CONFORMED COPY

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                               THE AES CORPORATION

                                       AND

                       THE FIRST NATIONAL BANK OF CHICAGO

                                   as Trustee

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


                          FIRST SUPPLEMENTAL INDENTURE

                           Dated as of March 31, 1997

                                       TO

                          JUNIOR SUBORDINATED INDENTURE

                            Dated as of March 1, 1997

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


                5.375% Junior Subordinated Convertible Debentures

                                    Due 2027

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     The  First  Supplemental  INDENTURE,  dated as of the  thirty  first day of
March, 1997 (the "First Supplemental Indenture"), between THE AES CORPORATION, a
corporation  duly organized and existing under the laws of the State of Delaware
(hereinafter sometimes referred to as the "Company") and The First National Bank
of Chicago, a national banking association,  as trustee  (hereinafter  sometimes
referred to as the "Trustee") under the Junior  Subordinated  Indenture dated as
of March 1, 1997 between the Company and the Trustee (the  "Indenture")  (except
as otherwise set forth herein, all terms used and not defined herein are used as
defined in the Indenture or in the Declaration of Trust);

     WHEREAS, the Company executed and delivered the Indenture to the Trustee to
provide  for the future  issuance  of its junior  subordinated  securities  (the
"Debentures"), said Debentures to be issued from time to time in series as might
be  determined  by the Company under the  Indenture,  in an unlimited  aggregate
principal amount which may be authenticated  and delivered  thereunder as in the
Indenture provided; and

     WHEREAS,  pursuant to the terms of the  Indenture,  the Company  desires to
provide for the  establishment  of a new series of its Debentures to be known as
its 5.375%  Junior  Subordinated  Convertible  Debentures  due 2027 (said series
being hereinafter referred to as the "Series 5.375%  Debentures"),  the form and
substance  of such  Series  5.375%  Debentures  and the  terms,  provisions  and
conditions  thereof to be set forth as provided in the  Indenture and this First
Supplemental Indenture; and

     WHEREAS,  the Company has caused to be formed AES Trust I ("AES Trust I" or
the "Trust") as a statutory  business  trust under the Business Trust Act of the
State of Delaware (12 Del. Code ss. 3801 et seq.)  pursuant to a declaration  of
trust dated  November 1, 1996 (the "Original  Declaration")  and the filing of a
restated  certificate  of trust  with  the  Secretary  of State of the  State of
Delaware on March 27, 1997; and

     WHEREAS,  the  Original  Declaration  is to be amended and  restated in its
entirety  pursuant to an Amended and Restated  Declaration  of Trust dated as of
March 31, 1997 (such Amended and Restated  Declaration of Trust, as amended from
time to time, the "Declaration of Trust"); and

     WHEREAS,  AES  Trust I  desires  to  issue  its  $2.6875  Term  Convertible
Securities,  Series A (the  "Preferred  Securities"  or "TECONS")  and sell such
Preferred Securities to initial purchasers; and

     WHEREAS, in connection with such purchases of Preferred  Securities and the
related  purchase  by the  Company of the Common  Securities  (as defined in the
Declaration  of Trust) of AES Trust I, AES Trust I will purchase as trust assets
Series 5.375% Debentures; and

     WHEREAS,  pursuant  to the  Declaration  of Trust,  the legal  title to the
Series  5.375%  Debentures  shall be owned and held of record in the name of The
First National

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Bank of Chicago or its successor  under the  Declaration  of Trust,  as Property
Trustee  (the  "Property  Trustee"),  in trust for the benefit of holders of the
Preferred Securities and the Common Securities; and

     WHEREAS,  upon  the  occurrence  of a  Special  Event  (as  defined  in the
Declaration  of Trust) the Regular  Trustees (as defined in the  Declaration  of
Trust) of AES Trust I shall, unless the Series 5.375% Debentures are redeemed as
described  herein,  dissolve  AES  Trust I and  cause to be  distributed  to the
holders  of  Preferred  Securities  and Common  Securities,  on a Pro Rata basis
(determined  as provided  in the terms of the  Preferred  Securities  and Common
Securities  attached as Exhibits B and C to the  Declaration  of Trust),  Series
5.375% Debentures and, in connection with a Liquidation Distribution (as defined
in the Declaration of Trust),  the Regular  Trustees may cause to be distributed
to holders of Preferred  Securities  and Common  Securities,  on such a Pro Rata
basis, Series 5.375% Debentures (each a "Dissolution Event"); and

     WHEREAS,  the Company desires and has requested the Trustee to join with it
in the  execution  and delivery of this First  Supplemental  Indenture,  and all
requirements  necessary  to  make  this  First  Supplemental  Indenture  a valid
instrument,  in  accordance  with  its  terms,  and to make  the  Series  5.375%
Debentures when executed by the Company and  authenticated  and delivered by the
Trustee,  the  valid  obligations  of  the  Company,  have  been  performed  and
fulfilled,  and the execution and delivery hereof have been in all respects duly
authorized;

     NOW  THEREFORE,  in  consideration  of the purchase and  acceptance  of the
Series 5.375% Debentures by the holders thereof,  and for the purpose of setting
forth, as provided in the Indenture, the form and substance of the Series 5.375%
Debentures  and the  terms,  provisions  and  conditions  thereof,  the  Company
covenants and agrees with the Trustee as follows:

                                   ARTICLE ONE

                         GENERAL TERMS AND CONDITIONS OF
                          THE SERIES 5.375% DEBENTURES

     SECTION  1.01.  There  shall  be and  is  hereby  authorized  a  series  of
Debentures designated the "5.375% Junior Subordinated Convertible Debentures Due
2027", limited in aggregate principal amount to $257,732,000 (except as provided
in this Section 1.01 and 7.01).  Upon exercise of the  overallotment  option set
forth in the  Underwriting  Agreement (as defined in the  Declaration of Trust),
additional Series 5.375%  Debentures in the aggregate  principal amount of up to
$25,773,200  may be executed by the  Company  and  delivered  to the Trustee for
authentication,  and the Trustee shall thereupon  authenticate  and deliver said
Series  5.375%  Debentures  to or upon the written  order of the Company,  which
order shall be  accompanied  by evidence  satisfactory  to the Trustee  that the
overallotment  option has been  exercised.  The Series 5.375%  Debentures  shall


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mature and the principal shall be due and payable  together with all accrued and
unpaid interest thereon,  including Compounded Interest (as hereinafter defined)
on March 31, 2027 (the "Maturity Date").

     SECTION 1.02. (a) Except as provided in Section 1.02(b),  the Series 5.375%
Debentures  shall  be  issued  in fully  registered  certificated  form  without
interest  coupons  in  denominations  of  $50  or  integral  multiples  thereof.
Principal and interest on the Series 5.375%  Debentures  issued in  certificated
form will be payable,  the  transfer of such Series  5.375%  Debentures  will be
registrable and such Series 5.375%  Debentures  will be exchangeable  for Series
5.375% Debentures bearing identical terms and provisions at the office or agency
of the  Company  in the  Borough of  Manhattan,  The City and State of New York;
provided,  however,  that  payment of interest  may be made at the option of the
Company by check mailed to the registered holder at such address as shall appear
in the Debenture  register and that the payment of principal with respect to the
Series 5.375%  Debentures  will only be made upon surrender of the Series 5.375%
Debentures  to the  Trustee.  Notwithstanding  the  foregoing,  so  long  as the
Property  Trustee  is the legal  owner and record  holder of the  Series  5.375%
Debentures,  the payment of the principal of and interest (including  Compounded
Interest,  if any) on the Series 5.375%  Debentures held by the Property Trustee
will be made by the Company in immediately  available  funds on the payment date
therefor  at  such  place  and  to  the  Property  Account  (as  defined  in the
Declaration  of  Trust)  established  and  maintained  by the  Property  Trustee
pursuant to the Declaration of Trust.

     (b) In connection with a Dissolution Event:

          (i)  Series 5.375% Debentures in certificated form may be presented to
               the  Trustee by the  Property  Trustee in  exchange  for a Global
               Debenture   representing  the  Series  5.375%  Debentures  in  an
               aggregate principal amount equal to all Outstanding Series 5.375%
               Debentures,  to be registered in the name of the  Depositary,  or
               its nominee,  and delivered by the Trustee to the  Depositary for
               crediting  to the  accounts of its  participants  pursuant to the
               instructions   of  the  Regular   Trustees  (as  defined  in  the
               Declaration  of Trust).  The Company  upon any such  presentation
               shall execute a Global  Debenture  representing the Series 5.375%
               Debentures  in such  aggregate  principal  amount and deliver the
               same to the Trustee for authentication and delivery in accordance
               with  the  Indenture  and  this  First  Supplemental   Indenture.
               Payments  on the  Series  5.375%  Debentures  issued  as a Global
               Debenture will be made to the Depositary; and

          (ii) if  any  Preferred   Securities   are  held  in  non   book-entry
               certificated  form, Series 5.375% Debentures in certificated form
               may be presented  to the Trustee by the Property  Trustee and any
               Preferred Security  Certificate (as defined in


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               the Declaration of Trust) which represents  Preferred  Securities
               other than Preferred  Securities  held by the Clearing Agency (as
               defined  in  the  Declaration  of  Trust)  or its  nominee  ("Non
               Book-Entry  Preferred  Securities")  will be deemed to  represent
               beneficial interests in Series 5.375% Debentures presented to the
               Trustee by the Property  Trustee  having an  aggregate  principal
               amount  equal  to the  aggregate  liquidation  amount  of the Non
               Book-Entry  Preferred  Securities  until such Preferred  Security
               Certificate are presented to the Debenture Registrar for transfer
               or reissuance at which time such Preferred  Security  Certificate
               will be canceled and a Series 5.375% Debenture, registered in the
               name of the holder of the Preferred  Security  Certificate or the
               transferee of the holder of such Preferred Security  Certificate,
               as the case may be, with an aggregate  principal  amount equal to
               the  aggregate  liquidation  amount  of  the  Preferred  Security
               Certificate   canceled  will  be  executed  by  the  Company  and
               delivered  to the  Trustee  for  authentication  and  delivery in
               accordance  with  the  Indenture  and  this  First   Supplemental
               Indenture.  On issue of such  Series  5.375%  Debentures,  Series
               5.375%  Debentures with an equivalent  aggregate amount that were
               presented by the  Property  Trustee to the Trustee will be deemed
               to have been canceled.

     SECTION 1.03.  Each Series 5.375%  Debenture will bear interest at the rate
of 5.375% per annum from March 31, 1997 until the principal  thereof becomes due
and  payable,  and on any overdue  principal  and (to the extent that payment of
such interest is enforceable under applicable law) on any overdue installment of
interest at the same rate per annum,  compounded quarterly,  payable (subject to
the  provisions of Article  Three)  quarterly in arrears on the last day of each
calendar quarter (each an "Interest Payment Date", commencing on June 30, 1997),
to the person in whose name such  Series  5.375%  Debenture  or any  predecessor
Series 5.375%  Debenture is registered,  at the close of business on the regular
record date for such  interest  installment,  which,  except as set forth below,
shall be, in respect  of any  Series  5.375%  Debentures  of which the  Property
Trustee is the registered holder of or a Global Debenture, the close of business
on the business day next preceding that Interest  Payment Date.  Notwithstanding
the foregoing sentence,  if the Preferred Securities are no longer in book-entry
only form or if pursuant to the  provisions of Section  2.11(c) of the Indenture
the Series 5.375%  Debentures  are not  represented by a Global  Debenture,  the
regular  record  dates  for such  interest  installment  shall  be the  close of
business on the fifteenth  day of the month in which that Interest  Payment Date
occurs.  Any such interest  installment not punctually paid or duly provided for
shall  forthwith  cease to be payable to the registered  holders on such regular
record  date,  and may be paid to the  person in whose  name the  Series  5.375%
Debenture (or one or more Predecessor  Debentures) is registered at the close of
business on a special  record date to be fixed by the Trustee for the payment of
such defaulted interest, notice whereof shall be given to the registered holders
of the Series  5.375%  Debentures  not less than 10 days  prior to such  special
record  date,  or may be  paid  at any  time  in any  other  lawful  manner  not
inconsistent  with the  requirements  of any  securities  exchange  on which the
Series 5.375% Debentures may be listed,  and upon such notice as may be required
by such exchange, all as more fully provided in the Indenture.


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     The amount of interest payable for any period will be computed on the basis
of a 360-day year of twelve 30-day  months.  In the event that any date on which
interest is payable on the Series 5.375%  Debentures is not a business day, then
payment of interest payable on such date will be made on the next succeeding day
which is a business day (and without any interest or other payment in respect of
any such delay),  except that,  if such  business day is in the next  succeeding
calendar year, such payment shall be made on the immediately  preceding business
day, in each case with the same force and effect as if made on such date.

     If at any time AES  Trust I shall be  required  to pay any  taxes,  duties,
assessments or governmental  charges of whatever nature (other than  withholding
taxes)  imposed by the U.S.,  or any other taxing  authority,  then, in any such
case, the Company will pay as additional interest ("Additional Interest") on the
Series 5.375%  Debentures such  additional  amounts as shall be required so that
the net  amounts  received  and  retained  by AES Trust I after  paying any such
taxes,  duties,  assessments or other governmental  charges will be equal to the
amounts AES Trust I would have received had no such taxes, duties,  assessments,
or other governmental charges been imposed.

                                   ARTICLE TWO

                               OPTIONAL REDEMPTION
                         OF THE SERIES 5.375% DEBENTURES

     SECTION  2.01.  Except as  provided  in  Section  2.02 and  subject  to the
provisions  below,  Series 5.375%  Debentures may not be redeemed by the Company
prior to March 31, 2000. Subject to the terms of Article Three of the Indenture,
the  Company  shall have the right to redeem the Series  5.375%  Debentures,  in
whole or in part,  from time to time, on or after March 31, 2000,  upon not less
than  30 nor  more  than 60 days  notice  to the  Holder  of the  Series  5.375%
Debentures,  at the following prices  (expressed as percentages of the principal
amount of the Series  5.375%  Debentures)  (the  "Optional  Redemption  Price"),
together  with any accrued and unpaid  interest  thereon,  including  Compounded
Interest  (as  defined  herein),  if any,  to, but  excluding,  the date of such
redemption, if redeemed during the 12-month period beginning March 31:

                Year                               Redemption Price
                ----                               ----------------
                2000                                   103.359%
                2001                                   102.688%
                2002                                   102.016%
                2003                                   101.344%
                2004                                   100.672%

and 100% if redeemed on or after March 31, 2005.


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     If the Series 5.375%  Debentures are redeemed on any Interest Payment Date,
accrued  and  unpaid  interest  shall be  payable  to  Holders  of record on the
relevant record date.

     The Company may not redeem any Series 5.375%  Debentures unless all accrued
and unpaid interest thereon,  including  Compounded  Interest,  if any, has been
paid for all quarterly periods  terminating on or prior to the date of notice of
redemption.  So long as the corresponding Trust Securities are outstanding,  the
proceeds from the  redemption of the Series  5.375%  Debentures  will be used to
redeem the Trust Securities.

     If  the  Company  gives  a  notice  of  redemption  in  respect  of  Junior
Subordinated Debentures (which notice will be irrevocable), then, by 12:00 noon,
New York City time, on the redemption date, the Company will deposit irrevocably
with the Indenture  Trustee funds  sufficient to pay the  applicable  Redemption
Price  and  will  give  irrevocable  instructions  and  authority  to  pay  such
Redemption Price to the holders of the Junior Subordinated Debentures.

     If any date fixed for redemption of Junior Subordinated Debentures is not a
Business Day, then payment of the Redemption  Price payable on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other payment in respect of any such delay) except that, if such Business Day
falls in the next calender  year,  such payment will be made on the  immediately
preceding  Business  Day, in each case with the same force and effect as if made
on such date fixed for redemption.

     In the event of any  redemption in part,  the Company shall not be required
to (i) issue,  register  the  transfer  of or exchange  any Junior  Subordinated
Debentures  during a period  beginning at the opening of business 15 days before
any selection for redemption of Junior Subordinated Debentures and ending at the
close  of  business  on the  earliest  date on  which  the  relevant  notice  of
redemption  is deemed to have been given to all  holders of Junior  Subordinated
Debentures  to be redeemed  and (ii)  register  the  transfer of or exchange any
Junior Subordinated Debentures so selected for redemption,  in whole or in part,
except  the  unredeemed  portion  of any Junior  Subordinated  Debentures  being
redeemed in part.

     SECTION 2.02.  If, at any time, a Tax Event (as defined  below) shall occur
or be  continuing  and (i) the  Regular  Trustees  and the  Company  shall  have
received an opinion (a  "Redemption  Tax  Opinion") of a  nationally  recognized
independent  tax counsel  experienced in such matters that, as a result of a Tax
Event,  there is more  than an  insubstantial  risk  that the  Company  would be
precluded from deducting the interest on the Series 5.375% Debentures for United
States  federal  income tax purposes even if the Series 5.375%  Debentures  were
distributed  to the holders of Preferred  Securities  and Common  Securities  in
liquidation  of  such  holder's  interest  in AES  Trust I as set  forth  in the
Declaration  of Trust or (ii) the Regular  Trustees  shall have been informed by
such tax counsel  that a No  Recognition  Opinion (as defined  below)  cannot be
delivered to AES Trust I, the Company shall have the right at any time, upon not
less  than 30 nor  more  than


                                       7





60 days' notice,  to redeem the Series 5.375% Debentures in whole or in part for
cash at a price equal to 100% of the principal amount thereof, together with any
accrued and unpaid interest thereon,  including Compounded Interest, if any, to,
but excluding the date of redemption, within 90 days following the occurrence of
such Tax Event;  provided,  however,  that, if at the time there is available to
the Company or the Regular  Trustees on behalf of AES Trust I the opportunity to
eliminate,  within such 90 day period,  the Tax Event by taking some ministerial
action ("Ministerial  Action"),  such as filing a form or making an election, or
pursuing some other similar reasonable  measure,  which has no adverse effect on
AES Trust I, the Company or the holders of the Preferred Securities, the Company
or the Regular  Trustees  on behalf of AES Trust I will  pursue such  measure in
lieu of redemption and provided  further that the Company shall have no right to
redeem the Series 5.375%  Debentures while the Regular Trustees on behalf of AES
Trust I are pursuing any such Ministerial Action.

     "Tax Event"  means that the Company  and the  Regular  Trustees  shall have
obtained an opinion of nationally recognized independent tax counsel experienced
in such  matters (a  "Dissolution  Tax  Opinion") to the effect that on or after
March 24, 1997 as a result of (a) any  amendment  to, or change in, the laws (or
any regulations thereunder) of the United States or any political subdivision or
taxing  authority  thereof or therein,  (b) any  amendment  to, or change in, an
interpretation or application of any such laws or regulations by any legislative
body,  court,   governmental  agency  or  regulatory  authority  (including  the
enactment of any  legislation  and the  publication of any judicial  decision or
regulatory determination), (c) any interpretation or pronouncement that provides
for a position  with respect to such laws or  regulations  that differs from the
theretofore  generally  accepted  position  or  (d)  any  action  taken  by  any
governmental  agency  or  regulatory  authority,  which  amendment  or change is
enacted,   promulgated,   issued  or  effective  or  which   interpretation   or
pronouncement  is issued or announced or which action is taken,  in each case on
or after  March 24, 1997 there is more than an  insubstantial  risk that (i) AES
Trust I is,  or will be within 90 days of the date  thereof,  subject  to United
States  federal  income tax with  respect to income  accrued or  received on the
Series 5.375% Debentures,  (ii) AES Trust I is, or will be within 90 days of the
date thereof, subject to more than a de minimis amount of taxes, duties or other
governmental  charges or (iii) interest payable by the Company to AES Trust I on
the Series 5.375%  Debentures is not, or within 90 days of the date thereof will
not be, deductible by the Company for United States federal income tax purposes.

     "No  Recognition  Opinion"  means an  opinion  of a  nationally  recognized
independent tax counsel  experienced in such matters,  which opinion may rely on
any then applicable published revenue ruling of the Internal Revenue Service, to
the effect that the holders of the Preferred  Securities  will not recognize any
gain or loss for United  States  federal  income tax  purposes  as a result of a
dissolution of AES Trust I and  distribution of the Series 5.375%  Debentures as
provided in the Declaration of Trust.

     SECTION 2.03. If the Series 5.375%  Debentures are only partially  redeemed
pursuant to this Article Two, the Series 5.375%  Debentures will be redeemed pro
rata or


                                       8





by lot or by any other method  utilized by the Trustee,  provided that if at the
time of  redemption,  the Series 5.375%  Debentures  are  registered as a Global
Debenture,  the Depository  shall determine by lot the principal  amount of such
Series  5.375%  Debentures  held by each  Debenture  Holder  to be  redeemed  in
accordance with its customary  procedures.  Notwithstanding the foregoing,  if a
partial redemption of the Series 5.375% Debentures would result in the delisting
of the  Preferred  Securities  by any  national  securities  exchange  or  other
organization  on which the  Preferred  Securities  are then listed,  the Company
shall not be permitted to effect such  partial  redemption  and will only redeem
the Series 5.375% Debentures in whole.


                                  ARTICLE THREE
                      EXTENSION OF INTEREST PAYMENT PERIOD

     SECTION  3.01.  So long as the  Company is not in default in the payment of
interest on the Series 5.375%  Debentures,  the Company shall have the right, at
any time during the term of the Series 5.375%  Debentures,  from time to time to
extend the interest payment period of such Series 5.375% Debentures for up to 20
consecutive quarterly interest periods (the "Extended Interest Payment Period"),
at the end of which period the Company shall pay all interest accrued and unpaid
thereon  (together with interest  thereon at the rate of 5.375% per annum to the
extent   permitted  by  applicable  law,   compounded   quarterly   ("Compounded
Interest")); provided that no Extended Interest Payment Period may extend beyond
the Maturity Date or redemption  date of the Series  5.375%  Debentures.  During
such Extended  Interest  Payment Period the Company shall not declare or pay any
dividend on, or redeem, purchase,  acquire or make a distribution or liquidation
payment with respect to, any of its common stock or preferred  stock or make any
guarantee  payments with respect  thereto;  provided that the foregoing will not
apply to any stock  dividends paid by the Company in Common Stock.  Prior to the
termination of any such Extended  Interest  Payment Period,  the Company may pay
all or any portion of the interest  accrued on the Series  5.375%  Debentures on
any Interest  Payment  Date to holders of record on the regular  record date for
such  Interest  Payment  Date or from time to time  further  extend such Period;
provided  that such Period  together  with all such further  extensions  thereof
shall not exceed 20 consecutive quarterly interest periods. Upon the termination
of any Extended  Interest Payment Period and upon the payment of all accrued and
unpaid  interest then due,  together with Compounded  Interest,  the Company may
select  a new  Extended  Interest  Payment  Period,  subject  to  the  foregoing
requirements.  No interest shall be due and payable during an Extended  Interest
Payment Period,  except at the end thereof.  At the end of the Extended Interest
Payment  Period the  Company  shall pay all  interest  accrued and unpaid on the
Series  5.375%  Debentures  including  any  Compounded  Interest  which shall be
payable to the holders of the Series 5.375% Debentures in whose names the Series
5.375%  Debentures are registered in the Debenture  register on the first record
date after the end of the Extended Interest Payment Period.


                                       9





     SECTION  3.02.  (a) So long as the Property  Trustee is the legal owner and
holder  of record  of the  Series  5.375%  Debentures,  at the time the  Company
selects an Extended  Interest  Payment  Period,  the Company shall give both the
Property  Trustee  and the  Trustee  written  notice  of its  selection  of such
Extended  Interest  Payment  Period one business day prior to the earlier of (i)
the next succeeding date on which distributions on the Preferred  Securities are
payable or (ii) the date AES Trust I is  required  to give  notice of the record
date or the date such  distributions  are payable to the New York Stock Exchange
or other applicable self-regulatory  organization or to holders of the Preferred
Securities, but in any event not less than one business day prior to such record
date.  The  Company  shall  cause  AES Trust I to give  notice of the  Company's
selection  of such  Extended  Interest  Payment  Period  to the  holders  of the
Preferred Securities.

     (b) If as a result of a  Dissolution  Event Series 5.375%  Debentures  have
been distributed to holders of Preferred  Securities and Common  Securities,  at
the time the Company selects an Extended  Interest  Payment Period,  the Company
shall give the holders of the Series 5.375%  Debentures and the Trustee  written
notice of its selection of such  Extended  Interest  Payment  Period at least 10
business days prior to the earlier of (i) the next succeeding  Interest  Payment
Date or (ii) the date the  Company is  required  to give notice of the record or
payment date of such  interest  payment to the New York Stock  Exchange or other
applicable  self-regulatory  organization  or to holders  of the  Series  5.375%
Debentures.

     SECTION 3.03.  The quarter in which any notice is given pursuant to Section
3.02 shall be counted as one of the quarters  permitted in the maximum  Extended
Interest Payment Period permitted under this Article Three.


                                  ARTICLE FOUR
                COVENANTS APPLICABLE TO SERIES 5.375% DEBENTURES

     SECTION 4.01. So long as any Preferred  Securities remain outstanding,  the
Company will not declare or pay any dividends on, or redeem,  purchase,  acquire
or make a distribution or liquidation payment with respect to, any of its common
stock or preferred stock or make any guarantee  payments with respect thereto if
at such time (i) the Company  shall be in default with respect to its  Guarantee
Payments (as defined in the Guarantee  Agreement)  or other payment  obligations
under the  Guarantee  Agreement,  (ii) there  shall have  occurred  any Event of
Default  under the  Indenture  with respect to the Series  5.375%


                                       10





Debentures  or (iii) the Company  shall have given  notice of its election of an
Extended Interest Payment Period and such Period, or any extension  thereof,  is
continuing;  provided that the foregoing  will not apply to any stock  dividends
paid by the Company in Common Stock.

     SECTION  4.02.  In connection  with the  distribution  of the Series 5.375%
Debentures to the holders of the Preferred  Securities upon a Dissolution Event,
the Company will use its best efforts to list such Series  5.375%  Debentures on
the  New  York  Stock  Exchange  or on  such  other  exchange  as the  Preferred
Securities are then listed and traded.

     SECTION  4.03.  The  Company  covenants  and agrees for the  benefit of the
holders of the Preferred  Securities to comply fully with all of its obligations
and agreements under the Declaration of Trust,  including,  without  limitation,
its obligations under Article 4 thereof.

     SECTION 4.04. Prior to the distribution of Series 5.375%  Debentures to the
holders of Preferred  Securities upon a Dissolution Event, the Company covenants
and agrees for the benefit of the holders of the Preferred Securities (i) not to
cause or permit the Common  Securities to be transferred  except as permitted by
the  Declaration of Trust and (ii) that it will use reasonable  efforts to cause
the Trust to continue to be treated as a grantor trust for United States federal
income tax purposes,  except in  connection  with a  distribution  of the Series
5.375% Debentures as provided in the Declaration of Trust.


                                  ARTICLE FIVE
                            CONVERSION OF DEBENTURES

     SECTION 5.01.  Subject to and upon  compliance  with the provisions of this
Article Five, the Series 5.375%  Debentures are convertible at the option of the
Holder,  at any time through the close of business on March 31, 2027 (or, in the
case of Series 5.375%  Debentures  called for redemption,  prior to the close of
business on the Business Day prior to the  corresponding  redemption  date) into
fully paid and nonassessable shares of


                                       11





Common Stock of the Company at an initial  conversion  rate of 0.6906  shares of
Common  Stock  for each $50 in  aggregate  principal  amount  of  Series  5.375%
Debentures  (equal to a  conversion  price (as adjusted  from time to time,  the
"Conversion Price") of $72.40 per share of Common Stock),  subject to adjustment
as described in this Article  Five.  A Holder of Series  5.375%  Debentures  may
convert any portion of the principal amount of the Series 5.375% Debentures into
that number of fully paid and  nonassessable  shares of Common Stock obtained by
dividing the principal amount of the Series 5.375% Debentures to be converted by
such conversion price. All calculations under this Article Five shall be made to
the nearest cent or to the nearest 1/100th of a share, as the case may be.

     SECTION 5.02. (a) In order to convert all or a portion of the Series 5.375%
Debentures,  the  Holder  thereof  shall  deliver  to the  Conversion  Agent  an
irrevocable  Notice of Conversion  setting forth the principal  amount of Series
5.375%  Debentures  to be converted,  together with the name or names,  if other
than the  Holder,  in which the  shares of Common  Stock  should be issued  upon
conversion  and, if such Series 5.375%  Debentures are definitive  Series 5.375%
Debentures, surrender to the Conversion Agent the Series 5.375% Debentures to be
converted,  duly endorsed or assigned to the Company or in blank. In addition, a
holder of Trust Securities may exercise its right under the Declaration of Trust
to  convert  such  Trust  Securities  into  Common  Stock by  delivering  to the
Conversion  Agent  an  irrevocable   Notice  of  Conversion  setting  forth  the
information  called for by the preceding  sentence and directing the  Conversion
Agent to (i) exchange  such Trust  Security  for a portion of the Series  5.375%
Debentures  held by the Trust (at an exchange  rate of $50  principal  amount of
Series 5.375%  Debentures for each Trust Security) and (ii) immediately  convert
such Series 5.375%  Debentures,  on behalf of such holder,  into Common Stock of
the Company  pursuant to this Article Five and, if such Trust  Securities are in
definitive form,  surrendering such Trust Securities,  duly endorsed or assigned
to the Company or in blank. So long as any Trust Securities are outstanding, the
Trust shall not convert any Series 5.375% Debentures except pursuant to a Notice
of Conversion delivered to the Conversion Agent by a holder of Trust Securities.
Any reference  herein to a "holder" of Trust Securities shall mean a "Holder" of
such securities as defined in the Declaration of Trust.

     If a Preferred  Security is surrendered  for conversion  after the close of
business on any regular record date for payment of a Distribution and before the
opening of  business  on the  corresponding  Distribution  payment  date,  then,
notwithstanding  such conversion,  the Distribution payable on such Distribution
payment date will be paid in cash to the person in whose name the Series  5.375%
Debenture is registered at the close of business on such record date, and (other
than a Series 5.375%  Debenture or a portion of a Series 5.375% Debenture called
for redemption on a redemption  date occurring  after such record date and on or
prior to such Distribution payment date) when so surrendered for conversion, the
Series 5.375% Debenture must be accompanied by payment of an amount equal to the
Distribution  payable on such  Distribution  payment  date.  Except as otherwise
provided in the immediately preceding sentence, in the case of any Series 5.375%
Debenture which is converted,  interest whose Maturity Date is after the date of
conversion


                                       12





of such Series 5.375% Debenture shall not be payable,  and the Company shall not
make nor be required to make any other  payment,  adjustment  or allowance  with
respect to accrued but unpaid  interest  on the Series  5.375%  Debenture  being
converted,  which shall be deemed to be paid in full. Each  conversion  shall be
deemed to have been effected  immediately  prior to the close of business on the
day on which the Notice of Conversion  was received (the  "Conversion  Date") by
the  Conversion  Agent  from  the  Holder  or  from a  holder  of the  Preferred
Securities  effecting a conversion  thereof  pursuant to its  conversion  rights
under the  Declaration,  as the case may be. The Person or Persons  entitled  to
receive the Common Stock issuable upon such conversion  shall be treated for all
purposes  as the  record  holder  or  holders  of such  Common  Stock  as of the
Conversion Date. As promptly as practicable on or after the Conversion Date, the
Company shall issue and deliver at the office of the  Conversion  Agent,  unless
otherwise  directed by the Holder in the Notice of Conversion,  a certificate or
certificates  for the number of full shares of Common Stock  issuable  upon such
conversion,  together with the cash payment,  if any, in lieu of any fraction of
any share to the Person or Persons  entitled to receive the same. The Conversion
Agent shall deliver such certificate or certificates to such Person or Persons.

     (b) The Company's delivery upon conversion of the fixed number of shares of
Common Stock into which the Series 5.375%  Debentures are convertible  (together
with the cash payment,  if any, in lieu of fractional shares) shall be deemed to
satisfy the Company's  obligation to pay the principal amount at maturity of the
portion  of Series  5.375%  Debentures  so  converted  and any  unpaid  interest
(including  Compounded Interest) accrued on such Series 5.375% Debentures at the
time of such conversion.

     (c) No  fractional  shares  of Common  Stock  will be issued as a result of
conversion, but in lieu thereof, the Company shall pay to the Conversion Agent a
cash  adjustment in an amount equal to the same fraction of the Closing Price of
such fractional  interest on the date on which the Series 5.375% Debentures were
duly surrendered to the Conversion Agent for conversion,  or, if such day is not
a day on which any securities are traded on the national  securities exchange or
quotation  system used to determine the Closing Price (a "Trading  Day"), on the
next Trading Day, and the  Conversion  Agent in turn will make such payment,  if
any,  to the  Holder  of the  Series  5.375%  Debentures  or the  holder  of the
Preferred Securities so converted.

     (d) In the event of the  conversion of any Series 5.375%  Debenture in part
only,  a new  Series  5.375%  Debenture  or  Series  5.375%  Debentures  for the
unconverted  portion  thereof  will be issued in the name of the Holder  thereof
upon the cancellation thereof in accordance with Section 2.05 of the Indenture.

     (e) In  effecting  the  conversion  transactions  described in this Section
5.02,  the  Conversion  Agent is acting  as agent of the  holders  of  Preferred
Securities   (in  the  exchange  of  Preferred   Securities  for  Series  5.375%
Debentures)  and as agent of the  Holders of Series  5.375%  Debentures  (in the
conversion of Series 5.375%  Debentures into Common Stock),  as the case may be.
The  Conversion  Agent  is  hereby  authorized  (i) to  exchange  Series  5.375%
Debentures  held by the Trust  from  time to time for  Preferred  Securities  in


                                       13





connection  with the conversion of such Preferred  Securities in accordance with
this  Article  Five and (ii) to convert  all or a portion  of the Series  5.375%
Debentures  into Common  Stock and  thereupon  to deliver  such shares of Common
Stock in accordance  with the  provisions of this Article Five and to deliver to
the Trust a new Series  5.375%  Debenture or Series  5.375%  Debentures  for any
resulting unconverted principal amount.

     SECTION 5.03. (a) The Conversion  Price shall be adjusted from time to time
as follows:

          (i) In  case  the  Company  shall  pay or  make a  dividend  or  other
          distribution  on Common  Stock in shares  of  Common  Stock,  then the
          Conversion  Price in  effect at the  opening  of  business  on the day
          following  the  date  fixed  for  the  determination  of  shareholders
          entitled  to receive  such  dividend  or other  distribution  shall be
          reduced  by  multiplying  such  Conversion  Price  by a  fraction  the
          numerator  of which  shall be the  number of  shares  of Common  Stock
          outstanding  at the  close  of  business  on the date  fixed  for such
          determination  and the  denominator  of which shall be the sum of such
          number of  shares  and the total  number of shares  constituting  such
          dividend or other  distribution,  such  reduction to become  effective
          immediately  after the opening of business  on the day  following  the
          date  fixed  for  such   determination.   For  the  purposes  of  this
          subparagraph  (i),  the  number of shares of Common  Stock at any time
          outstanding  shall not  include  shares  held in the  treasury  of the
          Company  (except to the extent such dividend or  distribution is being
          made with respect to such shares) but shall include shares issuable in
          respect of scrip certificates issued in lieu of fractions of shares of
          Common Stock.

          (ii)  In  case  the  outstanding  shares  of  Common  Stock  shall  be
          subdivided  into a greater number of shares of Common Stock,  then the
          Conversion  Price in  effect at the  opening  of  business  on the day
          following the day upon which such subdivision  becomes effective shall
          be proportionately  reduced, and, conversely,  in case the outstanding
          shares of Common  Stock  shall be  combined  into a smaller  amount of
          shares of Common  Stock,  then the  Conversion  Price in effect at the
          opening  of  business  on the day  following  the day upon  which such
          combination becomes effective shall be proportionately increased, such
          reduction  or  increase,  as the  case  may be,  to  become  effective
          immediately after the opening of business on the day following the day
          upon which such subdivision or combination becomes effective.

          (iii) In case the  Company  shall  issue  rights  or  warrants  to all
          holders of Common Stock  entitling them (for a period  expiring


                                       14





          within 45 days after the record date fixed for a distribution  of such
          rights or  warrants)  to  subscribe  for or purchase  shares of Common
          Stock at a price per  share  less than the  Current  Market  Price (as
          hereinafter defined) per share (determined as provided in subparagraph
          (vii) below) of Common  Stock on the date fixed for the  determination
          of  shareholders  entitled to receive  such rights or warrants  (other
          than pursuant to a dividend  reinvestment  plan),  then the Conversion
          Price in effect at the opening of business  on the day  following  the
          date fixed for such determination shall be reduced by multiplying such
          Conversion  Price by a fraction  the  numerator  of which shall be the
          number of shares of Common Stock  outstanding at the close of business
          on the date fixed for such  determination plus the number of shares of
          Common Stock which the  aggregate  of the offering  price of the total
          number of  shares  of Common  Stock so  offered  for  subscription  or
          purchase   would  purchase  at  such  Current  Market  Price  and  the
          denominator  shall be the number of shares of Common Stock outstanding
          at the close of business on the date fixed for such determination plus
          the number of shares of Common  Stock so offered for  subscription  or
          purchase,  such reduction to become  effective  immediately  after the
          opening  of  business  on the day  following  the date  fixed for such
          determination. For the purposes of this subparagraph (iii), the number
          of shares of Common  Stock at any time  outstanding  shall not include
          shares held in the  treasury of the Company but shall  include  shares
          issuable in respect of scrip certificates  issued in lieu of fractions
          of shares of Common Stock.  The Company agrees not to issue any rights
          or warrants in respect of shares of Common  Stock held in the treasury
          of the  Company.  To the extent  that  shares of Common  Stock are not
          delivered  after  the  expiration  of such  rights  or  warrants,  the
          Conversion  Price shall be  readjusted to the  Conversion  Price which
          would  then be in effect  had the  adjustments  made in respect of the
          issuance of such rights or warrants been made on the basis of delivery
          of only the number of shares of Common Stock actually delivered.

          (iv) Subject to the second  paragraph of this  subparagraph  (iv),  in
          case the Company  shall,  by dividend or otherwise,  distribute to all
          holders of Common  Stock (A) shares of  capital  stock of the  Company
          (other than Common Stock), (B) evidence of indebtedness of the Company
          and/or (C) other assets (including  securities,  but excluding (1) any
          rights or warrants  referred to in subparagraph  (iii) above,  (2) any
          rights or warrants to obtain capital stock of a company other than the
          Company  or  any  subsidiary  of the  Company  (including  any  rights
          offerings of the Company with respect to capital stock of companies in
          which the  Company  has an


                                       15





          investment (a "Rights  Offering")),  (3) dividends or distributions in
          connection  with the  liquidation,  dissolution  or  winding-up of the
          Company,  (4) dividends  payable  solely in cash that may from time to
          time be  fixed  by the  Board  of  Directors  of the  Company  and (5)
          dividends or  distributions  referred to in  subparagraph  (i) above),
          then in each case (unless the Company  makes the election  referred to
          in the next sentence) the  Conversion  Price shall be adjusted so that
          the  same  shall  equal  the  price   determined  by  multiplying  the
          Conversion Price in effect  immediately prior to the close of business
          on such record date by a fraction the  numerator of which shall be the
          Current Market Price per share (determined as provided in subparagraph
          (vii) below) of the Common  Stock on such record date (the  "Reference
          Date")  less the then  fair  market  value on the  Reference  Date (as
          determined  in good faith by the Board of  Directors  of the  Company,
          whose  determination  shall be conclusive  and shall be described in a
          statement filed with the Depositary and the Trustee) of the portion of
          the shares of capital stock of the Company,  evidences of indebtedness
          or other assets so  distributed  (and for which an  adjustment  to the
          Conversion Price has not been made previously pursuant to the terms of
          this  Article  Five)  applicable  to one share of Common Stock and the
          denominator shall be such Current Market Price per share of the Common
          Stock,  such adjustment to become effective  immediately  prior to the
          opening of business on the day following the Reference Date.  However,
          the  Company  may  elect,  in its  sole  discretion,  in  lieu  of the
          foregoing  adjustment,  to make adequate provision so that each holder
          of Securities shall have the right to receive upon conversion  thereof
          the  amount  and  kind  of  shares  of  capital  stock,  evidences  of
          indebtedness  or other assets such holder would have received had such
          holder  converted  such  shares on such record  date.  If the Board of
          Directors  of the  Company  determines  the fair  market  value of any
          distribution  for purposes of this  subparagraph  (iv) by reference to
          the actual or when issued trading market for any securities (including
          shares of capital  stock or evidence of  indebtedness  of the Company)
          comprising a distribution of securities,  it must in doing so consider
          the price in such market over the period used in computing the Current
          Market Price of the Common Stock.

          For purposes of this  subparagraph  (iv), any dividend or distribution
          that includes both (x) any of the items  described in clauses (A), (B)
          or (C) of the first paragraph of this subparagraph (iv) and (y) Common
          Stock or rights or warrants to subscribe for or purchase  Common Stock
          of the type  referred to in  subparagraph  (iii) shall be deemed to be
          (1) a  dividend  or  distribution  of shares of  capital  stock of the
          Company (other than Common Stock),  evidences of


                                       16





          indebtedness of the Company or other assets of the type referred to in
          clause (C) of the first  paragraph of this  subparagraph  (iv) (making
          any Conversion  Price reduction  required by this  subparagraph  (iv))
          immediately  followed by (2) a dividend or distribution of such Common
          Stock or rights  or  warrants  to  purchase  Common  Stock of the type
          referred to in subparagraph (iii) (making any further Conversion Price
          reduction  required  by  subparagraph  (i) or  (iii)  of this  Section
          5.03(a)),   except  (A)  the  Reference   Date  of  such  dividend  or
          distribution as defined in this subparagraph (iv) shall be substituted
          as "the date fixed for the  determination of shareholders  entitled to
          receive  such  rights  or  warrants"  and  "the  date  fixed  for such
          determination"  within the meaning of  subparagraphs  (i) and (iii) of
          this Section  5.03(a) and (B) any shares of Common  Stock  included in
          such dividend or distribution shall not be deemed  "outstanding at the
          close of business on the date fixed for such determination" within the
          meaning of subparagraph (i) of this Section 5.03(a).

          The occurrence of a distribution  or the occurrence of any other event
          as a result of which  holders of Series 5.375%  Debentures  converting
          such notes into Common Stock hereunder will not be entitled to receive
          rights issued pursuant to any shareholder  protective rights agreement
          now or hereafter in effect (the "Other Rights") in the same amount and
          manner as if such holders had converted such shares  immediately prior
          to the occurrence of such  distribution or other event shall be deemed
          a  distribution  of  Other  Rights  for  the  purposes  of  conversion
          adjustments  pursuant to this subparagraph (iv). In lieu of making any
          adjustment to the Conversion Price under this  subparagraph  (iv) as a
          result of such a distribution of Other Rights,  the Company may elect,
          in its sole discretion, to provide that Other Rights shall be issuable
          in the same amount and manner  upon  conversion  of the Series  5.375%
          Debentures  without  regard to  whether  the  shares  of Common  Stock
          issuable upon  conversion of the Series 5.375%  Debentures were issued
          before or after such distribution or other event.

          (v) In case the Company shall,  by dividend or otherwise,  at any time
          distribute cash to all holders of Common Stock, excluding (A) any cash
          dividends  on  Common  Stock to the  extent  that the  aggregate  cash
          dividends per share of Common Stock in any consecutive 12-month period
          do not exceed the greater of (x) the amount per share of Common  Stock
          of the cash  dividends  paid on the  Common  Stock in the  immediately
          preceding  12-month period,  to the extent that such dividends for the
          immediately  preceding  12- month period did not require an adjustment
          to the Conversion Price


                                       17





          pursuant to this subparagraph (v) (as adjusted to reflect subdivisions
          or combinations of the Common Stock) and (y) 15% of the average of the
          daily Closing Prices (as hereinafter  defined) of the Common Stock for
          the ten  consecutive  Trading  Days  immediately  prior to the date of
          declaration of such dividend and (B) any dividend or  distribution  in
          connection  with the  liquidation,  dissolution  or  winding-up of the
          Company,  whether  voluntary or involuntary;  or any redemption of any
          Other Rights;  provided,  however,  that no  adjustment  shall be made
          pursuant to this subparagraph (v) if such distribution would otherwise
          constitute  a  Fundamental  Change  (as  hereinafter  defined)  and be
          reflected  in a  resulting  adjustment  to  the  Conversion  Price  as
          provided in this Article  Five) then, in each case (unless the Company
          makes the election  referred to in the proviso following this clause),
          the Conversion Price shall be reduced so that the same shall equal the
          price  determined by multiplying the Conversion Price in effect at the
          close of business on such record date by a fraction  the  numerator of
          which  shall be the Closing  Price of a share of Common  Stock on such
          record date less the amount of cash so distributed  (to the extent not
          excluded as provided  above)  applicable to one share of Common Stock,
          and the  denominator  shall be the Closing  Price of a share of Common
          Stock,  such reduction to become  effective  immediately  prior to the
          opening of business on the day following  such record date;  provided,
          however,  that the Company may elect, in its sole discretion,  in lieu
          of the foregoing  adjustment,  to make adequate provision so that each
          holder of Securities  shall  thereafter have the right to receive upon
          conversion the amount of cash such holder would have received had such
          holder  converted each Security on such record date. If any adjustment
          is  required  to be made as set  forth in this  subparagraph  (v) as a
          result of a distribution  which is a dividend  described in clause (A)
          of this  subparagraph  (v),  such  adjustment  will be based  upon the
          amount by which such  distribution  exceeds the amount of the dividend
          permitted  to  be  excluded  pursuant  to  such  clause  (A)  of  this
          subparagraph  (v). If an adjustment is required to be made pursuant to
          this subparagraph (v) as a result of a distribution  which is not such
          a  dividend,  such  adjustment  would be based upon the full amount of
          such distribution.

          (vi) In case of the  consummation of a tender or exchange offer (other
          than an odd-lot tender offer) made by the Company or any subsidiary of
          the Company for all or any portion of the outstanding shares of Common
          Stock to the extent that the cash and fair market value (as determined
          in  good  faith  by the  Board  of  Directors  of the  Company,  whose
          determination  shall  be  conclusive  and  shall  be  described  in  a
          resolution of such Board) of any other consideration


                                       18





          included in such  payment  per share of Common  Stock at the last time
          (the  "Expiration  Time") tenders or exchanges may be made pursuant to
          such tender or exchange  offer (as  amended)  exceed by more than 10%,
          with any smaller excess being  disregarded in computing the adjustment
          to the Conversion Price provided in this subparagraph  (vi), the first
          reported  sale price per share of Common Stock on the Trading Day next
          succeeding the  Expiration  Time,  then the Conversion  Price shall be
          reduced  so  that  the  same  shall  equal  the  price  determined  by
          multiplying the Conversion  Price in effect  immediately  prior to the
          Expiration  Time by a fraction  the  numerator  of which  shall be the
          number of shares of Common Stock  outstanding  (including any tendered
          or exchanged  shares) on the Expiration  Time  multiplied by the first
          reported  sale  price  of the  Common  Stock on the  Trading  Day next
          succeeding the Expiration Time and the denominator shall be the sum of
          (x) the fair market value  (determined  as aforesaid) of the aggregate
          consideration  payable to shareholders  based on the acceptance (up to
          any maximum specified in the terms of the tender or exchange offer) of
          all shares  validly  tendered or exchanged and not withdrawn as of the
          Expiration  Time  (the  shares  deemed  so  accepted,  up to any  such
          maximum,  being  referred to as the  "Purchased  Shares")  and (y) the
          product of the number of shares of Common Stock  outstanding (less any
          Purchased  Shares) on the Expiration  Time and the first reported sale
          price of the  Common  Stock on the  Trading  Day next  succeeding  the
          Expiration Time, such reduction to become effective  immediately prior
          to the opening of business on the day following the Expiration Time.

          (vii) For the purpose of any computation  under this Article Five, the
          "Current  Market  Price per share" of Common Stock on any day shall be
          deemed to be the average of the daily Closing  Prices (as  hereinafter
          defined)  per share of Common  Stock for the ten  consecutive  Trading
          Days prior to and including the date in question;  provided,  however,
          that  (1) if the "ex"  date (as  hereinafter  defined)  for any  event
          (other than the issuance, distribution or Fundamental Change requiring
          such  computation) that requires an adjustment to the Conversion Price
          pursuant to this Article Five (the "Other  Event")  occurs during such
          ten  consecutive  Trading  Days and  prior  to the  "ex"  date for the
          issuance,   distribution   or   Fundamental   Change   requiring  such
          computation (the "Current Event"),  the Closing Price for each Trading
          Day prior to the "ex" date for such Other  Event  shall be adjusted by
          multiplying  such  Closing  Price by the same  fraction  by which  the
          Conversion  Price is so  required  to be  adjusted as a result of such
          Other  Event,  (2) if the "ex" date for any Other  Event  occurs on or
          after the "ex" date for the


                                       19





          Current  Event and on or prior to the date in  question,  the  Closing
          Price for each  Trading  Day on and after the "ex" date for such Other
          Event shall be  adjusted  by  multiplying  such  Closing  Price by the
          reciprocal  of the  fraction  by  which  the  Conversion  Price  is so
          required to be adjusted as a result of such Other Event (provided that
          in the event that such fraction is required to be determined at a date
          subsequent to the date in question and with reference to events taking
          place  subsequent  to the date in question,  the Board of Directors of
          the  Company or, to the extent  permitted  by  applicable  law, a duly
          authorized committee thereof,  whose determination shall be conclusive
          and described in a resolution of the Board of Directors of the Company
          or such duly authorized  committee thereof,  as the case may be, shall
          in good faith  estimate such fraction  based on  assumptions  it deems
          reasonable  regarding such events taking place  subsequent to the date
          in question, and such estimated fraction shall be used for purposes of
          such  adjustment  until such time as the actual  fraction by which the
          Conversion  Price is so  required  to be  adjusted as a result of such
          Other Event is  determined),  and (3) if the "ex" date for the Current
          Event  is on or  prior  to the date in  question,  after  taking  into
          account any adjustment  required pursuant to clause (1) or (2) of this
          proviso,  the Closing Price for each Trading Day on or after such "ex"
          date shall be  adjusted  by adding  thereto the amount of any cash and
          the fair  market  value (as  determined  in good faith by the Board of
          Directors  of the Company or, to the extent  permitted  by  applicable
          law, a duly authorized  committee  thereof in a manner consistent with
          any  determination  of such value for purposes of this  Article  Five,
          whose  determination shall be conclusive and described in a resolution
          of the Board of  Directors  of the  Company  or such  duly  authorized
          committee thereof, as the case may be) of the shares of capital stock,
          evidences of indebtedness or other assets being distributed applicable
          to one share of Common  Stock as of the close of  business  on the day
          before such "ex" date. For purposes of this  subparagraph  (vii),  the
          term  "ex"  date,   (1)  when  used  with  respect  to  any  issuance,
          distribution or Fundamental Change,  means the first date on which the
          Common  Stock trades  regular way on the  relevant  exchange or in the
          relevant market from which the Closing Price was obtained  without the
          right  to  receive  such  issuance,  such  distribution  or the  cash,
          securities, property or other assets distributable in such Fundamental
          Change to holders of the Common  Stock,  (2) when used with respect to
          any  subdivision or  combination of shares of Common Stock,  means the
          first  date on which  the  Common  Stock  trades  regular  way on such
          exchange or in such market after the time at which such subdivision or
          combination  becomes  effective  and (3) when used with respect to


                                       20





          any tender or exchange  offer means the first date on which the Common
          Stock trades  regular way on such exchange or in such market after the
          Expiration Time of such offer.

          (viii)  No  adjustment  in the  Conversion  Price  shall  be  required
          pursuant to this Section 5.03(a) unless the adjustment would require a
          change  of at  least 1% of such  price;  provided,  however,  that any
          adjustments  which  by  reason  of this  subparagraph  (viii)  are not
          required to be made shall be carried forward and taken into account in
          any  subsequent  adjustment.  All  calculations  shall  be made to the
          nearest  cent  (with  .005 being  rounded  upward)  or to the  nearest
          1/100th of a share (with .005 of a share being rounded upward), as the
          case may be. Notwithstanding  anything to the contrary in this Article
          Five,  the Company  from time to time may, to the extent  permitted by
          law,  reduce the  Conversion  Price by any amount for any period of at
          least 20 Business  Days, in which case the Company shall give at least
          15 days'  notice of such  reduction  to the  holders of Series  5.375%
          Debentures  and the  Trustee.  In  addition,  the Company  may, at its
          option,  make such  reductions in the Conversion  Price in addition to
          those set forth in this Article  Five, as it considers to be advisable
          in order to avoid or diminish  any income tax to any holders of shares
          of Common Stock  resulting from any dividend or  distribution of stock
          or issuance of rights or warrants to purchase or  subscribe  for stock
          or from any event  treated as such for income tax  purposes or for any
          other reasons.

          (ix)  In any  case  in  which  this  Article  Five  provides  that  an
          adjustment shall become effective  immediately after a record date for
          an event, the Company may defer until the occurrence of such event (A)
          issuing to the holder of any Series 5.375% Debentures  converted after
          such  record  date  and  before  the  occurrence  of  such  event  the
          additional  shares of Common Stock  issuable  upon such  conversion by
          reason of the  adjustment  required  by such  event over and above the
          Common Stock  issuable  upon such  conversion  before giving effect to
          such  adjustment  and (B) paying to such  holder any amount in cash in
          lieu of any fractional shares pursuant to this Article Five.

          (x) For purposes of this Article  Five,  "Common  Stock"  includes any
          stock of any class of the Company  which has no  preference in respect
          of  dividends or of amounts  payable in the event of any  voluntary or
          involuntary liquidation,  dissolution or winding-up of the Company and
          which is not subject to redemption by the Company. However, subject to
          the provisions of this Article Five,  shares issuable on conversion of
          Series  5.375%  Debentures  shall


                                       21





          include  only shares of the class  designated  as the  Company  Common
          Stock on the date of the initial issuance of Series 5.375%  Debentures
          by the  Company or shares of any class or classes  resulting  from any
          reclassification  or  reclassification   thereof  and  which  have  no
          preference in respect of dividends or of amounts  payable in the event
          of any voluntary or involuntary liquidation, dissolution or winding-up
          of the Company and which are not subject to redemption by the Company;
          provided,  however,  that if at any time there  shall be more than one
          such resulting  class,  the shares of each such class then so issuable
          shall be  substantially  in the  proportion  which the total number of
          shares of such class resulting from all such  reclassifications  bears
          to the total number of shares of all such classes  resulting  from all
          such reclassifications.

     (b) Whenever the Conversion Price is adjusted as herein provided:

          (i) the Company shall compute the adjusted  Conversion Price and shall
          prepare a  certificate  signed by the Chief  Financial  Officer or the
          Treasurer of the Company setting forth the adjusted  Conversion  Price
          and showing in reasonable  detail the facts upon which such adjustment
          is based,  and such  certificate  shall  forthwith  be filed  with the
          Trustee and the transfer  agent for the Preferred  Securities  and the
          Series 5.375% Debentures; and

          (ii) a notice  stating  the  Conversion  Price has been  adjusted  and
          setting  forth  the  adjusted   Conversion  Price  shall  as  soon  as
          practicable  be  mailed  by the  Company  to  all  record  holders  of
          Preferred  Securities  and the Series 5.375%  Debentures at their last
          addresses as they appear upon the stock  transfer books of the Company
          and the Trust.

     SECTION  5.04.  (a) In the event that the  Company  shall be a party to any
transaction  or  series  of  transactions  constituting  a  Fundamental  Change,
including,  without limitation,  (i) any recapitalization or reclassification of
shares of Common Stock (other than a change in the par value or as a result of a
subdivision or combination of the Common Stock),  (ii) any  consolidation of the
Company with, or merger of the Company into, any other corporation or any merger
of another  corporation  into the Company as a result of which holders of Common
Stock  shall be  entitled  to receive  securities  or other  property  or assets
(including  cash) with  respect to or in exchange for Common Stock (other than a
merger  which does not result in a  reclassification,  conversion,  exchange  or
cancellation of outstanding shares of Common Stock),  (iii) any sale or transfer
of all or substantially all of the assets of the Company, or (iv) any compulsory
share  exchange,  pursuant to any of which the holders of Common  Stock shall be
entitled to receive other securities,  cash or other property,  then appropriate
provision  shall be made as part of the terms of such  transaction  or series of
transactions so that the holder of each Series 5.375%


                                       22




Debenture  then  outstanding  shall have the right  thereafter  to convert  such
Series  5.375%  Debenture  only  into  (A)  if any  such  transaction  does  not
constitute a Common Stock Fundamental Change (as hereinafter defined),  the kind
and  amount of the  securities,  cash or other  property  that  would  have been
receivable upon such recapitalization,  reclassification, consolidation, merger,
sale,  transfer or share  exchange by a holder of the number of shares of Common
Stock  into  which  such  Series  5.375%  Debenture  might  have been  converted
immediately  prior to such  recapitalization,  reclassification,  consolidation,
merger,  sale,  transfer or share  exchange,  after,  in the case of a Non-Stock
Fundamental Change (as hereinafter defined),  giving effect to any adjustment in
the Conversion Price required by the provisions which follow in subparagraph (i)
of Section 5.04(c), and (B) in the case of a Common Stock Fundamental Change (as
hereinafter  defined),  common  stock of the kind  received by holders of Common
Stock  as a  result  of  such  Common  Stock  Fundamental  Change  in an  amount
determined  pursuant to the  provisions  which  follow in  subparagraph  (ii) of
Section 5.04(c). The company formed by such consolidation or resulting from such
merger or which acquires such assets or which acquires the Common Stock,  as the
case may be,  shall  enter  into a  supplemental  indenture  with  the  Trustee,
satisfactory  in form to the  Trustee,  the  provisions  of  which  provide  for
adjustments  which,  for  events  subsequent  to  the  effective  date  of  such
supplemental  indenture,  shall be as nearly equivalent as may be practicable to
the adjustments  provided for in this Article Five. The above  provisions  shall
similarly    apply   to    successive    recapitalization,    reclassifications,
consolidations, mergers, sales, transfers or share exchanges.

     (b)  Notwithstanding  any  other  provisions  in this  Article  Five to the
contrary,  if any Fundamental Change (as hereinafter  defined) occurs,  then the
Conversion  Price  in  effect  will  be  adjusted  immediately   following  such
Fundamental  Change as described below in Section 5.04(c).  In addition,  in the
event of a Common Stock Fundamental  Change,  each Series 5.375% Debenture shall
be  convertible  solely  into  common  stock of the kind  received by holders of
Common  Stock as the  result of such  Common  Stock  Fundamental  Change as more
specifically provided below in Section 5.04(c).

     (c) For purposes of calculating  any adjustment to be made pursuant to this
Article Five in the event of a Fundamental  Change,  immediately  following such
Fundamental  Change (and for such purposes a Fundamental  Change shall be deemed
to occur on the earlier of (a) the occurrence of such Fundamental Change and (b)
the date, if any, fixed for  determination  of shareholders  entitled to receive
the cash, securities, property or other assets distributable in such Fundamental
Change to holders of the Common Stock):

          (i) in the case of a  Non-Stock  Fundamental  Change,  the  Conversion
          Price  per  share  of  Common  Stock  shall  be the  lower  of (A) the
          Conversion  Price  in  effect  immediately  prior  to  such  Non-Stock
          Fundamental  Change,  but after giving effect to any other adjustments
          effected pursuant to this Article Five, and (B) the product of (1) the
          greater of the Applicable  Price (as hereinafter  defined) or the then
          applicable  Reference Market Price (as hereinafter  defined) and (2) a
          fraction the numerator of which shall be $100


                                       23





          and the  denominator  of which  shall be the  amount  set forth  below
          (based on the date on which such Non-Stock Fundamental Change occurs).
          For the twelve month period beginning March 31:

                      Year                              Denominator
                      ----                              -----------
                      1997                               105.375%
                      1998                               104.703%
                      1999                               104.031%
                      2000                               103.359%
                      2001                               102.687%
                      2002                               102.015%
                      2003                               101.343%
                      2004                               100.671%

          and thereafter, 100.00;

          (ii) in the case of a Common Stock Fundamental  Change, the Conversion
     Price per share of Common  Stock  shall be the  Conversion  Price in effect
     immediately prior to such Common Stock Fundamental Change, but after giving
     effect to any other  adjustments  effected  pursuant to this Article  Five,
     multiplied by a fraction,  the  numerator of which is the  Purchaser  Stock
     Price  (as  hereinafter  defined)  and  the  denominator  of  which  is the
     Applicable Price;  provided,  however,  that in the event of a Common Stock
     Fundamental  Change  in which  (A) 100% of the  value of the  consideration
     received  by a holder of Common  Stock is  common  stock of the  successor,
     acquiror or other third party (and cash,  if any,  paid with respect to any
     fractional  interests in such common stock resulting from such Common Stock
     Fundamental  Change)  and (B)  all of the  Common  Stock  shall  have  been
     exchanged  for,  converted  into or acquired for common stock (and cash, if
     any, with respect to fractional  interests) of the  successor,  acquiror or
     other  third  party,  the  Conversion  Price  per  share  of  Common  Stock
     immediately  following  such Common Stock  Fundamental  Change shall be the
     Conversion  Price  in  effect   immediately  prior  to  such  Common  Stock
     Fundamental  Change  divided by the number of shares of common stock of the
     successor, acquiror, or other third party received by a holder of one share
     of Common Stock as a result of such Common Stock Fundamental Change.

     (d) The  following  definitions  shall apply to terms used in this  Article
Five:

          (i)  "Applicable  Price"  shall  mean (A) in the event of a  Non-Stock
     Fundamental  Change in which the holders of Common Stock receive only cash,
     the amount of cash  receivable by a holder of one share of Common Stock and
     (B) in the  event of any  other  Fundamental  Change,  the  average  of the
     Closing  Prices for one share of Common  Stock  during the ten Trading Days
     immediately  prior to the


                                       24





     record date for the  determination  of the holders of Common Stock entitled
     to receive cash,  securities,  property or other assets in connection  with
     such  Fundamental  Change or, if there is no such record date, prior to the
     date upon which the holders of Common Stock shall have the right to receive
     such cash, securities, property or other assets.

          (ii) "Closing  Price" with respect to any  securities on any day shall
     mean the closing  sale price,  regular way, on such day or, in case no such
     sale takes place on such day, the average of the  reported  closing bid and
     asked prices,  regular way, in each case on the New York Stock Exchange or,
     if such security is not listed or admitted to trading on such Exchange,  on
     the principal  national  securities  exchange or quotation  system on which
     such  security is quoted or listed or admitted to trading or, if not quoted
     or listed or admitted  to trading on any  national  securities  exchange or
     quotation  system,  the average of the closing bid and asked prices of such
     security on the over-the-counter market on the date in question as reported
     by the National  Quotation Bureau  Incorporated,  or a similarly  generally
     accepted  reporting  service  or, if not so  available,  in such  manner as
     furnished by any New York Stock Exchange  member firm selected from time to
     time by the Board of  Directors  of the Company for that purpose or a price
     determined in good faith by the Board of Directors of the Company.

          (iii) "Common  Stock  Fundamental  Change" shall mean any  Fundamental
     Change in which more than 50% of the value (as  determined in good faith by
     the Board of Directors of the Company) of the consideration received by the
     holders of Common Stock pursuant to such transactions consists of shares of
     common stock that, for the ten consecutive  Trading Days immediately  prior
     to such Fundamental  Change,  has been admitted for listing or admitted for
     listing subject to notice of issuance on a national  securities exchange or
     quoted on the Nasdaq National Market; provided, however, that a Fundamental
     Change shall not be a Common Stock Fundamental Change unless either (A) the
     Company continues to exist after the occurrence of such Fundamental  Change
     and the outstanding  Preferred  Securities continue to exist as outstanding
     Preferred Securities,  or (B) the outstanding Preferred Securities continue
     to exist as Preferred  Securities and are convertible  into common stock of
     the successor to the Company.

          (iv) "Fundamental Change" shall mean the occurrence of any transaction
     or event or  series of  transactions  or  events  pursuant  to which all or
     substantially  all of the Common  Stock shall be exchanged  for,  converted
     into,  acquired  for or  constitutes  solely  the  right to  receive  cash,
     securities,  property  or other  assets  (whether  by means of an  exchange
     offer,  liquidation,  tender  offer,  consolidation,  merger,  combination,
     reclassification, recapitalization or otherwise); provided, however, in the
     case of a plan  involving  more than one such  transaction  or  event,  for
     purposes of adjustment of the Conversion  Price,  such  Fundamental  Change
     shall be deemed to have occurred when substantially all of the Common Stock
     has been  exchanged  for,  converted  into, or acquired for or  constitutes
     solely the right to


                                       25





     receive  cash,  securities,  property or other assets,  but the  adjustment
     shall be based upon the  consideration  which the  holders of Common  Stock
     received in such transaction or event as a result of which more than 50% of
     the Common Stock shall have been exchanged for, converted into, or acquired
     for or shall  constitute  solely  the right to  receive  cash,  securities,
     property or other assets.

          (v) "Non-Stock  Fundamental  Change" shall mean any Fundamental Change
     other than a Common Stock Fundamental Change.

          (vi)  "Purchaser  Stock Price" shall mean,  with respect to any Common
     Stock Fundamental  Change,  the average of the Closing Prices for one share
     of the common  stock  received  by holders of Common  Stock in such  Common
     Stock  Fundamental  Change during the ten Trading Days immediately prior to
     the  record  date for the  determination  of the  holders  of Common  Stock
     entitled to receive  such common stock or, if there is no such record date,
     prior to the date upon  which the  holders of Common  Stock  shall have the
     right to receive such common stock.

          (vii)  "Reference  Market Price" shall initially mean $39.08 (which is
     an amount equal to 66-2/3% of the last  reported  sale price for the Common
     Stock on the New York Stock  Exchange on March 24,  1997) and, in the event
     of any  adjustment  to the  Conversion  Price  other  than as a result of a
     Fundamental  Change,  the Reference  Market Price shall also be adjusted so
     that the ratio of the Reference  Market Price to the Conversion Price after
     giving effect to any such adjustment  shall always be the same as the ratio
     of the initial  Reference Market Price to the initial  Conversion Price set
     forth in this Article Five.

     (e) In  determining  the amount  and type of  consideration  received  by a
holder  of  Common  Stock in the event of a  Fundamental  Change,  consideration
received by a holder of Common Stock pursuant to a statutory  right of appraisal
will be disregarded.

     SECTION 5.05. In case:

          (i) the Company shall  declare a dividend (or any other  distribution)
     on Common Stock that would cause an adjustment to the  Conversion  Price of
     the  Series  5.375%  Debentures  pursuant  to  the  terms  of  any  of  the
     subparagraphs  above (including such an adjustment that would occur but for
     the terms of the first sentence of Section 5.03(a)(viii) above); or

          (ii) the outstanding shares of Common Stock shall be subdivided into a
     greater  number of shares of Common Stock or combined into a smaller number
     of shares of Common Stock; or

          (iii) the  Company  shall  authorize  the  granting  to the holders of
     Common Stock  generally of rights or warrants (for a period expiring within
     45 days after the record date fixed for a  distribution  of such rights and
     warrants) to subscribe for or


                                       26





     purchase any shares of the  Company's  capital stock or other capital stock
     of any class or of any other rights (including any Rights Offerings); or

          (iv) of any reclassification of Common Stock (other than a subdivision
     or  combination  of the  outstanding  shares  of Common  Stock),  or of any
     consolidation, merger or share exchange to which the Company is a party and
     for which approval of any  shareholders  of the Company is required,  or of
     the sale or  transfer  of all or  substantially  all of the  assets  of the
     Company or a compulsory share exchange; or

          (v)  of the  voluntary  or  involuntary  dissolution,  liquidation  or
     winding-up of the Company;

then the Company shall (i) if any Preferred Securities are outstanding, cause to
be filed with the transfer agent for the Preferred  Securities,  and shall cause
to be mailed to the holders of record of the Preferred Securities, at their last
addresses  as they shall  appear upon the stock  transfer  books of the Trust or
(ii) shall  cause to be mailed to all  Holders at their last  addresses  as they
shall  appear in the books and  records of the Trust,  at least 15 days prior to
the applicable record or effective date hereinafter  specified, a notice stating
(A) the date on which a record  (if any) is to be taken for the  purpose of such
dividend,  distribution,  rights or warrants or, if a record is not to be taken,
the date as of which the  holders of Common  Stock of record to be  entitled  to
such dividend, distribution,  rights or warrants are to be determined or (B) the
date on which such  reclassification,  consolidation,  merger,  sale,  transfer,
share  exchange,  dissolution,  liquidation  or winding up is expected to become
effective,  and the date as of which it is expected that holders of Common Stock
of record  shall be  entitled  to  exchange  their  shares  of Common  Stock for
securities,  cash or other  property  deliverable  upon  such  reclassification,
consolidation,  merger, sale, transfer, share exchange, dissolution, liquidation
or winding up (but no  failure to mail such  notice or any defect  therein or in
the mailing  thereof shall affect the validity of the corporate  action required
to be specified in such notice).

     SECTION 5.06. The Company shall reserve,  free from pre-emptive rights, out
of its  authorized  but unissued  shares,  sufficient  shares to provide for the
conversion  of the Series  5.375%  Debentures  from time to time as such  Series
5.375% Debentures are presented for conversion, provided, that nothing contained
herein  shall  be  construed  to  preclude  the  Company  from   satisfying  its
obligations in respect of the conversion of Series 5.375% Debentures by delivery
of  repurchased  shares of Common  Stock  which are held in the  treasury of the
Company.

     If any shares of Common Stock to be reserved for the purpose of  conversion
of Series 5.375% Debentures  hereunder require  registration with or approval of
any governmental authority under any Federal or State law before such shares may
be validly issued or delivered upon conversion,  then the Company covenants that
it will in good faith and as expeditiously  as possible  endeavor to secure such
registration or approval, as the case may be, provided, however, that nothing in
this  Section 5.06 shall be deemed to affect


                                       27





in any way the  obligations of the Company to convert  Series 5.375%  Debentures
into Common Stock as provided in this Article Five.

     Before  taking any action  which would  cause an  adjustment  reducing  the
Conversion  Price  below the then par value,  if any, of the Common  Stock,  the
Company will take all corporate action which may, in the Opinion of Counsel,  be
necessary in order that the Company may validly and legally issue fully paid and
non-assessable shares of Common Stock at such adjusted Conversion Price.

     The Company  covenants  that all shares of Common Stock which may be issued
upon  conversion of Series 5.375%  Debentures  will upon issue be fully paid and
non-assessable by the Company and free of pre-emptive rights.

     SECTION 5.07. Notwithstanding the foregoing provisions, the issuance of any
shares of Common Stock  pursuant to any plan providing for the  reinvestment  of
dividends or interest payable on securities of the Company and the investment of
additional  optional  amounts in shares of Common Stock under any such plan, and
the issuance of any shares of Common Stock or options or rights to purchase such
shares  pursuant  to any  employee  benefit  plan or program  of the  Company or
pursuant  to  any  option,  warrant,  right  or  exercisable,   exchangeable  or
convertible  security  outstanding as of March 31, 1997,  shall not be deemed to
constitute  an  issuance  of  Common  Stock  or  exercisable,   exchangeable  or
convertible  securities by the Company to which any of the adjustment provisions
described  above  applies.  There shall also be no adjustment of the  Conversion
Price in case of the issuance of any stock (or  securities  convertible  into or
exchangeable for stock) of the Company except as specifically  described in this
Article Five.

     SECTION 5.08. In case the Company shall, by dividend or otherwise,  declare
or make a distribution on the Common Stock referred to in Section 5.03(a)(iv) or
5.03(a)(v) (including,  without limitation,  dividends or distributions referred
to in the last sentence of Section 5.03(a)(vi)), the Holder of the Series 5.375%
Debentures,  upon the conversion  thereof subsequent to the close of business on
the date fixed for the  determination  of stockholders  entitled to receive such
distribution  and prior to the  effectiveness of the Conversion Price adjustment
in respect of such  distribution,  shall also be  entitled  to receive  for each
share of Common Stock into which the Series 5.375% Debentures are converted, the
portion  of  the  shares  of  Common  Stock,  rights,  warrants,   evidences  of
indebtedness, shares of capital stock, cash and assets so distributed applicable
to one share of Common Stock;  provided,  however,  that, at the election of the
Company  (whose  election  shall be evidenced  by a  resolution  of the Board of
Directors)  with respect to all Holders so converting,  the Company may, in lieu
of distributing to such Holder any portion of such  distribution  not consisting
of cash or securities of the Company, pay such Holder an amount in cash equal to
the fair  market  value  thereof  (as  determined  in good faith by the Board of
Directors, whose determination shall be conclusive and described in a resolution
of the  Board of  Directors).  If any  conversion  of Series  5.375%  Debentures
described in the immediately preceding sentence occurs prior to the payment date
for a distribution  to holders of Common Stock which the Holder of Series 5.375%
Debentures


                                       28





so converted is entitled to receive in accordance with the immediately preceding
sentence,  the Company may elect (such  election to be evidenced by a resolution
of the  Board of  Directors)  to  distribute  to such  Holder a due bill for the
shares of Common Stock, rights, warrants,  evidences of indebtedness,  shares of
capital  stock,  cash or assets to which such Holder is so  entitled,  provided,
that  such due bill (a)  meets  any  applicable  requirements  of the  principal
national  securities  exchange or other market on which the Common Stock is then
traded and (b)  requires  payment or delivery  of such  shares of Common  Stock,
rights,  warrants,  evidences of indebtedness,  shares of capital stock, cash or
assets no later  than the date of  payment  or  delivery  thereof  to holders of
shares of Common Stock receiving such distribution.


                                   ARTICLE SIX
                        FORM OF SERIES 5.375% DEBENTURES

     SECTION 6.01. The Series 5.375% Debentures and the Trustee's Certificate of
Authentication  to be endorsed  thereon are to be substantially in the following
forms:

                           (FORM OF FACE OF DEBENTURE)

     [IF THE NOTE IS TO BE A GLOBAL  DEBENTURE,  INSERT  - This  Debenture  is a
Global Debenture within the meaning of the Indenture hereinafter referred to and
is registered  in the name of a Depositary  or a nominee of a  Depositary.  This
Debenture is  exchangeable  for  Debentures  registered  in the name of a person
other than the  Depositary  or its  nominee  only in the  limited  circumstances
described  in the  Indenture,  and no transfer of this  Debenture  (other than a
transfer  of this  Debenture  as a whole by the  Depositary  to a nominee of the
Depositary  or by a nominee  of the  Depositary  to the  Depositary  or  another
nominee of the Depositary) may be registered except in limited circumstances.

     Unless this Debenture is presented by an authorized  representative  to The
Depository Trust Company (55 Water Street,  New York, New York) to the issuer or
its agent for registration of transfer,  exchange or payment,  and any Debenture
issued is  registered  in the name of Cede & Co. or such other name as requested
by an authorized  representative of The Depository Trust Company and any payment
hereon is made to Cede & Co., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY A PERSON IS WRONGFUL since the registered  owner hereof,  Cede &
Co., has an interest herein.]


                                       29





No.                                                                    $

CUSIP NO.  ____________

                               THE AES CORPORATION

                       ____% JUNIOR SUBORDINATED DEBENTURE
                                    DUE 2027

     The AES  Corporation,  a corporation  duly organized and existing under the
laws of the State of Delaware (herein  referred to as the "Company",  which term
includes any successor corporation under the Indenture hereinafter referred to),
for value  received,  hereby  promises to pay to , or  registered  assigns,  the
principal  sum of _________  Dollars on March 31,  2027,  and to pay interest on
said principal sum from March 31, 1997 or from the most recent interest  payment
date (each such date,  an "Interest  Payment  Date") to which  interest has been
paid or duly provided for,  quarterly  (subject to deferral as set forth herein)
in  arrears  commencing  March  31,  1997 at the rate of 5.375%  per annum  plus
Compounded  Interest,  if any, until the principal  hereof shall have become due
and payable,  and on any overdue  principal  and  premium,  if any, and (without
duplication and to the extent that payment of such interest is enforceable under
applicable  law) on any  overdue  installment  of  interest at the same rate per
annum.  The amount of interest  payable on any  Interest  Payment  Date shall be
computed on the basis of a 360-day year twelve 30-day months.  In the event that
any date on which  interest is payable on this  Debenture is not a business day,
then  payment  of  interest  payable  on such  date  will  be  made on the  next
succeeding  day which is a  business  day (and  without  any  interest  or other
payment in respect of any such delay),  except that,  if such business day is in
the next succeeding calendar year, such payment shall be made on the immediately
preceding  business  day, in each case with the same force and effect as if made
on such date. The interest  installment so payable,  and punctually paid or duly
provided for, on any Interest  Payment Date will, as provided in the  Indenture,
be paid to the person in whose name this  Debenture (or one or more  Predecessor
Debentures, as defined in said Indenture) is registered at the close of business
on the regular  record date for such interest  installment,  [which shall be the
close of business on the day next preceding such Interest Payment Date, provided
if the  Preferred  Securities  of AES Trust I are no longer in  book-entry  only
form,  the regular  record dates shall be the close of business on the fifteenth
(15th) day of the month in which such Interest Payment Date occurs] [IF PURSUANT
TO THE  PROVISIONS  OF  SECTION  2.11(c)  OF THE  INDENTURE  THE  Series  5.375%
DEBENTURES ARE NOT REPRESENTED BY A GLOBAL DEBENTURE -- which shall be the close
of  business  on the  fifteenth  (15th) day of the month in which such  Interest
Payment Date occurs.] Any such interest  installment not punctually paid or duly
provided for shall  forthwith  cease to be payable to the registered  holders on
such  regular  record  date,  and may be paid to the  person in whose  name this
Debenture (or one or more Predecessor  Debentures) is registered at the close of
business on a special  record date to be fixed by the Trustee for the payment of
such defaulted interest, notice whereof shall be given to the registered holders
of this series of Debentures  not less than 10 days prior to


                                       30





such special  record date, or may be paid at any time in any other lawful manner
not inconsistent  with the requirements of any securities  exchange on which the
Debentures  may be  listed,  and upon  such  notice as may be  required  by such
exchange,  all as more fully  provided in the  Indenture.  The principal of (and
premium,  if any) and the  interest  on this  Debenture  shall be payable at the
office or agency of the Company  maintained  for that  purpose in the Borough of
Manhattan, The City and State of New York, in any coin or currency of the United
States of America  which at the time of payment is legal  tender for  payment of
public and private  debts;  provided,  however,  that payment of interest may be
made at the option of the Company by check  mailed to the  registered  holder at
such address as shall appear in the  Debenture  register and that the payment of
principal will only be made upon the surrender of this Debenture to the Trustee.
Notwithstanding  the  foregoing,  so long as the owner and record holder of this
Debenture is the Property  Trustee (as defined in the  Indenture  referred to on
the reverse hereof),  the payment of the principal of (and premium,  if any) and
interest (including  Compounded Interest, if any) on this Debenture will be made
at such place and to such account of the Property  Trustee as may be  designated
by the Property Trustee.

     The indebtedness  evidenced by this Debenture is, to the extent provided in
the Indenture,  subordinate and subject in right of payment to the prior payment
in full of all  Senior  and  Subordinated  Debt,  and this  Debenture  is issued
subject to the provisions of the Indenture with respect thereto.  Each Holder of
this Debenture,  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  acknowledge  or  effectuate  the
subordination so provided and (c) appoints the Trustee his  attorney-in-fact for
any and all such purposes.  Each Holder hereof, by his acceptance hereof, hereby
waives all notice of the acceptance of the  subordination  provisions  contained
herein and in the  Indenture  by each  holder of Senior and  Subordinated  Debt,
whether now outstanding or hereafter incurred,  and waives reliance by each such
Holder upon said provisions.

     This  Debenture  shall not be entitled to any benefit  under the  Indenture
hereinafter referred to, be valid or become obligatory for any purpose until the
Certificate of  Authentication  hereon shall have been signed by or on behalf of
the Trustee.

     The  provisions of this  Debenture are continued on the reverse side hereof
and such  continued  provisions  shall for all purposes  have the same effect as
though fully set forth at this place.

                                       31






     IN WITNESS WHEREOF, the Company has caused this Instrument to be executed.

Dated:

                                       The AES Corporation

                                       By
                                         -----------------------------------

Attest:

By
  -----------------------------------
      Secretary












                          CERTIFICATE OF AUTHENTICATION

         This is one of the Debentures of the series of Debentures  described in
the within-mentioned Indenture.

The First Bank of Chicago                       --------------------------------
as Trustee                             or       as Authentication Agent

By                                              By
  -----------------------------------             ------------------------------
    Authorized Signatory                          Authorized Signatory










                         (FORM OF REVERSE OF DEBENTURE)

     This  Debenture is one of a duly  authorized  series of  Debentures  of the
Company (herein  sometimes  referred to as the  "Debentures"),  specified in the
Indenture,  all issued or to be issued in one or more series  under and pursuant
to an Indenture  dated as of March 1, 1997 duly executed and  delivered  between
the  Company  and  The  First  National  Bank of  Chicago,  a  national  banking
association,  as Trustee (herein referred to as the "Trustee"),  as supplemented
by the First  Supplemental  Indenture  dated as of March 31,  1997  between  the
Company and the Trustee (said  Indenture as so  supplemented  being  hereinafter
referred  to  as  the  "Indenture"),  to  which  Indenture  and  all  indentures
supplemental  thereto  reference is hereby made for a description of the rights,
limitations  of rights,  obligations,  duties and  immunities  thereunder of the
Trustee,  the  Company  and the  holders of the  Debentures,  and, to the extent
specifically set forth in the Indenture,  the holders of Senior and Subordinated
Debt and Preferred Securities. By the terms of the Indenture, the Debentures are
issuable  in  series  which may vary as to  amount,  date of  maturity,  rate of
interest  and in other  respects as in the  Indenture  provided.  This series of
Debentures is designated the 5.375% Junior Subordinated  Debentures due 2027 and
is limited in aggregate principal amount as specified in said First Supplemental
Indenture.

     Except  as  provided  in the  next  paragraph,  the  Debentures  may not be
redeemed  by the Company  prior to March 31,  2000.  The Company  shall have the
right to redeem this Debenture at the option of the Company,  without premium or
penalty,  in  whole  or in part at any  time on or  after  March  31,  2000  (an
"Optional  Redemption"),  upon not less than 30 nor move than 60 days  notice to
the  Holder  of the  Series  5.375%  Debentures,  at the  following  prices  (as
expressed  as  percentages  of the  principal  amount  of the  Debentures)  (the
"Optional  Redemption  Price"),  together with any accrued but unpaid  interest,
including any Compounded Interest,  if any, to, but including,  the date of such
redemption, if redeemed during the 12-month period beginning March 31:

                   Year                              Redemption Price
                   ----                              ----------------
                   2000                                  103.359%
                   2001                                  102.688%
                   2002                                  102.016%
                   2003                                  101.344%
                   2004                                  100.672%

and 100% if redeemed on or after March 31, 2005.

     If the Series 5.375%  Debentures are redeemed on any Interest Payment Date,
accrued  and  unpaid  interest  shall be  payable  to  Holders  of record on the
relevant record date.

     The Company may not redeem any Series 5.375%  Debentures unless all accrued
and unpaid interest thereon,  including  Compounded  Interest,  if any, has been
paid for all quarterly periods  terminating on or prior to the date of notice of
redemption.  So long as


                                       34





the  corresponding  Trust  Securities  are  outstanding,  the proceeds  from the
redemption  of the  Series  5.375%  Debentures  will be used to redeem the Trust
Securities.

     If the Debentures are only partially redeemed by the Company pursuant to an
Optional  Redemption,  the Debentures  will be redeemed pro rata or by lot or by
any  other  method  utilized  by  the  Trustee;  provided  if,  at the  time  of
redemption,  the Debentures are registered as a Global Debenture, the Depository
shall  determine the principal  amount of such Debentures held by each holder of
Debentures to be redeemed in accordance with its customary procedures.

     If,  at any  time,  a Tax  Event  (as  defined  below)  shall  occur  or be
continuing after receipt of a Dissolution Tax Opinion (as defined below) and (i)
the  Regular  Trustees  and the  Company  shall  have  received  an  opinion  (a
"Redemption  Tax Opinion") of a nationally  recognized  independent  tax counsel
experienced in such matters that, as a result of a Tax Event, there is more than
an  insubstantial  risk that the Company would be precluded  from  deducting the
interest on the Series 5.375%  Debentures  for United States  federal income tax
purposes even if the Series 5.375% Debentures were distributed to the holders of
Preferred  Securities  and Common  Securities  in  liquidation  of such holder's
interest  in AES  Trust I as set forth in the  Declaration  of Trust or (ii) the
Regular  Trustees  shall  have  been  informed  by such  tax  counsel  that a No
Recognition  Opinion (as defined  below) cannot be delivered to AES Trust I, the
Company shall have the right at any time, upon not less than 30 nor more than 60
days'  notice,  to redeem the Series  5.375%  Debentures in whole or in part for
cash at a price equal to 100% of the principal amount thereof, together with any
accrued and unpaid interest thereon,  including  Compounded Interest if any, to,
but excluding the date of redemption, within 90 days following the occurrence of
such Tax Event;  provided,  however,  that, if at the time there is available to
the Company or the Regular  Trustees on behalf of AES Trust I the opportunity to
eliminate,  within such 90 day period,  the Tax Event by taking some ministerial
action ("Ministerial  Action"),  such as filing a form or making an election, or
pursuing some other similar reasonable  measure,  which has no adverse effect on
AES Trust I, the Company or the holders of the Preferred Securities, the Company
or the Regular  Trustees  on behalf of AES Trust I will  pursue such  measure in
lieu of redemption and provided  further that the Company shall have no right to
redeem the Series 5.375%  Debentures while the Regular Trustees on behalf of AES
Trust I are pursuing any such Ministerial Action.

     "Tax Event"  means that the Company  and the  Regular  Trustees  shall have
obtained an opinion of nationally recognized independent tax counsel experienced
in such  matters (a  "Dissolution  Tax  Opinion") to the effect that on or after
March 24, 1997,  as a result of (a) any amendment to, or change in, the laws (or
any regulations thereunder) of the United States or any political subdivision or
taxing  authority  thereof or therein,  (b) any  amendment  to, or change in, an
interpretation or application of any such laws or regulations by any legislative
body,  court,   governmental  agency  or  regulatory  authority  (including  the
enactment of any  legislation  and the  publication of any judicial  decision or
regulatory determination), (c) any interpretation or pronouncement that provides
for a position  with respect to such laws or  regulations  that differs from the
theretofore  generally 


                                       35





accepted  position  or (d)  any  action  taken  by any  governmental  agency  or
regulatory authority, which amendment or change is enacted, promulgated,  issued
or effective or which  interpretation or pronouncement is issued or announced or
which action is taken,  in each case on or after March 24,  1997,  there is more
than an insubstantial risk that (i) AES Trust I is, or will be within 90 days of
the date thereof,  subject to United States  federal  income tax with respect to
income accrued or received on the Series 5.375% Debentures, (ii) AES Trust I is,
or will be within 90 days of the date thereof, subject to more than a de minimis
amount of taxes, duties or other governmental  charges or (iii) interest payable
by the Company to AES Trust I on the Series 5.375%  Debentures is not, or within
90 days of the date  thereof will not be,  deductible  by the Company for United
States federal income tax purposes.

     "No  Recognition  Opinion"  means an  opinion  of a  nationally  recognized
independent tax counsel  experienced in such matters,  which opinion may rely on
any then applicable published revenue ruling of the Internal Revenue Service, to
the effect that the holders of the Preferred  Securities  will not recognize any
gain or loss for United  States  federal  income tax  purposes  as a result of a
dissolution of AES Trust I and  distribution of the Series 5.375%  Debentures as
provided in the Declaration of Trust.

     If the Debentures are only partially redeemed by the Company pursuant to an
Optional  Redemption  or as a result  of a Tax  Event as  described  above,  the
Debentures will be redeemed pro rata or by lot or in some other equitable manner
determined  by  the  Trustee.   Notwithstanding  the  foregoing,  if  a  partial
redemption of the Series 5.375%  Debentures would result in the delisting of the
Preferred  Securities by any national  securities exchange or other organization
on which the  Preferred  Securities  are then listed,  the Company  shall not be
permitted  to effect  such  partial  redemption  and will only redeem the Series
5.375% Debentures in whole.

     In the event of redemption of this  Debenture in part only, a new Debenture
or Debentures of this series for unredeemed portion hereof will be issued in the
name of the Holder hereof upon the cancellation hereof.

     In case an Event of  Default,  as  defined  in the  Indenture,  shall  have
occurred  and be  continuing,  the  principal  of all of the  Debentures  may be
declared,  and upon such  declaration  shall  become,  due and  payable,  in the
manner, with the effect and subject to the conditions provided in the Indenture.

     The Indenture contains  provisions for defeasance at any time of the entire
indebtedness  of this  Debenture  upon  compliance  by the Company  with certain
conditions set forth therein.

     The Indenture contains  provisions  permitting the Company and the Trustee,
with the  consent  of the  Holders  of not less  than a  majority  in  aggregate
principal  amount  of the  Debentures  of  each  series  affected  at  the  time
outstanding,  as defined  in the  Indenture  (and,  in the case of any series of
Debentures  held as trust  assets of an AES Trust  and with


                                       36





respect to which a Security Exchange has not theretofore occurred,  such consent
of holders of the  Preferred  Securities  and the Common  Securities of such AES
Trust) as may be required  under the  Declaration  of Trust of such AES Trust to
execute  supplemental  indentures for the purpose of adding any provisions to or
changing in any manner or eliminating  any of the provisions of the Indenture or
of any  supplemental  indenture  or of modifying in any manner the rights of the
Holders  of  the  Debentures;  provided,  however,  that  no  such  supplemental
indenture  shall (i) extend the fixed  maturity of any Debentures of any series,
or reduce the principal amount thereof, or reduce the rate or extend the time of
payment of interest  thereon,  or reduce any premium payable upon the redemption
thereof, without the consent of the holder of each Debenture so affected or (ii)
reduce the aforesaid percentage of Debentures, the holders of which are required
to  consent  to any such  supplemental  indenture,  without  the  consent of the
holders of each Debenture  (and, in the case of any series of Debentures held as
trust assets of an AES Trust and with  respect to which a Security  Exchange has
not  theretofore  occurred,  such  consent  of  the  holders  of  the  Preferred
Securities and the Common  Securities of such AES Trust as may be required under
the  Declaration  of Trust of such AES  Trust)  then  outstanding  and  affected
thereby.  The Indenture  also contains  provisions  permitting  the Holders of a
majority in aggregate principal amount of the Debentures of a series at the time
outstanding  affected thereby (subject,  in the case of any series of Debentures
held as trust  assets  of an AES Trust and with  respect  to which a  Securities
Exchange has not theretofore  occurred,  to such consent of holders of Preferred
Securities and Common  Securities of such AES Trust as may be required under the
Declaration  of  Trust of such AES  Trust),  on  behalf  of the  Holders  of the
Debentures of such series,  to waive any past default in the  performance of any
of the covenants  contained in the  Indenture,  or  established  pursuant to the
Indenture with respect to such series, and its consequences, except a default in
the payment of the  principal  of or premium,  if any, or interest on any of the
Debentures of such series.  Any such consent or waiver by the registered  Holder
of this  Debenture  (unless  revoked  as  provided  in the  Indenture)  shall be
conclusive  and binding upon such Holder and upon all future  Holders and owners
of this  Debenture and of any Debenture  issued in exchange  herefor or in place
hereof  (whether by  registration  of transfer or  otherwise),  irrespective  of
whether  or not any  notation  of such  consent  or  waiver  is made  upon  this
Debenture.

     Subject to  Section  13.12 of the  Indenture,  no  reference  herein to the
Indenture (other than such Section) and no provision of this Debenture or of the
Indenture shall alter or impair the obligation of the Company, which is absolute
and unconditional,  to pay the principal of and premium, if any, and interest on
this  Debenture  at the time and  place  at the  rate  and in the  money  herein
prescribed.

     So long as the  Company is not in default in the payment of interest on the
Debentures, the Company shall have the right, at any time during the term of the
Debentures,  from time to time to extend  the  interest  payment  period of such
Debentures for up to 20 consecutive  quarterly  interest  periods (the "Extended
Interest Payment Period"),  at the end of which period the Company shall pay all
interest then accrued and unpaid  (together with interest thereon at the rate of
5.375% per annum to the extent permitted by applicable law, compounded quarterly
("Compounded Interest"));  provided


                                       37





that no Extended  Interest Payment Period may extend beyond the date of maturity
or any redemption date of the Debentures.  During such Extended Interest Payment
Period  the  Company  shall not  declare  or pay any  dividend  on,  or  redeem,
purchase, acquire or make a distribution or liquidation payment with respect to,
any of its common stock or preferred stock, or make any guarantee  payments with
respect  thereto,  provided  that  the  foregoing  will not  apply to any  stock
dividends,  paid by the Company in Common Stock. Prior to the termination of any
such Extended Interest Payment Period, the Company may pay all or any portion of
the interest  accrued on the Debentures on any Interest  Payment Date to holders
of record on the regular record date for such Interest Payment Date or from time
to time further extend such Extended Interest Payment Period, provided that such
Period  together  with all such further  extensions  thereof shall not exceed 20
consecutive  quarterly interest periods. At the termination of any such Extended
Interest  Payment Period and upon the payment of all accrued and unpaid interest
then due,  together  with  Compounded  Interest,  the  Company  may select a new
Extended  Interest  Payment Period,  subject to the foregoing  requirements.  No
interest on this Debenture shall be due and payable during an Extended  Interest
Payment Period,  except at the end thereof.  At the end of the Extended Interest
Payment  Period the  Company  shall pay all  interest  accrued and unpaid on the
Series  5.375%  Debentures  including  any  Compounded  Interest  which shall be
payable to the holders of the Series 5.375% Debentures in whose names the Series
5.375%  Debentures are registered in the Debenture  register on the first record
date after the end of the Extended Interest Payment Period.

     As provided in the Indenture and subject to certain limitations therein set
forth,  this Debenture is  transferable  by the registered  holder hereof on the
Debenture  register  of the  Company,  upon  surrender  of  this  Debenture  for
registration  of  transfer at the office or agency of the Company in the Borough
of Manhattan, The City and State of New York accompanied by a written instrument
or  instruments of transfer in form  satisfactory  to the Company or the Trustee
duly executed by the registered holder hereof or his attorney duly authorized in
writing,  and thereupon one or more new  Debentures of authorized  denominations
and for the same  aggregate  principal  amount and series  will be issued to the
designated  transferee or  transferees.  No service  charge will be made for any
such transfer,  but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in relation thereto.

     Prior to due  presentment  for  registration of transfer of this Debenture,
the Company,  the Trustee, any paying agent and any Debenture Registrar may deem
and treat the registered  holder hereof as the absolute owner hereof (whether or
not this Debenture shall be overdue and  notwithstanding any notice of ownership
or writing  hereon made by anyone other than the  Debenture  Registrar)  for the
purpose  of  receiving  payment of or on  account  of the  principal  hereof and
premium, if any, and interest due hereon and for all other purposes, and neither
the Company nor the Trustee  nor any paying  agent nor any  Debenture  Registrar
shall be affected by any notice to the contrary.

     No  recourse  shall  be had  for the  payment  of the  principal  of or the
interest on this  Debenture,  or for any claim based  hereon,  or  otherwise  in
respect  hereof,  or  based  on or in


                                       38





respect of the  Indenture,  against any  incorporator,  stockholder,  officer or
director, past, present or future, as such, of the Company or of any predecessor
or successor corporation, whether by virtue of any constitution, statute or rule
of law, or by the  enforcement  of any  assessment or penalty or otherwise,  all
such liability being, by the acceptance  hereof and as part of the consideration
for the issuance hereof, expressly waived and released.

     The Holder of any Debenture has the right,  exercisable at any time through
the close of  business  (New York time) on March 31,  2027 (or, in the case of a
Debenture called for redemption,  prior to the close of business on the Business
Day prior to the corresponding redemption date), to convert the principal amount
thereof (or any portion thereof that is an integral multiple of $50) into shares
of Common Stock at the initial  conversion rate of 0.6906 shares of Common Stock
for each  Debenture  (equivalent  to a  Conversion  Price of $72.40 per share of
Common Stock), subject to adjustment under certain circumstances.

     To convert a  Debenture,  a Holder must (a)  complete and sign a conversion
notice substantially in the form attached hereto, (b) surrender the Debenture to
a Conversion Agent, (c) furnish  appropriate  endorsements or transfer documents
if required by the Conversion  Agent and (d) pay any transfer or similar tax, if
required.  If a  Debenture  is  surrendered  for  conversion  after the close of
business on any regular record date for payment of a Distribution and before the
opening of  business  on the  corresponding  Distribution  payment  date,  then,
notwithstanding  such conversion,  the Distribution payable on such Distribution
payment  date will be paid in cash to the person in whose name the  Debenture is
registered  at the close of  business  on such  record  date,  and (other than a
Debenture or a portion of a Debenture called for redemption on a redemption date
occurring  after such record date and on or prior to such  Distribution  payment
date) when so surrendered for  conversion,  the Debenture must be accompanied by
payment of an amount  equal to the  Distribution  payable  on such  Distribution
payment date.  The number of shares  issuable upon  conversion of a Debenture is
determined  by dividing the principal  amount of the Debenture  converted by the
Conversion Price in effect on the Conversion Date. No fractional  shares will be
issued upon  conversion  but a cash  adjustment  will be made for any fractional
interest.  The outstanding principal amount of any Debenture shall be reduced by
the portion of the  principal  amount  thereof  converted  into shares of Common
Stock.

     [If  certificated  Debentures -- The Debentures of this series are issuable
only in registered form without coupons in denominations of $50 and any integral
multiple thereto.] [If Global Debenture -- This Global Debenture is exchangeable
for Debentures in definitive form under certain limited  circumstances set forth
in the  Indenture.  Debentures  of this  series so issued are  issuable  only in
registered form without coupons in denominations of $50 or any integral multiple
thereof.] As provided in the  Indenture and subject to certain  limitations  [If
Global Debenture -- herein and] therein set forth, Debentures of this series [If
Global Debenture -- so issued] are  exchangeable for a like aggregate  principal
amount of Debentures of this series of a different authorized  denomination,  as
requested by the Holder surrendering the same.


                                       39





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





                                       40





                          [FORM OF ELECTION TO CONVERT]

                               ELECTION TO CONVERT

To: The AES Corporation

     The undersigned  owner of this  Convertible  Debenture  hereby  irrevocably
exercises the option to convert this Debenture, or the portion below designated,
into Common Stock of THE AES  CORPORATION,  in accordance  with the terms of the
Indenture  referred to in this  Debenture,  and directs that the shares issuable
and  deliverable  upon  conversion,  together  with  any  check in  payment  for
fractional  shares,  be issued in the name of and delivered to the  undersigned,
unless a different name has been indicated in the  assignment  below.  If shares
are to be  issued  in the  name of a person  other  than  the  undersigned,  the
undersigned will pay all transfer taxes payable with respect thereto.

Date: ________, ____

    in whole              Portions of Debenture to be converted ($50 or integral
                          multiples thereof):
                          $

                      -------------------------------
                      Signature (for conversion only)

                       Please Print or Typewrite Name and Address, Including Zip
                       Code, and Social Security or Other Identifying Number

                      -------------------------------
                      -------------------------------
                      -------------------------------
                          Signature Guarantee:*_______

- --------
*    Signature must be guaranteed by an "eligible guarantor institution" that is
     a bank,  stockbroker,  savings and loan association or credit union meeting
     the  requirements  of the  Conversion  Agent,  which  requirements  include
     membership of  participation  in the Securities  Transfer Agents  Medallion
     Program  ("STAMP") or such other  "signature  guarantee  program" as may be
     determined by the Conversion Agent in addition to, or in substitution  for,
     STAMP,  all in accordance  with the Securities and Exchange Act of 1934, as
     amended.


                                       41





                                   ASSIGNMENT

FOR VALUE RECEIVED, the undersigned assigns and transfers this Debenture to:

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

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

- --------------------------------------------------------------------------------
        (Insert assignee's social security or tax identification number)

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

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

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

- --------------------------------------------------------------------------------
                    (Insert address and zip code of assignee)

and irrevocably appoints _________________  ____________________________________
________________________________________________________________________________
___________________________________________________   agent  to  transfer   this
Debenture on the books of the Trust. The agent may substitute another to act for
him or her.

Date:_______________________________________

Signature:__________________________________
         (Sign exactly as your name appears on the other side of this Debenture)

Signature Guarantee*:_________________________________________________

- --------
*    Signature must be guaranteed by an "eligible guarantor institution" that is
     a bank,  stockbroker,  savings and loan association or credit union meeting
     the  requirements  of the  Conversion  Agent,  which  requirements  include
     membership of  participation  in the Securities  Transfer Agents  Medallion
     Program  ("STAMP") or such other  "signature  guarantee  program" as may be
     determined by the Conversion Agent in addition to, or in substitution  for,
     STAMP,  all in accordance  with the Securities and Exchange Act of 1934, as
     amended.


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                                  ARTICLE SEVEN
                   ORIGINAL ISSUE OF SERIES 5.375% DEBENTURES

     SECTION  7.01.  Except as provided in Section 1.01 and this  Section  7.01,
Series 5.375% Debentures in the aggregate principal amount equal to $257,732,000
may, upon  execution of this First  Supplemental  Indenture,  be executed by the
Company and delivered to the Trustee for  authentication,  and the Trustee shall
thereupon  authenticate  and make  available for delivery said  Debentures to or
upon the written order of the Company, signed by its Chairman, its President, or
any Vice  President  and its  Treasurer or an Assistant  Treasurer,  without any
further  action by the Company.  Upon exercise of the  overallotment  option set
forth in the Underwriting Agreement,  additional Series 5.375% Debentures in the
aggregate  principal  amount of up to $25,773,200 may be executed by the Company
and delivered to the Trustee for authentication, and the Trustee shall thereupon
authenticate  and make  available  for delivery  said Series  5.375%  Debentures
executed  as  aforesaid  by the  Company,  to or upon the  written  order of the
Company,  which  order shall be  accompanied  by  evidence  satisfactory  to the
Trustee that the overallotment option has been exercised.


                                  ARTICLE EIGHT
                            MISCELLANEOUS PROVISIONS

     SECTION  8.01.  Except  as  otherwise  expressly  provided  in  this  First
Supplemental  Indenture or in the form of Series  5.375%  Debenture or otherwise
clearly  required by the context hereof or thereof,  all terms used herein or in
said form of Series 5.375%  Debenture  that are defined in the  Indenture  shall
have the several meanings respectively assigned to them thereby.

     SECTION 8.02. The Indenture,  as  supplemented  by this First  Supplemental
Indenture,  is in all respects ratified and confirmed.  This First  Supplemental
Indenture  shall be deemed part of the Indenture in the manner and to the extent
herein and therein provided.

     SECTION 8.03. The recitals herein contained are made by the Company and not
by the Trustee,  and the Trustee assumes no  responsibility  for the correctness
thereof.  The Trustee makes no  representation as to the validity or sufficiency
of this First Supplemental Indenture.

     SECTION  8.04.  This First  Supplemental  Indenture  may be executed in any
number of counterparts each of which shall be an original; but such counterparts
shall together constitute but one and the same instrument.


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     IN WITNESS WHEREOF,  the parties hereto have caused this First Supplemental
Indenture  to be duly  executed,  and  their  respective  corporate  seals to be
hereunto  affixed  and  attested,   on  the  date  or  dates  indicated  in  the
acknowledgments and as of the day and year first above written.

                    THE AES CORPORATION

                    By /s/ BARRY J. SHARP
                       ------------------------------------------------
                       Name: Barry J. Sharp
                       Title:Vice President and Chief Financial Officer

   Attest:
   By /s/  WILLIAM R. LURASCHI
     ------------------------------------------------
      Name: William R. Luraschi
            Title:General Counsel and SEcretary

                    THE FIRST NATIONAL BANK OF CHICAGO, AS TRUSTEE


                    By /s/ MARY FONTI
                      ------------------------------------------------
                      Name: Mary Fonti
                      Title: Assistant Vice President

   Attest:
   By /s/ MELISSA WEISMAN
     ------------------------------------------------
      Name:Melissa Weisman
            Title: Vice President



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