AMERICAN TOWER CORP /MA/
S-3, 2000-05-26
COMMUNICATIONS SERVICES, NEC
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      As filed with the Securities and Exchange Commission on May 26, 2000
                                                 Registration No. 333-

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                           AMERICAN TOWER CORPORATION
             (Exact name of registrant as specified in its charter)

            Delaware                                        65-0723837
 (State or other jurisdiction of                        (I.R.S. Employer
 incorporation or organization)                        Identification No.)

               116 Huntington Avenue, Boston, Massachusetts 02116
    (Address, including zip code, and telephone number, including area code,
                  of registrant's principal executive offices)

                                 STEVEN B. DODGE
                           American Tower Corporation
                              116 Huntington Avenue
                           Boston, Massachusetts 02116
                                 (617) 375-7500
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                    Copy to:
                             NORMAN A. BIKALES, ESQ.
                            Sullivan & Worcester LLP
                             One Post Office Square
                           Boston, Massachusetts 02109
                                 (617) 338-2800

     Approximate date of commencement of proposed sale to the public:  From time
to time after the effective date of this registration statement as determined in
light of market conditions and other factors.
     If the only  securities  being  registered  on this form are being  offered
pursuant to dividend or interest reinvestment plans, please check the 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, 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. / /
<TABLE>
<CAPTION>
                                           CALCULATION OF REGISTRATION FEE
=================================================================================================================================
                                                                     Proposed             Proposed
                                                    Amount            Maximum              Maximum
            Title of Each Class of                  to be         Offering Price          Aggregate             Amount of
        Securities to be Registered(1)            Registered    Per Security(2)(3)  Offering Price(4)(5)   Registration Fee(4)
- ---------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>                                    <C>                     <C>

Debt Securities(6)
Preferred Stock, par value $.01 per share....
Depositary Shares Representing Preferred
Stock....
Class A Common Stock, par value $.01 per
share(7)
Warrants.....................................
Total                                           $1,000,000,000                         $1,000,000,000          $264,000(8)
=================================================================================================================================
                                                       (Footnotes on next page)
</TABLE>




<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 of 1933 or until this  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.

(1)  The Debt Securities,  Preferred Stock,  Depositary  Shares,  Class A Common
     Stock and/or Warrants  covered hereby are  collectively  referred to as the
     "Offered  Securities." Offered Securities  registered hereunder may be sold
     separately,  together or as units with other Offered Securities  registered
     hereunder. Subject to Footnote (4), there are being registered hereunder an
     indeterminate  principal  amount of Offered  Securities as may be sold from
     time to time by the  registrant.  This  Registration  Statement also covers
     contracts that may be issued by the registrant under which the counterparty
     may be required to purchase  Offered  Securities.  Such contracts  would be
     issued with Offered Securities.  There are also being registered  hereunder
     an indeterminate  principal amount of Offered Securities as may be issuable
     upon conversion or exchange of Debt Securities, Preferred Stock or Warrants
     or pursuant to antidilution provisions thereof.

(2)  In U.S. Dollars or the equivalent thereof in one or more foreign currencies
     or currency units or composite currencies,  including the European Currency
     Unit.

(3)  The proposed  maximum  offering price per unit will be determined from time
     to time by the registrant in connection with the issuance by the registrant
     of the securities registered hereunder.

(4)  Estimated  solely  for the  purpose of  calculating  the  registration  fee
     pursuant to Rule 457(o).  In no event will the aggregate  initial  offering
     price of the Offered  Securities  issued under the  Registration  Statement
     exceed  $1,000,000,000 or the equivalent  thereof in one or more foreign or
     composite currencies.

(5)  No separate  consideration  will be received  for Debt  Securities,  Common
     Stock, Preferred Stock or Depositary Shares that are issued upon conversion
     of Debt Securities, Preferred Stock or Depositary Stock.

(6)  If any such Debt Securities are issued at an original issue discount,  then
     the  offering  price  shall be in such  greater  principal  amount as shall
     result in an aggregate initial offering price of up to $1,000,000,000.

(7)  The  aggregate  amount of Common Stock  registered  hereunder is limited to
     that which is permissible  under Rule 415(a)(4) under the Securities Act of
     1933, as amended.

(8)  Calculated  pursuant to Rule 457(o) of the rules and regulations  under the
     Securities Act of 1933, as amended.

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

<PAGE>
The information contained in this Prospectus is not complete and may be changed.
We may not sell these securities until the related registration  statement filed
with the Securities and Exchange Commission is effective. This Prospectus is not
an offer to sell nor is it seeking an offer to buy these securities in any state
where the offer or sale is not permitted.

                   SUBJECT TO COMPLETION, DATED MAY 26, 2000

PROSPECTUS

                                 $1,000,000,000

                                     [LOGO]

                           American Tower Corporation

              Debt Securities, Preferred Stock, Depositary Shares,
                        Class A Common Stock and Warrants
                             ----------------------

     We may from time to time offer:

o    debt securities,

o    shares of our preferred stock,

o    fractional shares of our preferred stock in the form of depositary shares,

o    shares of our Class A common stock, or

o    warrants to purchase any of these securities.

     The securities we offer will have an aggregate  public offering price of up
to $1,000,000,000.

     We will show the particular securities we offer and their specific terms in
a  supplement  to this  document.  In each case we would  describe  the type and
amount of securities we are offering, the initial public offering price, and the
other terms of the offering.

     Our Class A common stock is listed on the New York Stock Exchange under the
symbol  "AMT." We will  make  application  to list any  shares of Class A common
stock sold pursuant to a supplement to this  prospectus on the NYSE. We have not
determined  whether we will list any of the other securities we may offer on any
exchange  or  over-the-counter  market.  If we  decide  to seek  listing  of any
securities, the supplement will disclose the exchange or market.

     Investing in our securities involves risks. See "Risk Factors" beginning on
page 1.

     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or disapproved of these securities or determined if this
prospectus  is truthful or  complete.  Any  representation  to the contrary is a
criminal offense.

     We may offer the securities  directly,  through agents designated from time
to  time by us or to or  through  underwriters  or  dealers.  We will  show in a
supplement the names of any agents or  underwriters  involved in the sale of any
securities.  We will also  describe  any  applicable  purchase  price and fee or
commission or discount arrangement between or among us and/or them. See "Plan of
Distribution"  on page 20. We may not sell any securities  without delivery of a
supplement describing the method and terms of the offering of the securities.

     Our  principal  place  of  business  is  116  Huntington  Avenue,   Boston,
Massachusetts 02116 and our telephone number is (617) 375-7500.


                     The date of this prospectus is      , 2000
<PAGE>
                  TABLE OF CONTENTS

    About This Prospectus........................ (i)
    Cautionary Note Regarding Forward-
         Looking Statements...................... (i)
    American Tower...............................  1
    Risk Factors.................................  1
    Ratio of Earnings to Fixed Charges...........  5
    Use of Proceeds..............................  5
    Description of Certain Indebtedness..........  5
    Description of Debt Securities...............  7
    Description of Capital Stock................. 12

    Description of Depositary Shares............. 16
    Description of Warrants...................... 19
    Plan of Distribution......................... 20
    Validity of the Offered Securities........... 21
    Experts...................................... 21
    Where You Can Find More Information.......... 22
    Documents Incorporated By Reference.......... 22

    You  should  rely  only on the  information  incorporated  by  reference  or
provided in this  document.  We have not  authorized  anyone else to provide you
with different  information.  We are not making an offer of these  securities in
any  jurisdiction  where  it  is  unlawful.  You  should  not  assume  that  the
information in this prospectus is accurate as of any date other than the date on
the front of this document.

                              ABOUT THIS PROSPECTUS

    This  prospectus is part of a  registration  statement we filed with the SEC
using a "shelf" registration process.  Under this shelf process, we may sell any
combination  of the  securities  described  in  this  prospectus  in one of more
offerings  up to a  total  dollar  amount  of  proceeds  of $1.0  billion.  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
containing 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 under the heading "Where You Can
Find More Information" and "Documents Incorporated By Reference."

              CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

    We have made and  incorporated  by reference  forward-looking  statements in
this document.  Forward-looking  statements  include those  regarding our goals,
beliefs,  plans or current expectations and other statements contained regarding
matters  that are not  historical  facts.  For  example,  when we use the  words
believe,   expect,   anticipate   or   similar   expressions,   we  are   making
forward-looking   statements.   Forward-looking  statements  include  statements
concerning:

o    the outcome of our growth strategy,

o    future results of operations,

o    liquidity and capital expenditures,

o    construction and acquisition activities,

o    debt levels and the ability to obtain  financing  and make  payments on our
     debt,

o    regulatory  developments and competitive  conditions in the  communications
     site and wireless carrier industries,

o    projected  growth  of the  wireless  communications  and  wireless  carrier
     industries,

o    dependence on demand for satellites for Internet data transmission, and

o    general economic conditions.

    Our forward-looking  statements are subject to risks and uncertainties.  You
should note that many  factors,  some of which are  discussed  elsewhere in this
prospectus or in the documents we have  incorporated by reference,  could affect
us in the future and could  cause our  results to differ  materially  from those
expressed in our forward-looking  statements.  For a discussion of some of these
factors, please read carefully the information under "Risk Factors" beginning on
page 1. We are not required to release  publicly the results of any revisions to
these  forward-looking  statements  we may  make to  reflect  future  events  or
circumstances.

                                      -i-
<PAGE>
                                 AMERICAN TOWER

     We are a  wireless  communications  and  broadcast  infrastructure  company
operating in three business segments.

o    We operate a leading network of  communications  towers and are the largest
     independent operator of broadcast towers in North America. Giving effect as
     of May 26, 2000 to our pending  transactions,  we have approximately 10,400
     multi-user  sites  in the  United  States,  Mexico  and  Canada,  including
     approximately 300 broadcast tower sites.

o    We provide  comprehensive network development services for wireless service
     providers  and  broadcasters.  We offer full  turnkey  network  development
     solutions to our  customers,  consisting  of radio  frequency  engineering,
     network design,  site acquisition,  zoning and other regulatory  approvals,
     construction management, tower construction and antenna installation.

o    We operate a leading teleport business,  which transmits  Internet,  voice,
     data  and  video  communications   worldwide.  We  have  approximately  160
     satellite  antennas in various  locations  across the United  States,  with
     major facilities near New York, Washington, D.C., Dallas and San Francisco,
     as well as the Northeast, Southwest and Pacific Northwest, giving effect as
     of May 26, 2000 to our pending transactions.

     We estimate that our three  business  segments  accounted for the following
percentages of pro forma 1999 operating revenues:

o    Rental and management--53.0%,

o    Network development services--27.0%, and

o    Internet, voice, data and video transmission services--20.0%.

                                  RISK FACTORS

    You should consider carefully the following factors and other information in
this prospectus before deciding to invest in our securities.

If we cannot keep raising capital, our growth will be impeded.

    Without  additional  capital,  we would need to curtail our  acquisition and
construction  programs.  We expect to use borrowed  funds to satisfy most of our
capital  needs.  However,  we must continue to satisfy  financial  ratios and to
comply with financial and other covenants in order to do so. If our revenues and
cash flow do not meet  expectations,  we may lose our  ability to borrow  money.
These same factors, as well as market conditions beyond our control,  could make
it  difficult or  impossible  for us to sell  securities  as an  alternative  to
borrowing.

Meeting payments on our large debt could be a burden to us.

    Our high debt level makes us vulnerable to downturns in our operations. This
high debt level  requires us to use most of our cash flow to make  interest  and
principal  payments.  If we do not  generate  sufficient  cash flow  through our
operations  to make interest and  principal  payments,  we may be forced to sell
debt or equity securities or sell some of our core assets. This could be harmful
to our business and our securityholders.  Market conditions or our own financial
situation may require us to make these sales on unattractive terms.

Demand for tower space may be beyond our control.

    Many of the factors  affecting the demand for tower space, and therefore our
cash flow, are beyond our control. Those factors include:

o    consumer demand for wireless services,

o    the financial  condition of wireless service providers and their preference
     for owning or leasing antennae sites,

o    the growth  rate of wireless  communications  or of a  particular  wireless
     segment,

o    the  number  of  wireless  service  providers  in  a  particular   segment,
     nationally or locally,

                                      -1-
<PAGE>
o    governmental licensing of broadcast rights,

o    zoning, environmental and other government regulations, and

o    technological changes.

    Roaming and resale  arrangements  could also adversely affect demand.  These
arrangements  enable a wireless service provider to serve customers  outside its
license area through  agreements with other providers.  Wireless providers might
consider roaming and resale arrangements preferable to leasing antennae space.

New  tower   construction,   particularly   build-to-suit   projects,   involves
uncontrollable risks and increasing competition.

    Our increasing  focus on major  build-to-suit  projects for wireless service
providers  entails  several unique risks.  First is our greater  dependence on a
limited  number of  customers.  In addition,  although we have the benefit of an
anchor tenant in build-to-suit projects, we may not be able to find a sufficient
number of additional tenants. In fact, one reason wireless service providers may
prefer  build-to-suit  arrangements  is to  share  or  escape  the  costs  of an
undesirable  site. A site may be  undesirable  because it has high  construction
costs or may be considered a poor location by other providers.

    Our expanded  construction  activities also involve other substantial risks.
These risks include:

o   increasing our debt and the amount of payments on that debt,

o   uncontrollable risks that could delay or increase the cost of a project,

o   increasing   competition  for  construction   sites  and  experienced  tower
    construction companies,  resulting in significantly higher costs and failure
    to meet time schedules,

o   failure to meet time schedules  that could result in our paying  significant
    penalties to prospective tenants,  particularly in build-to-suit situations,
    and

o   possible  lack of  sufficient  experienced  personnel  to manage an expanded
    construction  program.  We cannot control the main factors that can prevent,
    delay or increase the cost of construction. These factors include:

o   zoning and local permitting requirements,

o   environmental group opposition,

o   availability of skilled construction personnel and construction equipment,

o   adverse weather conditions, and

o   federal regulations.

Our acquisition strategy involves increasing acquisition costs, high debt levels
and potential management and integration issues.

    Increased  competition,  which we believe  will  continue,  has  resulted in
substantially  higher acquisition  costs,  particularly for towers being sold by
wireless service providers.  These prices, in turn, result in high debt and debt
service requirements.  Equally important, the increased size of our acquisitions
from wireless  service  providers could create problems we have not faced in the
past. These include:

o   dependence on a limited number of customers,

o   lease and control provisions more favorable to the wireless service provider
    than those we give our tenants generally,

o   integration of major national networks into our operational systems,

o   demands on managerial personnel that could divert their attention from other
    aspects of our business, and

o   potential antitrust constraints, either in local markets or on a regional or
    national basis,  that could impede future  acquisitions or require selective
    divestitures at unfavorable prices.

    An additional risk is the acquisition of significant  numbers of towers that
may have limited marketing potential.  For example, towers may not be marketable
because of location.

Covenants in our credit facilities could impede our growth strategy and restrict
our ability to pay interest on or redeem our notes.

    Our growth  strategy may be impaired by restrictive  covenants in our credit
facilities.  The  most  significant  of these  covenants  impose  limits  on our
aggregate  borrowings,  including  in the case of

                                      -2-
<PAGE>
American Tower,  the parent company,  the type and amount of borrowings.  We are
also  required  to meet  certain  financial  ratios and  comply  with all of the
financial  and  other  covenants  in order to  borrow  funds.  Certain  types of
acquisitions  and investments in other companies are limited.  Events beyond our
control may affect our ability to meet these  requirements.  If these  covenants
restrict our ability to borrow  funds,  acquisitions  and  construction  will be
impeded.

    Our credit  facilities also restrict the ability of our  subsidiaries to pay
dividends or make other  distributions  to us and prohibit  those  dividends and
other distributions  during periods of default.  Since we are a holding company,
with no independent  operations,  we are dependent on our subsidiaries for funds
to pay interest and  principal on our notes,  including  any debt  securities we
offer pursuant to this prospectus. In addition, our credit facilities require us
to invest  100% of all debt and  equity  offerings,  public or  private,  in our
borrower subsidiaries.

    Our existing  credit  facilities  prohibit us from redeeming or repurchasing
any currently outstanding notes for cash. This will probably require us to elect
to  repurchase  currently  outstanding  notes with  Class A common  stock on the
repurchase  dates and to obtain lender consent in order to repurchase  currently
outstanding notes upon any change in control.  This same limitation could impact
our ability to redeem or repurchase any securities we may offer pursuant to this
prospectus.

We are dependent on key personnel and would be hurt if they leave.

    The  loss of our  chief  executive  officer,  Steven  B.  Dodge,  and  other
executive  officers has a greater likelihood of having a material adverse effect
upon us than it would on most other  companies of our size. Our growth  strategy
is  highly  dependent  on the  efforts  of Mr.  Dodge  and our  other  executive
officers. Our ability to raise capital is dependent in part on the reputation of
Mr.  Dodge.  You  should  be aware  that we have  not  entered  into  employment
agreements with Mr. Dodge or most of our other executive officers. We may not be
able  to  retain  our  executive  officers,   including  those  with  employment
agreements,  or other key  personnel or prevent them from  competing  with us if
they did leave.

Expanding operations into foreign countries could create certain operational and
financial risks.

    Our recent  expansion  into Canada and Mexico,  and other  possible  foreign
operations in the future,  could result in adverse  financial  consequences  and
operational  problems  not  experienced  in the  United  States.  We have made a
substantial  loan to a Mexican  company and are committed to construct a sizable
number of towers in that  country.  We have also  invested  in a Canadian  joint
venture that intends to acquire and  construct  towers in that  country.  We may
also, in the future, engage in comparable transactions in other countries. Among
the risks of foreign  operations are governmental  expropriation and regulation,
inability  to  repatriate  earnings  or  other  funds,  currency   fluctuations,
difficulty  in  recruiting   trained   personnel,   and  language  and  cultural
differences that could impair management control and operations.

New technologies could make our tower antenna leasing services less desirable to
potential tenants.

    Mobile  satellite  systems and other new  technologies  could  compete  with
land-based  wireless  communications  systems,  thereby  reducing the demand for
tower lease space and other  services  we  provide.  The Federal  Communications
Commission  has granted  license  applications  for several  low-earth  orbiting
satellite systems that are intended to provide mobile voice or data services. In
addition,   the  emergence  of  new  technologies  could  reduce  the  need  for
tower-based  transmission  and  reception  and  have an  adverse  affect  on our
operations.

    The development and implementation of signal combining  technologies,  which
permit one  antenna to  service  two  different  transmission  frequencies  and,
thereby,  two  customers,   may  reduce  the  need  for  tower-based   broadcast
transmission  and hence demand for our antenna space.  The growth in delivery of
video services by direct broadcast satellites could also adversely affect demand
for our antenna space.

Demand  for  teleport  services  is subject to  technological,  competitive  and
regulatory factors beyond our control.

    Demand  for  teleport  services  by its  primary  historical  base of  video
customers  has  been  diverted  to fiber  optic  transmission  services  in some
instances.   Teleport  transmission  services  for  Internet-related   entities,
however,  have increased.  Revenues from these new technologies may not continue
to grow  and

                                      -3-
<PAGE>
may  decline if other  forms of  transmission,  fiber  optic or  otherwise,  are
introduced.  In addition,  our teleport satellite  operations are dependent upon
maintaining valid FCC licensing.

We  could  be  harmed  if  perceived  health  risks  from  radio  emissions  are
substantiated.

    If a  connection  between  radio  emissions  and  possible  negative  health
effects,  including  cancer,  were  established,  we  would  be  materially  and
adversely affected. The results of several substantial studies by the scientific
community in recent years have been inconclusive. We and the lessees of antennae
sites on our towers are  subject to  government  regulations  relating  to radio
frequency emissions.  We do not maintain any significant  insurance with respect
to these matters.

Pro forma  financial  information is based on estimates and  assumptions and may
not be indicative of actual future results.

    Our actual future  results could vary  materially  and adversely  from those
reflected  in the  pro  forma  financial  information  we have  incorporated  by
reference  in this  prospectus.  That  information  is based  upon a  number  of
assumptions  we  believe to be  reasonable.  However,  our two most  significant
acquisitions  to date,  the AirTouch and AT&T  transactions,  do not involve the
acquisition  of  businesses.  The towers  involved  in those  acquisitions  were
operated as part of the wireless  service  divisions of AirTouch and AT&T. Those
companies  did not  maintain  extensive  separate  financial  records or prepare
financial  statements  for the  operation  of those  towers.  We have,  however,
compiled  certain  revenue  and  expense  data of those  towers in the pro forma
information. In the case of certain expenses, we have estimated amounts based on
both  the  limited  information  by the  carriers  and our own  experience  with
comparable towers. Neither our auditors, AirTouch's auditors nor AT&T's auditors
have  expressed  any opinion or provided any form of  assurance  with respect to
AirTouch's  or AT&T's  historical  data  presented  in the  unaudited  pro forma
financial information.

We could have liability under environmental laws.

    Under various federal,  state and local environmental laws, we, as an owner,
lessee or operator of real estate,  may be liable for the  substantive  costs of
remediating soil and groundwater contaminated by hazardous wastes. Some of these
laws  impose  responsibility  and  liability  on us even if we did not cause the
contamination  or even  know  about  it.  Almost  all of the  towers  we own and
operate, other than roof top towers, are located on parcels of land, which could
result in substantial environmental liability. Our liability often will continue
even if we sell the property.

The debt  will  effectively  rank  junior  to  secured  debt  under  our  credit
facilities.

     Our  payment  of  principal  and  interest  on any debt we may  issue  will
effectively  rank  junior to all  existing  and  future  debt  under our  credit
facilities. This is so because the debt under our credit facilities is issued or
guaranteed by our  subsidiaries  and secured by their assets.  Any debt we issue
will also  effectively  rank junior to all other existing and future debt of our
subsidiaries.  We have also  guaranteed  that debt and secured our guaranty with
our assets,  including the stock of our subsidiaries.  As a result, in the event
of our insolvency,  liquidation or reorganization, or should any of that debt be
accelerated  because of a default,  we must pay that debt in full  before we can
make any payment on any debt we may sell publicly.

No trading market may exist for any offered securities other than Class A common
stock.

     No trading  market  for any  offered  securities  other than Class A common
stock may exist and one may never develop.  Accordingly,  you may not be able to
sell those  securities or sell them at an acceptable  price. If a market were to
develop,  those offered  securities  could trade at prices that may be higher or
lower than your purchase price depending on many factors,  including  prevailing
interest rates, our operating results,  the market for similar securities,  and,
if those  securities are  convertible or  exchangeable,  the market price of the
Class A common stock. We do not intend to list any offered securities other than
Class  A  common  stock  on any  securities  exchange  or to seek  approval  for
quotation through any automated  quotation  system.  One or more of the managing
underwriters,  if  any,  may  decide  to  make a  market  in the  those  offered
securities.  They would not, however,  be obligated to do so and may discontinue
market  making at any time.  Therefore,  any  liquidity  may disappear and those
offered securities may not be readily marketable.

                                      -4-
<PAGE>
Control by our  principal  stockholders  could deter mergers where you could get
more than current market price for your stock.

    Control by Mr. Dodge and others may have the effect of discouraging a merger
or other  takeover of our company in which holders of common stock may be paid a
premium for their shares over then-current  market prices.  Mr. Dodge,  together
with a limited number of our directors, may be able to control or block the vote
on mergers and other matters submitted to the common stockholders.

Our common stock does not pay dividends.

    We have never paid a dividend  on our common  stock and do not expect to pay
cash dividends in the foreseeable  future.  In addition,  our credit  facilities
effectively  restrict the payment of cash dividends or other  distributions  and
the repurchase, redemption or other acquisition of equity securities.

                                RATIO OF EARNINGS
                                TO FIXED CHARGES

    For  purposes of  calculating  this ratio,  earnings  consist of loss before
income taxes and extraordinary  losses and fixed charges.  Fixed charges consist
of capitalized  interest,  interest  expense,  amortization of debt discount and
related  issuance  costs and the  component of rental  expense  that  management
believes to be  representative  of the interest factor on that expense.  For the
year ended December 31, 1998,  interest  expense included  redeemable  preferred
stock dividends of $3.1 million. For each of the periods listed below, our ratio
of  earnings  to fixed  charges  was less than  1.0:1.  We had a  deficiency  in
earnings to fixed charges in each period as follows (amounts in thousands):

                   Period                     Deficiency
                   ------                     ----------
Period from July 17, 1995 (incorp-
   oration) to December 31, 1995........        $ 184
Year ended December 31, 1996............          434
Year ended December 31, 1997............        2,507
Year ended December 31, 1998............       43,844
Year ended December 31, 1999............       52,520
Three months ended March 31, 2000.......       53,595

                                 USE OF PROCEEDS

    We  expect  to use net  proceeds  from  the sale of the  offered  securities
primarily to finance construction and acquisitions.  We also expect to use those
proceeds to finance general working capital  requirements,  including  repayment
from time to time of borrowings under our credit  facilities.  Any borrowings so
repaid may be available in the future to finance  construction  and acquisitions
and other general  corporate  purposes.  We intend to continue  actively seeking
construction  and  acquisition  prospects,  including  acquisitions of companies
outside  of the  United  States  engaged  in  businesses  related  to the  tower
communications business in which we are not presently engaged.

                                 DESCRIPTION OF
                              CERTAIN INDEBTEDNESS

Credit Facilities

    The description  below  summarizes the more important terms of our borrowing
arrangements,  as  currently  in  effect,  which  we  refer  to  as  the  credit
facilities.  We have previously filed copies of the loan agreement governing the
credit  facilities with the SEC. See "Where You Can Find More  Information." You
should refer to that agreement for the complete terms of the credit  facilities.
Capitalized  words  used in the  description  below  have  specialized  meanings
defined in that agreement.

    Several of our principal operating  subsidiaries have borrowed and expect to
continue  to borrow  under the credit  facilities.  We refer to those  borrowers
collectively as the borrower subsidiaries.  The credit facilities provide for up
to $2.0  billion of loans,  the  funding of which has been  committed  to by the
lenders. The credit facilities also contemplate  possible additional  borrowings
of up to $500.0  million,  although the lenders are not  committed to fund those
borrowings.  Borrowings under the credit  facilities are limited by (a) the cash
flow of the borrower  subsidiaries  and the Restricted  Subsidiaries,  (b) their
construction  costs  of  Developing  Towers,  and (c) the  aggregate  number  of
Developing Towers and AirTouch towers we acquire.

    The credit facility is made up of three separate types of loans:

o   a $650.0 million  reducing  revolving  credit facility  maturing on June 30,
    2007,

                                      -5-
<PAGE>
o   an $850.0 million multiple-draw term loan maturing on June 30, 2007, and

o   a $500.0 million term loan maturing on December 31, 2007.

    We are required to reduce the revolving  credit  commitments and to amortize
the term loans  quarterly,  commencing  March 31, 2003,  in  increasing  amounts
designed  to repay  the loans by  maturity.  We are also  required  to repay the
loans, and reduce the commitments,  out of the proceeds of asset sales and sales
of equity or debt securities,  by us or our subsidiaries,  and out of cash flow.
We can repay the loans voluntarily at any time, without penalty.

    We may incur  indebtedness  under the credit  facilities  for  acquisitions,
construction  and  other  capital  expenditures,  working  capital  and  general
corporate purposes.

    The credit facilities require compliance with financial coverage ratios that
measure Annualized Operating Cash Flow against Total Debt, Interest Expense, Pro
Forma Debt  Service  and Fixed  Charges.  The credit  facilities  contain  other
financial  and  operational  covenants  and other  restrictions  with  which the
borrower  subsidiaries and the Restricted  Subsidiaries must comply,  whether or
not there are any borrowings outstanding.  These include restrictions on certain
types of acquisitions, other than towers and communications sites, indebtedness,
liens, capital expenditures,  investments in Unrestricted Subsidiaries,  and the
ability of the borrower  subsidiaries  and the  Restricted  Subsidiaries  to pay
dividends or make other distributions.

    The credit  facilities  include two events of default that restrict American
Tower, the parent company:

o   it cannot have any  Indebtedness for Money Borrowed  outstanding  other than
    (a) the convertible  notes issued in October 1999 and February 2000, and (b)
    other  Indebtedness  for Money Borrowed in an aggregate amount not to exceed
    $500.0 million and containing certain terms, and

o   it is required to invest the net cash proceeds of any issue of Capital Stock
    (other than pursuant to permitted  acquisitions and up to $2.0 million under
    stock option plans) or Indebtedness as equity in the borrower subsidiaries.

    Our permitted  Indebtedness  for Money  Borrowed must (a) be unsecured,  (b)
have no  scheduled  payments of principal  prior to June 30,  2008,  (c) have no
required  cash  payments  of interest  and (d) have other  terms and  conditions
reasonably satisfactory to the Majority Lenders.

    We and the Restricted Subsidiaries have guaranteed all of the loans. We have
secured  the  loans  by  liens  on  substantially  all  assets  of the  borrower
subsidiaries and the Restricted  Subsidiaries and all outstanding  capital stock
and other debt and equity interests of our direct and indirect subsidiaries.

Convertible Notes

    In October 1999, we issued 6.25%  Convertible Notes due 2009 in an aggregate
principal  amount of $300.0 million and 2.25%  Convertible  Notes due 2009 at an
issue price of $300.1 million,  representing 70.52% of their principal amount at
maturity of $425.5 million.  In February 2000, we issued 5.00% Convertible Notes
due 2010 in an aggregate  principal  amount of $450.0  million.  We will accrete
each year as interest expense in our financial statements the difference between
the issue price and the  principal  amount at maturity of the 2.25%  notes.  The
6.25% notes are convertible  into shares of Class A common stock at a conversion
price of $24.40 per share.  The 2.25% notes are convertible into shares of Class
A common  stock at a conversion  price of $24.00 per share.  The 5.00% notes are
convertible  into shares of Class A common stock at a conversion price of $51.50
per share. The conversion  prices are subject to adjustment in certain customary
circumstances.

    We may not redeem the 6.25% notes prior to October 22, 2002. Thereafter,  we
may redeem those notes, at our option, in whole or in part at a redemption price
initially of 103.125% of the principal  amount.  The  redemption  price declines
ratably  immediately  after  October  15 of each  following  year to 100% of the
principal amount in 2005. We may not redeem the 2.25% notes prior to October 22,
2003. Thereafter,  we may redeem those notes, at our option, in whole or in part
at increasing  redemption  prices designed to reflect the accrued original issue
discount.  We may not  redeem  the  5.00%  notes  prior to  February  20,  2003.
Thereafter,  we may redeem those notes, at our option,  in whole or in part at a
redemption  price initially of 102.50% of the principal  amount.  The redemption
price declines ratably  immediately  after February 15 of each following year to
100% of the  principal  amount in 2006.  We are also required to pay accrued and
unpaid interest in all redemptions of any series of notes.

                                      -6-
<PAGE>
    Holders  may  require us to  repurchase  all or any of their  6.25% notes on
October 22, 2006 at their  principal  amount,  together  with accrued and unpaid
interest.  Holders may require us to repurchase  all or any of their 2.25% notes
on October 22, 2003 at those notes'  issue price plus  accreted  original  issue
discount,  together with accrued and unpaid interest.  Holders may require us to
repurchase  all or any of  their  5.00%  notes  on  February  20,  2007 at their
principal  amount,  together  with accrued and unpaid  interest.  We may, at our
option,  elect to pay the  repurchase  price of any  series in cash or shares of
Class A common stock, or any combination thereof. Our credit facilities restrict
our ability to repurchase these notes for cash.

    The  indentures  under which these notes are  outstanding do not contain any
restrictions on the payment of dividends, the incurrence of debt or liens or the
repurchase of our equity securities or any financial  covenants.  Neither series
of notes is entitled to the benefit of any sinking  fund.  The 6.25% notes,  the
2.25%  notes and the 5.00%  notes are junior to our credit  facilities  and rank
equally with each other.

                                 DESCRIPTION OF
                                 DEBT SECURITIES

    The debt securities will be our unsecured  direct  obligations.  They may be
senior or  subordinated  indebtedness.  The debt securities will be issued under
one or more indentures  between us and a trustee.  Any indenture will be subject
to, and governed by, the Trust Indenture Act of 1939, as amended. The statements
made in this prospectus  relating to any indenture and the debt securities to be
issued under any indenture are  summaries of certain  anticipated  provisions of
the  indentures,  do not  purport to be  complete  and are  subject  to, and are
qualified in their  entirety by reference to, all  provisions of the  indentures
and the debt securities.

General

    We have  filed  with the  registration  statement  relating  to the  offered
securities a form of indenture  relating to our senior  securities and a form of
indenture  relating  to our  senior  subordinated  securities  and  subordinated
securities. Our senior debt securities will rank equally and ratably in right of
payment with other  indebtedness of ours that is not  subordinated.  If we issue
subordinated  debt securities,  they will be subordinated in right of payment to
the prior payment in full of senior  indebtedness,  as defined in the applicable
prospectus  supplement,  and  may  rank  equally  and  ratably  with  any  other
subordinated  indebtedness.  They may, however, also be subordinated in right of
payment to senior subordinated securities. See "--Subordination."

    We may issue the debt  securities  without  limit as to aggregate  principal
amount,  in one or more series, in each case as established from time to time in
or pursuant to authority granted by a resolution of our board of directors or as
established in one or more supplemental  indentures.  We need not issue all debt
securities of one series at the same time. Unless we otherwise  provide,  we may
reopen a  series,  without  the  consent  of the  holders  of such  series,  for
issuances of additional securities of that series.

    We  anticipate  that any  indenture  will provide that we may, but need not,
designate more than one trustee under an indenture,  each with respect to one or
more series of debt securities. Any trustee under any indenture may resign or be
removed with respect to one or more series of debt  securities,  and a successor
trustee may be appointed to act with respect to that series.

    The  applicable  prospectus  supplement  will  describe the  specific  terms
relating  to the  series of debt  securities  we will  offer,  including,  where
applicable, the following:

o   the title and series  designation  and whether  they are senior  securities,
    senior subordinated securities or subordinated securities,

o   the aggregate principal amount of the securities,

o   the  percentage  of the  principal  amount  at which we will  issue the debt
    securities and, if other than the principal  amount of the debt  securities,
    the portion of the  principal  amount of the debt  securities  payable  upon
    declaration of acceleration of the maturity of the debt securities,

o   if convertible,  the initial conversion price, the conversion period and any
    other terms governing such conversion,

o   the stated maturity date,

o   any fixed or variable interest rate or rates per annum,

o   the date from which interest may accrue and any interest payment dates,

                                      -7-
<PAGE>
o   any sinking fund requirements,

o   any  provisions  for  redemption,  including  the  redemption  price and any
    remarketing arrangements,

o   whether the securities  are  denominated or payable in United States dollars
    or a foreign currency or units of two or more foreign currencies,

o   the  events of  default  and  covenants  of such  securities,  to the extent
    different from or in addition to those described in this prospectus,

o   whether we will issue the debt securities in certificated  and/or book-entry
    form,

o   whether the debt  securities will be in registered or bearer form and, if in
    registered form, the denominations if other than in even multiples of $1,000
    and, if in bearer form, the denominations and terms and conditions  relating
    thereto,

o   whether we will issue any of the debt  securities  in permanent  global form
    and, if so, the terms and  conditions,  if any, upon which  interests in the
    global  security may be exchanged,  in whole or in part,  for the individual
    debt securities represented by the global security,

o   the  applicability,  if  any,  of the  defeasance  and  covenant  defeasance
    provisions described in this prospectus or any prospectus supplement,

o   whether we will pay  additional  amounts on the securities in respect of any
    tax,  assessment or governmental charge and, if so, whether we will have the
    option to redeem the debt securities instead of making this payment, and

o   the subordination provisions, if any, relating to the debt securities.

    We may issue debt securities at less than the principal  amount payable upon
maturity (we refer to these securities as "original issue discount securities").
If  material  or  applicable,  we will  describe  in the  applicable  prospectus
supplement special U.S. federal income tax, accounting and other  considerations
applicable to original issue discount securities.

    Except as described under "--Merger,  Consolidation or Sale of Assets" or as
may be set forth in any prospectus supplement, an indenture will not contain any
other  provisions  that would  limit our ability to incur  indebtedness  or that
would afford holders of the debt securities  protection in the event of a highly
leveraged  or similar  transaction  involving  us or in the event of a change of
control.  You should review carefully the applicable  prospectus  supplement for
information  with respect to events of default and  covenants  applicable to the
securities being offered.

Denominations, Interest, Registration and Transfer

    Unless otherwise described in the applicable prospectus supplement,  we will
issue the debt  securities  of any  series  that are  registered  securities  in
denominations  that are even multiples of $1,000,  other than global securities,
which may be of any denomination.

    Unless otherwise specified in the applicable prospectus supplement,  we will
pay the interest on and principal of and premium, if any, on any debt securities
at the corporate  trust office of the trustee.  At our option,  however,  we may
make payment of interest by check  mailed to the address of the person  entitled
to the payment as it appears in the  applicable  register or by wire transfer of
funds to that person at an account maintained within the United States.

    If we do not  punctually  pay or duly  provide for  interest on any interest
payment date, the defaulted interest will be paid either:

o   to the person in whose name the debt  security is registered at the close of
    business on a special record date to be fixed by the applicable trustee or

o   in  any  other  lawful  manner,  all as  more  completely  described  in the
    applicable indenture.

    You may have your debt  securities  broken  into  more  debt  securities  of
smaller   denominations  or  combined  into  fewer  debt  securities  of  larger
denominations,  as long as the total  principal  amount is not changed.  This is
called an "exchange."

    You may exchange or transfer  debt  securities at the office of the trustee.
The trustee acts as our agent for  registering  debt  securities in the names of
holders and  transferring  debt  securities.  We may change this  appointment to
another  entity or  perform it  ourselves.  The  entity  performing  the role of
maintaining the list of registered  holders is called the "security  registrar."
It will also perform transfers.

                                      -8-
<PAGE>
    You will not be  required  to pay a service  charge to  transfer or exchange
debt  securities,  but  you  may  be  required  to pay  for  any  tax  or  other
governmental  charge  associated  with the  exchange or  transfer.  The security
registrar  will make the transfer or exchange only if it is satisfied  with your
proof of ownership.

Merger, Consolidation or Sale of Assets

    Under any indenture, we are generally permitted to consolidate or merge with
another company.  We are also permitted to sell  substantially all of our assets
to  another  company,  or to buy  substantially  all of the  assets  of  another
company.  However, we may not take any of these actions unless all the following
conditions are met:

o   If we merge out of existence or sell our assets, the other company must be a
    corporation, partnership or other entity organized under the laws of a State
    or the District of Columbia or under  federal  law.  The other  company must
    agree to be legally responsible for the debt securities.

o   The merger,  sale of assets or other transaction must not cause a default on
    the debt securities.  In addition, we must not already be in default, unless
    the merger or other transaction  would cure the default.  A default for this
    purpose  would  include  any event  that would be an event of default if the
    requirements for giving us default notice or our default having to exist for
    a specific period of time were disregarded.

Events of Default and Related Matters

    Events of Default.  The term "event of default" means any of the following:

o   We do not pay the  principal  or any  premium on a debt  security on its due
    date.

o   We do not pay interest on a debt security within 30 days of its due date.

o   We do not deposit any sinking fund payment on its due date.

o   We remain in breach of any other  term of the  applicable  indenture  for 60
    days after we receive a notice of default  stating we are in breach.  Either
    the trustee or holders of 25% of the principal  amount of debt securities of
    the affected series may send the notice.

o   We file for bankruptcy or certain other events in bankruptcy,  insolvency or
    reorganization occur.

o   Any other event of default described in the applicable prospectus supplement
    occurs.

    Remedies If an Event of Default Occurs.  If an event of default has occurred
and has not been cured,  the trustee or the holders of at least 25% in principal
amount of the debt  securities  of the  affected  series may  declare the entire
principal  amount  of all  the  debt  securities  of that  series  to be due and
immediately  payable.  This is called a declaration of acceleration of maturity.
If an  event  of  default  occurs  because  of  certain  events  in  bankruptcy,
insolvency or reorganization, the principal amount of all the debt securities of
that series will be automatically accelerated, without any action by the trustee
or any holder. At any time after the trustee or the holders have accelerated any
series of debt  securities,  but before a judgment  or decree for payment of the
money due has been  obtained,  the holders of at least a majority  in  principal
amount  of the  debt  securities  of the  affected  series  may,  under  certain
circumstances, rescind and annul such acceleration.

    Except in cases of default,  where the trustee has some special duties,  the
trustee is not required to take any action under the applicable indenture at the
request  of  any  holders  unless  the  holders  offer  the  trustee  reasonable
protection  from  expenses  and  liability.  This is known as an  indemnity.  If
reasonable indemnity is provided,  the holders of a majority in principal amount
of the outstanding securities of the relevant series may direct the time, method
and place of  conducting  any lawsuit or other formal  legal action  seeking any
remedy  available to the  trustee.  These  majority  holders may also direct the
trustee in performing any other action under the applicable  indenture,  subject
to certain limitations.

    Before you bypass the  trustee  and bring your own  lawsuit or other  formal
legal  action  or take  other  steps to  enforce  your  rights or  protect  your
interests relating to the debt securities, the following must occur:

o   You must  give the  trustee  written  notice  that an event of  default  has
    occurred and remains uncured.

o   The  holders  of at  least  25%  in  principal  amount  of  all  outstanding
    securities  of the  relevant  series  must make a written  request  that the
    trustee  take  action  because of the  default,  and must  offer

                                      -9-
<PAGE>
    reasonable  indemnity to the trustee against the cost and other  liabilities
    of taking that action.

o   The  trustee  must have not taken  action for 60 days  after  receipt of the
    above notice and offer of indemnity.

    However,  you are entitled at any time to bring a lawsuit for the payment of
money due on your security after its due date.

    We will furnish to the trustee every year a written  statement of certain of
our officers  certifying  that to their  knowledge we are in compliance with the
applicable indenture and the debt securities, or else specifying any default.

Modification of an Indenture

    There are three types of changes we can make to the  indentures and the debt
securities:

    Changes Requiring Your Approval.  First, there are changes we cannot make to
your debt  securities  without your  specific  approval.  Following is a list of
those types of changes:

o   change the stated maturity of the principal or interest on a debt security,

o   reduce any amounts due on a debt security,

o   reduce the amount of principal  payable upon acceleration of the maturity of
    a debt security following a default,

o   change the place or currency of payment on a debt security,

o   impair your right to sue for payment,

o   modify the subordination  provisions, if any, in a manner that is adverse to
    you,

o   reduce the percentage of holders of debt securities  whose consent is needed
    to modify or amend an indenture,

o   reduce the percentage of holders of debt securities  whose consent is needed
    to waive  compliance  with  certain  provisions  of an indenture or to waive
    certain defaults, and

o   modify any other  aspect of the  provisions  dealing with  modification  and
    waiver of an indenture.

    Changes Requiring a Majority Vote. The second type of change to an indenture
and the debt  securities is the kind that requires a vote in favor by holders of
debt  securities  owning a majority of the  principal  amount of the  particular
series  affected.  Most changes fall into this  category,  except for clarifying
changes and certain other changes that would not adversely affect holders of the
debt securities.  We require the same vote to obtain a waiver of a past default.
However,  we cannot obtain a waiver of a payment  default or any other aspect of
an indenture or the debt securities listed in the first category described under
"--Changes  Requiring Your Approval" unless we obtain your individual consent to
the waiver.

    Changes Not  Requiring  Approval.  The third type of change does not require
any vote by holders of debt securities.  This type is limited to  clarifications
and certain other changes that would not  adversely  affect  holders of the debt
securities.

    Further  Details  Concerning  Voting.  When  taking a vote,  we will use the
following  rules to decide  how much  principal  amount to  attribute  to a debt
security:

o   For original issue  discount  securities,  we will use the principal  amount
    that would be due and payable on the voting date if the maturity of the debt
    securities were accelerated to that date because of a default.

o   For debt  securities  whose  principal  amount is not  known,  we will use a
    special  rule for  that  security  described  in the  applicable  prospectus
    supplement. An example is if the principal amount is based on an index.

o   For  debt  securities  denominated  in one or  more  foreign  currencies  or
    currency units, we will use the U.S. dollar equivalent.

    Debt securities are not considered  outstanding,  and therefore not eligible
to vote,  if we have  deposited  or set  aside in trust  for you money for their
payment  or  redemption  or if we or  one  of  our  affiliates  own  them.  Debt
securities  are also not  eligible  to vote if they have been fully  defeased as
described   immediately  below  under  "--Discharge,   Defeasance  and  Covenant
Defeasance--Full Defeasance."

    We are generally entitled to set any day as a record date for the purpose of
determining the holders of outstanding securities entitled to vote or

                                      -10-
<PAGE>
take other action under an indenture.  If we set a record date, only persons who
are holders of  outstanding  securities of the  applicable  series on the record
date may vote or take the action.  Moreover, the applicable holders must vote or
take the action within 180 days following the record date or another period that
we may specify. We may shorten or lengthen this period from time to time.

Discharge, Defeasance and Covenant Defeasance

    Discharge.  We may discharge  some  obligations  to holders of any series of
debt  securities  that either have become due and payable or will become due and
payable  within one year,  or  scheduled  for  redemption  within  one year,  by
irrevocably  depositing  with the  trustee,  in trust,  funds in the  applicable
currency  in an amount  sufficient  to pay the debt  securities,  including  any
premium and interest.

    Full  Defeasance.  We can,  under  particular  circumstances,  effect a full
defeasance  of your  series of debt  securities.  By this we mean we can legally
release  ourselves from any payment or other  obligations on the debt securities
if we put in place the following arrangements to repay you:

o   We must  deposit  in trust for your  benefit  and the  benefit  of all other
    direct  holders  of the debt  securities  a  combination  of money  and U.S.
    government  or U.S.  government  agency  notes or bonds  that will  generate
    enough cash to make  interest,  principal and any other payments on the debt
    securities on their various due dates.

o   The current  federal tax law must be changed or an IRS ruling must be issued
    permitting  the above  deposit  without  causing you to be taxed on the debt
    securities  any  differently  than if we did not make the  deposit  and just
    repaid the debt  securities  ourselves.  Under current  federal tax law, the
    deposit and our legal release from the debt  securities  would be treated as
    though we took back your debt securities and gave you your share of the cash
    and notes or bonds  deposited in trust.  In that event,  you could recognize
    gain or loss on the debt securities you give back to us.

o   We must deliver to the trustee a legal opinion confirming the tax law change
    described above.

    If we did accomplish full  defeasance,  you would have to rely solely on the
trust deposit for repayment on the debt securities. You could not look to us for
repayment in the unlikely event of any shortfall.  Conversely, the trust deposit
would most likely be protected from claims of our lenders and other creditors if
we ever  become  bankrupt  or  insolvent.  You would also be  released  from any
subordination provisions.

    Covenant  Defeasance.  Under  current  federal tax law, we can make the same
type of deposit  described  above and be released  from some of the  restrictive
covenants in the debt securities.  This is called "covenant defeasance." In that
event,  you would lose the protection of those  restrictive  covenants but would
gain the  protection of having money and  securities set aside in trust to repay
the securities and you would be released from any subordination  provisions.  In
order to achieve covenant defeasance, we must do the following:

o   We must  deposit  in trust for your  benefit  and the  benefit  of all other
    direct  holders  of the debt  securities  a  combination  of money  and U.S.
    government  or U.S.  government  agency  notes or bonds  that will  generate
    enough cash to make  interest,  principal and any other payments on the debt
    securities on their various due dates.

o   We must deliver to the trustee a legal opinion confirming that under current
    federal income tax law we may make the above deposit  without causing you to
    be taxed on the debt securities any differently  than if we did not make the
    deposit and just repaid the debt securities ourselves.

    If  we  accomplish  covenant  defeasance,  the  following  provisions  of an
indenture and the debt securities would no longer apply:

o   Any covenants  applicable to the series of debt  securities and described in
    the applicable prospectus supplement.

o   Any subordination provisions.

o   Certain events of default  relating to breach of covenants and  acceleration
    of the maturity of other debt set forth in any prospectus supplement.

    If we accomplish covenant defeasance, you can still look to us for repayment
of the debt securities if there were a shortfall in the trust deposit. If one of
the remaining  events of default occurs,  for example,  our bankruptcy,  and the
debt securities  become  immediately due and payable,  there may be a shortfall.
Depending  on the  event  causing  the  default,  you may not be able to  obtain
payment of the shortfall.

                                      -11-
<PAGE>
Subordination

    We will set  forth in the  applicable  prospectus  supplement  the terms and
conditions,  if any, upon which any series of senior subordinated  securities or
subordinated  securities is subordinated to debt securities of another series or
to other indebtedness of ours. The terms will include a description of:

o   the indebtedness ranking senior to the debt securities being offered,

o   the  restrictions  on payments to the holders of the debt  securities  being
    offered  while  a  default  with  respect  to  the  senior  indebtedness  is
    continuing,

o   the restrictions,  if any, on payments to the holders of the debt securities
    being offered following an event of default, and

o   provisions  requiring  holders of the debt securities being offered to remit
    some payments to holders of senior indebtedness.

Global Securities

    If so set forth in the applicable  prospectus  supplement,  we may issue the
debt  securities  of a  series  in  whole  or in part in the form of one or more
global  securities  that will be deposited  with a depositary  identified in the
prospectus  supplement.  We may issue global  securities in either registered or
bearer form and in either temporary or permanent form. The specific terms of the
depositary  arrangement  with respect to any series of debt  securities  will be
described in the prospectus supplement.

                          DESCRIPTION OF CAPITAL STOCK

    The  description  below  summarizes the more important  terms of our capital
stock.  Because this section is a summary,  it does not describe every aspect of
the capital  stock.  This summary is subject to and qualified in its entirety by
reference to the  provisions of our Restated  Certificate of  Incorporation,  as
amended, including by any applicable Certificates of Designation. We refer to it
as the restated  certificate.  We have  incorporated  by reference a copy of the
restated  certificate as an exhibit to the registration  statement of which this
prospectus  is a part.  This summary is subject to and qualified by reference to
the  description  of the  particular  terms of your  series of  preferred  stock
described in the applicable prospectus supplement.

General

    Our  authorized  capital stock  consists of  20,000,000  shares of preferred
stock,  $.01 par value per share,  500,000,000  shares of Class A common  stock,
$.01 par value per share,  50,000,000  shares of Class B common stock,  $.01 par
value per share, and 10,000,000  shares of Class C common stock,  $.01 par value
per share.

Preferred Stock

    General.   Our  board  of  directors   will   determine  the   designations,
preferences,  limitations and relative  rights of the 20,000,000  authorized and
unissued shares of preferred stock, including:

o   the  distinctive  designation  of each  series and the number of shares that
    will constitute the series,

o   the voting rights, if any, of shares of the series,

o   the dividend rate on the shares of the series,  any restriction,  limitation
    or condition  upon the payment of the dividends,  whether  dividends will be
    cumulative, and the dates on which dividends are payable,

o   the prices at which,  and the terms and  conditions on which,  the shares of
    the series may be redeemed, if the shares are redeemable,

o   the  purchase  or sinking  fund  provisions,  if any,  for the  purchase  or
    redemption of shares of the series,

o   any  preferential  amount  payable  upon  shares  of  the  series  upon  our
    liquidation or the distribution of our assets,

o   if the shares are  convertible,  the price or rates of  conversion at which,
    and the terms and  conditions  on which,  the  shares of the  series  may be
    converted into other securities, and

o   whether the series can be exchanged,  at our option,  into debt  securities,
    and the terms and conditions of any permitted exchange.

    The  issuance  of  preferred  stock,  or the  issuance of rights to purchase
preferred  stock,  could  discourage an  unsolicited  acquisition  proposal.  In
addition,  the rights of holders of common  stock will be subject to, and may be
adversely  affected by, the rights of

                                      -12-
<PAGE>
holders of any preferred stock that we may issue in the future.

    The following  description  of the  preferred  stock sets forth some general
terms and provisions of the preferred stock to which a prospectus supplement may
relate.  The statements below describing the preferred stock are in all respects
subject to and  qualified  in their  entirety  by  reference  to the  applicable
provisions of our restated certificate, including any applicable certificates of
designation, and our by-laws.

    The  prospectus  supplement  will  describe  the  specific  terms as to each
issuance of preferred stock, including:

o   the number of shares of the preferred stock offered,

o   the offering price of the preferred stock,

o   the dividend rate, when dividends will be paid, or the method of determining
    the dividend rate if it is based on a formula or not otherwise fixed,

o   the date from which dividends on the preferred stock shall accumulate,

o   the provisions for any auctioning or  remarketing,  if any, of the preferred
    stock,

o   the provision, if any, for redemption or a sinking fund,

o   the liquidation preference per share,

o   any listing of the preferred stock on a securities exchange,

o   whether the  preferred  stock will be  convertible  and, if so, the security
    into which it is  convertible  and the terms and  conditions of  conversion,
    including the conversion price or the manner of determining it,

o   whether  interests in the preferred  stock will be represented by depositary
    shares as more  fully  described  below  under  "Description  of  Depositary
    Shares,"

o   a discussion of federal income tax considerations,

o   the relative  ranking and  preferences of the preferred stock as to dividend
    and liquidation rights,

o   any limitations on issuance of any preferred stock ranking senior to or on a
    parity with the series of preferred  stock being  offered as to dividend and
    liquidation rights,

o   any  limitations  on direct or  beneficial  ownership  and  restrictions  on
    transfer, and

o   any other specific terms, preferences,  rights,  limitations or restrictions
    of the preferred stock.

    As  described  under  "Description  of  Depositary  Shares,"  we may, at our
option, elect to offer depositary shares evidenced by depositary receipts. If we
elect to do this, each depositary  receipt will represent a fractional  interest
in a share of the particular  series of the preferred stock issued and deposited
with a  depositary.  The  applicable  prospectus  supplement  will  specify that
fractional interest.

    Rank. Unless our board of directors  otherwise  determines and we so specify
in the  applicable  prospectus  supplement,  we expect that the preferred  stock
will, with respect to dividend rights and rights upon  liquidation,  rank senior
to all common stock.

    Dividends.  Holders of  preferred  stock of each  series will be entitled to
receive cash and/or  stock  dividends at the rates and on the dates shown in the
applicable prospectus supplement.  Even though the preferred stock may specify a
fixed dividend, our board of directors must declare those dividends and they may
be paid only out of assets of legally available for payment.  Each dividend will
be payable to holders of record as they  appear on our stock  transfer  books on
the record dates fixed by our board of directors. In the case of preferred stock
represented by depositary  receipts,  the records of the depositary  referred to
under  "Description  of  Depositary  Shares" will  determine the persons to whom
dividends are payable.

    Dividends  on any series of preferred  stock (we refer to that  series,  for
ease  of  reference,   as  the   "Applicable   Series")  may  be  cumulative  or
noncumulative,  as provided in the applicable prospectus supplement.  Cumulative
dividends  will be  cumulative  from and after the date shown in the  applicable
prospectus supplement.  If our board of directors fails to declare a dividend on
any Applicable Series that is  noncumulative,  the holders

                                      -13-
<PAGE>
will have no right to receive, and we will have no obligation to pay, a dividend
in respect of the applicable  dividend period,  whether or not dividends on that
series are declared payable in the future.

    If the Applicable  Series is entitled to a cumulative  dividend,  we may not
declare, or pay or set aside for payment, any full dividends on any other series
of preferred stock ranking,  as to dividends,  on a parity with or junior to the
Applicable Series,  unless we declare,  and either pay or set aside for payment,
full cumulative dividends on the Applicable Series for all past dividend periods
and the then current dividend period.  If the Applicable  Series does not have a
cumulative  dividend,  we must declare,  and pay or set aside for payment,  full
dividends  for the then current  dividend  period only.  When  dividends are not
paid,  or set aside for  payment,  in full upon any  Applicable  Series  and the
shares  of any  other  series  ranking  on a  parity  as to  dividends  with the
Applicable  Series,  we must  declare,  and pay or set  aside for  payment,  all
dividends   upon  the   Applicable   Series   and  any   other   parity   series
proportionately,  in accordance with accrued and unpaid dividends of the several
series.  For these purposes,  accrued and unpaid dividends do not include unpaid
dividend periods on  noncumulative  preferred stock. No interest will be payable
in respect of any dividend payment that may be in arrears.

    Except  as  provided  in the  immediately  preceding  paragraph,  unless  we
declare, and pay or set aside for payment, full cumulative dividends,  including
for the then current period,  on any cumulative  Applicable  Series,  we may not
declare,  or pay or set aside for payment,  any dividends or other distributions
upon common stock or any other capital  stock  ranking  junior to or on a parity
with the Applicable  Series as to dividends or upon  liquidation.  The foregoing
restriction  does not apply to dividends or other  distributions  paid in common
stock or other  capital  stock  ranking  junior to the  Applicable  Series as to
dividends and upon liquidation.  If the Applicable  Series is noncumulative,  we
need only declare,  and pay or set aside for payment,  the dividend for the then
current period,  before declaring  dividends or distributions on common stock or
junior or parity securities.  In addition, under the circumstances that we could
not declare a dividend, we may not redeem, purchase or otherwise acquire for any
consideration  any common stock or other parity or junior capital stock,  except
upon conversion into or exchange for common stock or other junior capital stock.
We may, however, make purchases and redemptions otherwise prohibited pursuant to
certain redemptions or pro rata offers to purchase the outstanding shares of the
Applicable Series and any other parity series of preferred stock.

    We will credit any  dividend  payment  made on an  Applicable  Series  first
against the earliest accrued but unpaid dividend due with respect to the series.

    Redemption.  We may have the right  and/or  may be  required  to redeem  the
preferred stock, as a whole or in part, in each case upon the terms, if any, and
at the times and at the  redemption  prices shown in the  applicable  prospectus
supplement.

    Liquidation  Preference.  The applicable prospectus supplement will show the
liquidation   preference  of  the  Applicable  Series.  Upon  any  voluntary  or
involuntary  liquidation,  before any distribution may be made to the holders of
common stock or any other capital stock ranking  junior in the  distribution  of
assets  upon any  liquidation  to the  Applicable  Series,  the  holders  of the
Applicable  Series will be entitled  to receive,  out of assets of ours  legally
available for  distribution to  stockholders,  liquidating  distributions in the
amount of the  liquidation  preference,  plus an amount  equal to all  dividends
accrued and unpaid. In the case of a noncumulative  Applicable  Series,  accrued
and unpaid  dividends  include  only the then  current  dividend  period.  After
payment of the full amount of the  liquidating  distributions  to which they are
entitled,  the holders of preferred  stock will have no right or claim to any of
our remaining assets. If liquidating  distributions shall have been made in full
to all holders of preferred  stock,  our  remaining  assets will be  distributed
among the holders of any other  capital  stock  ranking  junior to the preferred
stock upon  liquidation,  according to their rights and  preferences and in each
case according to their number of shares.

    If, upon any voluntary or involuntary liquidation,  our available assets are
insufficient  to  pay  the  amount  of  the  liquidating  distributions  on  all
outstanding shares of an Applicable Series and the corresponding amounts payable
on all shares of other capital stock ranking on a parity in the  distribution of
assets with the Applicable Series, then the holders of the Applicable Series and
all other equally ranking capital stock shall share ratably in the  distribution
in  proportion  to the  full  liquidating  distributions  to  which  they  would
otherwise be entitled.

    For these  purposes,  our  consolidation  or  merger  with or into any other
corporation  or  other  entity,  or the  sale,  lease  or  conveyance  of all or
substantially all of our property or business,  will not be deemed to constitute
our liquidation.

                                      -14-
<PAGE>
    Voting  Rights.  Holders  of the  preferred  stock  will not have any voting
rights,  except as shown below or as otherwise from time to time required by law
or as indicated in the applicable prospectus supplement.

    Conversion Rights. We will show in the applicable  prospectus supplement the
terms and  conditions,  if any,  upon which you may,  or we may  require you to,
convert  shares of any series of preferred  stock into common stock or any other
class or series of capital  stock  will be shown.  The terms  will  include  the
number of shares of common stock or other  securities  into which the shares are
convertible,  the  conversion  price,  or the  manner  of  determining  it,  the
conversion period,  provisions as to whether conversion will be at the option of
the holders of the series or at our option,  the events  requiring an adjustment
of the conversion price, and provisions affecting conversion upon the redemption
of shares of the series.

    Our Exchange Rights.  We will show in the applicable  prospectus  supplement
the terms and  conditions,  if any,  upon which we can  require  you to exchange
shares of any series of preferred  stock for junior  subordinated  debt or other
debt  securities.   If  an  exchange  is  required,   you  will  receive  junior
subordinated  debt or other debt securities with a principal amount equal to the
liquidation  preference of the applicable  series of preferred  stock. The other
terms will include the terms and provisions of the junior  subordinated  debt or
other debt  securities  which will not be materially  less favorable to you than
those of the series of preferred stock being exchanged.

Common Stock

    Dividends.  Holders of record of shares of common  stock on the record  date
fixed by our board of directors are entitled to receive dividends as declared by
our board of directors  out of funds  legally  available  for that  purpose.  No
dividends  may be declared or paid in cash or property on any share of any class
of common stock, however, unless simultaneously the same dividend is declared or
paid on each share of the other classes of common  stock.  Dividends in the form
of  shares  of  stock  of  any  company,  including  our  company  or any of our
subsidiaries,  are excepted from that requirement.  In that case, the shares may
differ as to voting rights to the extent that voting rights now differ among the
different classes of common stock. In the case of any dividend payable in shares
of common  stock,  holders of each class of common stock are entitled to receive
the same percentage dividend, payable in shares of that class, as the holders of
each other class.  Dividends  and other  distributions  on common stock are also
subject to the rights of  holders of any series of  preferred  stock that may be
outstanding from time to time and under our credit  facilities.  See "--Dividend
Restrictions" below.

    Voting  Rights.  Except as otherwise  required by law and in the election of
directors, and subject to the rights of holders of any series of preferred stock
that may be outstanding  from time to time,  holders of shares of Class A common
stock and Class B common stock have the exclusive voting rights and will vote as
a single  class on all matters  submitted  to a vote of the  stockholders.  Each
share of Class A common  stock is entitled to one vote and each share of Class B
common stock is entitled to ten votes.  The holders of the Class A common stock,
voting as a separate class,  have the right to elect two independent  directors.
The Class C common stock is nonvoting,  except as otherwise required by Delaware
corporate law.

    Delaware  corporate  law requires the  affirmative  vote of the holders of a
majority  of the  outstanding  shares of any class or series of common  stock to
approve,  among other  things,  a change in the  designations,  preferences  and
limitations  of the shares of that class or series.  The  restated  certificate,
however,  requires the affirmative  vote of the holders of not less than 66 2/3%
of the Class A common stock and Class B common stock,  voting as a single class,
to amend most of the  provisions of the restated  certificate,  including  those
relating  to  the   provisions   of  the  various   classes  of  common   stock,
indemnification of directors,  exoneration of directors for certain acts and the
super-majority provision.

    The restated certificate:

o   limits the  aggregate  voting  power of Steven B.  Dodge and his  controlled
    entities to 49.99% of the  aggregate  voting  power of all shares of capital
    stock  entitled to vote  generally for the election of  directors,  less the
    voting power  represented  by the shares of Class B common stock acquired by
    Thomas H.  Stoner,  a  director,  and  purchasers  affiliated  with him in a
    January 1998 private offering and owned by them or certain affiliates,

o   prohibits future issuances of Class B common stock,  except upon exercise of
    then outstanding options and pursuant to stock dividends or stock splits,

                                      -15-
<PAGE>
o   limits transfers of Class B common stock to permitted transferees,

o   provides  for  automatic  conversion  of the Class B common stock to Class A
    common stock if the  aggregate  voting power of Mr.  Dodge,  Mr.  Stoner and
    their respective controlled entities falls below 21.3%, and

o   requires  the  holders  of a  majority  of Class A common  stock to  approve
    amendments adversely affecting the Class A common stock.

    Conversion  Provisions.  Shares  of Class B common  stock and Class C common
stock are convertible,  at any time at the option of the holder,  on a share for
share basis into shares of Class A common  stock.  The present  owner of Class C
common  stock can convert  that stock only upon the  occurrence  of a conversion
event or with the  consent of our board of  directors.  Shares of Class B common
stock  automatically  convert into shares of Class A common stock upon any sale,
transfer,   assignment  or  other   disposition  other  than  (a)  to  permitted
transferees, or (b) pursuant to pledges but not to the pledgee upon foreclosure.
Permitted  transferees include certain family members and other holders of Class
B common stock.

    Liquidation  Rights.  Upon our  liquidation,  dissolution or winding up, the
holders  of each  class of common  stock are  entitled  to share  ratably in all
assets available for distribution after payment in full of creditors and payment
in full to any holders of the  preferred  stock then  outstanding  of any amount
required to be paid to them.

    Other Provisions. The holders of common stock are not entitled to preemptive
or subscription  rights.  The shares of common stock  presently  outstanding are
validly issued, fully paid and nonassessable.

    In any merger,  consolidation or business  combination,  the holders of each
class of common stock must receive the identical  consideration to that received
by holders of each other class of common  stock.  However,  if shares of capital
stock or other securities of any other company are distributed,  they may differ
as to voting  rights to the same extent that voting rights then differ among the
different classes of our common stock.

    No class of common stock may be subdivided,  consolidated,  reclassified  or
otherwise  changed unless,  concurrently,  the other classes of common stock are
subdivided,  consolidated,   reclassified  or  otherwise  changed  in  the  same
proportion and in the same manner.

    Dividend   Restrictions.   Our  credit  facilities   prohibit  our  borrower
subsidiaries from paying cash dividends or distributions,  or from purchasing or
otherwise  acquiring  their  capital stock or other equity  interests.  However,
beginning on April 15, 2004, if no default  exists or would be created under the
credit  facilities,  our borrower  subsidiaries  may pay cash  dividends or make
other distributions of up to 50% of excess cash flow, for the preceding calendar
year.

    Delaware  Business  Combination  Provisions.  Under Delaware  corporate law,
certain  business  combinations,  including  the issuance of equity  securities,
between a Delaware corporation and any "interested stockholder" must be approved
by the  holders  of at  least  66 2/3% of the  voting  stock  not  owned  by the
interested  stockholder  if it occurs  within three years of the date the person
became an  interested  stockholders.  The  voting  requirement  does not  apply,
however,  if,  before the  acquisition,  the  corporation's  board of  directors
approved either the business  combination or the  transaction  which resulted in
the person becoming an interested  stockholder.  "Interested  stockholder" means
any person who owns,  directly or indirectly,  15.0% or more of the voting power
of the  corporation's  shares of capital stock.  The provision does not apply to
Mr. Dodge because our board of directors  approved the  transaction  pursuant to
which he became an interested stockholder.

    Listing of Class A Common  Stock.  Our Class A common stock is traded on the
NYSE under the symbol "AMT."

    Transfer  Agent and  Registrar.  The transfer  agent and  registrar  for our
common stock is Harris Trust and Savings Bank, 311 West Monroe Street,  Chicago,
Illinois 60606. Its telephone number is (312) 461-4600.

                        DESCRIPTION OF DEPOSITARY SHARES

    General.  The  description  shown  below  and in any  applicable  prospectus
supplement of certain  provisions of any deposit agreement and of the depositary
shares and depositary receipts  representing  depositary shares does not purport
to be complete  and is subject to and  qualified in its entirety by reference to
the  forms  of  deposit  agreement  and  depositary  receipts  relating  to each
applicable  series of preferred stock. The deposit  agreement and the depositary
receipts  contain the full legal text of the matters

                                      -16-
<PAGE>
described in this section.  We will file a copy of those  documents with the SEC
at or before the time of the  offering  of the  applicable  series of  preferred
stock.  This  summary  also is  subject to and  qualified  by  reference  to the
description  of the  particular  terms  of  your  series  of  depositary  shares
described in the applicable prospectus supplement.

    We may,  at our option,  elect to offer  fractional  interests  in shares of
preferred  stock,  rather than shares of preferred  stock.  If we exercise  this
option, we will appoint a depositary to issue depositary  receipts  representing
those  fractional  interests.  Preferred  stock of each  series  represented  by
depositary  shares will be deposited under a separate deposit  agreement between
us and the  depositary.  The  prospectus  supplement  relating  to a  series  of
depositary  shares will show the name and address of the depositary.  Subject to
the terms of the applicable deposit  agreement,  each owner of depositary shares
will  be  entitled  to all  of the  dividend,  voting,  conversion,  redemption,
liquidation and other rights and preferences of the preferred stock  represented
by those depositary shares.

    The  depositary  shares will be  evidenced  by  depositary  receipts  issued
pursuant to the  applicable  deposit  agreement.  Upon  surrender of  depositary
receipts  at the  office of the  depositary,  and upon  payment  of the  charges
provided  in and  subject  to the terms of the  deposit  agreement,  a holder of
depositary  shares  is  entitled  to  receive  the  shares  of  preferred  stock
underlying the surrendered depositary receipts.

    Dividends  and  Other  Distributions.  A  depositary  will  be  required  to
distribute all cash dividends or other cash distributions received in respect of
the  applicable  preferred  stock to the record  holders of depositary  receipts
evidencing  the  related  depositary  shares  in  proportion  to the  number  of
depositary receipts owned by the holders.  Fractions will be rounded down to the
nearest whole cent.

    If the  distribution is other than in cash, a depositary will be required to
distribute  property received by it to the record holders of depositary receipts
entitled  thereto,  unless the depositary  determines that it is not feasible to
make the distribution. In that case, the depositary may, with our approval, sell
the property and distribute the net proceeds from the sale to the holders.

    No  distributions  will be  made on any  depositary  shares  that  represent
preferred stock converted or exchanged.  The deposit agreement will also contain
provisions  relating to the manner in which any  subscription  or similar rights
offered by us to  holders  of the  preferred  stock  will be made  available  to
holders of depositary  shares.  All  distributions are subject to obligations of
holders to file proofs,  certificates  and other  information and to pay certain
charges and expenses to the depositary.

    Withdrawal Of Preferred Stock. You may receive the number of whole shares of
your series of preferred  stock and any money or other  property  represented by
those  depositary  receipts after  surrendering  the depositary  receipts at the
corporate trust office of the depositary. Partial shares of preferred stock will
not be issued. If the depositary shares which you surrender exceed the number of
depositary  shares that represent the number of whole shares of preferred  stock
you wish to withdraw, then the depositary will deliver to you at the same time a
new depositary receipt  evidencing the excess number of depositary shares.  Once
you have withdrawn your preferred  stock, you will not be entitled to re-deposit
that preferred stock under the deposit agreement in order to receive  depositary
shares.  We do not  expect  that there  will be any  public  trading  market for
withdrawn shares of preferred stock.

    Redemption  of  Depositary  Shares.  If we redeem a series of the  preferred
stock underlying the depositary  shares,  the depositary shares will be redeemed
from the proceeds received by the depositary  resulting from the redemption,  in
whole or in part, of the series held by the depositary. The depositary will mail
notice of redemption  not less than 30 and not more than 60 days before the date
fixed for redemption to the record holders of the depositary receipts evidencing
the  depositary  shares we are  redeeming  at their  addresses  appearing in the
depositary's  books.  The redemption price per depositary share will be equal to
the applicable  fraction of the redemption  price per share payable with respect
to the series of the  preferred  stock.  Whenever we redeem  shares of preferred
stock  held  by the  depositary,  the  depositary  will  redeem  as of the  same
redemption date the number of depositary  shares relating to shares of preferred
stock so redeemed.  If we are redeeming less than all of the depositary  shares,
the depositary will select the depositary  shares we are redeeming by lot or pro
rata as the depositary may determine.

    After the date  fixed for  redemption,  the  depositary  shares  called  for
redemption  will no longer be deemed  outstanding.  All rights of the holders of
the  depositary  shares and the related  depositary  receipts will cease at that
time,  except  the right to  receive  the money or other  property  to which the
holders of

                                      -17-
<PAGE>
depositary  shares were entitled upon redemption.  Receipt of the money or other
property is subject to surrender to the  depositary of the  depositary  receipts
evidencing the redeemed depositary shares.

    Voting of the  Preferred  Stock.  Upon  receipt of notice of any  meeting at
which the holders of the  applicable  preferred  stock are  entitled to vote,  a
depositary will be required to mail the  information  contained in the notice of
meeting to the record holders of the applicable depositary receipts. Each record
holder of depositary receipts on the record date, which will be the same date as
the record date for the  preferred  stock,  will be  entitled  to  instruct  the
depositary as to the exercise of the voting  rights  pertaining to the amount of
preferred stock represented by the holder's  depositary  shares.  The depositary
will try, as  practical,  to vote the shares as you  instruct.  We will agree to
take all  reasonable  action that the  depositary  deems  necessary  in order to
enable  it to do so.  If you do not  instruct  the  depositary  how to vote your
shares, the depositary will abstain from voting those shares.

    Liquidation   Preference.   Upon  our  liquidation,   whether  voluntary  or
involuntary,  the  holders  of each  depositary  share will be  entitled  to the
fraction of the  liquidation  preference  accorded each share of preferred stock
represented  by the  depositary  share,  as shown in the  applicable  prospectus
supplement.

    Conversion or Exchange of Preferred  Stock.  The depositary  shares will not
themselves be convertible into or exchangeable for common stock, preferred stock
or any of our other securities or property. Nevertheless, if so specified in the
applicable prospectus supplement,  the depositary receipts may be surrendered by
holders to the applicable depositary with written instructions to it to instruct
us to cause  conversion of the preferred  stock  represented  by the  depositary
shares.  Similarly, if so specified in the applicable prospectus supplement,  we
may require you to surrender all of your  depositary  receipts to the applicable
depositary upon our requiring the exchange of the preferred stock represented by
the depositary shares into our debt securities. We will agree that, upon receipt
of the  instruction and any amounts payable in connection with the conversion or
exchange,  we will cause the conversion or exchange using the same procedures as
those  provided  for  delivery of preferred  stock to effect the  conversion  or
exchange.  If you are  converting  only a part  of the  depositary  shares,  the
depositary  will  issue  you  a  new  depositary  receipt  for  any  unconverted
depositary shares.

    Taxation.  As owner of  depositary  shares,  you  will be  treated  for U.S.
federal  income tax  purposes as if you were an owner of the series of preferred
stock represented by the depositary shares.  Therefore,  you will be required to
take into account for U.S.  federal income tax purposes income and deductions to
which you would be  entitled  if you were a holder of the  underlying  series of
preferred stock. In addition:

o   no gain or loss will be recognized for U.S. federal income tax purposes upon
    the  withdrawal  of  preferred  stock in exchange for  depositary  shares as
    provided in the deposit agreement,

o   the tax basis of each share of preferred stock to you as exchanging owner of
    depositary  shares will,  upon  exchange,  be the same as the  aggregate tax
    basis of the depositary shares exchanged for the preferred stock, and

o   if you held the  depositary  shares  as a  capital  asset at the time of the
    exchange for preferred stock, the holding period for shares of the preferred
    stock will include the period during which you owned the depositary shares.

    Amendment and  Termination  of a Deposit  Agreement.  We and the  applicable
depositary are permitted to amend the provisions of the depositary  receipts and
the  deposit  agreement.  However,  the  holders of at least a  majority  of the
applicable  depositary  shares then  outstanding must approve any amendment that
adds or increases  fees or charges or prejudices an important  right of holders.
Every  holder of an  outstanding  depositary  receipt at the time any  amendment
becomes  effective,  by  continuing  to hold the  receipt,  will be bound by the
applicable deposit agreement as amended.

    Any deposit  agreement  may be  terminated by us upon not less than 30 days'
prior written notice to the  applicable  depositary if a majority of each series
of preferred stock affected by the termination consents to the termination. When
that occurs,  the  depositary  will be required to deliver or make  available to
each holder of depositary  receipts,  upon surrender of the depositary  receipts
held by the holder,  the number of whole or fractional shares of preferred stock
as are  represented  by  the  depositary  shares  evidenced  by  the  depositary
receipts,  together with any other property held by the depositary  with respect
to the depositary receipts.  In addition, a deposit agreement will automatically
terminate if:

                                      -18-
<PAGE>
o   all depositary shares outstanding it shall have been redeemed,

o   there  shall  have  been a final  distribution  in  respect  of the  related
    preferred  stock in connection  with our  liquidation  and the  distribution
    shall have been made to the holders of depositary  receipts  evidencing  the
    depositary shares underlying the preferred stock, or

o   each of the shares of related  preferred  stock shall have been converted or
    exchanged into securities not represented by depositary shares.

    Charges  of a  Depositary.  We will pay all  transfer  and  other  taxes and
governmental  charges arising solely from the existence of a deposit  agreement.
In addition,  we will pay the fees and expenses of a  depositary  in  connection
with the initial  deposit of the preferred stock and any redemption of preferred
stock.  However,  holders of depositary  receipts will pay any transfer or other
governmental  charges and the fees and expenses of a  depositary  for any duties
the holders request to be performed that are outside of those expressly provided
for in the applicable deposit agreement.

    Resignation  and Removal of Depositary.  A depositary may resign at any time
by delivering to us notice of its election to do so. In addition,  we may at any
time remove a depositary.  Any  resignation  or removal will take effect when we
appoint a successor depositary and it accepts the appointment. We must appoint a
successor  depositary within 60 days after delivery of the notice of resignation
or removal.  A depositary  must be a bank or trust company  having its principal
office in the United States that has a combined  capital and surplus of at least
$50 million.

    Miscellaneous.  A  depositary  will be  required  to  forward  to holders of
depositary  receipts any reports and communications from us that are received by
it with respect to the related preferred stock.

    Neither  a  depositary  nor we will be  liable  if it is  prevented  from or
delayed in performing its  obligations  under a deposit  agreement by law or any
circumstances  beyond its control.  Our  obligations and those of the depositary
under a deposit  agreement  will be limited to  performing  their duties in good
faith and without  gross  negligence or willful  misconduct.  Neither we nor any
depositary  will be obligated to  prosecute  or defend any legal  proceeding  in
respect of any depositary receipts, depositary shares or related preferred stock
unless  satisfactory  indemnity is  furnished.  We and each  depositary  will be
permitted to rely on written  advice of counsel or  accountants,  on information
provided  by  persons  presenting  preferred  stock for  deposit,  by holders of
depositary receipts,  or by other persons believed in good faith to be competent
to give the information,  and on documents  believed in good faith to be genuine
and signed by a proper party.

    If a depositary receives  conflicting claims,  requests or instructions from
any holders of depositary receipts,  on the one hand, and us, on the other hand,
the depositary shall be entitled to act on the claims,  requests or instructions
received from us.

                             DESCRIPTION OF WARRANTS

    We  may  issue,   together  with  any  other  securities  being  offered  or
separately,  warrants entitling the holder to purchase from or sell to us, or to
receive  from  us the  cash  value  of the  right  to  purchase  or  sell,  debt
securities, preferred stock, depositary shares or common stock. We and a warrant
agent will enter a warrant  agreements  pursuant to which the  warrants  will be
issued.  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. We will file a copy of
the warrants and the warrant agreement with the SEC at or before the time of the
offering of the applicable series of warrants.

    In the case of each series of warrants, the applicable prospectus supplement
will  describe the terms of the warrants  being offered  thereby,  including the
following, if applicable:

o   the offering price,

o   the number of warrants offered,

o   the securities underlying the warrants,

o   the  exercise  price,  the  procedures  for exercise of the warrants and the
    circumstances,  if any,  that will  deem the  warrants  to be  automatically
    exercised,

o   the date on which the warrants will expire,

o   federal income tax consequences,

o   the rights, if any, we have to redeem the warrant,

o   the name of the warrant agent, and

                                      -19-
<PAGE>
o   the other terms of the warrants.

    Warrants may be exercised at the appropriate  office of the warrant agent or
any other office indicated in the applicable prospectus  supplement.  Before the
exercise of warrants,  holders will not have any of the rights of holders of the
securities  purchasable  upon exercise and will not be entitled to payments made
to holders of the securities.

    The warrant agreements may be amended or supplemented without the consent of
the holders of the  warrants to which it applies to effect  changes that are not
inconsistent  with the  provisions  of the  warrants  and that do not  adversely
affect the interests of the holders of the warrants. However, any amendment that
materially  and adversely  alters the rights of the holders of warrants will not
be  effective  unless  the  holders  of at least a  majority  of the  applicable
warrants then outstanding approve the amendment.  Every holder of an outstanding
warrant at the time any amendment becomes  effective,  by continuing to hold the
warrant,  will be bound by the applicable  warrant agreement as amended thereby.
The  prospectus  supplement  applicable  to a particular  series of warrants may
provide that certain  provisions of the warrants,  including the  securities for
which they may be exercisable,  the exercise price,  and the expiration date may
not be altered without the consent of the holder of each warrant.

                              PLAN OF DISTRIBUTION

    We may sell the offered  securities to one or more  underwriters  for public
offering and sale by them. We may also sell the offered  securities to investors
directly or through  agents.  We will name any  underwriter or agent involved in
the  offer  and sale of the  offered  securities  in the  applicable  prospectus
supplement.

    The distribution of offered  securities may be effected from time to time in
one or more  transactions at a fixed price or prices,  which may be changed,  at
market prices  prevailing  at the time of sale, at prices  related to the market
prices,  or at  negotiated  prices.  In  connection  with  the  sale of  offered
securities,  underwriters  or agents may  receive or be deemed to have  received
compensation  from us or from purchasers in the form of underwriting  discounts,
concessions  or  commissions.  Underwriters  may sell offered  securities  to or
through dealers,  and dealers may receive compensation in the form of discounts,
concessions or commissions from the underwriters or from purchasers.

    We will show any  underwriting  compensation  paid by us to  underwriters or
agents in connection with the offering of offered securities, and any discounts,
concessions or commissions allowed by underwriters to participating  dealers, in
the  applicable  prospectus   supplement.   Underwriters,   dealers  and  agents
participating in the distribution of the offered  securities may be deemed to be
underwriters.  Any discounts,  concessions and commissions  received by them and
any profit realized by them on resale of the offered securities may be deemed to
be  underwriting  discounts and  commissions,  under the Securities Act of 1933.
Underwriters,  dealers and agents may be entitled, under agreements entered into
with us, to  indemnification  against  and  contribution  toward  certain  civil
liabilities, including liabilities under the Securities Act.

    If so indicated in the applicable prospectus  supplement,  we will authorize
underwriters  or other persons acting as our agents to solicit offers by certain
institutions to purchase offered securities from us at the public offering price
shown in the applicable  prospectus  supplement  pursuant to contracts providing
for payment  and  delivery  on a future  date or dates.  Institutions  with whom
contracts may be made include commercial and savings banks, insurance companies,
pension funds,  investment companies,  educational and charitable  institutions,
and other  institutions.  We are  required  to  approve  any  contracts  and the
institutions  that may become

                                      -20-
<PAGE>
parties  to them.  Any  contracts  will be  subject  to the  condition  that the
purchase by an  institution  of the offered  securities  will not at the time of
delivery be prohibited under the law of any jurisdiction in the United States to
which the  institution  is subject.  If a portion of the offered  securities  is
being sold to  underwriters,  the contract may also be subject to the  condition
that we will have sold to the underwriters  the offered  securities not sold for
delayed  delivery.  The  underwriters  and the other  persons  will not have any
responsibility in respect of the validity or performance of the contracts.

    Unless otherwise specified in the related prospectus supplement, each series
of offered securities,  other than shares of Class A common stock, will be a new
issue with no established  trading market. Our Class A common stock is listed on
the NYSE and traded  under the symbol  "AMT." Any shares of Class A common stock
sold pursuant to a prospectus  supplement will be listed on the NYSE, subject to
official  notice of issuance.  We may elect to list any other series or class of
offered  securities on an exchange or on the Nasdaq National Market, but are not
obligated to do so. Any  underwriters to whom offered  securities are sold by us
for  public  offering  and sale may make a market in those  offered  securities.
Underwriters  will  not be  obligated  to  make  any  market,  however,  and may
discontinue  any market making at any time without  notice.  No assurance can be
given as to the liquidity of or the trading markets for any offered securities.

    Certain of the  underwriters and their affiliates may engage in transactions
with and perform  services for us in the  ordinary  course of business for which
they receive compensation.

    The  specific  terms and manner of sale of the  offered  securities  will be
shown or summarized in the applicable prospectus supplement.

                       VALIDITY OF THE OFFERED SECURITIES

    Sullivan & Worcester LLP, Boston, Massachusetts, will pass upon the validity
of the offered  securities  for us. Norman A.  Bikales,  a member of the firm of
Sullivan & Worcester LLP, and as of May 26, 2000, was the owner of 11,000 shares
of our Class A common  stock and 41,490  shares of Class B common  stock and had
options to purchase  20,000  shares of Class A common  stock at $10.00 per share
and 25,000  shares of Class A common  stock at $23.813  per share.  Mr.  Bikales
and/or  associates of that firm serve as secretary or assistant  secretaries  of
American Tower and certain of our subsidiaries.

                                     EXPERTS

     The  consolidated   financial  statements  of  American  Tower  Corporation
incorporated in this  prospectus by reference from American Tower  Corporation's
annual  report  on Form  10-K for the year  ended  December  31,  1999 have been
audited  by  Deloitte & Touche  LLP,  independent  auditors,  as stated in their
report, which is incorporated herein by reference,  and has been so incorporated
in reliance  upon the report of such firm given upon their  authority as experts
in accounting and auditing.

    We are incorporating the following financial statements by reference in this
prospectus from our Form 8-K dated March 30, 2000:

o   The consolidated  financial statements of UNIsite,  Inc. and subsidiaries as
    of December  31, 1999 and 1998 and for the three  years ended  December  31,
    1999 have been  incorporated  by  reference  herein and in the  registration
    statement  in reliance  upon the report of KPMG LLP,  independent  certified
    public accountants, incorporated by reference herein, and upon the authority
    of said firm as experts in accounting and auditing.

o   The consolidated  financial  statements of ICG Satellite Services,  Inc. and
    subsidiary as of November 30, 1999 and for the eleven months ended  November
    30, 1999 have been  incorporated by reference herein and in the registration
    statement  in reliance  upon the report of KPMG LLP,  independent  certified
    public accountants, incorporated by reference herein, and upon the authority
    of said firm as experts in accounting and auditing.

                                      -21-
<PAGE>
                               WHERE YOU CAN FIND
                                MORE INFORMATION

    We file annual,  quarterly and current  reports,  proxy statements and other
information with the SEC. You may read and copy any reports, statements or other
information  on file at the SEC's  public  reference  room at 450 Fifth  Street,
N.W.,  Washington,  D.C.  20549.  You can request copies of those documents upon
payment  of a  duplicating  fee to the SEC.  You may  also  review a copy of the
registration  statement at the SEC's regional  offices in Chicago,  Illinois and
New  York,  New  York.  Please  call  the  SEC  at  1-800-SEC-0330  for  further
information on the operation of the public  reference  rooms. You can review our
SEC filings and the registration  statement by accessing the SEC's Internet site
at http://www.sec.gov.

                             DOCUMENTS INCORPORATED
                                  BY REFERENCE

    The SEC allows us to "incorporate by reference" the information we file with
them, which means that we can disclose important information to you by referring
you to those documents.  The information incorporated by reference is considered
to be part of this  prospectus.  Statements  in this  prospectus  regarding  the
contents of any contract or other document may not be complete. You should refer
to the  copy of the  contract  or other  document  filed  as an  exhibit  to the
registration  statement.  Later  information  filed with the SEC will update and
supersede  information  we have  included or  incorporated  by reference in this
prospectus.

    We incorporate by reference the documents  listed below and any filings made
after the date of the  original  filing of the  registration  statement of which
this  prospectus is a part made with the SEC under Section 13(a),  13(c),  14 or
15(d) of the Securities  Exchange Act of 1934 until our offering is completed or
terminated:

o   our Annual Report on Form 10-K for the fiscal year ended December 31, 1999,

o   our Quarterly Report on Form 10-Q for the quarter ended March 31, 2000,

o   our Current  Reports on Form 8-K dated  January 28, 2000,  January 31, 2000,
    February 9, 2000,  February 24, 2000,  March 14, 2000, March 30, 2000, April
    13, 2000, May 15, 2000 and May 23, 2000, and

o   the  description of our Class A common stock  contained in our  registration
    statement on Form 8-A (File No. 001-14195), filed on June 4, 1998.

    We will provide you with a copy of the  information we have  incorporated by
reference,  excluding exhibits other than those to which we specifically  refer.
You may obtain this  information at no cost by writing or telephoning us at: 116
Huntington  Avenue,  Boston,  Massachusetts  02116,  (617) 375-7500,  Attention:
Director of Investor Relations.


                                      -22-
<PAGE>



                                     [LOGO]



                                      -23-
<PAGE>

                                     PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

Set forth below is an estimate (except in the case of the  registration  fee) of
the amount of fees and expenses to be incurred in  connection  with the issuance
and  distribution  of the  Offered  Securities  registered  hereby,  other  than
underwriting discounts and commissions.

        Registration fee under Securities Act...............       $ 264,000
        Blue sky fees and expenses..........................          10,000
        Accounting fees and expenses........................         400,000
        Legal fees and expenses.............................         400,000
        Printing and engraving..............................         200,000
        Rating agencies fees................................         100,000
        Miscellaneous fees and expenses.....................         150,000
                                                                ------------
            Total: .........................................      $1,524,000
                                                                ============

    Item 15. Indemnification of Directors and Officers.

    Section 145 of the Delaware General  Corporation Laws ("DGCL") provides,  in
effect, that any person made a party to any action by reason of the fact that he
is or was a director,  officer,  employee or agent of American Tower Corporation
(the  "Company") may and, in certain  cases,  must be indemnified by the Company
against, in the case of a non-derivative action, judgments,  fines, amounts paid
in settlement and reasonable expenses (including  attorney's fees), if in either
type of action he acted in good faith and in a manner he reasonably  believed to
be  in  or  not  opposed  to  the  best  interests  of  the  Company  and,  in a
non-derivative  action,  which  involves  a criminal  proceeding,  in which such
person had no  reasonable  cause to  believe  his  conduct  was  unlawful.  This
indemnification  does not apply, in a derivative  action, to matters as to which
it is adjudged  that the director,  officer,  employee or agent is liable to the
Company,   unless  upon  court  order  it  is  determined  that,   despite  such
adjudication of liability,  but in view of all the circumstances of the case, he
is fairly and reasonably entitled to indemnity for expenses.

    Article  XII of the  Company's  By-Laws  provides  that  the  Company  shall
indemnify each person who is or was an officer or director of the Company to the
fullest extent permitted by Section 145 of the DGCL.

    Article Sixth of the Company's restated  certificate of incorporation states
than no director of the Company shall be personally liable to the Company or its
stockholders  for monetary  damages for breach of fiduciary  duty as a director,
except for (i) breach of the  director's  duty of loyalty to the  Company or its
stockholders,  (ii)  acts  or  omissions  not in good  faith  or  which  involve
intentional  misconduct  or knowing  violation  of law,  (iii)  liability  under
Section  174 of the DGCL  relating  to  certain  unlawful  dividends  and  stock
repurchases, or (iv) any transaction from which the director derived an improper
personal benefit.

    Reference is made to the Underwriting  Agreements  (Exhibits 1.1 through 1.5
hereto)  which  may  contain  certain  provisions  for  indemnification  by  the
underwriters of the Company,  directors,  officers and controlling persons under
certain circumstances.

    Item 16. Exhibits.

    Listed below are the exhibits  which are filed as part of this  Registration
Statement on Form S-3  (according to the number  assigned to them in Item 601 of
Regulation  S-K).  Each  exhibit  marked by a (*) is to be filed

                                      II-1
<PAGE>

by amendment or  incorporated  by reference in  connection  with the offering of
Offered Securities, as appropriate.
<TABLE>
<CAPTION>
Exhibit   Description of Document                                         Exhibit File No.
- --------  ------------------------                                        ----------------
No.
- ---
<S>      <C>                                                             <C>

1.1       Form of Underwriting Agreement (for Debt Securities)            *
1.2       Form of Underwriting Agreement (for Preferred Stock)            *
1.3       Form of Underwriting Agreement (for Depositary Shares)          *
1.4       Form of Underwriting Agreement (for Common Stock)               *
1.5       Form of Underwriting Agreement (for Warrants)                   *
3.1       Restated Certificate of Incorporation, as amended, of the
          Company as filed with the  Secretary  of State of the State of
          Delaware  on June 4, 1999                                       Incorporated by reference to Exhibit
                                                                          3(i) from the  Company's  Quarterly
                                                                          Report of Form 10-Q (File No. 001-
                                                                          14195) filed on August 16, 1999
3.2       By-Laws, as amended, of the Company                             Filed herewith as Exhibit 3.2
4.1       Form of Senior Indenture                                        Filed herewith as Exhibit 4.1
4.2       Form of Subordinated Indenture                                  Filed herewith as Exhibit 4.2
4.3       Form of Senior Debt Security                                    *
4.4       Form of Subordinated Debt Security                              *
4.5       Form of Deposit Agreement, including form of Depositary Receipt
          for Depositary Shares                                           *
4.6       Form of Certificate of Designation for Preferred Stock          *
4.7       Form of Preferred Stock Certificate                             *
4.8       Form of Debt Warrant Agreement, including form of Debt Warrant  *

4.9       Form of Preferred Stock Warrant Agreement, including form of
          Preferred Stock Warrant                                         *
4.10      Form of Common Stock Warrant Agreement, including form of
          Common Stock Warrant                                            *
5         Opinion of Sullivan & Worcester LLP                             Filed herewith as Exhibit 5
8         Tax Opinion of Sullivan & Worcester LLP                         *
12        Statement Regarding Computation of Ratios of Earnings to Fixed
          Charges                                                         Filed herewith as Exhibit 12
23.1      Consent of Sullivan & Worcester LLP                             Contained in the opinion of Sullivan &
                                                                          Worcester LLP filed herewith as part
                                                                          of Exhibit 5
23.2      Consent of Deloitte & Touche LLP                                Filed herewith as Exhibit 23.2
23.3      Consent of KPMG LLP                                             Filed herewith as Exhibit 23.3
23.4      Consent of KPMG LLP                                             Filed herewith as Exhibit 23.4
24        Power of Attorney                                               Filed herewith as page II-5 of the
                                                                          Registration Statement
25        Statement of Eligibility of Trustee on Form T-1                 *

</TABLE>
Item 17. Undertakings.

(a) 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

                                      II-2
<PAGE>

          forth in this 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 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 this registration statement; and

          (iii) To include any material  information with respect to the plan of
          distribution not previously  disclosed in this registration  statement
          or any  material  change  to such  information  in  this  registration
          statement;

provided,  however,  that the undertakings set forth in paragraphs (a)(1)(i) and
(a)(1)(ii)  above do not apply if the  information  required to be included in a
post-effective  amendment by those  paragraphs is contained in periodic  reports
filed with or furnished to the Commission by the registrant  pursuant to Section
13 or 15(d) of the  Securities  Exchange  Act of 1934 that are  incorporated  by
reference in this registration statement.

     (2) That, for the purpose of determining any liability under the Securities
     Act of 1933, 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.

(b)  The  undersigned   registrant  hereby  undertakes  that,  for  purposes  of
determining  any liability  under the Securities Act of 1933, each filing of the
registrant's  annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange  Act of 1934 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.

(c) Insofar as indemnification  for liabilities arising under the Securities Act
of 1933 may be permitted to directors,  officers and controlling  persons of the
registrant   pursuant  to  the  provisions  referred  to  in  Item  15  of  this
registration  statement,  or otherwise,  the registrant has been advised that in
the opinion of the Securities and Exchange  Commission such  indemnification  is
against public policy as expressed in the 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 of the registrant in the successful defense of any
action, suit or proceeding) is asserted by such 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 Act and
will be governed by the final adjudication of such issue.

(d) The undersigned registrant hereby undertakes:

     (1) To file an application  for the purpose of determining  the eligibility
     of the  trustee to act under  subsection  (a) of  Section  310 of the Trust
     Indenture Act in accordance  with the rules and  regulations  prescribed by
     the Commission under Section 305(b)(2) of the Act.

     (2) That for purposes of determining any liability under the Securities Act
     of 1933, the information  omitted from the form of Prospectus filed as part
     of this Registration  Statement in

                                      II-3
<PAGE>

     reliance upon Rule 430A and contained in a form of prospectus  filed by the
     registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities
     Act  shall be deemed to be part of this  Registration  Statement  as of the
     time it was effective.

     (3) That for the purpose of determining  any liability under the Securities
     Act of  1933,  each  post-effective  amendment  that  contains  a  form  of
     prospectus 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 initial bona fide offering thereof.


                                      II-4
<PAGE>

                                   SIGNATURES

Pursuant  to  the  requirements  of the  Securities  Act of  1933,  the  Company
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City of Boston,  Commonwealth of Massachusetts,  on the 26th
day of May, 2000.

                                   AMERICAN TOWER CORPORATION


                                   By: /s/ Steven B Dodge
                                       Steven B. Dodge
                                       Chairman of the Board, President and
                                       Chief Executive Officer

The  undersigned   officers  and  directors  of  the  Company  hereby  severally
constitute  Joseph L. Winn,  Justin D.  Benincasa,  Jonathan Black and Norman A.
Bikales,  and each of them, acting singly, our true and lawful attorneys to sign
for us and  in  our  names  in the  capacities  indicated  below  the  Company's
Registration  Statement  on  Form  S-3  relating  to the  registration  of  such
securities  under  the  Securities  Act of  1933,  as  amended,  and any and all
amendments thereto,  including without limitation any registration  statement or
post-effective  amendment  thereof filed under and meeting the  requirements  of
Rule 462(b) under the  Securities  Act,  hereby  ratifying  and  confirming  our
signatures as they may be signed by our attorneys to such Registration Statement
and any and all amendments thereto.

Pursuant to the  requirements of the Securities Act of 1933,  this  Registration
Statement  has been  signed  below by the  following  persons  on  behalf of the
Company and in the capacities and on the dates indicated.

     Signature                          Title                          Date
     ---------  -                       -----                          ----

/s/ Steven B. Dodge          Chairman, President, Chief             May 26, 2000
Steven B. Dodge              Executive Officer and Director


/s/ Joseph L. Winn           Chief Financial Officer and            May 26, 2000
Joseph L. Winn               Treasurer

/s/ Justin D. Benincasa      Vice President and Corporate           May 26, 2000
Justin D. Benincasa          Controller

________________________     Executive Vice President and           May 26, 2000
Alan L. Box                  Director

________________________     Director                               May 26, 2000
Arnold L. Chavkin

/s/ Dean H. Eisner           Director                               May 26, 2000
Dean H. Eisner


                                      II-5
<PAGE>

/s/ Jack D. Furst            Director                               May 26, 2000
Jack D. Furst

/s/ J. Michael Gearon, Jr.   Executive Vice President and           May 26, 2000
J. Michael Gearon, Jr.       Director

/s/ Fred R. Lummis           Director                               May 26, 2000
Fred R. Lummis

________________________     Director                               May 26, 2000
Randall Mays

/s/ Thomas H. Stoner         Director                               May 26, 2000
Thomas H. Stoner

________________________     Director                               May 26, 2000
Maggie Wilderotter


                                      II-6
<PAGE>
                                  EXHIBIT INDEX

Listed  below are the  exhibits  which  are  filed as part of this  Registration
Statement on Form S-3  (according to the number  assigned to them in Item 601 of
Regulation  S-K).  Each  exhibit  Marked by a (*) is to be filed by amendment or
incorporated by reference in connection with the offering of Offered Securities,
as appropriate.  Exhibit  numbers in parenthesis  refer to the exhibit number in
the applicable filing.


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

1.1       Form of Underwriting Agreement (for Debt Securities)            *
1.2       Form of Underwriting Agreement (for Preferred Stock)            *
1.3       Form of Underwriting Agreement (for Depositary Shares)          *
1.4       Form of Underwriting Agreement (for Common Stock)               *
1.5       Form of Underwriting Agreement (for Warrants)                   *
3.1       Restated Certificate of Incorporation, as amended, of the
          Company as filed with the  Secretary  of State of the State of
          Delaware  on June 4, 1999                                       Incorporated by reference to Exhibit
                                                                          3(i) from the  Company's  Quarterly
                                                                          Report of Form 10-Q (File No. 001-
                                                                          14195) filed on August 16, 1999
3.2       By-Laws, as amended, of the Company                             Filed herewith as Exhibit 3.2
4.1       Form of Senior Indenture                                        Filed herewith as Exhibit 4.1
4.2       Form of Subordinated Indenture                                  Filed herewith as Exhibit 4.2
4.3       Form of Senior Debt Security                                    *
4.4       Form of Subordinated Debt Security                              *
4.5       Form of Deposit Agreement, including form of Depositary Receipt
          for Depositary Shares                                           *
4.6       Form of Certificate of Designation for Preferred Stock          *
4.7       Form of Preferred Stock Certificate                             *
4.8       Form of Debt Warrant Agreement, including form of Debt Warrant  *

4.9       Form of Preferred Stock Warrant Agreement, including form of
          Preferred Stock Warrant                                         *
4.10      Form of Common Stock Warrant Agreement, including form of
          Common Stock Warrant                                            *
5         Opinion of Sullivan & Worcester LLP                             Filed herewith as Exhibit 5
8         Tax Opinion of Sullivan & Worcester LLP                         *
12        Statement Regarding Computation of Ratios of Earnings to Fixed
          Charges                                                         Filed herewith as Exhibit 12
23.1      Consent of Sullivan & Worcester LLP                             Contained in the opinion of Sullivan &
                                                                          Worcester LLP filed herewith as part
                                                                          of Exhibit 5
23.2      Consent of Deloitte & Touche LLP                                Filed herewith as Exhibit 23.2
23.3      Consent of KPMG LLP                                             Filed herewith as Exhibit 23.3
23.4      Consent of KPMG LLP                                             Filed herewith as Exhibit 23.4
24        Power of Attorney                                               Filed herewith as page II-5 of the
                                                                          Registration Statement
25        Statement of Eligibility of Trustee on Form T-1                 *

</TABLE>

                                                                     EXHIBIT 3.2

                                     BY-LAWS

                                       OF

                          AMERICAN TOWER CORPORATION*
                            (a Delaware Corporation)

















- --------
* As amended through May 24, 2000.

<PAGE>
<TABLE>
<CAPTION>
                           AMERICAN TOWER CORPORATION
                            (a Delaware Corporation)

                                     BY-LAWS
                                TABLE OF CONTENTS

                                                                                                             Page
<S>                          <C>                                                                             <C>
ARTICLE I.                    OFFICES.....................................................................    1

         SECTION 1.           Registered Office...........................................................    1
         SECTION 2.           Other Offices...............................................................    1

ARTICLE II.                   SEAL........................................................................    1

ARTICLE III.                  MEETINGS OF STOCKHOLDERS....................................................    1

         SECTION 1.           Place of Meeting............................................................    1
         SECTION 2.           Annual Meetings.............................................................    1
         SECTION 3.           Special Meetings............................................................    1
         SECTION 4.           Notice......................................................................    2
         SECTION 5.           Quorum and Adjournments.....................................................    2
         SECTION 6.           Votes; Proxies..............................................................    2
         SECTION 7.           Organization................................................................    3
         SECTION 8.           Consent of Stockholders in Lieu of Meeting..................................    3

ARTICLE IV.                   DIRECTORS...................................................................    4

         SECTION 1.           Number......................................................................    4
         SECTION 2.           Term of Office..............................................................    5
         SECTION 3.           Vacancies...................................................................    5
         SECTION 4.           Removal by Stockholders.....................................................    5
         SECTION 5.           Meetings....................................................................    5
         SECTION 6.           Votes.......................................................................    6
         SECTION 7.           Quorum and Adjournment......................................................    6
         SECTION 8.           Compensation................................................................    6
         SECTION 9.           Action By Consent of Directors..............................................    6

ARTICLE V.                    COMMITTEES OF DIRECTORS.....................................................    6

         SECTION 1.           Executive Committee.........................................................    6
         SECTION 2.           Audit Committee.............................................................    7
         SECTION 3.           Other Committees............................................................    8
         SECTION 4.           Term of Office..............................................................    9

                                      -i-

<PAGE>



ARTICLE VI.                   OFFICERS....................................................................   9

         SECTION 1.           Officers....................................................................   9
         SECTION 2.           Vacancies...................................................................   9
         SECTION 3.           Chairman of the Board.......................................................   9
         SECTION 4.           President...................................................................   9
         SECTION 5.           Executive Vice Presidents and Vice Presidents...............................   9
         SECTION 6.           Secretary...................................................................   9
         SECTION 7.           Assistant Secretaries.......................................................   10
         SECTION 8.           Treasurer...................................................................   10
         SECTION 9.           Assistant Treasurers........................................................   10
         SECTION 10.          Controller..................................................................   10
         SECTION 11.          Assistant Controller........................................................   10
         SECTION 12.          Subordinate Officers........................................................   11
         SECTION 13.          Compensation................................................................   11
         SECTION 14.          Removal.....................................................................   11
         SECTION 15.          Bonds.......................................................................   11

ARTICLE VII.                  CERTIFICATES OF STOCK.......................................................   11

         SECTION 1.           Form and Execution of Certificates..........................................   11
         SECTION 2.           Transfer of Shares..........................................................   12
         SECTION 3.           Closing of Transfer Books...................................................   12
         SECTION 4.           Fixing Date for Determination of Stockholders of Record.....................   12
         SECTION 5.           Lost or Destroyed Certificates..............................................   13
         SECTION 6.           Uncertificated Shares.......................................................   14

ARTICLE VIII.                 EXECUTION OF DOCUMENTS......................................................   14

         SECTION 1.           Execution of Checks, Notes, etc.............................................   14
         SECTION 2.           Execution of Contracts, Assignments, etc....................................   14
         SECTION 3.           Execution of Proxies........................................................   14

ARTICLE IX.                   INSPECTION OF BOOKS.........................................................   14

ARTICLE X.                    FISCAL YEAR.................................................................   15

ARTICLE XI.                   AMENDMENTS..................................................................   15

ARTICLE XII.                  INDEMNIFICATION.............................................................   15

         SECTION 1.           Indemnification.............................................................   15
         SECTION 2.           Authorization...............................................................   16
         SECTION 3.           Expense Advance.............................................................   16
         SECTION 4.           Nonexclusivity..............................................................   16
         SECTION 5.           Insurance...................................................................   17
         SECTION 6.           "The Corporation"...........................................................   17
         SECTION 7.           Other Indemnification.......................................................   17

                                      -ii-
<PAGE>

         SECTION 8.           Other Definitions...........................................................   17
         SECTION 9.           Continuation of Indemnification.............................................   17
         SECTION 10.          Amendment or Repeal.........................................................   18
</TABLE>

                                     -iii-
<PAGE>
                          AMERICAN TOWER CORPORATION
                            (a Delaware Corporation)



                                     BY-LAWS


                                    ARTICLE I


                                     OFFICES

         SECTION 1. Registered  Office. The registered office of the Corporation
shall be located in Wilmington, County of New Castle, State of Delaware, and the
name of the  resident  agent in  charge  thereof  shall be  Corporation  Service
Company.

         SECTION 2. Other Offices. The Corporation may also have offices at such
other places, within or without the State of Delaware, as the Board of Directors
may from time to time appoint or the business of the Corporation may require.

                                   ARTICLE II

                                      SEAL

         The seal of the Corporation  shall,  subject to alteration by the Board
of  Directors,  consist of a flat-faced  circular die with the word  "Delaware",
together with the name of the Corporation and the year of incorporation,  cut or
engraved thereon.

                                   ARTICLE III

                            MEETINGS OF STOCKHOLDERS

         SECTION 1. Place of Meeting. Meetings of the stockholders shall be held
either  within or without  the State of  Delaware  at such place as the Board of
Directors may fix from time to time.

         SECTION 2. Annual Meetings. The annual meeting of stockholders shall be
held for the election of directors on such date and at such time as the Board of
Directors may fix from time to time. Any other proper business may be transacted
at the annual meeting.

         SECTION 3. Special  Meetings.  Special meetings of the stockholders for
any purpose or purposes may be called by the Chairman of the Board of Directors,
if there be one, the President or by the directors (either by written instrument
signed by a majority or by resolution  adopted by a vote of the  majority),  and
special  meetings  shall be called by the  President or the  Secretary  whenever
stockholders  owning a majority of the capital  stock  issued,  outstanding  and
entitled to

                                      -1-
<PAGE>

vote so request in writing. Such request of stockholders shall state the purpose
or purposes of the proposed meeting.

         SECTION  4.  Notice.  Written  or  printed  notice of every  meeting of
stockholders,  annual or special,  stating the hour, date and place thereof, and
the purpose or purposes in general  terms for which the meeting is called shall,
not less than ten (10) days,  or such longer period as shall be provided by law,
the Certificate of Incorporation, these By-Laws, or otherwise, and not more than
sixty  (60)  days  before  such  meeting,  be  served  upon  or  mailed  to each
stockholder  entitled to vote thereat,  at the address of such stockholder as it
appears upon the stock records of the Corporation or, if such stockholder  shall
have filed with the Secretary of the  Corporation a written request that notices
be mailed to some other address, then to the address designated in such request.

         Notice  of  the  hour,  date,  place  and  purpose  of any  meeting  of
stockholders may be dispensed with if every stockholder entitled to vote thereat
shall attend either in person or by proxy and shall not, at the beginning of the
meeting,  object to the holding of such meeting because the meeting has not been
lawfully  called or convened,  or if every absent  stockholder  entitled to such
notice shall in writing, filed with the records of the meeting, either before or
after the holding thereof, waive such notice.

         SECTION 5. Quorum and Adjournments. Except as otherwise provided by law
or by the  Certificate of  Incorporation,  the presence in person or by proxy at
any  meeting of  stockholders  of the holders of a majority of the shares of the
capital stock of the  Corporation  issued and  outstanding  and entitled to vote
thereat,  shall be  requisite  and shall  constitute  a  quorum.  So long as the
Certificate  of  Incorporation  provides  for more or less than one vote for any
share,  or any matter,  every  reference in these By-Laws to a majority or other
proportion  of shares shall refer to such  majority or other  proportion  of the
votes of such  shares.  If two or more  classes of stock are entitled to vote as
separate  classes upon any  question,  then,  in the case of each such class,  a
quorum  for the  consideration  of such  question  shall,  except  as  otherwise
provided by law or by the Certificate of Incorporation, consist of a majority in
interest of all stock of that class issued, outstanding and entitled to vote. If
a  majority  of the  shares  of  capital  stock of the  Corporation  issued  and
outstanding  and entitled to vote thereat or, where a larger quorum is required,
such  quorum,  shall  not be  represented  at any  meeting  of the  stockholders
regularly called, the holders of a majority of the shares present or represented
by proxy and entitled to vote thereat shall have power to adjourn the meeting to
another  time,  or  to  another  time  and  place,  without  notice  other  than
announcement  of  adjournment  at the  meeting,  and  there  may  be  successive
adjournments  for like cause and in like manner  until the  requisite  amount of
shares entitled to vote at such meeting shall be represented; provided, however,
that if the  adjournment is for more than thirty (30) days,  notice of the hour,
date  and  place of the  adjourned  meeting  shall be given to each  stockholder
entitled to vote thereat. Subject to the requirements of law and the Certificate
of  Incorporation,  on any  issue  on which  two or more  classes  of stock  are
entitled to vote separately,  no adjournment  shall be taken with respect to any
class for which a quorum is present unless the Chairman of the meeting otherwise
directs.  At any  meeting  held  to  consider  matters  which  were  subject  to
adjournment  for want of a quorum  at  which  the  requisite  amount  of  shares
entitled to vote thereat  shall be  represented,  any business may be transacted
which might have been transacted at the meeting as originally noticed.

                                      -2-
<PAGE>

         SECTION  6.  Votes;  Proxies.  Except  as  otherwise  provided  in  the
Certificate of Incorporation, at each meeting of stockholders, every stockholder
of record at the closing of the transfer books, if closed, or on the date set by
the Board of Directors for the determination of stockholders entitled to vote at
such meeting, shall have one vote for each share of stock entitled to vote which
is registered in such stockholder's  name on the books of the Corporation,  and,
in the election of directors,  may vote  cumulatively to the extent, if any, and
in the manner authorized in the Certificate of Incorporation.

         At each  such  meeting  every  stockholder  entitled  to vote  shall be
entitled to do so in person,  or by proxy  appointed by an instrument in writing
or as otherwise  permitted by law subscribed by such  stockholder  and bearing a
date not more than three (3) years prior to the meeting in question, unless said
instrument provides for a longer period during which it is to remain in force. A
duly executed proxy shall be irrevocable if it states that it is irrevocable and
if, and only as long as, it is coupled  with an  interest  sufficient  in law to
support an  irrevocable  power.  A proxy may be made  irrevocable  regardless of
whether the interest with which it is coupled is an interest in the stock itself
or any interest in the Corporation generally. A stockholder may revoke any proxy
which is not  irrevocable  by  attending  the meeting and voting in person or by
filing with the  Secretary of the  Corporation  an  instrument  in writing or as
otherwise  permitted by law revoking  the proxy or another duly  executed  proxy
bearing a later date.

         Voting at meetings of  stockholders  need not be by written ballot and,
except as  otherwise  provided by law,  need not be conducted by an inspector of
election  unless so  determined by the Chairman of the meeting or by the holders
of shares of stock  having a majority  of the votes  which  could be cast by the
holders of all  outstanding  shares of stock  entitled to vote thereon which are
present in person or represented by proxy at such meeting.  If it is required or
determined  that an  inspector  of election be  appointed,  the  Chairman  shall
appoint one inspector of election, who shall first take and subscribe an oath or
affirmation  faithfully  to execute the duties of an  inspector  at such meeting
with  strict  impartiality  and  according  to  the  best  of his  ability.  The
inspectors so appointed shall take charge of the polls and, after the balloting,
shall  make a  certificate  of the  result of the vote  taken.  No  director  or
candidate for the office of director shall be appointed as such inspector.

         At any meeting at which a quorum is present,  a plurality  of the votes
properly  cast for election to fill any vacancy on the Board of Directors  shall
be sufficient  to elect a candidate to fill such vacancy,  and a majority of the
votes properly cast upon any other question shall decide the question, except in
any  case  where  a  larger  vote  is  required  by  law,  the   Certificate  of
Incorporation, these By-Laws, or otherwise.

         SECTION 7. Organization. The Chairman of the Board, if there be one, or
in his or her absence the Vice  Chairman,  or in the absence of a Vice Chairman,
the President, or in the absence of the President, a Vice President,  shall call
meetings of the  stockholders  to order and shall act as chairman  thereof.  The
Secretary of the Corporation, if present, shall act as secretary of all meetings
of stockholders, and, in his or her absence, the presiding officer may appoint a
secretary.

         SECTION 8. Consent of Stockholders in Lieu of Meeting. Unless otherwise
restricted by the Certificate of Incorporation, any action required or permitted
by the  Delaware  General

                                      -3-
<PAGE>

Corporation Law to be taken at any annual or special meeting of the stockholders
of the  Corporation,  may be taken  without a meeting,  without prior notice and
without a vote, if a consent or consents in writing, setting forth the action so
taken,  shall be signed by the holders of outstanding stock having not less than
the minimum  number of votes that would be  necessary  to authorize or take such
action at a meeting at which all shares  entitled to vote  thereon  were present
and  voted  and  shall  be  delivered  to the  Corporation  by  delivery  to its
registered office in Delaware, its principal place of business, or an officer or
agent of the  Corporation  having  custody of the book in which  proceedings  of
meetings  of  stockholders  are  recorded.  Delivery  made to the  Corporation's
registered  office shall be by hand or by certified or registered  mail,  return
receipt requested.

         Every  written  consent  shall  bear  the  date  of  signature  of each
stockholder  who signs the consent and no written  consent shall be effective to
take the corporate action referred to therein unless,  within sixty (60) days of
the earliest dated consent  delivered in the manner  required by this section to
the Corporation,  written consents signed by a sufficient number of stockholders
to take action are delivered to the  corporation  by delivery to its  registered
office in Delaware,  its principal place of business,  or an officer or agent of
the Corporation  having custody of the book in which  proceedings of meetings of
stockholders are recorded.  Delivery made to the Corporation's registered office
shall be by hand or by certified or registered mail, return receipt requested.

         Prompt notice of the taking of the corporate  action  without a meeting
by less than unanimous written consent shall be given to those  stockholders who
have not  consented in writing.  In the event that the action which is consented
to is such as would have required the filing of a certificate  under any section
of the Delaware General  Corporation Law other than Section 228 thereof, if such
action had been voted on by stockholders at a meeting  thereof,  the certificate
filed under such other section shall state, in lieu of any statement required by
such section concerning any vote of stockholders,  that written consent has been
given in accordance with Section 228 of the Delaware  General  Corporation  Law,
and that written notice has been given as provided in such Section 228.

                                   ARTICLE IV

                                    DIRECTORS

         SECTION 1. Number. The business and affairs of the Corporation shall be
conducted  and managed by a Board of Directors  consisting  of not less than one
director,  none of whom needs to be a  stockholder.  The number of directors for
each year  shall be fixed at each  annual  meeting of  stockholders,  but if the
number is not so fixed, the number shall remain as it stood immediately prior to
such meeting.

         At each annual meeting of stockholders,  the  stockholders  shall elect
directors. Each director so elected shall hold office, subject to the provisions
of law, the Certificate of Incorporation, these By-Laws, or otherwise, until the
next annual meeting of stockholders or until his or her successor is elected and
qualified.

         At any time during any year,  except as otherwise  provided by law, the
Certificate  of  Incorporation,  these  By-Laws,  or  otherwise,  the  number of
directors may be increased or

                                      -4-
<PAGE>

reduced,  in each case by vote of a majority of the stock issued and outstanding
and  present  in person or  represented  by proxy and  entitled  to vote for the
election of  directors  or a majority of the  directors in office at the time of
such increase or decrease,  regardless  of whether such  majority  constitutes a
quorum.

         SECTION 2. Term of Office.  Each  director  shall hold office until the
next  annual  meeting of  stockholders  and until his or her  successor  is duly
elected and qualified or until his or her earlier death or resignation,  subject
to the right of the stockholders at any time to remove any director or directors
as provided in Section 4 of this Article.

         SECTION 3.  Vacancies.  If any vacancy shall occur among the directors,
or if the number of directors shall at any time be increased, the directors then
in  office,  although  less  than a  quorum,  by a  majority  vote  may fill the
vacancies  or  newly-   created   directorships,   or  any  such   vacancies  or
newly-created directorships may be filled by the stockholders at any meeting.

         SECTION 4. Removal by  Stockholders.  Except as  otherwise  provided by
law, the Certificate of Incorporation or otherwise, the holders of record of the
capital stock of the Corporation  entitled to vote for the election of directors
may,  by a majority  vote,  remove any  director or  directors,  with or without
cause,  and, in their  discretion,  elect a new  director or  directors in place
thereof.

         SECTION 5. Meetings.  Meetings of the Board of Directors  shall be held
at such place, within or without the State of Delaware, as may from time to time
be fixed by  resolution  of the Board of  Directors  or by the  Chairman  of the
Board,  if there be one, or by the  President,  and as may be  specified  in the
notice or waiver of notice of any meeting. Meetings may be held at any time upon
the call of the Chairman of the Board,  if there be one, or the President or any
two (2) of the  directors  in office by oral,  telegraphic,  telex,  telecopy or
other form of electronic transmission, or written notice, duly served or sent or
mailed to each  director  not less  than  twenty-four  (24)  hours  before  such
meeting,  except  that,  if mailed,  not less than seventy two (72) hours before
such meeting.

         Meetings  may be held at any time and place  without  notice if all the
directors  are present and do not object to the holding of such meeting for lack
of proper  notice or if those not  present  shall,  in writing  or by  telegram,
telex, telecopy or other form of electronic transmission,  waive notice thereof.
A regular meeting of the Board may be held without notice immediately  following
the annual  meeting of  stockholders  at the place  where such  meeting is held.
Regular  meetings of the Board may also be held without  notice at such time and
place as shall  from time to time be  determined  by  resolution  of the  Board.
Except as  otherwise  provided  by law,  the  Certificate  of  Incorporation  or
otherwise,  neither the  business to be  transacted  at, nor the purpose of, any
regular or special  meeting of the Board of Directors or any  committee  thereof
need be specified in any written waiver of notice.

         Members  of the  Board  of  Directors  or  any  committee  thereof  may
participate  in a meeting  of such  Board or  committee  by means of  conference
telephone  or similar  communications  equipment  by means of which all  persons
participating in the meeting can hear each other and  participation in a meeting
pursuant to the foregoing  provisions shall constitute presence in person at the
meeting.

                                      -5-
<PAGE>

         SECTION 6. Votes.  Except as otherwise provided by law, the Certificate
of Incorporation or otherwise, the vote of the majority of the directors present
at a  meeting  at which a quorum  is  present  shall be the act of the  Board of
Directors.

         SECTION 7. Quorum and Adjournment. Except as otherwise provided by law,
the Certificate of Incorporation or otherwise, a majority of the directors shall
constitute a quorum for the  transaction  of business.  If at any meeting of the
Board there shall be less than a quorum present, a majority of those present may
adjourn the meeting from time to time without notice other than  announcement of
the adjournment at the meeting,  and at such adjourned meeting at which a quorum
is present any business may be  transacted  which might have been  transacted at
the meeting as originally noticed.

         SECTION 8. Compensation. Directors shall receive compensation for their
services,  as such,  and for service on any Committee of the Board of Directors,
as fixed by  resolution of the Board of Directors and for expenses of attendance
at each  regular  or  special  meeting  of the Board or any  Committee  thereof.
Nothing in this Section  shall be construed to preclude a director  from serving
the Corporation in any other capacity and receiving compensation therefor.

         SECTION 9.  Action By  Consent of  Directors.  Any action  required  or
permitted  to be taken  at any  meeting  of the  Board  of  Directors  or of any
committee  thereof may be taken without a meeting if all members of the Board or
committee,  as the case may be, consent  thereto in writing,  and the writing or
writings are filed with the minutes of  proceedings  of the Board or  committee.
Such consent  shall be treated as a vote adopted at a meeting for all  purposes.
Such consents may be executed in one or more counterparts and not every Director
or committee member need sign the same counterpart.

                                    ARTICLE V

                             COMMITTEES OF DIRECTORS

         SECTION  1.  Executive  Committee.  The  Board  of  Directors  may,  by
resolution  passed  by a  majority  of the whole  Board,  appoint  an  Executive
Committee of one (1) or more members, to serve during the pleasure of the Board,
to consist of such directors as the Board may from time to time  designate.  The
Board of Directors shall designate the Chairman of the Executive Committee.

         (a)      Procedure.  The  Executive  Committee  shall,  by a vote  of a
                  majority  of its  members,  fix its own  times  and  places of
                  meeting,  determine the number of its members  constituting  a
                  quorum for the transaction of business,  and prescribe its own
                  rules of procedure, no change in which shall be made save by a
                  majority vote of its members.

         (b)      Responsibilities. During the intervals between the meetings of
                  the Board of  Directors,  except as otherwise  provided by the
                  Board  of  Directors  in   establishing   such   Committee  or
                  otherwise,  the  Executive  Committee  shall  possess  and may
                  exercise  all the  powers of the Board in the  management  and
                  direction  of the  business  and  affairs of the  Corporation;
                  provided,  however,  that the Executive  Committee  shall not,
                  except to the extent the Certificate of  Incorporation  or the

                                      -6-
<PAGE>

                  resolution  providing  for the  issuance  of  shares  of stock
                  adopted  by the Board of  Directors  as  provided  in  Section
                  151(a) of the Delaware General Business  Corporation Law, have
                  the power:

                           (i)      to amend or authorize  the  amendment of the
                                    Certificate   of   Incorporation   or  these
                                    By-Laws;

                           (ii)     to authorize the issuance of stock in excess
                                    of one  million  (1,000,000)  shares  in any
                                    single   transaction  or  group  of  related
                                    transactions;

                           (iii)    to authorize the payment of any dividend;

                           (iv)     to  adopt  an   agreement   of   merger   or
                                    consolidation    pursuant   to   which   the
                                    Corporation  will merge or consolidate or to
                                    recommend  to  the  stockholders  the  sale,
                                    lease or  exchange  of all or  substantially
                                    all  the   property   and  business  of  the
                                    Corporation;

                           (v)      to   recommend   to   the   stockholders   a
                                    dissolution,    or   a   revocation   of   a
                                    dissolution, of the Corporation; or

                           (vi)     to  adopt a  certificate  of  ownership  and
                                    merger   pursuant  to  Section  253  of  the
                                    Delaware   Business   Corporation  Law;  and
                                    further

         (c)      Reports. The Executive Committee shall keep regular minutes of
                  its  proceedings,  and all action by the  Executive  Committee
                  shall be  reported  promptly to the Board of  Directors.  Such
                  action shall be subject to review, amendment and repeal by the
                  Board,  provided  that no  rights  of third  parties  shall be
                  adversely affected by such review, amendment or repeal.

         (d)      Appointment   of  Additional   Members.   In  the  absence  or
                  disqualification of any member of the Executive Committee, the
                  member or  members  thereof  present  at any  meeting  and not
                  disqualified  from  voting,  whether  or  not  constituting  a
                  quorum, may unanimously appoint another member of the Board of
                  Directors to act at the meeting in place of any such absent or
                  disqualified member.

         SECTION 2. Audit  Committee.  The Board of Directors may, by resolution
passed by a majority of the whole Board,  appoint an Audit  Committee of one (1)
or more  members who shall not be officers or employees  of the  Corporation  to
serve during the pleasure of the Board.  The Board of Directors  shall designate
the Chairman of the Audit Committee.

         (a)      Procedure. The Audit Committee, by a vote of a majority of its
                  members,  shall fix its own times and places of meeting, shall
                  determine the number of its members  constituting a quorum for
                  the transaction of business, and shall prescribe its own rules
                  of  procedure,  no  change  in which  shall be made  save by a
                  majority vote of its members.

                                      -7-
<PAGE>

         (b)      Responsibilities.  The Audit Committee shall review the annual
                  financial   statements  of  the  Corporation  prior  to  their
                  submission to the Board of  Directors,  shall consult with the
                  Corporation's   independent  auditors,  and  may  examine  and
                  consider  such other  matters in relation to the  internal and
                  external audit of the  Corporation's  accounts and in relation
                  to the financial  affairs of the Corporation and its accounts,
                  including the selection and retention of independent auditors,
                  as the Audit Committee may, in its discretion, determine to be
                  desirable.

         (c)      Reports. The Audit Committee shall keep regular minutes of its
                  proceedings, and all action by the Audit Committee shall, from
                  time to time,  be  reported  to the Board of  Directors  as it
                  shall  direct.   Such  action  shall  be  subject  to  review,
                  amendment and repeal by the Board,  provided that no rights of
                  third  parties  shall be  adversely  affected by such  review,
                  amendment or repeal.

         (d)      Appointment   of  Additional   Members.   In  the  absence  or
                  disqualification  of any  member of the Audit  Committee,  the
                  member or  members  thereof  present  at any  meeting  and not
                  disqualified  from  voting,  whether  or  not  constituting  a
                  quorum, may unanimously appoint another member of the Board of
                  Directors to act at the meeting in place of any such absent or
                  disqualified member.

         SECTION 3. Other Committees.  The Board of Directors may, by resolution
passed by a majority of the whole  Board,  at any time appoint one or more other
committees from and outside of its own number. Every such committee must include
at least one member of the Board of  Directors.  The Board may from time to time
designate  or alter,  within the limits  permitted by law,  the  Certificate  of
Incorporation and this Article, if applicable,  the duties, powers and number of
members of such other committees or change their membership, and may at any time
abolish such other committees or any of them.

         (a)      Procedure. Each committee, appointed pursuant to this Section,
                  shall,  by a vote of a majority  of its  members,  fix its own
                  times  and  places of  meeting,  determine  the  number of its
                  members constituting a quorum for the transaction of business,
                  and prescribe  its own rules of procedure,  no change in which
                  shall be made save by a majority vote of its members.

         (b)      Responsibilities.  Each committee,  appointed pursuant to this
                  Section, shall exercise the powers assigned to it by the Board
                  of Directors in its discretion.

         (c)      Reports.  Each  committee  appointed  pursuant to this Section
                  shall keep regular minutes of  proceedings,  and all action by
                  each such committee  shall,  from time to time, be reported to
                  the Board of Directors as it shall  direct.  Such action shall
                  be  subject  to  review,  amendment  and  repeal by the Board,
                  provided  that no rights of third  parties  shall be adversely
                  affected by such review, amendment or repeal.

         (d)      Appointment   of  Additional   Members.   In  the  absence  or
                  disqualification  of any member of each  committee,  appointed
                  pursuant  to this  Section,  the  member  or  members  thereof
                  present  at any  meeting  and not  disqualified  from  voting,
                  whether or not constituting a quorum, may unanimously  appoint
                  another  member of the

                                      -8-
<PAGE>

                  Board of  Directors  (or,  to the  extent  permitted,  another
                  person) to act at the  meeting in place of any such  absent or
                  disqualified member.

         SECTION 4. Term of Office. Each member of a committee shall hold office
until the first meeting of the Board of Directors  following the annual  meeting
of  stockholders  (or  until  such  other  time as the  Board of  Directors  may
determine,  either in the vote  establishing the committee or at the election of
such  member or  otherwise)  and  until  his or her  successor  is  elected  and
qualified,  or until he or she sooner dies,  resigns, is removed, is replaced by
change of membership or becomes  disqualified by ceasing to be a director (where
membership on the Board is required), or until the committee is sooner abolished
by the Board of Directors.

                                   ARTICLE VI

                                    OFFICERS

         SECTION 1. Officers.  The Board of Directors shall elect a President, a
Secretary and a Treasurer, and, in their discretion, may elect a Chairman of the
Board,  a Vice Chairman of the Board,  a Controller,  and one or more  Executive
Vice Presidents,  Vice Presidents,  Assistant Secretaries,  Assistant Treasurers
and Assistant  Controllers  as deemed  necessary or  appropriate.  Such officers
shall be  elected  annually  by the  Board of  Directors  at its  first  meeting
following the annual  meeting of  stockholders  (or at such other meeting as the
Board of Directors determines), and each shall hold office for the term provided
by the vote of the Board,  except  that each will be  subject  to  removal  from
office in the discretion of the Board as provided herein.  The powers and duties
of more than one office may be exercised and performed by the same person.

         SECTION 2.  Vacancies.  Any vacancy in any office may be filled for the
unexpired  portion  of the term by the Board of  Directors,  at any  regular  or
special meeting.

         SECTION  3.  Chairman  of the  Board.  The  Chairman  of the  Board  of
Directors,  if elected,  shall be a member of the Board of  Directors  and shall
preside at its meetings. The Chairman, if other than the President, shall advise
and counsel with the  President,  and shall  perform such duties as from time to
time may be assigned to him or her by the Board of Directors.

         SECTION  4.  President.  The  President  shall be the  chief  executive
officer of the Corporation. Subject to the directions of the Board of Directors,
the President shall have and exercise  direct charge of and general  supervision
over the business and affairs of the  Corporation  and shall  perform all duties
incident to the office of the chief executive  officer of a corporation and such
other  duties as from time to time may be assigned to him or her by the Board of
Directors. The President may but need not be a member of the Board of Directors.

         SECTION  5.  Executive  Vice  Presidents  and  Vice  Presidents.   Each
Executive Vice President and Vice President  shall have and exercise such powers
and shall  perform such duties as from time to time may be assigned to him or to
her by the Board of Directors or the President.

         SECTION 6.  Secretary.  The  Secretary  shall  keep the  minutes of all
meetings of the stockholders and of the Board of Directors in books provided for
the purpose;  shall see that all notices are duly given in  accordance  with the
provisions of law and these  By-Laws;  the  Secretary

                                      -9-
<PAGE>

shall be  custodian  of the  records and of the  corporate  seal or seals of the
Corporation;  shall see that the corporate  seal is affixed to all documents the
execution  of  which,  on  behalf of the  Corporation  under  its seal,  is duly
authorized, and, when the seal is so affixed, he or she may attest the same; the
Secretary may sign,  with the  President,  an Executive Vice President or a Vice
President,  certificates  of stock of the  Corporation;  and,  in  general,  the
Secretary  shall  perform all duties  incident to the office of  secretary  of a
corporation,  and such other  duties as from time to time may be assigned to him
or her by the Board of Directors.

         SECTION 7. Assistant Secretaries. The Assistant Secretaries in order of
their seniority  shall,  in the absence or disability of the Secretary,  perform
the duties and exercise the powers of the Secretary and shall perform such other
duties as the Board of Directors  shall prescribe or as from time to time may be
assigned by the Secretary.

         SECTION  8.  Treasurer.  The  Treasurer  shall  have  charge  of and be
responsible  for  all  funds,  securities,  receipts  and  disbursements  of the
Corporation,  and shall  deposit,  or cause to be deposited,  in the name of the
Corporation, all monies or other valuable effects in such banks, trust companies
or other  depositaries as shall,  from time to time, be selected by the Board of
Directors; may endorse for collection on behalf of the Corporation checks, notes
and other  obligations;  may sign receipts and vouchers for payments made to the
Corporation; may sign checks of the Corporation,  singly or jointly with another
person as the Board of Directors may  authorize,  and pay out and dispose of the
proceeds  under the direction of the Board;  the  Treasurer  shall render to the
President and to the Board of Directors,  whenever requested,  an account of the
financial  condition  of the  Corporation;  the  Treasurer  may  sign,  with the
President,  or an Executive Vice President or a Vice President,  certificates of
stock of the Corporation;  and in general, shall perform all the duties incident
to the office of treasurer of a corporation,  and such other duties as from time
to time may be assigned by the Board of Directors. Unless the Board of Directors
shall otherwise determine, the Treasurer shall be the chief financial officer of
the Corporation.

         SECTION 9. Assistant  Treasurers.  The Assistant Treasurers in order of
their seniority  shall,  in the absence or disability of the Treasurer,  perform
the duties and exercise the powers of the Treasurer and shall perform such other
duties as the Board of Directors  shall prescribe or as from time to time may be
assigned by the Treasurer.

         SECTION 10. Controller.  The Controller, if elected, shall be the chief
accounting  officer of the  Corporation and shall perform all duties incident to
the  office  of a  controller  of a  corporation,  and,  in  the  absence  of or
disability of the Treasurer or any Assistant  Treasurer,  perform the duties and
exercise the powers of the  Treasurer and shall perform such other duties as the
Board of  Directors  shall  prescribe or as from time to time may be assigned by
the President or the Treasurer.

         SECTION 11. Assistant  Controllers.  The Assistant Controllers in order
of their  seniority  shall,  in the  absence or  disability  of the  Controller,
perform the duties and exercise the powers of the  Controller  and shall perform
such other duties as the Board of Directors  shall  prescribe or as from time to
time may be assigned by the Controller.

                                      -10-
<PAGE>

         SECTION 12.  Subordinate  Officers.  The Board of Directors may appoint
such subordinate officers as it may deem desirable. Each such officer shall hold
office for such period, have such authority and perform such duties as the Board
of  Directors  may  prescribe.  The Board of Directors  may,  from time to time,
authorize  any  officer  to  appoint  and  remove  subordinate  officers  and to
prescribe the powers and duties thereof.

         SECTION  13.  Compensation.  The  Board  of  Directors  shall  fix  the
compensation of all officers of the  Corporation.  It may authorize any officer,
upon whom the power of appointing  subordinate officers may have been conferred,
to fix the compensation of such subordinate officers.

         SECTION 14.  Removal.  Any officer of the  Corporation  may be removed,
with or without cause, by action of the Board of Directors.

         SECTION 15.  Bonds.  The Board of Directors  may require any officer of
the Corporation to give a bond to the Corporation, conditional upon the faithful
performance  of his or her duties,  with one or more sureties and in such amount
as may be satisfactory to the Board of Directors.

                                   ARTICLE VII

                              CERTIFICATES OF STOCK

         SECTION 1. Form and  Execution  of  Certificates.  The interest of each
stockholder  of  the  Corporation   shall  be  evidenced  by  a  certificate  or
certificates for shares of stock in such form as the Board of Directors may from
time to time  prescribe.  The  certificates  of  stock  of each  class  shall be
consecutively numbered and signed by the Chairman or Vice Chairman of the Board,
if any, the  President,  an Executive  Vice President or a Vice President and by
the Secretary,  an Assistant Secretary,  the Treasurer or an Assistant Treasurer
of the Corporation,  and may be  countersigned  and registered in such manner as
the Board of Directors may by resolution prescribe, and shall bear the corporate
seal or a printed or engraved facsimile  thereof.  Where any such certificate is
signed  by  a  transfer  agent  or  transfer  clerk  acting  on  behalf  of  the
Corporation,  the  signatures of any such Chairman,  Vice  Chairman,  President,
Executive  Vice  President,  Vice  President,  Treasurer,  Assistant  Treasurer,
Secretary or Assistant Secretary may be facsimiles, engraved or printed. In case
any officer or officers,  who shall have signed, or whose facsimile signature or
signatures shall have been used on, any such certificate or certificates,  shall
cease to be such officer or officers,  whether because of death,  resignation or
otherwise,  before such certificate or certificates shall have been delivered by
the Corporation, such certificate or certificates may nevertheless be issued and
delivered  by the  Corporation  as though the person or persons  who signed such
certificate or  certificates or whose  facsimile  signature or signatures  shall
have been used thereon had not ceased to be such officer or officers.

         In case the corporate seal which has been affixed to,  impressed on, or
reproduced in any such certificate or certificates shall cease to be the seal of
the Corporation  before such certificate or certificates  have been delivered by
the Corporation, such certificate or certificates may nevertheless be issued and
delivered  by the  Corporation  as though the seal  affixed  thereto,  impressed
thereon or reproduced therein had not ceased to be the seal of the Corporation.

                                      -11-
<PAGE>

         Every  certificate  for  shares  of  stock  which  are  subject  to any
restriction on transfer pursuant to law, the Certificate of Incorporation, these
By-Laws,  or any agreement to which the  Corporation is a party,  shall have the
restriction noted conspicuously on the certificate, and shall also set forth, on
the face or back,  either the full text of the restriction or a statement of the
existence of such restriction and (except if such restriction is imposed by law)
a statement  that the  Corporation  will furnish a copy thereof to the holder of
such certificate upon written request and without charge.

         Every  certificate  issued when the  Corporation is authorized to issue
more  than one  class or  series  of stock  shall  set forth on its face or back
either the full text of the  preferences,  voting  powers,  qualifications,  and
special and relative rights of the shares of each class and series authorized to
be  issued,  or a  statement  of the  existence  of  such  preferences,  powers,
qualifications  and rights,  and a statement that the Corporation will furnish a
copy thereof to the holder of such  certificate upon written request and without
charge.

         SECTION  2.  Transfer  of  Shares.  The  shares  of  the  stock  of the
Corporation  shall be transferred on the books of the  Corporation by the holder
thereof in person or by his or her attorney lawfully constituted, upon surrender
for  cancellation  of  certificates  for the  same  number  of  shares,  with an
assignment  and power of transfer  endorsed  thereon or attached  thereto,  duly
executed,  with such proof or guaranty of the  authenticity  of the signature as
the Corporation or its agents may reasonably  require.  The Corporation shall be
entitled  to treat  the  holder of record of any share or shares of stock as the
holder in fact  thereof  and  accordingly  shall not be bound to  recognize  any
equitable  or other  claim to or interest in such share or shares on the part of
any other person  whether or not it shall have express or other notice  thereof,
save as expressly  provided by law or by the  Certificate of  Incorporation.  It
shall be the duty of each  stockholder  to notify the  Corporation of his or her
post office address.

         SECTION 3. Closing of Transfer  Books.  The stock transfer books of the
Corporation may, if deemed appropriate by the Board of Directors,  be closed for
such length of time not  exceeding  fifty (50) days as the Board may  determine,
preceding the date of any meeting of stockholders or the date for the payment of
any  dividend  or the date for the  allotment  of  rights  or the date  when any
issuance,  change, conversion or exchange of capital stock shall go into effect,
during  which time no transfer of stock on the books of the  Corporation  may be
made.

         SECTION 4. Fixing Date for  Determination of Stockholders of Record. In
order that the Corporation may determine the stockholders  entitled to notice of
or to vote at any meeting of  stockholders  or any  adjournment  thereof,  or to
express consent to corporate action in writing without a meeting, or entitled to
receive  payment of any  dividend  or other  distribution  or  allotment  of any
rights, or entitled to exercise any rights in respect of any change,  conversion
or exchange of stock or for the purpose of any other lawful action, the Board of
Directors  may fix a record  date,  which record date shall not precede the date
upon which the  resolution  fixing  the  record  date is adopted by the Board of
directors  and  which  record  date:  (a)  in  the  case  of   determination  of
stockholders  entitled to vote at any  meeting of  stockholders  or  adjournment
thereof,   shall,   unless  otherwise   required  by  law,  the  Certificate  of
Incorporation  or otherwise,  not be more than sixty (60) nor less than ten (10)
days  before  the  date of such  meeting;  (b) in the case of  determination  of
stockholders  entitled to express consent to corporate action in writing without
a  meeting,  shall,  unless  otherwise  required  by  law,  the  Certificate  of
Incorporation  or  otherwise,  not be more than ten (10) days from the date upon
which  the  resolution  fixing  the

                                      -12-
<PAGE>

record  date is  adopted by the Board of  Directors;  and (c) in the case of any
other action, shall not be more than sixty (60) days prior to such other action.
If no record  date is fixed:  (a) the record date for  determining  stockholders
entitled  to notice of or to vote at a meeting of  stockholders  shall be at the
close of business on the day next  preceding  the day on which  notice is given,
or, if notice is waived,  at the close of business on the day next preceding the
day on  which  the  meeting  is  held;  (b)  the  record  date  for  determining
stockholders  entitled to express consent to corporate action in writing without
a meeting  when no prior  action of the Board of  Directors  is required by law,
shall be the first  date on which a signed  written  consent  setting  forth the
action  taken or  proposed  to be  taken  is  delivered  to the  Corporation  in
accordance with applicable law, or, if prior action by the Board of Directors is
required by law, shall be at the close of business on the day on which the Board
of Directors adopts the resolution taking such prior action;  and (c) the record
date for determining stockholders for any other purpose shall be at the close of
business  on the day on which  the  Board of  Directors  adopts  the  resolution
relating  thereto.  A determination of stockholders of record entitled to notice
of or to vote at a meeting of stockholders shall apply to any adjournment of the
meeting;  provided,  however,  that the Board of Directors  may fix a new record
date for the adjourned meeting.

         SECTION  5.  Lost or  Destroyed  Certificates.  In case of the  loss or
destruction of any  certificate of stock, a new  certificate may be issued under
the following conditions:

         (a)      The owner of said certificate shall file with the Secretary or
                  any Assistant Secretary of the Corporation an affidavit giving
                  the facts in relation to the ownership, and in relation to the
                  loss or  destruction of said  certificate,  stating its number
                  and the number of shares represented  thereby;  such affidavit
                  shall be in such form and  contain  such  statements  as shall
                  satisfy the  President,  any Executive  Vice  President,  Vice
                  President,   the  Secretary,   any  Assistant  Secretary,  the
                  Treasurer or any Assistant  Treasurer,  that said  certificate
                  has  been  accidentally  destroyed  or  lost,  and  that a new
                  certificate ought to be issued in lieu thereof.  Upon being so
                  satisfied,  any such officer may require such owner to furnish
                  the  Corporation  a bond in such penal sum and in such form as
                  he or she may deem  advisable,  and with a surety or  sureties
                  approved by him or her, to  indemnify  and save  harmless  the
                  Corporation  from any claim,  loss,  damage or liability which
                  may be occasioned by the issuance of a new certificate in lieu
                  thereof.  Upon such bond being so filed, if so required, a new
                  certificate  for the same number of shares  shall be issued to
                  the owner of the  certificate  so lost or  destroyed;  and the
                  transfer  agent  and   registrar,   if  any,  of  stock  shall
                  countersign and register such new certificate  upon receipt of
                  a written order signed by any such officer,  and thereupon the
                  Corporation   will  save  harmless  said  transfer  agent  and
                  registrar  in the  premises.  In case of the  surrender of the
                  original  certificate,  in lieu of which a new certificate has
                  been issued,  or the  surrender of such new  certificate,  for
                  cancellation,  the bond of  indemnity  given as a condition of
                  the issue of such new certificate may be surrendered; or

         (b)      The Board of Directors of the  Corporation  may by  resolution
                  authorize and direct any transfer  agent or registrar of stock
                  of the  Corporation  to issue and register  respectively  from
                  time to time  without  further  action  or  approval  by or on
                  behalf of the Corporation new certificates of stock to replace
                  certificates  reported lost,

                                      -13-
<PAGE>

                  stolen or  destroyed  upon receipt of an affidavit of loss and
                  bond  of   indemnity  in  form  and  amount  and  with  surety
                  satisfactory  to such  transfer  agent  or  registrar  in each
                  instance  or upon such  terms and  conditions  as the Board of
                  Directors may determine.

         SECTION  6.  Uncertificated  Shares.  The  Board  of  Directors  of the
Corporation may by resolution  provide that one or more of any or all classes or
series of the stock of the Corporation shall be uncertificated  shares,  subject
to the provisions of Section 158 of the Delaware General Corporation Law.

                                  ARTICLE VIII

                             EXECUTION OF DOCUMENTS

         SECTION 1.  Execution of Checks,  Notes,  etc. All checks and drafts on
the Corporation's  bank accounts and all bills of exchange and promissory notes,
and all acceptances, obligations and other instruments for the payment of money,
shall be signed by such  officer or  officers,  or agent or agents,  as shall be
thereunto  authorized from time to time by the Board of Directors,  which may in
its discretion authorize any such signatures to be facsimile.

         SECTION 2. Execution of Contracts,  Assignments,  etc. Unless the Board
of Directors shall have otherwise  provided generally or in a specific instance,
all contracts, agreements,  endorsements,  assignments, transfers, stock powers,
or other  instruments  shall be  signed by the  President,  any  Executive  Vice
President,  any Vice  President,  the Secretary,  any Assistant  Secretary,  the
Treasurer or any Assistant  Treasurer.  The Board of Directors may, however,  in
its discretion,  require any or all such  instruments to be signed by any two or
more of such officers, or may permit any or all of such instruments to be signed
by such other  officer or  officers,  agent or agents,  as it shall be thereunto
authorize from time to time.

         SECTION 3.  Execution of Proxies.  The  President,  any Executive  Vice
President or any Vice President, and the Secretary, the Treasurer, any Assistant
Secretary or any Assistant  Treasurer,  or any other  officer  designated by the
Board of Directors,  may sign on behalf of the Corporation  proxies to vote upon
shares of stock of other companies standing in the name of the Corporation.

                                   ARTICLE IX

                               INSPECTION OF BOOKS

         The Board of Directors shall  determine from time to time whether,  and
if allowed, to what extent and at what time and places and under what conditions
and regulations,  the accounts and books of the Corporation  (except such as may
by law be specifically  open to inspection) or any of them, shall be open to the
inspection  of the  stockholders,  and no  stockholder  shall  have any right to
inspect any account or book or document of the Corporation,  except as conferred
by the laws of the State of Delaware,  unless and until  authorized  so to do by
resolution of the Board of Directors or of the stockholders of the Corporation.


                                      -14-
<PAGE>


                                    ARTICLE X

                                   FISCAL YEAR

         The fiscal year of the  Corporation  shall be  determined  from time to
time by vote of the Board of Directors.

                                   ARTICLE XI

                                   AMENDMENTS

         These  By-Laws may be  altered,  amended,  changed or repealed  and new
By-Laws  adopted  by  the  stockholders  or,  to  the  extent  provided  in  the
Certificate of Incorporation,  by the Board of Directors,  in either case at any
meeting called for that purpose at which a quorum shall be present.  Any by-law,
whether made, altered,  amended,  changed or repealed by the stockholders or the
Board of Directors may be repealed,  amended, changed, further amended, changed,
repealed or reinstated, as the case may be, either by the stockholders or by the
Board of Directors, as herein provided; except that this Article may be altered,
amended, changed or repealed only by vote of the stockholders.

                                   ARTICLE XII

                                 INDEMNIFICATION

         SECTION 1.  Indemnification.  (a) The  Corporation  shall indemnify and
hold harmless, to the fullest extent permitted by applicable law as it presently
exists or may  hereafter  be  amended,  any  person  who was or is a party or is
threatened  to be made a  party  or is  otherwise  involved  in 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) by reason of the fact that he, or a person for whom he is the legal
representative,  is or  was a  director,  officer,  employee  or  agent  of  the
Corporation,  or is or was  serving  at the  request  of  the  Corporation  as a
director,  officer,  partner,  member,  trustee,  employee  or agent of  another
corporation,  partnership,  joint venture,  limited liability company,  trust or
other enterprise or non-profit  entity against all liability,  losses,  expenses
(including  attorneys' fees),  judgments,  fines, and amounts paid in settlement
actually and reasonably  incurred by him in connection with such action, suit or
proceeding if he acted in good faith and in a manner he  reasonably  believed to
be in or not opposed to the best interest of the Corporation,  and, with respect
to any criminal  action or  proceeding,  had no reasonable  cause to believe his
conduct was  unlawful.  The  termination  of any action,  suit or  proceeding by
judgment,  order, settlement,  conviction,  or upon a plea of nolo contendere or
its equivalent,  shall not, of itself,  create a presumption that the person did
not act in good faith and in a manner which he  reasonably  believed to be in or
not opposed to the best  interest of the  Corporation,  and, with respect to any
criminal action or proceeding,  had reasonable cause to believe that his conduct
was unlawful.

         (b) The Corporation shall indemnify any person who was or is a party or
is threatened to be made a party to any threatened,  pending or completed action
or suit by or in the right of the Corporation to procure a judgment in its favor
by reason of the fact that he is or was a director,  officer,  employee or agent
of the Corporation,  or is or was serving at the request of the

                                      -15-
<PAGE>

Corporation as a director,  officer, partner, member, trustee, employee or agent
of another corporation,  partnership,  joint venture, limited liability company,
trust or other  enterprise  or non-profit  entity  against  expenses  (including
attorneys' fees) actually and reasonably  incurred by him in connection with the
defense or  settlement of such action or suit if he acted in good faith and in a
manner he reasonably  believed to be in or not opposed to the best  interests of
the Corporation;  except that no indemnification shall be made in respect of any
claim,  issue or matter as to which such person  shall have been  adjudged to be
liable  for  negligence  or  misconduct  in the  performance  of his duty to the
Corporation  unless and only to the  extent  that the Court of  Chancery  of the
State of Delaware  or the court in which such  action or suit was brought  shall
determine upon  application  that despite the  adjudication  of liability but in
view of all the  circumstances of the case, such person is fairly and reasonably
entitled to indemnity for such expenses which the Court of Chancery of the State
of Delaware or such other court shall deem proper.

         (c) To the extent that any person  referred to in paragraphs (a) or (b)
has been successful on the merits or otherwise in defense of any action, suit or
proceeding  referred  to  therein,  or in defense of any claim,  issue or matter
therein, he or she shall be indemnified  against expenses (including  attorneys'
fees) actually and reasonably incurred by him or her in connection therewith.

         SECTION 2. Authorization.  Any indemnification  under Section 1 of this
Article  (unless  ordered by a court) shall be made by the  Corporation  only as
authorized in the specific case upon a determination that indemnification of the
director,  officer, partner, member, trustee, employee or agent is proper in the
circumstances because such person has met the applicable standard of conduct set
forth in Section 1 of this Article. Such determination shall be made: (a) by the
Board of Directors by a majority  vote of a quorum  consisting  of directors who
were not parties to such action, suit or proceeding,  or (b) if such a quorum is
not obtainable,  or, even if obtainable,  a quorum of disinterested directors so
directs,  by  independent  legal  counsel  in  written  opinion,  or  (c) by the
stockholders.

         SECTION  3.  Expense  Advance.  Expenses  (including  attorneys'  fees)
incurred by an officer or director of the  Corporation  in defending  any civil,
criminal, administrative or investigative action, suit or proceeding may be paid
by the Corporation in advance of the final  disposition of such action,  suit or
proceeding  as  authorized  by the Board of Directors in the manner  provided in
Section 2 of this Article upon receipt of an undertaking by or on behalf of such
officer  or  director  to repay  such  amount,  unless  it shall  ultimately  be
determined  that such person is entitled to be indemnified by the Corporation as
authorized in this Article.  Such expenses (including  attorneys' fees) incurred
by other  employees or agents of the  Corporation may be so paid upon such terms
and conditions, if any, as the Board of Directors deems appropriate.

         SECTION 4.  Nonexclusivity.  The  indemnification  and  advancement  of
expenses provided by, or granted pursuant to, the other Sections of this Article
shall  not be  deemed  exclusive  of any other  rights  to which  those  seeking
indemnification  or  advancement  of expenses may be entitled under any statute,
by-law, agreement, vote of stockholders or disinterested directors or otherwise,
both as to action in an official  capacity and as to action in another  capacity
while holding such office,  and shall  continue as to a person who has ceased to
be a

                                      -16-
<PAGE>

director,  officer,  partner, member, trustee, employee or agent and shall inure
to the benefit of the heirs, executors and administrators of such a person.

         SECTION 5. Insurance.  The Corporation shall have power to purchase and
maintain  insurance  on behalf of any person who is or was a director,  officer,
employee or agent of the Corporation, or is or was serving at the request of the
Corporation as a director,  officer, partner, member, trustee, employee or agent
of another corporation,  partnership,  joint venture, limited liability company,
trust or other  enterprise or non-profit  entity against any liability  asserted
against and incurred by him or her in any such  capacity,  or arising out of his
or her status as such,  whether or not the  Corporation  would have the power to
indemnify  such person  against  such  liability  under the  provisions  of this
Article or Section 145 of the Delaware General Corporation Law.

         SECTION  6.  "The  Corporation".  For the  purposes  of  this  Article,
references to "the Corporation" shall include the resulting  corporation and, to
the extent that the Board of Directors of the resulting  corporation so decides,
all  constituent  corporations  (including  any  constituent  of a  constituent)
absorbed in a  consolidation  or merger  which,  if its separate  existence  had
continued,  would  have had power and  authority  to  indemnify  its  directors,
officers  and  employees  or agents so that any person who is or was a director,
officer,  employee  or  agent  of such a  constituent  corporation  or is or was
serving at the request of such  constituent  corporation  as director,  officer,
partner, member, trustee, employee or agent of another corporation, partnership,
joint  venture,   limited  liability  company,  trust  or  other  enterprise  or
non-profit  entity shall stand in the same position under the provisions of this
Article with respect to the resulting or surviving  corporation  if its separate
existence had continued.

         SECTION 7. Other Indemnification. The Corporation's obligation, if any,
to  indemnify  any person who was or is  serving at its  request as a  director,
trustee,   partner,   officer,   employee  or  agent  of  another   corporation,
partnership, joint venture, trust or other enterprise or non-profit entity shall
be reduced by any amount such person may  collect as  indemnification  from such
other  corporation,  partnership,  joint venture,  trust or other  enterprise or
non-profit entity or from insurance.

         SECTION 8. Other Definitions.  For purposes of this Article, references
to "other  enterprises"  shall include  employee  benefit  plans;  references to
"fines" shall  include any excise taxes  assessed on a person with respect to an
employee  benefit  plan;  and  references  to  "serving  at the  request  of the
Corporation" shall include any service as a director, trustee, officer, employee
or agent of the  Corporation  which imposes duties on, or involves  services by,
such director,  trustee, officer, employee, or agent with respect to an employee
benefit plan, its participants, or beneficiaries; and a person who acted in good
faith and in a manner he or she reasonably believed to be in the interest of the
participants  and  beneficiaries  of an employee benefit plan shall be deemed to
have acted in a manner "not opposed to the best interests of the Corporation" as
referred to in this Article.

         SECTION 9. Continuation of  Indemnification.  The  indemnification  and
advancement of expenses provided by, or granted pursuant to, this Article shall,
unless otherwise  provided when authorized or ratified,  continue as to a person
who has ceased to be a director,  trustee,  partner,  officer, employee or agent
and shall inure to the benefit of the heirs,  executors  and  administrators  of
such a person.

                                      -17-
<PAGE>

         SECTION 10.  Amendment or Repeal.  Neither the  amendment nor repeal of
this Article nor the adoption of any  provision  of these  By-Laws  inconsistent
with this Article  shall  reduce,  eliminate  or  adversely  affect any right or
protection  hereunder of any person in respect of any act or omission  occurring
prior to the effectiveness of such amendment, repeal or adoption.



                                      -18-

                                                                     EXHIBIT 4.1













                           AMERICAN TOWER CORPORATION

                                       TO

                         ...............................
                                 --------------


                                    Indenture

                      Dated as of ..................., 2000


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


<PAGE>


<TABLE>
<CAPTION>
                                                  Table of Contents

                                                                                                               Page


<S>                                                                                                              <C>
ARTICLE One                Definitions and Other Provisions.......................................................1
         Section 101       Definitions............................................................................1
         Section 102       Compliance Certificates and Opinions..................................................12
         Section 103       Form of Documents Delivered to Trustee................................................12
         Section 104       Acts of Holders; Record Dates.........................................................13
         Section 105       Notices, Etc., to Trustee and Company.................................................15
         Section 106       Notice to Holders; Waiver.............................................................15
         Section 107       Conflict with Trust Indenture Act.....................................................15
         Section 108       Effect of Headings and Table of Contents..............................................16
         Section 109       Successors and Assigns................................................................16
         Section 110       Separability Clause...................................................................16
         Section 111       Benefits of Indenture.................................................................16
         Section 112       Governing Law.........................................................................16
         Section 113       Legal Holidays........................................................................16

ARTICLE Two                Security Forms........................................................................17
         Section 201       Forms Generally.......................................................................17
         Section 202       Form of Face of Security..............................................................17
         Section 203       Form of Reverse of Security...........................................................19
         Section 204       Form of Legend for Global Securities..................................................23
         Section 205       Form of Trustee's Certificate of Authentication.......................................23

ARTICLE Three              The Securities........................................................................24
         Section 301       Amount Unlimited; Issuable in Series..................................................24
         Section 302       Denominations.........................................................................26
         Section 303       Execution, Authentication, Delivery and Dating........................................27
         Section 304       Temporary Securities..................................................................28
         Section 305       Registration, Registration of Transfer and Exchange...................................29
         Section 306       Mutilated, Destroyed, Lost and Stolen Securities......................................30
         Section 307       Payment of Interest; Interest Rights Preserved........................................31
         Section 308       Persons Deemed Owners.................................................................32
         Section 309       Cancellation..........................................................................32
         Section 310       Computation of Interest...............................................................33

ARTICLE Four               Satisfaction and Discharge............................................................33
         Section 401       Satisfaction and Discharge of Indenture...............................................33
         Section 402       Application of Trust Money............................................................34

ARTICLE Five               Remedies..............................................................................34
         Section 501       Events of Default.....................................................................34
         Section 502       Acceleration of Maturity; Rescission and Annulment....................................36
         Section 503       Collection of Indebtedness and Suits for Enforcement by Trustee.......................37
         Section 504       Trustee May File Proofs of Claim......................................................37

                                                          i
<PAGE>

<CAPTION>
                                                  Table of Contents
                                                     (continued)
                                                                                                               Page

<S>                                                                                                              <C>
         Section 505       Trustee May Enforce Claims Without Possession of Securities...........................38
         Section 506       Application of Money Collected........................................................38
         Section 507       Limitation on Suits...................................................................39
         Section 508       Unconditional Right of Holders to Receive Principal,
                           Premium and Interest..................................................................39
         Section 509       Restoration of Rights and Remedies....................................................39
         Section 510       Rights and Remedies Cumulative........................................................40
         Section 511       Delay or Omission Not Waiver..........................................................40
         Section 512       Control by Holders....................................................................40
         Section 513       Waiver of Past Defaults...............................................................40
         Section 514       Undertaking for Costs.................................................................41
         Section 515       Waiver of Usury, Stay or Extension Laws...............................................41

ARTICLE Six                The Trustee...........................................................................41
         Section 601       Certain Duties and Responsibilities...................................................41
         Section 602       Notice of Defaults....................................................................42
         Section 603       Certain Rights of Trustee.............................................................42
         Section 604       Not Responsible for Recitals or Issuance of Securities................................43
         Section 605       May Hold Securities...................................................................43
         Section 606       Money Held in Trust...................................................................43
         Section 607       Compensation and Reimbursement........................................................43
         Section 608       Conflicting Interests.................................................................44
         Section 609       Corporate Trustee Required; Eligibility...............................................44
         Section 610       Resignation and Removal; Appointment of Successor.....................................44
         Section 611       Acceptance of Appointment by Successor................................................46
         Section 612       Merger, Conversion, Consolidation or Succession to Business...........................47
         Section 613       Preferential Collection of Claims Against Company.....................................47
         Section 614       Appointment of Authenticating Agent...................................................47

ARTICLE Seven              Holders' Lists and Reports by Trustee and Company.....................................49
         Section 701       Company to Furnish Trustee Names and Addresses of Holders.............................49
         Section 702       Preservation of Information; Communications to Holders................................49
         Section 703       Reports by Trustee....................................................................50
         Section 704       Reports by Company....................................................................50

ARTICLE Eight              Consolidation, Merger, Conveyance, Transfer or
                           Lease.................................................................................50
         Section 801       Company May Consolidate, Etc., Only on Certain Terms..................................50
         Section 802       Successor Substituted.................................................................51

ARTICLE Nine               Supplemental Indentures...............................................................51
         Section 901       Supplemental Indentures Without Consent of Holders....................................51
         Section 902       Supplemental Indentures With Consent of Holders.......................................53
         Section 903       Execution of Supplemental Indentures..................................................54

                                                         ii
<PAGE>

<CAPTION>
                                                  Table of Contents
                                                     (continued)
                                                                                                               Page

<S>                                                                                                              <C>
         Section 904       Effect of Supplemental Indentures.....................................................54
         Section 905       Conformity with Trust Indenture Act...................................................54
         Section 906       Reference in Securities to Supplemental Indentures....................................54

ARTICLE Ten                Covenants.............................................................................54
         Section 1001      Payment of Principal, Premium and Interest............................................54
         Section 1002      Maintenance of Office or Agency.......................................................55
         Section 1003      Money for Securities Payments to Be Held in Trust.....................................55
         Section 1004      Statement by Officers as to Default...................................................56
         Section 1005      Existence.............................................................................56
         Section 1006      Maintenance of Properties.............................................................57
         Section 1007      Payment of Taxes and Other Claims.....................................................57
         Section 1008      Maintenance of Insurance..............................................................57
         Section 1009      Waiver of Certain Covenants...........................................................57

ARTICLE Eleven             Redemption of Securities..............................................................58
         Section 1101      Applicability of Article..............................................................58
         Section 1102      Election to Redeem; Notice to Trustee.................................................58
         Section 1103      Selection by Trustee of Securities to Be Redeemed.....................................58
         Section 1104      Notice of Redemption..................................................................59
         Section 1105      Deposit of Redemption Price...........................................................60
         Section 1106      Securities Payable on Redemption Date.................................................60
         Section 1107      Securities Redeemed in Part...........................................................60

ARTICLE Twelve             Sinking Funds.........................................................................61
         Section 1201      Applicability of Article..............................................................61
         Section 1202      Satisfaction of Sinking Fund Payments with Securities.................................61
         Section 1203      Redemption of Securities for Sinking Fund.............................................61

ARTICLE Thirteen  Defeasance and Covenant Defeasance.............................................................62
         Section 1301      Company's Option to Effect Defeasance or Covenant Defeasance..........................62
         Section 1302      Defeasance and Discharge..............................................................62
         Section 1303      Covenant Defeasance...................................................................62
         Section 1304      Conditions to Defeasance or Covenant Defeasance.......................................63
         Section 1305      Deposited Money and U.S. Government Obligations to Be Held
                           in Trust; Miscellaneous Provisions....................................................65
         Section 1306      Reinstatement.........................................................................66

ARTICLE Fourteen  Subordination of Securities....................................................................66
         Section 1401      Securities Subordinate to Senior Debt.................................................66
         Section 1402      Payment Over of Proceeds Upon Dissolution, Etc........................................66
         Section 1403      No Payment When Senior Debt in Default................................................67
         Section 1404      Payment Permitted If No Default.......................................................69
         Section 1405      Subrogation to Rights of Holders of Senior Debt.......................................69

                                                         iii
<PAGE>

<CAPTION>
                                                  Table of Contents
                                                     (continued)
                                                                                                               Page

<S>                                                                                                              <C>
         Section 1406      Provisions Solely to Define Relative Rights...........................................69
         Section 1407      Trustee to Effectuate Subordination...................................................70
         Section 1408      No Waiver of Subordination Provisions.................................................70
         Section 1409      Notice to Trustee.....................................................................70
         Section 1410      Reliance on Judicial Order or Certificate of Liquidating Agent........................71
         Section 1411      Trustee Not Fiduciary for Holders of Senior Debt......................................71
         Section 1412      Rights of Trustee as Holder of Senior Debt; Preservation of
                           Trustee's Rights......................................................................71
         Section 1413      Article Applicable to Paying Agents...................................................72
         Section 1414      Defeasance of this Article Fourteen...................................................72
</TABLE>



                                                         iv
<PAGE>






    Certain Sections of this Indenture relating to Sections 310 through 318,
                 inclusive, of the Trust Indenture Act of 1939:

Trust Indenture
  Act Section                                                  Indenture Section

ss.310(a)(1)..............................................................609
      (a)(2)..............................................................609
      (a)(3)...................................................Not Applicable
      (a)(4)...................................................Not Applicable
      (b).................................................................608
ss.311(a).................................................................613
      (b).................................................................613
ss.312(a).................................................................701
      (b).................................................................702
      (c).................................................................702
ss.313(a).................................................................703
      (b).................................................................703
      (c).................................................................703
      (d).................................................................703
ss.314(a).................................................................704
      (a)(4)..............................................................101
      (b)......................................................Not Applicable
      (c)(1)..............................................................102
      (c)(2)..............................................................102
      (c)(3)...................................................Not Applicable
      (d)......................................................Not Applicable
      (e).................................................................102
ss.315(a).................................................................601
      (b).................................................................602
      (c).................................................................601
      (d).................................................................601
      (e).................................................................514
ss.316(a).................................................................101
      (a)(1)(A)...........................................................502
      (a)(1)(B)...........................................................513
      (a)(2)...................................................Not Applicable
      (b).................................................................508
      (c).................................................................104
ss.317(a)(1)..............................................................503
      (a)(2)..............................................................504
      (b).................................................................508
      (c).................................................................104
ss.317(a)(1)..............................................................503
      (a)(2)..............................................................504
      (b)................................................................1003
ss.318(a).................................................................107

- ----------------------
NOTE: This  reconciliation  and tie shall not, for any purpose,  be deemed to be
part of the Indenture.


<PAGE>


         INDENTURE,  dated as of  ................,  2000 between American Tower
Corporation,  a corporation  duly  organized and existing  under the laws of the
State  of  Delaware  corporation  (herein  called  the  "Company"),  having  its
principal  office at 116 Huntington  Avenue,  Boston,  Massachusetts  02116, and
 .............................., a ........................... duly organized and
existing under the laws of ........, as Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

         The Company has duly  authorized  the  execution  and  delivery of this
Indenture  to  provide  for the  issuance  from  time  to time of its  unsecured
debentures,  notes  or  other  evidences  of  indebtedness  (herein  called  the
"Securities"), to be issued in one or more series as in this Indenture provided.

         All things  necessary to make this  Indenture a valid  agreement of the
Company, in accordance with its terms, have been done.

         Now, Therefore, This Indenture Witnesseth:

         For  and in  consideration  of the  premises  and the  purchase  of the
Securities  by the Holders  thereof,  it is mutually  agreed,  for the equal and
proportionate  benefit of all Holders of the Securities or of series thereof, as
follows:

                                  ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

         Section 101 Definitions.

                  For  all  purposes  of this  Indenture,  except  as  otherwise
expressly provided or unless the context otherwise requires:

                  (a) the  terms  defined  in this  Article  have  the  meanings
         assigned to them in this  Article and include the plural as well as the
         singular;

                  (b) all other terms used herein which are defined in the Trust
         Indenture  Act,  either  directly  or by  reference  therein,  have the
         meanings assigned to them therein;

                  (c) all accounting terms not otherwise defined herein have the
         meanings  assigned  to  them  in  accordance  with  generally  accepted
         accounting  principles,  and,  except  as  otherwise  herein  expressly
         provided,  the term "generally  accepted  accounting  principles"  with
         respect to any computation  required or permitted  hereunder shall mean
         such accounting principles as are generally accepted at the Issue Date;

                  (d)  unless  otherwise  specifically  set  forth  herein,  all
         calculations or  determinations  of a Person shall be performed or made
         on  a  consolidated   basis  in  accordance  with  generally   accepted
         accounting principles;


<PAGE>

                  (e) unless the context otherwise requires, any reference to an
         "Article" or a "Section" refers to an Article or a Section, as the case
         may be, of this Indenture; and

                  (f) the words  "herein",  "hereof" and  "hereunder"  and other
         words of similar  import refer to this  Indenture as a whole and not to
         any particular Article, Section or other subdivision.

         Certain  terms,  used  principally  in Article  14, are defined in that
Article.

         "Act", when used with respect to any Holder,  has the meaning specified
in Section 104.

         "Affiliate" of any specified  Person means any other Person directly or
indirectly  controlling  or  controlled  by or under  direct or indirect  common
control  with  such  specified  Person.  For the  purposes  of this  definition,
"control"  when used with  respect to any  specified  Person  means the power to
direct the  management  and  policies of such  Person,  directly or  indirectly,
whether  through the ownership of voting  securities,  by contract or otherwise;
and the terms  "controlling" and "controlled"  have meanings  correlative to the
foregoing.

         "ATC"  means  ATC  Teleports,   Inc.,  a  Delaware  corporation  and  a
Subsidiary of the Company.

         "ATI"  means  American  Towers,  Inc.,  a  Delaware  corporation  and a
Subsidiary of the Company.

         "ATLP" means American Tower, L.P., a Delaware limited partnership and a
Subsidiary of the Company.

         "Authenticating  Agent"  means any  Person  authorized  by the  Trustee
pursuant  to  Section  614 to act on  behalf  of  the  Trustee  to  authenticate
Securities of one or more series.

         "Bankruptcy  Code" means Title 11,  United  States  Bankruptcy  Code of
1978, as amended,  or any similar United States federal or state law relating to
bankruptcy, insolvency, receivership, winding-up, liquidation, reorganization or
relief of debtors or any amendment to, succession to or change in any such law.

         "blockage period" has the meaning specified in Section 1203.

         "Board of Directors" means either the board of directors of the Company
or any duly authorized committee of that board.

         "Board  Resolution"  means  a copy  of a  resolution  certified  by the
Secretary or an Assistant  Secretary of the Company to have been duly adopted by
the Board of  Directors  and to be in full  force and effect on the date of such
certification, and delivered to the Trustee.



                                      -2-
<PAGE>

         "Business Day",  when used with respect to any Place of Payment,  means
each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which
banking institutions in that Place of Payment are authorized or obligated by law
or executive order to close.

         "Capital Lease Obligation" means, at any time any determination thereof
is to be made,  the amount of the  liability in respect of a capital  lease that
would  at such  time be  required  to be  capitalized  on the  balance  sheet in
accordance with GAAP.

         "Capital Stock" means (i) in the case of a corporation,  capital stock,
(ii) in the case of any  association  or  business  entity,  any and all shares,
interests,  participations,  rights or other equivalents (however designated) or
capital  stock and  (iii) in the case of a  partnership,  partnership  interests
(whether  general or  limited)  and any other  interest  or  participation  that
confers on a Person the right to receive a share of the  profits  and losses of,
or distributions of assets of, such partnership.

         "Cash  Equivalents"  means (i) United States  dollars,  (ii) securities
issued  or  directly  and fully  guaranteed  or  insured  by the  United  States
government or any agency or  instrumentality  thereof having  maturities of less
than one year from the date of  acquisition,  (iii)  certificates of deposit and
eurodollar  time deposits with maturities of less than one year from the date of
acquisition,  bankers'  acceptances  with  maturities  of less than one year and
overnight  bank  deposits,  in each case  with any  lender  party to the  Credit
Agreement or with any  domestic  commercial  bank having  capital and surplus in
excess of  $500,000,000  and a Keefe  Bank Watch  Rating of "B" or better,  (iv)
repurchase  obligations  with a term of not more than seven days for  underlying
securities  of the types  described in clauses (ii) and (iii)  entered into with
any financial  institution meeting the qualifications  specified in clause (iii)
above and (v) commercial paper having the highest rating obtainable from Moody's
Investors Service, Inc. or Standard & Poor's Ratings Services, a division of the
McGraw-Hill Companies,  Inc., and in each case maturing within nine months after
the date of acquisition.

         "Change of Control" means the occurrence of any of the following:

                           (i) the sale,  lease or transfer,  in one or a series
                  of related  transactions,  of all or substantially  all of the
                  Company's  assets to any Person or group (as such term is used
                  in Section  13(d)(3)  of the  Exchange  Act)  (other  than the
                  Principal Shareholders or their Related Parties),

                           (ii)  the   adoption  of  a  plan   relating  to  the
                  liquidation or dissolution of the Company,

                           (iii) the acquisition, directly or indirectly, by any
                  Person or group (as such term is used in Section  13(d)(3)  of
                  the  Exchange  Act) (other  than one or more of the  Principal
                  Shareholders  and their Related Parties) of 50% or more of the
                  voting  power of the  voting  stock of the  Company  by way of
                  merger  or  consolidation  or  otherwise,  provided  that such
                  acquisition  will not constitute a "Change of Control"  unless
                  or until such  Person or group owns,  directly or


                                      -3-
<PAGE>

                  indirectly,  more of the voting  power of the voting  stock of
                  the Company than the Principal  Shareholders and their Related
                  Parties, or

                           (iv) the Continuing Directors cease for any reason to
                  constitute a majority of the  directors of the Company then in
                  office.

For purposes of this definition, any transfer of an Equity Interest of an entity
that was formed for the purpose of acquiring  voting stock of the Company  shall
be deemed to be a transfer of such portion of such voting  stock as  corresponds
to the portion of the equity of such entity that has been so transferred.

         "Commission" means the Securities and Exchange Commission, from time to
time  constituted,  created under the Exchange Act, or, if at any time after the
execution of this  instrument such Commission is not existing and performing the
duties  now  assigned  to it  under  the  Trust  Indenture  Act,  then  the body
performing such duties at such time.

         "Common  Stock" of any Person means  Capital  Stock of such Person that
does not rank prior, as to the payment of dividends or as to the distribution of
assets upon any voluntary or involuntary liquidation,  dissolution or winding up
of such Person, to shares of Capital Stock of any other class of such Person.

         "Company"  means  the  Person  named  as the  "Company"  in  the  first
paragraph  of this  instrument  until a successor  Person shall have become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Company" shall mean such successor Person.

         "Company  Request" or "Company  Order" means a written request or order
signed  in the  name of the  Company  by its  Chairman  of the  Board,  its Vice
Chairman of the Board, its Chief Executive Officer, its Chief Operating Officer,
its Chief Financial  Officer,  its President or a Vice President,  and,  without
duplication,  by its  Treasurer,  an Assistant  Treasurer,  its  Secretary or an
Assistant Secretary, and delivered to the Trustee.

         "Corporate  Trust Office" means the principal  office of the Trustee in
 ................................................................ at which at any
particular time its corporate trust business shall be administered.

         "corporation" means a corporation,  association,  company,  joint-stock
company or business trust.

         "Covenant Defeasance" has the meaning specified in Section 1303.

         "Credit Agreement" means Amended and Restated Loan Agreement,  dated as
of January 6, 2000,  among ATC, ATI, ATLP,  Toronto Dominion  (Texas),  Inc., as
administrative  agent, The  Toronto-Dominion  Bank, New York Branch,  as Issuing
Bank, TD Securities (USA) Inc. and Chase  Securities Inc., as Co-Lead  Arrangers
and  Co-Book  Managers,  The Bank of New  York and  Chase  Securities  Inc.,  as
Co-Syndication  Agents,  Credit Suisse First Boston, as Documentation Agent, and
the financial  institutions defined as "Lenders" therein, as heretofore


                                      -4-
<PAGE>

amended,  including (i) any related notes,  guarantees  (including guarantees by
the  Company   and/or  the  Company's   Subsidiaries),   collateral   documents,
instruments and agreements executed in connection therewith, and in each case as
amended, modified,  renewed, refunded, replaced or refinanced from time to time,
and  (ii)  any  notes,   guarantees   (including  guarantees  by  the  Company's
Subsidiaries),  collateral  documents,  instruments  and agreements  executed in
connection  with  any  such   amendment,   modification,   renewal,   refunding,
replacement or refinancing.

         "Default" means any event that is, or after the giving of notice or the
passage of time or both would be, an Event of Default.

         "Defaulted Interest" has the meaning specified in Section 307.

         "Defeasance" has the meaning specified in Section 1302.

         "Depositary"  means,  with respect to Securities of any series issuable
in whole or in part in the form of one or more  Global  Securities,  a  clearing
agency registered under the Exchange Act that is designated to act as Depositary
for such Securities as contemplated by Section 301.

         "Disqualified  Stock" means any Capital Stock that, by its terms (or by
the  terms of any  security  into  which it is  convertible  or for  which it is
exchangeable),  or upon the  happening of any event,  matures or is  mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, or is redeemable
at the option of the holder  thereof (other than upon a Change of Control of the
Company in circumstances  where the holders of the Securities would have similar
rights),  in whole or in part on or prior to one year after the Stated  Maturity
of the Securities.  The amount of Disqualified Stock shall be the greater of the
liquidation preference or mandatory or optional redemption price thereof.

         "Equity  Interests"  means Capital  Stock and all warrants,  options or
other  rights  to  acquire   Capital  Stock   (including  any   Indebtedness  or
Disqualified  Stock that is  convertible  into,  or  exchangeable  for,  Capital
Stock).

         "Event of Default" has the meaning specified in Section 501.

         "Exchange  Act"  means  the  Securities  Exchange  Act of 1934  and any
statute successor thereto, in each case as amended from time to time.

         "Expiration Date" has the meaning specified in Section 104.

         "GAAP" means generally accepted accounting  principles set forth in the
opinions and  pronouncements of the Accounting  Principles Board of the American
Institute of Certified Public  Accountants and statements and  pronouncements of
the Financial  Accounting  Standards  Board, or in such other statements by such
other entity as have been  approved by a significant  segment of the  accounting
profession, which are in effect on the Issue Date.



                                      -5-
<PAGE>

         "Global  Security"  means a Security that  evidences all or part of the
Securities  of any series and bears the legend set forth in Section 204 (or such
legend as may be specified as contemplated by Section 301 for such Securities).

         "guarantee"  means a guarantee (other than by endorsement of negotiable
instruments  for  collection  or deposit in the  ordinary  course of  business),
direct or indirect,  in any manner (including,  without  limitation,  letters of
credit and reimbursement  agreements in respect thereof),  of all or any part of
any Indebtedness.

         "Hedging   Obligations"   means,  with  respect  to  any  Person,   the
Obligations  of such Person under (i) interest  rate swap  agreements,  interest
rate cap  agreements  and  interest  rate  collar  agreements,  and  (ii)  other
agreements or arrangements  designed to protect such Person against fluctuations
in interest rates.

         "Holder"  means a Person in whose name a Security is  registered in the
Security Register.

         "Immediate Family Member" means,  with respect to any individual,  such
individual's spouse (past or current),  descendants (natural or adoptive, of the
whole or half  blood)  of the  parents  of such  individual,  such  individual's
grandparents and parents (natural or adoptive),  and the  grandparents,  parents
and descendants of parents (natural or adoptive,  of the whole or half blood) of
such individual's spouse (past or current).

         "incur" means, with respect to any obligation of any Person, to create,
issue, incur, assume or directly or indirectly  guarantee or in any other manner
become directly or indirectly  liable for any  Indebtedness  (and  "incurrence",
"incurred",  "incurable" and "incurring" shall have meanings  correlative to the
foregoing).

         "Indebtedness"  means,  with  respect  to any  Person,  whether  or not
contingent,  (i) all  indebtedness  of such Person for borrowed money or for the
deferred  purchase  price of  property or services  (other  than  current  trade
liabilities  incurred  in  the  ordinary  course  of  business  and  payable  in
accordance  with  customary  practices)  or which is evidenced by a note,  bond,
debenture or similar  instrument,  (ii) all Capital  Lease  Obligations  of such
Person,  (iii) all obligations of such Person in respect of letters of credit or
bankers'  acceptances issued or created for the account of such Person, (iv) all
Hedging  Obligations of such Person, (v) all liabilities  secured by any Lien on
any  property  owned by such  Person  even if such  Person  has not  assumed  or
otherwise  become  liable for the payment  thereof to the extent of the value of
the  property  subject  to such  Lien,  and  (vi) to the  extent  not  otherwise
included,  any guarantee by such person of any other  Person's  indebtedness  or
other obligations described in clauses (i) through (v) above.

         "Indenture" means this instrument as originally  executed and as it may
from  time  to  time  be  supplemented  or  amended  by one or  more  indentures
supplemental  hereto entered into pursuant to the applicable  provisions hereof,
including,  for all  purposes  of this  instrument  and  any  such  supplemental
indenture,  the  provisions  of the Trust  Indenture Act that are deemed to be a
part  of and  govern  this  instrument  and  any  such  supplemental  indenture,
respectively.  The term


                                      -6-
<PAGE>

"Indenture"  shall also  include the terms of  particular  series of  Securities
established as contemplated by Section 301.

         "interest",  when used  with  respect  to an  Original  Issue  Discount
Security which by its terms bears interest only after  Maturity,  means interest
payable after Maturity.

         "Interest Payment Date", when used with respect to any Security,  means
the Stated Maturity of an installment of interest on such Security.

         "Investment  Company Act" means the Investment  Company Act of 1940 and
any statute successor thereto, in each case as amended from time to time.

         "Issue  Date"  means the date of  initial  issuance  of the  Securities
pursuant to this Indenture.

         "Lien" means,  with respect to any asset, any mortgage,  lien,  pledge,
charge,  security  interest or encumbrance of any kind in respect of such asset,
whether or not filed,  recorded or  otherwise  perfected  under  applicable  law
(including any conditional sale or other title retention agreement, any lease in
the nature  thereof,  any option or other  agreement  to sell or give a security
interest in any asset and any filing of, or  agreement  to give,  any  financing
statement under the "Uniform  Commercial  Code" (or equivalent  statutes) of any
jurisdiction).

         "Maturity",  when used with respect to any Security,  means the date on
which the principal of such Security or an installment of principal  becomes due
and payable as therein or herein provided,  whether at the Stated Maturity or by
declaration of acceleration, call for redemption or otherwise.

         "Notice of Default"  means a written  notice of the kind  specified  in
Section 501(4) or 501(5).

         "Officers'  Certificate"  means a certificate signed by the Chairman of
the Board, a Vice Chairman of the Board, the Chief Executive Officer,  the Chief
Operating  Officer,  the  Chief  Financial  Officer,  the  President  or a  Vice
President,  and, without duplication,  by the Treasurer, an Assistant Treasurer,
the Controller,  the Secretary or an Assistant  Secretary,  of the Company,  and
delivered to the Trustee.

         "Opinion of  Counsel"  means a written  opinion of counsel,  who may be
counsel for the Company, and who shall be acceptable to the Trustee.

         "Original  Issue Discount  Security"  means any Security which provides
for an amount less than the principal  amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 502.

         "Outstanding",  when used with respect to Securities,  means, as of the
date of determination,  all Securities  theretofore  authenticated and delivered
under this Indenture, except:



                                      -7-
<PAGE>

                  (i)  Securities   theretofore  cancelled  by  the  Trustee  or
         delivered to the Trustee for cancellation;

                  (ii)  Securities for whose payment or redemption  money in the
         necessary amount has been theretofore deposited with the Trustee or any
         Paying  Agent  (other  than the  Company)  in trust  or set  aside  and
         segregated in trust by the Company (if the Company shall act as its own
         Paying  Agent) for the Holders of such  Securities;  provided  that, if
         such Securities are to be redeemed,  notice of such redemption has been
         duly  given   pursuant  to  this   Indenture  or   provision   therefor
         satisfactory to the Trustee has been made;

                  (iii)  Securities  as to which  Defeasance  has been  effected
         pursuant to Section 1302; and

                  (iv)  Securities  which have been paid pursuant to Section 306
         or in  exchange  for or in lieu of which  other  Securities  have  been
         authenticated and delivered pursuant to this Indenture,  other than any
         such  Securities in respect of which there shall have been presented to
         the Trustee proof satisfactory to it that such Securities are held by a
         bona  fide   purchaser  in  whose  hands  such   Securities  are  valid
         obligations of the Company;

provided,  however,  that in  determining  whether the Holders of the  requisite
principal  amount of the Outstanding  Securities  have given,  made or taken any
request,  demand,  authorization,  direction,  notice,  consent, waiver or other
action  hereunder as of any date, (A) the principal  amount of an Original Issue
Discount Security which shall be deemed to be Outstanding shall be the amount of
the  principal  thereof  which  would be due and  payable  as of such  date upon
acceleration  of the Maturity  thereof to such date pursuant to Section 502, (B)
if, as of such date, the principal  amount  payable at the Stated  Maturity of a
Security is not determinable,  the principal amount of such Security which shall
be deemed to be  Outstanding  shall be the amount as specified or  determined as
contemplated by Section 301, (C) the principal amount of a Security  denominated
in one or more foreign  currencies or currency units which shall be deemed to be
Outstanding shall be the U.S. dollar  equivalent,  determined as of such date in
the manner provided as  contemplated by Section 301, of the principal  amount of
such  Security  (or,  in the case of a Security  described  in Clause (A) or (B)
above, of the amount determined as provided in such Clause),  and (D) Securities
owned by the Company or any other  obligor upon the  Securities or any Affiliate
of the Company or of such other obligor shall be  disregarded  and deemed not to
be  Outstanding,  except  that,  in  determining  whether the  Trustee  shall be
protected in relying upon any such request,  demand,  authorization,  direction,
notice, consent, waiver or other action, only Securities which the Trustee knows
to be so owned  shall be so  disregarded.  Securities  so owned  which have been
pledged in good faith may be regarded as Outstanding if the pledgee  establishes
to the satisfaction of the Trustee the pledgee's right so to act with respect to
such  Securities  and that the pledgee is not the  Company or any other  obligor
upon the Securities or any Affiliate of the Company or of such other obligor.

         "Paying  Agent" means any Person  authorized  by the Company to pay the
principal  of or any  premium or  interest  on any  Securities  on behalf of the
Company.



                                      -8-
<PAGE>

         "Person"  means  any  individual,  corporation,   partnership,  limited
liability  company,  joint venture,  association,  joint stock  company,  trust,
unincorporated organization or government or any agency or political subdivision
thereof.

         "Place of  Payment",  when used with respect to the  Securities  of any
series,  means the place or places  where the  principal  of and any premium and
interest  on  the  Securities  of  that  series  are  payable  as  specified  as
contemplated by Section 301.

         "Predecessor  Security" of any particular Security means every previous
Security  evidencing all or a portion of the same debt as that evidenced by such
particular  Security;  and,  for the purposes of this  definition,  any Security
authenticated  and  delivered  under Section 306 in exchange for or in lieu of a
mutilated,  destroyed,  lost or stolen  Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

         "Principal  Shareholders"  means  Steven B.  Dodge,  Thomas H.  Stoner,
Hicks, Muse, Tate & Furst Incorporated,  Cox Telecom Towers,  Inc., Chase Equity
Associates,   LLC  and  Clear  Channel  Communications,   Inc.  including  their
Affiliates.

         "Redemption  Date",  when  used  with  respect  to any  Security  to be
redeemed,  means  the date  fixed for such  redemption  by or  pursuant  to this
Indenture.

         "Redemption  Price",  when  used with  respect  to any  Security  to be
redeemed,  means  the  price  at  which it is to be  redeemed  pursuant  to this
Indenture.

         "Regular Record Date" for the interest  payable on any Interest Payment
Date on the  Securities of any series means the date  specified for that purpose
as contemplated by Section 301.

         "Related Party" with respect to any Principal Shareholder means (i) any
80% (or more) owned  Subsidiary  or Immediate  Family  Member (in the case of an
individual) of such Principal Shareholder or (ii) any Person, the beneficiaries,
stockholders,  partners,  owners or Persons  beneficially holding an 80% or more
controlling  interest  of which  consist  of such  Principal  Shareholder  or an
Immediate  Family  Member,  or (iii) any  Person  employed  by the  Company in a
management capacity as of the Issue Date.

         "Responsible Officer", when used with respect to the Trustee, means the
chairman or any  vice-chairman  of the board of  directors,  the chairman or any
vice-chairman of the executive committee of the board of directors, the chairman
of the trust committee,  the president,  any vice president,  the secretary, any
assistant secretary,  the treasurer,  any assistant treasurer,  the cashier, any
assistant cashier,  any trust officer or assistant trust officer, the controller
or any  assistant  controller  or any other  officer of the Trustee  customarily
performing  functions  similar to those performed by any of the above designated
officers and also means,  with respect to a particular  corporate  trust matter,
any other  officer to whom such matter is referred  because of his  knowledge of
and familiarity with the particular subject.



                                      -9-
<PAGE>

         "Restricted Subsidiary" means a Subsidiary of the Company other than an
Unrestricted Subsidiary.

         "Securities"  has the  meaning  stated  in the  first  recital  of this
Indenture and more particularly means any Securities authenticated and delivered
under this Indenture.

         "Securities  Act"  means  the  Securities  Act of 1933 and any  statute
successor thereto, in each case as amended from time to time.

         "Security  Register"  and  "Security  Registrar"  have  the  respective
meanings specified in Section 305.

         "Senior  Bank Debt" means (i) the  Indebtedness  outstanding  under the
Credit Agreements,  and (ii) all Obligations incurred by or owing to the holders
or their agent or  representatives  of such  Indebtedness  outstanding under the
Credit  Agreement  (including,  but not  limited  to, all fees and  expenses  of
counsel and all other interest, charges, fees and expenses).

         "Senior Debt"  means

                  (i) with respect to the Company, the principal of and interest
         (including  post-petition  interest  whether or not allowed as a claim)
         on, and all other  amounts  owing in respect  of, (a) Senior Bank Debt,
         and (b) any other Indebtedness  permitted to be incurred by the Company
         under the  terms of this  Indenture  (including,  but not  limited  to,
         reasonable fees and expenses of counsel and all other charges, fees and
         expenses  incurred in connection  with such  Indebtedness),  unless the
         instrument  creating or  evidencing  such  Indebtedness  or pursuant to
         which such  Indebtedness  is outstanding  expressly  provides that such
         Indebtedness is on a parity with or subordinated in right of payment to
         the Securities; and

                  (ii) with respect to any Subsidiary  Guarantor,  the principal
         of  and  interest  (including  post-petition  interest  whether  or not
         allowed as a claim) on, and all other  amounts owing in respect of, (a)
         Senior  Bank  Debt  and  (b) any  other  Indebtedness  permitted  to be
         incurred by such Subsidiary Guarantor under the terms of this Indenture
         (including, but not limited to, reasonable fees and expenses of counsel
         and all other charges,  fees and expenses  incurred in connection  with
         such  Indebtedness),  unless the instrument creating or evidencing such
         Indebted-ness  or pursuant to which such  Indebtedness  is  outstanding
         expressly  provides  that  such  Indebtedness  is on a  parity  with or
         subordinated  in right of payment to the  Subsidiary  Guarantee of such
         Subsidiary Guarantor.

         Notwithstanding  the  foregoing,  Senior Debt shall not include (v) any
Indebtedness  that is represented by Disqualified  Stock,  (w) any liability for
federal, state, local, or other taxes, (x) any Indebtedness among or between the
Company,  any Restricted  Subsidiary or any of their  Affiliates,  (y) any trade
payables and any  Indebtedness  to trade  creditors  (other than amounts accrued
thereon)  incurred  for the  purchase  of goods or  materials,  or for  services
obtained,  in the


                                      -10-
<PAGE>

ordinary  course of business or any Obligations to trade creditors in respect of
any such  Indebtedness,  or (z) any  Indebtedness  (other than Senior Bank Debt)
that is incurred in violation of this Indenture.

         "Special Record Date" for the payment of any Defaulted Interest means a
date fixed by the Trustee pursuant to Section 307.

         "Stated  Maturity",  when  used with  respect  to any  Security  or any
installment of principal thereof or interest  thereon,  means the date specified
in such  Security as the fixed date on which the  principal of such  Security or
such installment of principal or interest is due and payable.

         "Subsidiary"  means a  corporation  more  than  50% of the  outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or  more  other  Subsidiaries,   or  by  the  Company  and  one  or  more  other
Subsidiaries.  For the purposes of this  definition,  "voting stock" means stock
which ordinarily has voting power for the election of directors,  whether at all
times  or only so long as no  senior  class of stock  has such  voting  power by
reason of any contingency.

         "Trustee"  means  the  Person  named  as the  "Trustee"  in  the  first
paragraph of this  instrument  until a successor  Trustee shall have become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Trustee" shall mean or include each Person who is then a Trustee hereunder, and
if at any time  there  is more  than one such  Person,  "Trustee"  as used  with
respect to the  Securities  of any series shall mean the Trustee with respect to
Securities of that series.

         "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force
at the date as of which this instrument was executed; provided, however, that in
the event the Trust  Indenture  Act of 1939 is amended  after such date,  "Trust
Indenture Act" means, to the extent  required by any such  amendment,  the Trust
Indenture Act of 1939 as so amended.

         "Unrestricted  Subsidiary"  means  (i) , (ii) ,  (iii) , and  (iv)  any
Subsidiary  of the  Company  that  at the  time  of  determination  shall  be an
Unrestricted Subsidiary (as designated by the Board of Directors of the Company,
as provided below) and (iii) any Subsidiary of an Unrestricted  Subsidiary.  The
Board of Directors of the Company may  designate  any  Subsidiary of the Company
(including any newly acquired or newly formed  Subsidiary) to be an Unrestricted
Subsidiary if all of the following conditions apply: (a) neither the Company nor
any of its Restricted  Subsidiaries provides credit support for any Indebtedness
of  such  Subsidiary   (including  any  undertaking,   agreement  or  instrument
evidencing such  Indebtedness),  (b) such Subsidiary is not liable,  directly or
indirectly,  with respect to any Indebtedness other than Unrestricted Subsidiary
Indebtedness,  (c) such Unrestricted Subsidiary is not a party to any agreement,
contract,  arrangement  or  understanding  at such time with the  Company or any
Restricted  Subsidiary  of the Company  unless the terms of any such  agreement,
contract,  arrangement or understanding  are no less favorable to the Company or
such  Restricted  Subsidiary  than those that might be obtained at the time from
Persons who are not  Affiliates  of the Company (the "Third Party Value") or, in
the event such condition is not  satisfied,  an amount


                                      -11-
<PAGE>

equal to the value of the portion of such  agreement,  contract,  arrangement or
understanding  to such  Subsidiary  in excess of the Third  Party Value shall be
deemed a Restricted Payment,  and (d) such Unrestricted  Subsidiary does not own
any Capital Stock of any Subsidiary of the Company that has not theretofore been
or is not simultaneously being designated an Unrestricted  Subsidiary.  Any such
designation  by the Board of Directors of the Company  shall be evidenced to the
Trustee by filing  with the  Trustee a board  resolution  giving  effect to such
designation  and an  Officers'  Certificate  certifying  that  such  designation
complies  with the foregoing  conditions.  The Board of Directors of the Company
may designate any Unrestricted Subsidiary as a Restricted Subsidiary.

         "U.S. Government Obligation" has the meaning specified in Section 1304.

         "Vice President", when used with respect to the Company or the Trustee,
means any vice  president,  whether or not  designated  by a number or a word or
words added before or after the title "vice president".

         Section 102 Compliance Certificates and Opinions.

         Upon any  application  or request by the Company to the Trustee to take
any action under any provision of this  Indenture,  the Company shall furnish to
the Trustee such  certificates  and opinions as may be required  under the Trust
Indenture Act. Each such certificate or opinion shall be given in the form of an
Officers'  Certificate,  if to be  given by an  officer  of the  Company,  or an
Opinion  of  Counsel,  if to be given by  counsel,  and  shall  comply  with the
requirements of the Trust Indenture Act and any other  requirements set forth in
this Indenture.

         Every  certificate  or  opinion  with  respect  to  compliance  with  a
condition or covenant  provided for in this Indenture  (except for  certificates
provided for in Section 1004) shall include,

                  (1) a statement that each individual  signing such certificate
         or opinion has read such  covenant  or  condition  and the  definitions
         herein relating thereto;

                  (2) a  brief  statement  as to the  nature  and  scope  of the
         examination  or  investigation  upon which the  statements  or opinions
         contained in such certificate or opinion are based;

                  (3) a statement that, in the opinion of each such  individual,
         he has made such examination or investigation as is necessary to enable
         him to express an informed  opinion as to whether or not such  covenant
         or condition has been complied with; and

                  (4) a  statement  as to  whether,  in the opinion of each such
         individual, such condition or covenant has been complied with.

         Section 103 Form of Documents Delivered to Trustee.

         In any case where  several  matters are required to be certified by, or
covered by an opinion of, any specified  Person,  it is not  necessary  that all
such  matters  be  certified  by, or


                                      -12-
<PAGE>

covered by the opinion of, only one such Person, or that they be so certified or
covered by only one document, but one such Person may certify or give an opinion
with  respect to some  matters  and one or more  other such  Persons as to other
matters,  and any such Person may certify or give an opinion as to such  matters
in one or several documents.

         Any  certificate  or opinion of an officer of the Company may be based,
insofar as it relates to legal  matters,  upon a  certificate  or opinion of, or
representations  by,  counsel,  unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or  representations
with respect to the matters upon which his  certificate  or opinion is based are
erroneous.  Any such certificate or opinion of counsel may be based,  insofar as
it  relates  to  factual   matters,   upon  a  certificate  or  opinion  of,  or
representations  by, an officer or  officers  of the  Company  stating  that the
information  with respect to such factual  matters is in the  possession  of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know,  that the certificate or opinion or  representations  with respect to such
matters are erroneous.

         Where any  Person is  required  to make,  give or  execute  two or more
applications,  requests, consents,  certificates,  statements, opinions or other
instruments  under this Indenture,  they may, but need not, be consolidated  and
form one instrument.

         Section 104 Acts of Holders; Record Dates.

         Any request, demand, authorization,  direction, notice, consent, waiver
or other action  provided or permitted  by this  Indenture to be given,  made or
taken by Holders may be embodied in and evidenced by one or more  instruments of
substantially  similar  tenor  signed by such Holders in person or by agent duly
appointed in writing;  and, except as herein otherwise expressly provided,  such
action shall become  effective when such instrument or instruments are delivered
to the Trustee and, where it is hereby expressly required,  to the Company. Such
instrument  or  instruments  (and the  action  embodied  therein  and  evidenced
thereby) are herein  sometimes  referred to as the "Act" of the Holders  signing
such instrument or instruments.  Proof of execution of any such instrument or of
a writing  appointing any such agent shall be sufficient for any purpose of this
Indenture  and (subject to Section 601)  conclusive  in favor of the Trustee and
the Company, if made in the manner provided in this Section.

         The fact and date of the execution by any Person of any such instrument
or writing may be proved by the affidavit of a witness of such execution or by a
certificate  of a notary  public  or  other  officer  authorized  by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Where such execution is by
a  signer  acting  in a  capacity  other  than  his  individual  capacity,  such
certificate  or  affidavit  shall  also  constitute   sufficient  proof  of  his
authority. The fact and date of the execution of any such instrument or writing,
or the  authority of the Person  executing  the same,  may also be proved in any
other manner which the Trustee deems sufficient.

         The ownership of Securities shall be proved by the Security Register.



                                      -13-
<PAGE>

         Any request, demand, authorization,  direction, notice, consent, waiver
or other Act of the Holder of any Security shall bind every future Holder of the
same Security and the Holder of every Security  issued upon the  registration of
transfer  thereof  or in  exchange  therefor  or in lieu  thereof  in respect of
anything  done,  omitted or suffered to be done by the Trustee or the Company in
reliance  thereon,  whether  or not  notation  of such  action is made upon such
Security.

         The  Company  may set any  day as a  record  date  for the  purpose  of
determining  the Holders of  Outstanding  Securities  of any series  entitled to
give,  make or take  any  request,  demand,  authorization,  direction,  notice,
consent,  waiver or other action  provided or permitted by this  Indenture to be
given, made or taken by Holders of Securities of such series,  provided that the
Company  may not set a record date for,  and the  provisions  of this  paragraph
shall not apply  with  respect  to,  the  giving or making of (i) any  Notice of
Default,  (ii) any declaration of acceleration referred to in Section 502, (iii)
any request to institute  proceedings  referred to in Section 507(2) or (iv) any
direction referred to in Section 512. If any record date is set pursuant to this
paragraph,  the Holders of Outstanding Securities of the relevant series on such
record  date,  and no other  Holders,  shall be  entitled  to take the  relevant
action,  whether or not such  Holders  remain  Holders  after such record  date;
provided  that no such action  shall be effective  hereunder  unless taken on or
prior to the applicable  Expiration  Date by Holders of the requisite  principal
amount of Outstanding  Securities of such series on such record date. Nothing in
this  paragraph  shall be  construed  to prevent the Company  from setting a new
record  date for any  action  for which a record  date has  previously  been set
pursuant  to this  paragraph  (whereupon  the record date  previously  set shall
automatically  and with no action by any Person be cancelled  and of no effect),
and nothing in this  paragraph  shall be  construed  to render  ineffective  any
action  taken by  Holders  of the  requisite  principal  amount  of  Outstanding
Securities  of the  relevant  series on the date such action is taken.  Promptly
after any record date is set pursuant to this paragraph, the Company, at its own
expense,  shall cause notice of such record date, the proposed action by Holders
and the applicable  Expiration Date to be given to the Trustee in writing and to
each  Holder of  Securities  of the  relevant  series in the manner set forth in
Section 106.

         With  respect to any record  date set  pursuant  to this  Section,  the
Company may designate any day as the "Expiration Date" and from time to time may
change the  Expiration  Date to any earlier or later day;  provided that no such
change shall be effective  unless notice of the proposed new Expiration  Date is
given to the  Trustee  in  writing,  and to each  Holder  of  Securities  of the
relevant  series in the  manner  set forth in  Section  106,  on or prior to the
existing  Expiration  Date. If an Expiration Date is not designated with respect
to any record date set pursuant to this Section,  the Company shall be deemed to
have initially designated the 180th day after such record date as the Expiration
Date with respect thereto, subject to its right to change the Expiration Date as
provided in this paragraph.

         Without limiting the foregoing, a Holder entitled hereunder to take any
action hereunder with regard to any particular Security may do so with regard to
all or any part of the principal  amount of such Security or by one or more duly
appointed  agents  each of which may do so  pursuant  to such  appointment  with
regard to all or any part of such principal amount.



                                      -14-
<PAGE>

         Section 105 Notices, Etc., to Trustee and Company.

         Any request, demand, authorization,  direction, notice, consent, waiver
or Act of Holders or other  document  provided or permitted by this Indenture to
be made upon, given or furnished to, or filed with,

                  (1) the  Trustee  by any  Holder  or by the  Company  shall be
         sufficient  for every purpose  hereunder if made,  given,  furnished or
         filed in writing to or with the Trustee at its Corporate  Trust Office,
         Attention: ................., or

                  (2) the  Company  by the  Trustee  or by any  Holder  shall be
         sufficient  for  every  purpose   hereunder  (unless  otherwise  herein
         expressly  provided)  if in writing  and  mailed,  first-class  postage
         prepaid, to the Company addressed to it at the address of its principal
         office  specified in the first  paragraph of this  instrument or at any
         other  address  previously  furnished  in writing to the Trustee by the
         Company.

         Section 106 Notice to Holders; Waiver.

         Where this Indenture  provides for notice to Holders of any event, such
notice shall be sufficiently given (unless otherwise herein expressly  provided)
if in writing and mailed,  first-class  postage prepaid, to each Holder affected
by such event, at his address as it appears in the Security Register,  not later
than the latest date (if any),  and not earlier than the earliest date (if any),
prescribed for the giving of such notice. In any case where notice to Holders is
given by mail,  neither the failure to mail such  notice,  nor any defect in any
notice so mailed,  to any particular Holder shall affect the sufficiency of such
notice with respect to other Holders.  Where this Indenture  provides for notice
in any manner,  such  notice may be waived in writing by the Person  entitled to
receive such notice,  either before or after the event, and such waiver shall be
the equivalent of such notice.  Waivers of notice by Holders shall be filed with
the Trustee,  but such filing shall not be a condition precedent to the validity
of any action taken in reliance upon such waiver.
         In case by reason of the  suspension  of  regular  mail  service  or by
reason of any other cause it shall be impracticable to give such notice by mail,
then such  notification  as shall be made with the approval of the Trustee shall
constitute a sufficient notification for every purpose hereunder.

         Section 107 Conflict with Trust Indenture Act.

         If any provision hereof limits, qualifies or conflicts with a provision
of the Trust  Indenture Act which is required under such Act to be a part of and
govern this Indenture,  the latter provision shall control.  If any provision of
this  Indenture  modifies or excludes any  provision of the Trust  Indenture Act
which may be so modified or excluded,  the latter  provision  shall be deemed to
apply to this Indenture as so modified or to be excluded, as the case may be.



                                      -15-
<PAGE>

         Section 108 Effect of Headings and Table of Contents.

         The Article and Section  headings  herein and the Table of Contents are
for convenience only and shall not affect the construction hereof.

         Section 109 Successors and Assigns.

         All  covenants and  agreements  in this  Indenture by the Company shall
bind its successors and assigns, whether so expressed or not.

         Section 110 Separability Clause.

         In case any provision in this Indenture or in the  Securities  shall be
invalid, illegal or unenforceable,  the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

         Section 111 Benefits of Indenture.

         Nothing in this  Indenture  or in the  Securities,  express or implied,
shall give to any  Person,  other than the parties  hereto and their  successors
hereunder,  the holders of Senior Debt and the Holders, any benefit or any legal
or equitable right, remedy or claim under this Indenture.

         Section 112 Governing Law.

         This Indenture and the Securities shall be governed by and construed in
accordance with the law of the State of New York.

         Section 113 Legal Holidays.

         In any case where any Interest Payment Date,  Redemption Date or Stated
Maturity of any  Security  shall not be a Business  Day at any Place of Payment,
then (notwithstanding any other provision of this Indenture or of the Securities
(other than a provision  of any  Security  which  specifically  states that such
provision shall apply in lieu of this Section)) payment of interest or principal
(and  premium,  if any) need not be made at such  Place of Payment on such date,
but may be made on the next  succeeding  Business  Day at such  Place of Payment
with the same  force  and  effect  as if made on the  Interest  Payment  Date or
Redemption Date, or at the Stated Maturity.



                                      -16-
<PAGE>

                                  ARTICLE TWO

                                 Security Forms

         Section 201 Forms Generally.

         The  Securities of each series shall be in  substantially  the form set
forth in this  Article,  or in such  other  form as shall be  established  by or
pursuant to a Board Resolution or in one or more indentures supplemental hereto,
in each case with such  appropriate  insertions,  omissions,  substitutions  and
other  variations as are required or permitted by this  Indenture,  and may have
such  letters,  numbers or other  marks of  identification  and such  legends or
endorsements  placed  thereon as may be required to comply with the rules of any
securities exchange or Depositary therefor or as may, consistently  herewith, be
determined  by the officers  executing  such  Securities,  as evidenced by their
execution  thereof.  If the form of Securities of any series is  established  by
action taken pursuant to a Board Resolution,  a copy of an appropriate record of
such action shall be certified by the Secretary or an Assistant Secretary of the
Company and  delivered to the Trustee at or prior to the delivery of the Company
Order  contemplated by Section 303 for the  authentication  and delivery of such
Securities.

         The definitive Securities shall be printed, lithographed or engraved on
steel engraved borders or may be produced in any other manner, all as determined
by the officers  executing such  Securities,  as evidenced by their execution of
such Securities.

         Section 202 Form of Face of Security.

         [Insert  any  legend  required  by the  Internal  Revenue  Code and the
regulations thereunder.]

           ..........................................................

   ..........................................................................

No. .........                                                         $ ........

         American Tower  Corporation,  a corporation duly organized and existing
under the laws of Delaware (herein called the "Company", which term includes any
successor  Person  under  the  Indenture  hereinafter  referred  to),  for value
received,          hereby          promises          to          pay          to
 ...............................................,   or  registered  assigns,  the
principal    sum   of    ......................................    Dollars    on
 ........................................................  [if the Security is to
bear  interest  prior to Maturity,  insert-- , and to pay interest  thereon from
 .............  or from the most recent  Interest  Payment Date to which interest
has  been  paid  or  duly  provided  for,  semi-annually  on  ............   and
 ............ in each year, commencing ........., at the rate of ....% per annum,
until the principal hereof is paid or made available for payment,  provided that
any  principal  and premium,  and any such  installment  of  interest,  which is
overdue  shall bear  interest  at the rate of ...% per annum (to the extent that
the payment of such interest shall be legally enforceable),  from the dates such
amounts  are due until they are paid or made  available  for  payment,  and such
interest  shall be payable on demand.  The interest so payable,  and  punctually
paid or duly  provided  for, on any


                                      -17-
<PAGE>

Interest Payment Date will, as provided in such Indenture, be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered  at the  close  of  business  on the  Regular  Record  Date  for such
interest, which shall be the ....... or ....... (whether or not a Business Day),
as the case may be, next preceding such Interest Payment Date. Any such interest
not so punctually  paid or duly provided for will forthwith  cease to be payable
to the Holder on such  Regular  Record Date and may either be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered at the close of business on a Special  Record Date for the payment of
such  Defaulted  Interest to be fixed by the Trustee,  notice  whereof  shall be
given to Holders  of  Securities  of this  series not less than 10 days prior to
such Special  Record Date, or be paid at any time in any other lawful manner not
inconsistent  with the  requirements  of any  securities  exchange  on which the
Securities of this series may be listed, and upon such notice as may be required
by such exchange, all as more fully provided in said Indenture].

[If the  Security  is not to bear  interest  prior to  Maturity,  insert  -- The
principal  of this  Security  shall  not bear  interest  except in the case of a
default in payment of principal upon acceleration,  upon redemption or at Stated
Maturity and in such case the overdue  principal  and any overdue  premium shall
bear  interest at the rate of ....% per annum (to the extent that the payment of
such interest shall be legally enforceable), from the dates such amounts are due
until they are paid or made  available  for  payment.  Interest  on any  overdue
principal or premium  shall be payable on demand.  Any such  interest on overdue
principal or premium which is not paid on demand shall bear interest at the rate
of  ......%  per annum (to the  extent  that the  payment  of such  interest  on
interest shall be legally  enforceable),  from the date of such demand until the
amount so  demanded  is paid or made  available  for  payment.  Interest  on any
overdue interest shall be payable on demand.]

         Payment of the principal of (and premium, if any) and any such interest
on this Security will be made at the office or agency of the Company  maintained
for that purpose in ............,  in such coin or currency of the United States
of America as at the time of payment is legal  tender for  payment of public and
private debts;  provided,  however, that at the option of the Company payment of
interest  may be made by check  mailed to the  address  of the  Person  entitled
thereto as such address shall appear in the Security Register.

         Reference is hereby made to the further provisions of this Security set
forth on the reverse  hereof,  which further  provisions  shall for all purposes
have the same effect as if set forth at this place.



                                      -18-
<PAGE>

         Unless the  certificate of  authentication  hereon has been executed by
the Trustee referred to on the reverse hereof by manual signature, this Security
shall  not be  entitled  to any  benefit  under  the  Indenture  or be  valid or
obligatory for any purpose.

         In Witness  Whereof,  the Company has caused this instrument to be duly
executed under its corporate seal.

Dated:                                           American Tower Corporation



                                                 By.............................
                                                     Title:
Attest:

 .................................
Title:

         Section 203 Form of Reverse of Security.

         This  Security is one of a duly  authorized  issue of securities of the
Company (herein called the "Securities"), issued and to be issued in one or more
series  under an  Indenture,  dated as of  ...............  (herein  called  the
"Indenture",  which  term  shall  have  the  meaning  assigned  to  it  in  such
instrument),  between the Company and  ...................,  as Trustee  (herein
called the  "Trustee",  which term  includes  any  successor  trustee  under the
Indenture), and reference is hereby made to the Indenture for a statement of the
respective rights,  limitations of rights,  duties and immunities  thereunder of
the  Company,  the  Trustee,  the  holders of Senior Debt and the Holders of the
Securities  and of the terms  upon  which  the  Securities  are,  and are to be,
authenticated  and delivered.  This Security is one of the series  designated on
the face hereof [if applicable, insert-- , limited in aggregate principal amount
to $...........].

         [If  applicable,  insert-- The Securities of this series are subject to
redemption upon not less than 30 days' notice by mail, [if applicable,  insert--
(1) on ...........  in any year commencing with the year ......  and ending with
the year  ......  through  operation  of the  sinking  fund for this series at a
Redemption Price equal to 100% of the principal amount, and (2)] at any time [if
applicable,  insert-- on or after  ..........,  19..], as a whole or in part, at
the election of the Company,  at the following  Redemption  Prices (expressed as
percentages of the principal amount): If redeemed [if applicable, insert-- on or
before  ...............,  ...%,  and if  redeemed]  during the  12-month  period
beginning ............. of the years indicated,


                         Redemption                                  Redemption
      Year                  Price                 Year                 Price






                                      -19-
<PAGE>

and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption [if  applicable,  insert -- (whether
through  operation of the sinking fund or otherwise)]  with accrued  interest to
the Redemption  Date, but interest  installments  whose Stated Maturity is on or
prior to such Redemption Date will be payable to the Holders of such Securities,
or one or more Predecessor Securities, of record at the close of business on the
relevant  Record Dates  referred to on the face  hereof,  all as provided in the
Indenture.]

         [If  applicable,  insert-- The Securities of this series are subject to
redemption  upon not less than 30 days' notice by mail, (1) on  ............  in
any year  commencing  with the year ....  and ending with the year ....  through
operation  of the  sinking  fund for this  series at the  Redemption  Prices for
redemption  through  operation of the sinking fund  (expressed as percentages of
the  principal  amount)  set forth in the table  below,  and (2) at any time [if
applicable,  insert-- on or after  ............],  as a whole or in part, at the
election of the Company, at the Redemption Prices for redemption  otherwise than
through operation of the sinking fund (expressed as percentages of the principal
amount) set forth in the table below:  If redeemed  during the  12-month  period
beginning ............ of the years indicated,


               Redemption Price Redemption Price For
                          For Redemption                  Redemption Otherwise
                        Through Operation                Than Through Operation
                              of the                       of the Sinking Fund
Year                       Sinking Fund                  ----------------------
- ----                     ----------------





and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption  (whether  through  operation of the
sinking fund or otherwise)  with accrued  interest to the  Redemption  Date, but
interest  installments  whose Stated  Maturity is on or prior to such Redemption
Date  will  be  payable  to the  Holders  of  such  Securities,  or one or  more
Predecessor  Securities,  of  record at the close of  business  on the  relevant
Record Dates referred to on the face hereof, all as provided in the Indenture.]

         [If applicable,  insert -- Notwithstanding  the foregoing,  the Company
may not,  prior to  .............,  redeem  any  Securities  of this  series  as
contemplated by [if applicable, insert -- Clause (2) of] the preceding paragraph
as a part of, or in anticipation of, any refunding operation by the application,
directly  or  indirectly,  of moneys  borrowed  having an  interest  cost to the
Company (calculated in accordance with generally accepted financial practice) of
less than .....% per annum.]

         [If applicable, insert -- The sinking fund for this series provides for
the redemption on ............  in each year beginning with the year ....... and
ending  with  the  year  ......  of [if  applicable,


                                      -20-
<PAGE>

insert -- not less than  $..........  ("mandatory  sinking  fund")  and not more
than]  $.........  aggregate  principal  amount of  Securities  of this  series.
Securities  of this series  acquired or redeemed by the Company  otherwise  than
through [if  applicable,  insert --  mandatory]  sinking  fund  payments  may be
credited against  subsequent [if applicable,  insert -- mandatory]  sinking fund
payments  otherwise  required  to be made  [if  applicable,  insert  -- , in the
inverse order in which they become due].]

         [If the Security is subject to redemption of any kind, insert -- In the
event of  redemption of this Security in part only, a new Security or Securities
of this  series  and of like tenor for the  unredeemed  portion  hereof  will be
issued in the name of the Holder hereof upon the cancellation hereof.]

         The indebtedness evidenced by this Security is, to the extent set forth
in the  Indenture,  subordinate  and  subject  in right of  payment to the prior
payment  in full  in cash or Cash  Equivalents  of all  Senior  Debt,  and  this
Security is issued  subject to the  provisions  of the  Indenture  with  respect
thereto.  Each Holder of this Security, by accepting the same, (a) agrees to and
shall be bound by such provisions, (b) authorizes and directs the Trustee on his
behalf to take such action as may be necessary or  appropriate to effectuate the
subordination so provided and (c) appoints the Trustee his  attorney-in-fact for
any and all such purposes.

         [If  applicable,  insert  --  The  Indenture  contains  provisions  for
defeasance  at any  time of [the  entire  indebtedness  of this  Security]  [or]
[certain  restrictive  covenants  and  Events of  Default  with  respect to this
Security] [, in each case] upon compliance with certain  conditions set forth in
the Indenture.]

         [If the Security is not an Original Issue Discount Security,  insert --
If an Event of Default with respect to Securities of this series shall occur and
be  continuing,  the principal of the  Securities of this series may be declared
due and payable in the manner and with the effect provided in the Indenture.]

         [If the Security is an Original Issue Discount  Security,  insert -- If
an Event of Default with respect to Securities of this series shall occur and be
continuing,  an amount of  principal  of the  Securities  of this  series may be
declared  due and  payable in the manner  and with the  effect  provided  in the
Indenture.  Such amount shall be equal to -- insert formula for  determining the
amount.  Upon payment (i) of the amount of principal so declared due and payable
and (ii) of interest on any overdue  principal,  premium and  interest  (in each
case  to the  extent  that  the  payment  of  such  interest  shall  be  legally
enforceable),  all of the Company's obligations in respect of the payment of the
principal of and premium and interest,  if any, on the Securities of this series
shall terminate.]

         The Indenture permits, with certain exceptions as therein provided, the
amendment  thereof and the  modification  of the rights and  obligations  of the
Company  and the rights of the  Holders of the  Securities  of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of 66 2/3% in principal  amount of the  Securities at the
time  Outstanding  of each series to be affected.  The  Indenture  also contains



                                      -21-
<PAGE>

provisions  permitting the Holders of specified  percentages in principal amount
of the  Securities  of each  series  at the time  Outstanding,  on behalf of the
Holders of all  Securities  of such series,  to waive  compliance by the Company
with certain  provisions of the  Indenture  and certain past defaults  under the
Indenture  and their  consequences.  Any such consent or waiver by the Holder of
this  Security  shall be  conclusive  and binding  upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer  hereof or in exchange  therefor or in lieu  hereof,  whether or not
notation of such consent or waiver is made upon this Security.

         As provided  in and subject to the  provisions  of the  Indenture,  the
Holder of this  Security  shall not have the right to institute  any  proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder,  unless such Holder shall have previously given
the Trustee written notice of a continuing  Event of Default with respect to the
Securities of this series,  the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the  Trustee  to  institute  proceedings  in respect of such Event of
Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have  received  from the Holders of a majority in principal  amount of
Securities of this series at the time Outstanding a direction  inconsistent with
such  request,  and shall have failed to institute any such  proceeding,  for 60
days after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit  instituted  by the Holder of this  Security for the
enforcement of any payment of principal hereof or any premium or interest hereon
on or after the respective due dates expressed herein.

         No reference  herein to the Indenture and no provision of this Security
or of the Indenture  shall alter or impair the obligation of the Company,  which
is  absolute  and  unconditional,  to pay the  principal  of and any premium and
interest  on this  Security  at the  times,  place and rate,  and in the coin or
currency, herein prescribed.

         As provided in the Indenture and subject to certain limitations therein
set  forth,  the  transfer  of this  Security  is  registrable  in the  Security
Register,  upon surrender of this Security for  registration  of transfer at the
office or agency of the  Company  in any place  where the  principal  of and any
premium  and  interest  on this  Security  are  payable,  duly  endorsed  by, or
accompanied  by a written  instrument  of transfer in form  satisfactory  to the
Company and the Security  Registrar  duly  executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Securities of
this  series and of like tenor,  of  authorized  denominations  and for the same
aggregate  principal  amount,  will be issued to the  designated  transferee  or
transferees.

         The  Securities  of this series are issuable  only in  registered  form
without coupons in denominations of $.......  and any integral multiple thereof.
As provided in the  Indenture  and  subject to certain  limitations  therein set
forth, Securities of this series are exchangeable for a like aggregate principal
amount of Securities of this series and of like tenor of a different  authorized
denomination, as requested by the Holder surrendering the same.



                                      -22-
<PAGE>

         No service charge shall be made for any such  registration  of transfer
or exchange,  but the Company may require  payment of a sum  sufficient to cover
any tax or other governmental charge payable in connection therewith.

         Prior to due presentment of this Security for registration of transfer,
the  Company,  the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name this Security is registered as the owner hereof for all
purposes,  whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

         All terms used in this  Security  which are  defined  in the  Indenture
shall have the meanings assigned to them in the Indenture.

         Section 204 Form of Legend for Global Securities.

         Unless  otherwise  specified  as  contemplated  by Section  301 for the
Securities evidenced thereby,  every Global Security authenticated and delivered
hereunder shall bear a legend in substantially the following form:

         This Security is a Global  Security within the meaning of the Indenture
         hereinafter  referred to and is  registered in the name of a Depositary
         or a nominee thereof. This Security may not be exchanged in whole or in
         part for a Security  registered,  and no transfer  of this  Security in
         whole or in part may be  registered,  in the name of any  Person  other
         than such  Depositary  or a  nominee  thereof,  except  in the  limited
         circumstances described in the Indenture.

         Section 205 Form of Trustee's Certificate of Authentication.

         The Trustee's  certificates of authentication shall be in substantially
the following form:

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                                            ...................................,
                                                                      As Trustee

                                            By..................................
                                                              Authorized Officer




                                      -23-
<PAGE>

                                 ARTICLE THREE

                                 The Securities

         Section 301 Amount Unlimited; Issuable in Series.

         The aggregate principal amount of Securities which may be authenticated
and delivered under this Indenture is unlimited.

         The  Securities  may be issued in one or more  series.  There  shall be
established in or pursuant to a Board  Resolution  and,  subject to Section 303,
set forth, or determined in the manner provided, in an Officers' Certificate, or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series,

                  (a) the title of the  Securities  of the series  (which  shall
         distinguish  the Securities of the series from  Securities of any other
         series);

                  (b) any  limit  upon the  aggregate  principal  amount  of the
         Securities of the series which may be authenticated and delivered under
         this Indenture (except for Securities  authenticated and delivered upon
         registration  of transfer of, or in exchange  for, or in lieu of, other
         Securities of the series pursuant to Section 304, 305, 306, 906 or 1107
         and except for any  Securities  which,  pursuant  to Section  303,  are
         deemed never to have been authenticated and delivered hereunder);

                  (c) the  Person  to whom any  interest  on a  Security  of the
         series  shall be  payable,  if other than the Person in whose name that
         Security (or one or more  Predecessor  Securities) is registered at the
         close of business on the Regular Record Date for such interest;

                  (d) the date or dates on which the principal of any Securities
         of the series is payable;

                  (e) the rate or rates at which any  Securities  of the  series
         shall  bear  interest,  if any,  the date or dates  from which any such
         interest  shall  accrue,  the Interest  Payment Dates on which any such
         interest  shall be payable  and the  Regular  Record  Date for any such
         interest payable on any Interest Payment Date;

                  (f) the place or places where the principal of and any premium
         and interest on any Securities of the series shall be payable;

                  (g) the period or periods within which, the price or prices at
         which and the terms and  conditions  upon which any  Securities  of the
         series  may be  redeemed,  in whole or in part,  at the  option  of the
         Company and, if other than by a Board  Resolution,  the manner in which
         any  election  by  the  Company  to  redeem  the  Securities  shall  be
         evidenced;



                                      -24-
<PAGE>

                  (h) the  obligation,  if any,  of the  Company  to  redeem  or
         purchase any  Securities of the series  pursuant to any sinking fund or
         analogous  provisions  or at the option of the Holder  thereof  and the
         period or periods  within  which,  the price or prices at which and the
         terms and  conditions  upon which any Securities of the series shall be
         redeemed  or  purchased,   in  whole  or  in  part,  pursuant  to  such
         obligation;

                  (i) if other than  denominations  of $1,000  and any  integral
         multiple  thereof,  the  denominations  in which any  Securities of the
         series shall be issuable;

                  (j) if the amount of  principal  of or any premium or interest
         on any Securities of the series may be determined  with reference to an
         index or pursuant to a formula,  the manner in which such amounts shall
         be determined;

                  (k) if  other  than  the  currency  of the  United  States  of
         America,  the  currency,  currencies  or  currency  units in which  the
         principal of or any premium or interest on any Securities of the series
         shall be payable and the manner of determining  the equivalent  thereof
         in the  currency  of the  United  States of  America  for any  purpose,
         including for purposes of the  definition of  "Outstanding"  in Section
         101;

                  (l) if the  principal  of or any  premium or  interest  on any
         Securities  of the  series is to be  payable,  at the  election  of the
         Company or the Holder  thereof,  in one or more  currencies or currency
         units other than that or those in which such  Securities  are stated to
         be payable,  the currency,  currencies  or currency  units in which the
         principal of or any premium or interest on such  Securities as to which
         such  election is made shall be payable,  the periods  within which and
         the terms and conditions upon which such election is to be made and the
         amount  so  payable  (or the  manner  in  which  such  amount  shall be
         determined);

                  (m) if other than the entire  principal  amount  thereof,  the
         portion of the principal  amount of any  Securities of the series which
         shall be payable  upon  declaration  of  acceleration  of the  Maturity
         thereof pursuant to Section 502;

                  (n) if the principal  amount payable at the Stated Maturity of
         any Securities of the series will not be  determinable as of any one or
         more dates  prior to the Stated  Maturity,  the amount  which  shall be
         deemed to be the  principal  amount of such  Securities  as of any such
         date for any purpose  thereunder or hereunder,  including the principal
         amount  thereof which shall be due and payable upon any Maturity  other
         than the Stated  Maturity or which shall be deemed to be Outstanding as
         of any date prior to the Stated  Maturity  (or,  in any such case,  the
         manner in which such amount deemed to be the principal  amount shall be
         determined);

                  (o) if applicable, that the Securities of the series, in whole
         or any specified part, shall be defeasible  pursuant to Section 1302 or
         Section  1303 or both  such  Sections  and,  if  other  than by a Board
         Resolution,  the manner in which any election by the Company to defease
         such Securities shall be evidenced;



                                      -25-
<PAGE>

                  (p) if applicable,  that any Securities of the series shall be
         issuable  in  whole  or in  part  in the  form  of one or  more  Global
         Securities  and, in such case,  the  respective  Depositaries  for such
         Global  Securities,  the form of any legend or legends  which  shall be
         borne by any such Global Security in addition to or in lieu of that set
         forth in Section 204 and any circumstances in addition to or in lieu of
         those set forth in Clause (2) of the last  paragraph  of Section 305 in
         which any such Global Security may be exchanged in whole or in part for
         Securities  registered,  and any  transfer of such  Global  Security in
         whole or in part  may be  registered,  in the name or names of  Persons
         other  than  the  Depositary  for such  Global  Security  or a  nominee
         thereof;

                  (q) any  addition to or change in the Events of Default  which
         applies to any  Securities of the series and any change in the right of
         the Trustee or the requisite  Holders of such Securities to declare the
         principal amount thereof due and payable pursuant to Section 502;

                  (r) any  addition to or change in the  covenants  set forth in
         Article Ten which applies to Securities of the series;

                  (s) if  applicable,  that the  Securities  of the  series  are
         convertible  into or exchangeable  for Common Stock or other securities
         of the Company, the period or periods within which, the price or prices
         at which and the terms and conditions  upon which,  and the limitations
         and  restrictions,  if any,  upon which,  any  Securities of the series
         shall be convertible or exchangeable,  in whole or in part, into Common
         Stock or other securities of the Company; and

                  (t) any other  terms of the series  (which  terms shall not be
         inconsistent with the provisions of this Indenture, except as permitted
         by Section 901(5)).

         All  Securities  of any one  series  shall be  substantially  identical
except as to denomination and except as may otherwise be provided in or pursuant
to the Board  Resolution  referred  to above and  (subject  to Section  303) set
forth,  or  determined  in the manner  provided,  in the  Officers'  Certificate
referred to above or in any such indenture supplemental hereto.

         If any of the terms of the  series  are  established  by  action  taken
pursuant to a Board Resolution,  a copy of an appropriate  record of such action
shall be certified by the Secretary or an Assistant Secretary of the Company and
delivered  to  the  Trustee  at or  prior  to  the  delivery  of  the  Officers'
Certificate setting forth the terms of the series.

         The Securities shall be subordinated in right of payment to Senior Debt
as provided in Article Fourteen.

         Section 302 Denominations.

         The Securities of each series shall be issuable only in registered form
without  coupons  and  only in such  denominations  as  shall  be  specified  as
contemplated  by Section 301. In the absence of any such specified  denomination
with respect to the  Securities  of any series,  the


                                      -26-
<PAGE>

Securities of such series shall be issuable in  denominations  of $1,000 and any
integral multiple thereof.

         Section 303 Execution, Authentication, Delivery and Dating.

         The  Securities  shall be  executed  on  behalf of the  Company  by its
Chairman of the Board,  its Vice Chairman of the Board,  its President or one of
its Vice Presidents, under its corporate seal reproduced thereon attested by its
Secretary or one of its  Assistant  Secretaries.  The  signature of any of these
officers on the Securities may be manual or facsimile.

         Securities  bearing the manual or facsimile  signatures of  individuals
who were at any time the proper  officers of the Company shall bind the Company,
notwithstanding  that such  individuals  or any of them have ceased to hold such
offices prior to the  authentication  and delivery of such Securities or did not
hold such offices at the date of such Securities.

         At any time and from time to time after the  execution  and delivery of
this Indenture, the Company may deliver Securities of any series executed by the
Company to the Trustee for authentication, together with a Company Order for the
authentication  and delivery of such  Securities,  and the Trustee in accordance
with the Company Order shall  authenticate and deliver such  Securities.  If the
form or terms of the  Securities  of the  series  have  been  established  by or
pursuant to one or more Board  Resolutions as permitted by Sections 201 and 301,
in authenticating such Securities, and accepting the additional responsibilities
under this  Indenture  in relation  to such  Securities,  the  Trustee  shall be
entitled to receive,  and (subject to Section  601) shall be fully  protected in
relying upon, an Opinion of Counsel stating,

                  (a) if the form of such Securities has been  established by or
         pursuant to Board  Resolution  as permitted  by Section 201,  that such
         form has been  established  in conformity  with the  provisions of this
         Indenture;

                  (b) if the terms of such Securities  have been  established by
         or pursuant to Board  Resolution as permitted by Section 301, that such
         terms have been  established in conformity  with the provisions of this
         Indenture; and

                  (c) that such Securities,  when authenticated and delivered by
         the  Trustee and issued by the Company in the manner and subject to any
         conditions specified in such Opinion of Counsel,  will constitute valid
         and  legally  binding   obligations  of  the  Company   enforceable  in
         accordance  with  their  terms,  subject  to  bankruptcy,   insolvency,
         fraudulent  transfer,  reorganization,  moratorium  and similar laws of
         general applicability relating to or affecting creditors' rights and to
         general equity principles.

If such  form or terms  have  been so  established,  the  Trustee  shall  not be
required  to  authenticate  such  Securities  if the  issue  of such  Securities
pursuant to this  Indenture  will  affect the  Trustee's  own rights,  duties or
immunities  under the  Securities  and this  Indenture  or otherwise in a manner
which is not reasonably acceptable to the Trustee.



                                      -27-
<PAGE>

         Notwithstanding  the  provisions  of Section  301 and of the  preceding
paragraph,  if all Securities of a series are not to be originally issued at one
time, it shall not be necessary to deliver the Officers'  Certificate  otherwise
required  pursuant to Section  301 or the  Company  Order and Opinion of Counsel
otherwise  required  pursuant  to such  preceding  paragraph  at or prior to the
authentication  of each Security of such series if such  documents are delivered
at or prior to the  authentication  upon original issuance of the first Security
of such series to be issued.

         Each Security shall be dated the date of its authentication.

         No Security shall be entitled to any benefit under this Indenture or be
valid or  obligatory  for any purpose  unless there  appears on such  Security a
certificate  of  authentication  substantially  in the form  provided for herein
executed  by the  Trustee by manual  signature,  and such  certificate  upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has  been  duly  authenticated  and  delivered  hereunder.  Notwithstanding  the
foregoing, if any Security shall have been authenticated and delivered hereunder
but never issued and sold by the  Company,  and the Company  shall  deliver such
Security to the Trustee for  cancellation  as provided in Section  309,  for all
purposes of this  Indenture  such  Security  shall be deemed  never to have been
authenticated  and  delivered  hereunder  and  shall  never be  entitled  to the
benefits of this Indenture.

         Section 304 Temporary Securities.

         Pending the  preparation  of definitive  Securities of any series,  the
Company may execute,  and upon Company Order the Trustee shall  authenticate and
deliver,  temporary  Securities  which are printed,  lithographed,  typewritten,
mimeographed   or   otherwise   produced,   in  any   authorized   denomination,
substantially  of the tenor of the  definitive  Securities in lieu of which they
are issued and with such appropriate  insertions,  omissions,  substitutions and
other  variations as the officers  executing such  Securities may determine,  as
evidenced by their execution of such Securities.

         If  temporary  Securities  of any series are issued,  the Company  will
cause definitive  Securities of that series to be prepared without  unreasonable
delay.  After the  preparation  of  definitive  Securities  of such series,  the
temporary  Securities  of such  series  shall  be  exchangeable  for  definitive
Securities  of such series upon  surrender of the  temporary  Securities of such
series at the office or agency of the  Company  in a Place of  Payment  for that
series, without charge to the Holder. Upon surrender for cancellation of any one
or more  temporary  Securities of any series,  the Company shall execute and the
Trustee  shall  authenticate  and  deliver  in  exchange  therefor  one or  more
definitive Securities of the same series, of any authorized denominations and of
like tenor and aggregate  principal  amount.  Until so exchanged,  the temporary
Securities  of any series shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities of such series and tenor.



                                      -28-
<PAGE>

         Section 305 Registration, Registration of Transfer and Exchange.

         The Company shall cause to be kept at the Corporate Trust Office of the
Trustee a register  (the  register  maintained  in such  office and in any other
office or agency of the  Company in a Place of Payment  being  herein  sometimes
collectively  referred to as the "Security  Register") in which, subject to such
reasonable  regulations as it may  prescribe,  the Company shall provide for the
registration of Securities and of transfers of Securities. The Trustee is hereby
appointed  "Security  Registrar" for the purpose of  registering  Securities and
transfers of Securities as herein provided.

         Upon surrender for registration of transfer of any Security of a series
at the office or agency of the  Company in a Place of Payment  for that  series,
the Company shall execute,  and the Trustee shall  authenticate and deliver,  in
the name of the designated transferee or transferees, one or more new Securities
of the same  series,  of any  authorized  denominations  and of like  tenor  and
aggregate principal amount.

         At the option of the Holder,  Securities of any series may be exchanged
for other Securities of the same series, of any authorized  denominations and of
like tenor and aggregate  principal amount,  upon surrender of the Securities to
be  exchanged  at  such  office  or  agency.  Whenever  any  Securities  are  so
surrendered  for  exchange,  the Company  shall  execute,  and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

         All Securities  issued upon any registration of transfer or exchange of
Securities  shall be the valid  obligations of the Company,  evidencing the same
debt, and entitled to the same benefits under this Indenture,  as the Securities
surrendered upon such registration of transfer or exchange.

         Every Security presented or surrendered for registration of transfer or
for  exchange  shall (if so  required  by the  Company or the  Trustee)  be duly
endorsed,  or be  accompanied  by a  written  instrument  of  transfer  in  form
satisfactory  to the Company and the Security  Registrar duly  executed,  by the
Holder thereof or his attorney duly authorized in writing.

         No service  charge  shall be made for any  registration  of transfer or
exchange of Securities,  but the Company may require payment of a sum sufficient
to cover any tax or other governmental  charge that may be imposed in connection
with any  registration  of  transfer  or  exchange  of  Securities,  other  than
exchanges pursuant to Section 304, 906 or 1107 not involving any transfer.

         If the Securities of any series (or of any series and specified  tenor)
are to be redeemed  in part,  the  Company  shall not be required  (a) to issue,
register the transfer of or exchange any  Securities  of that series (or of that
series and specified tenor, as the case may be) during a period beginning at the
opening  of  business  15 days  before  the day of the  mailing  of a notice  of
redemption of any such Securities selected for redemption under Section 1103 and
ending at the close of business on the day of such  mailing,  or (b) to register
the transfer of or exchange any


                                      -29-
<PAGE>

Security so selected for  redemption in whole or in part,  except the unredeemed
portion of any Security being redeemed in part.

         The  provisions of clauses (a), (b), (c) and (d) below shall apply only
to Global Securities:

                  (a) Each Global  Security  authenticated  under this Indenture
         shall be registered in the name of the  Depositary  designated for such
         Global  Security or a nominee  thereof and delivered to such Depositary
         or a nominee  thereof  or  custodian  therefor,  and each  such  Global
         Security  shall  constitute a single  Security for all purposes of this
         Indenture.

                  (b) Notwithstanding any other provision in this Indenture,  no
         Global  Security may be  exchanged  in whole or in part for  Securities
         registered,  and no transfer  of a Global  Security in whole or in part
         may be registered,  in the name of any Person other than the Depositary
         for  such  Global  Security  or  a  nominee  thereof  unless  (i)  such
         Depositary  (A) has notified the Company that it is unwilling or unable
         to continue as Depositary for such Global Security or (B) has ceased to
         be a clearing  agency  registered  under the Exchange  Act,  (ii) there
         shall have  occurred and be continuing an Event of Default with respect
         to such Global Security or (iii) there shall exist such  circumstances,
         if  any,  in  addition  to or in  lieu of the  foregoing  as have  been
         specified for this purpose as contemplated by Section 301.

                  (c)  Subject  to Clause (2) above,  any  exchange  of a Global
         Security for other  Securities may be made in whole or in part, and all
         Securities  issued in  exchange  for a Global  Security  or any portion
         thereof shall be registered  in such names as the  Depositary  for such
         Global Security shall direct.

                  (d)  Every   Security   authenticated   and   delivered   upon
         registration of transfer of, or in exchange for or in lieu of, a Global
         Security  or any portion  thereof,  whether  pursuant to this  Section,
         Section 304, 306, 906 or 1107 or otherwise,  shall be authenticated and
         delivered in the form of, and shall be, a Global Security,  unless such
         Security  is  registered  in  the  name  of a  Person  other  than  the
         Depositary for such Global Security or a nominee thereof.

         Section 306 Mutilated, Destroyed, Lost and Stolen Securities.

         If any mutilated  Security is surrendered  to the Trustee,  the Company
shall  execute  and the  Trustee  shall  authenticate  and  deliver in  exchange
therefor a new  Security  of the same  series  and of like  tenor and  principal
amount and bearing a number not contemporaneously outstanding.

         If there shall be delivered to the Company and the Trustee (a) evidence
to their satisfaction of the destruction,  loss or theft of any Security and (b)
such  security or  indemnity as may be required by them to save each of them and
any agent of either of them  harmless,  then,  in the  absence  of notice to the
Company or the  Trustee  that such  Security  has been  acquired  by a bona fide
purchaser,  the Company  shall execute and the Trustee  shall  authenticate  and
deliver, in


                                      -30-
<PAGE>

lieu of any such destroyed,  lost or stolen Security, a new Security of the same
series  and of like  tenor  and  principal  amount  and  bearing  a  number  not
contemporaneously outstanding.

         In case any such  mutilated,  destroyed,  lost or stolen  Security  has
become or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, pay such Security.

         Upon the issuance of any new Security  under this Section,  the Company
may  require  the  payment  of a sum  sufficient  to  cover  any  tax  or  other
governmental  charge  that may be  imposed  in  relation  thereto  and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

         Every new  Security of any series  issued  pursuant to this  Section in
lieu of any  destroyed,  lost or stolen  Security  shall  constitute an original
additional contractual obligation of the Company,  whether or not the destroyed,
lost or stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all the benefits of this Indenture equally and proportionately  with
any and all other Securities of that series duly issued hereunder.

         The provisions of this Section are exclusive and shall preclude (to the
extent lawful) all other rights and remedies with respect to the  replacement or
payment of mutilated, destroyed, lost or stolen Securities.

         Section 307 Payment of Interest; Interest Rights Preserved.

         Except as  otherwise  provided  as  contemplated  by  Section  301 with
respect to any series of Securities,  interest on any Security which is payable,
and is punctually paid or duly provided for, on any Interest  Payment Date shall
be paid to the Person in whose name that  Security  (or one or more  Predecessor
Securities)  is registered  at the close of business on the Regular  Record Date
for such interest.

         Any interest on any Security of any series which is payable, but is not
punctually  paid or duly  provided  for, on any  Interest  Payment  Date (herein
called  "Defaulted  Interest") shall forthwith cease to be payable to the Holder
on the relevant  Regular  Record Date by virtue of having been such Holder,  and
such  Defaulted  Interest  may be paid by the  Company,  at its election in each
case, as provided in clause (a) or (b) below:

                  (a) The  Company  may elect to make  payment of any  Defaulted
         Interest to the Persons in whose  names the  Securities  of such series
         (or their  respective  Predecessor  Securities)  are  registered at the
         close of  business  on a Special  Record  Date for the  payment of such
         Defaulted  Interest,  which shall be fixed in the following manner. The
         Company  shall notify the Trustee in writing of the amount of Defaulted
         Interest  proposed  to be paid on each  Security of such series and the
         date of the proposed  payment,  and at the same time the Company  shall
         deposit  with the  Trustee  an amount of money  equal to the  aggregate
         amount  proposed  to be paid in respect of such  Defaulted  Interest or
         shall make  arrangements  satisfactory  to the Trustee for such deposit
         prior to the date of the


                                      -31-
<PAGE>

         proposed payment, such money when deposited to be held in trust for the
         benefit of the Persons  entitled to such Defaulted  Interest as in this
         Clause provided.  Thereupon the Trustee shall fix a Special Record Date
         for the payment of such Defaulted Interest which shall be not more than
         15 days and not  less  than 10 days  prior to the date of the  proposed
         payment  and not less than 10 days after the  receipt by the Trustee of
         the notice of the proposed  payment.  The Trustee shall promptly notify
         the  Company of such  Special  Record  Date and, in the name and at the
         expense of the Company,  shall cause notice of the proposed  payment of
         such  Defaulted  Interest  and the Special  Record Date  therefor to be
         given to each  Holder of  Securities  of such  series in the manner set
         forth in  Section  106,  not less  than 10 days  prior to such  Special
         Record Date. Notice of the proposed payment of such Defaulted  Interest
         and the  Special  Record  Date  therefor  having  been so mailed,  such
         Defaulted  Interest  shall be paid to the  Persons  in whose  names the
         Securities of such series (or their respective Predecessor  Securities)
         are registered at the close of business on such Special Record Date and
         shall no longer be payable pursuant to the following clause (b).

                  (b) The Company may make payment of any Defaulted  Interest on
         the   Securities   of  any  series  in  any  other  lawful  manner  not
         inconsistent with the requirements of any securities  exchange on which
         such Securities may be listed,  and upon such notice as may be required
         by such exchange,  if, after notice given by the Company to the Trustee
         of the proposed payment pursuant to this Clause, such manner of payment
         shall be deemed practicable by the Trustee.

         Subject to the  foregoing  provisions  of this  Section,  each Security
delivered  under this Indenture upon  registration of transfer of or in exchange
for or in lieu of any other Security shall carry the rights to interest  accrued
and unpaid, and to accrue, which were carried by such other Security.

         Section 308 Persons Deemed Owners.

         Prior to due  presentment of a Security for  registration  of transfer,
the  Company,  the Trustee and any agent of the Company or the Trustee may treat
the  Person  in whose  name such  Security  is  registered  as the owner of such
Security  for the purpose of  receiving  payment of principal of and any premium
and  (subject to Section  307) any  interest on such  Security and for all other
purposes  whatsoever,  whether or not such Security be overdue,  and neither the
Company,  the  Trustee  nor any agent of the  Company  or the  Trustee  shall be
affected by notice to the contrary.

         Section 309 Cancellation.

         All Securities  surrendered  for payment,  redemption,  registration of
transfer or exchange or for credit  against any sinking fund payment  shall,  if
surrendered  to any Person other than the  Trustee,  be delivered to the Trustee
and shall be promptly  cancelled  by it. The Company may at any time  deliver to
the  Trustee  for  cancellation  any  Securities  previously  authenticated  and
delivered   hereunder  which  the  Company  may  have  acquired  in  any  manner
whatsoever,  and may


                                      -32-
<PAGE>

deliver to the Trustee (or to any other  Person for delivery to the Trustee) for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold,  and all  Securities  so  delivered  shall be  promptly
cancelled by the Trustee.  No Securities shall be authenticated in lieu of or in
exchange for any  Securities  cancelled as provided in this  Section,  except as
expressly  permitted by this  Indenture.  All cancelled  Securities  held by the
Trustee shall be disposed of as directed by a Company Order.

         Section 310 Computation of Interest.

         Except as  otherwise  specified  as  contemplated  by  Section  301 for
Securities  of any series,  interest on the  Securities  of each series shall be
computed on the basis of a 360-day year of twelve 30-day months.

                                  ARTICLE FOUR

                           Satisfaction and Discharge

         Section 401 Satisfaction and Discharge of Indenture.

         This Indenture shall upon Company Request cease to be of further effect
(except as to any surviving  rights of  registration  of transfer or exchange of
Securities  herein expressly  provided for), and the Trustee,  at the expense of
the Company,  shall execute proper  instruments  acknowledging  satisfaction and
discharge of this Indenture, when

                  (a) either

                           (i)  all  Securities  theretofore  authenticated  and
                  delivered   (other  than  (A)   Securities   which  have  been
                  destroyed, lost or stolen and which have been replaced or paid
                  as  provided  in  Section  306 and (B)  Securities  for  whose
                  payment  money  has  theretofore  been  deposited  in trust or
                  segregated  and held in trust by the  Company  and  thereafter
                  repaid  to the  Company  or  discharged  from such  trust,  as
                  provided in Section  1003) have been  delivered to the Trustee
                  for cancellation; or

                           (ii) all such Securities not theretofore delivered to
                  the Trustee for cancellation

                           (A) have become due and payable, or

                           (B) will  become  due and  payable  at  their  Stated
                           Maturity within one year, or

                           (C) are to be called for  redemption  within one year
                           under  arrangements  satisfactory  to the Trustee for
                           the giving of notice of  redemption by the Trustee in
                           the name, and at the expense, of the Company,



                                      -33-
<PAGE>

         and the Company, in the case of (A), (B) or (C) above, has deposited or
         caused to be deposited with the Trustee as trust funds in trust for the
         purpose  money in an amount  sufficient to pay and discharge the entire
         indebtedness  on  such  Securities  not  theretofore  delivered  to the
         Trustee for cancellation, for principal and any premium and interest to
         the date of such deposit (in the case of  Securities  which have become
         due and payable) or to the Stated  Maturity or Redemption  Date, as the
         case may be;

                  (b) the  Company  has paid or caused to be paid all other sums
         payable hereunder by the Company; and

                  (c) the Company  has  delivered  to the  Trustee an  Officers'
         Certificate and an Opinion of Counsel, each stating that all conditions
         precedent   herein  provided  for  relating  to  the  satisfaction  and
         discharge of this Indenture have been complied with.

         Notwithstanding  the satisfaction and discharge of this Indenture,  the
obligations of the Company to the Trustee under Section 607, the  obligations of
the Trustee to any  Authenticating  Agent under  Section 614 and, if money shall
have been deposited with the Trustee pursuant to subclause (ii) of clause (a) of
this  Section,  the  obligations  of the Trustee  under Section 402 and the last
paragraph of Section 1003 shall survive.

         Section 402 Application of Trust Money.

         Subject to the  provisions of the last  paragraph of Section 1003,  all
money deposited with the Trustee  pursuant to Section 401 shall be held in trust
and applied by it, in accordance  with the provisions of the Securities and this
Indenture,  to  the  payment,  either  directly  or  through  any  Paying  Agent
(including  the  Company  acting as its own  Paying  Agent) as the  Trustee  may
determine, to the Persons entitled thereto, of the principal and any premium and
interest for whose payment such money has been deposited with the Trustee.

                                  ARTICLE FIVE

                                    Remedies

         Section 501 Events of Default.

         "Event of Default",  wherever used herein with respect to Securities of
any series,  means any one of the following events (whatever the reason for such
Event of Default and whether it shall be occasioned by the provisions of Article
Fourteen or be  voluntary or  involuntary  or be effected by operation of law or
pursuant  to any  judgment,  decree or order of any court or any order,  rule or
regulation of any administrative or governmental body):

                  (a) default in the payment of any  interest  upon any Security
         of that series when it becomes due and payable, and continuance of such
         default for a period of 30 days; or



                                      -34-
<PAGE>

                  (b) default in the payment of the  principal of or any premium
         on any Security of that series at its Maturity; or

                  (c) default in the deposit of any sinking fund  payment,  when
         and as due by the terms of a Security of that series; or

                  (d) default in the performance,  or breach, of any covenant or
         warranty  of the  Company in this  Indenture  (other than a covenant or
         warranty a default in whose performance or whose breach is elsewhere in
         this  Section  specifically  dealt  with or which  has  expressly  been
         included  in  this  Indenture  solely  for the  benefit  of  series  of
         Securities other than that series),  and continuance of such default or
         breach  for a  period  of 60  days  after  there  has  been  given,  by
         registered  or certified  mail, to the Company by the Trustee or to the
         Company  and the  Trustee by the  Holders of at least 25% in  principal
         amount of the  Outstanding  Securities of that series a written  notice
         specifying  such default or breach and  requiring it to be remedied and
         stating that such notice is a "Notice of Default" hereunder; or

                  (e) the entry by a court having  jurisdiction  in the premises
         of (i) a decree or order for relief in  respect  of the  Company or any
         Restricted  Subsidiary in an involuntary  case or proceeding  under any
         applicable Federal or State bankruptcy,  insolvency,  reorganization or
         other  similar law or (ii) a decree or order  adjudging  the Company or
         any such Restricted Subsidiary a bankrupt or insolvent, or approving as
         properly  filed  a  petition   seeking   reorganization,   arrangement,
         adjustment or  composition  of or in respect of the Company or any such
         Restricted  Subsidiary  under any  applicable  Federal or State law, or
         appointing  a  custodian,  receiver,  liquidator,   assignee,  trustee,
         sequestrator  or other  similar  official  of the  Company  or any such
         Restricted  Subsidiary or of any substantial  part of its property,  or
         ordering  the  winding  up or  liquidation  of  its  affairs,  and  the
         continuance  of any such  decree or order for  relief or any such other
         decree or order  unstayed and in effect for a period of 60  consecutive
         days; or

                  (f)  the   commencement  by  the  Company  or  any  Restricted
         Subsidiary  of a  voluntary  case or  proceeding  under any  applicable
         Federal  or  State  bankruptcy,  insolvency,  reorganization  or  other
         similar  law or of any other case or  proceeding  to be  adjudicated  a
         bankrupt  or  insolvent,  or the  consent  by the  Company  or any such
         Restricted  Subsidiary  to the entry of a decree or order for relief in
         respect  of  the  Company  or  any  such  Restricted  Subsidiary  in an
         involuntary  case or proceeding  under any applicable  Federal or State
         bankruptcy,  insolvency,  reorganization or other similar law or to the
         commencement of any bankruptcy or insolvency case or proceeding against
         the  Company or any such  Restricted  Subsidiary,  or the filing by the
         Company or any such  Restricted  Subsidiary  of a petition or answer or
         consent seeking  reorganization or relief under any applicable  Federal
         or State  law,  or the  consent by the  Company or any such  Restricted
         Subsidiary to the filing of such petition or to the  appointment  of or
         taking  possession  by a  custodian,  receiver,  liquidator,  assignee,
         trustee,  sequestrator or other similar  official of the Company or any
         such Restricted  Subsidiary or of any substantial  part of the property
         of the Company or any such Restricted Subsidiary,  or the making by the



                                      -35-
<PAGE>

         Company or any such  Restricted  Subsidiary  of an  assignment  for the
         benefit  of  creditors,  or the  admission  by the  Company or any such
         Restricted  Subsidiary  in  writing of its  inability  to pay its debts
         generally as they become due, or the taking of corporate  action by the
         Company or any such  Restricted  Subsidiary in  furtherance of any such
         action; or

                  (g) any  other  Event of  Default  provided  with  respect  to
         Securities of that series.

         Section 502 Acceleration of Maturity; Rescission and Annulment.

         If an Event of Default  (other  than an Event of Default  specified  in
Section  501(6) or 501(7)) with respect to  Securities of any series at the time
Outstanding occurs and is continuing, then in every such case the Trustee or the
Holders of not less than 25% in principal  amount of the Outstanding  Securities
of that series may declare the  principal  amount of all the  Securities of that
series  (or,  if any  Securities  of that  series are  Original  Issue  Discount
Securities,  such portion of the principal  amount of such  Securities as may be
specified by the terms thereof) to be due and payable  immediately,  by a notice
in writing to the Company (and to the Trustee if given by Holders), and upon any
such  declaration  such  principal  amount (or  specified  amount)  shall become
immediately due and payable.  If an Event of Default  specified in clause (e) or
(f) of  Section  501  with  respect  to  Securities  of any  series  at the time
Outstanding  occurs,  the principal  amount of all the Securities of that series
(or, if any Securities of that series are Original  Issue  Discount  Securities,
such portion of the principal  amount of such  Securities as may be specified by
the terms thereof)  shall  automatically,  and without any  declaration or other
action on the part of the  Trustee or any  Holder,  become  immediately  due and
payable.

         At any time after such a declaration  of  acceleration  with respect to
Securities  of any  series  has been made and  before a  judgment  or decree for
payment of the money due has been obtained by the Trustee as hereinafter in this
Article  provided,  the  Holders  of a  majority  in  principal  amount  of  the
Outstanding  Securities of that series, by written notice to the Company and the
Trustee, may rescind and annul such declaration and its consequences if

                  (a) the Company has paid or  deposited  with the Trustee a sum
         sufficient to pay

                           (i) all overdue  interest on all  Securities  of that
                  series,

                           (ii) the principal of (and  premium,  if any, on) any
                  Securities of that series which have become due otherwise than
                  by such  declaration of acceleration  and any interest thereon
                  at the rate or rates prescribed therefor in such Securities,

                           (iii) to the extent that payment of such  interest is
                  lawful,  interest  upon overdue  interest at the rate or rates
                  prescribed therefor in such Securities, and



                                      -36-
<PAGE>

                           (iv)  all  sums  paid  or  advanced  by  the  Trustee
                  hereunder   and   the   reasonable   compensation,   expenses,
                  disbursements  and  advances  of the  Trustee,  its agents and
                  counsel; and

                  (b) all Events of Default with respect to  Securities  of that
         series,  other than the  non-payment  of the principal of Securities of
         that  series  which  have  become  due  solely by such  declaration  of
         acceleration, have been cured or waived as provided in Section 513.

No such  rescission  shall  affect  any  subsequent  default or impair any right
consequent thereon.

The Trustee shall not be required to act upon an Event of Default  unless it has
actual knowledge of such Event of Default.

         Section 503  Collection of  Indebtedness  and Suits for  Enforcement by
Trustee.

         The Company covenants that if

                  (a)  default  is made in the  payment of any  interest  on any
         Security  when such  interest  becomes due and payable and such default
         continues for a period of 30 days, or

                  (b)  default is made in the  payment of the  principal  of (or
         premium, if any, on) any Security at the Maturity thereof,

the Company will, upon demand of the Trustee,  pay to it, for the benefit of the
Holders  of such  Securities,  the whole  amount  then due and  payable  on such
Securities  for  principal  and any premium and interest and, to the extent that
payment of such interest shall be legally  enforceable,  interest on any overdue
principal  and  premium  and on any  overdue  interest,  at the  rate  or  rates
prescribed therefor in such Securities,  and, in addition thereto,  such further
amount as shall be  sufficient  to cover the costs and  expenses of  collection,
including the reasonable compensation,  expenses,  disbursements and advances of
the Trustee, its agents and counsel.

         If an Event of Default with respect to  Securities of any series occurs
and is  continuing,  the  Trustee may in its  discretion  proceed to protect and
enforce its rights and the rights of the Holders of Securities of such series by
such appropriate  judicial  proceedings as the Trustee shall deem most effectual
to protect and enforce any such rights,  whether for the specific enforcement of
any  covenant or  agreement  in this  Indenture or in aid of the exercise of any
power granted herein, or to enforce any other proper remedy.

         Section 504 Trustee May File Proofs of Claim.

         In case of any  judicial  proceeding  relative  to the  Company (or any
other obligor upon the Securities),  its property or its creditors,  the Trustee
shall  be  entitled  and  empowered,  by  intervention  in  such  proceeding  or
otherwise,  to take any and all actions authorized under the Trust Indenture Act
in order to have  claims of the  Holders  and the  Trustee  allowed  in any such
proceeding.  In  particular,  the  Trustee  shall be  authorized  to collect and
receive any moneys or


                                      -37-
<PAGE>

other  property  payable or deliverable on any such claims and to distribute the
same; and any custodian,  receiver, assignee, trustee, liquidator,  sequestrator
or other similar official in any such judicial  proceeding is hereby  authorized
by each Holder to make such  payments to the Trustee  and, in the event that the
Trustee shall consent to the making of such payments directly to the Holders, to
pay to the Trustee any amount due it for the reasonable compensation,  expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 607.

         No provision of this Indenture shall be deemed to authorize the Trustee
to  authorize  or consent to or accept or adopt on behalf of any Holder any plan
of  reorganization,   arrangement,   adjustment  or  composition  affecting  the
Securities  or the rights of any Holder  thereof or to authorize  the Trustee to
vote in  respect of the claim of any  Holder in any such  proceeding;  provided,
however,  that the Trustee may, on behalf of the Holders,  vote for the election
of a trustee in bankruptcy  or similar  official and be a member of a creditors'
or other similar committee.

         Section  505  Trustee  May  Enforce   Claims   Without   Possession  of
Securities.

         All rights of action and claims under this  Indenture or the Securities
may be prosecuted  and enforced by the Trustee  without the possession of any of
the Securities or the production thereof in any proceeding relating thereto, and
any such  proceeding  instituted by the Trustee shall be brought in its own name
as trustee of an express  trust,  and any  recovery  of  judgment  shall,  after
provision   for  the   payment  of  the   reasonable   compensation,   expenses,
disbursements  and advances of the Trustee,  its agents and counsel,  be for the
ratable  benefit  of the  Holders  of the  Securities  in  respect of which such
judgment has been recovered.

         Section 506 Application of Money Collected.

         Any money  collected by the Trustee  pursuant to this Article  shall be
applied in the following  order,  at the date or dates fixed by the Trustee and,
in case of the distribution of such money on account of principal or any premium
or interest, upon presentation of the Securities and the notation thereon of the
payment if only partially paid and upon surrender thereof if fully paid:

         FIRST: To the payment of all amounts due the Trustee under Section 607;

         SECOND: To the extent provided in Article  Fourteen,  to the holders of
Senior Debt of the Company in accordance with Article Fourteen; and

         THIRD:  To the payment of the amounts then due and unpaid for principal
of and any premium and interest on the Securities in respect of which or for the
benefit of which such money has been collected,  ratably,  without preference or
priority  of any  kind,  according  to the  amounts  due  and  payable  on  such
Securities for principal and any premium and interest, respectively.



                                      -38-
<PAGE>

         Section 507 Limitation on Suits.

         No  Holder  of any  Security  of any  series  shall  have any  right to
institute any proceeding, judicial or otherwise, with respect to this Indenture,
or for the  appointment  of a  receiver  or  trustee,  or for any  other  remedy
hereunder, unless

                  (a) such Holder has  previously  given  written  notice to the
         Trustee of a continuing Event of Default with respect to the Securities
         of that series;

                  (b) the  Holders of not less than 25% in  principal  amount of
         the  Outstanding  Securities  of that  series  shall have made  written
         request to the  Trustee  to  institute  proceedings  in respect of such
         Event of Default in its own name as Trustee hereunder;

                  (c)  such  Holder  or  Holders  have  offered  to the  Trustee
         reasonable indemnity against the costs,  expenses and liabilities to be
         incurred in compliance with such request;

                  (d) the Trustee for 60 days after its receipt of such  notice,
         request  and  offer of  indemnity  has  failed  to  institute  any such
         proceeding; and

                  (e) no direction  inconsistent  with such written  request has
         been given to the Trustee during such 60-day period by the Holders of a
         majority in  principal  amount of the  Outstanding  Securities  of that
         series;

it being  understood and intended that no one or more of such Holders shall have
any right in any manner  whatever by virtue of, or by availing of, any provision
of this  Indenture to affect,  disturb or  prejudice  the rights of any other of
such Holders,  or to obtain or to seek to obtain priority or preference over any
other of such  Holders or to enforce any right under this  Indenture,  except in
the manner herein  provided and for the equal and ratable benefit of all of such
Holders.

         Section  508  Unconditional  Right of  Holders  to  Receive  Principal,
Premium and Interest.

         Notwithstanding  any other provision in this  Indenture,  the Holder of
any  Security  shall have the right,  which is absolute  and  unconditional,  to
receive payment of the principal of and any premium and (subject to Section 307)
interest on such Security on the respective Stated Maturities  expressed in such
Security  (or,  in the  case  of  redemption,  on the  Redemption  Date)  and to
institute suit for the  enforcement  of any such payment,  and such rights shall
not be impaired without the consent of such Holder.

         Section 509 Restoration of Rights and Remedies.

         If the Trustee or any Holder has  instituted  any proceeding to enforce
any  right  or  remedy  under  this  Indenture  and  such  proceeding  has  been
discontinued or abandoned for any reason,  or has been  determined  adversely to
the  Trustee or to such  Holder,  then and in every  such  case,  subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
be restored  severally and respectively to their former positions  hereunder and
thereafter all rights


                                      -39-
<PAGE>

and  remedies of the Trustee  and the Holders  shall  continue as though no such
proceeding had been instituted.

         Section 510 Rights and Remedies Cumulative.

         Except as otherwise provided with respect to the replacement or payment
of mutilated,  destroyed,  lost or stolen  Securities  in the last  paragraph of
Section 306, no right or remedy herein conferred upon or reserved to the Trustee
or to the Holders is intended to be exclusive of any other right or remedy,  and
every right and remedy shall, to the extent  permitted by law, be cumulative and
in addition to every other right and remedy given  hereunder or now or hereafter
existing at law or in equity or  otherwise.  The  assertion or employment of any
right or remedy  hereunder,  or  otherwise,  shall not  prevent  the  concurrent
assertion or employment of any other appropriate right or remedy.

         Section 511 Delay or Omission Not Waiver.

         No delay or omission of the Trustee or of any Holder of any  Securities
to exercise any right or remedy  accruing upon any Event of Default shall impair
any such right or remedy or  constitute a waiver of any such Event of Default or
an acquiescence therein.  Every right and remedy given by this Article or by law
to the  Trustee or to the  Holders may be  exercised  from time to time,  and as
often as may be deemed expedient,  by the Trustee or by the Holders, as the case
may be.

         Section 512 Control by Holders.

         The  Holders  of a  majority  in  principal  amount of the  Outstanding
Securities  of any series  shall  have the right to direct the time,  method and
place of conducting any proceeding for any remedy  available to the Trustee,  or
exercising  any trust or power  conferred  on the  Trustee,  with respect to the
Securities of such series, provided that

                  (a) such  direction  shall not be in conflict with any rule of
         law or with this Indenture, and

                  (b) the Trustee may take any other action deemed proper by the
         Trustee which is not inconsistent with such direction.

         Section 513 Waiver of Past Defaults.

         The  Holders of not less than a  majority  in  principal  amount of the
Outstanding  Securities  of any series  may on behalf of the  Holders of all the
Securities of such series waive any past default  hereunder with respect to such
series and its consequences, except a default

                  (a) in the  payment  of the  principal  of or any  premium  or
         interest on any Security of such series, or



                                      -40-
<PAGE>

                  (b) in respect of a covenant or  provision  hereof which under
         Article  Nine cannot be modified or amended  without the consent of the
         Holder of each Outstanding Security of such series affected.

         Upon any such waiver,  such default shall cease to exist, and any Event
of  Default  arising  therefrom  shall be deemed to have been  cured,  for every
purpose of this Indenture;  but no such waiver shall extend to any subsequent or
other default or impair any right consequent thereon.

         Section 514 Undertaking for Costs.

         In any suit for the  enforcement  of any  right or  remedy  under  this
Indenture,  or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an  undertaking to pay the costs of such suit, and may assess costs against
any such party  litigant,  in the manner and to the extent provided in the Trust
Indenture  Act;  provided that neither this Section nor the Trust  Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company.

         Section 515 Waiver of Usury, Stay or Extension Laws.

         The Company  covenants  (to the extent that it may lawfully do so) that
it will not at any time insist upon, or plead, or in any manner whatsoever claim
or take the benefit or advantage  of, any usury,  stay or extension law wherever
enacted,  now or at any time hereafter in force,  which may affect the covenants
or the performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such law
and  covenants  that it will not hinder,  delay or impede the  execution  of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                                  ARTICLE SIX

                                   The Trustee

         Section 601 Certain Duties and Responsibilities.

         The duties and  responsibilities of the Trustee shall be as provided by
the Trust  Indenture Act.  Notwithstanding  the foregoing,  no provision of this
Indenture shall require the Trustee to expend or risk its own funds or otherwise
incur any financial liability in the performance of any of its duties hereunder,
or in the exercise of any of its rights or powers,  if it shall have  reasonable
grounds for believing that repayment of such funds or adequate indemnity against
such risk or liability is not  reasonably  assured to it. Whether or not therein
expressly so provided, every provision of this Indenture relating to the conduct
or affecting  the  liability of or affording  protection to the Trustee shall be
subject to the provisions of this Section.



                                      -41-
<PAGE>

         Section 602 Notice of Defaults.

         If a default occurs hereunder with respect to Securities of any series,
the Trustee  shall give the Holders of  Securities of such series notice of such
default as and to the extent  provided  by the Trust  Indenture  Act;  provided,
however,  that in the case of any default of the  character  specified in clause
(d) of Section 501 with respect to Securities of such series,  no such notice to
Holders shall be given until at least 30 days after the occurrence thereof.  For
the purpose of this  Section,  the term  "default"  means any event which is, or
after  notice or lapse of time or both would  become,  an Event of Default  with
respect to Securities of such series.

         Section 603 Certain Rights of Trustee.

         Subject to the provisions of Section 601:

                  (a) the Trustee may rely and shall be  protected  in acting or
         refraining  from acting upon any  resolution,  certificate,  statement,
         instrument,  opinion,  report,  notice,  request,  direction,  consent,
         order, bond,  debenture,  note, other evidence of indebtedness or other
         paper or document  believed by it to be genuine and to have been signed
         or presented by the proper party or parties;

                  (b) any request or direction of the Company  mentioned  herein
         shall be sufficiently  evidenced by a Company Request or Company Order,
         and any  resolution  of the Board of  Directors  shall be  sufficiently
         evidenced by a Board Resolution;

                  (c)  whenever  in the  administration  of this  Indenture  the
         Trustee shall deem it desirable  that a matter be proved or established
         prior to  taking,  suffering  or  omitting  any action  hereunder,  the
         Trustee (unless other evidence be herein specifically  prescribed) may,
         in the  absence  of bad  faith  on its  part,  rely  upon an  Officers'
         Certificate;

                  (d) the  Trustee  may  consult  with  counsel  and the written
         advice of such  counsel or any  Opinion  of  Counsel  shall be full and
         complete  authorization  and protection in respect of any action taken,
         suffered  or omitted  by it  hereunder  in good  faith and in  reliance
         thereon;

                  (e) the Trustee  shall be under no  obligation to exercise any
         of the rights or powers  vested in it by this  Indenture at the request
         or direction of any of the Holders  pursuant to this Indenture,  unless
         such Holders shall have offered to the Trustee  reasonable  security or
         indemnity  against the costs,  expenses and liabilities  which might be
         incurred by it in compliance with such request or direction;

                  (f) the Trustee  shall not be bound to make any  investigation
         into the  facts  or  matters  stated  in any  resolution,  certificate,
         statement,  instrument,  opinion,  report, notice, request,  direction,
         consent,  order, bond, debenture,  note, other evidence of indebtedness
         or other paper or document,  but the Trustee,  in its  discretion,  may
         make such further inquiry or  investigation  into such facts or matters
         as it may see fit,  and, if the Trustee  shall  determine  to make such
         further inquiry or  investigation,  it shall be entitled to


                                      -42-
<PAGE>

         examine the books,  records and premises of the Company,  personally or
         by agent or attorney; and

                  (g) the  Trustee  may  execute  any of the  trusts  or  powers
         hereunder  or perform  any duties  hereunder  either  directly or by or
         through  agents or attorneys and the Trustee  shall not be  responsible
         for any  misconduct  or negligence on the part of any agent or attorney
         appointed with due care by it hereunder.

         Section 604 Not Responsible for Recitals or Issuance of Securities.

         The  recitals  contained  herein  and in  the  Securities,  except  the
Trustee's  certificates of  authentication,  shall be taken as the statements of
the Company,  and neither the Trustee nor any  Authenticating  Agent assumes any
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Indenture or of the Securities.  Neither the
Trustee  nor  any  Authenticating  Agent  shall  be  accountable  for the use or
application by the Company of Securities or the proceeds thereof.

         Section 605 May Hold Securities.

         The Trustee,  any Authenticating  Agent, any Paying Agent, any Security
Registrar  or any other agent of the  Company,  in its  individual  or any other
capacity, may become the owner or pledgee of Securities and, subject to Sections
608 and 613, may  otherwise  deal with the Company with the same rights it would
have if it were  not  Trustee,  Authenticating  Agent,  Paying  Agent,  Security
Registrar or such other agent.

         Section 606 Money Held in Trust.

         Money held by the  Trustee in trust  hereunder  need not be  segregated
from other  funds  except to the extent  required by law.  The Trustee  shall be
under no liability for interest on any money received by it hereunder  except as
otherwise agreed with the Company.

         Section 607 Compensation and Reimbursement.

         The Company agrees

                  (1) to pay  to  the  Trustee  from  time  to  time  reasonable
         compensation   for  all  services   rendered  by  it  hereunder  (which
         compensation  shall not be limited by any provision of law in regard to
         the compensation of a trustee of an express trust);

                  (2)  except  as  otherwise   expressly   provided  herein,  to
         reimburse  the Trustee  upon its request for all  reasonable  expenses,
         disbursements   and  advances  incurred  or  made  by  the  Trustee  in
         accordance  with  any  provision  of  this  Indenture   (including  the
         reasonable  compensation  and the  expenses  and  disbursements  of its
         agents and counsel),  except any such expense,  disbursement or advance
         as may be attributable to its negligence or bad faith; and



                                      -43-
<PAGE>

                  (3) to  indemnify  the  Trustee  for,  and to hold it harmless
         against,  any loss, liability or expense incurred without negligence or
         bad  faith  on its  part,  arising  out of or in  connection  with  the
         acceptance  or   administration  of  the  trust  or  trusts  hereunder,
         including the costs and expenses of defending  itself against any claim
         or liability in connection  with the exercise or  performance of any of
         its powers or duties hereunder.

         Section 608 Conflicting Interests.

         If the Trustee has or shall acquire a conflicting  interest  within the
meaning of the Trust  Indenture  Act, the Trustee  shall either  eliminate  such
interest or resign,  to the extent and in the manner provided by, and subject to
the provisions  of, the Trust  Indenture Act and this  Indenture.  To the extent
permitted  by such Act,  the Trustee  shall not be deemed to have a  conflicting
interest  by virtue of being a trustee  under  this  Indenture  with  respect to
Securities  of more than one series  [or a trustee  under -- list here any prior
indentures  between the Company and the Trustee that have not been satisfied and
discharged  and that may be excluded by the proviso to Section  310(b)(1) of the
Trust Indenture Act].

         Section 609 Corporate Trustee Required; Eligibility.

         There shall at all times be one (and only one) Trustee  hereunder  with
respect to the  Securities  of each series,  which may be Trustee  hereunder for
Securities of one or more other  series.  Each Trustee shall be a Person that is
eligible  pursuant to the Trust Indenture Act to act as such, and has a combined
capital and surplus of at least  $50,000,000  and has its Corporate Trust Office
in the Borough of Manhattan,  The City of New York. If any such Person publishes
reports of condition at least annually,  pursuant to law or to the  requirements
of its supervising or examining authority, then for the purposes of this Section
and to the extent permitted by the Trust Indenture Act, the combined capital and
surplus of such Person shall be deemed to be its combined capital and surplus as
set forth in its most recent  report of condition so  published.  If at any time
the  Trustee  with  respect to the  Securities  of any series  shall cease to be
eligible in accordance  with the  provisions  of this  Section,  it shall resign
immediately  in the  manner and with the effect  hereinafter  specified  in this
Article.

         Section 610 Resignation and Removal; Appointment of Successor.

         No  resignation  or  removal of the  Trustee  and no  appointment  of a
successor  Trustee  pursuant to this Article  shall become  effective  until the
acceptance  of  appointment  by the  successor  Trustee in  accordance  with the
applicable requirements of Section 611.

         The Trustee may resign at any time with  respect to the  Securities  of
one or more  series by giving  written  notice  thereof to the  Company.  If the
instrument of acceptance  by a successor  Trustee  required by Section 611 shall
not have been  delivered to the Trustee  within 30 days after the giving of such
notice of resignation, the resigning Trustee may petition any court of competent
jurisdiction  for the  appointment  of a successor  Trustee  with respect to the
Securities of such series.



                                      -44-
<PAGE>

         The Trustee may be removed at any time with  respect to the  Securities
of any series by Act of the  Holders of a majority  in  principal  amount of the
Outstanding  Securities  of such  series,  delivered  to the  Trustee and to the
Company.

         If at any time:

                  (1) the Trustee  shall fail to comply  with  Section 608 after
         written request therefor by the Company or by any Holder who has been a
         bona fide Holder of a Security for at least six months, or

                  (2) the Trustee  shall cease to be eligible  under Section 609
         and shall fail to resign after written request  therefor by the Company
         or by any such Holder, or

                  (3) the Trustee  shall become  incapable of acting or shall be
         adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
         property  shall be appointed or any public officer shall take charge or
         control of the Trustee or of its property or affairs for the purpose of
         rehabilitation, conservation or liquidation,

then,  in any such case,  (A) the Company by a Board  Resolution  may remove the
Trustee  with  respect to all  Securities,  or (B) subject to Section  514,  any
Holder  who has been a bona fide  Holder of a  Security  for at least six months
may, on behalf of himself and all others similarly situated,  petition any court
of  competent  jurisdiction  for the removal of the Trustee  with respect to all
Securities and the appointment of a successor Trustee or Trustees.

         If the Trustee shall resign,  be removed or become incapable of acting,
or if a vacancy shall occur in the office of Trustee for any cause, with respect
to the  Securities of one or more series,  the Company,  by a Board  Resolution,
shall  promptly  appoint a  successor  Trustee or Trustees  with  respect to the
Securities of that or those series (it being  understood that any such successor
Trustee may be appointed with respect to the Securities of one or more or all of
such series and that at any time there shall be only one Trustee with respect to
the  Securities of any  particular  series) and shall comply with the applicable
requirements of Section 611. If, within one year after such resignation, removal
or  incapability,  or the occurrence of such vacancy,  a successor  Trustee with
respect to the Securities of any series shall be appointed by Act of the Holders
of a majority in principal  amount of the Outstanding  Securities of such series
delivered  to the Company and the retiring  Trustee,  the  successor  Trustee so
appointed shall, forthwith upon its acceptance of such appointment in accordance
with the applicable  requirements of Section 611,  become the successor  Trustee
with respect to the  Securities of such series and to that extent  supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the  Securities  of any series shall have been so appointed by the Company or
the Holders and accepted  appointment in the manner required by Section 611, any
Holder who has been a bona fide Holder of a Security of such series for at least
six months may, on behalf of himself and all others similarly situated, petition
any court of competent  jurisdiction for the appointment of a successor  Trustee
with respect to the Securities of such series.



                                      -45-
<PAGE>

         The Company shall give notice of each  resignation  and each removal of
the Trustee with respect to the Securities of any series and each appointment of
a successor  Trustee with respect to the Securities of any series to all Holders
of Securities of such series in the manner  provided in Section 106. Each notice
shall include the name of the successor  Trustee with respect to the  Securities
of such series and the address of its Corporate Trust Office.

         Section 611 Acceptance of Appointment by Successor.

         In  case of the  appointment  hereunder  of a  successor  Trustee  with
respect to all  Securities,  every such  successor  Trustee so  appointed  shall
execute,  acknowledge and deliver to the Company and to the retiring  Trustee an
instrument accepting such appointment,  and thereupon the resignation or removal
of the retiring  Trustee  shall become  effective  and such  successor  Trustee,
without any further act,  deed or  conveyance,  shall become vested with all the
rights,  powers,  trusts and duties of the retiring Trustee; but, on the request
of the Company or the successor  Trustee,  such  retiring  Trustee  shall,  upon
payment of its charges,  execute and deliver an instrument  transferring to such
successor Trustee all the rights,  powers and trusts of the retiring Trustee and
shall duly assign,  transfer and deliver to such successor  Trustee all property
and money held by such retiring Trustee hereunder.

         In  case of the  appointment  hereunder  of a  successor  Trustee  with
respect to the Securities of one or more (but not all) series, the Company,  the
retiring  Trustee and each  successor  Trustee with respect to the Securities of
one or more series shall  execute and deliver an indenture  supplemental  hereto
wherein each successor Trustee shall accept such appointment and which (a) shall
contain  such  provisions  as shall be  necessary  or  desirable to transfer and
confirm to, and to vest in,  each  successor  Trustee  all the  rights,  powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series to which the appointment of such successor Trustee relates,  (b)
if the retiring  Trustee is not retiring with respect to all  Securities,  shall
contain  such  provisions  as shall be deemed  necessary or desirable to confirm
that all the rights,  powers,  trusts and duties of the  retiring  Trustee  with
respect  to the  Securities  of that or those  series as to which  the  retiring
Trustee is not retiring shall continue to be vested in the retiring Trustee, and
(c) shall add to or change any of the  provisions of this  Indenture as shall be
necessary  to  provide  for or  facilitate  the  administration  of  the  trusts
hereunder by more than one Trustee,  it being  understood that nothing herein or
in such supplemental indenture shall constitute such Trustees co-trustees of the
same  trust and that each such  Trustee  shall be  trustee  of a trust or trusts
hereunder separate and apart from any trust or trusts hereunder  administered by
any other such Trustee; and upon the execution and delivery of such supplemental
indenture  the  resignation  or removal of the  retiring  Trustee  shall  become
effective  to the  extent  provided  therein  and each such  successor  Trustee,
without any further act,  deed or  conveyance,  shall become vested with all the
rights,  powers,  trusts and duties of the retiring  Trustee with respect to the
Securities of that or those series to which the  appointment  of such  successor
Trustee relates;  but, on request of the Company or any successor Trustee,  such
retiring  Trustee  shall duly  assign,  transfer  and deliver to such  successor
Trustee all  property and money held by such  retiring  Trustee  hereunder  with
respect to the  Securities of that or those series to which the  appointment  of
such successor Trustee relates.



                                      -46-
<PAGE>

         Upon request of any such successor  Trustee,  the Company shall execute
any and all instruments  for more fully and certainly  vesting in and confirming
to such successor Trustee all such rights,  powers and trusts referred to in the
first or second preceding paragraph, as the case may be.

         No successor Trustee shall accept its appointment unless at the time of
such  acceptance  such  successor  Trustee shall be qualified and eligible under
this Article.

         Section  612  Merger,   Conversion,   Consolidation  or  Succession  to
Business.

         Any  corporation  into which the Trustee may be merged or  converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion  or  consolidation  to which  the  Trustee  shall be a party,  or any
corporation  succeeding to all or substantially all the corporate trust business
of the Trustee,  shall be the successor of the Trustee hereunder,  provided such
corporation  shall be  otherwise  qualified  and  eligible  under this  Article,
without the  execution  or filing of any paper or any further act on the part of
any of the parties hereto. In case any Securities shall have been authenticated,
but not  delivered,  by the Trustee  then in office,  any  successor  by merger,
conversion  or  consolidation  to such  authenticating  Trustee  may adopt  such
authentication  and deliver the Securities so authenticated with the same effect
as if such successor Trustee had itself authenticated such Securities.

         Section 613 Preferential Collection of Claims Against Company.

         If and when the  Trustee  shall be or become a creditor  of the Company
(or any other obligor upon the Securities),  the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims against
the Company (or any such other obligor).

         Section 614 Appointment of Authenticating Agent.

         The Trustee may appoint an Authenticating  Agent or Agents with respect
to one or more series of  Securities  which shall be authorized to act on behalf
of the Trustee to  authenticate  Securities  of such series issued upon original
issue and upon exchange,  registration of transfer or partial redemption thereof
or pursuant to Section 306, and Securities so authenticated shall be entitled to
the  benefits  of this  Indenture  and  shall be valid  and  obligatory  for all
purposes as if authenticated  by the Trustee  hereunder.  Wherever  reference is
made in this Indenture to the  authentication  and delivery of Securities by the
Trustee or the Trustee's certificate of authentication,  such reference shall be
deemed to include  authentication  and  delivery  on behalf of the Trustee by an
Authenticating  Agent and a certificate of authentication  executed on behalf of
the  Trustee by an  Authenticating  Agent.  Each  Authenticating  Agent shall be
acceptable to the Company and shall at all times be a corporation  organized and
doing business under the laws of the United States of America, any State thereof
or the District of Columbia, authorized under such laws to act as Authenticating
Agent,  having a combined  capital and surplus of not less than  $50,000,000 and
subject to supervision or  examination  by Federal or State  authority.  If such
Authenticating Agent publishes reports of condition at least annually,  pursuant
to law or to the requirements of said supervising or examining  authority,  then
for the  purposes  of this  Section,


                                      -47-
<PAGE>

the combined capital and surplus of such Authenticating Agent shall be deemed to
be its  combined  capital and surplus as set forth in its most recent  report of
condition so published. If at any time an Authenticating Agent shall cease to be
eligible in accordance with the provisions of this Section,  such Authenticating
Agent shall resign  immediately  in the manner and with the effect  specified in
this Section.

         Any  corporation  into which an  Authenticating  Agent may be merged or
converted or with which it may be  consolidated,  or any  corporation  resulting
from any merger,  conversion or consolidation to which such Authenticating Agent
shall be a party,  or any  corporation  succeeding  to the  corporate  agency or
corporate  trust business of an  Authenticating  Agent,  shall continue to be an
Authenticating  Agent,  provided such  corporation  shall be otherwise  eligible
under this Section,  without the execution or filing of any paper or any further
act on the part of the Trustee or the Authenticating Agent.

         An Authenticating Agent may resign at any time by giving written notice
thereof to the Trustee and to the Company. The Trustee may at any time terminate
the agency of an  Authenticating  Agent by giving written notice thereof to such
Authenticating  Agent  and to the  Company.  Upon  receiving  such a  notice  of
resignation  or  upon  such  a  termination,   or  in  case  at  any  time  such
Authenticating  Agent  shall  cease  to  be  eligible  in  accordance  with  the
provisions of this Section,  the Trustee may appoint a successor  Authenticating
Agent  which  shall be  acceptable  to the Company and shall give notice of such
appointment  in the manner  provided in Section 106 to all Holders of Securities
of the series with respect to which such  Authenticating  Agent will serve.  Any
successor  Authenticating  Agent upon  acceptance of its  appointment  hereunder
shall become  vested with all the rights,  powers and duties of its  predecessor
hereunder,  with like effect as if originally named as an Authenticating  Agent.
No successor  Authenticating  Agent shall be appointed unless eligible under the
provisions of this Section.

         The  Trustee  agrees to pay to each  Authenticating  Agent from time to
time  reasonable  compensation  for its  services  under this  Section,  and the
Trustee shall be entitled to be  reimbursed  for such  payments,  subject to the
provisions of Section 607.

         If an  appointment  with respect to one or more series is made pursuant
to this Section,  the  Securities of such series may have endorsed  thereon,  in
addition  to  the  Trustee's  certificate  of  authentication,   an  alternative
certificate of authentication in the following form:



                                      -48-
<PAGE>

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                                             ..................................,
                                                                      As Trustee



                                             By................................,
                                                         As Authenticating Agent



                                             By.................................
                                                              Authorized Officer



                                 ARTICLE SEVEN

                Holders' Lists and Reports by Trustee and Company

         Section 701 Company to Furnish Trustee Names and Addresses of Holders.

         The Company will furnish or cause to be furnished to the Trustee

                  (a)  semi-annually,  not later than  January 15 and July 15 in
         each year, a list, in such form as the Trustee may reasonably  require,
         of the names and  addresses of the Holders of Securities of each series
         as of the preceding December 31 or June 30, as the case may be, and

                  (b) at such other times as the Trustee may request in writing,
         within 30 days after the receipt by the Company of any such request,  a
         list of  similar  form and  content  as of a date not more than 15 days
         prior to the time such list is furnished;

excluding from any such list names and addresses  received by the Trustee in its
capacity as Security Registrar.

         Section 702 Preservation of Information; Communications to Holders.

         The  Trustee  shall  preserve,  in as  current a form as is  reasonably
practicable,  the names and  addresses  of Holders  contained in the most recent
list  furnished  to the  Trustee as  provided  in Section  701 and the names and
addresses  of Holders  received  by the  Trustee  in its  capacity  as  Security
Registrar.  The  Trustee may  destroy  any list  furnished  to it as provided in
Section 701 upon receipt of a new list so furnished.



                                      -49-
<PAGE>

         The rights of Holders to communicate with other Holders with respect to
their rights under this Indenture or under the Securities, and the corresponding
rights  and  privileges  of the  Trustee,  shall  be as  provided  by the  Trust
Indenture Act.

         Every Holder of Securities,  by receiving and holding the same,  agrees
with the Company and the  Trustee  that  neither the Company nor the Trustee nor
any  agent  of  either  of them  shall  be held  accountable  by  reason  of any
disclosure of  information as to names and addresses of Holders made pursuant to
the Trust Indenture Act.

         Section 703 Reports by Trustee.

         The Trustee  shall  transmit to Holders  such  reports  concerning  the
Trustee and its actions under this Indenture as may be required  pursuant to the
Trust Indenture Act at the times and in the manner provided pursuant thereto.

         A copy of each such report shall,  at the time of such  transmission to
Holders,  be filed by the  Trustee  with  each  stock  exchange  upon  which any
Securities are listed,  with the  Commission  and with the Company.  The Company
will notify the Trustee when any Securities are listed on any stock exchange.

         Section 704 Reports by Company.

         The  Company  shall  file  with the  Trustee  and the  Commission,  and
transmit to Holders,  such  information,  documents and other reports,  and such
summaries thereof, as may be required pursuant to the Trust Indenture Act at the
times and in the manner  provided  pursuant to such Act;  provided that any such
information,  documents  or reports  required  to be filed  with the  Commission
pursuant  to  Section  13 or 15(d) of the  Exchange  Act shall be filed with the
Trustee  within  15 days  after  the same is so  required  to be filed  with the
Commission.

                                 ARTICLE EIGHT

              Consolidation, Merger, Conveyance, Transfer or Lease

         Section 801 Company May Consolidate, Etc., Only on Certain Terms.

         The Company shall not  consolidate  with or merge into any other Person
or convey,  transfer  or lease its  properties  and assets  substantially  as an
entirety  to any  Person,  and the  Company  shall  not  permit  any  Person  to
consolidate  with or merge into the  Company or  convey,  transfer  or lease its
properties and assets substantially as an entirety to the Company, unless:

                  (a) in case the Company shall  consolidate  with or merge into
         another  Person or convey,  transfer or lease its properties and assets
         substantially  as an entirety to any Person,  the Person formed by such
         consolidation  or into which the Company is merged or the Person  which
         acquires by conveyance or transfer, or which leases, the properties and
         assets  of  the  Company  substantially  as  an  entirety  shall  be  a
         corporation,  partnership, limited liability company or trust, shall be
         organized and validly  existing  under the laws


                                      -50-
<PAGE>

         of the United  States of America,  any State thereof or the District of
         Columbia  and shall  expressly  assume,  by an  indenture  supplemental
         hereto,  executed and delivered to the Trustee, in form satisfactory to
         the Trustee,  the due and punctual  payment of the principal of and any
         premium  and  interest on all the  Securities  and the  performance  or
         observance  of  every  covenant  of this  Indenture  on the part of the
         Company to be performed or observed;

                  (b)  immediately  after giving effect to such  transaction and
         treating any indebtedness which becomes an obligation of the Company or
         any Subsidiary as a result of such  transaction as having been incurred
         by the Company or such Subsidiary at the time of such  transaction,  no
         Event of Default,  and no event which, after notice or lapse of time or
         both,  would  become an Event of Default,  shall have  happened  and be
         continuing;

                  (c) if,  as a result  of any such  consolidation  or merger or
         such conveyance, transfer or lease, properties or assets of the Company
         would become subject to a mortgage,  pledge, lien, security interest or
         other encumbrance  which would not be permitted by this Indenture,  the
         Company or such successor  Person,  as the case may be, shall take such
         steps  as shall be  necessary  effectively  to  secure  the  Securities
         equally  and  ratably  with  (or  prior  to) all  indebtedness  secured
         thereby; and

                  (d) the Company  has  delivered  to the  Trustee an  Officers'
         Certificate  and  an  Opinion  of  Counsel,   each  stating  that  such
         consolidation,   merger,  conveyance,  transfer  or  lease  and,  if  a
         supplemental indenture is required in connection with such transaction,
         such  supplemental  indenture  comply  with this  Article  and that all
         conditions  precedent  herein provided for relating to such transaction
         have been complied with.

         Section 802 Successor Substituted.

         Upon any  consolidation  of the Company  with, or merger of the Company
into,  any other Person or any  conveyance,  transfer or lease of the properties
and assets of the  Company  substantially  as an  entirety  in  accordance  with
Section 801, the successor Person formed by such consolidation or into which the
Company is merged or to which such  conveyance,  transfer or lease is made shall
succeed to, and be  substituted  for, and may exercise every right and power of,
the  Company  under this  Indenture  with the same  effect as if such  successor
Person had been named as the Company herein, and thereafter,  except in the case
of a lease,  the  predecessor  Person shall be relieved of all  obligations  and
covenants under this Indenture and the Securities.

                                  ARTICLE NINE

                             Supplemental Indentures

         Section 901 Supplemental Indentures Without Consent of Holders.

         Without the consent of any Holders,  the Company,  when authorized by a
Board Resolution,  and the Trustee, at any time and from time to time, may enter
into one or more


                                      -51-
<PAGE>

indentures  supplemental hereto, in form satisfactory to the Trustee, for any of
the following purposes:

                  (a) to  evidence  the  succession  of  another  Person  to the
         Company and the  assumption  by any such  successor of the covenants of
         the Company herein and in the Securities; or

                  (b) to add to the  covenants of the Company for the benefit of
         the Holders of all or any series of Securities  (and if such  covenants
         are to be for the  benefit  of less  than  all  series  of  Securities,
         stating that such covenants are expressly being included solely for the
         benefit  of such  series)  or to  surrender  any right or power  herein
         conferred upon the Company; or

                  (c) to add any additional Events of Default for the benefit of
         the Holders of all or any series of Securities  (and if such additional
         Events of Default  are to be for the benefit of less than all series of
         Securities,   stating  that  such  additional  Events  of  Default  are
         expressly being included solely for the benefit of such series); or

                  (d)  to add  to or  change  any  of  the  provisions  of  this
         Indenture to such extent as shall be necessary to permit or  facilitate
         the  issuance  of  Securities  in  bearer  form,   registrable  or  not
         registrable as to principal,  and with or without interest coupons,  or
         to permit or facilitate  the issuance of  Securities in  uncertificated
         form; or

                  (e) to add to,  change or eliminate  any of the  provisions of
         this Indenture in respect of one or more series of Securities, provided
         that any such  addition,  change or  elimination  (i) shall neither (A)
         apply to any Security of any series  created  prior to the execution of
         such  supplemental  indenture  and  entitled  to the  benefit  of  such
         provision  nor (B) modify the rights of the Holder of any such Security
         with respect to such provision or (ii) shall become effective only when
         there is no such Security Outstanding; or

                  (f) to establish the form or terms of Securities of any series
         as permitted by Sections 201 and 301; or

                  (g) to evidence and provide for the  acceptance of appointment
         hereunder by a successor  Trustee with respect to the Securities of one
         or more  series and to add to or change any of the  provisions  of this
         Indenture  as shall be  necessary  to  provide  for or  facilitate  the
         administration  of the  trusts  hereunder  by more  than  one  Trustee,
         pursuant to the requirements of Section 611; or

                  (h) to cure  any  ambiguity,  to  correct  or  supplement  any
         provision herein which may be defective or inconsistent  with any other
         provision  herein,  or to make any other  provisions  with  respect  to
         matters or questions  arising under this Indenture,  provided that such
         action  pursuant  to this  clause  (h) shall not  adversely  affect the
         interests  of the Holders of  Securities  of any series in any material
         respect.



                                      -52-
<PAGE>

         Section 902 Supplemental Indentures With Consent of Holders.

         With  the  consent  of the  Holders  of not  less  than a  majority  in
principal  amount of the Outstanding  Securities of each series affected by such
supplemental  indenture, by Act of said Holders delivered to the Company and the
Trustee, the Company, when authorized by a Board Resolution, and the Trustee may
enter into an indenture  or  indentures  supplemental  hereto for the purpose of
adding any  provisions  to or changing in any manner or  eliminating  any of the
provisions  of this  Indenture  or of  modifying in any manner the rights of the
Holders of Securities of such series under this  Indenture;  provided,  however,
that no such supplemental  indenture shall, without the consent of the Holder of
each Outstanding Security affected thereby,

                  (a) change the Stated  Maturity  of the  principal  of, or any
         installment of principal of or interest on, any Security, or reduce the
         principal amount thereof or the rate of interest thereon or any premium
         payable  upon the  redemption  thereof,  or  reduce  the  amount of the
         principal of an Original Issue Discount  Security or any other Security
         which would be due and payable upon a declaration  of  acceleration  of
         the  Maturity  thereof  pursuant to Section 502, or change any Place of
         Payment  where,  or the coin or currency in which,  any Security or any
         premium  or  interest  thereon  is  payable,  or  impair  the  right to
         institute suit for the  enforcement of any such payment on or after the
         Stated Maturity thereof (or, in the case of redemption, on or after the
         Redemption  Date),  or modify the  provisions  of this  Indenture  with
         respect to the  subordination of the Securities in a manner  materially
         adverse to the Holders, or

                  (b)  reduce  the   percentage  in  principal   amount  of  the
         Outstanding  Securities of any series,  the consent of whose Holders is
         required for any such supplemental  indenture,  or the consent of whose
         Holders  is  required  for  any  waiver  (of  compliance  with  certain
         provisions of this  Indenture or certain  defaults  hereunder and their
         consequences) provided for in this Indenture, or

                  (c) modify any of the provisions of this Section,  Section 513
         or Section 1009,  except to increase any such  percentage or to provide
         that certain other  provisions of this Indenture  cannot be modified or
         waived without the consent of the Holder of each  Outstanding  Security
         affected  thereby;  provided,  however,  that this clause  shall not be
         deemed to require the consent of any Holder with  respect to changes in
         the references to "the Trustee" and concomitant changes in this Section
         and Section 1009, or the deletion of this proviso,  in accordance  with
         the requirements of Section 611 and clause (h) of Section 901.

A  supplemental  indenture  which  changes or  eliminates  any covenant or other
provision of this  Indenture  which has expressly  been included  solely for the
benefit of one or more  particular  series of Securities,  or which modifies the
rights of the Holders of Securities of such series with respect to such covenant
or other  provision,  shall be  deemed  not to  affect  the  rights  under  this
Indenture of the Holders of Securities of any other series.



                                      -53-
<PAGE>

         It shall not be necessary  for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

         Section 903 Execution of Supplemental Indentures.

         In  executing,  or  accepting  the  additional  trusts  created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture,  the Trustee shall be entitled to receive,
and  (subject  to Section  601) shall be fully  protected  in relying  upon,  an
Opinion of Counsel stating that the execution of such supplemental  indenture is
authorized  or  permitted by this  Indenture.  The Trustee may, but shall not be
obligated  to,  enter into any such  supplemental  indenture  which  affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

         Section 904 Effect of Supplemental Indentures.

         Upon the execution of any  supplemental  indenture  under this Article,
this Indenture shall be modified in accordance therewith,  and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities  theretofore or thereafter  authenticated and delivered  hereunder
shall be bound thereby.

         Section 905 Conformity with Trust Indenture Act.

         Every  supplemental  indenture  executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act.

         Section 906 Reference in Securities to Supplemental Indentures.

         Securities  of  any  series   authenticated  and  delivered  after  the
execution of any supplemental  indenture pursuant to this Article may, and shall
if required by the Trustee,  bear a notation in form  approved by the Trustee as
to any matter provided for in such supplemental  indenture. If the Company shall
so determine,  new  Securities  of any series so modified as to conform,  in the
opinion of the Trustee and the Company,  to any such supplemental  indenture may
be prepared and executed by the Company and  authenticated  and delivered by the
Trustee in exchange for Outstanding Securities of such series.

                                  ARTICLE TEN

                                    Covenants

         Section 1001 Payment of Principal, Premium and Interest.

         The  Company  covenants  and agrees for the  benefit of each  series of
Securities that it will duly and punctually pay the principal of and any premium
and interest on the  Securities of that series in  accordance  with the terms of
the Securities and this Indenture.



                                      -54-
<PAGE>

         Section 1002 Maintenance of Office or Agency.

         The  Company  will  maintain in each Place of Payment for any series of
Securities an office or agency where  Securities of that series may be presented
or surrendered for payment,  where  Securities of that series may be surrendered
for  registration  of transfer or exchange  and where  notices and demands to or
upon the Company in respect of the  Securities of that series and this Indenture
may be served. The Company will give prompt written notice to the Trustee of the
location,  and any change in the location,  of such office or agency.  If at any
time the Company  shall fail to maintain any such  required  office or agency or
shall fail to furnish the Trustee with the address thereof,  such presentations,
surrenders,  notices and demands  may be made or served at the  Corporate  Trust
Office of the Trustee,  and the Company hereby appoints the Trustee as its agent
to receive all such presentations, surrenders, notices and demands.

         The  Company  may also from time to time  designate  one or more  other
offices or agencies  where the Securities of one or more series may be presented
or  surrendered  for any or all such  purposes and may from time to time rescind
such  designations;  provided,  however,  that no such designation or rescission
shall in any manner  relieve the Company of its obligation to maintain an office
or agency  in each  Place of  Payment  for  Securities  of any  series  for such
purposes. The Company will give prompt written notice to the Trustee of any such
designation  or  rescission  and of any change in the location of any such other
office or agency.

         Section 1003 Money for Securities Payments to Be Held in Trust.

         If the  Company  shall  at any time act as its own  Paying  Agent  with
respect to any series of Securities,  it will, on or before each due date of the
principal of or any premium or interest on any of the Securities of that series,
segregate  and hold in trust for the benefit of the Persons  entitled  thereto a
sum sufficient to pay the principal and any premium and interest so becoming due
until such sums shall be paid to such Persons or otherwise disposed of as herein
provided  and will  promptly  notify the  Trustee of its action or failure so to
act.

         Whenever  the  Company  shall  have one or more  Paying  Agents for any
series of Securities, it will, prior to each due date of the principal of or any
premium or interest on any  Securities  of that  series,  deposit  with a Paying
Agent a sum  sufficient  to pay such amount,  such sum to be held as provided by
the Trust  Indenture  Act,  and (unless  such Paying  Agent is the  Trustee) the
Company will promptly notify the Trustee of its action or failure so to act.

         The Company will cause each Paying  Agent for any series of  Securities
other than the Trustee to execute and  deliver to the Trustee an  instrument  in
which such Paying Agent shall agree with the Trustee,  subject to the provisions
of this Section,  that such Paying Agent will (1) comply with the  provisions of
the Trust  Indenture  Act  applicable to it as a Paying Agent and (2) during the
continuance  of any  default  by the  Company  (or any  other  obligor  upon the
Securities  of that  series)  in the  making of any  payment  in  respect of the
Securities of that series,  upon the written  request of the Trustee,  forthwith
pay to the Trustee  all sums held in trust by such  Paying  Agent for payment in
respect of the Securities of that series.



                                      -55-
<PAGE>

         The  Company  may at  any  time,  for  the  purpose  of  obtaining  the
satisfaction  and discharge of this Indenture or for any other purpose,  pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying  Agent,  such sums to be held by the Trustee
upon the same  trusts as those upon which such sums were held by the  Company or
such Paying  Agent;  and,  upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further  liability  with respect to
such money.

         Any money  deposited with the Trustee or any Paying Agent, or then held
by the Company,  in trust for the payment of the  principal of or any premium or
interest on any  Security of any series and  remaining  unclaimed  for two years
after such  principal,  premium or interest has become due and payable  shall be
paid to the Company on Company  Request,  or (if then held by the Company) shall
be discharged from such trust; and the Holder of such Security shall thereafter,
as an unsecured general creditor,  look only to the Company for payment thereof,
and all liability of the Trustee or such Paying Agent with respect to such trust
money,  and all  liability of the Company as trustee  thereof,  shall  thereupon
cease;  provided,  however,  that the Trustee or such Paying Agent, before being
required to make any such repayment,  may at the expense of the Company cause to
be published once, in a newspaper published in the English language, customarily
published   on   each   Business   Day   and   of   general    circulation    in
 .......................,  notice  that such money  remains  unclaimed  and that,
after a date  specified  therein,  which shall not be less than 30 days from the
date of such  publication,  any unclaimed  balance of such money then  remaining
will be repaid to the Company.

         Section 1004 Statement by Officers as to Default.

         The Company will deliver to the Trustee,  within 120 days after the end
of each fiscal year of the Company  ending after the date  hereof,  an Officers'
Certificate, stating whether or not to the best knowledge of the signers thereof
the Company is in default in the performance and observance of any of the terms,
provisions  and conditions of this  Indenture  (without  regard to any period of
grace or requirement of notice provided  hereunder) and, if the Company shall be
in default,  specifying  all such defaults and the nature and status  thereof of
which they may have knowledge.

         Section 1005 Existence.

         Subject to Article  Eight,  the Company will do or cause to be done all
things  necessary to preserve  and keep in full force and effect its  existence,
rights  (charter and  statutory) and  franchises;  provided,  however,  that the
Company  shall not be required to preserve  any such right or  franchise  if the
Board of Directors  shall determine that the  preservation  thereof is no longer
desirable  in the  conduct  of the  business  of the  Company  and that the loss
thereof is not disadvantageous in any material respect to the Holders.



                                      -56-
<PAGE>

         Section 1006 Maintenance of Properties.

         The Company will cause all properties  used or useful in the conduct of
its business or the business of any  Restricted  Subsidiary to be maintained and
kept in good condition, repair and working order and supplied with all necessary
equipment  and  will  cause  to  be  made  all  necessary   repairs,   renewals,
replacements,  betterments and improvements  thereof,  all as in the judgment of
the Company  may be  necessary  so that the  business  carried on in  connection
therewith may be properly and advantageously  conducted at all times;  provided,
however,  that  nothing  in  this  Section  shall  prevent  the  Company  or any
Restricted  Subsidiary from discontinuing the operation or maintenance of any of
such  properties  if such  discontinuance  is, in the judgment of the Company or
such  Restricted  Subsidiary,  desirable  in the conduct of its  business or the
business  of any  such  Restricted  Subsidiary  and not  disadvantageous  in any
material respect to the Holders.

         Section 1007 Payment of Taxes and Other Claims.

         The Company will pay or  discharge  or cause to be paid or  discharged,
before  the  same  shall  become  delinquent,  (a) all  taxes,  assessments  and
governmental  charges  levied or imposed upon the Company or any  Subsidiary  or
upon the income,  profits or  property  of the Company or any of its  Restricted
Subsidiaries, and (b) all lawful claims for labor, materials and supplies which,
if unpaid, might by law become a lien upon the property of the Company or any of
its  Restricted  Subsidiaries;  provided,  however,  that  the  Company  or such
Restricted  Subsidiary  shall not be required to pay or discharge or cause to be
paid or  discharged  any such tax,  assessment,  charge or claim  whose  amount,
applicability  or  validity  is being  contested  in good  faith by  appropriate
proceedings.

         Section 1008 Maintenance of Insurance.

         The Company shall, and shall cause its Restricted Subsidiaries to, keep
at all times all of their  properties  which are of an insurable  nature insured
against loss or damage with insurers  believed by the Company to be  responsible
to the  extent  that  property  of  similar  character  is usually so insured by
corporations  similarly  situated and owning like  properties in accordance with
good  business  practice.  The Company  shall,  and shall  cause its  Restricted
Subsidiaries  to, use the  proceeds  from any such  insurance  policy to repair,
replace or otherwise restore the property to which such proceeds relate.

         Section 1009 Waiver of Certain Covenants.

         Except as  otherwise  specified  as  contemplated  by  Section  301 for
Securities of such series,  the Company may,  with respect to the  Securities of
any series, omit in any particular  instance to comply with any term,  provision
or  condition  set forth in any  covenant  provided  pursuant  to clause  (r) of
Section  301 or clause (b) or (g) of Section  901 for the benefit of the Holders
of such series or in any of Sections 1005 to 1007, inclusive, if before the time
for such  compliance  the Holders of at least a majority in principal  amount of
the Outstanding Securities of such series shall, by Act of such Holders,  either
waive such compliance in such instance or


                                      -57-
<PAGE>

generally waive compliance with such term,  provision or condition,  but no such
waiver shall extend to or affect such term, provision or condition except to the
extent so expressly waived,  and, until such waiver shall become effective,  the
obligations  of the Company and the duties of the Trustee in respect of any such
term, provision or condition shall remain in full force and effect.

                                 ARTICLE ELEVEN

                            Redemption of Securities

         Section 1101 Applicability of Article.

         Securities  of any series  which are  redeemable  before  their  Stated
Maturity  shall be  redeemable  in  accordance  with their  terms and (except as
otherwise  specified  as  contemplated  by Section 301 for such  Securities)  in
accordance with this Article.

         Section 1102 Election to Redeem; Notice to Trustee.

         The election of the Company to redeem any Securities shall be evidenced
by a Board  Resolution or in another manner specified as contemplated by Section
301 for  such  Securities.  In case of any  redemption  at the  election  of the
Company  of less  than all the  Securities  of any  series  (including  any such
redemption  affecting only a single  Security),  the Company shall,  at least 60
days prior to the Redemption  Date fixed by the Company (unless a shorter notice
shall be  satisfactory  to the Trustee),  notify the Trustee of such  Redemption
Date, of the  principal  amount of Securities of such series to be redeemed and,
if applicable, of the tenor of the Securities to be redeemed. In the case of any
redemption of Securities  prior to the  expiration  of any  restriction  on such
redemption  provided  in the  terms  of such  Securities  or  elsewhere  in this
Indenture,  the Company shall furnish the Trustee with an Officers'  Certificate
evidencing compliance with such restriction.

         Section 1103 Selection by Trustee of Securities to Be Redeemed.

         If less  than  all the  Securities  of any  series  are to be  redeemed
(unless all the  Securities  of such  series and of a specified  tenor are to be
redeemed  or  unless  such  redemption  affects  only a  single  Security),  the
particular  Securities  to be redeemed  shall be selected  not more than 60 days
prior to the Redemption Date by the Trustee, from the Outstanding  Securities of
such series not previously called for redemption,  by such method as the Trustee
shall deem fair and  appropriate  and which may  provide for the  selection  for
redemption of a portion of the principal  amount of any Security of such series,
provided that the  unredeemed  portion of the  principal  amount of any Security
shall be in an authorized denomination (which shall not be less than the minimum
authorized  denomination) for such Security.  If less than all the Securities of
such series and of a specified tenor are to be redeemed  (unless such redemption
affects only a single Security),  the particular Securities to be redeemed shall
be selected not more than 60 days prior to the  Redemption  Date by the Trustee,
from  the  Outstanding  Securities  of  such  series  and  specified  tenor  not
previously called for redemption in accordance with the preceding sentence.



                                      -58-
<PAGE>

         The  Trustee  shall  promptly  notify  the  Company  in  writing of the
Securities  selected for  redemption as aforesaid and, in case of any Securities
selected for partial redemption as aforesaid, the principal amount thereof to be
redeemed.

         The  provisions  of the two preceding  paragraphs  shall not apply with
respect  to any  redemption  affecting  only a  single  Security,  whether  such
Security  is to be  redeemed  in  whole  or in  part.  In the  case of any  such
redemption  in part,  the  unredeemed  portion  of the  principal  amount of the
Security  shall be in an authorized  denomination  (which shall not be less than
the minimum authorized denomination) for such Security.

         For all  purposes  of this  Indenture,  unless  the  context  otherwise
requires,  all provisions relating to the redemption of Securities shall relate,
in the case of any  Securities  redeemed or to be redeemed  only in part, to the
portion of the principal  amount of such  Securities  which has been or is to be
redeemed.

         Section 1104 Notice of Redemption.

         Notice  of  redemption  shall  be given by  first-class  mail,  postage
prepaid,  mailed not less than 30 nor more than 60 days prior to the  Redemption
Date, to each Holder of Securities to be redeemed,  at his address  appearing in
the Security Register.

         All notices of redemption shall state:

                  (a) the Redemption Date,

                  (b) the Redemption Price,

                  (c) if less than all the Outstanding  Securities of any series
         consisting  of more  than a single  Security  are to be  redeemed,  the
         identification  (and,  in the case of  partial  redemption  of any such
         Securities,  the principal amounts) of the particular  Securities to be
         redeemed and, if less than all the Outstanding Securities of any series
         consisting  of a single  Security  are to be  redeemed,  the  principal
         amount of the particular Security to be redeemed,

                  (d) that on the  Redemption  Date the  Redemption  Price  will
         become due and payable upon each such  Security to be redeemed  and, if
         applicable,  that  interest  thereon  will cease to accrue on and after
         said date,

                  (e) that on the  Redemption  Date,  if such is the  case,  the
         right of the holders of each such  Security  to convert the  Securities
         shall terminate;

                  (f) the place or places  where  each  such  Security  is to be
         surrendered for payment of the Redemption Price, and

                  (g) that the  redemption is for a sinking fund, if such is the
         case.



                                      -59-
<PAGE>

         Notice of  redemption  of  Securities to be redeemed at the election of
the Company shall be given by the Company or, at the Company's  request,  by the
Trustee in the name and at the expense of the Company and shall be irrevocable.

         Section 1105 Deposit of Redemption Price.

         Prior to any  Redemption  Date,  the  Company  shall  deposit  with the
Trustee or with a Paying  Agent (or,  if the Company is acting as its own Paying
Agent,  segregate  and hold in trust as provided  in Section  1003) an amount of
money  sufficient to pay the Redemption  Price of, and (except if the Redemption
Date shall be an Interest  Payment Date) accrued interest on, all the Securities
which are to be redeemed on that date.

         Section 1106 Securities Payable on Redemption Date.

         Notice of redemption having been given as aforesaid,  the Securities so
to be redeemed  shall,  on the  Redemption  Date,  become due and payable at the
Redemption  Price  therein  specified,  and from and after such date (unless the
Company  shall  default  in the  payment  of the  Redemption  Price and  accrued
interest) such  Securities  shall cease to bear interest.  Upon surrender of any
such Security for redemption in accordance with said notice, such Security shall
be paid by the Company at the Redemption  Price,  together with accrued interest
to the Redemption Date; provided,  however,  that, unless otherwise specified as
contemplated  by Section 301,  installments of interest whose Stated Maturity is
on or prior to the  Redemption  Date  will be  payable  to the  Holders  of such
Securities,  or one or more  Predecessor  Securities,  registered as such at the
close of business on the relevant  Record Dates according to their terms and the
provisions of Section 307.

         If any  Security  called  for  redemption  shall  not be so  paid  upon
surrender  thereof for  redemption,  the principal and any premium shall,  until
paid, bear interest from the Redemption Date at the rate prescribed  therefor in
the Security.

         Section 1107 Securities Redeemed in Part.

         Any Security  which is to be redeemed only in part shall be surrendered
at a Place of Payment therefor (with, if the Company or the Trustee so requires,
due endorsement by, or a written  instrument of transfer in form satisfactory to
the Company and the Trustee duly executed by, the Holder thereof or his attorney
duly  authorized  in writing),  and the Company shall  execute,  and the Trustee
shall  authenticate  and deliver to the Holder of such Security  without service
charge,  a new Security or Securities  of the same series and of like tenor,  of
any authorized  denomination as requested by such Holder, in aggregate principal
amount equal to and in exchange for the  unredeemed  portion of the principal of
the Security so surrendered.



                                      -60-
<PAGE>

                                 ARTICLE TWELVE

                                  Sinking Funds

         Section 1201 Applicability of Article.

         The  provisions of this Article shall be applicable to any sinking fund
for the retirement of Securities of any series except as otherwise  specified as
contemplated by Section 301 for such Securities.

         The minimum  amount of any sinking  fund  payment  provided  for by the
terms of any  Securities  is herein  referred to as a  "mandatory  sinking  fund
payment",  and any payment in excess of such minimum amount  provided for by the
terms of such  Securities  is herein  referred to as an  "optional  sinking fund
payment". If provided for by the terms of any Securities, the cash amount of any
sinking fund  payment may be subject to  reduction as provided in Section  1202.
Each sinking fund payment  shall be applied to the  redemption  of Securities as
provided for by the terms of such Securities.

         Section 1202 Satisfaction of Sinking Fund Payments with Securities.

         The Company (1) may deliver  Outstanding  Securities of a series (other
than  any  previously  called  for  redemption)  and (2) may  apply  as a credit
Securities  of a series which have been  redeemed  either at the election of the
Company  pursuant to the terms of such  Securities or through the application of
permitted  optional  sinking  fund  payments  pursuant  to  the  terms  of  such
Securities,  in each case in satisfaction of all or any part of any sinking fund
payment  with  respect to any  Securities  of such  series  required  to be made
pursuant to the terms of such  Securities  as and to the extent  provided for by
the terms of such  Securities;  provided  that the  Securities to be so credited
have not been previously so credited.  The Securities to be so credited shall be
received and credited for such purpose by the Trustee at the  Redemption  Price,
as  specified  in the  Securities  so to be  redeemed,  for  redemption  through
operation of the sinking fund and the amount of such sinking fund payment  shall
be reduced accordingly.

         Section 1203 Redemption of Securities for Sinking Fund.

         Not less than 30 days prior to each  sinking  fund payment date for any
Securities,  the Company will  deliver to the Trustee an  Officers'  Certificate
specifying  the  amount  of the  next  ensuing  sinking  fund  payment  for such
Securities  pursuant to the terms of such Securities,  the portion  thereof,  if
any,  which is to be  satisfied by payment of cash and the portion  thereof,  if
any, which is to be satisfied by delivering and crediting Securities pursuant to
Section  1202 and will also  deliver  to the  Trustee  any  Securities  to be so
delivered.  Not less than 15 days prior to each such sinking fund payment  date,
the Trustee  shall select the  Securities  to be redeemed upon such sinking fund
payment  date in the manner  specified  in Section  1103 and cause notice of the
redemption  thereof to be given in the name of and at the expense of the Company
in the manner provided in Section 1104. Such notice having been duly given,  the
redemption  of such  Securities  shall be made upon the terms and in the  manner
stated in Sections 1106 and 1107.



                                      -61-
<PAGE>

                                ARTICLE THIRTEEN

                       Defeasance and Covenant Defeasance

         Section  1301  Company's  Option  to  Effect   Defeasance  or  Covenant
Defeasance.

         The Company may elect,  at its option at any time, to have Section 1302
or Section 1303 applied to any  Securities or any series of  Securities,  as the
case may be, designated  pursuant to Section 301 as being defeasible pursuant to
such  Section  1302 or 1303,  in  accordance  with any  applicable  requirements
provided  pursuant to Section 301 and upon  compliance  with the  conditions set
forth below in this  Article.  Any such  election  shall be evidenced by a Board
Resolution or in another  manner  specified as  contemplated  by Section 301 for
such Securities.

         Section 1302 Defeasance and Discharge.

         Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of  Securities,  as the case may be, the
Company shall be deemed to have been  discharged from its  obligations,  and the
provisions of Article Fourteen shall cease to be effective, with respect to such
Securities as provided in this Section on and after the date the  conditions set
forth in Section 1304 are satisfied (hereinafter called "Defeasance").  For this
purpose, such Defeasance means that the Company shall be deemed to have paid and
discharged the entire  indebtedness  represented by such  Securities and to have
satisfied all its other  obligations  under such  Securities  and this Indenture
insofar as such Securities are concerned (and the Trustee, at the expense of the
Company,  shall execute proper instruments  acknowledging the same),  subject to
the  following  which shall  survive  until  otherwise  terminated or discharged
hereunder:  (a) the rights of Holders of such Securities to receive, solely from
the trust fund  described  in  Section  1304 and as more fully set forth in such
Section, payments in respect of the principal of and any premium and interest on
such  Securities  when  payments are due,  (b) the  Company's  obligations  with
respect to such Securities  under Sections 304, 305, 306, 1002 and 1003, (c) the
rights,  powers,  trusts, duties and immunities of the Trustee hereunder and (d)
this Article.  Subject to compliance with this Article, the Company may exercise
its  option  (if  any)  to  have  this   Section   applied  to  any   Securities
notwithstanding  the prior  exercise of its option (if any) to have Section 1303
applied to such Securities.

         Section 1303 Covenant Defeasance.

         Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of  Securities,  as the case may be, (a)
the Company shall be released from its  obligations  under clause (c) of Section
801, Sections 1006 through 1008, inclusive,  and any covenants provided pursuant
to clause (r) of Section 301 or clause (b) or (g) of Section 901 for the benefit
of the Holders of such Securities, and (b) the occurrence of any event specified
in clause (d) of Section 501 (with  respect to any of clause (c) of Section 801,
Sections 1006 through 1008, inclusive,  and any such covenants provided pursuant
to clause (r) of Section 301 or clause (b) or (g) of Section 901 shall be deemed
not to be or result in an Event of Default,  and (c) the  provisions  of Article
Fourteen  shall  cease  to be  effective,  in each  case  with  respect  to such



                                      -62-
<PAGE>

Securities as provided in this Section on and after the date the  conditions set
forth in Section 1304 are satisfied (hereinafter called "Covenant  Defeasance").
For this purpose,  such  Covenant  Defeasance  means that,  with respect to such
Securities,  the Company may omit to comply with and shall have no  liability in
respect of any term,  condition or  limitation  set forth in any such  specified
Section (to the extent so specified in the case of clause (d) of Section 501) or
Article  Fourteen,  whether  directly or  indirectly  by reason of any reference
elsewhere herein to any such Section or Article or by reason of any reference in
any such  Section  or  Article  to any  other  provision  herein or in any other
document,  but the  remainder of this  Indenture  and such  Securities  shall be
unaffected thereby.

         Section 1304 Conditions to Defeasance or Covenant Defeasance.

         The following  shall be the  conditions to the  application  of Section
1302 or Section 1303 to any Securities or any series of Securities,  as the case
may be:

                  (a) The Company shall  irrevocably have deposited or caused to
         be deposited with the Trustee (or another  trustee which  satisfies the
         requirements  contemplated by Section 609 and agrees to comply with the
         provisions  of this Article  applicable  to it) as trust funds in trust
         for the purpose of making the following payments,  specifically pledged
         as security for, and  dedicated  solely to, the benefits of the Holders
         of such  Securities,  (i) money in an amount,  or (ii) U.S.  Government
         Obligations  which  through  the  scheduled  payment of  principal  and
         interest  in  respect  thereof  in  accordance  with  their  terms will
         provide,  not later than one day  before  the due date of any  payment,
         money  in an  amount,  or (iii) a  combination  thereof,  in each  case
         sufficient,   in  the  opinion  of  a  nationally  recognized  firm  of
         independent  public  accountants  expressed in a written  certification
         thereof delivered to the Trustee, to pay and discharge, and which shall
         be applied by the Trustee (or any such other qualifying trustee) to pay
         and  discharge,  the  principal of and any premium and interest on such
         Securities on the respective Stated Maturities,  in accordance with the
         terms of this  Indenture  and such  Securities.  As used herein,  "U.S.
         Government  Obligation"  means (x) any  security  which is (i) a direct
         obligation of the United States of America for the payment of which the
         full  faith and  credit of the  United  States of America is pledged or
         (ii) an obligation  of a Person  controlled or supervised by and acting
         as an agency or  instrumentality  of the United  States of America  the
         payment  of which is  unconditionally  guaranteed  as a full  faith and
         credit  obligation  by the United States of America,  which,  in either
         case (i) or (ii),  is not callable or  redeemable  at the option of the
         issuer  thereof,  and (y) any  depositary  receipt issued by a bank (as
         defined in Section  3(a)(2) of the  Securities  Act) as custodian  with
         respect to any U.S. Government  Obligation which is specified in Clause
         (x) above and held by such bank for the  account  of the holder of such
         depositary  receipt,  or  with  respect  to  any  specific  payment  of
         principal of or interest on any U.S. Government  Obligation which is so
         specified  and held,  provided  that  (except as  required by law) such
         custodian  is not  authorized  to make any  deduction  from the  amount
         payable  to the  holder  of such  depositary  receipt  from any  amount
         received by the custodian in respect of the U.S. Government  Obligation
         or the  specific  payment of  principal  or interest  evidenced by such
         depositary receipt.



                                      -63-
<PAGE>

                  (b) In the event of an election to have  Section 1302 apply to
         any  Securities  or any series of  Securities,  as the case may be, the
         Company  shall  have  delivered  to the  Trustee  an Opinion of Counsel
         stating  that (i) the  Company  has  received  from,  or there has been
         published by, the Internal  Revenue  Service a ruling or (ii) since the
         date of this  instrument,  there  has been a change  in the  applicable
         Federal  income tax law, in either case (i) or (ii) to the effect that,
         and based thereon such opinion shall confirm that,  the Holders of such
         Securities  will not  recognize  gain or loss for  Federal  income  tax
         purposes as a result of the  deposit,  Defeasance  and  discharge to be
         effected with respect to such Securities and will be subject to Federal
         income tax on the same amount, in the same manner and at the same times
         as would be the case if such deposit, Defeasance and discharge were not
         to occur.

                  (c) In the event of an election to have  Section 1303 apply to
         any  Securities  or any series of  Securities,  as the case may be, the
         Company  shall have  delivered  to the Trustee an Opinion of Counsel to
         the effect that the Holders of such  Securities will not recognize gain
         or loss for Federal  income tax purposes as a result of the deposit and
         Covenant  Defeasance to be effected with respect to such Securities and
         will be subject to Federal  income tax on the same amount,  in the same
         manner and at the same times as would be the case if such  deposit  and
         Covenant Defeasance were not to occur.

                  (d)  The  Company  shall  have  delivered  to the  Trustee  an
         Officer's  Certificate  to the effect that neither such  Securities nor
         any  other  Securities  of the  same  series,  if  then  listed  on any
         securities exchange, will be delisted as a result of such deposit.

                  (e) No event  which  is,  or after  notice or lapse of time or
         both would become,  an Event of Default with respect to such Securities
         or any other  Securities  shall have  occurred and be continuing at the
         time of such  deposit or, with  regard to any such event  specified  in
         clause (e) or (f) of Section  501,  at any time on or prior to the 90th
         day  after the date of such  deposit  (it  being  understood  that this
         condition shall not be deemed satisfied until after such 90th day).

                  (f) Such Defeasance or Covenant Defeasance shall not cause the
         Trustee to have a conflicting  interest within the meaning of the Trust
         Indenture  Act  (assuming  all  Securities  are in  default  within the
         meaning of such Act).

                  (g) Such Defeasance or Covenant Defeasance shall not result in
         a breach or  violation  of, or  constitute a default  under,  any other
         agreement or  instrument to which the Company is a party or by which it
         is bound.

                  (h) Such Defeasance or Covenant Defeasance shall not result in
         the trust arising from such deposit  constituting an investment company
         within the  meaning of the  Investment  Company  Act unless  such trust
         shall  be  registered  under  such  Act  or  exempt  from  registration
         thereunder.



                                      -64-
<PAGE>

                  (i) At the time of such deposit, (i) no default in the payment
         of any  principal  of or premium or  interest  on any Senior Debt shall
         have occurred and be continuing,  (ii) no event of default with respect
         to any Senior Debt shall have  resulted  in such Senior Debt  becoming,
         and  continuing  to be, due and  payable  prior to the date on which it
         would  otherwise  have become due and payable  (unless  payment of such
         Senior  Debt has been made or duly  provided  for),  and (iii) no other
         event of default  with  respect to any Senior Debt shall have  occurred
         and be  continuing  permitting  (after notice or lapse of time or both)
         the  holders  of such  Senior  Debt (or a  trustee  on  behalf  of such
         holders) to declare such Senior Debt due and payable  prior to the date
         on which it would otherwise have become due and payable.

                  (j)  The  Company  shall  have  delivered  to the  Trustee  an
         Officer's  Certificate and an Opinion of Counsel, each stating that all
         conditions  precedent  with  respect  to such  Defeasance  or  Covenant
         Defeasance have been complied with.

         Section 1305 Deposited Money and U.S. Government Obligations to Be Held
in Trust; Miscellaneous Provisions.

         Subject to the  provisions of the last  paragraph of Section 1003,  all
money and U.S. Government Obligations (including the proceeds thereof) deposited
with the  Trustee or other  qualifying  trustee  (solely  for  purposes  of this
Section and Section 1306, the Trustee and any such other trustee are referred to
collectively  as the  "Trustee")  pursuant  to  Section  1304 in  respect of any
Securities shall be held in trust and applied by the Trustee, in accordance with
the provisions of such  Securities and this  Indenture,  to the payment,  either
directly or through any such Paying Agent  (including  the Company acting as its
own  Paying  Agent)  as the  Trustee  may  determine,  to the  Holders  of  such
Securities,  of all sums due and to become due  thereon in respect of  principal
and any premium and interest,  but money so held in trust need not be segregated
from other funds except to the extent required by law. Money and U.S. Government
Obligations  so held in trust shall not be subject to the  provisions of Article
Fourteen.

         The Company shall pay and indemnify the Trustee against any tax, fee or
other  charge  imposed on or assessed  against the U.S.  Government  Obligations
deposited  pursuant to Section 1304 or the  principal  and interest  received in
respect thereof other than any such tax, fee or other charge which by law is for
the account of the Holders of Outstanding Securities.

         Anything in this Article to the contrary  notwithstanding,  the Trustee
shall  deliver or pay to the Company from time to time upon Company  Request any
money or U.S. Government Obligations held by it as provided in Section 1304 with
respect to any Securities which, in the opinion of a nationally  recognized firm
of independent public accountants  expressed in a written  certification thereof
delivered to the Trustee,  are in excess of the amount  thereof which would then
be required to be deposited to effect the Defeasance or Covenant Defeasance,  as
the case may be, with respect to such Securities.



                                      -65-
<PAGE>

         Section 1306 Reinstatement.

         If the  Trustee  or the  Paying  Agent is  unable to apply any money in
accordance  with this Article with  respect to any  Securities  by reason of any
order or judgment of any court or governmental authority enjoining,  restraining
or otherwise  prohibiting  such  application,  then the  obligations  under this
Indenture  and such  Securities  from which the Company has been  discharged  or
released  pursuant to Section  1302 or 1303 shall be revived and  reinstated  as
though no deposit had  occurred  pursuant to this  Article  with respect to such
Securities, until such time as the Trustee or Paying Agent is permitted to apply
all money held in trust pursuant to Section 1305 with respect to such Securities
in accordance with this Article;  provided,  however,  that if the Company makes
any payment of  principal  of or any  premium or  interest on any such  Security
following such reinstatement of its obligations, the Company shall be subrogated
to the rights (if any) of the Holders of such Securities to receive such payment
from the money so held in trust.

                                ARTICLE FOURTEEN

                           Subordination of Securities

         Section 1401 Securities Subordinate to Senior Debt.

         The Company covenants and agrees, and each Holder of a Security, by his
acceptance  thereof,  likewise covenants and agrees,  that, to the extent and in
the manner  hereinafter set forth in this Article  (subject to the provisions of
Article  Four and  Article  Thirteen),  the  payment  of the  principal  of (and
premium,  if any) and  interest  on each and all of the  Securities  are  hereby
expressly made  subordinate and subject in right of payment to the prior payment
in full of all Senior Debt.

         Section 1402 Payment Over of Proceeds Upon Dissolution, Etc.

         In the event of (a) any insolvency or bankruptcy case or proceeding, or
any  receivership,   liquidation,   reorganization  or  other  similar  case  or
proceeding in connection therewith, relative to the Company or to its creditors,
as such, or to its assets, or (b) any liquidation,  dissolution or other winding
up of the Company, whether voluntary or involuntary and whether or not involving
insolvency or bankruptcy,  or (c) any assignment for the benefit of creditors or
any other  marshalling of assets or liabilities of the Company,  then and in any
such event  specified in (a), (b) or (c) above (each such event,  if any, herein
sometimes  referred  to as a  "Proceeding")  the  holders of Senior Debt will be
first entitled to receive payment in full of all amounts due or to become due on
or in respect of all Senior Debt,  or provision  shall be made for such payment,
in cash or Cash Equivalents or otherwise in a manner satisfactory to the holders
of Senior Debt, before the Holders of the Securities are entitled to receive any
payment or distribution of any kind or character, on account of principal of (or
premium,  if  any)  or  interest  on or  other  obligations  in  respect  of the
Securities or on account of any purchase or other  acquisition  of Securities by
the Company or any Subsidiary of the Company (all such payments,  distributions,
purchases and acquisitions herein referred to, individually and collectively, as
a  "Securities


                                      -66-
<PAGE>

Payment"),  and to that end the  holders  of Senior  Debt shall be  entitled  to
receive,  for application to the payment thereof,  any Securities  Payment which
may be  payable  or  deliverable  in  respect  of  the  Securities  in any  such
Proceeding.

         In the event that,  notwithstanding  the  foregoing  provisions of this
Section,  the Trustee  receives payment or distribution of assets of the Company
of any kind or character,  before all the Senior Debt is paid in full in cash or
Cash Equivalents,  then and in such event such Securities  Payment shall be paid
over or delivered forthwith to the trustee in bankruptcy,  receiver, liquidating
trustee,   custodian,   assignee,  agent  or  other  Person  making  payment  or
distribution  of assets of the  Company  for  application  to the payment of all
Senior Debt remaining  unpaid, to the extent necessary to pay the Senior Debt in
full in cash or Cash Equivalents.

         For  purposes  of  this  Article  only,   the  words  "any  payment  or
distribution of any kind or character,  whether in cash, property or securities"
shall not be deemed to include a payment or  distribution of stock or securities
of the  Company  provided  for  by a  plan  of  reorganization  or  readjustment
authorized  by an order or  decree  of a court of  competent  jurisdiction  in a
reorganization  proceeding  under any applicable  bankruptcy law or of any other
corporation  provided for by such plan of reorganization  or readjustment  which
stock or securities are subordinated in right of payment to all then outstanding
Senior Debt to at least the same extent as the Securities are so subordinated as
provided  in this  Article;  provided,  however,  that (a) if a new  corporation
results from such  reorganization or readjustment,  such corporation assumes any
Senior Debt not paid in full in cash or Cash Equivalents in connection with such
reorganization  or readjustment and (b) the rights of the holders of such Senior
Debt  are  not,   without  the  consent  of  such   holders,   altered  by  such
reorganization  or readjustment.  The  consolidation of the Company with, or the
merger of the Company into,  another Person or the liquidation or dissolution of
the Company  following the conveyance or transfer of all or substantially all of
its  properties  and assets as an entirety to another  Person upon the terms and
conditions  set forth in Article Eight shall not be deemed a Proceeding  for the
purposes  of this  Section if the Person  formed by such  consolidation  or into
which the  Company is merged or the  Person  which  acquires  by  conveyance  or
transfer such  properties and assets as an entirety,  as the case may be, shall,
as a part of such consolidation, merger, conveyance or transfer, comply with the
conditions set forth in Article Eight.

         Section 1403 No Payment When Senior Debt in Default.

         In the event that any Senior  Payment  Default (as defined below) shall
have occurred and be continuing, then no Securities Payment shall be made unless
and until such Senior  Payment  Default shall have been cured or waived or shall
have  ceased to exist or all  amounts  then due and payable in respect of Senior
Debt shall have been paid in full,  or  provision  shall have been made for such
payment,  in cash or Cash  Equivalents or otherwise in a manner  satisfactory to
the holders of Senior Debt.  "Senior  Payment  Default" means any default in the
payment of principal of (or premium, if any) or interest on any Senior Debt when
due, whether at the Maturity thereof or by declaration of acceleration, call for
redemption or otherwise.



                                      -67-
<PAGE>

         In the event that any Senior  Nonmonetary  Default (as  defined  below)
shall have occurred and be continuing, then, upon the receipt by the Company and
the  Trustee of  written  notice of such  Senior  Nonmonetary  Default  from the
representatives  of holders of the Designated  Senior Debt to which such default
relates,  the Company may not make any payments (other than payments  previously
made pursuant to Article  Fifteen) on account of the Securities or on account of
the purchase or redemption or other  acquisition of Securities for a period (the
"blockage  period")  commencing on the date the Company and Trustee receive such
written  notice and ending on the earlier of (a) the 179th day after the date of
such  receipt  of such  written  notice and (b) the date,  if any,  on which the
Designated  Senior  Debt to which such  default  relates is  discharged  or such
default is waived or otherwise  cured. In any event,  not more than one blockage
period may be  commenced  during any  period of 360  consecutive  days and there
shall be a  period  of at  least  181  consecutive  days in each  period  of 360
consecutive days when no blockage period is in effect.  For all purposes of this
paragraph,  no Senior Nonmonetary  Default that existed or was continuing on the
date of  commencement  of any  blockage  period with  respect to the  Designated
Senior Debt  initiating  such blockage period will be, or can be, made the basis
for the  commencement  of a subsequent  blockage  period unless such default has
been cured or waived for a period of not less than 180 consecutive days. "Senior
Nonmonetary  Default" means the  occurrence or existence and  continuance of any
event of  default,  or of any  event  which,  after  notice or lapse of time (or
both),  would  become an event of  default,  under  the terms of any  instrument
pursuant to which any Designated  Senior Debt is outstanding,  permitting (after
notice or lapse of time or both) one or more  holders of such  Senior Debt (or a
trustee or agent on behalf of the holders  thereof) to declare  such Senior Debt
due and  payable  prior to the date on which it would  otherwise  become due and
payable, other than a Senior Payment Default.

         In the event and during the  continuation of any default in the payment
of principal  of (or premium,  if any) or interest on any Senior Debt beyond any
applicable grace period with respect thereto,  or in the event that any event of
default  with respect to any Senior Debt shall have  occurred and be  continuing
permitting  the  holders  of such  Senior  Debt (or a  trustee  on behalf of the
holders  thereof) to declare such Senior Debt,  and shall have  resulted in such
Senior Debt  becoming or being  declared,  due and payable  prior to the date on
which it would  otherwise  have  become due and  payable,  unless and until such
event of default  shall have been cured or waived or shall have ceased to exist,
or in the event any  judicial  proceeding  shall be pending  with respect to any
such default in payment or event of default, then no Securities Payment shall be
made.

         In the event that,  notwithstanding  the  foregoing,  the Company shall
make any  Securities  Payment to the  Trustee or any  Holder  prohibited  by the
foregoing provisions of this Section, then and in such event, subject to Section
1404, such Securities Payment shall be paid over and delivered  forthwith to the
holders of the Senior Debt remaining  unpaid,  to the extent necessary to pay in
full all the Senior Debt.

         The  provisions  of this  Section  shall  not  apply to any  Securities
Payment with respect to which Section 1402 would be applicable.

                                      -68-
<PAGE>

         Section 1404 Payment Permitted If No Default.

         Nothing  contained in this Article or elsewhere in this Indenture or in
any of the Securities  shall prevent (a) the Company,  at any time except during
the  pendency  of any  Proceeding  referred  to in  Section  1402 or  under  the
conditions  described in Section 1403, from making Securities  Payments,  or (b)
the  application  by the Trustee of any money  deposited  with it  hereunder  to
Securities  Payments or the retention of such Securities Payment by the Holders,
if, at the time of such  application  by the Trustee,  it did not have knowledge
that such  Securities  Payment would have been  prohibited by the  provisions of
this Article.

         Section 1405 Subrogation to Rights of Holders of Senior Debt.

         Subject to the  payment in full of all  amounts due or to become due on
or in respect of Senior Debt, or the provision for such payment, in cash or Cash
Equivalents or otherwise in a manner satisfactory to the holders of Senior Debt,
the Holders of the Securities shall be subrogated  (equally and ratably with the
holders  of all  Indebtedness  of the  Company  which  by its  express  terms is
subordinated to Indebtedness of the Company to substantially  the same extent as
the  Securities  are  subordinated  to the Senior  Debt and is  entitled to like
rights of subrogation by reason of any payments or distributions made to holders
of such Senior Debt) to the rights of the holders of such Senior Debt to receive
payments and  distributions of cash,  property and securities  applicable to the
Senior Debt until the  principal  of (and  premium,  if any) and interest on the
Securities shall be paid in full. For purposes of such subrogation,  no payments
or  distributions  to the  holders of the Senior  Debt of any cash,  property or
securities  to which the  Holders  of the  Securities  or the  Trustee  would be
entitled  except  for the  provisions  of this  Article,  and no  payments  over
pursuant  to the  provisions  of this  Article to the  holders of Senior Debt by
Holders of the  Securities  or the Trustee,  shall,  as among the  Company,  its
creditors  other than holders of Senior Debt and the Holders of the  Securities,
be deemed to be a payment or distribution by the Company to or on account of the
Senior Debt.

         Section 1406 Provisions Solely to Define Relative Rights.

         The  provisions  of this  Article are and are  intended  solely for the
purpose of defining the  relative  rights of the Holders on the one hand and the
holders of Senior Debt on the other hand.  Nothing  contained in this Article or
elsewhere  in this  Indenture or in the  Securities  is intended to or shall (a)
impair,  as among the Company,  its creditors  other than holders of Senior Debt
and the Holders of the  Securities,  the  obligation  of the  Company,  which is
absolute  and  unconditional,  to pay  to the  Holders  of  the  Securities  the
principal of (and  premium,  if any) and interest on the  Securities as and when
the same shall become due and payable in  accordance  with their  terms;  or (b)
affect the relative  rights against the Company of the Holders of the Securities
and  creditors  of the  Company  other than the holders of Senior  Debt;  or (c)
prevent the Trustee or the Holder of any Security from  exercising  all remedies
otherwise permitted by applicable law upon default under this Indenture, subject
to the  rights,  if any,  under this  Article of the  holders of Senior  Debt to
receive cash,  property and securities  otherwise  payable or deliverable to the
Trustee or such Holder.



                                      -69-
<PAGE>

         Section 1407 Trustee to Effectuate Subordination.

         Each  Holder of a Security by his  acceptance  thereof  authorizes  and
directs  the Trustee on his behalf to take such  action as may be  necessary  or
appropriate  to  effectuate  the  subordination  provided  in this  Article  and
appoints the Trustee his attorney-in-fact for any and all such purposes.

         Section 1408 No Waiver of Subordination Provisions.

         No right of any present or future  holder of any Senior Debt to enforce
subordination  as herein  provided shall at any time in any way be prejudiced or
impaired  by any act or failure to act on the part of the  Company or by any act
or failure to act, in good faith, by any such holder, or by any noncompliance by
the  Company  with  the  terms,  provisions  and  covenants  of this  Indenture,
regardless  of any  knowledge  thereof any such holder may have or be  otherwise
charged with.

         Without in any way limiting the generality of the foregoing  paragraph,
the holders of Senior  Debt may, at any time and from time to time,  without the
consent of or notice to the  Trustee or the Holders of the  Securities,  without
incurring  responsibility to the Holders of the Securities and without impairing
or  releasing  the  subordination  provided in this  Article or the  obligations
hereunder of the Holders of the Securities to the holders of Senior Debt, do any
one or more of the following:  (a) change the manner,  place or terms of payment
or extend the time of payment of, or renew,  increase or alter,  Senior Debt, or
otherwise  amend or  supplement  in any  manner  Senior  Debt or any  instrument
evidencing the same or any agreement under which Senior Debt is outstanding; (b)
sell, exchange,  release or otherwise deal with any property pledged,  mortgaged
or otherwise  securing  Senior Debt; (c) release any Person liable in any manner
for the payment or collection  of Senior Debt;  and (d) exercise or refrain from
exercising any rights against the Company and any other Person.

         Section 1409 Notice to Trustee.

         The Company shall give prompt written notice to the Trustee of any fact
known to the Company which would prohibit the making of any payment to or by the
Trustee in respect of the  Securities.  Notwithstanding  the  provisions of this
Article or any other  provision  of this  Indenture,  the  Trustee  shall not be
charged with  knowledge of the  existence of any facts which would  prohibit the
making of any payment to or by the Trustee in respect of the Securities,  unless
and until the  Trustee  shall have  received  written  notice  thereof  from the
Company or a holder of Senior Debt or from any trustee  therefor;  and, prior to
the receipt of any such written notice,  the Trustee,  subject to the provisions
of Section  601,  shall be entitled in all respects to assume that no such facts
exist; provided, however, that if the Trustee shall not have received the notice
provided for in this Section at least three Business Days prior to the date upon
which  by the  terms  hereof  any  money  may  become  payable  for any  purpose
(including, without limitation, the payment of the principal of (and premium, if
any) or  interest on any  Security),  then,  anything  herein  contained  to the
contrary  notwithstanding,  the Trustee  shall have full power and  authority to
receive such money and to apply the same to the purpose for which such money was


                                      -70-
<PAGE>

received  and shall not be affected by any notice to the  contrary  which may be
received by it within three Business Days prior to such date.

         Subject to the provisions of Section 601, the Trustee shall be entitled
to rely on the  delivery  to it of a  written  notice  by a Person  representing
himself to be a holder of Senior Debt (or a trustee  therefor) to establish that
such notice has been given by a holder of Senior  Debt (or a trustee  therefor).
In the event that the Trustee  determines in good faith that further evidence is
required  with  respect to the right of any Person as a holder of Senior Debt to
participate in any payment or distribution pursuant to this Article, the Trustee
may request such Person to furnish  evidence to the reasonable  satisfaction  of
the Trustee as to the amount of Senior Debt held by such  Person,  the extent to
which such Person is entitled to participate in such payment or distribution and
any other facts  pertinent to the rights of such Person under this Article,  and
if such  evidence  is not  furnished,  the Trustee may defer any payment to such
Person pending judicial  determination as to the right of such Person to receive
such payment.

         Section 1410 Reliance on Judicial  Order or  Certificate of Liquidating
Agent.

         Upon any payment or distribution  of assets of the Company  referred to
in this Article, the Trustee,  subject to the provisions of Section 601, and the
Holders of the  Securities  shall be  entitled  to rely upon any order or decree
entered  by any court of  competent  jurisdiction  in which such  Proceeding  is
pending,  or a certificate of the trustee in bankruptcy,  receiver,  liquidating
trustee, custodian, assignee for the benefit of creditors, agent or other Person
making such payment or distribution,  delivered to the Trustee or to the Holders
of  Securities,  for  the  purpose  of  ascertaining  the  Persons  entitled  to
participate in such payment or distribution,  the holders of the Senior Debt and
other  indebtedness of the Company,  the amount thereof or payable thereon,  the
amount or amounts  paid or  distributed  thereon and all other  facts  pertinent
thereto or to this Article.

         Section 1411 Trustee Not Fiduciary for Holders of Senior Debt.

         The  Trustee  shall  not be  deemed  to owe any  fiduciary  duty to the
holders of Senior  Debt and shall not be liable to any such  holders if it shall
in good faith  mistakenly  pay over or distribute to Holders of Securities or to
the Company or to any other Person  cash,  property or  securities  to which any
holders of Senior Debt shall be entitled by virtue of this Article or otherwise.

         Section 1412 Rights of Trustee as Holder of Senior  Debt;  Preservation
of Trustee's Rights.

         The  Trustee in its  individual  capacity  shall be entitled to all the
rights set forth in this  Article  with  respect to any Senior Debt which may at
any time be held by it, to the same extent as any other  holder of Senior  Debt,
and nothing in this Indenture  shall deprive the Trustee of any of its rights as
such holder.



                                      -71-
<PAGE>

         Nothing in this  Article  shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 607.

         Section 1413 Article Applicable to Paying Agents.

         In case at any time any Paying Agent other than the Trustee  shall have
been appointed by the Company and be then acting  hereunder,  the term "Trustee"
as used in this  Article  shall  in such  case  (unless  the  context  otherwise
requires) be construed  as extending to and  including  such Paying Agent within
its meaning as fully for all intents and  purposes as if such Paying  Agent were
named in this  Article  in  addition  to or in place of the  Trustee;  provided,
however,  that Section  1414 shall not apply to the Company or any  Affiliate of
the Company if it or such Affiliate acts as Paying Agent.

         Section 1414 Defeasance of this Article Fourteen.

         The  subordination  of the  Securities  provided  by  this  Article  is
expressly made subject to the  provisions for defeasance or covenant  defeasance
in Article Thirteen hereof and, anything herein to the contrary notwithstanding,
upon the  effectiveness  of any such  defeasance  or  covenant  defeasance,  the
Securities then outstanding shall thereupon cease to be subordinated pursuant to
this Article Fourteen.

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




                                      -72-
<PAGE>

         This instrument may be executed in any number of counterparts,  each of
which so executed shall be deemed to be an original,  but all such  counterparts
shall  together  constitute  but one and the same  instrument.  In  proving  the
existence  of this  Indenture it shall not be necessary to produce more than one
copy.

         In Witness Whereof, the parties hereto have caused this Indenture to be
duly executed,  and their respective  corporate seals to be hereunto affixed and
attested, all as of the day and year first above written.

                                                  American Tower Corporation



                                                  By............................
Attest:

 ...........................
 ...................................


By.................................

Attest:

 ...........................


                                      -73-
<PAGE>

STATE OF NEW YORK          )
                           )  ss.:
COUNTY OF NEW YORK         )


         On the  ....  day of  ...........,  ....,  before  me  personally  came
 ...........................,  to me  known,  who,  being by me duly  sworn,  did
depose      and     say     that     he     is      ....................      of
 .................................,  one of  the  corporations  described  in and
which  executed  the  foregoing  instrument;  that  he  knows  the  seal of said
corporation;  that the seal affixed to said  instrument is such corporate  seal;
that  it was so  affixed  by  authority  of  the  Board  of  Directors  of  said
corporation; and that he signed his name thereto by like authority.

                                                 ...............................


STATE OF NEW YORK          )
                           )  ss.:
COUNTY OF NEW YORK         )


         On the  ....  day of  ...........,  ....,  before  me  personally  came
 ...........................,  to me  known,  who,  being by me duly  sworn,  did
depose      and     say     that     he     is      ....................      of
 .................................,  one of  the  corporations  described  in and
which  executed  the  foregoing  instrument;  that  he  knows  the  seal of said
corporation;  that the seal affixed to said  instrument is such corporate  seal;
that  it was so  affixed  by  authority  of  the  Board  of  Directors  of  said
corporation; and that he signed his name thereto by like authority.

                                                 ...............................



                                                                     EXHIBIT 4.2











                           AMERICAN TOWER CORPORATION

                                       TO

                         ...............................

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


                                    Indenture

                      Dated as of ..................., 2000


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

<PAGE>
<TABLE>
<CAPTION>

                                                  Table of Contents

                                                                                                                 Page

<S>                       <C>                                                                                    <C>
ARTICLE ONE                Definitions and Other Provisions.......................................................1
         Section 101       Definitions............................................................................1
         Section 102       Compliance Certificates and Opinions..................................................11
         Section 103       Form of Documents Delivered to Trustee................................................12
         Section 104       Acts of Holders; Record Dates.........................................................12
         Section 105       Notices, Etc., to Trustee and Company.................................................14
         Section 106       Notice to Holders; Waiver.............................................................14
         Section 107       Conflict with Trust Indenture Act.....................................................14
         Section 108       Effect of Headings and Table of Contents..............................................15
         Section 109       Successors and Assigns................................................................15
         Section 110       Separability Clause...................................................................15
         Section 111       Benefits of Indenture.................................................................15
         Section 112       Governing Law.........................................................................15
         Section 113       Legal Holidays........................................................................15

ARTICLE TWO                Security Forms........................................................................16
         Section 201       Forms Generally.......................................................................16
         Section 202       Form of Face of Security..............................................................16
         Section 203       Form of Reverse of Security...........................................................18
         Section 204       Form of Legend for Global Securities..................................................22
         Section 205       Form of Trustee's Certificate of Authentication.......................................22

ARTICLE THREE              The Securities........................................................................23
         Section 301       Amount Unlimited; Issuable in Series..................................................23
         Section 302       Denominations.........................................................................25
         Section 303       Execution, Authentication, Delivery and Dating........................................26
         Section 304       Temporary Securities..................................................................27
         Section 305       Registration, Registration of Transfer and Exchange...................................28
         Section 306       Mutilated, Destroyed, Lost and Stolen Securities......................................29
         Section 307       Payment of Interest; Interest Rights Preserved........................................30
         Section 308       Persons Deemed Owners.................................................................31
         Section 309       Cancellation..........................................................................31
         Section 310       Computation of Interest...............................................................32

ARTICLE FOUR               Satisfaction and Discharge............................................................32
         Section 401       Satisfaction and Discharge of Indenture...............................................32
         Section 402       Application of Trust Money............................................................33

ARTICLE FIVE               Remedies..............................................................................33
         Section 501       Events of Default.....................................................................33
         Section 502       Acceleration of Maturity; Rescission and Annulment....................................35
         Section 503       Collection of Indebtedness and Suits for Enforcement by Trustee.......................36
         Section 504       Trustee May File Proofs of Claim......................................................36

                                                         -i-
<PAGE>
<CAPTION>

                                                  Table of Contents
                                                    (continued)
                                                                                                                 Page

<S>                       <C>                                                                                    <C>

         Section 505       Trustee May Enforce Claims Without Possession of Securities...........................37
         Section 506       Application of Money Collected........................................................37
         Section 507       Limitation on Suits...................................................................38
         Section 508       Unconditional Right of Holders to Receive Principal,
                           Premium and Interest..................................................................38
         Section 509       Restoration of Rights and Remedies....................................................38
         Section 510       Rights and Remedies Cumulative........................................................39
         Section 511       Delay or Omission Not Waiver..........................................................39
         Section 512       Control by Holders....................................................................39
         Section 513       Waiver of Past Defaults...............................................................39
         Section 514       Undertaking for Costs.................................................................40
         Section 515       Waiver of Usury, Stay or Extension Laws...............................................40

ARTICLE SIX                The Trustee...........................................................................40
         Section 601       Certain Duties and Responsibilities...................................................40
         Section 102       Notice of Defaults....................................................................41
         Section 603       Certain Rights of Trustee.............................................................41
         Section 604       Not Responsible for Recitals or Issuance of Securities................................42
         Section 605       May Hold Securities...................................................................42
         Section 606       Money Held in Trust...................................................................42
         Section 607       Compensation and Reimbursement........................................................42
         Section 608       Conflicting Interests.................................................................43
         Section 609       Corporate Trustee Required; Eligibility...............................................43
         Section 610       Resignation and Removal; Appointment of Successor.....................................43
         Section 611       Acceptance of Appointment by Successor................................................45
         Section 612       Merger, Conversion, Consolidation or Succession to Business...........................46
         Section 613       Preferential Collection of Claims Against Company.....................................46
         Section 614       Appointment of Authenticating Agent...................................................46

ARTICLE SEVEN              Holders' Lists and Reports by Trustee and Company.....................................48
         Section 701       Company to Furnish Trustee Names and Addresses of Holders.............................48
         Section 702       Preservation of Information; Communications to Holders................................48
         Section 703       Reports by Trustee....................................................................49
         Section 704       Reports by Company....................................................................49

ARTICLE EIGHT              Consolidation, Merger, Conveyance, Transfer or
                           Lease.................................................................................49
         Section 801       Company May Consolidate, Etc., Only on Certain Terms..................................49
         Section 802       Successor Substituted.................................................................50

ARTICLE NINE               Supplemental Indentures...............................................................50
         Section 901       Supplemental Indentures Without Consent of Holders....................................50
         Section 902       Supplemental Indentures With Consent of Holders.......................................52
         Section 903       Execution of Supplemental Indentures..................................................53

                                                        -ii-
<PAGE>
<CAPTION>

                                                  Table of Contents
                                                    (continued)
                                                                                                                 Page

<S>                       <C>                                                                                    <C>
         Section 904       Effect of Supplemental Indentures.....................................................53
         Section 905       Conformity with Trust Indenture Act...................................................53
         Section 906       Reference in Securities to Supplemental Indentures....................................53

ARTICLE TEN                Covenants.............................................................................53
         Section 1001      Payment of Principal, Premium and Interest............................................53
         Section 1002      Maintenance of Office or Agency.......................................................54
         Section 1003      Money for Securities Payments to Be Held in Trust.....................................54
         Section 1004      Statement by Officers as to Default...................................................55
         Section 1005      Existence.............................................................................55
         Section 1006      Maintenance of Properties.............................................................56
         Section 1007      Payment of Taxes and Other Claims.....................................................56
         Section 1008      Maintenance of Insurance..............................................................56
         Section 1009      Waiver of Certain Covenants...........................................................56

ARTICLE ELEVEN             Redemption of Securities..............................................................57
         Section 1101      Applicability of Article..............................................................57
         Section 1102      Election to Redeem; Notice to Trustee.................................................57
         Section 1103      Selection by Trustee of Securities to Be Redeemed.....................................57
         Section 1104      Notice of Redemption..................................................................58
         Section 1105      Deposit of Redemption Price...........................................................59
         Section 1106      Securities Payable on Redemption Date.................................................59
         Section 1107      Securities Redeemed in Part...........................................................59

ARTICLE TWELVE             Sinking Funds.........................................................................60
         Section 1201      Applicability of Article..............................................................60
         Section 1202      Satisfaction of Sinking Fund Payments with Securities.................................60
         Section 1203      Redemption of Securities for Sinking Fund.............................................60

ARTICLE THIRTEEN           Defeasance and Covenant Defeasance.............................................................61
         Section 1301      Company's Option to Effect Defeasance or Covenant Defeasance..........................61
         Section 1302      Defeasance and Discharge..............................................................61
         Section 1303      Covenant Defeasance...................................................................61
         Section 1304      Conditions to Defeasance or Covenant Defeasance.......................................62
         Section 1305      Deposited Money and U.S. Government Obligations to Be Held
                            in Trust; Miscellaneous Provisions...................................................64
         Section 1306      Reinstatement.........................................................................65
</TABLE>

                                                       -iii-


<PAGE>
    Certain Sections of this Indenture relating to Sections 310 through 318,
                 inclusive, of the Trust Indenture Act of 1939:

Trust Indenture
  Act Section                                                  Indenture Section

ss.310(a)(1)...........................................................609
       (a)(2)..........................................................609
       (a)(3)...............................................Not Applicable
       (a)(4)...............................................Not Applicable
       (b).............................................................608
ss.311(a)..............................................................613
       (b).............................................................613
ss.312(a)..............................................................701
       (b).............................................................702
       (c).............................................................702
ss.313(a)..............................................................703
       (b).............................................................703
       (c).............................................................703
       (d).............................................................703
ss.314(a)..............................................................704
       (a)(4)..........................................................101
       (b)..................................................Not Applicable
       (c)(1)..........................................................102
       (c)(2)..........................................................102
       (c)(3)...............................................Not Applicable
       (d)..................................................Not Applicable
       (e).............................................................102
ss.315(a)..............................................................601
       (b).............................................................602
       (c).............................................................601
       (d).............................................................601
       (e).............................................................514
ss.316(a)..............................................................101
       (a)(1)(A).......................................................502
       (a)(1)(B).......................................................513
       (a)(2)...............................................Not Applicable
       (b).............................................................508
       (c).............................................................104
ss.317(a)(1)...........................................................503
       (a)(2)..........................................................504
       (b).............................................................508
       (c).............................................................104
ss.317(a)(1)...........................................................503
       (a)(2)..........................................................504
       (b)............................................................1003
ss.318(a)..............................................................107
- ----------------------
NOTE:    This reconciliation and tie shall not, for any purpose, be deemed to be
         part of the Indenture.
<PAGE>
         INDENTURE,  dated as of  ................,  2000 between American Tower
Corporation,  a corporation  duly  organized and existing  under the laws of the
State  of  Delaware  corporation  (herein  called  the  "Company"),  having  its
principal  office at 116 Huntington  Avenue,  Boston,  Massachusetts  02116, and
 .............................., a ........................... duly organized and
existing under the laws of ........, as Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

         The Company has duly  authorized  the  execution  and  delivery of this
Indenture  to  provide  for the  issuance  from  time  to time of its  unsecured
debentures,  notes  or  other  evidences  of  indebtedness  (herein  called  the
"Securities"), to be issued in one or more series as in this Indenture provided.

         All things  necessary to make this  Indenture a valid  agreement of the
Company, in accordance with its terms, have been done.

         Now, Therefore, This Indenture Witnesseth:

         For  and in  consideration  of the  premises  and the  purchase  of the
Securities  by the Holders  thereof,  it is mutually  agreed,  for the equal and
proportionate  benefit of all Holders of the Securities or of series thereof, as
follows:

                                  ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

         Section 101 Definitions.

                  For  all  purposes  of this  Indenture,  except  as  otherwise
expressly provided or unless the context otherwise requires:

                  (a) the  terms  defined  in this  Article  have  the  meanings
         assigned to them in this  Article and include the plural as well as the
         singular;

                  (b) all other terms used herein which are defined in the Trust
         Indenture  Act,  either  directly  or by  reference  therein,  have the
         meanings assigned to them therein;

                  (c) all accounting terms not otherwise defined herein have the
         meanings  assigned  to  them  in  accordance  with  generally  accepted
         accounting  principles,  and,  except  as  otherwise  herein  expressly
         provided,  the term "generally  accepted  accounting  principles"  with
         respect to any computation  required or permitted  hereunder shall mean
         such accounting principles as are generally accepted at the Issue Date;

                  (d)  unless  otherwise  specifically  set  forth  herein,  all
         calculations or  determinations  of a Person shall be performed or made
         on  a  consolidated   basis  in  accordance  with  generally   accepted
         accounting principles;
<PAGE>

                  (e) unless the context otherwise requires, any reference to an
         "Article" or a "Section" refers to an Article or a Section, as the case
         may be, of this Indenture; and

                  (f) the words  "herein",  "hereof" and  "hereunder"  and other
         words of similar  import refer to this  Indenture as a whole and not to
         any particular Article, Section or other subdivision.

         Certain  terms,  used  principally  in Article  14, are defined in that
Article.

         "Act", when used with respect to any Holder,  has the meaning specified
in Section 104.

         "Affiliate" of any specified  Person means any other Person directly or
indirectly  controlling  or  controlled  by or under  direct or indirect  common
control  with  such  specified  Person.  For the  purposes  of this  definition,
"control"  when used with  respect to any  specified  Person  means the power to
direct the  management  and  policies of such  Person,  directly or  indirectly,
whether  through the ownership of voting  securities,  by contract or otherwise;
and the terms  "controlling" and "controlled"  have meanings  correlative to the
foregoing.

         "ATC"  means  ATC  Teleports,   Inc.,  a  Delaware  corporation  and  a
Subsidiary of the Company.

         "ATI"  means  American  Towers,  Inc.,  a  Delaware  corporation  and a
Subsidiary of the Company.

         "ATLP" means American Tower, L.P., a Delaware limited partnership and a
Subsidiary of the Company.

         "Authenticating  Agent"  means any  Person  authorized  by the  Trustee
pursuant  to  Section  614 to act on  behalf  of  the  Trustee  to  authenticate
Securities of one or more series.

         "Bankruptcy  Code" means Title 11,  United  States  Bankruptcy  Code of
1978, as amended,  or any similar United States federal or state law relating to
bankruptcy, insolvency, receivership, winding-up, liquidation, reorganization or
relief of debtors or any amendment to, succession to or change in any such law.

         "blockage period" has the meaning specified in Section 1203.

         "Board of Directors" means either the board of directors of the Company
or any duly authorized committee of that board.

         "Board  Resolution"  means  a copy  of a  resolution  certified  by the
Secretary or an Assistant  Secretary of the Company to have been duly adopted by
the Board of  Directors  and to be in full  force and effect on the date of such
certification, and delivered to the Trustee.

                                      -2-
<PAGE>

         "Business Day",  when used with respect to any Place of Payment,  means
each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which
banking institutions in that Place of Payment are authorized or obligated by law
or executive order to close.

         "Capital Lease Obligation" means, at any time any determination thereof
is to be made,  the amount of the  liability in respect of a capital  lease that
would  at such  time be  required  to be  capitalized  on the  balance  sheet in
accordance with GAAP.

         "Capital Stock" means (i) in the case of a corporation,  capital stock,
(ii) in the case of any  association  or  business  entity,  any and all shares,
interests,  participations,  rights or other equivalents (however designated) or
capital  stock and  (iii) in the case of a  partnership,  partnership  interests
(whether  general or  limited)  and any other  interest  or  participation  that
confers on a Person the right to receive a share of the  profits  and losses of,
or distributions of assets of, such partnership.

         "Cash  Equivalents"  means (i) United States  dollars,  (ii) securities
issued  or  directly  and fully  guaranteed  or  insured  by the  United  States
government or any agency or  instrumentality  thereof having  maturities of less
than one year from the date of  acquisition,  (iii)  certificates of deposit and
eurodollar  time deposits with maturities of less than one year from the date of
acquisition,  bankers'  acceptances  with  maturities  of less than one year and
overnight  bank  deposits,  in each case  with any  lender  party to the  Credit
Agreement or with any  domestic  commercial  bank having  capital and surplus in
excess of  $500,000,000  and a Keefe  Bank Watch  Rating of "B" or better,  (iv)
repurchase  obligations  with a term of not more than seven days for  underlying
securities  of the types  described in clauses (ii) and (iii)  entered into with
any financial  institution meeting the qualifications  specified in clause (iii)
above and (v) commercial paper having the highest rating obtainable from Moody's
Investors Service, Inc. or Standard & Poor's Ratings Services, a division of the
McGraw-Hill Companies,  Inc., and in each case maturing within nine months after
the date of acquisition.

         "Change of Control" means the occurrence of any of the following:

                           (i) the sale,  lease or transfer,  in one or a series
                  of related  transactions,  of all or substantially  all of the
                  Company's  assets to any Person or group (as such term is used
                  in Section  13(d)(3)  of the  Exchange  Act)  (other  than the
                  Principal Shareholders or their Related Parties),

                           (ii)  the   adoption  of  a  plan   relating  to  the
                  liquidation or dissolution of the Company,

                           (iii) the acquisition, directly or indirectly, by any
                  Person or group (as such term is used in Section  13(d)(3)  of
                  the  Exchange  Act) (other  than one or more of the  Principal
                  Shareholders  and their Related Parties) of 50% or more of the
                  voting  power of the  voting  stock of the  Company  by way of
                  merger  or  consolidation  or  otherwise,  provided  that such
                  acquisition  will not constitute a "Change of Control"  unless
                  or until such  Person or group owns,  directly or

                                      -3-
<PAGE>

                  indirectly,  more of the voting  power of the voting  stock of
                  the Company than the Principal  Shareholders and their Related
                  Parties, or

                           (iv) the Continuing Directors cease for any reason to
                  constitute a majority of the  directors of the Company then in
                  office.

For purposes of this definition, any transfer of an Equity Interest of an entity
that was formed for the purpose of acquiring  voting stock of the Company  shall
be deemed to be a transfer of such portion of such voting  stock as  corresponds
to the portion of the equity of such entity that has been so transferred.

         "Commission" means the Securities and Exchange Commission, from time to
time  constituted,  created under the Exchange Act, or, if at any time after the
execution of this  instrument such Commission is not existing and performing the
duties  now  assigned  to it  under  the  Trust  Indenture  Act,  then  the body
performing such duties at such time.

         "Common  Stock" of any Person means  Capital  Stock of such Person that
does not rank prior, as to the payment of dividends or as to the distribution of
assets upon any voluntary or involuntary liquidation,  dissolution or winding up
of such Person, to shares of Capital Stock of any other class of such Person.

         "Company"  means  the  Person  named  as the  "Company"  in  the  first
paragraph  of this  instrument  until a successor  Person shall have become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Company" shall mean such successor Person.

         "Company  Request" or "Company  Order" means a written request or order
signed  in the  name of the  Company  by its  Chairman  of the  Board,  its Vice
Chairman of the Board, its Chief Executive Officer, its Chief Operating Officer,
its Chief Financial  Officer,  its President or a Vice President,  and,  without
duplication,  by its  Treasurer,  an Assistant  Treasurer,  its  Secretary or an
Assistant Secretary, and delivered to the Trustee.

         "Corporate  Trust Office" means the principal  office of the Trustee in
 ................... at which at any particular time its corporate trust business
shall be administered.

         "corporation" means a corporation,  association,  company,  joint-stock
company or business trust.

         "Covenant Defeasance" has the meaning specified in Section 1303.

         "Credit Agreement" means Amended and Restated Loan Agreement,  dated as
of January 6, 2000,  among ATC, ATI, ATLP,  Toronto Dominion  (Texas),  Inc., as
administrative  agent, The  Toronto-Dominion  Bank, New York Branch,  as Issuing
Bank, TD Securities (USA) Inc. and Chase  Securities Inc., as Co-Lead  Arrangers
and  Co-Book  Managers,  The Bank of New  York and  Chase  Securities  Inc.,  as
Co-Syndication  Agents,  Credit Suisse First Boston, as Documentation Agent, and
the financial  institutions defined as "Lenders" therein, as heretofore

                                      -4-
<PAGE>

amended,  including (i) any related notes,  guarantees  (including guarantees by
the  Company   and/or  the  Company's   Subsidiaries),   collateral   documents,
instruments and agreements executed in connection therewith, and in each case as
amended, modified,  renewed, refunded, replaced or refinanced from time to time,
and  (ii)  any  notes,   guarantees   (including  guarantees  by  the  Company's
Subsidiaries),  collateral  documents,  instruments  and agreements  executed in
connection  with  any  such   amendment,   modification,   renewal,   refunding,
replacement or refinancing.

         "Default" means any event that is, or after the giving of notice or the
passage of time or both would be, an Event of Default.

         "Defaulted Interest" has the meaning specified in Section 307.

         "Defeasance" has the meaning specified in Section 1302.

         "Depositary"  means,  with respect to Securities of any series issuable
in whole or in part in the form of one or more  Global  Securities,  a  clearing
agency registered under the Exchange Act that is designated to act as Depositary
for such Securities as contemplated by Section 301.

         "Disqualified  Stock" means any Capital Stock that, by its terms (or by
the  terms of any  security  into  which it is  convertible  or for  which it is
exchangeable),  or upon the  happening of any event,  matures or is  mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, or is redeemable
at the option of the holder  thereof (other than upon a Change of Control of the
Company in circumstances  where the holders of the Securities would have similar
rights),  in whole or in part on or prior to one year after the Stated  Maturity
of the Securities.  The amount of Disqualified Stock shall be the greater of the
liquidation preference or mandatory or optional redemption price thereof.

         "Equity  Interests"  means Capital  Stock and all warrants,  options or
other  rights  to  acquire   Capital  Stock   (including  any   Indebtedness  or
Disqualified  Stock that is  convertible  into,  or  exchangeable  for,  Capital
Stock).

         "Event of Default" has the meaning specified in Section 501.

         "Exchange  Act"  means  the  Securities  Exchange  Act of 1934  and any
statute successor thereto, in each case as amended from time to time.

         "Expiration Date" has the meaning specified in Section 104.

         "GAAP" means generally accepted accounting  principles set forth in the
opinions and  pronouncements of the Accounting  Principles Board of the American
Institute of Certified Public  Accountants and statements and  pronouncements of
the Financial  Accounting  Standards  Board, or in such other statements by such
other entity as have been  approved by a significant  segment of the  accounting
profession, which are in effect on the Issue Date.

                                      -5-
<PAGE>

         "Global  Security"  means a Security that  evidences all or part of the
Securities  of any series and bears the legend set forth in Section 204 (or such
legend as may be specified as contemplated by Section 301 for such Securities).

         "guarantee"  means a guarantee (other than by endorsement of negotiable
instruments  for  collection  or deposit in the  ordinary  course of  business),
direct or indirect,  in any manner (including,  without  limitation,  letters of
credit and reimbursement  agreements in respect thereof),  of all or any part of
any Indebtedness.

         "Hedging   Obligations"   means,  with  respect  to  any  Person,   the
Obligations  of such Person under (i) interest  rate swap  agreements,  interest
rate cap  agreements  and  interest  rate  collar  agreements,  and  (ii)  other
agreements or arrangements  designed to protect such Person against fluctuations
in interest rates.

         "Holder"  means a Person in whose name a Security is  registered in the
Security Register.

         "Immediate Family Member" means,  with respect to any individual,  such
individual's spouse (past or current),  descendants (natural or adoptive, of the
whole or half  blood)  of the  parents  of such  individual,  such  individual's
grandparents and parents (natural or adoptive),  and the  grandparents,  parents
and descendants of parents (natural or adoptive,  of the whole or half blood) of
such individual's spouse (past or current).

         "incur" means, with respect to any obligation of any Person, to create,
issue, incur, assume or directly or indirectly  guarantee or in any other manner
become directly or indirectly  liable for any  Indebtedness  (and  "incurrence",
"incurred",  "incurable" and "incurring" shall have meanings  correlative to the
foregoing).

         "Indebtedness"  means,  with  respect  to any  Person,  whether  or not
contingent,  (i) all  indebtedness  of such Person for borrowed money or for the
deferred  purchase  price of  property or services  (other  than  current  trade
liabilities  incurred  in  the  ordinary  course  of  business  and  payable  in
accordance  with  customary  practices)  or which is evidenced by a note,  bond,
debenture or similar  instrument,  (ii) all Capital  Lease  Obligations  of such
Person,  (iii) all obligations of such Person in respect of letters of credit or
bankers'  acceptances issued or created for the account of such Person, (iv) all
Hedging  Obligations of such Person, (v) all liabilities  secured by any Lien on
any  property  owned by such  Person  even if such  Person  has not  assumed  or
otherwise  become  liable for the payment  thereof to the extent of the value of
the  property  subject  to such  Lien,  and  (vi) to the  extent  not  otherwise
included,  any guarantee by such person of any other  Person's  indebtedness  or
other obligations described in clauses (i) through (v) above.

         "Indenture" means this instrument as originally  executed and as it may
from  time  to  time  be  supplemented  or  amended  by one or  more  indentures
supplemental  hereto entered into pursuant to the applicable  provisions hereof,
including,  for all  purposes  of this  instrument  and  any  such  supplemental
indenture,  the  provisions  of the Trust  Indenture Act that are deemed to be a
part  of and  govern  this  instrument  and  any  such  supplemental  indenture,
respectively.  The term

                                      -6-
<PAGE>

"Indenture"  shall also  include the terms of  particular  series of  Securities
established as contemplated by Section 301.

         "interest",  when used  with  respect  to an  Original  Issue  Discount
Security which by its terms bears interest only after  Maturity,  means interest
payable after Maturity.

         "Interest Payment Date", when used with respect to any Security,  means
the Stated Maturity of an installment of interest on such Security.

         "Investment  Company Act" means the Investment  Company Act of 1940 and
any statute successor thereto, in each case as amended from time to time.

         "Issue  Date"  means the date of  initial  issuance  of the  Securities
pursuant to this Indenture.

         "Lien" means,  with respect to any asset, any mortgage,  lien,  pledge,
charge,  security  interest or encumbrance of any kind in respect of such asset,
whether or not filed,  recorded or  otherwise  perfected  under  applicable  law
(including any conditional sale or other title retention agreement, any lease in
the nature  thereof,  any option or other  agreement  to sell or give a security
interest in any asset and any filing of, or  agreement  to give,  any  financing
statement under the "Uniform  Commercial  Code" (or equivalent  statutes) of any
jurisdiction).

         "Maturity",  when used with respect to any Security,  means the date on
which the principal of such Security or an installment of principal  becomes due
and payable as therein or herein provided,  whether at the Stated Maturity or by
declaration of acceleration, call for redemption or otherwise.

         "Notice of Default"  means a written  notice of the kind  specified  in
Section 501(4) or 501(5).

         "Officers'  Certificate"  means a certificate signed by the Chairman of
the Board, a Vice Chairman of the Board, the Chief Executive Officer,  the Chief
Operating  Officer,  the  Chief  Financial  Officer,  the  President  or a  Vice
President,  and, without duplication,  by the Treasurer, an Assistant Treasurer,
the Controller,  the Secretary or an Assistant  Secretary,  of the Company,  and
delivered to the Trustee.

         "Opinion of  Counsel"  means a written  opinion of counsel,  who may be
counsel for the Company, and who shall be acceptable to the Trustee.

         "Original  Issue Discount  Security"  means any Security which provides
for an amount less than the principal  amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 502.

         "Outstanding",  when used with respect to Securities,  means, as of the
date of determination,  all Securities  theretofore  authenticated and delivered
under this Indenture, except:

                                      -7-
<PAGE>

                  (i)  Securities   theretofore  cancelled  by  the  Trustee  or
         delivered to the Trustee for cancellation;

                  (ii)  Securities for whose payment or redemption  money in the
         necessary amount has been theretofore deposited with the Trustee or any
         Paying  Agent  (other  than the  Company)  in trust  or set  aside  and
         segregated in trust by the Company (if the Company shall act as its own
         Paying  Agent) for the Holders of such  Securities;  provided  that, if
         such Securities are to be redeemed,  notice of such redemption has been
         duly  given   pursuant  to  this   Indenture  or   provision   therefor
         satisfactory to the Trustee has been made;

                  (iii)  Securities  as to which  Defeasance  has been  effected
         pursuant to Section 1302; and

                  (iv)  Securities  which have been paid pursuant to Section 306
         or in  exchange  for or in lieu of which  other  Securities  have  been
         authenticated and delivered pursuant to this Indenture,  other than any
         such  Securities in respect of which there shall have been presented to
         the Trustee proof satisfactory to it that such Securities are held by a
         bona  fide   purchaser  in  whose  hands  such   Securities  are  valid
         obligations of the Company;

provided,  however,  that in  determining  whether the Holders of the  requisite
principal  amount of the Outstanding  Securities  have given,  made or taken any
request,  demand,  authorization,  direction,  notice,  consent, waiver or other
action  hereunder as of any date, (A) the principal  amount of an Original Issue
Discount Security which shall be deemed to be Outstanding shall be the amount of
the  principal  thereof  which  would be due and  payable  as of such  date upon
acceleration  of the Maturity  thereof to such date pursuant to Section 502, (B)
if, as of such date, the principal  amount  payable at the Stated  Maturity of a
Security is not determinable,  the principal amount of such Security which shall
be deemed to be  Outstanding  shall be the amount as specified or  determined as
contemplated by Section 301, (C) the principal amount of a Security  denominated
in one or more foreign  currencies or currency units which shall be deemed to be
Outstanding shall be the U.S. dollar  equivalent,  determined as of such date in
the manner provided as  contemplated by Section 301, of the principal  amount of
such  Security  (or,  in the case of a Security  described  in Clause (A) or (B)
above, of the amount determined as provided in such Clause),  and (D) Securities
owned by the Company or any other  obligor upon the  Securities or any Affiliate
of the Company or of such other obligor shall be  disregarded  and deemed not to
be  Outstanding,  except  that,  in  determining  whether the  Trustee  shall be
protected in relying upon any such request,  demand,  authorization,  direction,
notice, consent, waiver or other action, only Securities which the Trustee knows
to be so owned  shall be so  disregarded.  Securities  so owned  which have been
pledged in good faith may be regarded as Outstanding if the pledgee  establishes
to the satisfaction of the Trustee the pledgee's right so to act with respect to
such  Securities  and that the pledgee is not the  Company or any other  obligor
upon the Securities or any Affiliate of the Company or of such other obligor.

         "Paying  Agent" means any Person  authorized  by the Company to pay the
principal  of or any  premium or  interest  on any  Securities  on behalf of the
Company.

                                      -8-
<PAGE>

         "Person"  means  any  individual,  corporation,   partnership,  limited
liability  company,  joint venture,  association,  joint stock  company,  trust,
unincorporated organization or government or any agency or political subdivision
thereof.

         "Place of  Payment",  when used with respect to the  Securities  of any
series,  means the place or places  where the  principal  of and any premium and
interest  on  the  Securities  of  that  series  are  payable  as  specified  as
contemplated by Section 301.

         "Predecessor  Security" of any particular Security means every previous
Security  evidencing all or a portion of the same debt as that evidenced by such
particular  Security;  and,  for the purposes of this  definition,  any Security
authenticated  and  delivered  under Section 306 in exchange for or in lieu of a
mutilated,  destroyed,  lost or stolen  Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

         "Principal  Shareholders"  means  Steven B.  Dodge,  Thomas H.  Stoner,
Hicks, Muse, Tate & Furst Incorporated,  Cox Telecom Towers,  Inc., Chase Equity
Associates,   LLC  and  Clear  Channel  Communications,   Inc.  including  their
Affiliates.

         "Redemption  Date",  when  used  with  respect  to any  Security  to be
redeemed,  means  the date  fixed for such  redemption  by or  pursuant  to this
Indenture.

         "Redemption  Price",  when  used with  respect  to any  Security  to be
redeemed,  means  the  price  at  which it is to be  redeemed  pursuant  to this
Indenture.

         "Regular Record Date" for the interest  payable on any Interest Payment
Date on the  Securities of any series means the date  specified for that purpose
as contemplated by Section 301.

         "Related Party" with respect to any Principal Shareholder means (i) any
80% (or more) owned  Subsidiary  or Immediate  Family  Member (in the case of an
individual) of such Principal Shareholder or (ii) any Person, the beneficiaries,
stockholders,  partners,  owners or Persons  beneficially holding an 80% or more
controlling  interest  of which  consist  of such  Principal  Shareholder  or an
Immediate  Family  Member,  or (iii) any  Person  employed  by the  Company in a
management capacity as of the Issue Date.

         "Responsible Officer", when used with respect to the Trustee, means the
chairman or any  vice-chairman  of the board of  directors,  the chairman or any
vice-chairman of the executive committee of the board of directors, the chairman
of the trust committee,  the president,  any vice president,  the secretary, any
assistant secretary,  the treasurer,  any assistant treasurer,  the cashier, any
assistant cashier,  any trust officer or assistant trust officer, the controller
or any  assistant  controller  or any other  officer of the Trustee  customarily
performing  functions  similar to those performed by any of the above designated
officers and also means,  with respect to a particular  corporate  trust matter,
any other  officer to whom such matter is referred  because of his  knowledge of
and familiarity with the particular subject.

                                      -9-
<PAGE>

         "Restricted Subsidiary" means a Subsidiary of the Company other than an
Unrestricted Subsidiary.

         "Securities"  has the  meaning  stated  in the  first  recital  of this
Indenture and more particularly means any Securities authenticated and delivered
under this Indenture.

         "Securities  Act"  means  the  Securities  Act of 1933 and any  statute
successor thereto, in each case as amended from time to time.

         "Security  Register"  and  "Security  Registrar"  have  the  respective
meanings specified in Section 305.

         "Special Record Date" for the payment of any Defaulted Interest means a
date fixed by the Trustee pursuant to Section 307.

         "Stated  Maturity",  when  used with  respect  to any  Security  or any
installment of principal thereof or interest  thereon,  means the date specified
in such  Security as the fixed date on which the  principal of such  Security or
such installment of principal or interest is due and payable.

         "Subsidiary"  means a  corporation  more  than  50% of the  outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or  more  other  Subsidiaries,   or  by  the  Company  and  one  or  more  other
Subsidiaries.  For the purposes of this  definition,  "voting stock" means stock
which ordinarily has voting power for the election of directors,  whether at all
times  or only so long as no  senior  class of stock  has such  voting  power by
reason of any contingency.

         "Trustee"  means  the  Person  named  as the  "Trustee"  in  the  first
paragraph of this  instrument  until a successor  Trustee shall have become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Trustee" shall mean or include each Person who is then a Trustee hereunder, and
if at any time  there  is more  than one such  Person,  "Trustee"  as used  with
respect to the  Securities  of any series shall mean the Trustee with respect to
Securities of that series.

         "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force
at the date as of which this instrument was executed; provided, however, that in
the event the Trust  Indenture  Act of 1939 is amended  after such date,  "Trust
Indenture Act" means, to the extent  required by any such  amendment,  the Trust
Indenture Act of 1939 as so amended.

         "Unrestricted  Subsidiary"  means  (i) , (ii) ,  (iii) , and  (iv)  any
Subsidiary  of the  Company  that  at the  time  of  determination  shall  be an
Unrestricted Subsidiary (as designated by the Board of Directors of the Company,
as provided below) and (iii) any Subsidiary of an Unrestricted  Subsidiary.  The
Board of Directors of the Company may  designate  any  Subsidiary of the Company
(including any newly acquired or newly formed  Subsidiary) to be an Unrestricted
Subsidiary if all of the following conditions apply: (a) neither the Company nor
any of its Restricted  Subsidiaries provides credit support for any Indebtedness
of  such  Subsidiary   (including  any  undertaking,   agreement  or  instrument
evidencing such  Indebtedness),  (b) such

                                      -10-
<PAGE>

Subsidiary  is  not  liable,  directly  or  indirectly,   with  respect  to  any
Indebtedness  other  than  Unrestricted   Subsidiary   Indebtedness,   (c)  such
Unrestricted Subsidiary is not a party to any agreement,  contract,  arrangement
or understanding  at such time with the Company or any Restricted  Subsidiary of
the Company  unless the terms of any such  agreement,  contract,  arrangement or
understanding are no less favorable to the Company or such Restricted Subsidiary
than  those  that  might  be  obtained  at the  time  from  Persons  who are not
Affiliates  of the  Company  (the  "Third  Party  Value")  or, in the event such
condition is not satisfied,  an amount equal to the value of the portion of such
agreement,  contract,  arrangement or understanding to such Subsidiary in excess
of the Third  Party  Value shall be deemed a  Restricted  Payment,  and (d) such
Unrestricted  Subsidiary does not own any Capital Stock of any Subsidiary of the
Company that has not theretofore been or is not simultaneously  being designated
an Unrestricted  Subsidiary.  Any such  designation by the Board of Directors of
the Company shall be evidenced to the Trustee by filing with the Trustee a board
resolution  giving  effect  to such  designation  and an  Officers'  Certificate
certifying that such  designation  complies with the foregoing  conditions.  The
Board of Directors of the Company may designate any Unrestricted Subsidiary as a
Restricted Subsidiary.

         "U.S. Government Obligation" has the meaning specified in Section 1304.

         "Vice President", when used with respect to the Company or the Trustee,
means any vice  president,  whether or not  designated  by a number or a word or
words added before or after the title "vice president".

         Section 102 Compliance Certificates and Opinions.

         Upon any  application  or request by the Company to the Trustee to take
any action under any provision of this  Indenture,  the Company shall furnish to
the Trustee such  certificates  and opinions as may be required  under the Trust
Indenture Act. Each such certificate or opinion shall be given in the form of an
Officers'  Certificate,  if to be  given by an  officer  of the  Company,  or an
Opinion  of  Counsel,  if to be given by  counsel,  and  shall  comply  with the
requirements of the Trust Indenture Act and any other  requirements set forth in
this Indenture.

         Every  certificate  or  opinion  with  respect  to  compliance  with  a
condition or covenant  provided for in this Indenture  (except for  certificates
provided for in Section 1004) shall include,

                  (1) a statement that each individual  signing such certificate
         or opinion has read such  covenant  or  condition  and the  definitions
         herein relating thereto;

                  (2) a  brief  statement  as to the  nature  and  scope  of the
         examination  or  investigation  upon which the  statements  or opinions
         contained in such certificate or opinion are based;

                  (3) a statement that, in the opinion of each such  individual,
         he has made such examination or investigation as is necessary to enable
         him to express an informed  opinion as to whether or not such  covenant
         or condition has been complied with; and

                                      -11-
<PAGE>

                  (4) a  statement  as to  whether,  in the opinion of each such
         individual, such condition or covenant has been complied with.

         Section 103 Form of Documents Delivered to Trustee.

         In any case where  several  matters are required to be certified by, or
covered by an opinion of, any specified  Person,  it is not  necessary  that all
such  matters  be  certified  by, or covered by the  opinion  of,  only one such
Person,  or that they be so certified or covered by only one  document,  but one
such Person may certify or give an opinion  with respect to some matters and one
or more other such Persons as to other matters,  and any such Person may certify
or give an opinion as to such matters in one or several documents.

         Any  certificate  or opinion of an officer of the Company may be based,
insofar as it relates to legal  matters,  upon a  certificate  or opinion of, or
representations  by,  counsel,  unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or  representations
with respect to the matters upon which his  certificate  or opinion is based are
erroneous.  Any such certificate or opinion of counsel may be based,  insofar as
it  relates  to  factual   matters,   upon  a  certificate  or  opinion  of,  or
representations  by, an officer or  officers  of the  Company  stating  that the
information  with respect to such factual  matters is in the  possession  of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know,  that the certificate or opinion or  representations  with respect to such
matters are erroneous.

         Where any  Person is  required  to make,  give or  execute  two or more
applications,  requests, consents,  certificates,  statements, opinions or other
instruments  under this Indenture,  they may, but need not, be consolidated  and
form one instrument.

         Section 104 Acts of Holders; Record Dates.

         Any request, demand, authorization,  direction, notice, consent, waiver
or other action  provided or permitted  by this  Indenture to be given,  made or
taken by Holders may be embodied in and evidenced by one or more  instruments of
substantially  similar  tenor  signed by such Holders in person or by agent duly
appointed in writing;  and, except as herein otherwise expressly provided,  such
action shall become  effective when such instrument or instruments are delivered
to the Trustee and, where it is hereby expressly required,  to the Company. Such
instrument  or  instruments  (and the  action  embodied  therein  and  evidenced
thereby) are herein  sometimes  referred to as the "Act" of the Holders  signing
such instrument or instruments.  Proof of execution of any such instrument or of
a writing  appointing any such agent shall be sufficient for any purpose of this
Indenture  and (subject to Section 601)  conclusive  in favor of the Trustee and
the Company, if made in the manner provided in this Section.

         The fact and date of the execution by any Person of any such instrument
or writing may be proved by the affidavit of a witness of such execution or by a
certificate  of a notary  public  or  other  officer  authorized  by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Where such execution is by
a  signer  acting  in a  capacity  other  than  his  individual  capacity,  such
certificate  or

                                      -12-
<PAGE>

affidavit shall also constitute sufficient proof of his authority.  The fact and
date of the execution of any such instrument or writing, or the authority of the
Person  executing  the same,  may also be proved in any other  manner  which the
Trustee deems sufficient.

         The ownership of Securities shall be proved by the Security Register.

         Any request, demand, authorization,  direction, notice, consent, waiver
or other Act of the Holder of any Security shall bind every future Holder of the
same Security and the Holder of every Security  issued upon the  registration of
transfer  thereof  or in  exchange  therefor  or in lieu  thereof  in respect of
anything  done,  omitted or suffered to be done by the Trustee or the Company in
reliance  thereon,  whether  or not  notation  of such  action is made upon such
Security.

         The  Company  may set any  day as a  record  date  for the  purpose  of
determining  the Holders of  Outstanding  Securities  of any series  entitled to
give,  make or take  any  request,  demand,  authorization,  direction,  notice,
consent,  waiver or other action  provided or permitted by this  Indenture to be
given, made or taken by Holders of Securities of such series,  provided that the
Company  may not set a record date for,  and the  provisions  of this  paragraph
shall not apply  with  respect  to,  the  giving or making of (i) any  Notice of
Default,  (ii) any declaration of acceleration referred to in Section 502, (iii)
any request to institute  proceedings  referred to in Section 507(2) or (iv) any
direction referred to in Section 512. If any record date is set pursuant to this
paragraph,  the Holders of Outstanding Securities of the relevant series on such
record  date,  and no other  Holders,  shall be  entitled  to take the  relevant
action,  whether or not such  Holders  remain  Holders  after such record  date;
provided  that no such action  shall be effective  hereunder  unless taken on or
prior to the applicable  Expiration  Date by Holders of the requisite  principal
amount of Outstanding  Securities of such series on such record date. Nothing in
this  paragraph  shall be  construed  to prevent the Company  from setting a new
record  date for any  action  for which a record  date has  previously  been set
pursuant  to this  paragraph  (whereupon  the record date  previously  set shall
automatically  and with no action by any Person be cancelled  and of no effect),
and nothing in this  paragraph  shall be  construed  to render  ineffective  any
action  taken by  Holders  of the  requisite  principal  amount  of  Outstanding
Securities  of the  relevant  series on the date such action is taken.  Promptly
after any record date is set pursuant to this paragraph, the Company, at its own
expense,  shall cause notice of such record date, the proposed action by Holders
and the applicable  Expiration Date to be given to the Trustee in writing and to
each  Holder of  Securities  of the  relevant  series in the manner set forth in
Section 106.

         With  respect to any record  date set  pursuant  to this  Section,  the
Company may designate any day as the "Expiration Date" and from time to time may
change the  Expiration  Date to any earlier or later day;  provided that no such
change shall be effective  unless notice of the proposed new Expiration  Date is
given to the  Trustee  in  writing,  and to each  Holder  of  Securities  of the
relevant  series in the  manner  set forth in  Section  106,  on or prior to the
existing  Expiration  Date. If an Expiration Date is not designated with respect
to any record date set pursuant to this Section,  the Company shall be deemed to
have initially designated the 180th day after such record date as the Expiration
Date with respect thereto, subject to its right to change the Expiration Date as
provided in this paragraph.

                                      -13-
<PAGE>

         Without limiting the foregoing, a Holder entitled hereunder to take any
action hereunder with regard to any particular Security may do so with regard to
all or any part of the principal  amount of such Security or by one or more duly
appointed  agents  each of which may do so  pursuant  to such  appointment  with
regard to all or any part of such principal amount.

         Section 105 Notices, Etc., to Trustee and Company.

         Any request, demand, authorization,  direction, notice, consent, waiver
or Act of Holders or other  document  provided or permitted by this Indenture to
be made upon, given or furnished to, or filed with,

                  (1) the  Trustee  by any  Holder  or by the  Company  shall be
         sufficient  for every purpose  hereunder if made,  given,  furnished or
         filed in writing to or with the Trustee at its Corporate  Trust Office,
         Attention: ................., or

                  (2) the  Company  by the  Trustee  or by any  Holder  shall be
         sufficient  for  every  purpose   hereunder  (unless  otherwise  herein
         expressly  provided)  if in writing  and  mailed,  first-class  postage
         prepaid, to the Company addressed to it at the address of its principal
         office  specified in the first  paragraph of this  instrument or at any
         other  address  previously  furnished  in writing to the Trustee by the
         Company.

         Section 106 Notice to Holders; Waiver.

         Where this Indenture  provides for notice to Holders of any event, such
notice shall be sufficiently given (unless otherwise herein expressly  provided)
if in writing and mailed,  first-class  postage prepaid, to each Holder affected
by such event, at his address as it appears in the Security Register,  not later
than the latest date (if any),  and not earlier than the earliest date (if any),
prescribed for the giving of such notice. In any case where notice to Holders is
given by mail,  neither the failure to mail such  notice,  nor any defect in any
notice so mailed,  to any particular Holder shall affect the sufficiency of such
notice with respect to other Holders.  Where this Indenture  provides for notice
in any manner,  such  notice may be waived in writing by the Person  entitled to
receive such notice,  either before or after the event, and such waiver shall be
the equivalent of such notice.  Waivers of notice by Holders shall be filed with
the Trustee,  but such filing shall not be a condition precedent to the validity
of any action taken in reliance upon such waiver.

         In case by reason of the  suspension  of  regular  mail  service  or by
reason of any other cause it shall be impracticable to give such notice by mail,
then such  notification  as shall be made with the approval of the Trustee shall
constitute a sufficient notification for every purpose hereunder.

         Section 107 Conflict with Trust Indenture Act.

         If any provision hereof limits, qualifies or conflicts with a provision
of the Trust  Indenture Act which is required under such Act to be a part of and
govern this Indenture,  the latter provision shall control.  If any provision of
this  Indenture  modifies or excludes any

                                      -14-
<PAGE>

provision of the Trust  Indenture Act which may be so modified or excluded,  the
latter provision shall be deemed to apply to this Indenture as so modified or to
be excluded, as the case may be.

         Section 108 Effect of Headings and Table of Contents.

         The Article and Section  headings  herein and the Table of Contents are
for convenience only and shall not affect the construction hereof.

         Section 109 Successors and Assigns.

         All  covenants and  agreements  in this  Indenture by the Company shall
bind its successors and assigns, whether so expressed or not.

         Section 110 Separability Clause.

         In case any provision in this Indenture or in the  Securities  shall be
invalid, illegal or unenforceable,  the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

         Section 111 Benefits of Indenture.

         Nothing in this  Indenture  or in the  Securities,  express or implied,
shall give to any  Person,  other than the parties  hereto and their  successors
hereunder,  the holders of Senior Debt and the Holders, any benefit or any legal
or equitable right, remedy or claim under this Indenture.

         Section 112 Governing Law.

         This Indenture and the Securities shall be governed by and construed in
accordance with the law of the State of New York.

         Section 113 Legal Holidays.

         In any case where any Interest Payment Date,  Redemption Date or Stated
Maturity of any  Security  shall not be a Business  Day at any Place of Payment,
then (notwithstanding any other provision of this Indenture or of the Securities
(other than a provision  of any  Security  which  specifically  states that such
provision shall apply in lieu of this Section)) payment of interest or principal
(and  premium,  if any) need not be made at such  Place of Payment on such date,
but may be made on the next  succeeding  Business  Day at such  Place of Payment
with the same  force  and  effect  as if made on the  Interest  Payment  Date or
Redemption Date, or at the Stated Maturity.

                                      -15-
<PAGE>

                                  ARTICLE TWO

                                 Security Forms

         Section 201 Forms Generally.

         The  Securities of each series shall be in  substantially  the form set
forth in this  Article,  or in such  other  form as shall be  established  by or
pursuant to a Board Resolution or in one or more indentures supplemental hereto,
in each case with such  appropriate  insertions,  omissions,  substitutions  and
other  variations as are required or permitted by this  Indenture,  and may have
such  letters,  numbers or other  marks of  identification  and such  legends or
endorsements  placed  thereon as may be required to comply with the rules of any
securities exchange or Depositary therefor or as may, consistently  herewith, be
determined  by the officers  executing  such  Securities,  as evidenced by their
execution  thereof.  If the form of Securities of any series is  established  by
action taken pursuant to a Board Resolution,  a copy of an appropriate record of
such action shall be certified by the Secretary or an Assistant Secretary of the
Company and  delivered to the Trustee at or prior to the delivery of the Company
Order  contemplated by Section 303 for the  authentication  and delivery of such
Securities.

         The definitive Securities shall be printed, lithographed or engraved on
steel engraved borders or may be produced in any other manner, all as determined
by the officers  executing such  Securities,  as evidenced by their execution of
such Securities.

         Section 202 Form of Face of Security.

         [Insert  any  legend  required  by the  Internal  Revenue  Code and the
regulations thereunder.]

                 ...............................................

             .......................................................

No. .........                                                      $ ........

         American Tower  Corporation,  a corporation duly organized and existing
under the laws of Delaware (herein called the "Company", which term includes any
successor  Person  under  the  Indenture  hereinafter  referred  to),  for value
received,  hereby  promises  to  pay to  ..................................,  or
registered assigns, the principal sum of ............................ Dollars on
 .........................................  [if the Security is to bear  interest
prior to Maturity, insert-- , and to pay interest thereon from .............  or
from the most recent  Interest  Payment Date to which  interest has been paid or
duly provided for, semi-annually on ............  and ............ in each year,
commencing ........., at the rate of ....% per annum, until the principal hereof
is paid or made available for payment,  provided that any principal and premium,
and any such  installment  of interest,  which is overdue shall bear interest at
the rate of ...% per annum (to the  extent  that the  payment  of such  interest
shall be legally  enforceable),  from the dates such  amounts are due until they
are paid or made  available for payment,  and such interest  shall be payable on
demand.  The interest so payable,  and punctually  paid or duly provided for, on
any

                                      -16-
<PAGE>

Interest Payment Date will, as provided in such Indenture, be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered  at the  close  of  business  on the  Regular  Record  Date  for such
interest, which shall be the ....... or ....... (whether or not a Business Day),
as the case may be, next preceding such Interest Payment Date. Any such interest
not so punctually  paid or duly provided for will forthwith  cease to be payable
to the Holder on such  Regular  Record Date and may either be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered at the close of business on a Special  Record Date for the payment of
such  Defaulted  Interest to be fixed by the Trustee,  notice  whereof  shall be
given to Holders  of  Securities  of this  series not less than 10 days prior to
such Special  Record Date, or be paid at any time in any other lawful manner not
inconsistent  with the  requirements  of any  securities  exchange  on which the
Securities of this series may be listed, and upon such notice as may be required
by such exchange, all as more fully provided in said Indenture].

[If the  Security  is not to bear  interest  prior to  Maturity,  insert  -- The
principal  of this  Security  shall  not bear  interest  except in the case of a
default in payment of principal upon acceleration,  upon redemption or at Stated
Maturity and in such case the overdue  principal  and any overdue  premium shall
bear  interest at the rate of ....% per annum (to the extent that the payment of
such interest shall be legally enforceable), from the dates such amounts are due
until they are paid or made  available  for  payment.  Interest  on any  overdue
principal or premium  shall be payable on demand.  Any such  interest on overdue
principal or premium which is not paid on demand shall bear interest at the rate
of  ......%  per annum (to the  extent  that the  payment  of such  interest  on
interest shall be legally  enforceable),  from the date of such demand until the
amount so  demanded  is paid or made  available  for  payment.  Interest  on any
overdue interest shall be payable on demand.]

         Payment of the principal of (and premium, if any) and any such interest
on this Security will be made at the office or agency of the Company  maintained
for that purpose in ............,  in such coin or currency of the United States
of America as at the time of payment is legal  tender for  payment of public and
private debts;  provided,  however, that at the option of the Company payment of
interest  may be made by check  mailed to the  address  of the  Person  entitled
thereto as such address shall appear in the Security Register.

         Reference is hereby made to the further provisions of this Security set
forth on the reverse  hereof,  which further  provisions  shall for all purposes
have the same effect as if set forth at this place.

                                      -17-
<PAGE>

         Unless the  certificate of  authentication  hereon has been executed by
the Trustee referred to on the reverse hereof by manual signature, this Security
shall  not be  entitled  to any  benefit  under  the  Indenture  or be  valid or
obligatory for any purpose.

         In Witness  Whereof,  the Company has caused this instrument to be duly
executed under its corporate seal.

Dated:                                       American Tower Corporation



                                             By................................
                                                Title:
Attest:

 ................
Title:

         Section 203 Form of Reverse of Security.

         This  Security is one of a duly  authorized  issue of securities of the
Company (herein called the "Securities"), issued and to be issued in one or more
series  under an  Indenture,  dated as of  ...............  (herein  called  the
"Indenture",  which  term  shall  have  the  meaning  assigned  to  it  in  such
instrument),  between the Company and  ...................,  as Trustee  (herein
called the  "Trustee",  which term  includes  any  successor  trustee  under the
Indenture), and reference is hereby made to the Indenture for a statement of the
respective rights,  limitations of rights,  duties and immunities  thereunder of
the  Company,  the  Trustee,  the  holders of Senior Debt and the Holders of the
Securities  and of the terms  upon  which  the  Securities  are,  and are to be,
authenticated  and delivered.  This Security is one of the series  designated on
the face hereof [if applicable, insert-- , limited in aggregate principal amount
to $...........].

         [If  applicable,  insert-- The Securities of this series are subject to
redemption upon not less than 30 days' notice by mail, [if applicable,  insert--
(1) on ...........  in any year commencing with the year ......  and ending with
the year  ......  through  operation  of the  sinking  fund for this series at a
Redemption Price equal to 100% of the principal amount, and (2)] at any time [if
applicable,  insert-- on or after  ..........,  19..], as a whole or in part, at
the election of the Company,  at the following  Redemption  Prices (expressed as
percentages of the principal amount): If redeemed [if applicable, insert-- on or
before  ...............,  ...%,  and if  redeemed]  during the  12-month  period
beginning ............. of the years indicated,


                        Redemption                                 Redemption
         Year              Price              Year                   Price



                                      -18-
<PAGE>


and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption [if  applicable,  insert -- (whether
through  operation of the sinking fund or otherwise)]  with accrued  interest to
the Redemption  Date, but interest  installments  whose Stated Maturity is on or
prior to such Redemption Date will be payable to the Holders of such Securities,
or one or more Predecessor Securities, of record at the close of business on the
relevant  Record Dates  referred to on the face  hereof,  all as provided in the
Indenture.]

         [If  applicable,  insert-- The Securities of this series are subject to
redemption  upon not less than 30 days' notice by mail, (1) on  ............  in
any year  commencing  with the year ....  and ending with the year ....  through
operation  of the  sinking  fund for this  series at the  Redemption  Prices for
redemption  through  operation of the sinking fund  (expressed as percentages of
the  principal  amount)  set forth in the table  below,  and (2) at any time [if
applicable,  insert-- on or after  ............],  as a whole or in part, at the
election of the Company, at the Redemption Prices for redemption  otherwise than
through operation of the sinking fund (expressed as percentages of the principal
amount) set forth in the table below:  If redeemed  during the  12-month  period
beginning ............ of the years indicated,


                      Redemption Price            Redemption Price For
                       For Redemption             Redemption Otherwise
                     Through Operation           Than Through Operation
                          of the                  of the Sinking Fund
  Year                  Sinking Fund              -----------------------
  ----               ------------------






and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption  (whether  through  operation of the
sinking fund or otherwise)  with accrued  interest to the  Redemption  Date, but
interest  installments  whose Stated  Maturity is on or prior to such Redemption
Date  will  be  payable  to the  Holders  of  such  Securities,  or one or  more
Predecessor  Securities,  of  record at the close of  business  on the  relevant
Record Dates referred to on the face hereof, all as provided in the Indenture.]

         [If applicable,  insert -- Notwithstanding  the foregoing,  the Company
may not,  prior to  .............,  redeem  any  Securities  of this  series  as
contemplated by [if applicable, insert -- Clause (2) of] the preceding paragraph
as a part of, or in anticipation of, any refunding operation by the application,
directly  or  indirectly,  of moneys  borrowed  having an  interest  cost to the
Company (calculated in accordance with generally accepted financial practice) of
less than .....% per annum.]

         [If applicable, insert -- The sinking fund for this series provides for
the redemption on ............  in each year beginning with the year ....... and
ending  with  the  year  ......  of [if  applicable,

                                      -19-
<PAGE>

insert -- not less than  $..........  ("mandatory  sinking  fund")  and not more
than]  $.........  aggregate  principal  amount of  Securities  of this  series.
Securities  of this series  acquired or redeemed by the Company  otherwise  than
through [if  applicable,  insert --  mandatory]  sinking  fund  payments  may be
credited against  subsequent [if applicable,  insert -- mandatory]  sinking fund
payments  otherwise  required  to be made  [if  applicable,  insert  -- , in the
inverse order in which they become due].]

         [If the Security is subject to redemption of any kind, insert -- In the
event of  redemption of this Security in part only, a new Security or Securities
of this  series  and of like tenor for the  unredeemed  portion  hereof  will be
issued in the name of the Holder hereof upon the cancellation hereof.]

         The indebtedness evidenced by this Security is, to the extent set forth
in the  Indenture,  subordinate  and  subject  in right of  payment to the prior
payment  in full  in cash or Cash  Equivalents  of all  Senior  Debt,  and  this
Security is issued  subject to the  provisions  of the  Indenture  with  respect
thereto.  Each Holder of this Security, by accepting the same, (a) agrees to and
shall be bound by such provisions, (b) authorizes and directs the Trustee on his
behalf to take such action as may be necessary or  appropriate to effectuate the
subordination so provided and (c) appoints the Trustee his  attorney-in-fact for
any and all such purposes.

         [If  applicable,  insert  --  The  Indenture  contains  provisions  for
defeasance  at any  time of [the  entire  indebtedness  of this  Security]  [or]
[certain  restrictive  covenants  and  Events of  Default  with  respect to this
Security] [, in each case] upon compliance with certain  conditions set forth in
the Indenture.]

         [If the Security is not an Original Issue Discount Security,  insert --
If an Event of Default with respect to Securities of this series shall occur and
be  continuing,  the principal of the  Securities of this series may be declared
due and payable in the manner and with the effect provided in the Indenture.]

         [If the Security is an Original Issue Discount  Security,  insert -- If
an Event of Default with respect to Securities of this series shall occur and be
continuing,  an amount of  principal  of the  Securities  of this  series may be
declared  due and  payable in the manner  and with the  effect  provided  in the
Indenture.  Such amount shall be equal to -- insert formula for  determining the
amount.  Upon payment (i) of the amount of principal so declared due and payable
and (ii) of interest on any overdue  principal,  premium and  interest  (in each
case  to the  extent  that  the  payment  of  such  interest  shall  be  legally
enforceable),  all of the Company's obligations in respect of the payment of the
principal of and premium and interest,  if any, on the Securities of this series
shall terminate.]

         The Indenture permits, with certain exceptions as therein provided, the
amendment  thereof and the  modification  of the rights and  obligations  of the
Company  and the rights of the  Holders of the  Securities  of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of 66 2/3% in principal  amount of the  Securities at the
time  Outstanding  of each series to be affected.  The  Indenture  also contains

                                      -20-
<PAGE>


provisions  permitting the Holders of specified  percentages in principal amount
of the  Securities  of each  series  at the time  Outstanding,  on behalf of the
Holders of all  Securities  of such series,  to waive  compliance by the Company
with certain  provisions of the  Indenture  and certain past defaults  under the
Indenture  and their  consequences.  Any such consent or waiver by the Holder of
this  Security  shall be  conclusive  and binding  upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer  hereof or in exchange  therefor or in lieu  hereof,  whether or not
notation of such consent or waiver is made upon this Security.

         As provided  in and subject to the  provisions  of the  Indenture,  the
Holder of this  Security  shall not have the right to institute  any  proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder,  unless such Holder shall have previously given
the Trustee written notice of a continuing  Event of Default with respect to the
Securities of this series,  the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the  Trustee  to  institute  proceedings  in respect of such Event of
Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have  received  from the Holders of a majority in principal  amount of
Securities of this series at the time Outstanding a direction  inconsistent with
such  request,  and shall have failed to institute any such  proceeding,  for 60
days after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit  instituted  by the Holder of this  Security for the
enforcement of any payment of principal hereof or any premium or interest hereon
on or after the respective due dates expressed herein.

         No reference  herein to the Indenture and no provision of this Security
or of the Indenture  shall alter or impair the obligation of the Company,  which
is  absolute  and  unconditional,  to pay the  principal  of and any premium and
interest  on this  Security  at the  times,  place and rate,  and in the coin or
currency, herein prescribed.

         As provided in the Indenture and subject to certain limitations therein
set  forth,  the  transfer  of this  Security  is  registrable  in the  Security
Register,  upon surrender of this Security for  registration  of transfer at the
office or agency of the  Company  in any place  where the  principal  of and any
premium  and  interest  on this  Security  are  payable,  duly  endorsed  by, or
accompanied  by a written  instrument  of transfer in form  satisfactory  to the
Company and the Security  Registrar  duly  executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Securities of
this  series and of like tenor,  of  authorized  denominations  and for the same
aggregate  principal  amount,  will be issued to the  designated  transferee  or
transferees.

         The  Securities  of this series are issuable  only in  registered  form
without coupons in denominations of $.......  and any integral multiple thereof.
As provided in the  Indenture  and  subject to certain  limitations  therein set
forth, Securities of this series are exchangeable for a like aggregate principal
amount of Securities of this series and of like tenor of a different  authorized
denomination, as requested by the Holder surrendering the same.

                                      -21-
<PAGE>

         No service charge shall be made for any such  registration  of transfer
or exchange,  but the Company may require  payment of a sum  sufficient to cover
any tax or other governmental charge payable in connection therewith.

         Prior to due presentment of this Security for registration of transfer,
the  Company,  the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name this Security is registered as the owner hereof for all
purposes,  whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

         All terms used in this  Security  which are  defined  in the  Indenture
shall have the meanings assigned to them in the Indenture.

         Section 204 Form of Legend for Global Securities.

         Unless  otherwise  specified  as  contemplated  by Section  301 for the
Securities evidenced thereby,  every Global Security authenticated and delivered
hereunder shall bear a legend in substantially the following form:

         This Security is a Global  Security within the meaning of the Indenture
         hereinafter  referred to and is  registered in the name of a Depositary
         or a nominee thereof. This Security may not be exchanged in whole or in
         part for a Security  registered,  and no transfer  of this  Security in
         whole or in part may be  registered,  in the name of any  Person  other
         than such  Depositary  or a  nominee  thereof,  except  in the  limited
         circumstances described in the Indenture.

         Section 205 Form of Trustee's Certificate of Authentication.

         The Trustee's  certificates of authentication shall be in substantially
the following form:

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                                                  ........................,
                                                                 As Trustee

                                                  By.......................
                                                         Authorized Officer


                                      -22-
<PAGE>

                                 ARTICLE THREE

                                 The Securities

         Section 301 Amount Unlimited; Issuable in Series.

         The aggregate principal amount of Securities which may be authenticated
and delivered under this Indenture is unlimited.

         The  Securities  may be issued in one or more  series.  There  shall be
established in or pursuant to a Board  Resolution  and,  subject to Section 303,
set forth, or determined in the manner provided, in an Officers' Certificate, or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series,

                  (a) the title of the  Securities  of the series  (which  shall
         distinguish  the Securities of the series from  Securities of any other
         series);

                  (b) any  limit  upon the  aggregate  principal  amount  of the
         Securities of the series which may be authenticated and delivered under
         this Indenture (except for Securities  authenticated and delivered upon
         registration  of transfer of, or in exchange  for, or in lieu of, other
         Securities of the series pursuant to Section 304, 305, 306, 906 or 1107
         and except for any  Securities  which,  pursuant  to Section  303,  are
         deemed never to have been authenticated and delivered hereunder);

                  (c) the  Person  to whom any  interest  on a  Security  of the
         series  shall be  payable,  if other than the Person in whose name that
         Security (or one or more  Predecessor  Securities) is registered at the
         close of business on the Regular Record Date for such interest;

                  (d) the date or dates on which the principal of any Securities
         of the series is payable;

                  (e) the rate or rates at which any  Securities  of the  series
         shall  bear  interest,  if any,  the date or dates  from which any such
         interest  shall  accrue,  the Interest  Payment Dates on which any such
         interest  shall be payable  and the  Regular  Record  Date for any such
         interest payable on any Interest Payment Date;

                  (f) the place or places where the principal of and any premium
         and interest on any Securities of the series shall be payable;

                  (g) the period or periods within which, the price or prices at
         which and the terms and  conditions  upon which any  Securities  of the
         series  may be  redeemed,  in whole or in part,  at the  option  of the
         Company and, if other than by a Board  Resolution,  the manner in which
         any  election  by  the  Company  to  redeem  the  Securities  shall  be
         evidenced;

                                      -23-
<PAGE>

                  (h) the  obligation,  if any,  of the  Company  to  redeem  or
         purchase any  Securities of the series  pursuant to any sinking fund or
         analogous  provisions  or at the option of the Holder  thereof  and the
         period or periods  within  which,  the price or prices at which and the
         terms and  conditions  upon which any Securities of the series shall be
         redeemed  or  purchased,   in  whole  or  in  part,  pursuant  to  such
         obligation;

                  (i) if other than  denominations  of $1,000  and any  integral
         multiple  thereof,  the  denominations  in which any  Securities of the
         series shall be issuable;

                  (j) if the amount of  principal  of or any premium or interest
         on any Securities of the series may be determined  with reference to an
         index or pursuant to a formula,  the manner in which such amounts shall
         be determined;

                  (k) if  other  than  the  currency  of the  United  States  of
         America,  the  currency,  currencies  or  currency  units in which  the
         principal of or any premium or interest on any Securities of the series
         shall be payable and the manner of determining  the equivalent  thereof
         in the  currency  of the  United  States of  America  for any  purpose,
         including for purposes of the  definition of  "Outstanding"  in Section
         101;

                  (l) if the  principal  of or any  premium or  interest  on any
         Securities  of the  series is to be  payable,  at the  election  of the
         Company or the Holder  thereof,  in one or more  currencies or currency
         units other than that or those in which such  Securities  are stated to
         be payable,  the currency,  currencies  or currency  units in which the
         principal of or any premium or interest on such  Securities as to which
         such  election is made shall be payable,  the periods  within which and
         the terms and conditions upon which such election is to be made and the
         amount  so  payable  (or the  manner  in  which  such  amount  shall be
         determined);

                  (m) if other than the entire  principal  amount  thereof,  the
         portion of the principal  amount of any  Securities of the series which
         shall be payable  upon  declaration  of  acceleration  of the  Maturity
         thereof pursuant to Section 502;

                  (n) if the principal  amount payable at the Stated Maturity of
         any Securities of the series will not be  determinable as of any one or
         more dates  prior to the Stated  Maturity,  the amount  which  shall be
         deemed to be the  principal  amount of such  Securities  as of any such
         date for any purpose  thereunder or hereunder,  including the principal
         amount  thereof which shall be due and payable upon any Maturity  other
         than the Stated  Maturity or which shall be deemed to be Outstanding as
         of any date prior to the Stated  Maturity  (or,  in any such case,  the
         manner in which such amount deemed to be the principal  amount shall be
         determined);

                  (o) if applicable, that the Securities of the series, in whole
         or any specified part, shall be defeasible  pursuant to Section 1302 or
         Section  1303 or both  such  Sections  and,  if  other  than by a Board
         Resolution,  the manner in which any election by the Company to defease
         such Securities shall be evidenced;

                                      -24-
<PAGE>

                  (p) if applicable,  that any Securities of the series shall be
         issuable  in  whole  or in  part  in the  form  of one or  more  Global
         Securities  and, in such case,  the  respective  Depositaries  for such
         Global  Securities,  the form of any legend or legends  which  shall be
         borne by any such Global Security in addition to or in lieu of that set
         forth in Section 204 and any circumstances in addition to or in lieu of
         those set forth in Clause (2) of the last  paragraph  of Section 305 in
         which any such Global Security may be exchanged in whole or in part for
         Securities  registered,  and any  transfer of such  Global  Security in
         whole or in part  may be  registered,  in the name or names of  Persons
         other  than  the  Depositary  for such  Global  Security  or a  nominee
         thereof;

                  (q) any  addition to or change in the Events of Default  which
         applies to any  Securities of the series and any change in the right of
         the Trustee or the requisite  Holders of such Securities to declare the
         principal amount thereof due and payable pursuant to Section 502;

                  (r) any  addition to or change in the  covenants  set forth in
         Article Ten which applies to Securities of the series;

                  (s) if  applicable,  that the  Securities  of the  series  are
         convertible  into or exchangeable  for Common Stock or other securities
         of the Company, the period or periods within which, the price or prices
         at which and the terms and conditions  upon which,  and the limitations
         and  restrictions,  if any,  upon which,  any  Securities of the series
         shall be convertible or exchangeable,  in whole or in part, into Common
         Stock or other securities of the Company; and

                  (t) any other  terms of the series  (which  terms shall not be
         inconsistent with the provisions of this Indenture, except as permitted
         by Section 901(5)).

         All  Securities  of any one  series  shall be  substantially  identical
except as to denomination and except as may otherwise be provided in or pursuant
to the Board  Resolution  referred  to above and  (subject  to Section  303) set
forth,  or  determined  in the manner  provided,  in the  Officers'  Certificate
referred to above or in any such indenture supplemental hereto.

         If any of the terms of the  series  are  established  by  action  taken
pursuant to a Board Resolution,  a copy of an appropriate  record of such action
shall be certified by the Secretary or an Assistant Secretary of the Company and
delivered  to  the  Trustee  at or  prior  to  the  delivery  of  the  Officers'
Certificate setting forth the terms of the series.

         The Securities shall be subordinated in right of payment to Senior Debt
as provided in Article Fourteen.

         Section 302 Denominations.

         The Securities of each series shall be issuable only in registered form
without  coupons  and  only in such  denominations  as  shall  be  specified  as
contemplated  by Section 301. In the absence of any such specified  denomination
with respect to the  Securities  of any series,  the

                                      -25-
<PAGE>

Securities of such series shall be issuable in  denominations  of $1,000 and any
integral multiple thereof.

         Section 303 Execution, Authentication, Delivery and Dating.

         The  Securities  shall be  executed  on  behalf of the  Company  by its
Chairman of the Board,  its Vice Chairman of the Board,  its President or one of
its Vice Presidents, under its corporate seal reproduced thereon attested by its
Secretary or one of its  Assistant  Secretaries.  The  signature of any of these
officers on the Securities may be manual or facsimile.

         Securities  bearing the manual or facsimile  signatures of  individuals
who were at any time the proper  officers of the Company shall bind the Company,
notwithstanding  that such  individuals  or any of them have ceased to hold such
offices prior to the  authentication  and delivery of such Securities or did not
hold such offices at the date of such Securities.

         At any time and from time to time after the  execution  and delivery of
this Indenture, the Company may deliver Securities of any series executed by the
Company to the Trustee for authentication, together with a Company Order for the
authentication  and delivery of such  Securities,  and the Trustee in accordance
with the Company Order shall  authenticate and deliver such  Securities.  If the
form or terms of the  Securities  of the  series  have  been  established  by or
pursuant to one or more Board  Resolutions as permitted by Sections 201 and 301,
in authenticating such Securities, and accepting the additional responsibilities
under this  Indenture  in relation  to such  Securities,  the  Trustee  shall be
entitled to receive,  and (subject to Section  601) shall be fully  protected in
relying upon, an Opinion of Counsel stating,

                  (a) if the form of such Securities has been  established by or
         pursuant to Board  Resolution  as permitted  by Section 201,  that such
         form has been  established  in conformity  with the  provisions of this
         Indenture;

                  (b) if the terms of such Securities  have been  established by
         or pursuant to Board  Resolution as permitted by Section 301, that such
         terms have been  established in conformity  with the provisions of this
         Indenture; and

                  (c) that such Securities,  when authenticated and delivered by
         the  Trustee and issued by the Company in the manner and subject to any
         conditions specified in such Opinion of Counsel,  will constitute valid
         and  legally  binding   obligations  of  the  Company   enforceable  in
         accordance  with  their  terms,  subject  to  bankruptcy,   insolvency,
         fraudulent  transfer,  reorganization,  moratorium  and similar laws of
         general applicability relating to or affecting creditors' rights and to
         general equity principles.

If such  form or terms  have  been so  established,  the  Trustee  shall  not be
required  to  authenticate  such  Securities  if the  issue  of such  Securities
pursuant to this  Indenture  will  affect the  Trustee's  own rights,  duties or
immunities  under the  Securities  and this  Indenture  or otherwise in a manner
which is not reasonably acceptable to the Trustee.

                                      -26-
<PAGE>

         Notwithstanding  the  provisions  of Section  301 and of the  preceding
paragraph,  if all Securities of a series are not to be originally issued at one
time, it shall not be necessary to deliver the Officers'  Certificate  otherwise
required  pursuant to Section  301 or the  Company  Order and Opinion of Counsel
otherwise  required  pursuant  to such  preceding  paragraph  at or prior to the
authentication  of each Security of such series if such  documents are delivered
at or prior to the  authentication  upon original issuance of the first Security
of such series to be issued.

         Each Security shall be dated the date of its authentication.

         No Security shall be entitled to any benefit under this Indenture or be
valid or  obligatory  for any purpose  unless there  appears on such  Security a
certificate  of  authentication  substantially  in the form  provided for herein
executed  by the  Trustee by manual  signature,  and such  certificate  upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has  been  duly  authenticated  and  delivered  hereunder.  Notwithstanding  the
foregoing, if any Security shall have been authenticated and delivered hereunder
but never issued and sold by the  Company,  and the Company  shall  deliver such
Security to the Trustee for  cancellation  as provided in Section  309,  for all
purposes of this  Indenture  such  Security  shall be deemed  never to have been
authenticated  and  delivered  hereunder  and  shall  never be  entitled  to the
benefits of this Indenture.

         Section 304 Temporary Securities.

         Pending the  preparation  of definitive  Securities of any series,  the
Company may execute,  and upon Company Order the Trustee shall  authenticate and
deliver,  temporary  Securities  which are printed,  lithographed,  typewritten,
mimeographed   or   otherwise   produced,   in  any   authorized   denomination,
substantially  of the tenor of the  definitive  Securities in lieu of which they
are issued and with such appropriate  insertions,  omissions,  substitutions and
other  variations as the officers  executing such  Securities may determine,  as
evidenced by their execution of such Securities.

         If  temporary  Securities  of any series are issued,  the Company  will
cause definitive  Securities of that series to be prepared without  unreasonable
delay.  After the  preparation  of  definitive  Securities  of such series,  the
temporary  Securities  of such  series  shall  be  exchangeable  for  definitive
Securities  of such series upon  surrender of the  temporary  Securities of such
series at the office or agency of the  Company  in a Place of  Payment  for that
series, without charge to the Holder. Upon surrender for cancellation of any one
or more  temporary  Securities of any series,  the Company shall execute and the
Trustee  shall  authenticate  and  deliver  in  exchange  therefor  one or  more
definitive Securities of the same series, of any authorized denominations and of
like tenor and aggregate  principal  amount.  Until so exchanged,  the temporary
Securities  of any series shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities of such series and tenor.

                                      -27-
<PAGE>

         Section 305 Registration, Registration of Transfer and Exchange.

         The Company shall cause to be kept at the Corporate Trust Office of the
Trustee a register  (the  register  maintained  in such  office and in any other
office or agency of the  Company in a Place of Payment  being  herein  sometimes
collectively  referred to as the "Security  Register") in which, subject to such
reasonable  regulations as it may  prescribe,  the Company shall provide for the
registration of Securities and of transfers of Securities. The Trustee is hereby
appointed  "Security  Registrar" for the purpose of  registering  Securities and
transfers of Securities as herein provided.

         Upon surrender for registration of transfer of any Security of a series
at the office or agency of the  Company in a Place of Payment  for that  series,
the Company shall execute,  and the Trustee shall  authenticate and deliver,  in
the name of the designated transferee or transferees, one or more new Securities
of the same  series,  of any  authorized  denominations  and of like  tenor  and
aggregate principal amount.

         At the option of the Holder,  Securities of any series may be exchanged
for other Securities of the same series, of any authorized  denominations and of
like tenor and aggregate  principal amount,  upon surrender of the Securities to
be  exchanged  at  such  office  or  agency.  Whenever  any  Securities  are  so
surrendered  for  exchange,  the Company  shall  execute,  and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

         All Securities  issued upon any registration of transfer or exchange of
Securities  shall be the valid  obligations of the Company,  evidencing the same
debt, and entitled to the same benefits under this Indenture,  as the Securities
surrendered upon such registration of transfer or exchange.

         Every Security presented or surrendered for registration of transfer or
for  exchange  shall (if so  required  by the  Company or the  Trustee)  be duly
endorsed,  or be  accompanied  by a  written  instrument  of  transfer  in  form
satisfactory  to the Company and the Security  Registrar duly  executed,  by the
Holder thereof or his attorney duly authorized in writing.

         No service  charge  shall be made for any  registration  of transfer or
exchange of Securities,  but the Company may require payment of a sum sufficient
to cover any tax or other governmental  charge that may be imposed in connection
with any  registration  of  transfer  or  exchange  of  Securities,  other  than
exchanges pursuant to Section 304, 906 or 1107 not involving any transfer.

         If the Securities of any series (or of any series and specified  tenor)
are to be redeemed  in part,  the  Company  shall not be required  (a) to issue,
register the transfer of or exchange any  Securities  of that series (or of that
series and specified tenor, as the case may be) during a period beginning at the
opening  of  business  15 days  before  the day of the  mailing  of a notice  of
redemption of any such Securities selected for redemption under Section 1103 and
ending at the close of business on the day of such  mailing,  or (b) to register
the transfer of or exchange any

                                      -28-
<PAGE>

Security so selected for  redemption in whole or in part,  except the unredeemed
portion of any Security being redeemed in part.

         The  provisions of clauses (a), (b), (c) and (d) below shall apply only
to Global Securities:

                  (a) Each Global  Security  authenticated  under this Indenture
         shall be registered in the name of the  Depositary  designated for such
         Global  Security or a nominee  thereof and delivered to such Depositary
         or a nominee  thereof  or  custodian  therefor,  and each  such  Global
         Security  shall  constitute a single  Security for all purposes of this
         Indenture.

                  (b) Notwithstanding any other provision in this Indenture,  no
         Global  Security may be  exchanged  in whole or in part for  Securities
         registered,  and no transfer  of a Global  Security in whole or in part
         may be registered,  in the name of any Person other than the Depositary
         for  such  Global  Security  or  a  nominee  thereof  unless  (i)  such
         Depositary  (A) has notified the Company that it is unwilling or unable
         to continue as Depositary for such Global Security or (B) has ceased to
         be a clearing  agency  registered  under the Exchange  Act,  (ii) there
         shall have  occurred and be continuing an Event of Default with respect
         to such Global Security or (iii) there shall exist such  circumstances,
         if  any,  in  addition  to or in  lieu of the  foregoing  as have  been
         specified for this purpose as contemplated by Section 301.

                  (c)  Subject  to Clause (2) above,  any  exchange  of a Global
         Security for other  Securities may be made in whole or in part, and all
         Securities  issued in  exchange  for a Global  Security  or any portion
         thereof shall be registered  in such names as the  Depositary  for such
         Global Security shall direct.

                  (d)  Every   Security   authenticated   and   delivered   upon
         registration of transfer of, or in exchange for or in lieu of, a Global
         Security  or any portion  thereof,  whether  pursuant to this  Section,
         Section 304, 306, 906 or 1107 or otherwise,  shall be authenticated and
         delivered in the form of, and shall be, a Global Security,  unless such
         Security  is  registered  in  the  name  of a  Person  other  than  the
         Depositary for such Global Security or a nominee thereof.

         Section 306 Mutilated, Destroyed, Lost and Stolen Securities.

         If any mutilated  Security is surrendered  to the Trustee,  the Company
shall  execute  and the  Trustee  shall  authenticate  and  deliver in  exchange
therefor a new  Security  of the same  series  and of like  tenor and  principal
amount and bearing a number not contemporaneously outstanding.

         If there shall be delivered to the Company and the Trustee (a) evidence
to their satisfaction of the destruction,  loss or theft of any Security and (b)
such  security or  indemnity as may be required by them to save each of them and
any agent of either of them  harmless,  then,  in the  absence  of notice to the
Company or the  Trustee  that such  Security  has been  acquired  by a bona fide
purchaser,  the Company  shall execute and the Trustee  shall  authenticate  and
deliver, in

                                      -29-
<PAGE>

lieu of any such destroyed,  lost or stolen Security, a new Security of the same
series  and of like  tenor  and  principal  amount  and  bearing  a  number  not
contemporaneously outstanding.

         In case any such  mutilated,  destroyed,  lost or stolen  Security  has
become or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, pay such Security.

         Upon the issuance of any new Security  under this Section,  the Company
may  require  the  payment  of a sum  sufficient  to  cover  any  tax  or  other
governmental  charge  that may be  imposed  in  relation  thereto  and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

         Every new  Security of any series  issued  pursuant to this  Section in
lieu of any  destroyed,  lost or stolen  Security  shall  constitute an original
additional contractual obligation of the Company,  whether or not the destroyed,
lost or stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all the benefits of this Indenture equally and proportionately  with
any and all other Securities of that series duly issued hereunder.

         The provisions of this Section are exclusive and shall preclude (to the
extent lawful) all other rights and remedies with respect to the  replacement or
payment of mutilated, destroyed, lost or stolen Securities.

         Section 307 Payment of Interest; Interest Rights Preserved.

         Except as  otherwise  provided  as  contemplated  by  Section  301 with
respect to any series of Securities,  interest on any Security which is payable,
and is punctually paid or duly provided for, on any Interest  Payment Date shall
be paid to the Person in whose name that  Security  (or one or more  Predecessor
Securities)  is registered  at the close of business on the Regular  Record Date
for such interest.

         Any interest on any Security of any series which is payable, but is not
punctually  paid or duly  provided  for, on any  Interest  Payment  Date (herein
called  "Defaulted  Interest") shall forthwith cease to be payable to the Holder
on the relevant  Regular  Record Date by virtue of having been such Holder,  and
such  Defaulted  Interest  may be paid by the  Company,  at its election in each
case, as provided in clause (a) or (b) below:

                  (a) The  Company  may elect to make  payment of any  Defaulted
         Interest to the Persons in whose  names the  Securities  of such series
         (or their  respective  Predecessor  Securities)  are  registered at the
         close of  business  on a Special  Record  Date for the  payment of such
         Defaulted  Interest,  which shall be fixed in the following manner. The
         Company  shall notify the Trustee in writing of the amount of Defaulted
         Interest  proposed  to be paid on each  Security of such series and the
         date of the proposed  payment,  and at the same time the Company  shall
         deposit  with the  Trustee  an amount of money  equal to the  aggregate
         amount  proposed  to be paid in respect of such  Defaulted  Interest or
         shall make  arrangements  satisfactory  to the Trustee for such deposit
         prior to the date of the

                                      -30-
<PAGE>

         proposed payment, such money when deposited to be held in trust for the
         benefit of the Persons  entitled to such Defaulted  Interest as in this
         Clause provided.  Thereupon the Trustee shall fix a Special Record Date
         for the payment of such Defaulted Interest which shall be not more than
         15 days and not  less  than 10 days  prior to the date of the  proposed
         payment  and not less than 10 days after the  receipt by the Trustee of
         the notice of the proposed  payment.  The Trustee shall promptly notify
         the  Company of such  Special  Record  Date and, in the name and at the
         expense of the Company,  shall cause notice of the proposed  payment of
         such  Defaulted  Interest  and the Special  Record Date  therefor to be
         given to each  Holder of  Securities  of such  series in the manner set
         forth in  Section  106,  not less  than 10 days  prior to such  Special
         Record Date. Notice of the proposed payment of such Defaulted  Interest
         and the  Special  Record  Date  therefor  having  been so mailed,  such
         Defaulted  Interest  shall be paid to the  Persons  in whose  names the
         Securities of such series (or their respective Predecessor  Securities)
         are registered at the close of business on such Special Record Date and
         shall no longer be payable pursuant to the following clause (b).

                  (b) The Company may make payment of any Defaulted  Interest on
         the   Securities   of  any  series  in  any  other  lawful  manner  not
         inconsistent with the requirements of any securities  exchange on which
         such Securities may be listed,  and upon such notice as may be required
         by such exchange,  if, after notice given by the Company to the Trustee
         of the proposed payment pursuant to this Clause, such manner of payment
         shall be deemed practicable by the Trustee.

         Subject to the  foregoing  provisions  of this  Section,  each Security
delivered  under this Indenture upon  registration of transfer of or in exchange
for or in lieu of any other Security shall carry the rights to interest  accrued
and unpaid, and to accrue, which were carried by such other Security.

         Section 308 Persons Deemed Owners.

         Prior to due  presentment of a Security for  registration  of transfer,
the  Company,  the Trustee and any agent of the Company or the Trustee may treat
the  Person  in whose  name such  Security  is  registered  as the owner of such
Security  for the purpose of  receiving  payment of principal of and any premium
and  (subject to Section  307) any  interest on such  Security and for all other
purposes  whatsoever,  whether or not such Security be overdue,  and neither the
Company,  the  Trustee  nor any agent of the  Company  or the  Trustee  shall be
affected by notice to the contrary.

         Section 309 Cancellation.

         All Securities  surrendered  for payment,  redemption,  registration of
transfer or exchange or for credit  against any sinking fund payment  shall,  if
surrendered  to any Person other than the  Trustee,  be delivered to the Trustee
and shall be promptly  cancelled  by it. The Company may at any time  deliver to
the  Trustee  for  cancellation  any  Securities  previously  authenticated  and
delivered   hereunder  which  the  Company  may  have  acquired  in  any  manner
whatsoever,  and may

                                      -31-
<PAGE>

deliver to the Trustee (or to any other  Person for delivery to the Trustee) for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold,  and all  Securities  so  delivered  shall be  promptly
cancelled by the Trustee.  No Securities shall be authenticated in lieu of or in
exchange for any  Securities  cancelled as provided in this  Section,  except as
expressly  permitted by this  Indenture.  All cancelled  Securities  held by the
Trustee shall be disposed of as directed by a Company Order.

         Section 310 Computation of Interest.

         Except as  otherwise  specified  as  contemplated  by  Section  301 for
Securities  of any series,  interest on the  Securities  of each series shall be
computed on the basis of a 360-day year of twelve 30-day months.

                                  ARTICLE FOUR

                           Satisfaction and Discharge

         Section 401 Satisfaction and Discharge of Indenture.

         This Indenture shall upon Company Request cease to be of further effect
(except as to any surviving  rights of  registration  of transfer or exchange of
Securities  herein expressly  provided for), and the Trustee,  at the expense of
the Company,  shall execute proper  instruments  acknowledging  satisfaction and
discharge of this Indenture, when

                  (a) either

                           (i)  all  Securities  theretofore  authenticated  and
                  delivered   (other  than  (A)   Securities   which  have  been
                  destroyed, lost or stolen and which have been replaced or paid
                  as  provided  in  Section  306 and (B)  Securities  for  whose
                  payment  money  has  theretofore  been  deposited  in trust or
                  segregated  and held in trust by the  Company  and  thereafter
                  repaid  to the  Company  or  discharged  from such  trust,  as
                  provided in Section  1003) have been  delivered to the Trustee
                  for cancellation; or

                           (ii) all such Securities not theretofore delivered to
                  the Trustee for cancellation

                           (A) have become due and payable, or

                           (B) will  become  due and  payable  at  their  Stated
                           Maturity within one year, or

                           (C) are to be called for redemption within one year
                           under  arrangements  satisfactory  to the Trustee for
                           the giving of notice of  redemption by the Trustee in
                           the name, and at the expense, of the Company,

                                      -32-
<PAGE>

         and the Company, in the case of (A), (B) or (C) above, has deposited or
         caused to be deposited with the Trustee as trust funds in trust for the
         purpose  money in an amount  sufficient to pay and discharge the entire
         indebtedness  on  such  Securities  not  theretofore  delivered  to the
         Trustee for cancellation, for principal and any premium and interest to
         the date of such deposit (in the case of  Securities  which have become
         due and payable) or to the Stated  Maturity or Redemption  Date, as the
         case may be;

                  (b) the  Company  has paid or caused to be paid all other sums
         payable hereunder by the Company; and

                  (c) the Company  has  delivered  to the  Trustee an  Officers'
         Certificate and an Opinion of Counsel, each stating that all conditions
         precedent   herein  provided  for  relating  to  the  satisfaction  and
         discharge of this Indenture have been complied with.

         Notwithstanding  the satisfaction and discharge of this Indenture,  the
obligations of the Company to the Trustee under Section 607, the  obligations of
the Trustee to any  Authenticating  Agent under  Section 614 and, if money shall
have been deposited with the Trustee pursuant to subclause (ii) of clause (a) of
this  Section,  the  obligations  of the Trustee  under Section 402 and the last
paragraph of Section 1003 shall survive.

         Section 402 Application of Trust Money.

         Subject to the  provisions of the last  paragraph of Section 1003,  all
money deposited with the Trustee  pursuant to Section 401 shall be held in trust
and applied by it, in accordance  with the provisions of the Securities and this
Indenture,  to  the  payment,  either  directly  or  through  any  Paying  Agent
(including  the  Company  acting as its own  Paying  Agent) as the  Trustee  may
determine, to the Persons entitled thereto, of the principal and any premium and
interest for whose payment such money has been deposited with the Trustee.

                                  ARTICLE FIVE

                                    Remedies

         Section 501 Events of Default.

         "Event of Default",  wherever used herein with respect to Securities of
any series,  means any one of the following events (whatever the reason for such
Event of Default and whether it shall be occasioned by the provisions of Article
Fourteen or be  voluntary or  involuntary  or be effected by operation of law or
pursuant  to any  judgment,  decree or order of any court or any order,  rule or
regulation of any administrative or governmental body):

                  (a) default in the payment of any  interest  upon any Security
         of that series when it becomes due and payable, and continuance of such
         default for a period of 30 days; or

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                  (b) default in the payment of the  principal of or any premium
         on any Security of that series at its Maturity; or

                  (c) default in the deposit of any sinking fund  payment,  when
         and as due by the terms of a Security of that series; or

                  (d) default in the performance,  or breach, of any covenant or
         warranty  of the  Company in this  Indenture  (other than a covenant or
         warranty a default in whose performance or whose breach is elsewhere in
         this  Section  specifically  dealt  with or which  has  expressly  been
         included  in  this  Indenture  solely  for the  benefit  of  series  of
         Securities other than that series),  and continuance of such default or
         breach  for a  period  of 60  days  after  there  has  been  given,  by
         registered  or certified  mail, to the Company by the Trustee or to the
         Company  and the  Trustee by the  Holders of at least 25% in  principal
         amount of the  Outstanding  Securities of that series a written  notice
         specifying  such default or breach and  requiring it to be remedied and
         stating that such notice is a "Notice of Default" hereunder; or

                  (e) the entry by a court having  jurisdiction  in the premises
         of (i) a decree or order for relief in  respect  of the  Company or any
         Restricted  Subsidiary in an involuntary  case or proceeding  under any
         applicable Federal or State bankruptcy,  insolvency,  reorganization or
         other  similar law or (ii) a decree or order  adjudging  the Company or
         any such Restricted Subsidiary a bankrupt or insolvent, or approving as
         properly  filed  a  petition   seeking   reorganization,   arrangement,
         adjustment or  composition  of or in respect of the Company or any such
         Restricted  Subsidiary  under any  applicable  Federal or State law, or
         appointing  a  custodian,  receiver,  liquidator,   assignee,  trustee,
         sequestrator  or other  similar  official  of the  Company  or any such
         Restricted  Subsidiary or of any substantial  part of its property,  or
         ordering  the  winding  up or  liquidation  of  its  affairs,  and  the
         continuance  of any such  decree or order for  relief or any such other
         decree or order  unstayed and in effect for a period of 60  consecutive
         days; or

                  (f)  the   commencement  by  the  Company  or  any  Restricted
         Subsidiary  of a  voluntary  case or  proceeding  under any  applicable
         Federal  or  State  bankruptcy,  insolvency,  reorganization  or  other
         similar  law or of any other case or  proceeding  to be  adjudicated  a
         bankrupt  or  insolvent,  or the  consent  by the  Company  or any such
         Restricted  Subsidiary  to the entry of a decree or order for relief in
         respect  of  the  Company  or  any  such  Restricted  Subsidiary  in an
         involuntary  case or proceeding  under any applicable  Federal or State
         bankruptcy,  insolvency,  reorganization or other similar law or to the
         commencement of any bankruptcy or insolvency case or proceeding against
         the  Company or any such  Restricted  Subsidiary,  or the filing by the
         Company or any such  Restricted  Subsidiary  of a petition or answer or
         consent seeking  reorganization or relief under any applicable  Federal
         or State  law,  or the  consent by the  Company or any such  Restricted
         Subsidiary to the filing of such petition or to the  appointment  of or
         taking  possession  by a  custodian,  receiver,  liquidator,  assignee,
         trustee,  sequestrator or other similar  official of the Company or any
         such Restricted  Subsidiary or of any substantial  part of the property
         of the Company or any such Restricted Subsidiary,  or the making by

                                      -34-
<PAGE>

         the Company or any such Restricted  Subsidiary of an assignment for the
         benefit  of  creditors,  or the  admission  by the  Company or any such
         Restricted  Subsidiary  in  writing of its  inability  to pay its debts
         generally as they become due, or the taking of corporate  action by the
         Company or any such  Restricted  Subsidiary in  furtherance of any such
         action; or

                  (g) any  other  Event of  Default  provided  with  respect  to
         Securities of that series.

         Section 502 Acceleration of Maturity; Rescission and Annulment.

         If an Event of Default  (other  than an Event of Default  specified  in
Section  501(6) or 501(7)) with respect to  Securities of any series at the time
Outstanding occurs and is continuing, then in every such case the Trustee or the
Holders of not less than 25% in principal  amount of the Outstanding  Securities
of that series may declare the  principal  amount of all the  Securities of that
series  (or,  if any  Securities  of that  series are  Original  Issue  Discount
Securities,  such portion of the principal  amount of such  Securities as may be
specified by the terms thereof) to be due and payable  immediately,  by a notice
in writing to the Company (and to the Trustee if given by Holders), and upon any
such  declaration  such  principal  amount (or  specified  amount)  shall become
immediately due and payable.  If an Event of Default  specified in clause (e) or
(f) of  Section  501  with  respect  to  Securities  of any  series  at the time
Outstanding  occurs,  the principal  amount of all the Securities of that series
(or, if any Securities of that series are Original  Issue  Discount  Securities,
such portion of the principal  amount of such  Securities as may be specified by
the terms thereof)  shall  automatically,  and without any  declaration or other
action on the part of the  Trustee or any  Holder,  become  immediately  due and
payable.

         At any time after such a declaration  of  acceleration  with respect to
Securities  of any  series  has been made and  before a  judgment  or decree for
payment of the money due has been obtained by the Trustee as hereinafter in this
Article  provided,  the  Holders  of a  majority  in  principal  amount  of  the
Outstanding  Securities of that series, by written notice to the Company and the
Trustee, may rescind and annul such declaration and its consequences if

                  (a) the Company has paid or  deposited  with the Trustee a sum
         sufficient to pay

                           (i) all overdue  interest on all  Securities  of that
                  series,

                           (ii) the principal of (and  premium,  if any, on) any
                  Securities of that series which have become due otherwise than
                  by such  declaration of acceleration  and any interest thereon
                  at the rate or rates prescribed therefor in such Securities,

                           (iii) to the extent that payment of such  interest is
                  lawful,  interest  upon overdue  interest at the rate or rates
                  prescribed therefor in such Securities, and

                                      -35-
<PAGE>

                           (iv)  all  sums  paid  or  advanced  by  the  Trustee
                  hereunder   and   the   reasonable   compensation,   expenses,
                  disbursements  and  advances  of the  Trustee,  its agents and
                  counsel; and

                  (b) all Events of Default with respect to  Securities  of that
         series,  other than the  non-payment  of the principal of Securities of
         that  series  which  have  become  due  solely by such  declaration  of
         acceleration, have been cured or waived as provided in Section 513.

No such  rescission  shall  affect  any  subsequent  default or impair any right
consequent thereon.

The Trustee shall not be required to act upon an Event of Default  unless it has
actual knowledge of such Event of Default.

         Section 503  Collection of  Indebtedness  and Suits for  Enforcement by
Trustee.

         The Company covenants that if

                  (a)  default  is made in the  payment of any  interest  on any
         Security  when such  interest  becomes due and payable and such default
         continues for a period of 30 days, or

                  (b)  default is made in the  payment of the  principal  of (or
         premium, if any, on) any Security at the Maturity thereof,

the Company will, upon demand of the Trustee,  pay to it, for the benefit of the
Holders  of such  Securities,  the whole  amount  then due and  payable  on such
Securities  for  principal  and any premium and interest and, to the extent that
payment of such interest shall be legally  enforceable,  interest on any overdue
principal  and  premium  and on any  overdue  interest,  at the  rate  or  rates
prescribed therefor in such Securities,  and, in addition thereto,  such further
amount as shall be  sufficient  to cover the costs and  expenses of  collection,
including the reasonable compensation,  expenses,  disbursements and advances of
the Trustee, its agents and counsel.

         If an Event of Default with respect to  Securities of any series occurs
and is  continuing,  the  Trustee may in its  discretion  proceed to protect and
enforce its rights and the rights of the Holders of Securities of such series by
such appropriate  judicial  proceedings as the Trustee shall deem most effectual
to protect and enforce any such rights,  whether for the specific enforcement of
any  covenant or  agreement  in this  Indenture or in aid of the exercise of any
power granted herein, or to enforce any other proper remedy.

         Section 504 Trustee May File Proofs of Claim.

         In case of any  judicial  proceeding  relative  to the  Company (or any
other obligor upon the Securities),  its property or its creditors,  the Trustee
shall  be  entitled  and  empowered,  by  intervention  in  such  proceeding  or
otherwise,  to take any and all actions authorized under the Trust Indenture Act
in order to have  claims of the  Holders  and the  Trustee  allowed  in any such
proceeding.  In  particular,  the  Trustee  shall be  authorized  to collect and
receive any moneys or

                                      -36-
<PAGE>

other  property  payable or deliverable on any such claims and to distribute the
same; and any custodian,  receiver, assignee, trustee, liquidator,  sequestrator
or other similar official in any such judicial  proceeding is hereby  authorized
by each Holder to make such  payments to the Trustee  and, in the event that the
Trustee shall consent to the making of such payments directly to the Holders, to
pay to the Trustee any amount due it for the reasonable compensation,  expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 607.

         No provision of this Indenture shall be deemed to authorize the Trustee
to  authorize  or consent to or accept or adopt on behalf of any Holder any plan
of  reorganization,   arrangement,   adjustment  or  composition  affecting  the
Securities  or the rights of any Holder  thereof or to authorize  the Trustee to
vote in  respect of the claim of any  Holder in any such  proceeding;  provided,
however,  that the Trustee may, on behalf of the Holders,  vote for the election
of a trustee in bankruptcy  or similar  official and be a member of a creditors'
or other similar committee.

         Section  505  Trustee  May  Enforce   Claims   Without   Possession  of
Securities.

         All rights of action and claims under this  Indenture or the Securities
may be prosecuted  and enforced by the Trustee  without the possession of any of
the Securities or the production thereof in any proceeding relating thereto, and
any such  proceeding  instituted by the Trustee shall be brought in its own name
as trustee of an express  trust,  and any  recovery  of  judgment  shall,  after
provision   for  the   payment  of  the   reasonable   compensation,   expenses,
disbursements  and advances of the Trustee,  its agents and counsel,  be for the
ratable  benefit  of the  Holders  of the  Securities  in  respect of which such
judgment has been recovered.

         Section 506 Application of Money Collected.

         Any money  collected by the Trustee  pursuant to this Article  shall be
applied in the following  order,  at the date or dates fixed by the Trustee and,
in case of the distribution of such money on account of principal or any premium
or interest, upon presentation of the Securities and the notation thereon of the
payment if only partially paid and upon surrender thereof if fully paid:

         FIRST: To the payment of all amounts due the Trustee under Section 607;

         SECOND: To the extent provided in Article  Fourteen,  to the holders of
Senior Debt of the Company in accordance with Article Fourteen; and

         THIRD:  To the payment of the amounts then due and unpaid for principal
of and any premium and interest on the Securities in respect of which or for the
benefit of which such money has been collected,  ratably,  without preference or
priority  of any  kind,  according  to the  amounts  due  and  payable  on  such
Securities for principal and any premium and interest, respectively.

                                      -37-
<PAGE>

         Section 507 Limitation on Suits.

         No  Holder  of any  Security  of any  series  shall  have any  right to
institute any proceeding, judicial or otherwise, with respect to this Indenture,
or for the  appointment  of a  receiver  or  trustee,  or for any  other  remedy
hereunder, unless

                  (a) such Holder has  previously  given  written  notice to the
         Trustee of a continuing Event of Default with respect to the Securities
         of that series;

                  (b) the  Holders of not less than 25% in  principal  amount of
         the  Outstanding  Securities  of that  series  shall have made  written
         request to the  Trustee  to  institute  proceedings  in respect of such
         Event of Default in its own name as Trustee hereunder;

                  (c)  such  Holder  or  Holders  have  offered  to the  Trustee
         reasonable indemnity against the costs,  expenses and liabilities to be
         incurred in compliance with such request;

                  (d) the Trustee for 60 days after its receipt of such  notice,
         request  and  offer of  indemnity  has  failed  to  institute  any such
         proceeding; and

                  (e) no direction  inconsistent  with such written  request has
         been given to the Trustee during such 60-day period by the Holders of a
         majority in  principal  amount of the  Outstanding  Securities  of that
         series;

it being  understood and intended that no one or more of such Holders shall have
any right in any manner  whatever by virtue of, or by availing of, any provision
of this  Indenture to affect,  disturb or  prejudice  the rights of any other of
such Holders,  or to obtain or to seek to obtain priority or preference over any
other of such  Holders or to enforce any right under this  Indenture,  except in
the manner herein  provided and for the equal and ratable benefit of all of such
Holders.

         Section  508  Unconditional  Right of  Holders  to  Receive  Principal,
Premium and Interest.

         Notwithstanding  any other provision in this  Indenture,  the Holder of
any  Security  shall have the right,  which is absolute  and  unconditional,  to
receive payment of the principal of and any premium and (subject to Section 307)
interest on such Security on the respective Stated Maturities  expressed in such
Security  (or,  in the  case  of  redemption,  on the  Redemption  Date)  and to
institute suit for the  enforcement  of any such payment,  and such rights shall
not be impaired without the consent of such Holder.

         Section 509 Restoration of Rights and Remedies.

         If the Trustee or any Holder has  instituted  any proceeding to enforce
any  right  or  remedy  under  this  Indenture  and  such  proceeding  has  been
discontinued or abandoned for any reason,  or has been  determined  adversely to
the  Trustee or to such  Holder,  then and in every  such  case,  subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
be restored  severally and respectively to their former positions  hereunder and
thereafter all rights

                                      -38-
<PAGE>

and  remedies of the Trustee  and the Holders  shall  continue as though no such
proceeding had been instituted.

         Section 510 Rights and Remedies Cumulative.

         Except as otherwise provided with respect to the replacement or payment
of mutilated,  destroyed,  lost or stolen  Securities  in the last  paragraph of
Section 306, no right or remedy herein conferred upon or reserved to the Trustee
or to the Holders is intended to be exclusive of any other right or remedy,  and
every right and remedy shall, to the extent  permitted by law, be cumulative and
in addition to every other right and remedy given  hereunder or now or hereafter
existing at law or in equity or  otherwise.  The  assertion or employment of any
right or remedy  hereunder,  or  otherwise,  shall not  prevent  the  concurrent
assertion or employment of any other appropriate right or remedy.

         Section 511 Delay or Omission Not Waiver.

         No delay or omission of the Trustee or of any Holder of any  Securities
to exercise any right or remedy  accruing upon any Event of Default shall impair
any such right or remedy or  constitute a waiver of any such Event of Default or
an acquiescence therein.  Every right and remedy given by this Article or by law
to the  Trustee or to the  Holders may be  exercised  from time to time,  and as
often as may be deemed expedient,  by the Trustee or by the Holders, as the case
may be.

         Section 512 Control by Holders.

         The  Holders  of a  majority  in  principal  amount of the  Outstanding
Securities  of any series  shall  have the right to direct the time,  method and
place of conducting any proceeding for any remedy  available to the Trustee,  or
exercising  any trust or power  conferred  on the  Trustee,  with respect to the
Securities of such series, provided that

                  (a) such  direction  shall not be in conflict with any rule of
         law or with this Indenture, and

                  (b) the Trustee may take any other action deemed proper by the
         Trustee which is not inconsistent with such direction.

         Section 513 Waiver of Past Defaults.

         The  Holders of not less than a  majority  in  principal  amount of the
Outstanding  Securities  of any series  may on behalf of the  Holders of all the
Securities of such series waive any past default  hereunder with respect to such
series and its consequences, except a default

                  (a) in the  payment  of the  principal  of or any  premium  or
         interest on any Security of such series, or

                                      -39-
<PAGE>

                  (b) in respect of a covenant or  provision  hereof which under
         Article  Nine cannot be modified or amended  without the consent of the
         Holder of each Outstanding Security of such series affected.

         Upon any such waiver,  such default shall cease to exist, and any Event
of  Default  arising  therefrom  shall be deemed to have been  cured,  for every
purpose of this Indenture;  but no such waiver shall extend to any subsequent or
other default or impair any right consequent thereon.

         Section 514 Undertaking for Costs.

         In any suit for the  enforcement  of any  right or  remedy  under  this
Indenture,  or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an  undertaking to pay the costs of such suit, and may assess costs against
any such party  litigant,  in the manner and to the extent provided in the Trust
Indenture  Act;  provided that neither this Section nor the Trust  Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company.

         Section 515 Waiver of Usury, Stay or Extension Laws.

         The Company  covenants  (to the extent that it may lawfully do so) that
it will not at any time insist upon, or plead, or in any manner whatsoever claim
or take the benefit or advantage  of, any usury,  stay or extension law wherever
enacted,  now or at any time hereafter in force,  which may affect the covenants
or the performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such law
and  covenants  that it will not hinder,  delay or impede the  execution  of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                                  ARTICLE SIX

                                   The Trustee

         Section 601 Certain Duties and Responsibilities.

         The duties and  responsibilities of the Trustee shall be as provided by
the Trust  Indenture Act.  Notwithstanding  the foregoing,  no provision of this
Indenture shall require the Trustee to expend or risk its own funds or otherwise
incur any financial liability in the performance of any of its duties hereunder,
or in the exercise of any of its rights or powers,  if it shall have  reasonable
grounds for believing that repayment of such funds or adequate indemnity against
such risk or liability is not  reasonably  assured to it. Whether or not therein
expressly so provided, every provision of this Indenture relating to the conduct
or affecting  the  liability of or affording  protection to the Trustee shall be
subject to the provisions of this Section.

                                      -40-
<PAGE>

         Section 602 Notice of Defaults.

         If a default occurs hereunder with respect to Securities of any series,
the Trustee  shall give the Holders of  Securities of such series notice of such
default as and to the extent  provided  by the Trust  Indenture  Act;  provided,
however,  that in the case of any default of the  character  specified in clause
(d) of Section 501 with respect to Securities of such series,  no such notice to
Holders shall be given until at least 30 days after the occurrence thereof.  For
the purpose of this  Section,  the term  "default"  means any event which is, or
after  notice or lapse of time or both would  become,  an Event of Default  with
respect to Securities of such series.

         Section 603 Certain Rights of Trustee.

         Subject to the provisions of Section 601:

                  (a) the Trustee may rely and shall be  protected  in acting or
         refraining  from acting upon any  resolution,  certificate,  statement,
         instrument,  opinion,  report,  notice,  request,  direction,  consent,
         order, bond,  debenture,  note, other evidence of indebtedness or other
         paper or document  believed by it to be genuine and to have been signed
         or presented by the proper party or parties;

                  (b) any request or direction of the Company  mentioned  herein
         shall be sufficiently  evidenced by a Company Request or Company Order,
         and any  resolution  of the Board of  Directors  shall be  sufficiently
         evidenced by a Board Resolution;

                  (c)  whenever  in the  administration  of this  Indenture  the
         Trustee shall deem it desirable  that a matter be proved or established
         prior to  taking,  suffering  or  omitting  any action  hereunder,  the
         Trustee (unless other evidence be herein specifically  prescribed) may,
         in the  absence  of bad  faith  on its  part,  rely  upon an  Officers'
         Certificate;

                  (d) the  Trustee  may  consult  with  counsel  and the written
         advice of such  counsel or any  Opinion  of  Counsel  shall be full and
         complete  authorization  and protection in respect of any action taken,
         suffered  or omitted  by it  hereunder  in good  faith and in  reliance
         thereon;

                  (e) the Trustee  shall be under no  obligation to exercise any
         of the rights or powers  vested in it by this  Indenture at the request
         or direction of any of the Holders  pursuant to this Indenture,  unless
         such Holders shall have offered to the Trustee  reasonable  security or
         indemnity  against the costs,  expenses and liabilities  which might be
         incurred by it in compliance with such request or direction;

                  (f) the Trustee  shall not be bound to make any  investigation
         into the  facts  or  matters  stated  in any  resolution,  certificate,
         statement,  instrument,  opinion,  report, notice, request,  direction,
         consent,  order, bond, debenture,  note, other evidence of indebtedness
         or other paper or document,  but the Trustee,  in its  discretion,  may
         make such further inquiry or  investigation  into such facts or matters
         as it may see fit,  and, if the Trustee  shall  determine  to make such
         further inquiry or  investigation,  it shall be entitled to

                                      -41-
<PAGE>

         examine the books,  records and premises of the Company,  personally or
         by agent or attorney; and

                  (g) the  Trustee  may  execute  any of the  trusts  or  powers
         hereunder  or perform  any duties  hereunder  either  directly or by or
         through  agents or attorneys and the Trustee  shall not be  responsible
         for any  misconduct  or negligence on the part of any agent or attorney
         appointed with due care by it hereunder.

         Section 604 Not Responsible for Recitals or Issuance of Securities.

         The  recitals  contained  herein  and in  the  Securities,  except  the
Trustee's  certificates of  authentication,  shall be taken as the statements of
the Company,  and neither the Trustee nor any  Authenticating  Agent assumes any
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Indenture or of the Securities.  Neither the
Trustee  nor  any  Authenticating  Agent  shall  be  accountable  for the use or
application by the Company of Securities or the proceeds thereof.

         Section 605 May Hold Securities.

         The Trustee,  any Authenticating  Agent, any Paying Agent, any Security
Registrar  or any other agent of the  Company,  in its  individual  or any other
capacity, may become the owner or pledgee of Securities and, subject to Sections
608 and 613, may  otherwise  deal with the Company with the same rights it would
have if it were  not  Trustee,  Authenticating  Agent,  Paying  Agent,  Security
Registrar or such other agent.

         Section 606 Money Held in Trust.

         Money held by the  Trustee in trust  hereunder  need not be  segregated
from other  funds  except to the extent  required by law.  The Trustee  shall be
under no liability for interest on any money received by it hereunder  except as
otherwise agreed with the Company.

         Section 607 Compensation and Reimbursement.

         The Company agrees

                  (1) to pay  to  the  Trustee  from  time  to  time  reasonable
         compensation   for  all  services   rendered  by  it  hereunder  (which
         compensation  shall not be limited by any provision of law in regard to
         the compensation of a trustee of an express trust);

                  (2)  except  as  otherwise   expressly   provided  herein,  to
         reimburse  the Trustee  upon its request for all  reasonable  expenses,
         disbursements   and  advances  incurred  or  made  by  the  Trustee  in
         accordance  with  any  provision  of  this  Indenture   (including  the
         reasonable  compensation  and the  expenses  and  disbursements  of its
         agents and counsel),  except any such expense,  disbursement or advance
         as may be attributable to its negligence or bad faith; and

                                      -42-
<PAGE>

                  (3) to  indemnify  the  Trustee  for,  and to hold it harmless
         against,  any loss, liability or expense incurred without negligence or
         bad  faith  on its  part,  arising  out of or in  connection  with  the
         acceptance  or   administration  of  the  trust  or  trusts  hereunder,
         including the costs and expenses of defending  itself against any claim
         or liability in connection  with the exercise or  performance of any of
         its powers or duties hereunder.

         Section 608 Conflicting Interests.

         If the Trustee has or shall acquire a conflicting  interest  within the
meaning of the Trust  Indenture  Act, the Trustee  shall either  eliminate  such
interest or resign,  to the extent and in the manner provided by, and subject to
the provisions  of, the Trust  Indenture Act and this  Indenture.  To the extent
permitted  by such Act,  the Trustee  shall not be deemed to have a  conflicting
interest  by virtue of being a trustee  under  this  Indenture  with  respect to
Securities  of more than one series  [or a trustee  under -- list here any prior
indentures  between the Company and the Trustee that have not been satisfied and
discharged  and that may be excluded by the proviso to Section  310(b)(1) of the
Trust Indenture Act].

         Section 609 Corporate Trustee Required; Eligibility.

         There shall at all times be one (and only one) Trustee  hereunder  with
respect to the  Securities  of each series,  which may be Trustee  hereunder for
Securities of one or more other  series.  Each Trustee shall be a Person that is
eligible  pursuant to the Trust Indenture Act to act as such, and has a combined
capital and surplus of at least  $50,000,000  and has its Corporate Trust Office
in the Borough of Manhattan,  The City of New York. If any such Person publishes
reports of condition at least annually,  pursuant to law or to the  requirements
of its supervising or examining authority, then for the purposes of this Section
and to the extent permitted by the Trust Indenture Act, the combined capital and
surplus of such Person shall be deemed to be its combined capital and surplus as
set forth in its most recent  report of condition so  published.  If at any time
the  Trustee  with  respect to the  Securities  of any series  shall cease to be
eligible in accordance  with the  provisions  of this  Section,  it shall resign
immediately  in the  manner and with the effect  hereinafter  specified  in this
Article.

         Section 610 Resignation and Removal; Appointment of Successor.

         No  resignation  or  removal of the  Trustee  and no  appointment  of a
successor  Trustee  pursuant to this Article  shall become  effective  until the
acceptance  of  appointment  by the  successor  Trustee in  accordance  with the
applicable requirements of Section 611.

         The Trustee may resign at any time with  respect to the  Securities  of
one or more  series by giving  written  notice  thereof to the  Company.  If the
instrument of acceptance  by a successor  Trustee  required by Section 611 shall
not have been  delivered to the Trustee  within 30 days after the giving of such
notice of resignation, the resigning Trustee may petition any court of competent
jurisdiction  for the  appointment  of a successor  Trustee  with respect to the
Securities of such series.

                                      -43-
<PAGE>

         The Trustee may be removed at any time with  respect to the  Securities
of any series by Act of the  Holders of a majority  in  principal  amount of the
Outstanding  Securities  of such  series,  delivered  to the  Trustee and to the
Company.

         If at any time:

                  (1) the Trustee  shall fail to comply  with  Section 608 after
         written request therefor by the Company or by any Holder who has been a
         bona fide Holder of a Security for at least six months, or

                  (2) the Trustee  shall cease to be eligible  under Section 609
         and shall fail to resign after written request  therefor by the Company
         or by any such Holder, or

                  (3) the Trustee  shall become  incapable of acting or shall be
         adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
         property  shall be appointed or any public officer shall take charge or
         control of the Trustee or of its property or affairs for the purpose of
         rehabilitation, conservation or liquidation,

then,  in any such case,  (A) the Company by a Board  Resolution  may remove the
Trustee  with  respect to all  Securities,  or (B) subject to Section  514,  any
Holder  who has been a bona fide  Holder of a  Security  for at least six months
may, on behalf of himself and all others similarly situated,  petition any court
of  competent  jurisdiction  for the removal of the Trustee  with respect to all
Securities and the appointment of a successor Trustee or Trustees.

         If the Trustee shall resign,  be removed or become incapable of acting,
or if a vacancy shall occur in the office of Trustee for any cause, with respect
to the  Securities of one or more series,  the Company,  by a Board  Resolution,
shall  promptly  appoint a  successor  Trustee or Trustees  with  respect to the
Securities of that or those series (it being  understood that any such successor
Trustee may be appointed with respect to the Securities of one or more or all of
such series and that at any time there shall be only one Trustee with respect to
the  Securities of any  particular  series) and shall comply with the applicable
requirements of Section 611. If, within one year after such resignation, removal
or  incapability,  or the occurrence of such vacancy,  a successor  Trustee with
respect to the Securities of any series shall be appointed by Act of the Holders
of a majority in principal  amount of the Outstanding  Securities of such series
delivered  to the Company and the retiring  Trustee,  the  successor  Trustee so
appointed shall, forthwith upon its acceptance of such appointment in accordance
with the applicable  requirements of Section 611,  become the successor  Trustee
with respect to the  Securities of such series and to that extent  supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the  Securities  of any series shall have been so appointed by the Company or
the Holders and accepted  appointment in the manner required by Section 611, any
Holder who has been a bona fide Holder of a Security of such series for at least
six months may, on behalf of himself and all others similarly situated, petition
any court of competent  jurisdiction for the appointment of a successor  Trustee
with respect to the Securities of such series.

                                      -44-
<PAGE>

         The Company shall give notice of each  resignation  and each removal of
the Trustee with respect to the Securities of any series and each appointment of
a successor  Trustee with respect to the Securities of any series to all Holders
of Securities of such series in the manner  provided in Section 106. Each notice
shall include the name of the successor  Trustee with respect to the  Securities
of such series and the address of its Corporate Trust Office.

         Section 611 Acceptance of Appointment by Successor.

         In  case of the  appointment  hereunder  of a  successor  Trustee  with
respect to all  Securities,  every such  successor  Trustee so  appointed  shall
execute,  acknowledge and deliver to the Company and to the retiring  Trustee an
instrument accepting such appointment,  and thereupon the resignation or removal
of the retiring  Trustee  shall become  effective  and such  successor  Trustee,
without any further act,  deed or  conveyance,  shall become vested with all the
rights,  powers,  trusts and duties of the retiring Trustee; but, on the request
of the Company or the successor  Trustee,  such  retiring  Trustee  shall,  upon
payment of its charges,  execute and deliver an instrument  transferring to such
successor Trustee all the rights,  powers and trusts of the retiring Trustee and
shall duly assign,  transfer and deliver to such successor  Trustee all property
and money held by such retiring Trustee hereunder.

         In  case of the  appointment  hereunder  of a  successor  Trustee  with
respect to the Securities of one or more (but not all) series, the Company,  the
retiring  Trustee and each  successor  Trustee with respect to the Securities of
one or more series shall  execute and deliver an indenture  supplemental  hereto
wherein each successor Trustee shall accept such appointment and which (a) shall
contain  such  provisions  as shall be  necessary  or  desirable to transfer and
confirm to, and to vest in,  each  successor  Trustee  all the  rights,  powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series to which the appointment of such successor Trustee relates,  (b)
if the retiring  Trustee is not retiring with respect to all  Securities,  shall
contain  such  provisions  as shall be deemed  necessary or desirable to confirm
that all the rights,  powers,  trusts and duties of the  retiring  Trustee  with
respect  to the  Securities  of that or those  series as to which  the  retiring
Trustee is not retiring shall continue to be vested in the retiring Trustee, and
(c) shall add to or change any of the  provisions of this  Indenture as shall be
necessary  to  provide  for or  facilitate  the  administration  of  the  trusts
hereunder by more than one Trustee,  it being  understood that nothing herein or
in such supplemental indenture shall constitute such Trustees co-trustees of the
same  trust and that each such  Trustee  shall be  trustee  of a trust or trusts
hereunder separate and apart from any trust or trusts hereunder  administered by
any other such Trustee; and upon the execution and delivery of such supplemental
indenture  the  resignation  or removal of the  retiring  Trustee  shall  become
effective  to the  extent  provided  therein  and each such  successor  Trustee,
without any further act,  deed or  conveyance,  shall become vested with all the
rights,  powers,  trusts and duties of the retiring  Trustee with respect to the
Securities of that or those series to which the  appointment  of such  successor
Trustee relates;  but, on request of the Company or any successor Trustee,  such
retiring  Trustee  shall duly  assign,  transfer  and deliver to such  successor
Trustee all  property and money held by such  retiring  Trustee  hereunder  with
respect to the  Securities of that or those series to which the  appointment  of
such successor Trustee relates.

                                      -45-
<PAGE>

         Upon request of any such successor  Trustee,  the Company shall execute
any and all instruments  for more fully and certainly  vesting in and confirming
to such successor Trustee all such rights,  powers and trusts referred to in the
first or second preceding paragraph, as the case may be.

         No successor Trustee shall accept its appointment unless at the time of
such  acceptance  such  successor  Trustee shall be qualified and eligible under
this Article.

         Section  612  Merger,   Conversion,   Consolidation  or  Succession  to
Business.

         Any  corporation  into which the Trustee may be merged or  converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion  or  consolidation  to which  the  Trustee  shall be a party,  or any
corporation  succeeding to all or substantially all the corporate trust business
of the Trustee,  shall be the successor of the Trustee hereunder,  provided such
corporation  shall be  otherwise  qualified  and  eligible  under this  Article,
without the  execution  or filing of any paper or any further act on the part of
any of the parties hereto. In case any Securities shall have been authenticated,
but not  delivered,  by the Trustee  then in office,  any  successor  by merger,
conversion  or  consolidation  to such  authenticating  Trustee  may adopt  such
authentication  and deliver the Securities so authenticated with the same effect
as if such successor Trustee had itself authenticated such Securities.

         Section 613 Preferential Collection of Claims Against Company.

         If and when the  Trustee  shall be or become a creditor  of the Company
(or any other obligor upon the Securities),  the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims against
the Company (or any such other obligor).

         Section 614 Appointment of Authenticating Agent.

         The Trustee may appoint an Authenticating  Agent or Agents with respect
to one or more series of  Securities  which shall be authorized to act on behalf
of the Trustee to  authenticate  Securities  of such series issued upon original
issue and upon exchange,  registration of transfer or partial redemption thereof
or pursuant to Section 306, and Securities so authenticated shall be entitled to
the  benefits  of this  Indenture  and  shall be valid  and  obligatory  for all
purposes as if authenticated  by the Trustee  hereunder.  Wherever  reference is
made in this Indenture to the  authentication  and delivery of Securities by the
Trustee or the Trustee's certificate of authentication,  such reference shall be
deemed to include  authentication  and  delivery  on behalf of the Trustee by an
Authenticating  Agent and a certificate of authentication  executed on behalf of
the  Trustee by an  Authenticating  Agent.  Each  Authenticating  Agent shall be
acceptable to the Company and shall at all times be a corporation  organized and
doing business under the laws of the United States of America, any State thereof
or the District of Columbia, authorized under such laws to act as Authenticating
Agent,  having a combined  capital and surplus of not less than  $50,000,000 and
subject to supervision or  examination  by Federal or State  authority.  If such
Authenticating Agent publishes reports of condition at least annually,  pursuant
to law or to the requirements of said supervising or examining  authority,  then
for the  purposes  of this  Section,

                                      -46-
<PAGE>

the combined capital and surplus of such Authenticating Agent shall be deemed to
be its  combined  capital and surplus as set forth in its most recent  report of
condition so published. If at any time an Authenticating Agent shall cease to be
eligible in accordance with the provisions of this Section,  such Authenticating
Agent shall resign  immediately  in the manner and with the effect  specified in
this Section.

         Any  corporation  into which an  Authenticating  Agent may be merged or
converted or with which it may be  consolidated,  or any  corporation  resulting
from any merger,  conversion or consolidation to which such Authenticating Agent
shall be a party,  or any  corporation  succeeding  to the  corporate  agency or
corporate  trust business of an  Authenticating  Agent,  shall continue to be an
Authenticating  Agent,  provided such  corporation  shall be otherwise  eligible
under this Section,  without the execution or filing of any paper or any further
act on the part of the Trustee or the Authenticating Agent.

         An Authenticating Agent may resign at any time by giving written notice
thereof to the Trustee and to the Company. The Trustee may at any time terminate
the agency of an  Authenticating  Agent by giving written notice thereof to such
Authenticating  Agent  and to the  Company.  Upon  receiving  such a  notice  of
resignation  or  upon  such  a  termination,   or  in  case  at  any  time  such
Authenticating  Agent  shall  cease  to  be  eligible  in  accordance  with  the
provisions of this Section,  the Trustee may appoint a successor  Authenticating
Agent  which  shall be  acceptable  to the Company and shall give notice of such
appointment  in the manner  provided in Section 106 to all Holders of Securities
of the series with respect to which such  Authenticating  Agent will serve.  Any
successor  Authenticating  Agent upon  acceptance of its  appointment  hereunder
shall become  vested with all the rights,  powers and duties of its  predecessor
hereunder,  with like effect as if originally named as an Authenticating  Agent.
No successor  Authenticating  Agent shall be appointed unless eligible under the
provisions of this Section.

         The  Trustee  agrees to pay to each  Authenticating  Agent from time to
time  reasonable  compensation  for its  services  under this  Section,  and the
Trustee shall be entitled to be  reimbursed  for such  payments,  subject to the
provisions of Section 607.

         If an  appointment  with respect to one or more series is made pursuant
to this Section,  the  Securities of such series may have endorsed  thereon,  in
addition  to  the  Trustee's  certificate  of  authentication,   an  alternative
certificate of authentication in the following form:

                                      -47-
<PAGE>

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                                              ..........................,
                                                              As Trustee



                                              By........................,
                                                  As Authenticating Agent



                                              By.........................
                                                       Authorized Officer



                                 ARTICLE SEVEN

                Holders' Lists and Reports by Trustee and Company

         Section 701 Company to Furnish Trustee Names and Addresses of Holders.

         The Company will furnish or cause to be furnished to the Trustee

                  (a)  semi-annually,  not later than  January 15 and July 15 in
         each year, a list, in such form as the Trustee may reasonably  require,
         of the names and  addresses of the Holders of Securities of each series
         as of the preceding December 31 or June 30, as the case may be, and

                  (b) at such other times as the Trustee may request in writing,
         within 30 days after the receipt by the Company of any such request,  a
         list of  similar  form and  content  as of a date not more than 15 days
         prior to the time such list is furnished;

excluding from any such list names and addresses  received by the Trustee in its
capacity as Security Registrar.

         Section 702 Preservation of Information; Communications to Holders.

         The  Trustee  shall  preserve,  in as  current a form as is  reasonably
practicable,  the names and  addresses  of Holders  contained in the most recent
list  furnished  to the  Trustee as  provided  in Section  701 and the names and
addresses  of Holders  received  by the  Trustee  in its  capacity  as  Security
Registrar.  The  Trustee may  destroy  any list  furnished  to it as provided in
Section 701 upon receipt of a new list so furnished.

                                      -48-
<PAGE>

         The rights of Holders to communicate with other Holders with respect to
their rights under this Indenture or under the Securities, and the corresponding
rights  and  privileges  of the  Trustee,  shall  be as  provided  by the  Trust
Indenture Act.

         Every Holder of Securities,  by receiving and holding the same,  agrees
with the Company and the  Trustee  that  neither the Company nor the Trustee nor
any  agent  of  either  of them  shall  be held  accountable  by  reason  of any
disclosure of  information as to names and addresses of Holders made pursuant to
the Trust Indenture Act.

         Section 703 Reports by Trustee.

         The Trustee  shall  transmit to Holders  such  reports  concerning  the
Trustee and its actions under this Indenture as may be required  pursuant to the
Trust Indenture Act at the times and in the manner provided pursuant thereto.

         A copy of each such report shall,  at the time of such  transmission to
Holders,  be filed by the  Trustee  with  each  stock  exchange  upon  which any
Securities are listed,  with the  Commission  and with the Company.  The Company
will notify the Trustee when any Securities are listed on any stock exchange.

         Section 704 Reports by Company.

         The  Company  shall  file  with the  Trustee  and the  Commission,  and
transmit to Holders,  such  information,  documents and other reports,  and such
summaries thereof, as may be required pursuant to the Trust Indenture Act at the
times and in the manner  provided  pursuant to such Act;  provided that any such
information,  documents  or reports  required  to be filed  with the  Commission
pursuant  to  Section  13 or 15(d) of the  Exchange  Act shall be filed with the
Trustee  within  15 days  after  the same is so  required  to be filed  with the
Commission.

                                 ARTICLE EIGHT

              Consolidation, Merger, Conveyance, Transfer or Lease

         Section 801 Company May Consolidate, Etc., Only on Certain Terms.

         The Company shall not  consolidate  with or merge into any other Person
or convey,  transfer  or lease its  properties  and assets  substantially  as an
entirety  to any  Person,  and the  Company  shall  not  permit  any  Person  to
consolidate  with or merge into the  Company or  convey,  transfer  or lease its
properties and assets substantially as an entirety to the Company, unless:

                  (a) in case the Company shall  consolidate  with or merge into
         another  Person or convey,  transfer or lease its properties and assets
         substantially  as an entirety to any Person,  the Person formed by such
         consolidation  or into which the Company is merged or the Person  which
         acquires by conveyance or transfer, or which leases, the properties and
         assets  of  the  Company  substantially  as  an  entirety  shall  be  a
         corporation,  partnership, limited liability company or trust, shall be
         organized and validly  existing  under the laws

                                      -49-
<PAGE>

         of the United  States of America,  any State thereof or the District of
         Columbia  and shall  expressly  assume,  by an  indenture  supplemental
         hereto,  executed and delivered to the Trustee, in form satisfactory to
         the Trustee,  the due and punctual  payment of the principal of and any
         premium  and  interest on all the  Securities  and the  performance  or
         observance  of  every  covenant  of this  Indenture  on the part of the
         Company to be performed or observed;

                  (b)  immediately  after giving effect to such  transaction and
         treating any indebtedness which becomes an obligation of the Company or
         any Subsidiary as a result of such  transaction as having been incurred
         by the Company or such Subsidiary at the time of such  transaction,  no
         Event of Default,  and no event which, after notice or lapse of time or
         both,  would  become an Event of Default,  shall have  happened  and be
         continuing;

                  (c) if,  as a result  of any such  consolidation  or merger or
         such conveyance, transfer or lease, properties or assets of the Company
         would become subject to a mortgage,  pledge, lien, security interest or
         other encumbrance  which would not be permitted by this Indenture,  the
         Company or such successor  Person,  as the case may be, shall take such
         steps  as shall be  necessary  effectively  to  secure  the  Securities
         equally  and  ratably  with  (or  prior  to) all  indebtedness  secured
         thereby; and

                  (d) the Company  has  delivered  to the  Trustee an  Officers'
         Certificate  and  an  Opinion  of  Counsel,   each  stating  that  such
         consolidation,   merger,  conveyance,  transfer  or  lease  and,  if  a
         supplemental indenture is required in connection with such transaction,
         such  supplemental  indenture  comply  with this  Article  and that all
         conditions  precedent  herein provided for relating to such transaction
         have been complied with.

         Section 802 Successor Substituted.

         Upon any  consolidation  of the Company  with, or merger of the Company
into,  any other Person or any  conveyance,  transfer or lease of the properties
and assets of the  Company  substantially  as an  entirety  in  accordance  with
Section 801, the successor Person formed by such consolidation or into which the
Company is merged or to which such  conveyance,  transfer or lease is made shall
succeed to, and be  substituted  for, and may exercise every right and power of,
the  Company  under this  Indenture  with the same  effect as if such  successor
Person had been named as the Company herein, and thereafter,  except in the case
of a lease,  the  predecessor  Person shall be relieved of all  obligations  and
covenants under this Indenture and the Securities.

                                  ARTICLE NINE

                             Supplemental Indentures

         Section 901 Supplemental Indentures Without Consent of Holders.

         Without the consent of any Holders,  the Company,  when authorized by a
Board Resolution,  and the Trustee, at any time and from time to time, may enter
into one or more

                                      -50-
<PAGE>

indentures  supplemental hereto, in form satisfactory to the Trustee, for any of
the following purposes:

                  (a) to  evidence  the  succession  of  another  Person  to the
         Company and the  assumption  by any such  successor of the covenants of
         the Company herein and in the Securities; or

                  (b) to add to the  covenants of the Company for the benefit of
         the Holders of all or any series of Securities  (and if such  covenants
         are to be for the  benefit  of less  than  all  series  of  Securities,
         stating that such covenants are expressly being included solely for the
         benefit  of such  series)  or to  surrender  any right or power  herein
         conferred upon the Company; or

                  (c) to add any additional Events of Default for the benefit of
         the Holders of all or any series of Securities  (and if such additional
         Events of Default  are to be for the benefit of less than all series of
         Securities,   stating  that  such  additional  Events  of  Default  are
         expressly being included solely for the benefit of such series); or

                  (d)  to add  to or  change  any  of  the  provisions  of  this
         Indenture to such extent as shall be necessary to permit or  facilitate
         the  issuance  of  Securities  in  bearer  form,   registrable  or  not
         registrable as to principal,  and with or without interest coupons,  or
         to permit or facilitate  the issuance of  Securities in  uncertificated
         form; or

                  (e) to add to,  change or eliminate  any of the  provisions of
         this Indenture in respect of one or more series of Securities, provided
         that any such  addition,  change or  elimination  (i) shall neither (A)
         apply to any Security of any series  created  prior to the execution of
         such  supplemental  indenture  and  entitled  to the  benefit  of  such
         provision  nor (B) modify the rights of the Holder of any such Security
         with respect to such provision or (ii) shall become effective only when
         there is no such Security Outstanding; or

                  (f) to establish the form or terms of Securities of any series
         as permitted by Sections 201 and 301; or

                  (g) to evidence and provide for the  acceptance of appointment
         hereunder by a successor  Trustee with respect to the Securities of one
         or more  series and to add to or change any of the  provisions  of this
         Indenture  as shall be  necessary  to  provide  for or  facilitate  the
         administration  of the  trusts  hereunder  by more  than  one  Trustee,
         pursuant to the requirements of Section 611; or

                  (h) to cure  any  ambiguity,  to  correct  or  supplement  any
         provision herein which may be defective or inconsistent  with any other
         provision  herein,  or to make any other  provisions  with  respect  to
         matters or questions  arising under this Indenture,  provided that such
         action  pursuant  to this  clause  (h) shall not  adversely  affect the
         interests  of the Holders of  Securities  of any series in any material
         respect.

                                      -51-
<PAGE>

         Section 902 Supplemental Indentures With Consent of Holders.

         With  the  consent  of the  Holders  of not  less  than a  majority  in
principal  amount of the Outstanding  Securities of each series affected by such
supplemental  indenture, by Act of said Holders delivered to the Company and the
Trustee, the Company, when authorized by a Board Resolution, and the Trustee may
enter into an indenture  or  indentures  supplemental  hereto for the purpose of
adding any  provisions  to or changing in any manner or  eliminating  any of the
provisions  of this  Indenture  or of  modifying in any manner the rights of the
Holders of Securities of such series under this  Indenture;  provided,  however,
that no such supplemental  indenture shall, without the consent of the Holder of
each Outstanding Security affected thereby,

                  (a) change the Stated  Maturity  of the  principal  of, or any
         installment of principal of or interest on, any Security, or reduce the
         principal amount thereof or the rate of interest thereon or any premium
         payable  upon the  redemption  thereof,  or  reduce  the  amount of the
         principal of an Original Issue Discount  Security or any other Security
         which would be due and payable upon a declaration  of  acceleration  of
         the  Maturity  thereof  pursuant to Section 502, or change any Place of
         Payment  where,  or the coin or currency in which,  any Security or any
         premium  or  interest  thereon  is  payable,  or  impair  the  right to
         institute suit for the  enforcement of any such payment on or after the
         Stated Maturity thereof (or, in the case of redemption, on or after the
         Redemption  Date),  or modify the  provisions  of this  Indenture  with
         respect to the  subordination of the Securities in a manner  materially
         adverse to the Holders, or

                  (b)  reduce  the   percentage  in  principal   amount  of  the
         Outstanding  Securities of any series,  the consent of whose Holders is
         required for any such supplemental  indenture,  or the consent of whose
         Holders  is  required  for  any  waiver  (of  compliance  with  certain
         provisions of this  Indenture or certain  defaults  hereunder and their
         consequences) provided for in this Indenture, or

                  (c) modify any of the provisions of this Section,  Section 513
         or Section 1009,  except to increase any such  percentage or to provide
         that certain other  provisions of this Indenture  cannot be modified or
         waived without the consent of the Holder of each  Outstanding  Security
         affected  thereby;  provided,  however,  that this clause  shall not be
         deemed to require the consent of any Holder with  respect to changes in
         the references to "the Trustee" and concomitant changes in this Section
         and Section 1009, or the deletion of this proviso,  in accordance  with
         the requirements of Section 611 and clause (h) of Section 901.

A  supplemental  indenture  which  changes or  eliminates  any covenant or other
provision of this  Indenture  which has expressly  been included  solely for the
benefit of one or more  particular  series of Securities,  or which modifies the
rights of the Holders of Securities of such series with respect to such covenant
or other  provision,  shall be  deemed  not to  affect  the  rights  under  this
Indenture of the Holders of Securities of any other series.

                                      -52-
<PAGE>

         It shall not be necessary  for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

         Section 903 Execution of Supplemental Indentures.

         In  executing,  or  accepting  the  additional  trusts  created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture,  the Trustee shall be entitled to receive,
and  (subject  to Section  601) shall be fully  protected  in relying  upon,  an
Opinion of Counsel stating that the execution of such supplemental  indenture is
authorized  or  permitted by this  Indenture.  The Trustee may, but shall not be
obligated  to,  enter into any such  supplemental  indenture  which  affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

         Section 904 Effect of Supplemental Indentures.

         Upon the execution of any  supplemental  indenture  under this Article,
this Indenture shall be modified in accordance therewith,  and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities  theretofore or thereafter  authenticated and delivered  hereunder
shall be bound thereby.

         Section 905 Conformity with Trust Indenture Act.

         Every  supplemental  indenture  executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act.

         Section 906 Reference in Securities to Supplemental Indentures.

         Securities  of  any  series   authenticated  and  delivered  after  the
execution of any supplemental  indenture pursuant to this Article may, and shall
if required by the Trustee,  bear a notation in form  approved by the Trustee as
to any matter provided for in such supplemental  indenture. If the Company shall
so determine,  new  Securities  of any series so modified as to conform,  in the
opinion of the Trustee and the Company,  to any such supplemental  indenture may
be prepared and executed by the Company and  authenticated  and delivered by the
Trustee in exchange for Outstanding Securities of such series.

                                  ARTICLE TEN

                                    Covenants

         Section 1001 Payment of Principal, Premium and Interest.

         The  Company  covenants  and agrees for the  benefit of each  series of
Securities that it will duly and punctually pay the principal of and any premium
and interest on the  Securities of that series in  accordance  with the terms of
the Securities and this Indenture.

                                      -53-
<PAGE>

         Section 1002 Maintenance of Office or Agency.

         The  Company  will  maintain in each Place of Payment for any series of
Securities an office or agency where  Securities of that series may be presented
or surrendered for payment,  where  Securities of that series may be surrendered
for  registration  of transfer or exchange  and where  notices and demands to or
upon the Company in respect of the  Securities of that series and this Indenture
may be served. The Company will give prompt written notice to the Trustee of the
location,  and any change in the location,  of such office or agency.  If at any
time the Company  shall fail to maintain any such  required  office or agency or
shall fail to furnish the Trustee with the address thereof,  such presentations,
surrenders,  notices and demands  may be made or served at the  Corporate  Trust
Office of the Trustee,  and the Company hereby appoints the Trustee as its agent
to receive all such presentations, surrenders, notices and demands.

         The  Company  may also from time to time  designate  one or more  other
offices or agencies  where the Securities of one or more series may be presented
or  surrendered  for any or all such  purposes and may from time to time rescind
such  designations;  provided,  however,  that no such designation or rescission
shall in any manner  relieve the Company of its obligation to maintain an office
or agency  in each  Place of  Payment  for  Securities  of any  series  for such
purposes. The Company will give prompt written notice to the Trustee of any such
designation  or  rescission  and of any change in the location of any such other
office or agency.

         Section 1003 Money for Securities Payments to Be Held in Trust.

         If the  Company  shall  at any time act as its own  Paying  Agent  with
respect to any series of Securities,  it will, on or before each due date of the
principal of or any premium or interest on any of the Securities of that series,
segregate  and hold in trust for the benefit of the Persons  entitled  thereto a
sum sufficient to pay the principal and any premium and interest so becoming due
until such sums shall be paid to such Persons or otherwise disposed of as herein
provided  and will  promptly  notify the  Trustee of its action or failure so to
act.

         Whenever  the  Company  shall  have one or more  Paying  Agents for any
series of Securities, it will, prior to each due date of the principal of or any
premium or interest on any  Securities  of that  series,  deposit  with a Paying
Agent a sum  sufficient  to pay such amount,  such sum to be held as provided by
the Trust  Indenture  Act,  and (unless  such Paying  Agent is the  Trustee) the
Company will promptly notify the Trustee of its action or failure so to act.

         The Company will cause each Paying  Agent for any series of  Securities
other than the Trustee to execute and  deliver to the Trustee an  instrument  in
which such Paying Agent shall agree with the Trustee,  subject to the provisions
of this Section,  that such Paying Agent will (1) comply with the  provisions of
the Trust  Indenture  Act  applicable to it as a Paying Agent and (2) during the
continuance  of any  default  by the  Company  (or any  other  obligor  upon the
Securities  of that  series)  in the  making of any  payment  in  respect of the
Securities of that series,  upon the written  request of the Trustee,  forthwith
pay to the Trustee  all sums held in trust by such  Paying  Agent for payment in
respect of the Securities of that series.

                                      -54-
<PAGE>

         The  Company  may at  any  time,  for  the  purpose  of  obtaining  the
satisfaction  and discharge of this Indenture or for any other purpose,  pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying  Agent,  such sums to be held by the Trustee
upon the same  trusts as those upon which such sums were held by the  Company or
such Paying  Agent;  and,  upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further  liability  with respect to
such money.

         Any money  deposited with the Trustee or any Paying Agent, or then held
by the Company,  in trust for the payment of the  principal of or any premium or
interest on any  Security of any series and  remaining  unclaimed  for two years
after such  principal,  premium or interest has become due and payable  shall be
paid to the Company on Company  Request,  or (if then held by the Company) shall
be discharged from such trust; and the Holder of such Security shall thereafter,
as an unsecured general creditor,  look only to the Company for payment thereof,
and all liability of the Trustee or such Paying Agent with respect to such trust
money,  and all  liability of the Company as trustee  thereof,  shall  thereupon
cease;  provided,  however,  that the Trustee or such Paying Agent, before being
required to make any such repayment,  may at the expense of the Company cause to
be published once, in a newspaper published in the English language, customarily
published   on   each   Business   Day   and   of   general    circulation    in
 .......................,  notice  that such money  remains  unclaimed  and that,
after a date  specified  therein,  which shall not be less than 30 days from the
date of such  publication,  any unclaimed  balance of such money then  remaining
will be repaid to the Company.

         Section 1004 Statement by Officers as to Default.

         The Company will deliver to the Trustee,  within 120 days after the end
of each fiscal year of the Company  ending after the date  hereof,  an Officers'
Certificate, stating whether or not to the best knowledge of the signers thereof
the Company is in default in the performance and observance of any of the terms,
provisions  and conditions of this  Indenture  (without  regard to any period of
grace or requirement of notice provided  hereunder) and, if the Company shall be
in default,  specifying  all such defaults and the nature and status  thereof of
which they may have knowledge.

         Section 1005 Existence.

         Subject to Article  Eight,  the Company will do or cause to be done all
things  necessary to preserve  and keep in full force and effect its  existence,
rights  (charter and  statutory) and  franchises;  provided,  however,  that the
Company  shall not be required to preserve  any such right or  franchise  if the
Board of Directors  shall determine that the  preservation  thereof is no longer
desirable  in the  conduct  of the  business  of the  Company  and that the loss
thereof is not disadvantageous in any material respect to the Holders.

                                      -55-
<PAGE>

         Section 1006 Maintenance of Properties.

         The Company will cause all properties  used or useful in the conduct of
its business or the business of any  Restricted  Subsidiary to be maintained and
kept in good condition, repair and working order and supplied with all necessary
equipment  and  will  cause  to  be  made  all  necessary   repairs,   renewals,
replacements,  betterments and improvements  thereof,  all as in the judgment of
the Company  may be  necessary  so that the  business  carried on in  connection
therewith may be properly and advantageously  conducted at all times;  provided,
however,  that  nothing  in  this  Section  shall  prevent  the  Company  or any
Restricted  Subsidiary from discontinuing the operation or maintenance of any of
such  properties  if such  discontinuance  is, in the judgment of the Company or
such  Restricted  Subsidiary,  desirable  in the conduct of its  business or the
business  of any  such  Restricted  Subsidiary  and not  disadvantageous  in any
material respect to the Holders.

         Section 1007 Payment of Taxes and Other Claims.

         The Company will pay or  discharge  or cause to be paid or  discharged,
before  the  same  shall  become  delinquent,  (a) all  taxes,  assessments  and
governmental  charges  levied or imposed upon the Company or any  Subsidiary  or
upon the income,  profits or  property  of the Company or any of its  Restricted
Subsidiaries, and (b) all lawful claims for labor, materials and supplies which,
if unpaid, might by law become a lien upon the property of the Company or any of
its  Restricted  Subsidiaries;  provided,  however,  that  the  Company  or such
Restricted  Subsidiary  shall not be required to pay or discharge or cause to be
paid or  discharged  any such tax,  assessment,  charge or claim  whose  amount,
applicability  or  validity  is being  contested  in good  faith by  appropriate
proceedings.

         Section 1008 Maintenance of Insurance.

         The Company shall, and shall cause its Restricted Subsidiaries to, keep
at all times all of their  properties  which are of an insurable  nature insured
against loss or damage with insurers  believed by the Company to be  responsible
to the  extent  that  property  of  similar  character  is usually so insured by
corporations  similarly  situated and owning like  properties in accordance with
good  business  practice.  The Company  shall,  and shall  cause its  Restricted
Subsidiaries  to, use the  proceeds  from any such  insurance  policy to repair,
replace or otherwise restore the property to which such proceeds relate.

         Section 1009 Waiver of Certain Covenants.

         Except as  otherwise  specified  as  contemplated  by  Section  301 for
Securities of such series,  the Company may,  with respect to the  Securities of
any series, omit in any particular  instance to comply with any term,  provision
or  condition  set forth in any  covenant  provided  pursuant  to clause  (r) of
Section  301 or clause (b) or (g) of Section  901 for the benefit of the Holders
of such series or in any of Sections 1005 to 1007, inclusive, if before the time
for such  compliance  the Holders of at least a majority in principal  amount of
the Outstanding Securities of such series shall, by Act of such Holders,  either
waive such compliance in such instance or

                                      -56-
<PAGE>

generally waive compliance with such term,  provision or condition,  but no such
waiver shall extend to or affect such term, provision or condition except to the
extent so expressly waived,  and, until such waiver shall become effective,  the
obligations  of the Company and the duties of the Trustee in respect of any such
term, provision or condition shall remain in full force and effect.

                                 ARTICLE ELEVEN

                            Redemption of Securities

         Section 1101 Applicability of Article.

         Securities  of any series  which are  redeemable  before  their  Stated
Maturity  shall be  redeemable  in  accordance  with their  terms and (except as
otherwise  specified  as  contemplated  by Section 301 for such  Securities)  in
accordance with this Article.

         Section 1102 Election to Redeem; Notice to Trustee.

         The election of the Company to redeem any Securities shall be evidenced
by a Board  Resolution or in another manner specified as contemplated by Section
301 for  such  Securities.  In case of any  redemption  at the  election  of the
Company  of less  than all the  Securities  of any  series  (including  any such
redemption  affecting only a single  Security),  the Company shall,  at least 60
days prior to the Redemption  Date fixed by the Company (unless a shorter notice
shall be  satisfactory  to the Trustee),  notify the Trustee of such  Redemption
Date, of the  principal  amount of Securities of such series to be redeemed and,
if applicable, of the tenor of the Securities to be redeemed. In the case of any
redemption of Securities  prior to the  expiration  of any  restriction  on such
redemption  provided  in the  terms  of such  Securities  or  elsewhere  in this
Indenture,  the Company shall furnish the Trustee with an Officers'  Certificate
evidencing compliance with such restriction.

         Section 1103 Selection by Trustee of Securities to Be Redeemed.

         If less  than  all the  Securities  of any  series  are to be  redeemed
(unless all the  Securities  of such  series and of a specified  tenor are to be
redeemed  or  unless  such  redemption  affects  only a  single  Security),  the
particular  Securities  to be redeemed  shall be selected  not more than 60 days
prior to the Redemption Date by the Trustee, from the Outstanding  Securities of
such series not previously called for redemption,  by such method as the Trustee
shall deem fair and  appropriate  and which may  provide for the  selection  for
redemption of a portion of the principal  amount of any Security of such series,
provided that the  unredeemed  portion of the  principal  amount of any Security
shall be in an authorized denomination (which shall not be less than the minimum
authorized  denomination) for such Security.  If less than all the Securities of
such series and of a specified tenor are to be redeemed  (unless such redemption
affects only a single Security),  the particular Securities to be redeemed shall
be selected not more than 60 days prior to the  Redemption  Date by the Trustee,
from  the  Outstanding  Securities  of  such  series  and  specified  tenor  not
previously called for redemption in accordance with the preceding sentence.

                                      -57-
<PAGE>

         The  Trustee  shall  promptly  notify  the  Company  in  writing of the
Securities  selected for  redemption as aforesaid and, in case of any Securities
selected for partial redemption as aforesaid, the principal amount thereof to be
redeemed.

         The  provisions  of the two preceding  paragraphs  shall not apply with
respect  to any  redemption  affecting  only a  single  Security,  whether  such
Security  is to be  redeemed  in  whole  or in  part.  In the  case of any  such
redemption  in part,  the  unredeemed  portion  of the  principal  amount of the
Security  shall be in an authorized  denomination  (which shall not be less than
the minimum authorized denomination) for such Security.

         For all  purposes  of this  Indenture,  unless  the  context  otherwise
requires,  all provisions relating to the redemption of Securities shall relate,
in the case of any  Securities  redeemed or to be redeemed  only in part, to the
portion of the principal  amount of such  Securities  which has been or is to be
redeemed.

         Section 1104 Notice of Redemption.

         Notice  of  redemption  shall  be given by  first-class  mail,  postage
prepaid,  mailed not less than 30 nor more than 60 days prior to the  Redemption
Date, to each Holder of Securities to be redeemed,  at his address  appearing in
the Security Register.

         All notices of redemption shall state:

                  (a) the Redemption Date,

                  (b) the Redemption Price,

                  (c) if less than all the Outstanding  Securities of any series
         consisting  of more  than a single  Security  are to be  redeemed,  the
         identification  (and,  in the case of  partial  redemption  of any such
         Securities,  the principal amounts) of the particular  Securities to be
         redeemed and, if less than all the Outstanding Securities of any series
         consisting  of a single  Security  are to be  redeemed,  the  principal
         amount of the particular Security to be redeemed,

                  (d) that on the  Redemption  Date the  Redemption  Price  will
         become due and payable upon each such  Security to be redeemed  and, if
         applicable,  that  interest  thereon  will cease to accrue on and after
         said date,

                  (e) that on the  Redemption  Date,  if such is the  case,  the
         right of the holders of each such  Security  to convert the  Securities
         shall terminate;

                  (f) the place or places  where  each  such  Security  is to be
         surrendered for payment of the Redemption Price, and

                  (g) that the  redemption is for a sinking fund, if such is the
         case.

                                      -58-
<PAGE>

         Notice of  redemption  of  Securities to be redeemed at the election of
the Company shall be given by the Company or, at the Company's  request,  by the
Trustee in the name and at the expense of the Company and shall be irrevocable.

         Section 1105 Deposit of Redemption Price.

         Prior to any  Redemption  Date,  the  Company  shall  deposit  with the
Trustee or with a Paying  Agent (or,  if the Company is acting as its own Paying
Agent,  segregate  and hold in trust as provided  in Section  1003) an amount of
money  sufficient to pay the Redemption  Price of, and (except if the Redemption
Date shall be an Interest  Payment Date) accrued interest on, all the Securities
which are to be redeemed on that date.

         Section 1106 Securities Payable on Redemption Date.

         Notice of redemption having been given as aforesaid,  the Securities so
to be redeemed  shall,  on the  Redemption  Date,  become due and payable at the
Redemption  Price  therein  specified,  and from and after such date (unless the
Company  shall  default  in the  payment  of the  Redemption  Price and  accrued
interest) such  Securities  shall cease to bear interest.  Upon surrender of any
such Security for redemption in accordance with said notice, such Security shall
be paid by the Company at the Redemption  Price,  together with accrued interest
to the Redemption Date; provided,  however,  that, unless otherwise specified as
contemplated  by Section 301,  installments of interest whose Stated Maturity is
on or prior to the  Redemption  Date  will be  payable  to the  Holders  of such
Securities,  or one or more  Predecessor  Securities,  registered as such at the
close of business on the relevant  Record Dates according to their terms and the
provisions of Section 307.

         If any  Security  called  for  redemption  shall  not be so  paid  upon
surrender  thereof for  redemption,  the principal and any premium shall,  until
paid, bear interest from the Redemption Date at the rate prescribed  therefor in
the Security.

         Section 1107 Securities Redeemed in Part.

         Any Security  which is to be redeemed only in part shall be surrendered
at a Place of Payment therefor (with, if the Company or the Trustee so requires,
due endorsement by, or a written  instrument of transfer in form satisfactory to
the Company and the Trustee duly executed by, the Holder thereof or his attorney
duly  authorized  in writing),  and the Company shall  execute,  and the Trustee
shall  authenticate  and deliver to the Holder of such Security  without service
charge,  a new Security or Securities  of the same series and of like tenor,  of
any authorized  denomination as requested by such Holder, in aggregate principal
amount equal to and in exchange for the  unredeemed  portion of the principal of
the Security so surrendered.

                                      -59-
<PAGE>

                                 ARTICLE TWELVE

                                  Sinking Funds

         Section 1201 Applicability of Article.

         The  provisions of this Article shall be applicable to any sinking fund
for the retirement of Securities of any series except as otherwise  specified as
contemplated by Section 301 for such Securities.

         The minimum  amount of any sinking  fund  payment  provided  for by the
terms of any  Securities  is herein  referred to as a  "mandatory  sinking  fund
payment",  and any payment in excess of such minimum amount  provided for by the
terms of such  Securities  is herein  referred to as an  "optional  sinking fund
payment". If provided for by the terms of any Securities, the cash amount of any
sinking fund  payment may be subject to  reduction as provided in Section  1202.
Each sinking fund payment  shall be applied to the  redemption  of Securities as
provided for by the terms of such Securities.

         Section 1202 Satisfaction of Sinking Fund Payments with Securities.

         The Company (1) may deliver  Outstanding  Securities of a series (other
than  any  previously  called  for  redemption)  and (2) may  apply  as a credit
Securities  of a series which have been  redeemed  either at the election of the
Company  pursuant to the terms of such  Securities or through the application of
permitted  optional  sinking  fund  payments  pursuant  to  the  terms  of  such
Securities,  in each case in satisfaction of all or any part of any sinking fund
payment  with  respect to any  Securities  of such  series  required  to be made
pursuant to the terms of such  Securities  as and to the extent  provided for by
the terms of such  Securities;  provided  that the  Securities to be so credited
have not been previously so credited.  The Securities to be so credited shall be
received and credited for such purpose by the Trustee at the  Redemption  Price,
as  specified  in the  Securities  so to be  redeemed,  for  redemption  through
operation of the sinking fund and the amount of such sinking fund payment  shall
be reduced accordingly.

         Section 1203 Redemption of Securities for Sinking Fund.

         Not less than 30 days prior to each  sinking  fund payment date for any
Securities,  the Company will  deliver to the Trustee an  Officers'  Certificate
specifying  the  amount  of the  next  ensuing  sinking  fund  payment  for such
Securities  pursuant to the terms of such Securities,  the portion  thereof,  if
any,  which is to be  satisfied by payment of cash and the portion  thereof,  if
any, which is to be satisfied by delivering and crediting Securities pursuant to
Section  1202 and will also  deliver  to the  Trustee  any  Securities  to be so
delivered.  Not less than 15 days prior to each such sinking fund payment  date,
the Trustee  shall select the  Securities  to be redeemed upon such sinking fund
payment  date in the manner  specified  in Section  1103 and cause notice of the
redemption  thereof to be given in the name of and at the expense of the Company
in the manner provided in Section 1104. Such notice having been duly given,  the
redemption  of such  Securities  shall be made upon the terms and in the  manner
stated in Sections 1106 and 1107.

                                      -60-
<PAGE>

                                ARTICLE THIRTEEN

                       Defeasance and Covenant Defeasance

         Section  1301  Company's  Option  to  Effect   Defeasance  or  Covenant
Defeasance.

         The Company may elect,  at its option at any time, to have Section 1302
or Section 1303 applied to any  Securities or any series of  Securities,  as the
case may be, designated  pursuant to Section 301 as being defeasible pursuant to
such  Section  1302 or 1303,  in  accordance  with any  applicable  requirements
provided  pursuant to Section 301 and upon  compliance  with the  conditions set
forth below in this  Article.  Any such  election  shall be evidenced by a Board
Resolution or in another  manner  specified as  contemplated  by Section 301 for
such Securities.

         Section 1302 Defeasance and Discharge.

         Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of  Securities,  as the case may be, the
Company shall be deemed to have been  discharged from its  obligations,  and the
provisions of Article Fourteen shall cease to be effective, with respect to such
Securities as provided in this Section on and after the date the  conditions set
forth in Section 1304 are satisfied (hereinafter called "Defeasance").  For this
purpose, such Defeasance means that the Company shall be deemed to have paid and
discharged the entire  indebtedness  represented by such  Securities and to have
satisfied all its other  obligations  under such  Securities  and this Indenture
insofar as such Securities are concerned (and the Trustee, at the expense of the
Company,  shall execute proper instruments  acknowledging the same),  subject to
the  following  which shall  survive  until  otherwise  terminated or discharged
hereunder:  (a) the rights of Holders of such Securities to receive, solely from
the trust fund  described  in  Section  1304 and as more fully set forth in such
Section, payments in respect of the principal of and any premium and interest on
such  Securities  when  payments are due,  (b) the  Company's  obligations  with
respect to such Securities  under Sections 304, 305, 306, 1002 and 1003, (c) the
rights,  powers,  trusts, duties and immunities of the Trustee hereunder and (d)
this Article.  Subject to compliance with this Article, the Company may exercise
its  option  (if  any)  to  have  this   Section   applied  to  any   Securities
notwithstanding  the prior  exercise of its option (if any) to have Section 1303
applied to such Securities.

         Section 1303 Covenant Defeasance.

         Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of  Securities,  as the case may be, (a)
the Company shall be released from its  obligations  under clause (c) of Section
801, Sections 1006 through 1008, inclusive,  and any covenants provided pursuant
to clause (r) of Section 301 or clause (b) or (g) of Section 901 for the benefit
of the Holders of such Securities, and (b) the occurrence of any event specified
in clause (d) of Section 501 (with  respect to any of clause (c) of Section 801,
Sections 1006 through 1008, inclusive,  and any such covenants provided pursuant
to clause (r) of Section 301 or clause (b) or (g) of Section 901 shall be deemed
not to be or result in an Event of Default,  and (c) the  provisions  of Article
Fourteen  shall  cease  to be  effective,  in each  case  with  respect  to such

                                      -61-
<PAGE>

Securities as provided in this Section on and after the date the  conditions set
forth in Section 1304 are satisfied (hereinafter called "Covenant  Defeasance").
For this purpose,  such  Covenant  Defeasance  means that,  with respect to such
Securities,  the Company may omit to comply with and shall have no  liability in
respect of any term,  condition or  limitation  set forth in any such  specified
Section (to the extent so specified in the case of clause (d) of Section 501) or
Article  Fourteen,  whether  directly or  indirectly  by reason of any reference
elsewhere herein to any such Section or Article or by reason of any reference in
any such  Section  or  Article  to any  other  provision  herein or in any other
document,  but the  remainder of this  Indenture  and such  Securities  shall be
unaffected thereby.

         Section 1304 Conditions to Defeasance or Covenant Defeasance.

         The following  shall be the  conditions to the  application  of Section
1302 or Section 1303 to any Securities or any series of Securities,  as the case
may be:

                  (a) The Company shall  irrevocably have deposited or caused to
         be deposited with the Trustee (or another  trustee which  satisfies the
         requirements  contemplated by Section 609 and agrees to comply with the
         provisions  of this Article  applicable  to it) as trust funds in trust
         for the purpose of making the following payments,  specifically pledged
         as security for, and  dedicated  solely to, the benefits of the Holders
         of such  Securities,  (i) money in an amount,  or (ii) U.S.  Government
         Obligations  which  through  the  scheduled  payment of  principal  and
         interest  in  respect  thereof  in  accordance  with  their  terms will
         provide,  not later than one day  before  the due date of any  payment,
         money  in an  amount,  or (iii) a  combination  thereof,  in each  case
         sufficient,   in  the  opinion  of  a  nationally  recognized  firm  of
         independent  public  accountants  expressed in a written  certification
         thereof delivered to the Trustee, to pay and discharge, and which shall
         be applied by the Trustee (or any such other qualifying trustee) to pay
         and  discharge,  the  principal of and any premium and interest on such
         Securities on the respective Stated Maturities,  in accordance with the
         terms of this  Indenture  and such  Securities.  As used herein,  "U.S.
         Government  Obligation"  means (x) any  security  which is (i) a direct
         obligation of the United States of America for the payment of which the
         full  faith and  credit of the  United  States of America is pledged or
         (ii) an obligation  of a Person  controlled or supervised by and acting
         as an agency or  instrumentality  of the United  States of America  the
         payment  of which is  unconditionally  guaranteed  as a full  faith and
         credit  obligation  by the United States of America,  which,  in either
         case (i) or (ii),  is not callable or  redeemable  at the option of the
         issuer  thereof,  and (y) any  depositary  receipt issued by a bank (as
         defined in Section  3(a)(2) of the  Securities  Act) as custodian  with
         respect to any U.S. Government  Obligation which is specified in Clause
         (x) above and held by such bank for the  account  of the holder of such
         depositary  receipt,  or  with  respect  to  any  specific  payment  of
         principal of or interest on any U.S. Government  Obligation which is so
         specified  and held,  provided  that  (except as  required by law) such
         custodian  is not  authorized  to make any  deduction  from the  amount
         payable  to the  holder  of such  depositary  receipt  from any  amount
         received by the custodian in respect of the U.S. Government  Obligation
         or the  specific  payment of  principal  or interest  evidenced by such
         depositary receipt.

                                      -62-
<PAGE>

                  (b) In the event of an election to have  Section 1302 apply to
         any  Securities  or any series of  Securities,  as the case may be, the
         Company  shall  have  delivered  to the  Trustee  an Opinion of Counsel
         stating  that (i) the  Company  has  received  from,  or there has been
         published by, the Internal  Revenue  Service a ruling or (ii) since the
         date of this  instrument,  there  has been a change  in the  applicable
         Federal  income tax law, in either case (i) or (ii) to the effect that,
         and based thereon such opinion shall confirm that,  the Holders of such
         Securities  will not  recognize  gain or loss for  Federal  income  tax
         purposes as a result of the  deposit,  Defeasance  and  discharge to be
         effected with respect to such Securities and will be subject to Federal
         income tax on the same amount, in the same manner and at the same times
         as would be the case if such deposit, Defeasance and discharge were not
         to occur.

                  (c) In the event of an election to have  Section 1303 apply to
         any  Securities  or any series of  Securities,  as the case may be, the
         Company  shall have  delivered  to the Trustee an Opinion of Counsel to
         the effect that the Holders of such  Securities will not recognize gain
         or loss for Federal  income tax purposes as a result of the deposit and
         Covenant  Defeasance to be effected with respect to such Securities and
         will be subject to Federal  income tax on the same amount,  in the same
         manner and at the same times as would be the case if such  deposit  and
         Covenant Defeasance were not to occur.

                  (d)  The  Company  shall  have  delivered  to the  Trustee  an
         Officer's  Certificate  to the effect that neither such  Securities nor
         any  other  Securities  of the  same  series,  if  then  listed  on any
         securities exchange, will be delisted as a result of such deposit.

                  (e) No event  which  is,  or after  notice or lapse of time or
         both would become,  an Event of Default with respect to such Securities
         or any other  Securities  shall have  occurred and be continuing at the
         time of such  deposit or, with  regard to any such event  specified  in
         clause (e) or (f) of Section  501,  at any time on or prior to the 90th
         day  after the date of such  deposit  (it  being  understood  that this
         condition shall not be deemed satisfied until after such 90th day).

                  (f) Such Defeasance or Covenant Defeasance shall not cause the
         Trustee to have a conflicting  interest within the meaning of the Trust
         Indenture  Act  (assuming  all  Securities  are in  default  within the
         meaning of such Act).

                  (g) Such Defeasance or Covenant Defeasance shall not result in
         a breach or  violation  of, or  constitute a default  under,  any other
         agreement or  instrument to which the Company is a party or by which it
         is bound.

                  (h) Such Defeasance or Covenant Defeasance shall not result in
         the trust arising from such deposit  constituting an investment company
         within the  meaning of the  Investment  Company  Act unless  such trust
         shall  be  registered  under  such  Act  or  exempt  from  registration
         thereunder.

                                      -63-
<PAGE>

                  (i) At the time of such deposit, (i) no default in the payment
         of any  principal  of or premium or  interest  on any Senior Debt shall
         have occurred and be continuing,  (ii) no event of default with respect
         to any Senior Debt shall have  resulted  in such Senior Debt  becoming,
         and  continuing  to be, due and  payable  prior to the date on which it
         would  otherwise  have become due and payable  (unless  payment of such
         Senior  Debt has been made or duly  provided  for),  and (iii) no other
         event of default  with  respect to any Senior Debt shall have  occurred
         and be  continuing  permitting  (after notice or lapse of time or both)
         the  holders  of such  Senior  Debt (or a  trustee  on  behalf  of such
         holders) to declare such Senior Debt due and payable  prior to the date
         on which it would otherwise have become due and payable.

                  (j)  The  Company  shall  have  delivered  to the  Trustee  an
         Officer's  Certificate and an Opinion of Counsel, each stating that all
         conditions  precedent  with  respect  to such  Defeasance  or  Covenant
         Defeasance have been complied with.

         Section 1305 Deposited Money and U.S. Government Obligations to Be Held
in Trust; Miscellaneous Provisions.

         Subject to the  provisions of the last  paragraph of Section 1003,  all
money and U.S. Government Obligations (including the proceeds thereof) deposited
with the  Trustee or other  qualifying  trustee  (solely  for  purposes  of this
Section and Section 1306, the Trustee and any such other trustee are referred to
collectively  as the  "Trustee")  pursuant  to  Section  1304 in  respect of any
Securities shall be held in trust and applied by the Trustee, in accordance with
the provisions of such  Securities and this  Indenture,  to the payment,  either
directly or through any such Paying Agent  (including  the Company acting as its
own  Paying  Agent)  as the  Trustee  may  determine,  to the  Holders  of  such
Securities,  of all sums due and to become due  thereon in respect of  principal
and any premium and interest,  but money so held in trust need not be segregated
from other funds except to the extent required by law. Money and U.S. Government
Obligations  so held in trust shall not be subject to the  provisions of Article
Fourteen.

         The Company shall pay and indemnify the Trustee against any tax, fee or
other  charge  imposed on or assessed  against the U.S.  Government  Obligations
deposited  pursuant to Section 1304 or the  principal  and interest  received in
respect thereof other than any such tax, fee or other charge which by law is for
the account of the Holders of Outstanding Securities.

         Anything in this Article to the contrary  notwithstanding,  the Trustee
shall  deliver or pay to the Company from time to time upon Company  Request any
money or U.S. Government Obligations held by it as provided in Section 1304 with
respect to any Securities which, in the opinion of a nationally  recognized firm
of independent public accountants  expressed in a written  certification thereof
delivered to the Trustee,  are in excess of the amount  thereof which would then
be required to be deposited to effect the Defeasance or Covenant Defeasance,  as
the case may be, with respect to such Securities.

                                      -64-
<PAGE>

         Section 1306 Reinstatement.

         If the  Trustee  or the  Paying  Agent is  unable to apply any money in
accordance  with this Article with  respect to any  Securities  by reason of any
order or judgment of any court or governmental authority enjoining,  restraining
or otherwise  prohibiting  such  application,  then the  obligations  under this
Indenture  and such  Securities  from which the Company has been  discharged  or
released  pursuant to Section  1302 or 1303 shall be revived and  reinstated  as
though no deposit had  occurred  pursuant to this  Article  with respect to such
Securities, until such time as the Trustee or Paying Agent is permitted to apply
all money held in trust pursuant to Section 1305 with respect to such Securities
in accordance with this Article;  provided,  however,  that if the Company makes
any payment of  principal  of or any  premium or  interest on any such  Security
following such reinstatement of its obligations, the Company shall be subrogated
to the rights (if any) of the Holders of such Securities to receive such payment
from the money so held in trust.

         This instrument may be executed in any number of counterparts,  each of
which so executed shall be deemed to be an original,  but all such  counterparts
shall  together  constitute  but one and the same  instrument.  In  proving  the
existence  of this  Indenture it shall not be necessary to produce more than one
copy.

         In Witness Whereof, the parties hereto have caused this Indenture to be
duly executed,  and their respective  corporate seals to be hereunto affixed and
attested, all as of the day and year first above written.

                                         American Tower Corporation


                                         By..............................

Attest:

 ...................


         ..........................

         By........................

Attest:

 ...................

                                      -65-
<PAGE>



STATE OF NEW YORK          )
                           )  ss.:
COUNTY OF NEW YORK                 )


         On the  ....  day of  ...........,  ....,  before  me  personally  came
 ...........................,  to me  known,  who,  being by me duly  sworn,  did
depose      and     say     that     he     is      ....................      of
 .................................,  one of  the  corporations  described  in and
which  executed  the  foregoing  instrument;  that  he  knows  the  seal of said
corporation;  that the seal affixed to said  instrument is such corporate  seal;
that  it was so  affixed  by  authority  of  the  Board  of  Directors  of  said
corporation; and that he signed his name thereto by like authority.

                                                        .....................


STATE OF NEW YORK          )
                           )  ss.:
COUNTY OF NEW YORK                 )


         On the  ....  day of  ...........,  ....,  before  me  personally  came
 ...........................,  to me  known,  who,  being by me duly  sworn,  did
depose      and     say     that     he     is      ....................      of
 .................................,  one of  the  corporations  described  in and
which  executed  the  foregoing  instrument;  that  he  knows  the  seal of said
corporation;  that the seal affixed to said  instrument is such corporate  seal;
that  it was so  affixed  by  authority  of  the  Board  of  Directors  of  said
corporation; and that he signed his name thereto by like authority.

                                                         ....................


                                      -66-

                                                                       EXHIBIT 5


                              SULLIVAN & WORCESTER LLP
                               ONE POST OFFICE SQUARE
                             BOSTON, MASSACHUSETTS 02109
                                   (617) 338-2800
                                FAX NO. 617-338-2880
     IN WASHINGTON, D.C.                                   IN NEW YORK CITY
1025 CONNECTICUT AVENUE, N.W.                              767 THIRD AVENUE
   WASHINGTON, D.C. 20036                              NEW YORK, NEW YORK 10017
       (202) 775-8190                                       (212) 486-8200
    FAX NO. 202-293-2275                                 FAX NO. 212-758-2151




                                                        May 26, 2000


American Tower Corporation
116 Huntington Avenue
Boston, Massachusetts 02116

         Re: American Tower Corporation Registration Statement on Form S-3

Ladies and Gentlemen:

         In connection with the  registration by American Tower  Corporation,  a
Delaware  corporation  (the  "Company"),  of up to  $1,000,000,000  in aggregate
amount of one or more series of (i) debt  securities  of the Company  (the "Debt
Securities"),  (ii) shares of preferred stock,  $.01 par value per share, of the
Company  (the  "Preferred   Shares"),   (iii)  depositary  shares   representing
fractional  interests in Preferred  Shares  ("Depositary  Shares")  evidenced by
depositary  receipts therefor  ("Depositary  Receipts"),  (iv) shares of Class A
common stock, $.01 par value per share, of the Company (the "Common Shares"), or
(v) warrants to purchase Debt Securities, Preferred Shares, Depositary Shares or
Common Shares (the "Warrants" and, together with the Debt Securities,  Preferred
Shares, Depositary Shares, and Common Shares, the "Registered Securities"),  for
offering by the Company from time to time, as set forth in the final  prospectus
that  forms  a  part  of the  Registration  Statement,  as  defined  below  (the
"Prospectus"),  and as to be set forth in one or more final  supplements  to the
Prospectus (each, a "Prospectus Supplement"), the following opinion is furnished
to the Company to be filed with the  Securities  and  Exchange  Commission  (the
"Commission") as Exhibit 5 to the Company's  Registration Statement on Form S-3,
under the Securities Act of 1933, as amended (the "Securities Act"), to be filed
on or about the date hereof.  As used in this  opinion,  the term  "Registration
Statement" means,  unless otherwise  stated,  such  Registration  Statement,  as
amended when  declared  effective by the  Commission  (including  any  necessary
post-effective amendments thereto); the term "Convertible Registered Securities"
means  Registered  Securities  which are convertible  into,  exchangeable for or
exercisable for other Registered Securities, and the term "Underlying Registered
Securities" means any Registered  Securities which are issuable upon conversion,
exchange or exercise of Convertible Registered Securities.

         In  connection  with this  opinion,  we have examined and relied upon a
copy of the  Registration  Statement to be filed with the Commission on or about
the date hereof.  We have also  examined and relied upon  originals or copies of
such records, agreements and instruments of the Company,  certificates of public
officials  and of officers of the Company and such other

<PAGE>

American Tower Corporation
May 26, 2000
Page 2

documents and records, and such matters of law, as we have deemed necessary as a
basis for the opinions  hereinafter  expressed.  In making such examination,  we
have assumed the  genuineness of all  signatures,  the legal capacity of natural
persons,  the authenticity of all documents submitted to us as originals and the
conformity to the originals of all  documents  submitted to us as copies,  which
facts we have not independently verified.

         We have necessarily  assumed in connection with the opinions  expressed
below that the terms and conditions of the Registered Securities and any related
indentures,  agreements and  instruments,  except to the extent described in the
Registration Statement and the form of preliminary prospectus contained therein,
as originally  filed,  will be, and that any related  proceedings of the Company
conducted  after the date hereof will be conducted,  (i) in accordance  with all
applicable  laws  and  the  Company's   Amended  and  Restated   Certificate  of
Incorporation (the "Restated Certificate") and By-Laws, as amended, and (ii) not
in conflict with any contractual or other  restrictions which are binding on the
Company,  and that,  without  limiting  the  generality  of the  foregoing,  any
agreements or instruments that are hereafter  required to be filed as an exhibit
to the Registration  Statement will be properly filed by an amendment thereto or
by the filing of a Form 8-K by the Company under the Securities  Exchange Act of
1934, as amended,  and properly  incorporated  by reference in the  Registration
Statement,  as permitted by the Securities Act and the rules and  regulations of
the Commission  thereunder.  We have also necessarily assumed in connection with
such  opinions  with  respect to any Common  Shares or  Preferred  Shares or any
Convertible  Registered Securities as to which Common Shares or Preferred Shares
are the  related  Underlying  Registered  Securities  that,  at the  time of the
issuance  thereof,  the  Company  will  have a  sufficient  number  of shares of
authorized  Common  Shares or  Preferred  Shares,  as the case may be, under the
Restated  Certificate  that will be  unissued  and not  otherwise  reserved  for
issuance.

         To the extent that the  obligations of the Company under each Indenture
or any Warrant Agreement or Depositary  Agreement (each as defined below) may be
dependent  upon such matters,  we have assumed for purposes of this opinion that
each Trustee,  Warrant  Agent and  Depositary  (each as defined  below) are duly
organized,  validly  existing  and in good  standing  under  the  laws of  their
respective  jurisdictions of  organization,  and are duly qualified to engage in
the activities contemplated by, and have the requisite  organizational and legal
power  and  authority  to  perform  their  respective  obligations  under,  each
Indenture, Warrant Agreement and Depositary Agreement to which they are parties,
that each Trustee, Warrant Agent and Depositary will be in compliance, generally
with  respect to acting as a trustee or agent under each  applicable  Indenture,
Warrant  Agreement  and  Depositary  Agreement,  with  all  applicable  laws and
regulations,  and that each  Indenture and any Warrant  Agreement and Depositary
Agreement will be the valid and binding  agreements of each party thereto (other
than, in the case of an indenture in the form filed as Exhibit 4.1 or 4.2 to the
Registration Statement when appropriately completed,  the Company),  enforceable
against such parties in accordance with their respective terms.

         We express no opinion herein as to the laws of any  jurisdiction  other
than  the  laws of The  Commonwealth  of  Massachusetts,  the  Delaware  General
Corporation  Law and the federal  laws

<PAGE>

American Tower Corporation
May 26, 2000
Page 3

of the  United  States  of  America,  and we  express  no  opinion  as to  state
securities or blue sky laws.

         The  opinions  set  forth  below  are  also  subject  to the  following
additional qualifications:

         (a) The  obligations,  rights and remedies of parties may be limited by
(i) bankruptcy, insolvency, reorganization, fraudulent conveyance, moratorium or
other  similar  laws  affecting  the  enforcement  generally  of the  rights and
remedies of creditors or the obligations of debtors,  (ii) general principles of
equity  (regardless of whether  considered in a proceeding at law or in equity),
including,  without  limitation,  the  discretion  of  any  court  of  competent
jurisdiction in granting  specific  performance or injunctive or other equitable
relief,  and (iii) an implied  duty on the part of the party  seeking to enforce
rights or remedies to take action and make  determinations on a reasonable basis
and in good faith to the extent required by applicable law.

         (b) We  express  no opinion  as to the  enforceability  of  prospective
waivers  of  rights  to  notice  or  a  hearing,  or  other  rights  granted  by
constitution or statute,  powers of attorney,  provisions  purporting to relieve
parties  of the  consequences  of  their  own or  their  agent's  negligence  or
misconduct,  provisions  granting indemnity or rights of contribution (which may
be limited or prohibited by federal or state  securities laws or public policy),
or provisions purporting to establish evidentiary standards.

         (c) The enforceability of any security,  obligation or agreement may be
limited  by  general   principles   of  contract  law  which   include  (i)  the
unenforceability of provisions to the effect that provisions therein may only be
amended or waived in writing to the extent that an oral agreement modifying such
provisions  has been  entered  into or a course of conduct  between  the parties
indicates  otherwise,  (ii) the  general  rule  that,  where less than all of an
agreement is enforceable, the balance is enforceable only when the unenforceable
portion is not an essential part of the agreed  exchange,  (iii) the exercise of
judicial  discretion  regarding the  determination of damages and entitlement to
attorneys'  fees and other  costs,  and (iv) the  possible  right of the a party
which  has  materially  failed  to render  or offer  performance  required  by a
contract  to cure that  failure,  unless  permitting  a cure would  unreasonably
hinder the aggrieved party from making  substitute  arrangements for performance
or it was important in the  circumstance to the aggrieved party that performance
occur by the date stated in such contract.

         (d) We express no opinion as to (i) whether a state or a federal  court
would give effect to the choice of law provided for in any security,  obligation
or  agreement,  (ii) the  provisions  of any  agreement  which purport to confer
subject matter  jurisdiction on any court, to consent to the jurisdiction of any
court or to waive venue or inconvenient  forum with respect to any court,  (iii)
any provisions of any security, obligation or agreement which purport to provide
for a method of service of process which is inconsistent  with applicable law or
rules of the relevant court, (iv) any provision which purports to bind any party
to agree to conclude an agreement at a future date,  or (v) any  provisions  for
the payment of any amount (other than stated interest rates or dividends) to the
extent that a court may find that such payment constitutes a penalty.

         Based on and subject to the  foregoing,  we are of the opinion that, as
of the date hereof:


<PAGE>

American Tower Corporation
May 26, 2000
Page 4

         1. Each series of Debt  Securities  will be validly  issued and binding
obligations of the Company when (i) the Registration Statement shall have become
effective under the Securities Act and the indentures  filed as Exhibits 4.1 and
4.2  to  the  Registration  Statement,   including  any  necessary  supplemental
indenture,  or  any  other  indenture,   including  any  necessary  supplemental
indenture  thereto,  filed as an exhibit to the Registration  Statement,  as the
case  may be (the  applicable  indenture,  as so  filed  and  supplemented,  the
"Indenture"),  shall have been qualified  under the Trust Indenture Act of 1939,
as amended,  and the  Indenture  shall have been duly  authorized,  executed and
delivered by the Company and a trustee named thereunder (the "Trustee"),  (ii) a
Prospectus Supplement with respect to such Debt Securities shall have been filed
with the  Commission  pursuant to Rule 424 under the  Securities  Act, (iii) the
Company's Board of Directors or a duly authorized  committee  thereof shall have
duly adopted final  resolutions (the "Final Debt  Resolutions")  authorizing the
issuance and sale of such Debt Securities as  contemplated  by the  Registration
Statement,  the  Prospectus,   the  applicable  Prospectus  Supplement  and  the
Indenture, (iv) such series of Debt Securities shall have been (A) duly executed
by the Company and authenticated by the Trustee as provided in the Indenture and
the Final Debt  Resolutions  and (B) duly  delivered to the  purchasers  thereof
against  payment  of the  agreed  consideration  therefor,  as  provided  in the
Registration  Statement,  the Prospectus,  the applicable Prospectus Supplement,
the  Indenture  and the Final  Debt  Resolutions.  If such Debt  Securities  are
Underlying  Registered  Securities,  the opinion set forth in this  paragraph is
subject to the further  condition  that the  Convertible  Registered  Securities
relating to such Debt Securities, at the time of the issuance thereof and of the
conversion,  exchange or exercise  thereof,  are validly issued,  fully paid and
non-assessable  by the Company or are validly issued and binding  obligations of
the Company, as applicable.

         2. Each series of Preferred  Shares will be validly issued,  fully paid
and non-assessable by the Company when (i) the Registration Statement shall have
become  effective  under the Securities  Act, (ii) a Prospectus  Supplement with
respect to such  Preferred  Shares  shall  have been  filed with the  Commission
pursuant to Rule 424 under the  Securities  Act,  (iii) the  Company's  Board of
Directors or a duly authorized  committee  thereof shall have duly adopted final
resolutions (the "Final Preferred Shares Resolutions")  authorizing the issuance
and sale of such Preferred Shares as contemplated by the Registration Statement,
the Prospectus and the applicable Prospectus  Supplement,  (iv) a Certificate of
Designation  setting  forth  the  terms  of such  series  of  Preferred  Shares,
including  establishing  a  sufficient  quantity  thereof and setting  forth the
preferences, restrictions, limitations as to dividends, qualifications and terms
and  conditions  of  redemption,  consistent  with the  Final  Preferred  Shares
Resolutions,  shall  have been duly  executed  and filed with and  accepted  for
record  by the  Secretary  of the  State  of the  State  of  Delaware,  and  (v)
certificates  evidencing  such  Preferred  Shares shall have been duly executed,
countersigned  and  registered  and duly  delivered  to the  purchasers  thereof
against payment of the agreed consideration therefor (and in any event an amount
at  least  equal  to the  par  value,  if  any,  thereof),  as  provided  in the
Registration Statement, the Prospectus, the applicable Prospectus Supplement and
the Final Preferred Shares Resolutions.  If such Preferred Shares are Underlying
Registered  Securities,  the opinions set forth in this  paragraph is subject to
the further  condition that the Convertible  Registered  Securities  relating to
such  Preferred  Shares,  at  the  time  of  the  issuance  thereof  and  of the
conversion,  exchange or exercise  thereof,  are validly issued,  fully

<PAGE>

American Tower Corporation
May 26, 2000
Page 5

paid and  non-assessable  by the  Company  or are  validly  issued  and  binding
obligations of the Company, as applicable.

         3.  The  Depositary  Shares  will be  validly  issued,  fully  paid and
non-assessable by the Company and the Depositary Receipts will be validly issued
and will entitle the holders thereof to the rights specified  therein and in the
applicable Depositary Agreement,  when (i) the conditions set forth in paragraph
2 above with respect to the related Preferred Shares are met, (ii) the Company's
Board of  Directors  or a duly  authorized  committee  thereof  shall  have duly
adopted final resolutions (the "Final Depositary Shares Resolutions")  approving
one or more depositary  agreements,  including a form of Depositary  Receipt set
forth therein or related thereto (each, a "Depositary  Agreement"),  relating to
such  Depositary  Shares,  between  the  Company  and  a  financial  institution
identified  therein as depositary  (each, a "Depositary"),  (iii) the applicable
Depositary  Agreement shall have been duly executed and delivered by the Company
and the  Depositary,  (iv) the  related  Preferred  Shares  shall have been duly
deposited  with  the  Depositary  under  the  Depositary  Agreement  and (v) the
applicable  Depositary  Receipts shall have been duly executed by the Depositary
as provided in the  applicable  Depositary  Agreement  and the Final  Depositary
Shares  Resolutions  and  registered  and  shall  have  been  delivered  to  the
purchasers  thereof against  payment of the agreed  consideration  therefor,  as
provided  in  the  Registration  Statement,   the  Prospectus,   the  applicable
Prospectus  Supplement,  the  applicable  Depositary  Agreement  and  the  Final
Depositary Shares Resolutions.

         4.  The  Common  Shares  will  be  validly   issued,   fully  paid  and
non-assessable  by the Company when (i) the  Registration  Statement  shall have
become  effective  under the Securities  Act, (ii) a Prospectus  Supplement with
respect to such Common Shares shall have been filed with the Commission pursuant
to Rule 424 under the Securities  Act, (iii) the Company's Board of Directors or
a duly authorized  committee  thereof shall have duly adopted final  resolutions
(the "Final Common  Shares  Resolutions")  authorizing  the issuance and sale of
such Common Shares as contemplated by the Registration Statement, the Prospectus
and the applicable Prospectus Supplement,  and (iv) certificates evidencing such
Common Shares shall have been duly  executed,  countersigned  and registered and
duly  delivered  to  the  purchasers  thereof  against  payment  of  the  agreed
consideration  therefor  (and in any event an  amount at least  equal to the par
value thereof), as provided in the Registration Statement,  the Prospectus,  the
applicable  Prospectus  Supplement and the Final Common Shares  Resolutions.  If
such Common Shares are Underlying Registered  Securities,  the opinion set forth
in this  paragraph  is subject to the  further  condition  that the  Convertible
Registered  Securities  relating  to  such  Common  Shares,  at the  time of the
issuance  thereof  and of the  conversion,  exchange or  exercise  thereof,  are
validly  issued,  fully paid and  non-assessable  by the  Company or are validly
issued and binding obligations of the Company, as applicable.

         5. The Warrants will be duly  authorized and validly issued and binding
obligations of the Company when (i) the Registration Statement shall have become
effective under the Securities Act, (ii) a Prospectus Supplement with respect to
such  Warrants  shall have been filed with the  Commission  pursuant to Rule 424
under the  Securities  Act,  (iii) the  Company's  Board of  Directors or a duly
authorized  committee  thereof  shall have duly adopted final  resolutions  (the
"Final Warrant Resolutions")  authorizing the issuance and sale of such Warrants
as contemplated

<PAGE>

American Tower Corporation
May 26, 2000
Page 6

by the  Registration  Statement,  the Prospectus  and the applicable  Prospectus
Supplement  and  approving one or more warrant  agreements,  including a form of
warrant set forth  therein or related  thereto  (each,  a "Warrant  Agreement"),
establishing the terms and conditions of such Warrants,  between the Company and
a financial  institution  identified  therein as warrant agent (each, a "Warrant
Agent"), (iv) the applicable Warrant Agreement shall have been duly executed and
delivered by the Company and the Warrant Agent, and (v) such Warrants shall have
been duly  executed  by the Company and  authenticated  by the Warrant  Agent as
provided in the applicable  Warrant Agreement and the Final Warrant  Resolutions
and  registered  and shall have been duly  delivered to the  purchasers  thereof
against  payment  of the  agreed  consideration  therefor,  as  provided  in the
Registration  Statement,  the Prospectus,  the applicable Prospectus Supplement,
the  applicable  Warrant  Agreement and the Final Warrant  Resolutions.  If such
Warrants are  Underlying  Registered  Securities,  the opinion set forth in this
paragraph is subject to the further  condition that the  Convertible  Registered
Securities relating to such Warrants, at the time of the issuance thereof and of
the conversion, exchange or exercise thereof, are validly issued, fully paid and
non-assessable  by the Company or are validly issued and binding  obligations of
the Company, as applicable.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement  and to the  reference  to our  firm  in the  Prospectus
forming a part of the Registration  Statement. In giving such consent, we do not
thereby  admit that we come  within the  category  of persons  whose  consent is
required  under Section 7 of the Act or under the rules and  regulations  of the
Commission promulgated thereunder.

                                             Very truly yours,


                                             /s/ SULLIVAN & WORCESTER LLP
                                             SULLIVAN & WORCESTER LLP



<TABLE>
<CAPTION>

                                                                                                         Exhibit 12

                                           Ratio of Earnings to Fixed Charges
                                               American Tower Corporation

The following  table reflects the  computation of the ratio of earnings to fixed
charges for the periods presented.


                         Period from July 17, 1995                                                          Three Months
Computation of                (Incorporation)                                                                  Ended
Earnings:                   to December 31, 1995                         Year ended December 31,             March 31,
                         --------------------------
                                                                1996        1997        1998        1999       2000
                                                                ----        ----        ----        ----       ----
<S>                             <C>                         <C>         <C>         <C>         <C>         <C>
Loss Before Income
  Taxes and
  Extraordinary Losses           $   (184)                   $   (434)   $ (2,049)   $(42,441)   $(49,141)   $(51,100)

Add:
Interest Expense .....                 --                          --       3,040      23,229      27,492      32,310
Operating Leases .....                  2                         126         633       3,245       6,963       2,957
                                 --------                    --------    --------    --------    --------    --------

Earnings as Adjusted .               (182)                       (308)      1,624     (15,967)    (14,686)    (15,833)

Computation of Fixed
Charges:
Interest Expense .....                 --                          --       3,040      23,229      27,492      32,310
Interest Capitalized .                 --                          --         458       1,403       3,379       2,495
Operating Leases .....                  2                         126         633       3,245       6,963       2,957
                                 --------                    --------    --------    --------    --------    --------

Fixed Charges ........                  2                         126       4,131      27,877      37,834      37,762

Ratio of Earnings to
  Fixed Charges ......                 --                          --         .39          --          --          --

Deficiency in Earnings
  Required to Cover
  Fixed Charges ......           $    184                    $    434    $  2,507    $ 43,844    $ 52,520    $ 53,595

<FN>

(1)  Interest expense includes  amortization of deferred  financing costs for the years ended December 31, 1997, 1998 and
     1999 and the three months ended March 31, 2000. Interest expense also includes redeemable  preferred stock dividends
     in the aggregate amount of $3.1 million for the year ended December 31, 1998.

(2)  For purposes of this calculation, "earnings" consist of loss before income taxes and extraordinary losses and fixed
     charges  (excluding  interest  capitalized).   "Fixed  charges"  consist  of  interest  expensed  and  capitalized,
     amortization  or debt discount and related  issuance  costs and the  component of rental  expense  associated  with
     operating leases believed by management to be representative of the interest factor thereon (30%).
</FN>
</TABLE>

                                                                 Exhibit 23.2

                          INDEPENDENT AUDITORS' CONSENT

     We consent to the incorporation by reference in this Registration Statement
of American  Tower  Corporation  on Form S-3 of our report  dated March 1, 2000,
appearing in the Annual Report on Form 10-K of American  Tower  Corporation  for
the year ended  December 31, 1999,  and to the reference to us under the heading
"Experts" in the Prospectus, which is part of this Registration Statement.




/S/ DELOITTE & TOUCHE LLP
Boston, Massachusetts
May 26, 2000




                                                                  Exhibit 23.3

                              Accountants' Consent

The Board of Directors
UNIsite, Inc. and Subsidiaries:

     We consent to the incorporation by reference in the registration  statement
on Form S-3 of American Tower  Corporation of our report dated January 14, 2000,
with  respect  to  the  consolidated   balance  sheets  of  UNIsite,   Inc.  and
Subsidiaries  as of  December  31, 1999 and 1998,  and the related  consolidated
statements  of   operations,   redeemable   convertible   preferred   stock  and
stockholders'  deficit,  and cash flows for each of the years in the  three-year
period ended  December 31, 1999 which report appears in the Form 8-K of American
Tower  Corporation  dated March 30, 2000, and to the reference to our firm under
the heading "Experts" in the prospectus.

                                              /s/ KPMG LLP

Tampa, Florida
May 26, 2000


                                                                    Exhibit 23.4

                       CONSENT OF INDEPENDENT ACCOUNTANTS

The Board of Directors
ICG Satellite Services, Inc.

     We consent to the incorporation by reference in the registration  statement
on Form S-3 of American Tower Corporation of our report dated February 28, 2000,
with respect to the consolidated  balance sheet of ICG Satellite Services,  Inc.
and subsidiary as of November 30, 1999, and the related consolidated  statements
of operations and accumulated deficit and cash flows for the eleven month period
ended November 30, 1999,  which report appears in the Form 8-K of American Tower
Corporation  dated March 30,  2000,  and to the  reference to our firm under the
heading "Experts" in the prospectus.

                                                  /s/ KPMG LLP
Denver, Colorado
May 25, 2000



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