee benefit plans maintained or sponsored by the Company
or a subsidiary thereof, to the fullest extent of the provisions of the
Company's By-laws with respect to the indemnification and advancement of
expenses of directors and officers of the Company.


                                      II-2
<PAGE>

Item 16. Exhibits

<TABLE>
<CAPTION>
  Exhibit
    No.                        Description of Exhibit
  -------                      ----------------------
 <C>       <S>                                                              <C>
      @1.1 Form of Underwriting Agreement

      *2.1 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

     **2.2 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.

     **2.3 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

    ***2.4 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.

    ***2.5 Sublease dated June 1, 1999 by and among BellSouth Mobility
           Inc., Certain BMI Affiliates, Crown Castle International Corp.
           and Crown Castle South Inc.

     ++2.6 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.

     ++2.7 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 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

  *****2.9 Letter Agreement dated November 7, 1999 between GTE Wireless
           Incorporated and Crown Castle International Corp.

    ++2.10 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
</TABLE>


                                      II-3
<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
      @4.15 Form of Indenture
      +4.16 Form of Warrant Agreement

        5.1 Opinion of Cravath, Swaine & Moore

     ##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.
</TABLE>


                                      II-4
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
   No.                            Description of Exhibit
 -------                          ----------------------
 <C>      <S>
   **10.9 Global Lease Agreement dated March 31, 1999 between Crown Atlantic
          Company LLC and Cellco Partnership, doing business as Bell Atlantic
          Mobile

  **10.10 Master Build to Suit Agreement dated March 31, 1999 between Cellco
          Partnership, doing business as BellAtlantic Mobile, and Crown
          Atlantic Company LLC

 ***10.11 Agreement to Build to Suit dated June 1, 1999 by and among BellSouth
          Mobility Inc., Crown Castle International Corp. and Crown Castle
          South Inc.

   #10.12 Castle Tower Holding Corp. 1995 Stock Option Plan (Third Restatement)

  ##10.13 Crown Castle International Corp. 1995 Stock Option Plan (Fourth
          Restatement)

  ##10.14 Castle Transmission Services (Holdings) Ltd. All Employee Share
          Option Scheme dated as of January 23, 1998

  ##10.15 Rules of the Castle Transmission Services (Holdings) Ltd. Bonus Share
          Plan

 ###10.16 Employee Benefit Trust between Castle Transmission Services
          (Holdings) Ltd. and Castle Transmission (Trustees) Limited

  ##10.17 Castle Transmission Services (Holdings) Ltd. Unapproved Share Option
          Scheme dated as of January 23, 1998

  ##10.18 Deed of Grant of Option between Castle Transmission Series (Holdings)
          Ltd. and George Reese dated January 23, 1998

  ##10.19 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and David Ivy dated January 23, 1998

  ##10.20 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and David Ivy dated April 23, 1998

  ##10.21 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and Ted B. Miller, Jr., dated April 23, 1998

  ##10.22 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and Ted B. Miller, Jr., dated January 23, 1998

  ##10.23 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
 ###10.24 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

 ###10.25 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

   +10.26 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

   +10.27 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

 ###10.28 Rights Agreement dated as of August 21, 1998, between Crown Castle
          International Corp. and ChaseMellon Shareholder Services L.L.C.

  **10.29 Amendment No. 1 to Rights Agreement dated March 31, 1999, between
          Crown Castle International Corp. and ChaseMellon Shareholder Services
          L.L.C.

  **10.30 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
</TABLE>


                                      II-5
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
   No.                            Description of Exhibit
 --------                         ----------------------
 <C>      <S>
  ++10.31 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

  ++10.32 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
  ++10.33 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
 +++10.34 Term Loan Agreement, dated as of March 30, 2000 among Crown Castle
          International Corp., Chase Securities Inc., Goldman Sachs Credit
          Partners L.P., Syndicated Loan Funding Trust and the several Lenders
          which are parties thereto
     12.1 Statement regarding computation of ratio of earnings to fixed
          charges.

    *23.1 Consent of KPMG LLP

     23.2 Consent of Cravath, Swaine & Moore (to be included in Exhibit 5.1)

  +++27.1 Financial Data Schedule
</TABLE>
--------
<TABLE>
 <C>    <S>
      * Previously filed.
      + To be filed supplementally.
      @ Incorporated by reference to the exhibits with the corresponding
        exhibit numbers in the Registration Statement on Form S-3 previously
        filed by the Registrant (Registration No. 333-83395).
      # 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 exhibit previously filed by the
        Registrant on Form 10-K (Registration No. 000-24737) dated March 30,
        2000.
    +++ Incorporated by reference to the exhibit previously filed by the
        Registrant on Form 10-Q (Registration No. 0-24737) dated March 31,
        2000.
   #### 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.
</TABLE>

                                      II-6
<PAGE>

Item 17. Undertakings

   The undersigned Registrant hereby undertakes:

     (1) To file, during any period in which offers or sales are being made,
  a post-effective amendment to this Registration Statement:

       (i) to include any prospectus required by Section 10(a)(3) of the
    Securities Act of 1933;

       (ii) to reflect in the prospectus any facts or events arising after
    the effective date of the Registration Statement (or the most recent
    post-effective amendment thereof) which, individually or in the
    aggregate, represent a fundamental change in the information set forth
    in the Registration Statement. Notwithstanding the foregoing, any
    increase or decrease in volume of securities offered (if the total
    dollar value of securities offered would not exceed that which was
    registered) and any deviation from the low or high end of the estimated
    maximum offering range may be reflected in the form of prospectus filed
    with the Securities and Exchange Commission pursuant to Rule 424(b)
    under the Securities Act of 1933 if, in the aggregate, the changes in
    volume and price represent no more than a 20% change in the maximum
    aggregate offering price set forth in the "Calculation of Registration
    Fee" table in the effective registration statement; and

       (iii) to include any material information with respect to the plan
    of distribution not previously disclosed in the Registration Statement
    or any material change to such information in the Registration
    Statement;

  provided, however, that paragraphs (1)(i) and (1)(ii) do not apply if the
  information required to be included in a post-effective amendment by those
  paragraphs is contained in periodic reports filed by the Registrant
  pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of
  1934 that are incorporated by reference in the Registration Statement.

     (2) That, for the purpose of determining any liability under the
  Securities Act, each such post-effective amendment shall be deemed to be a
  new Registration Statement relating to the securities offered therein, and
  the offering of such securities at that time shall be deemed to be the
  initial bona fide offering thereof.

     (3) To remove from registration by means of a post-effective amendment
  any of the securities being registered which remain unsold at the
  termination of the offering.

     (4) That, for the purpose of determining any liability under the
  Securities Act, each filing of the Registrant's annual report pursuant to
  Section 13(a) or Section 15(d) of the Securities Exchange Act (and, where
  applicable, each filing of any employee benefit plan's annual report
  pursuant to Section 15(d) of the Securities Exchange Act) that is
  incorporated by reference in the Registration Statement shall be deemed to
  be a new Registration Statement relating to the securities offered therein,
  and the offering of such securities at that time shall be deemed to be the
  initial bona fide offering thereof.

   Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described in Item 15 (other than the
provisions relating to insurance), or otherwise, the Registrant has been
advised that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy expressed in the Securities Act and
is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person in connection
with the securities being registered, the Registrant will, unless in the
opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act and will be governed by the final adjudication of such issue.

                                      II-7
<PAGE>

                                   SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Houston, State of Texas,
on this 17th day of July, 2000.

                                          Crown Castle International Corp.,

                                                         *
                                          by ________________________________
                                            Name: W. Benjamin Moreland
                                            Title:  Senior Vice President,
                                                    Chief Financial Officer
                                                    and Treasurer

   Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on this 17th day of July, 2000.

<TABLE>
<CAPTION>
                      Signature                                   Title
                      ---------                                   -----

     <S>                                         <C>
                          *                      Chairman of the Board and Chief
     ___________________________________________  Executive Officer (Principal Executive
                 Ted B. Miller, Jr.               Officer)

                          *                      President, Chief Operating Officer and
     ___________________________________________  Director
                    John P. Kelly

                          *                      Senior Vice President, Chief
     ___________________________________________  Financial Officer and Treasurer
                W. Benjamin Moreland              (Principal Financial Officer)

                          *                      Senior Vice President, Chief Accounting
     ___________________________________________  Officer and Corporate Controller
                Wesley D. Cunningham              (Principal Accounting Officer)

                          *
     ___________________________________________ Vice Chairman--Global Mergers &
                    David L. Ivy                  Acquisitions and Director

                          *                      Director
     ___________________________________________
               William D. Strittmatter
</TABLE>

                                      II-8
<PAGE>

<TABLE>
<CAPTION>
                      Signature
                      ---------                           Title

     <S>                                         <C>
                          *                      Director
     ___________________________________________
                   Carl Ferenbach

                          *                      Director
     ___________________________________________
                   Randall A. Hack

                          *                      Director
     ___________________________________________
              Edward C. Hutcheson, Jr.

                          *                      Director
     ___________________________________________
                  J. Landis Martin

                          *                      Director
     ___________________________________________
                 Robert F. McKenzie

                  /s/ E. Blake Hawk
     ___________________________________________
</TABLE>            E. Blake Hawk
                  Attorney-in-Fact

                                      II-9
<PAGE>

                                 EXHIBITS INDEX

   The following exhibits are filed as a part of this Registration Statement.

<TABLE>
<CAPTION>
  Exhibit
    No.                        Description of Exhibit
  -------                      ----------------------
 <C>       <S>                                                              <C>
      @1.1 Form of Underwriting Agreement

      *2.1 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

     **2.2 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.

     **2.3 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

    ***2.4 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.

    ***2.5 Sublease dated June 1, 1999 by and among BellSouth Mobility
           Inc., Certain BMI Affiliates, Crown Castle International Corp.
           and Crown Castle South Inc.

     ++2.6 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.

     ++2.7 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 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

  *****2.9 Letter Agreement dated November 7, 1999 between GTE Wireless
           Incorporated and Crown Castle International Corp.

    ++2.10 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
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
  Exhibit
    No.                            Description of Exhibit
  -------                          ----------------------
 <C>        <S>
       #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

       #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

      @4.15 Form of Indenture
      +4.16 Form of Warrant Agreement
        5.1 Opinion of Cravath, Swaine & Moore

     ##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
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
 Exhibit
   No.                            Description of Exhibit
 -------                          ----------------------
 <C>      <S>
   ##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 Global Lease Agreement dated March 31, 1999 between Crown Atlantic
          Company LLC and Cellco Partnership, doing business as Bell Atlantic
          Mobile

  **10.10 Master Build to Suit Agreement dated March 31, 1999 between Cellco
          Partnership, doing business as BellAtlantic Mobile, and Crown
          Atlantic Company LLC

 ***10.11 Agreement to Build to Suit dated June 1, 1999 by and among BellSouth
          Mobility Inc., Crown Castle International Corp. and Crown Castle
          South Inc.

   #10.12 Castle Tower Holding Corp. 1995 Stock Option Plan (Third Restatement)

  ##10.13 Crown Castle International Corp. 1995 Stock Option Plan (Fourth
          Restatement)

  ##10.14 Castle Transmission Services (Holdings) Ltd. All Employee Share
          Option Scheme dated as of January 23, 1998

  ##10.15 Rules of the Castle Transmission Services (Holdings) Ltd. Bonus Share
          Plan

 ###10.16 Employee Benefit Trust between Castle Transmission Services
          (Holdings) Ltd. and Castle Transmission (Trustees) Limited

  ##10.17 Castle Transmission Services (Holdings) Ltd. Unapproved Share Option
          Scheme dated as of January 23, 1998

  ##10.18 Deed of Grant of Option between Castle Transmission Series (Holdings)
          Ltd. and George Reese dated January 23, 1998

  ##10.19 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and David Ivy dated January 23, 1998

  ##10.20 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and David Ivy dated April 23, 1998

  ##10.21 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and Ted B. Miller, Jr., dated April 23, 1998

  ##10.22 Deed of Grant of Option between Castle Transmission Services
          (Holdings) Ltd. and Ted B. Miller, Jr., dated January 23, 1998

  ##10.23 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
 ###10.24 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

 ###10.25 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

   +10.26 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

   +10.27 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
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
   No.                            Description of Exhibit
 --------                         ----------------------
 <C>      <S>
 ###10.28 Rights Agreement dated as of August 21, 1998, between Crown Castle
          International Corp. and ChaseMellon Shareholder Services L.L.C.

  **10.29 Amendment No. 1 to Rights Agreement dated March 31, 1999, between
          Crown Castle International Corp. and ChaseMellon Shareholder Services
          L.L.C.

  **10.30 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

  ++10.31 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
  ++10.32 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
  ++10.33 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
 +++10.34 Term Loan Agreement, dated as of March 30, 2000 among Crown Castle
          International Corp., Chase Securities Inc., Goldman Sachs Credit
          Partners L.P., Syndicated Loan Funding Trust and the several Lenders
          which are parties thereto

     12.1 Statement regarding computation of ratio of earnings to fixed
          charges.

    *23.1 Consent of KPMG LLP

     23.2 Consent of Cravath, Swaine & Moore (to be included in Exhibit 5.1)

  +++27.1 Financial Data Schedule
</TABLE>
--------
<TABLE>
 <C>    <S>
      * Previously filed.
      + To be filed supplementally.
      @ Incorporated by reference to the exhibits with the corresponding
        exhibit numbers in the Registration Statement on Form S-3 previously
        filed by the Registrant (Registration No. 333-83395).
      # 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 exhibit previously filed by the
        Registrant on Form 10-K (Registration No. 000-24737) dated March 30,
        2000.
    +++ Incorporated by reference to the exhibit previously filed by the
        Registrant on Form 10-Q (Registration No. 0-24737) dated March 31,
        2000.
   #### 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.
</TABLE>


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