Document:

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                                                                   Exhibit 10.20

AMS Tijuana S.A. de C.V. ("Sub-Lessor") and Centurion International Mexico, S.A.
de C.V. ("Sub-Lessee) entered into an Agreement on April 9, 1999, whereby
Sub-Lessee agreed to sublease from Sub-Lessor 16,428.5 square feet of production
area and 1,270 square feet of office space within the building located at Paseo
Reforma s/n B-1, Fracc. Rubio, Parque Industrial La Mesa, Tijuana, Baja
California, for the period February 15, 1999 until February 14, 2000 (the
"Agreement").

Sub-Lessor and Sub-Lessee mutually agree to continue the provision of the
Agreement for the period February 15, 2000 through February 14, 2001 ("extension
period"). All provisions of the original Agreement will remain in force during
the extension period, with the exception of III. Rent a), which shall be amended
to read:

         Sub-Lessee shall pay Sub-Lessor the amount of US$7,106.36 (seven
thousand one hundred six and 36/100) Dollars Currency of the United States of
America, calculated at XX cents Currency of the United States of America per
each square foot plus the corresponding VAT, as monthly rent for the sublease of
the Subleased Area. This rent amount will be adjusted from time to time to
reflect proportionally any rent increase imposed by provisions of the Lease
Agreement between Sub-Lessor and Banca Promex, S.A.

SUB-LESSOR                                  SUB-LESSEE

By: /s/ illegible                           By: /s/ William E. Campbell
   --------------------------                  --------------------------

Date: 3/6/00                                Date: 3/1/00
     ------------------------                    ------------------------

Witness: /s/ illegible                      Witness: /s/ Lorie Rogerson
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                                                                    EXHIBIT 4.13

                                TABLE OF CONTENTS

<TABLE>
<S>                                                                                                                  <C>
Section 1.  Certain Definitions..................................................................................     1
Section 2.  Appointment of Rights Agent..........................................................................     4
Section 3   Issuance of Right Certificates.......................................................................     4
Section 4.  Form of Right Certificate............................................................................     6
Section 5.  Countersignature and Registration....................................................................     7
Section 6.  Transfer, Split-Up, Combination and Exchange of Right Certificates; Mutilated, Destroyed, Lost or
            Stolen Right Certificate.............................................................................     7
Section 7.  Exercise of Rights; Purchase Price; Expiration Date of Rights........................................     8
Section 8.  Cancellation and Destruction of Right Certificates...................................................    10
Section 9.  Reservation and Availability of Preferred Shares.....................................................    10
Section 10. Preferred Shares Record Date.........................................................................    11
Section 11. Adjustment of Purchase Price, Number and Kind of Shares or Number of Rights..........................    12
Section 12. Certificate of Adjusted Purchase Price or Number of Shares...........................................    18
Section 13. Consolidation, Merger or Sale or Transfer of Assets or Earning Power.................................    18
Section 14. Fractional Rights and Fractional Shares..............................................................    20
Section 15. Rights of Action.....................................................................................    22
Section 16. Agreement of Right Holders...........................................................................    22
Section 17. Right Certificate Holder Not Deemed a Stockholder....................................................    23
Section 18. Concerning the Rights Agent..........................................................................    23
Section 19. Merger or Consolidation or Change of Name of Rights Agent............................................    25
Section 20. Duties of Rights Agent...............................................................................    26
Section 21. Change of Rights Agent...............................................................................    28
Section 22. Issuance of New Right Certificates...................................................................    29
Section 23. Redemption and Termination...........................................................................    29
Section 24. Exchange.............................................................................................    31
Section 25. Notice of Certain Events.............................................................................    32
Section 27. Supplements and Amendments...........................................................................    33
Section 28. Determination and Actions by the Board of Directors, etc.............................................    34
Section 29. Successors...........................................................................................    34
Section 30. Benefits of this Agreement...........................................................................    34
Section 31. Severability.........................................................................................    35
Section 32. Governing Law........................................................................................    35
Section 33. Counterparts.........................................................................................    35
Section 34. Descriptive Headings.................................................................................    35
Signatures
Exhibit A -- Form of Certificate of Amendment designating the relative rights, preferences and limitations of the
                Series Preferred Stock of [Issuer]
Exhibit B -- Form of Right Certificate
Exhibit C -- Summary of Rights to Purchase Preferred Shares
</TABLE>

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<TABLE>
<S>                                                                                              <C>
Defined Term Cross Reference Sheet
Acquiring Person.......................................................................................Section 1(a)
Act....................................................................................................Section 1(b)
Adjustment Shares.................................................................................Section 11(a)(ii)
Adjusted Number of Shares........................................................................Section 11(a)(iii)
Adjusted Purchase Price..........................................................................Section 11(a)(iii)
Affiliate..............................................................................................Section 1(c)
Agreement Preface
Appointment of Rights Agent...............................................................................Section 2
Associate..............................................................................................Section 1(c)
Beneficial Owner.......................................................................................Section 1(d)
Beneficially Own.......................................................................................Section 1(d)
Business Day...........................................................................................Section 1(e)
Capital Stock Equivalent.........................................................................Section 11(a)(iii)
Close of Business......................................................................................Section 1(f)
Common Shares..........................................................................................Section 1(g)
Corporation.................................................................................................Preface
Current Per Market Price..............................................................................Section 11(d)
Current Per Share Market Price.....................................................................Section 11(d)(i)
Distribution Date......................................................................................Section 3(a)
Equivalent Preferred Shares...........................................................................Section 11(b)
Exchange Act...........................................................................................Section 1(c)
Final Expiration Date..................................................................................Section 7(a)
Interested Stockholder.................................................................................Section 1(j)
Permitted Offer........................................................................................Section 1(k)
Person.................................................................................................Section 1(l)
Preferred Shares.......................................................................................Section 1(m)
Principal Party.......................................................................................Section 13(b)
Proration Factor.................................................................................Section 11(a)(iii)
Purchase Price.........................................................................................Section 4(a)
Record Date.................................................................................................Preface
Redemption Date........................................................................................Section 7(a)
Redemption Price.........................................................................................Section 23
Right.......................................................................................................Preface
Right Certificate......................................................................................Section 3(a)
Rights Agent................................................................................................Preface
Rights Agreement..........................................................................................Section 3
Section 11(a)(ii) Event...........................................................................Section 11(a)(ii)
Section 13 Event......................................................................................Section 13(a)
Security...........................................................................................Section 11(d)(i)
Shares Acquisition Date................................................................................Section 1(q)
Subsidiary.............................................................................................Section 1(r)
Summary of Rights......................................................................................Section 3(b)
Then Outstanding..................................................................................Section 1(d)(iii)
Trading Day........................................................................................Section 11(d)(i)
</TABLE>

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<TABLE>
<S>                                                                                              <C>
Triggering Event.......................................................................................Section i(s)
Voting Securities.....................................................................................Section 13(a)
</TABLE>

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                                RIGHTS AGREEMENT

         RIGHTS AGREEMENT, dated as of August 22, 2000 (the "Agreement"),
between Southern Energy, Inc., a Delaware corporation (the "Corporation"), and
ChaseMellon Shareholder Services, L.L.C., a New Jersey limited liability
company, as Rights Agent (the "Rights Agent").

         The Board of Directors of the Corporation has authorized and declared a
dividend of one preferred share purchase right (a "Right") for each Common Share
(as hereinafter defined) of the Corporation outstanding at the close of business
on August 30, 2000 (the "Record Date"), each Right representing the right to
purchase one one-thousandth of a Preferred Share (as hereinafter defined), upon
the terms and subject to the conditions herein set forth, and has further
authorized and directed the issuance of one Right with respect to each Common
Share that shall become outstanding between the Record Date and the earliest of
the Distribution Date, the Redemption Date or the Final Expiration Date (as such
terms are hereinafter defined); provided, however, that Rights may be issued
with respect to Common Shares that shall become outstanding after the
Distribution Date and prior to the earlier of the Redemption Date and the Final
Expiration Date in accordance with the provisions of Section 22 of this
Agreement.

         Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereby agree as follows:

         Section 1.        Certain Definitions. For purposes of this Agreement,
the following terms have the meanings indicated:

         (a)      "Acquiring Person" shall mean any Person who or which,
together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of 15% or more of the then outstanding Common Shares (other
than as a result of a Permitted Offer (as hereinafter defined)) or was such a
Beneficial Owner at any time after the date hereof, whether or not such person
continues to be the Beneficial Owner of 15% or more of the then outstanding
Common Shares. Notwithstanding the foregoing, (A) the term "Acquiring Person"
shall not include (i) the Corporation, (ii) any Subsidiary of the Corporation,
(iii) any employee benefit plan of the Corporation or of any Subsidiary of the
Corporation, (iv) any Person or entity organized, appointed or established by
the Corporation for or pursuant to the terms of any such plan, or (v) any
Person, who or which together with all Affiliates and Associates of such Person
becomes the Beneficial Owner of 15% or more of the then outstanding Common
Shares as a result of the acquisition of Common Shares directly from the
Corporation or (vi) any Grandfathered Stockholder, and (B) no Person shall be
deemed to be an "Acquiring Person" either (X) as a result of the acquisition of
Common Shares by the Corporation which, by reducing the number of Common Shares
outstanding, increases the proportional number of shares beneficially owned by
such Person together with all Affiliates and Associates of such Person; except
that if (i) a Person would become an Acquiring Person (but for the operation of
this subclause (X)) as a result of the acquisition of Common Shares by the
Corporation, and (ii) after such share acquisition by the Corporation, such
Person, or an Affiliate or Associate of such Person, becomes the Beneficial
Owner of any additional Common Shares, then such Person shall be deemed an
Acquiring Person, or (Y) if (i) within 8 days after such Person would otherwise
have become an Acquiring
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Person (but for the operation of this subclause (Y)), such Person notifies the
Board of Directors that such Person did so inadvertently and (ii) within 2 days
after such notification, such Person is the Beneficial Owner of less than 15% of
the outstanding Common Shares.

         (b)      "Act" shall mean the Securities Act of 1933, as amended and as
in effect on the date of this Agreement.

         (c)      "Affiliate" and "Associate" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Securities Exchange Act of 1934, as amended and in effect on the date of
this Agreement (the "Exchange Act").

         (d)      A Person shall be deemed the "Beneficial Owner" of and shall
be deemed to "beneficially own" any securities:

                  (i)      which such Person or any of such Person's Affiliates
or Associates beneficially owns, directly or indirectly;

                  (ii)     which such Person or any of such Person's Affiliates
or Associates has (A) the right to acquire (whether such right is exercisable
immediately or only after the passage of time) pursuant to any agreement,
arrangement or understanding, or upon the exercise of conversion rights,
exchange rights, rights (other than the Rights), warrants or options, or
otherwise; provided, however, that a Person shall not be deemed the Beneficial
Owner of, or to beneficially own, securities tendered pursuant to a tender or
exchange offer made by or on behalf of such Person or any of such Person's
Affiliates or Associates until such tendered securities are accepted for
purchase or exchange; or (B) the right to vote pursuant to any agreement,
arrangement or understanding; provided, however, that a Person shall not be
deemed the Beneficial Owner of, or to beneficially own, any security if the
agreement, arrangement or understanding to vote such security (1) arises solely
from a revocable proxy or consent given to such Person in response to a public
proxy or consent solicitation made pursuant to, and in accordance with, the
applicable rules and regulations promulgated under the Exchange Act and (2) is
not also then reportable on Schedule 13D under the Exchange Act (or any
comparable or successor report); or

                  (iii)    which are beneficially owned, directly or indirectly,
by any other Person (or any Affiliate or Associate thereof) with which such
Person (or any of such Person's Affiliates or Associates) has any agreement,
arrangement or understanding (other than customary agreements with and between
underwriters and selling group members with respect to a bona fide public
offering of securities) relating to the acquisition, holding, voting (except to
the extent contemplated by the proviso to Section i(d)(ii)(B)) or disposing of
any securities of the Corporation.

         Notwithstanding anything in this definition of Beneficial Ownership to
the contrary, the phrase "then outstanding," when used with reference to a
Person's Beneficial Ownership of securities of the Corporation, shall mean the
number of such securities then issued and outstanding together with the number
of such securities not then actually issued and outstanding which such Person
would be deemed to own beneficially hereunder.

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<PAGE>   6

         (e)      "Business Day" shall mean any day other than a Saturday,
Sunday or U.S. federal holiday or a day on which banking institutions in the
state of New York or the city in which the office of the Rights Agent is located
are authorized or obligated by law or executive order to close.

         (f)      "Close of business" on any given date shall mean 5:00 P.M.,
New York time, on such date; provided, however, that if such date is not a
Business Day it shall mean 5:00 PM., New York time, on the next succeeding
Business Day.

         (g)      "Common Shares" when used with reference to the Corporation
shall mean the shares of Common Stock, par value $0.01 per share, of the
Corporation or, in the event of a subdivision, combination or consolidation with
respect to such shares of Common Stock, the shares of Common Stock resulting
from such subdivision, combination or consolidation. "Common Shares" when used
with reference to any Person other than the Corporation shall mean the capital
stock (or equity interest) with the greatest voting power of such other Person
or, if such other Person is a Subsidiary of another Person, the Person or
Persons which ultimately control such first-mentioned Person.

         (h)      "Distribution Date" shall have the meaning set forth in
Section 3 hereof.

         (i)      "Final Expiration Date" shall have the meaning set forth in
Section 7 hereof.

         (j)      "Grandfathered Stockholder" shall mean at any time The
Southern Company, provided that, at the time in question The Southern Company is
the Beneficial Owner of 80% of the Common Shares beneficially owned by The
Southern Company on the date of this Agreement.

         (j)      "Interested Stockholder" shall mean any Acquiring Person or
any Affiliate or Associate of an Acquiring Person or any other Person in which
any such Acquiring Person, Affiliate or Associate has an interest, or any other
Person acting directly or indirectly on behalf of or in concert with any such
Acquiring Person, Affiliate or Associate.

         (k)      "Permitted Offer" shall mean a tender or exchange offer which
is for all outstanding Common Shares at a price and on terms determined, prior
to the purchase of shares under such tender or exchange offer, by at least a
majority of the members of the Board of Directors who are not officers of the
Corporation and who are not Acquiring Persons or Affiliates, Associates,
nominees or representatives of an Acquiring Person, to be adequate (taking into
account all factors that such Directors deem relevant including, without
limitation, prices that could reasonably be achieved if the Corporation or its
assets were sold on an orderly basis designed to realize maximum value) and
otherwise in the best interests of the Corporation and its stockholders (other
than the Person or any Affiliate or Associate thereof on whose basis the offer
is being made) taking into account all factors that such directors may deem
relevant.

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<PAGE>   7

         (l)      "Person" shall mean any individual, firm, partnership,
corporation, trust, association, joint venture or other entity, and shall
include any successor (by merger or otherwise) of such entity.

         (m)      "Preferred Shares" shall mean shares of Series A Junior
Preferred Stock, without par value of the Corporation having the relative
rights, preferences and limitations set forth in the Form of Certificate of
Amendment attached to this Agreement as Exhibit A.

         (n)      "Redemption Date" shall have the meaning set forth in Section
7 hereof.

         (o)      "Section 11(a)(ii) Event" shall mean any event described in
Section 11(a)(ii) hereof.

         (p)      "Section 13 Event" shall mean any event described in clause
(x), (y) or (z) of Section 13(a) hereof.

         (q)      "Shares Acquisition Date" shall mean the first date of public
announcement (which, for purposes of this definition, shall include, without
limitation, a report filed pursuant to the Exchange Act) by the Corporation or
an Acquiring Person that an Acquiring Person has become such; provided, that, if
such Person is determined not to have become an Acquiring Person pursuant to
Section l(b)(Y) hereof, then no Shares Acquisition Date shall be deemed to have
occurred.

         (r)      "Subsidiary" of any Person shall mean any corporation or other
Person of which a majority of the voting power of the voting equity securities
or equity interest is owned, directly or indirectly, by such Person.

         (s)      "Triggering Event" shall mean any Section 11(a)(ii) Event or
any Section 13 Event.

         Section 2.        Appointment of Rights Agent. The Corporation hereby
appoints the Rights Agent to act as agent for the Corporation in accordance with
the terms and conditions hereof, and the Rights Agent hereby accepts such
appointment. The Corporation may from time to time appoint such co-Rights Agents
as it may deem necessary or desirable. The Rights Agent shall have no duty or
obligation to take any action under any Section of this Agreement which requires
the payment by a Rights holder of applicable taxes and governmental charges
unless and until the Rights Agent is satisfied that all such taxes and/or
charges have been paid.

         Section 3.        Issuance of Right Certificates. (a) Until the earlier
of (i) the Shares Acquisition Date or (ii) the close of business on the tenth
day (or such later date as may be determined by action of the Corporation's
Board of Directors) after the date of the commencement by any Person (other than
the Corporation, any Subsidiary of the Corporation, any employee benefit plan of
the Corporation or of any Subsidiary of the Corporation or any Person or entity
organized, appointed or established by the Corporation for or pursuant to the
terms of any such plan) of, or of the first public announcement of the intention
of any Person (other than the Corporation, any Subsidiary of the Corporation,
any employee benefit plan of the

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Corporation or of any Subsidiary of the Corporation or any Person or entity
organized, appointed or established by the Corporation for or pursuant to the
terms of any such plan) to commence (which intention to commence remains in
effect for five Business Days after such announcement), a tender or exchange
offer the consummation of which would result in any Person becoming an Acquiring
Person (including, in the case of both (i) and (ii), any such date which is
after the date of this Agreement and prior to the issuance of the Rights), the
earlier of such dates being herein referred to as the "Distribution Date," (x)
the Rights will be evidenced (subject to the provisions of Section 3(b) hereof)
by the certificates for Common Shares registered in the names of the holders
thereof (which certificates shall also be deemed to be Right Certificates) and
not by separate Right Certificates, and (y) the right to receive Right
Certificates will be transferable only in connection with the transfer of the
underlying Common Shares (including a transfer to the Corporation); provided,
however, that if a tender offer is terminated prior to the occurrence of a
Distribution Date, then no Distribution Date shall occur as a result of such
tender offer. As soon as practicable after the Distribution Date, the
Corporation will prepare and execute, the Rights Agent will countersign, and the
Corporation will send or cause to be sent by first-class, postage-prepaid mail,
to each record holder of Common Shares as of the close of business on the
Distribution Date, at the address of such holder shown on the records of the
Corporation, a Right Certificate, substantially in the form of Exhibit B hereto
(a "Right Certificate"), evidencing one Right for each Common Share so held. As
of and after the Distribution Date, the Rights will be evidenced solely by such
Right Certificates.

         (b)      As promptly as practicable following the Record Date, the
Corporation will send a copy of a Summary of Rights to Purchase Preferred
Shares, in substantially the form of Exhibit C hereto (the "Summary of Rights"),
by first-class, postage-prepaid mail, to each record holder of Common Shares as
of the close of business on the Record Date, at the address of such holder shown
on the records of the Corporation. With respect to certificates for Common
Shares outstanding as of the Record Date, until the Distribution Date, the
Rights will be evidenced by such certificates registered in the names of the
holders thereof together with a copy of the Summary of Rights attached thereto.
Until the Distribution Date (or the earlier of the Redemption Date or the Final
Expiration Date), the surrender for transfer of any certificate for Common
Shares outstanding on the Record Date, with or without a copy of the Summary of
Rights attached thereto, shall also constitute the transfer of the Rights
associated with such Common Shares.

         (c)      Certificates for Common Shares which become outstanding
(including, without limitation, reacquired Common Shares referred to in the last
sentence of this paragraph (c)) after the Record Date but prior to the earliest
of the Distribution Date, the Redemption Date or the Final Expiration Date,
shall be deemed also to be certificates for Rights, and shall bear the following
legend:

         This certificate also evidences and entitles the holder hereof
         to certain rights as set forth in a Rights Agreement between
         Southern Energy, Inc. and ChaseMellon Shareholder Services as
         Rights Agent, dated as of August 22, 2000 (the "Rights
         Agreement"), the terms of which are hereby incorporated herein
         by reference and a copy of which is on file at the principal
         executive offices of Southern Energy, Inc. Under certain
         circumstances, as set forth in the Rights Agreement, such
         Rights will

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<PAGE>   9

         be evidenced by separate certificates and will no longer be
         evidenced by this certificate. Southern Energy, Inc. will mail
         to the holder of this certificate a copy of the Rights
         Agreement without charge after receipt of a written request
         therefor. Under certain circumstances set forth in the Rights
         Agreement, Rights issued to, or held by, any Person who is,
         was or becomes an Acquiring Person or an Affiliate or
         Associate thereof (as defined in the Rights Agreement) and
         certain related persons, whether currently held by or on
         behalf of such Person or by any subsequent holder, may become
         null and void.

With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Shares represented by
such certificates shall be evidenced by such certificates alone, and the
surrender for transfer of any such certificate shall also constitute the
transfer of the Rights associated with the Common Shares represented thereby. In
the event that the Corporation purchases or acquires any Common Shares after the
Record Date but prior to the Distribution Date, any Rights associated with such
Common Shares shall be deemed canceled and retired so that the Corporation shall
not be entitled to exercise any Rights associated with the Common Shares which
are no longer outstanding.

         Section 4.        Form of Right Certificate. (a) The Right Certificates
(and the forms of election to purchase and of assignment to be printed on the
reverse thereof) shall be substantially in the form set forth in Exhibit B
hereto and may have such marks of identification or designation and such
legends, summaries or endorsements printed thereon as the Corporation may deem
appropriate, which does not affect the duties or responsibilities of the Rights
Agent and as are not inconsistent with the provisions of this Agreement, or as
may be required to comply with any applicable law or with any rule or regulation
made pursuant thereto or with any rule or regulation of any stock exchange on
which the Rights may from time to time be listed, or to conform to usage.
Subject to the provisions of Section 11 and Section 22 hereof, the Right
Certificates shall entitle the holders thereof to purchase such number of
one-thousandths of a Preferred Share as shall be set forth therein at the price
per one one-thousandth of a Preferred Share set forth therein (the "Purchase
Price"), but the amount and type of securities purchasable upon the exercise of
each Right and the Purchase Price thereof shall be subject to adjustment as
provided herein.

         (b)      Any Right Certificate issued pursuant to Section 3(a) or
Section 22 hereof that represents Rights which are null and void pursuant to
Section 7(e) of this Agreement and any Right Certificate issued pursuant to
Section 6 or Section 11 hereof upon transfer, exchange, replacement or
adjustment of any other Right Certificate referred to in this sentence, shall
contain (to the extent feasible) the following legend:

         The Rights represented by this Right Certificate are or were
         beneficially owned by a Person who was or became an Acquiring
         Person or an Affiliate or Associate of an Acquiring Person (as
         such terms are defined in the Rights Agreement). Accordingly,
         this Right Certificate and the Rights represented hereby are
         null and void.

Provisions of Section 7(e) of this Rights Agreement shall be operative whether
or not the foregoing legend is contained on any such Right Certificate.

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<PAGE>   10

         Section 5.        Countersignature and Registration. The Right
Certificates shall be executed on behalf of the Corporation by its Chairman of
the Board, its Chief Executive Officer, its President, any of its Vice
Presidents, or its Treasurer, either manually or by facsimile signature, shall
have affixed thereto the Corporation's seal or a facsimile thereof, and shall be
attested by the Secretary or an Assistant Secretary of the Corporation, either
manually or by facsimile signature. The Right Certificates shall be
countersigned by the Rights Agent and shall not be valid for any purpose unless
so countersigned. In case any officer of the Corporation who shall have signed
any of the Right Certificates shall cease to be such officer of the Corporation
before countersignature by the Rights Agent and issuance and delivery by the
Corporation, such Right Certificates may nevertheless be countersigned by the
Rights Agent and issued and delivered by the Corporation with the same force and
effect as though the person who signed such Right Certificates had not ceased to
be such officer of the Corporation; and any Right Certificate may be signed on
behalf of the Corporation by any person who, at the actual date of the execution
of such Right Certificate, shall be a proper officer of the Corporation to sign
such Right Certificate, although at the date of the execution of this Rights
Agreement any such person was not such an officer.

         Following the Distribution Date and receipt by the Rights Agent of all
necessary information, the Rights Agent will keep or cause to be kept, at its
office or offices designated as the appropriate place for surrender of such
Right Certificate or transfer, books for registration and transfer of the Right
Certificates issued hereunder. Such books shall show the names and addresses of
the respective holders of the Right Certificates, the number of Rights evidenced
on its face by each of the Right Certificates and the certificate number and the
date of each of the Right Certificates.

         Section 6.        Transfer, Split-Up, Combination and Exchange of Right
Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificates. Subject
to the provisions of Section 4(b), Section 7(e) and Section 14 hereof, at any
time after the close of business on the Distribution Date, and at or prior to
the close of business on the earlier of the Redemption Date or the Final
Expiration Date, any Right Certificate or Right Certificates may be transferred,
split up, combined or exchanged for another Right Certificate or Right
Certificates, entitling the registered holder to purchase a like number of one
one-thousandths of a Preferred Share (or, following a Triggering Event, other
securities, as the case may be) as the Right Certificate or Right Certificates
surrendered then entitled to such holder (or former holder in the case of a
transfer) to purchase. Any registered holder desiring to transfer, split up,
combine or exchange any Right Certificate or Right Certificates shall make such
request in writing delivered to the Rights Agent, and shall surrender the Right
Certificate or Right Certificates to be transferred, split up, combined or
exchanged at the office or offices of the Rights Agent designated for such
purpose. Neither the Rights Agent nor the Corporation shall be obligated to take
any action whatsoever with respect to the transfer of any such surrendered Right
Certificate until the registered holder shall have completed and signed the
certificate contained in the form of assignment on the reverse side of such
Right Certificate and shall have provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Corporation shall reasonably request. Thereupon the
Rights Agent shall, subject to Section 4(b), Section 7(e) and Section 14 hereof,
countersign and deliver to the Person entitled thereto a Right Certificate or
Right Certificates, as the case maybe, as so requested. The

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<PAGE>   11

Corporation may require payment of a sum sufficient to cover any tax or charge
that may be imposed in connection with any transfer, split up, combination or
exchange of Right Certificates. The Rights Agent shall have no duty or
obligation under this section unless and until it is satisfied that all such
taxes and/or charges have been paid.

         Upon receipt by the Corporation and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Right Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to them, and, at the Corporation's request,
reimbursement to the Corporation and the Rights Agent of all reasonable expenses
incidental thereto, and upon surrender to the Rights Agent and cancellation of
the Right Certificate if mutilated, the Corporation will make and deliver a new
Right Certificate of like tenor to the Rights Agent for countersignature and
delivery to the registered holder in lieu of the Right Certificate so lost,
stolen, destroyed or mutilated.

         Section 7.        Exercise of Rights; Purchase Price; Expiration Date
of Rights. (a) Subject to Section 7(e) hereof, the registered holder of any
Right Certificate may exercise the Rights evidenced thereby (except as otherwise
provided herein) in whole or in part at any time after the Distribution Date
upon surrender of the Right Certificate, with the form of election to purchase
and the certificate on the reverse side thereof duly and properly executed, to
the Rights Agent at the principal office or offices of the Rights Agent
designated for such purpose, together with payment of the aggregate Purchase
Price for the total number of one one-thousandths of a Preferred Share (or other
securities, as the case may be) as to which such surrendered Rights are
exercised, at or prior to the earliest of (i) the close of business on August
22, 2010 (the "Final Expiration Date"), or (ii) the time at which the Rights are
redeemed as provided in Section 23 hereof (the "Redemption Date").

         (b)      The Purchase Price for each one one-thousandths of a Preferred
Share pursuant to the exercise of a Right shall initially be $250.00, shall be
subject to adjustment from time to time as provided in the next sentence and in
Sections 11 and 13(a) hereof and shall be payable in accordance with paragraph
(c) below. Anything in this Agreement to the contrary notwithstanding, in the
event that at any time after the date of this Agreement and prior to the
Distribution Date, the Corporation shall (i) declare or pay any dividend on the
Common Shares payable in Common Shares or (ii) effect a subdivision, combination
or consolidation of the Common Shares (by reclassification or otherwise than by
payment of dividends in Common Shares) into a greater or lesser number of Common
Shares, then in any such case, each Common Share outstanding following such
subdivision, combination or consolidation shall continue to have a Right
associated therewith and the Purchase Price following any such event shall be
proportionately adjusted to equal the result obtained by multiplying the
Purchase Price immediately prior to such event by a fraction the numerator of
which shall be the total number of Common Shares outstanding immediately prior
to the occurrence of the event and the denominator of which shall be the total
number of Common Shares outstanding immediately following the occurrence of such
event. The adjustment provided for in the preceding sentence shall be made
successively whenever such a dividend is declared or paid or such a subdivision,
combination or consolidation is effected.

                                       8
<PAGE>   12

         (c)      Upon receipt of a Right Certificate representing exercisable
Rights, with the form of election to purchase and the certificate duly and
properly executed, accompanied by payment of the Purchase Price for the
Preferred Shares (or other securities, as the case may be) to be purchased and
an amount equal to any applicable tax or charge required to be paid by the
holder of such Right Certificate in accordance with Section 6 hereof by
certified check, cashier's check or money order payable to the order of the
Corporation, the Rights Agent shall thereupon promptly (i) (A) requisition from
any transfer agent of the Preferred Shares certificates for the number of
Preferred Shares to be purchased and the Corporation hereby irrevocably
authorizes its transfer agent to comply with all such requests, or (B) if the
Corporation, in its sole discretion, shall have elected to deposit the Preferred
Shares issuable upon exercise of the Rights hereunder into a depositary,
requisition from the depositary agent depositary receipts representing such
number of one one-thousandths of a Preferred Share as are to be purchased (in
which case certificates for the Preferred Shares represented by such receipts
shall be deposited by the transfer agent with the depositary agent) and the
Corporation will direct the depositary agent to comply with such requests, (ii)
when appropriate, requisition from the Corporation the amount of cash to be paid
in lieu of issuance of fractional shares in accordance with Section 14 hereof,
(iii) after receipt of such certificates or depositary receipts, cause the same
to be delivered to or upon the order of the registered holder of such Right
Certificate, registered in such name or names as may be designated by such
holder, and (iv) when appropriate, after receipt thereof, deliver such cash to
or upon the order of the registered holder of such Right Certificate. In the
event that the Corporation is obligated to issue other securities (including
Common Shares) of the Corporation pursuant to Section 11(a) hereof, the
Corporation will make all arrangements necessary so that such other securities
are available for distribution by the Rights Agent, if and when appropriate.

         In addition, in the case of an exercise of the Rights by a holder
pursuant to Section 11(a)(ii), the Rights Agent shall return such Right
Certificate to the registered holder thereof after imprinting, stamping or
otherwise indicating thereon that the rights represented by such Right
Certificate no longer include the rights provided by Section 11(a)(ii) of the
Rights Agreement and if less than all the Rights represented by such Right
Certificate were so exercised, the Rights Agent shall indicate on the Right
Certificate the number of Rights represented thereby which continue to include
the rights provided by Section 11(a)(ii).

         (d)      In case the registered holder of any Right Certificate shall
exercise less than all the Rights evidenced thereby, a new Right Certificate
evidencing Rights equivalent to the Rights remaining unexercised shall be issued
by the Rights Agent to the registered holder of such Right Certificate or to his
duly authorized assigns, subject to the provisions of Section 14 hereof, or the
Rights Agent shall place an appropriate notation on the Right Certificate with
respect to those Rights exercised.

         (e)      Notwithstanding anything in this Agreement to the contrary,
from and after the first occurrence of a Section 11(a)(ii) Event, any Rights
beneficially owned by (i) an Acquiring Person or an Affiliate or Associate of an
Acquiring Person, (ii) a transferee of an Acquiring Person (or of any Affiliate
or Associate thereof) who becomes a transferee after the Acquiring Person
becomes such, or (iii) a transferee of an Acquiring Person (or of any Affiliate
or Associate thereof) who becomes a transferee prior to or concurrently with the
Acquiring Person becoming

                                       9
<PAGE>   13

such and receives such Rights pursuant to either (A) a transfer (whether or not
for consideration) from the Acquiring Person to holders of equity interests in
such Acquiring Person or to any Person with whom the Acquiring Person has a
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Corporation has
determined is part of a plan, arrangement or understanding which has as a
primary purpose or effect the avoidance of this Section 7(e), shall become null
and void without any further action and no holder of such Rights shall have any
rights whatsoever with respect to such Rights, whether under any provision of
this Agreement or otherwise. The Corporation shall use all reasonable efforts to
insure that the provisions of this Section 7(e) and Section 4(b) hereof are
complied with, but shall have no liability to any holder of Right Certificates
or other Person as a result of its failure to make any determinations with
respect to an Acquiring Person or its Affiliates, Associates or transferees
hereunder.

         (f)      Notwithstanding anything in this Agreement to the contrary,
neither the Rights Agent nor the Corporation shall be obligated to undertake any
action with respect to a registered holder upon the occurrence of any purported
exercise as set forth in this Section 7 unless such registered holder shall have
(i) completed and signed the certificate contained in the form of election to
purchase set forth on the reverse side of the Right Certificate surrendered for
such exercise, and (ii) provided such additional evidence of the identity of the
Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates
thereof as the Corporation or Rights Agent shall reasonably request.

         Section 8.        Cancellation and Destruction of Right Certificates.
All Right Certificates surrendered for the purpose of exercise, transfer, split
up, combination or exchange shall, if surrendered to the Corporation or to any
of its agents, be delivered to the Rights Agent for cancellation or in cancelled
form, or, if surrendered to the Rights Agent, shall be cancelled by it, and no
Right Certificates shall be issued in lieu thereof except as expressly permitted
by any of the provisions of this Rights Agreement. The Corporation shall deliver
to the Rights Agent for cancellation and retirement, and the Rights Agent shall
so cancel and retire, any other Right Certificate purchased or acquired by the
Corporation otherwise than upon the exercise thereof. The Rights Agent shall
deliver all cancelled Right Certificates to the Corporation, or shall, at the
written request of the Corporation, destroy such cancelled Right Certificates,
and in such case shall deliver a certificate of destruction thereof to the
Corporation.

         Section 9.        Reservation and Availability of Preferred Shares. The
Corporation covenants and agrees that at all times prior to the occurrence of a
Section 11(a)(ii) Event it will cause to be reserved and kept available out of
its authorized and unissued Preferred Shares, or any authorized and issued
Preferred Shares held in its treasury, the number of Preferred Shares that will
be sufficient to permit the exercise in full of all outstanding Rights and,
after the occurrence of a Section 11 (a)(ii) Event, shall, to the extent
reasonably practicable, so reserve and keep available a sufficient number of
Common Shares (and/or other securities) which may be required to permit the
exercise in full of the Rights pursuant to this Agreement.

         So long as the Preferred Shares (and, after the occurrence of a Section
11(a)(ii) Event, Common Shares or any other securities) issuable upon the
exercise of the Rights may be listed on any national securities exchange, the
Corporation shall use its best efforts to cause, from and

                                       10
<PAGE>   14

after such time as the Rights become exercisable, all shares reserved for such
issuance to be Listed on such exchange upon official notice of issuance upon
such exercise.

         The Corporation covenants and agrees that it will take all such action
as may be necessary to ensure that all Preferred Shares (or Common Shares and/or
other securities, as the case may be) delivered upon exercise of Rights shall,
at the time of delivery of the certificates for such shares or other securities
(subject to payment of the Purchase Price), be duly and validly authorized and
issued and fully paid and non-assessable shares or securities.

         The Corporation further covenants and agrees that it will pay when due
and payable any and all taxes and charges which may be payable in respect of the
issuance or delivery of the Right Certificates or of any Preferred Shares (or
Common Shares and/or other securities, as the case may be) upon the exercise of
Rights. The Corporation shall not, however, be required to pay any tax or charge
which may be payable in respect of any transfer or delivery of Right
Certificates to a person other than, or the issuance or delivery of certificates
or depository receipts for the Preferred Shares (or Common Shares and/or other
securities, as the case may be) in a name other than that of, the registered
holder of the Right Certificate evidencing Rights surrendered for exercise, or
to issue or to deliver any certificates or depositary receipts for Preferred
Shares (or Common Shares and/or other securities, as the case may be) upon the
exercise of any Rights, until any such tax shall have been paid (any such tax or
charge being payable by the holder of such Right Certificate at the time of
surrender) or until it has been established to the Corporation's reasonable
satisfaction that no such tax or charge is due.

         The Corporation shall use its best efforts to (i) file, as soon as
practicable following the Shares Acquisition Date, a registration statement
under the Act, with respect to the securities purchasable upon exercise of the
Rights on an appropriate form, (ii) cause such registration statement to become
effective as soon as practicable after such filing, and (iii) cause such
registration statement to remain effective (with a prospectus at all times
meeting the requirements of the Act and the rules and regulations thereunder)
until the date of the expiration of the rights provided by Section 11(a)(ii).
The Corporation will also take such action as may be appropriate under the blue
sky laws of the various states.

         Section 10.       Preferred Shares Record Date. Each person in whose
name any certificate for Preferred Shares (or Common Shares and/or other
securities, as the case may be) is issued upon the exercise of Rights shall for
all purposes be deemed to have become the holder of record of the Preferred
Shares (or Common Shares and/or other securities, as the case may be)
represented thereby on, and such certificate shall be dated, the date upon which
the Right Certificate evidencing such Rights was duly surrendered and payment of
the Purchase Price (and any applicable taxes or charges) was made; provided,
however, that, if the date of such surrender and payment is a date upon which
the Preferred Shares (or Common Shares and/or other securities, as the case may
be) transfer books of the Corporation are closed, such person shall be deemed to
have become the record holder of such shares on, and such certificate shall be
dated, the next succeeding Business Day on which the Preferred Shares (or Common
Shares and/or other securities, as the case may be) transfer books of the
Corporation are open.

                                       11
<PAGE>   15

         Section 11.       Adjustment of Purchase Price, Number and Kind of
Shares or Number of Rights. The Purchase Price, the number and kind of shares
covered by each Right and the number of Rights outstanding are subject to
adjustment from time to time as provided in this Section 11.

         (a)(i)   In the event the Corporation shall at any time after the date
of this Agreement (A) declare a dividend on the Preferred Shares payable in
Preferred Shares, (B) subdivide the outstanding Preferred Shares, (C) combine
the outstanding Preferred Shares into a smaller number of Preferred Shares or
(D) issue any shares of its capital stock in a reclassification of the Preferred
Shares (including any such reclassification in connection with a consolidation
or merger in which the Corporation is the continuing or surviving corporation),
except as otherwise provided in this Section 11(a) and Section 7(e) hereof, the
Purchase Price in effect at the time of the record date for such dividend or of
the effective date of such subdivision, combination or reclassification, and the
number and kind of shares of capital stock issuable on such date, shall be
proportionately adjusted so that the holder of any Right exercised after such
time shall be entitled to receive the aggregate number and kind of shares of
capital stock which, if such Right had been exercised immediately prior to such
date and at a time when the Preferred Shares transfer books of the Corporation
were open, such holder would have owned upon such exercise and been entitled to
receive by virtue of such dividend, subdivision, combination or
reclassification; provided, however, that in no event shall the consideration to
be paid upon the exercise of one Right be less than the aggregate par value of
the shares of capital stock of the Corporation issuable upon exercise of one
Right. If an event occurs which would require an adjustment under both Section
11(a)(i) and Section 11(a)(ii), the adjustment provided for in this Section
11(a)(i) shall be in addition to, and shall be made prior to, any adjustment
required pursuant to Section 11(a)(ii).

         (ii)     In the event any Person, alone or together with its Affiliates
and Associates, shall become an Acquiring Person, then proper provision shall be
made so that each holder of a Right (except as provided below and in Section
7(e) hereof) shall, for a period of 60 days after the later of the occurrence of
any such event or the effective date of an appropriate registration statement
under the Act pursuant to Section 9 hereof, have a right to receive, upon
exercise thereof at a price equal to the then current Purchase Price, in
accordance with the terms of this Agreement, such number of Common Shares (or,
in the discretion of the Board of Directors, one one-thousandth of a Preferred
Share) as shall equal the result obtained by (x) multiplying the then current
Purchase Price by the then number of one one-thousandths of a Preferred Share
for which a Right was exercisable immediately prior to the first occurrence of a
Section 11(a)(ii) Event, and dividing that product by (y) 50% of the then
current per share market price of the Corporation's Common Shares (determined
pursuant to Section 11(d) hereof) on the date of such first occurrence (such
number of shares being referred to as the "Adjustment Shares"); provided,
however, that if the transaction that would otherwise give rise to the foregoing
adjustment is also subject to the provisions of Section 13 hereof, then only the
provisions of Section 13 hereof shall apply and no adjustment shall be made
pursuant to this Section 11(a)(ii);

         (iii)    In the event that there shall not be sufficient treasury
shares or authorized but unissued (and unreserved) Common Shares to permit the
exercise in full of the Rights in accordance with the foregoing subparagraph
(ii) and the Rights become so exercisable (and the Board has determined to make
the Rights exercisable into fractions of a Preferred Share)

                                       12
<PAGE>   16

notwithstanding any other provision of this Agreement, to the extent necessary
and permitted by applicable law, each Right shall thereafter represent the right
to receive, upon exercise thereof at the then current Purchase Price in
accordance with the terms of this Agreement, (x) a number of (or fractions of)
Common Shares (up to the maximum number of Common Shares which may permissibly
be issued) and (y) one one-thousandths of a Preferred Share or a number of, or
fractions of other equity securities of the Corporation (or, in the discretion
of the Board of Directors, debt) which the Board of Directors of the Corporation
has determined to have the same aggregate current market value (determined
pursuant to Section 11(d)(i) and (ii) hereof, to the extent applicable,) as one
Common Share (such number of, or fractions of, Preferred Shares, debt, or other
equity securities or debt of the Corporation) being referred to as a "capital
stock equivalent," equal in the aggregate to the number of Adjustment Shares;
provided, however, if sufficient Common Shares and/or capital stock equivalents
are unavailable, then the Corporation shall, to the extent permitted by
applicable law, take all such action as may be necessary to authorize additional
Common Shares or capital stock equivalents for issuance upon exercise of the
Rights, including the calling of a meeting of stockholders; and provided,
further, that if the Corporation is unable to cause sufficient Common Shares
and/or capital stock equivalents to be available for issuance upon exercise in
full of the Rights, then each Right shall thereafter represent the right to
receive the Adjusted Number of Shares upon exercise at the Adjusted Purchase
Price (as such terms are hereinafter defined). As used herein, the term
"Adjusted Number of Shares" shall be equal to that number of (or fractions of)
Common Shares (and/or capital stock equivalents) equal to the product of (x) the
number of Adjustment Shares and (y) a fraction, the numerator of which is the
number of Common Shares (and/or capital stock equivalents) available for
issuance upon exercise of the Rights and the denominator of which is the
aggregate number of Adjustment Shares otherwise issuable upon exercise in full
of all Rights (assuming there were a sufficient number of Common Shares
available) (such fraction being referred to as the "Proration Factor"). The
"Adjusted Purchase Price" shall mean the product of the Purchase Price and the
Proration Factor. The Board of Directors may, but shall not be required to,
establish procedures to allocate the right to receive Common Shares and capital
stock equivalents upon exercise of the Rights among holders of Rights.

         (b)      In case the Corporation shall fix a record date for the
issuance of rights (other than the Rights), options or warrants to all holders
of Preferred Shares entitling them (for a period expiring within 45 calendar
days after such record date) to subscribe for or purchase Preferred Shares (or
shares having the same rights, privileges and preferences as the Preferred
Shares ("equivalent preferred shares")) or securities convertible into Preferred
Shares or equivalent preferred shares at a price per Preferred Share or
equivalent preferred share (or having a conversion price per share, if a
security convertible into Preferred Shares or equivalent preferred shares) less
than the then current per share market price of the Preferred Shares (as
determined pursuant to Section 11(d) hereof) on such record date, the Purchase
Price to be in effect after such record date shall be determined by multiplying
the Purchase Price in effect immediately prior to such record date by a
fraction, the numerator of which shall be the number of Preferred Shares
outstanding on such record date plus the number of Preferred Shares which the
aggregate offering price of the total number of Preferred Shares and/or
equivalent preferred shares so to be offered (and/or the aggregate initial
conversion price of the convertible securities so to be offered) would purchase
at such current per share market price, and the denominator of which shall be
the number of Preferred Shares outstanding on such record date plus the number
of

                                       13
<PAGE>   17

additional Preferred Shares and/or equivalent preferred shares to be offered for
subscription or purchase (or into which the convertible securities so to be
offered are initially convertible); provided, however, that in no event shall
the consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Corporation issuable
upon exercise of one Right. In case such subscription price may be paid in a
consideration part or all of which shall be in a form other than cash, the value
of such consideration shall be determined in good faith by the Board of
Directors of the Corporation, whose determination shall be described in a
statement filed with the Rights Agent and shall be binding on the Rights Agent.
Preferred Shares owned by or held for the account of the Corporation shall not
be deemed outstanding for the purpose of any such computation. Such adjustment
shall be made successively whenever such a record date is fixed; and in the
event that such rights, options or warrants are not so issued, the Purchase
Price shall be adjusted to be the Purchase Price which would then be in effect
if such record date had not been fixed.

         (c)      In case the Corporation shall fix a record date for the making
of a distribution to all holders of the Preferred Shares (including any such
distribution made in connection with a consolidation or merger in which the
Corporation is the continuing or surviving corporation) of evidences of
indebtedness or assets (other than a regular quarterly cash dividend or a
dividend payable in Preferred Shares) or subscription rights or warrants
(excluding those referred to in Section 11(b) hereof), the Purchase Price to be
in effect after such" record date shall be determined by multiplying the
Purchase Price in effect immediately prior to such record date by a fraction,
the numerator of which shall be the then current per share market price (as
determined pursuant to Section 11(d) hereof) of the Preferred Shares on such
record date, less the fair market value (as determined in good faith by the
Board of Directors of the Corporation, whose determination shall be described in
a statement filed with the Rights Agent and shall be binding on the Rights
Agent) of the portion of the assets or evidences of indebtedness so to be
distributed or of such subscription rights or warrants applicable to one
Preferred Share and the denominator of which shall be such current per share
market price of the Preferred Shares; provided, however, that in no event shall
the consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Corporation to be
issued upon exercise of one Right. Such adjustments shall be made successively
whenever such a record date is fixed; and in the event that such distribution is
not so made, the Purchase Price shall again be adjusted to be the Purchase Price
which would then be in effect if such record date had not been fixed.

         (d)(i)   For the purpose of any computation hereunder, the "current per
share market price" of any security (a "Security" for the purpose of this
Section 11(d)(i)) on any date shall be deemed to be the average of the daily
closing prices per share of such Security for the thirty (30) consecutive
Trading Days (as such term is hereinafter defined) immediately prior to but not
including such date; provided, however, that in the event that the current per
share market price of the Security is determined during a period following the
announcement by the issuer of such Security of (A) a dividend or distribution on
such Security payable in shares of such Security or securities convertible into
such shares, or (B) any subdivision, combination or reclassification of such
Security and prior to the expiration of thirty (30) Trading Days after but not
including the ex-dividend date for such dividend or distribution, or the record
date for such subdivision, combination or reclassification, then, and in each
such case, the current per share market price shall be appropriately adjusted to
reflect the current market price per share equivalent of such

                                       14
<PAGE>   18

Security. The closing price for each day shall be the last sale price, regular
way, or, in case no such sale takes place on such day, the average of the
closing bid and asked prices, regular way, in either case as reported in the
principal consolidated transaction reporting system with respect to securities
listed or admitted to trading on the New York Stock Exchange or, if the Security
is not listed or admitted to trading on the New York Stock Exchange, as reported
in the principal consolidated transaction reporting system with respect to
securities listed on principal national securities exchange on which the
Security is listed or admitted to trading or, if the Security is not listed or
admitted to trading on any national securities exchange, the last quoted price
or, if not so quoted, the average of the high bid and low asked prices in the
over-the-counter market, as reported by the National Association of Securities
Dealers, Inc. Automated Quotations System ("NASDAQ") or such other system then
in use, or, if on any such date the Security is not quoted by any such
organization, the average of the closing bid and asked prices as furnished by a
professional market maker making a market in the Security selected by the Board
of Directors of the Corporation. If on any such date no such market maker is
making market in the Security, the fair value of the Security on such date as
determined in good faith by the Board of Directors of the Corporation shall be
used. The term "Trading Day" shall mean a day on which the principal national
securities exchange on which the Security is listed or admitted to trading is
open for the transaction of business or, if the Security is not listed or
admitted to trading on any national securities exchange, a Business Day.

         (ii)     For the purpose of any computation hereunder, the "current per
share market price" of the Preferred Shares shall be determined in accordance
with the method set forth in Section 11(d)(i). If the Preferred Shares are not
publicly traded, the "current per share market price" of the Preferred Shares
shall be conclusively deemed to be the current per share market price of the
Common Shares as determined pursuant to Section 11(d)(i) (appropriately adjusted
to reflect any stock split, stock dividend or similar transaction occurring
after the date hereof), multiplied by one thousand (1,000). If neither the
Common Shares nor the Preferred Shares are publicly held or so listed or traded,
"current per share market price" shall mean the fair value per share as
determined in good faith by the Board of Directors of the Corporation, whose
determination shall be described in a statement filed with the Rights Agent and
shall be binding on the Rights Agent.

         (e)      Anything herein to the contrary notwithstanding, no adjustment
in the Purchase Price shall be required unless such adjustment would require an
increase or decrease of at least 1% in the Purchase Price; provided, however,
that any adjustments which by reason of this Section 11(e) are not required to
be made shall be carried forward and taken into account in any subsequent
adjustment. All calculations under this Section 11 shall be made to the nearest
cent or to the nearest one one-thousandth of a Preferred Share or one
ten-thousandth of any other share or security as the case may be.
Notwithstanding the first sentence of this Section 11(e), any adjustment
required by this Section 11 shall be made no later than the earlier of (i) three
(3) years from the date of the transaction which mandates such adjustment or
(ii) the Final Expiration Date.

         (f)      If as a result of an adjustment made pursuant to Section 11(a)
(ii) or Section 13(a) hereof, the holder of any Right thereafter exercised shall
become entitled to receive any shares of capital stock of the Corporation other
than Preferred Shares, thereafter the number of other shares

                                       15
<PAGE>   19

so receivable upon exercise of any Right shall be subject to adjustment from
time to time in a manner and on terms as nearly equivalent as practicable to the
provisions with respect to the Preferred Shares contained in Section 11(a)
through (c), inclusive, and the provisions of Sections 7, 9, 10, 13 and 14 with
respect to the Preferred Shares shall apply on like terms to any such other
shares.

         (g)      All Rights originally issued by the Corporation subsequent to
any adjustment made to the Purchase Price hereunder shall evidence the right to
purchase, at the adjusted Purchase Price, the number of one one-thousandths of a
Preferred Share purchasable from time to time hereunder upon exercise of the
Rights, all subject to further adjustment as provided herein.

         (h)      The Corporation may elect on or after the date of any
adjustment of the Purchase Price to adjust the number of Rights, in lieu of any
adjustment in the number of one one-thousandths of a Preferred Share purchasable
upon the exercise of a Right. Each of the Rights outstanding after such
adjustment of the number of Rights shall be exercisable for the number of one
one-thousandths of a Preferred Share for which a Right was exercisable
immediately prior to such adjustment. Each Right held of record prior to such
adjustment of the number of Rights shall become that number of Rights
(calculated to the nearest one one-thousandth) obtained by dividing the Purchase
Price in effect immediately prior to adjustment of the Purchase Price by the
Purchase Price in effect immediately after adjustment of the Purchase Price. The
Corporation shall make a public announcement of its election to adjust the
number of Rights, indicating the record date for the adjustment, and, if known
at the time, the amount of the adjustment to be made with prompt notice thereof
to the Rights Agent. This record date may be the date on which the Purchase
Price is adjusted or any day thereafter, but, if the Right Certificates have
been issued, shall be at least ten (10) days later than the date of the public
announcement. If Right Certificates have been issued, upon each adjustment of
the number of Rights pursuant to this Section 11(h), the Corporation shall, as
promptly as practicable, cause to be distributed to holders of record of Right
Certificates on such record date Right Certificates evidencing, subject to
Section 14 hereof, the additional Rights to which such holders shall be entitled
as a result of such adjustment, or, at the option of the Corporation, shall
cause to be distributed to such holders of record in substitution and
replacement for the Right Certificates held by such holders prior to the date of
adjustment, and upon surrender thereof, if required by the Corporation, new
Right Certificates evidencing all the Rights to which such holders shall be
entitled after such adjustment. Right Certificates so to be distributed shall be
issued, executed and countersigned in the manner provided for herein and shall
be registered in the names of the holders of record of Right Certificates on the
record date specified in the public announcement.

         (i)      Irrespective of any adjustment or change in the Purchase Price
or the number of one one-thousandths of a Preferred Share issuable upon the
exercise of the Rights, the Right Certificates theretofore and thereafter issued
may continue to express the Purchase Price and the number of one one-thousandths
of a Preferred Share which were expressed in the initial Right Certificates
issued hereunder.

                                       16
<PAGE>   20
         (j)      Before taking any action that would cause an adjustment
reducing the Purchase Price below the then par value, if any, of the number of
one one-thousandths of a Preferred Share, Common Shares or other securities
issuable upon exercise of the Rights, the Corporation shall take any corporate
action which may, in the opinion of its counsel, be necessary in order that the
Corporation may validly and legally issue such number of fully paid and
non-assessable one one-thousandths of a Preferred Share, Common Shares or other
securities at such adjusted Purchase Price.

         (k)      In any case in which this Section 11 shall require that an
adjustment in the Purchase Price be made effective as of a record date for a
specified event, the Corporation may elect to defer with prompt notice thereof
to the Rights Agent until the occurrence of such event the issuance to the
holder of any Right exercised after such record date the Preferred Shares,
Common Shares or other securities of the Corporation, if any, issuable upon such
exercise over and above the Preferred Shares, Common Shares or other securities
of the Corporation, if any, issuable upon exercise on the basis of the Purchase
Price in effect prior to such adjustment; provided, however, that the
Corporation shall deliver to such holder a due bill or other appropriate
instrument evidencing such holder's right to receive such additional shares upon
the occurrence of the event requiring such adjustment.

         (l)      Anything in this Section 11 to the contrary notwithstanding,
the Corporation shall be entitled to make such reductions in the Purchase Price,
in addition to those adjustments expressly required by this Section 11, as and
to the extent that it in its sole discretion shall determine to be advisable in
order that (i) any consolidation or subdivision of the Preferred Shares, (ii)
issuance wholly for cash of Preferred Shares at less than the current market
price, (iii) issuance wholly for cash of Preferred Shares or securities which by
their terms are convertible into or exchangeable for Preferred Shares, (iv)
stock dividends or (v) issuance of rights, options or warrants referred to in
this Section 11, hereafter made by the Corporation to holders of its Preferred
Shares shall not be taxable to such stockholders.

         (m)      The Corporation covenants and agrees that it shall not, at any
time after the Distribution Date, (i) consolidate with any other Person (other
than a Subsidiary of the Corporation in a transaction which does not violate
Section 11(n) hereof), (ii) merge with or into any other Person (other than a
Subsidiary of the Corporation in a transaction which does not violate Section
11(n) hereof), or (iii) sell or transfer (or permit any Subsidiary to sell or
transfer), in one transaction, or a series of related transactions, assets or
earning power aggregating more than 50% of the assets or earning power of the
Corporation and its Subsidiaries (taken as a whole) to any other Person or
Persons (other than the Corporation and/or any of its Subsidiaries in one or
more transactions each of which does not violate Section 11(n) hereof), if (x)
at the time of or immediately after such consolidation, merger, sale or transfer
there are any charter or by-law provisions or any rights, warrants or other
instruments or securities outstanding or agreements in effect or other actions
taken, which would materially diminish or otherwise eliminate the benefits
intended to be afforded by the Rights or (y) prior to, simultaneously with or
immediately after such consolidation, merger or sale, the stockholders of the
Person who constitutes, or would constitute, the "Principal Party" for purposes
of Section 13(a) hereof shall have received a distribution of Rights previously
owned by such Person or any of its Affiliates and Associates. The Corporation
shall not consummate any such consolidation, merger, sale or

                                       17
<PAGE>   21

transfer unless prior thereto the Corporation and such other Person shall have
executed and delivered to the Rights Agent a supplemental agreement evidencing
compliance with this Section 11(m).

         (n)      The Corporation covenants and agrees that, after the
Distribution Date, it will not, except as permitted by Section 23 or Section 27
hereof, take (or permit any Subsidiary to take) any action the purpose of which
is to, or if at the time such action is taken it is reasonably foreseeable that
the effect of such action is to, materially diminish or otherwise eliminate the
benefits intended to be afforded by the Rights.

         (o)      The exercise of Rights under Section 11(a)(ii) shall only
result in the loss of rights under Section 11(a)(ii) to the extent so exercised
and shall not otherwise affect the rights represented by the Rights under this
Rights Agreement, including the rights represented by Section 13.

         Section  12.      Certificate of Adjusted Purchase Price or Number of
Shares. Whenever an adjustment is made as provided in Sections 11 or 13 hereof,
the Corporation shall promptly (a) prepare a certificate setting forth such
adjustment, and a brief statement of the facts and computations accounting for
such adjustment, (b) file with the Rights Agent and with each transfer agent for
the Common Shares and the Preferred Shares a copy of such certificate and (c)
mail a brief summary thereof to each holder of a Right Certificate in accordance
with Section 26 hereof. The Rights Agent shall be fully protected in relying on
any such certificate and on any adjustment therein contained and shall have no
duty with respect to and shall not be deemed to have knowledge of such
adjustment unless and until it shall have received such certificate.

         Section  13.      Consolidation, Merger or Sale or Transfer of
Assets or Earning Power. (a) In the event that, on or following the Shares
Acquisition Date, directly or indirectly, (x) the Corporation shall consolidate
with, or merge with and into, any Interested Stockholder or, if in such merger
or consolidation all holders of Common Stock are not treated alike, any other
Person, (y) the Corporation shall consolidate with, or merge with, any
Interested Stockholder or, if in such merger or consolidation all holders of
Common Stock are not treated alike, any other Person, and the Corporation shall
be the continuing or surviving corporation of such consolidation or merger
(other than, in a case of any transaction described in (x) or (y), a merger or
consolidation which would result in all of the securities generally entitled to
vote in the election of directors ("voting securities") of the Corporation
outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into securities of the surviving
entity) all of the voting securities of the Corporation or such surviving entity
outstanding immediately after such merger or consolidation and the holders of
such securities not having changed as a result of such merger or consolidation),
or (z) the Corporation shall sell or otherwise transfer (or one or more of its
Subsidiaries shall sell or otherwise transfer), in one transaction or a series
of related transactions, assets or earning power aggregating more than 50% of
the assets or earning power of the Corporation and its Subsidiaries (taken as a
whole) to any Interested Stockholder or Stockholders or, if in such transaction
all holders of Common Stock are not treated alike, any other Person (other than
the Corporation or any Subsidiary of the Corporation in one or more transactions
each of which does not violate Section 11(n) hereof), then, and in each such
case (except as provided in Section 13(d) hereof), proper

                                       18
<PAGE>   22

provision shall be made so that (i) each holder of a Right, except as provided
in Section 7(e) hereof, shall thereafter have the right to receive, upon the
exercise thereof at a price equal to the then current Purchase Price, in
accordance with the terms of this Agreement and in lieu of Preferred Shares,
such number of freely tradeable Common Shares of the Principal Party (as
hereinafter defined), not subject to any liens, encumbrances, rights of first
refusal or other adverse claims, as shall equal the result obtained by (A)
multiplying the then current Purchase Price by the number of one one-thousandths
of a Preferred Share for which a Right is then exercisable (without taking into
account any adjustment previously made pursuant to Section 11(a)(ii)) and
dividing that product by (B) 50% of the then current per share market price of
the Common Shares of such Principal Party (determined pursuant to Section 11(d)
hereof) on the date of consummation of such Section 13 Event; (ii) such
Principal Party shall thereafter be liable for, and shall assume, by virtue of
such Section 13 Event, all the obligations and duties of the Corporation
pursuant to this Agreement; (iii) the term "Corporation" shall thereafter be
deemed to refer to such Principal Party, it being specifically intended that the
provisions of Section 11 hereof shall apply only to such Principal Party
following the first occurrence of a Section 13 Event; and (iv) such Principal
Party shall take such steps (including, but not limited to, the reservation of a
sufficient number of its Common Shares) in connection with the consummation of
any such transaction as may be necessary to assure that the provisions hereof
shall thereafter be applicable, as nearly as reasonably may be, in relation to
the Common Shares thereafter deliverable upon the exercise of the Rights.

         (b)      "Principal Party" shall mean

                  (i)      in the case of any transaction described in clause
(x) or (y) of the first sentence of Section 13(a), the Person that is the issuer
of any securities into which Common Shares of the Corporation are converted in
such merger or consolidation, and if no securities are so issued, the Person
that is the other party to such merger or consolidation (including, if
applicable, the Corporation if it is the surviving corporation); and

                  (ii)     in the case of any transaction described in clause
(z) of the first sentence of Section 13(a), the Person that is the party
receiving the greatest portion of the assets or earning power transferred
pursuant to such transaction or transactions; provided, however, that in any of
the foregoing cases, (1) if the Common Shares of such Person are not at such
time and have not been continuously over the preceding twelve (12) month period
registered under Section 12 of the Exchange Act, and such Person is a direct or
indirect Subsidiary of another Person the Common Shares of which are and have
been so registered, "Principal Party" shall refer to such other Person; (2) in
case such Person is a Subsidiary, directly or indirectly, of more than one
Person, the Common Shares of two or more of which are and have been so
registered, "Principal Party" shall refer to whichever of such Persons is the
issuer of the Common Shares having the greatest aggregate market value; and (3)
in case such Person is owned, directly or indirectly, by a joint venture formed
by two or more Persons that are not owned, directly or indirectly, by the same
Person, the rules set forth in (1) and (2) above shall apply to each of the
chains of ownership having an interest in such joint venture as if such party
were a "Subsidiary" of both or all of such joint venturers and the Principal
Parties in each such chain shall bear the obligations set forth in this Section
13 in the same ratio as their direct or indirect interests in such Person bear
to the total of such interests.

                                       19
<PAGE>   23

                  (c)      The Corporation shall not consummate any such
consolidation, merger, sale or transfer unless the Principal Party shall have a
sufficient number of its authorized Common Shares which have not been issued or
reserved for issuance to permit the exercise in full of the Rights in accordance
with this Section 13 and unless prior thereto the Corporation and such Principal
Party shall have executed and delivered to the Rights Agent a supplemental
agreement providing for the terms set forth in paragraphs (a) and (b) of this
Section 13 and further providing that, as soon as practicable after the date of
any consolidation, merger, sale or transfer mentioned in paragraph (a) of this
Section 13, the Principal Party at its own expense shall:

                  (i)      prepare and file a registration statement under the
Act with respect to the Rights and the securities purchasable upon exercise of
the Rights on an appropriate form, and will use its best efforts to cause such
registration statement to (A) become effective as soon as practicable after such
filing and (B) remain effective (with a prospectus at all times meeting the
requirements of the Act) until the Final Expiration Date;

                  (ii)     use its best efforts to qualify or register the
Rights and the securities purchasable upon exercise of the Rights under the blue
sky laws of such jurisdictions as may be necessary or appropriate; and

                  (iii)    deliver to holders of the Rights historical financial
statements for the Principal Party which comply in all respects with the
requirements for registration on Form 10 under the Exchange Act.

         The provisions of this Section 13 shall similarly apply to successive
mergers or consolidations or sales or other transfers. The rights under this
Section 13 shall be in addition to the rights to exercise Rights and adjustments
under Section 11 (a)(ii) and shall survive any exercise thereof.

                  (d)      Notwithstanding anything in this Agreement to the
contrary, Section 13 shall not be applicable to a transaction described in
subparagraphs (x) and (y) of Section 13(a) if: (i) such transaction is
consummated with a Person or Persons who acquired Common Shares pursuant to a
Permitted Offer (or a wholly owned Subsidiary of any such Person or Persons);
(ii) the price per Common Share offered in such transaction is not less than the
price per Common Share paid to all holders of Common Shares whose shares were
purchased pursuant to such Permitted Offer; and (iii) the form of consideration
offered in such transaction is the same as the form of consideration paid
pursuant to such Permitted Offer. Upon consummation of any such transaction
contemplated by this Section 13(d), all Rights hereunder shall expire.

         Section  14.      Fractional Rights and Fractional Shares. (a) The
Corporation shall not be required to issue fractions of Rights or to distribute
Right Certificates which evidence fractional Rights. In lieu of such fractional
Rights, there shall be paid to the registered holders of the Right Certificates
with regard to which such fractional Rights would otherwise be issuable, an
amount in cash equal to the same fraction of the current market value of a whole
Right. For the purposes of this Section 14(a), the current market value of a
whole Right shall be the closing price of the Rights for the Trading Day
immediately prior to the date on which such fractional Rights would

                                       20
<PAGE>   24

have been otherwise issuable. The closing price for any day shall be the last
sale price, regular way, or, in case no such sale takes place on such day, the
average of the closing bid and asked prices, regular way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities listed or admitted to trading on the New York Stock Exchange or,
if the Rights are not listed or admitted to trading on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national securities exchange
on which the Rights are listed or admitted to trading or, if the Rights are not
listed or admitted to trading on any national securities exchange, the last
quoted price or, if not so quoted, the average of the high bid and low asked
prices in the over-the-counter market, as reported by NASDAQ or such other
system then in use or, if on any such date the Rights are not quoted by any such
organization, the average of the closing bid and asked prices as furnished by a
professional market maker making a market in the Rights selected by the Board of
Directors of the Corporation. If on any such date no such market maker is making
a market in the Rights, the fair value of the Rights on such date as determined
in good faith by the Board of Directors of the Corporation shall be used.

         (b)      The Corporation shall not be required to issue fractions of
Preferred Shares (other than fractions which are one one-thousandth or integral
multiples of one one-thousandth of a Preferred Share) upon exercise of the
Rights or to distribute certificates which evidence fractional Preferred Shares
(other than fractions which are one one-thousandth or integral multiples of one
one-thousandth of a Preferred Share). Fractions of Preferred Shares in integral
multiples of one one-thousandth of a Preferred Share may, at the election of the
Corporation, be evidenced by depositary receipts, pursuant to an appropriate
agreement between the Corporation and a depositary selected by it; provided that
such agreement shall provide that the holders of such depositary receipts shall
have the rights, privileges and preferences to which they are entitled as
beneficial owners of the Preferred Shares represented by such depository
receipts. In lieu of fractional Preferred Shares that are not one one-thousandth
or integral multiples of one one-thousandth of a Preferred Share, the
Corporation shall pay to the registered holders of Right Certificates at the
time such Rights are exercised as herein provided an amount in cash equal to the
same fraction of the current market value of one Preferred Share. For the
purposes of this Section 14(b), the current market value of a Preferred Share
shall be the closing price of a Preferred Share (as determined pursuant to
Section 11(d)(ii) hereof) for the Trading Day immediately prior to the date of
such exercise.

                                       21
<PAGE>   25

         (c)      Following the occurrence of one of the transactions or events
specified in Section 11 giving rise to the right to receive Common Shares,
capital stock equivalents (other than Preferred Shares) or other securities upon
the exercise of a Right, the Corporation shall not be required to issue
fractions of shares or units of such Common Shares, capital stock equivalents or
other securities upon exercise of the Rights or to distribute certificates which
evidence fractions of such Common Shares, capital stock equivalents or other
securities. In lieu of fractional shares or units of such Common Shares, capital
stock equivalents or other securities, the Corporation may pay to the registered
holders of Right Certificates at the time such Rights are exercised as herein
provided an amount in cash equal to the same fraction of the current market
value of a share or unit of such Common Shares, capital stock equivalents or
other securities. For purposes of this Section 14(c), the current market value
shall be determined in the manner set forth in Section 11(d) hereof for the
Trading Day immediately prior to the date of such exercise and, if such capital
stock equivalent is not traded, each such capital stock equivalent shall have
the value of one one-thousandth of a Preferred Share.

         (d)      The holder of a Right by the acceptance of the Right expressly
waives his right to receive any fractional Rights or any fractional share upon
exercise of a Right (except as provided above).

         Section 15.       Rights of Action. All rights of action in respect of
this Agreement, excepting the rights of action given to the Rights Agent under
this Agreement, are vested in the respective registered holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Shares), without the consent of the Rights
Agent or of the holder of any other Right Certificate (or, prior to the
Distribution Date, of the Common Shares), may, in his own behalf and for his own
benefit, enforce, and may institute and maintain any suit, action or proceeding
against the Corporation to enforce, or otherwise act in respect of, his right to
exercise the Rights evidenced by such Right Certificate in the manner provided
in such Right Certificate and in this Agreement. Without limiting the foregoing
or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and will be entitled to specific performance of
the obligations under, and injunctive relief against actual or threatened
violations of the obligations of any Person subject to, this Agreement.

         Section 16.       Agreement of Right Holders. Every holder of a Right,
by accepting the same, consents and agrees with the Corporation and the Rights
Agent and with every other holder of a Right that:

         (a)      prior to the Distribution Date, the Rights wilt be
transferable only in connection with the transfer of the Common Shares;

         (b)      after the Distribution Date, the Right Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the principal office or offices of the Rights Agent designated for such purpose,
duly endorsed or accompanied by a proper instrument of transfer and with the
appropriate form fully executed;

                                       22
<PAGE>   26

         (c)      subject to Section 6 and Section 7(f) hereof, the Corporation
and the Rights Agent may deem and treat the person in whose name the Right
Certificate (or, prior to the Distribution Date, the associated Common Shares
certificate) is registered as the absolute owner thereof and of the Rights
evidenced thereby (notwithstanding any notations of ownership or writing on the
Right Certificate or the associated Common Shares certificate made by anyone
other than the Corporation or the Rights Agent) for all purposes whatsoever, and
neither the Corporation nor the Rights Agent, subject to the last sentence of
Section 7(e) hereof, shall be required to be affected by any notice to the
contrary; and

         (d)      notwithstanding anything in this Agreement to the contrary,
neither the Corporation nor the Rights Agent shall have any liability to any
holder of a Right or a beneficial interest in a Right or other Person as a
result of its inability to perform any of its obligations under this Agreement
by reason of any preliminary or permanent injunction or other order, decree or
ruling issued by a court of competent jurisdiction or by a governmental,
regulatory or administrative agency or commission, or any statute, rule,
regulation or executive order promulgated or enacted by any governmental
authority, prohibiting or otherwise restraining performance of such obligation;
provided, however, the Corporation must use its best efforts to have any such
order, decree or ruling lifted or otherwise overturned as soon as possible.

         Section  17.      Right Certificate Holder Not Deemed a Stockholder. No
holder, as such, of any Right Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Preferred Shares or any
other securities of the Corporation which may at any time be issuable on the
exercise of the Rights represented thereby, nor shall anything contained herein
or in any Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a stockholder of the Corporation or
any right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 25 hereof), or to receive dividends
or other distributions or to exercise any preemptive or subscription rights, or
otherwise, until the Right or Rights evidenced by such Right Certificate shall
have been exercised in accordance with the provisions hereof.

         Section 18.       Concerning the Rights Agent and Indemnities. The
Corporation agrees to pay to the Rights Agent reasonable compensation for all
services rendered by it hereunder and, from time to time, on demand of the
Rights Agent, its reasonable expenses and counsel fees and other disbursements
incurred in the administration, preparation, delivery, amendment and execution
of this Agreement and the exercise and performance of its duties hereunder.

         The Corporation also agrees to defend, indemnify and hold harmless
Rights Agent, its affiliated and related companies, and their respective
officers, directors, employees, agents, successors and assigns ("Agent
Indemnified Parties") from and against any losses, claims, damages or
liabilities, injuries, causes of action, demands and expenses (including
reasonable attorney's fees and expense of litigation) ("Loss"), to which Rights
Agent, may become subject, insofar as such Losses arise out of, or in connection
with, the performance of services under this Agreement. The Corporation will
not, however, indemnify or be responsible for any Loss, to the extent that such
Loss, as determined by a court of competent jurisdiction or as agreed to by the

                                       23
<PAGE>   27

parties, negligence, gross negligence, bad faith or willful misconduct of any
Agent Indemnified Parties.

         Further, Rights Agent shall defend, indemnify, and hold harmless The
Corporation, its affiliated and related corporations, and their respective
officers, directors, employees, agents, successors, and assigns ("Southern
Energy Indemnified Parties") from and against any Loss to the extent that such
Loss, as determined by a court of competent jurisdiction or as agreed to by the
parties, resulted from the negligence or willful misconduct of the Rights Agent
or its affiliates or related companies or their respective directors, officers,
employees or agents. In addition, Rights Agent shall, at its expense, defend,
indemnify, and hold harmless the Southern Energy Indemnified Parties from any
and all claims of any kind that any services provided under this Agreement
infringe any patent or copyright.

         Promptly after receipt by an Agent Indemnified Party or a Southern
Energy Indemnified Party (each an "Indemnified Party") of written notice of any
loss, claim, damage or liability in respect of which indemnity may be sought by
it hereunder, the Indemnified Party will, if a claim is to be made against the
indemnifying party, notify the indemnifying party thereof in writing.
Thereafter, the Indemnified Party and the indemnifying party shall consult, to
the extent appropriate, with a view to minimizing the cost to the indemnifying
party of its obligations hereunder. In case the Indemnified Party receives
written notice of any loss, claim, damage or liability in respect of which
indemnity may be sought by it hereunder and it notifies the indemnifying party
thereof, the indemnifying party will be entitled to participate therein, and to
the extent that it may elect by written notice delivered to the Indemnified
Party promptly after receiving the aforesaid notice from the Indemnified Party,
to assume the defense thereof with counsel reasonably satisfactory to the
Indemnified Party; provided, however, that if the parties against whom any loss,
claim, damage or liability arises include both the Indemnified Party and the
indemnifying party and the Indemnified Party shall have reasonably concluded
that defenses available to it conflict with defenses available to the
indemnifying party, the Indemnified Party shall have the right to select one
separate counsel to assume such legal defenses and otherwise to participate in
the defense of such loss, claim, damage or liability on behalf of the
Indemnified Party. In such event, the Indemnified Party shall instruct such
counsel to cooperate with counsel for the indemnifying party to the fullest
extent permitted by applicable standards of professional responsibility. Upon
receipt by the Indemnified Party of notice from the indemnifying party of its
election so to assume the defense of such loss, claim, damage or liability and
approval by the Indemnified Party of counsel, the indemnifying party shall not
be liable to the Indemnified Party under this Section 18 for any legal or other
expenses subsequently incurred by the Indemnified Party in connection with the
defense thereof unless (i) the Indemnified Party shall have employed such
counsel in connection with the assumption of legal defenses in accordance with
the proviso to the second preceding sentence, (ii) the indemnifying party shall
not have employed and continued to employ counsel reasonably satisfactory to the
Indemnified Party to represent the Indemnified Party within a reasonable time
after notice of commencement of the action or (iii) the indemnifying party shall
have authorized in writing the employment of separate counsel for the
Indemnified Party at the expense of the indemnifying party. The indemnifying
party will not be liable hereunder to the Indemnified Party for any settlement
or compromise of or consent to the entry of any judgment in any pending or
threatened claim, action, suit or proceeding in respect of which indemnification
may be sought hereunder unless the indemnifying party shall

                                       24
<PAGE>   28

have given its prior written consent thereto. The indemnifying party shall not,
without prior written consent of the Indemnified Party, effect any settlement of
any pending or threatened action in respect of which the Indemnified Party is or
is entitled or subject to a party and the Indemnified Party is entitled to
indemnity hereunder unless such settlement includes an unconditional release of
the Indemnified Party from all liability on any claims that are the subject
matter of such action.

         Notwithstanding anything to the contrary herein, neither party shall be
liable for consequential, punitive, special or indirect damages of any kind
whatsoever (including, but not limited to, lost profits)("Consequential
Damages") even if that party has been advised of such damages, provided however
that this limitation shall not apply to:

         (a)      The Corporation's obligation to indemnify Agent Indemnified
Parties under this Section 18 to the extent that a third party recovers such
Consequential Damages from an Agent Indemnified Party (only to the extent of
such third party recovery) except that this proviso shall not apply to the
extent such Consequential Damages resulted from the gross negligence or willful
misconduct of an Agent Indemnified Party (as determined by a court of competent
jurisdiction or as otherwise finally agreed); and

         (b)      Rights Agent's obligation to indemnify Southern Energy
Indemnified Parties under this Section 18 to the extent that a third party
recovers such Consequential Damages from a Southern Energy Indemnified Party and
only:

                  (i)      to the extent of such third party recovery; and

                  (ii)     to the extent such Consequential Damages resulted
                           from the gross negligence or willful misconduct of an
                           Agent Indemnified Party (as determined by a court of
                           competent jurisdiction or as otherwise finally
                           agreed).

         In the absence of negligence, gross negligence, bad faith, willful or
intentional misconduct on its (or its officers', directors', employees',
agents', successors' and assigns') part, Rights Agent shall not be liable for
any action taken, suffered, or omitted by it or for any error of judgment made
by it in the performance of its duties under this Agreement.

         Rights Agent shall be protected and shall incur no liability for, or in
respect of, any action taken, suffered or omitted by it in connection with, its
administration of this Agreement in reliance upon any Right Certificate or
certificate for Common Shares or for other securities of the Corporation,
instrument of assignment or transfer, power of attorney, endorsement, affidavit,
letter, notice, direction, consent, certificate, statement, or other paper or
document believed by it to be genuine and to be signed, executed and, where
necessary, verified or acknowledged, by the proper Person or Persons.

         Section 19.       Merger or Consolidation or Change of Name of Rights
Agent. Any Person into which the Rights Agent or any successor Rights Agent may
be merged or with which it may be consolidated, or any Person resulting from any
merger or consolidation to which the Rights

                                       25
<PAGE>   29

Agent or any successor Rights Agent shall be a party, or any Person succeeding
to the stock transfer or all or substantially all of the shareholder services
business of the Rights Agent or any successor Rights Agent, shall be the
successor to the Rights Agent under this Agreement without the execution or
filing of any paper or any further act on the part of any of the parties hereto,
provided that such Person would be eligible for appointment as a successor
Rights Agent under the provisions of Section 21 hereof. In case at the time such
successor Rights Agent shall succeed to the agency created by this Agreement,
any of the Right Certificates shall have been countersigned but not delivered,
any such successor Rights Agent may adopt the countersignature of a predecessor
Rights Agent and deliver such Right Certificates so countersigned; and in case
at that time any of the Right Certificates shall not have been countersigned,
any successor Rights Agent may countersign such Right Certificates either in the
name of the predecessor or in the name of the successor Rights Agent; and in all
such cases such Right Certificates shall have the full force provided in the
Right Certificates and in this Agreement.

         In case at any time the name of the Rights Agent shall be changed and
at such time any of the Right Certificates shall have been countersigned but not
delivered, the Rights Agent may adopt the countersignature under its prior name
and deliver Right Certificates so countersigned; and in case at that time any of
the Right Certificates shall not have been countersigned, the Rights Agent may
countersign such Right Certificates either in its prior name or in its changed
name; and in all such cases such Right Certificates shall have the full force
provided in the Right Certificates and in this Agreement.

         Section 20.       Duties of Rights Agent. The Rights Agent undertakes
only those duties and obligations expressly imposed by this Agreement upon the
following terms and conditions, by all of which the Corporation and the holders
of Right Certificates, by their acceptance thereof, shall be bound:

         (a)      The Rights Agent may consult with legal counsel (who may be
legal counsel for the Corporation), and the advice or opinion of such counsel
shall be full and complete authorization and protection to the Rights Agent as
to any action taken, suffered or omitted by it in good faith and in accordance
with such advice or opinion.

         (b)      Whenever in the performance of its duties under this Agreement
the Rights Agent shall deem it necessary or desirable that any fact or matter
(including, without limitation, the identity of an Acquiring Person and the
determination of the current market price of any Security) be proved or
established by the Corporation prior to taking, suffering or omitting any action
hereunder, such fact or matter (unless other evidence in respect thereof be
herein specifically prescribed) may be deemed to be conclusively proved and
established by a certificate signed by any one of the Chairman of the Board, the
Chief Executive Officer, the President, any Vice President, the Treasurer or the
Secretary of the Corporation and delivered to the Rights Agent; and such
certificate shall be full authorization to the Rights Agent and the Rights Agent
shall incur no liability for in respect of for any action taken or suffered or
omitted in good faith by it under the provisions of this Agreement in reliance
upon such certificate.

         (c)      The Rights Agent shall be liable hereunder only for its own
negligence, bad faith or willful misconduct as finally determined.

                                       26
<PAGE>   30

         (d)      The Rights Agent shall not be liable for or by reason of any
of the statements of fact or recitals contained in this Agreement or in the
Right Certificates (except its countersignature on such Right Certificates) or
be required to verify the same, but all such statements and recitals are and
shall be deemed to have been made by the Corporation only.

         (e)      The Rights Agent shall not be under any responsibility in
respect of the validity of this Agreement or the execution and delivery hereof
(except the due execution hereof by the Rights Agent) or in respect of the
validity or execution of any Right Certificate (except its countersignature
thereof); nor shall it be responsible for any breach by the Corporation of any
covenant or condition contained in this Agreement or in any Rights Certificate;
nor shall it be responsible for any change in the exercisability of the Rights
(including the Rights becoming void pursuant to Section 7(e) hereof) or any
adjustment required under the provisions of Section 11 or Section 13 hereof or
responsible for the manner, method or amount of any such adjustment or the
ascertaining of the existence of facts that would require any such adjustment
(except with respect to the exercise of Rights evidenced by Right Certificates
after receipt of the certificate described in Section 12 hereof); nor shall it
by any act hereunder be deemed to make any representation or warranty as to the
authorization or reservation of any Preferred Shares or Common Shares to be
issued pursuant to this Agreement or any Right Certificate or as to whether any
Preferred Shares or Common Shares will, when issued, be validly authorized and
issued, fully paid and non-assessable.

         (f)      The Corporation agrees that it will perform, execute,
acknowledge and deliver or cause to be performed, executed, acknowledged and
delivered all such further and other acts, instruments and assurances as may
reasonably be required by the Rights Agent for the carrying out or performing by
the Rights Agent of the provisions of this Agreement.

         (g)      The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the Chief Executive Officer, the President,
any Vice President, the Treasurer or the Secretary of the Corporation, and to
apply to such officers for advice or instructions in connection with its duties,
and shall not be liable for any action taken, suffered or omitted by it in good
faith or lack of action in accordance with instructions of any such officer or
for any delay in acting while waiting for those instructions. Any application by
the Rights Agent for written instructions from the Corporation may, at the
option of the Rights Agent, set forth in writing any action proposed to be taken
or omitted by the Rights Agent under this Rights Agreement and the date on or
after which such action shall be taken or suffered or such omission shall be
effective. The Rights Agent shall not be liable for any action taken or suffered
by, or omission of, the Rights Agent in accordance with a proposal included in
any such application on or after the date specified in such application (which
date shall not be less than five Business Days after the date any officer of the
Corporation actually receives such application, unless any such officer shall
have consented in writing to an earlier date) unless, prior to taking any such
action (or the effective date in the case of an omission), the Rights Agent
shall have received written instruction in response to such application
specifying the action to be taken or suffered or omitted.

                                       27
<PAGE>   31

         (h)      The Rights Agent and any stockholder, director, Affiliate
officer or employee of the Rights Agent may buy, sell or deal in any of the
Rights or other securities of the Corporation or become pecuniarily interested
in any transaction in which the Corporation may be interested, or contract with
or lend money to the Corporation or otherwise act as fully and freely as though
it were not Rights Agent under this Agreement. Nothing herein shall preclude the
Rights Agent from acting in any other capacity for the Corporation or for any
other Person.

         (i)      The Rights Agent may execute and exercise any of the rights or
powers hereby vested in it or perform any duty hereunder either itself or by or
through its attorneys or agents, and the Rights Agent shall not be answerable or
accountable for any act, default, neglect or misconduct of any such attorneys or
agents or for any loss to the Corporation resulting from any such act, default,
neglect or misconduct, provided reasonable care was exercised in the selection
and continued employment thereof.

         (j)      No provision of this Agreement shall require the Rights Agent
to expend or risk its own funds or otherwise incur any financial liability in
the performance of any of its duties hereunder or in the exercise of its rights
if there shall be reasonable grounds for believing that repayment of such funds
or adequate indemnification against such risk or liability is not reasonably
assured to it.

         (k)      If, with respect to any Rights Certificate surrendered to the
Rights Agent for exercise or transfer, the certificate attached to the form of
assignment or form of election to purchase, as the case may be, has not been
completed, the Rights Agent shall not take any further action with respect to
such requested exercise of transfer without first consulting with the
Corporation.

         Section 21.       Change of Rights Agent. The Rights Agent or any
successor Rights Agent may resign and be discharged from its duties under this
Agreement upon thirty (30) days' notice in writing mailed to the Corporation and
to each transfer agent of the Common Shares or Preferred Shares by registered or
certified mail, and to the holders of the Right Certificates by first-class
mail. The Corporation may remove the Rights Agent or any successor Rights Agent
upon sixty (60) days' notice in writing, mailed to the Rights Agent or successor
Rights Agent, as the case may be, and to each transfer agent of the Common
Shares or Preferred Shares by registered or certified mail, and to holders of
the Right Certificates by first-class mail. If the Rights Agent shall resign or
be removed or shall otherwise become incapable of acting, the Corporation shall
appoint a successor to the Rights Agent. If the Corporation shall fail to make
such appointment within a period of sixty (60) days after giving notice of such
removal or after it has been notified in writing of such resignation or
incapacity by the resigning or incapacitated Rights Agent or by the holder of a
Right Certificate (who shall, with such notice, submit his Right Certificate for
inspection by the Corporation), then the registered holder of any Right
Certificate may apply to any court of competent jurisdiction for the appointment
of a new Rights Agent. Any successor Rights Agent, whether appointed by the
Corporation or by such a court, shall be a Person organized and doing business
under the laws of the United States or of the States of New York or Illinois or
of any other state of the United States so long as such Person is authorized to
do business in the States of New York or Illinois, in good standing which is
authorized under such laws to do business and is subject to supervision or
examination by federal

                                       28
<PAGE>   32

or state authority. After appointment, the successor Rights Agent shall be
vested with the same powers, rights, duties and responsibilities as if it had
been originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment the Corporation shall file
notice thereof in writing with the predecessor Rights Agent and each transfer
agent of the Common Shares or Preferred Shares, and mail a notice thereof in
writing to the registered holders of the Right Certificates. Failure to give any
notice provided for in this Section 21, however, or any defect therein, shall
not affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

         Section 22.       Issuance of New Right Certificates. Notwithstanding
any of the provisions of this Agreement or of the Rights to the contrary, the
Corporation may, at its option, issue new Right Certificates evidencing Rights
in such form as may be approved by its Board of Directors to reflect any
adjustment or change in the Purchase Price and the number or kind or class of
shares or other securities or property purchasable under the Right Certificates
made in accordance with the provisions of this Agreement.

         In addition, in connection with the issuance or sale of Common Shares
following the Distribution Date and prior to the earlier of the Redemption Date
and the Final Expiration Date, the Corporation (a) shall with respect to Common
Shares so issued or sold pursuant to the exercise of stock options or under any
employee plan or arrangement, or upon the exercise, conversion or exchange of
securities, notes or debentures issued by the Corporation, and (b) may, in any
other case, if deemed necessary or appropriate by the Board of Directors of the
Corporation, issue Right Certificates representing the appropriate number of
Rights in connection with such issuance or sale; provided, however, that (i) the
Corporation shall not be obligated to issue any such Right Certificates if, and
to the extent that, the Corporation shall be advised by counsel that such
issuance would create a significant risk of material adverse tax consequences to
the Corporation or the Person to whom such Right Certificate would be issued,
and (ii) no Right Certificate shall be issued if, and to the extent that,
appropriate adjustment shall otherwise have been made in lieu of the issuance
thereof.

         Section 23.       Redemption and Termination.

         (a)(i)   The Board of Directors of the Corporation may, at its
option, redeem all but not less than all the then outstanding Rights at a
redemption price of $.01 per Right, as such amount may be appropriately adjusted
to reflect any stock split, stock dividend or similar transaction occurring
after the date hereof (such redemption price being hereinafter referred to as
the "Redemption Price"), at any time prior to the earlier of (x) the occurrence
of a Section 11(a)(ii) Event, or (y) the Final Expiration Date. The Corporation
may, at its option, pay the Redemption Price either in Common Shares (based on
the "current per share market price," as defined in Section 11(d) hereof, of the
Common Share at the time of redemption) or cash; provided that if the
Corporation elects to pay the Redemption Price in Common Shares, the Corporation
shall not be required to issue any fractional Common Shares and the number of
Common Shares issuable to each holder of Rights shall be rounded down to the
next whole share.

                                       29
<PAGE>   33

         (ii)     In addition, the Board of Directors of the Corporation may, at
its option, at any time following the occurrence of a Section 11(a)(ii) Event
and the expiration of any period during which the holder of Rights may exercise
the rights under Section 11(a)(ii) but prior to any Section 13 Event redeem all
but not less than all of the then outstanding Rights at the Redemption Price (x)
in connection with any merger, consolidation or sale or other transfer (in one
transaction or in a series of related transactions) of assets or earning power
aggregating 50% or more of the earning power of the Corporation and its
subsidiaries (taken as a whole) in which all holders of Common Shares are
treated alike and not involving (other than as a holder of Common Shares being
treated like all other such holders) an Interested Stockholder or (y)(aa) if and
for so long as the Acquiring Person is not thereafter the Beneficial Owner of
15% of the Common Shares, and (bb) at the time of redemption no other Persons
are Acquiring Persons.

         (b)      Notwithstanding the provisions of Section 23(a), in the event
that a majority of the Board of Directors of the Corporation is comprised of (i)
persons elected at a meeting of or by written consent of stockholders who were
not nominated by the Board of Directors in office immediately prior to such
meeting or action by written consent, and/or (ii) successors of such persons
elected to the Board of Directors for the purpose of either facilitating a
Transaction with a Transaction Person or circumventing, directly or indirectly
the provisions of this Section 23(b), then (I) the Rights may not be redeemed
for a period of 180 days following the effectiveness of such election if such
redemption is reasonably likely to have the purpose or effect of facilitating a
Transaction with a Transaction Person and (II) the Rights may not be redeemed
following such 180-day period, if (x) such redemption is reasonably likely to
have the purpose or effect of facilitating a Transaction with a Transaction
Person and (y) during such 180-day period, the Corporation enters into any
agreement, arrangement or understanding with any Transaction Person which is
reasonably likely to have the purpose or effect of facilitating a Transaction
with any Transaction Person.

         (c)      In the case of a redemption permitted under Section 23(a)(i),
immediately upon the date for redemption set forth (or determined in the manner
specified in) in a resolution of the Board of Directors of the Corporation
ordering the redemption of the Rights, evidence of which shall have been filed
with the Rights Agent, and without any further action and without any notice,
the right to exercise the Rights will terminate and the only right thereafter of
the holders of Rights shall be to receive the Redemption Price for each Right so
held. In the case of a redemption permitted only under Section 23(a)(ii),
evidence of which shall have been filed with the Rights Agent, the right to
exercise the Rights will terminate and represent only the right to receive the
Redemption Price upon the later of ten Business Days following the giving of
such notice or the expiration of any period during which, the rights under
Section 11(a)(ii) may be exercised. The Corporation shall promptly give public
notice of any such redemption; provided, however, that the failure to give, or
any defect in, any such notice shall not affect the validity of such redemption.
Within ten (10) days after such date for redemption set forth in a resolution of
the Board of Directors ordering the redemption of the Rights, the Corporation
shall mail a notice of redemption to alt the holders of the then outstanding
Rights at their last addresses as they appear upon the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
transfer agent for the Common Shares. Any notice which is mailed in the manner
herein provided shall be deemed given, whether or not the holder receives the
notice.

                                       30
<PAGE>   34

Each such notice of redemption will state the method by which the payment of the
Redemption Price will be made. Neither the Corporation nor any of its Affiliates
or Associates may redeem, acquire or purchase for value any Rights at any time
in any manner other than that specifically set forth in this Section 23 and
other than in connection with the purchase of Common Shares prior to the
Distribution Date.

         (d)      The Corporation may, at its option, discharge all of its
obligations with respect to the Rights by (i) issuing a press release announcing
the manner of redemption of the Rights in accordance with this Agreement and
(ii) mailing payment of the Redemption Price to the registered holders of the
Rights at their last addresses as they appear on the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
Transfer Agent of the Common Shares, and upon such action, all outstanding
Rights and Right Certificates shall be null and void without any further action
by the Corporation.

         Section 24.       Exchange. (a) The Board of Directors of the
Corporation may, at its option, at any time after any Person becomes an
Acquiring Person, exchange all or part of the then outstanding and exercisable
Rights (which shall not include Rights that have become null and void pursuant
to the provisions of Section 7(e) or 11(a)(ii) hereof) for Common Shares of the
Corporation at an exchange ratio of one Common Share per Right, appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date hereof (such exchange ratio being hereinafter referred
to as the "Exchange Ratio"). Notwithstanding the foregoing, the Board of
Directors shall not be empowered to effect such exchange at any time after any
Person (other than the Corporation, any Subsidiary of the Corporation, any
employee benefit plan of the Corporation, or any such Subsidiary, any entity
holding Common Shares for or pursuant to the terms of any such a plan), together
with all Affiliates and Associates of such Person, becomes the Beneficial Owner
of 50% or more of the Common Shares then outstanding.

         (b)      Immediately upon the action of the Board of Directors of the
Corporation ordering the exchange of any Rights pursuant to subsection (a) of
this Section 24 and without any further action and without any notice, the right
to exercise such Rights shall terminate and the only right thereafter of the
holders of such Rights shall be to receive that number of Common Shares equal to
the number of such Rights held by such holder multiplied by the Exchange Ratio.
The Corporation shall promptly give public notice of any such exchange with
prompt notice to the Rights Agent; provided, however, that the failure to give,
or any defect in, such notice shall not affect the validity of such exchange.
The Corporation shall promptly mail a notice of any such exchange to all of the
holders of such Rights at their last addresses as they appear upon the registry
books of the Rights Agent. Any notice which is mailed in the manner herein
provided shall be deemed given, whether or not the holder receives the notice.
Each such notice of exchange will state the method by which the exchange of the
Common Shares for Rights will be effected and, in the event of any partial
exchange, the number of Rights which will be exchanged. Any partial exchange
shall be effected pro rata based on the number of Rights (other than Rights
which have become null and void pursuant to the provisions of Section 7(e) or
11(a)(ii) hereof) held by each holder of Rights.

         (c)      In any exchange pursuant to this Section 24, the Corporation,
at its option, may substitute Preferred Shares (or equivalent preferred shares,
as such term is defined in Section

                                       31
<PAGE>   35

11(b) hereof) for some or all of the Common Shares exchangeable for Rights, at
the initial rate of one one-thousandth of a Preferred Share (or equivalent
preferred share) for each Common Share, as appropriately adjusted to reflect
adjustments in the voting rights of the Preferred Shares pursuant to the terms
thereof, so that the fraction of a Preferred Share delivered in lieu of each
Common Share shall have the same voting rights as one Common Share.

         (d)      In the event that there shall not be sufficient Common Shares
or Preferred Shares issued hut not outstanding or authorized but unissued to
permit any exchange of Rights as contemplated in accordance with this Section
24, the Corporation shall take all such action as may be necessary to authorize
additional Common Shares or Preferred Shares for issuance upon exchange of the
Rights.

         Section 25.       Notice of Certain Events. (a) In case the Corporation
shall propose (i) to pay any dividend payable in stock of any class to the
holders of its Preferred Shares or to make any other distribution to the holders
of its Preferred Shares (other than a regularly quarterly cash dividend), (ii)
to offer to the holders of its Preferred Shares rights or warrants to subscribe
for or to purchase any additional Preferred Shares or shares of stock of any
class or any other securities, rights or options, (iii) to effect any
reclassification of its Preferred Shares (other than a reclassification
involving only the subdivision of outstanding Preferred Shares), (iv) to effect
any consolidation or merger into or with any other Person (other than a
Subsidiary of the Corporation in a transaction which does not violate Section
11(n) hereof), or to effect any sale or other transfer (or to permit one or more
of its Subsidiaries to effect any sale or other transfer) in one or more
transactions, of 50% or more of the assets or earning power of the Corporation
and its Subsidiaries (taken as a whole) to any other Person or Persons (other
than the Corporation and/or any of its Subsidiaries in one or more transactions
each of which does not violate Section 11(n) hereof), or (v) to effect the
liquidation, dissolution or winding up of the Corporation, then, in each such
case, the Corporation shall give to each holder of a Right Certificate and the
Rights Agent, in accordance with Section 26 hereof, a notice of such proposed
action to the extent feasible and file a certificate with the Rights Agent to
that effect, which shall specify the record date for the purposes of such stock
dividend, or distribution of rights or warrants, or the date on which such
reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the Preferred Shares, if any such date is to be fixed,
and such notice shall be so given in the case of any action covered by clause
(i) or(ii) above at least twenty (20) days prior to the record date for
determining holders of the Preferred Shares for purposes of such action, and in
the case of any such other action, at least twenty (20) days prior to the date
of the taking of such proposed action or the date of participation therein by
the holders of the Preferred Shares, whichever shall be the earlier.

         (b)      In case of a Section 11(a)(ii) Event, then (i) the Corporation
shall as soon as practicable thereafter give to each holder of a Right
Certificate and the Rights Agent, in accordance with Section 26 hereof, a notice
of the occurrence of such event, which notice shall describe such event and the
consequences of such event to holders of Rights under Section 11(a)(ii) hereof,
and (ii) all references in the preceding paragraph (a) to Preferred Shares shall
be deemed thereafter to refer also to Common Shares and/or, if appropriate,
other securities of the Corporation.

                                       32
<PAGE>   36

         Section 26.       Notices. Notices or demands authorized by this
Agreement to be given or made by the Rights Agent or by the holder of any Right
Certificate to or on the Corporation shall be sufficiently given or made if sent
by first-class mail, postage prepaid, addressed (until another address is filed
in writing with the Rights Agent) as follows:

                           Southern Energy, Inc.
                           900 Ashwood Parkway, Suite 500
                           Atlanta, Georgia 30338
                           Attention:  General Counsel

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Corporation or by the holder of any
Right Certificate to or on the Rights Agent shall be sufficiently given or made
if sent by first-class mail, postage prepaid, addressed (until another address
is filed in writing with the Corporation) as follows:

                    ChaseMellon Shareholder Services, L.L.C.
                    85 Challenger Road
                    Ridgefield Park, New Jersey 07660
                    Attention: Daniel Egan

Notices or demands authorized by this Agreement to be given or made by the
Corporation or the Rights Agent to the holder of any Right Certificate or, if
prior to the Distribution Date, to the holder of certificates representing
Common Shares shall be sufficiently given or made if sent by first-class mail,
postage prepaid, addressed to such holder at the address of such holder as shown
on the registry books of the Corporation.

         Section 27.       Supplements and Amendments. Prior to the Distribution
Date, the Corporation and the Rights Agent shall, if the Corporation so directs
in writing, supplement or amend any provision of this Agreement without the
approval of any holders of certificates representing Common Shares. From and
after the Distribution Date, the Corporation and the Rights Agent shall, if the
Corporation so directs in writing, supplement or amend this Agreement without
the approval of any holders of Right Certificates in order (i) to cure any
ambiguity, (ii) to correct or supplement any provision contained herein which
may be defective or inconsistent with any other provisions herein, (iii) to
shorten or lengthen any time period hereunder or (iv) to change or supplement
the provisions hereunder in any manner which the Corporation may deem necessary
or desirable and which shall not adversely affect the interests of the holders
of Right Certificates (other than an Acquiring Person or an Affiliate or
Associate of an Acquiring Person); provided, however, that this Agreement may
not be supplemented or amended to lengthen, pursuant to clause (iii) of this
sentence, (A) a time period relating to when the Rights may be redeemed at such
time as the Rights are not then redeemable, or (B) any other time period unless
such lengthening is for the purpose of protecting, enhancing or clarifying the
rights of, and/or the benefits to, the holders of Rights. Upon the delivery of a
certificate from an appropriate officer of the Corporation which states that the
proposed supplement or amendment is in compliance

                                       33
<PAGE>   37

with the terms of this Section 27, the Rights Agent shall execute such
supplement or amendment, provided that such supplement or amendment does not
change or increase the Rights Agent's duties, liabilities or obligations under
Section 18 or Section 20 of this Agreement Prior to the Distribution Date, the
interests of the holders of Rights shall be deemed coincident with the interests
of the holders of Common Shares. Notwithstanding anything contained in this
Rights Agreement to the contrary, in the event that a majority of the Board of
Directors of the Corporation is comprised of (i) persons elected at a meeting of
or by written consent of stockholders and who were not nominated by the Board of
Directors in office immediately prior to such meeting or action by written
consent and/or (ii) successors of such persons elected to the Board of Directors
for the purpose of either facilitating a Transaction with a Transaction Person
or circumventing directly or indirectly the provisions of this Section 27, then
for a period of 180 days following the effectiveness of such action, this Rights
Agreement shall not be amended or supplemented in any manner reasonably likely
to have the purpose or effect of facilitating a Transaction with a Transaction
Person.

         Section 28.       Determination and Actions by the Board of Directors,
etc. The Board of Directors of the Corporation shall have the exclusive power
and authority to administer this Agreement and to exercise all rights and powers
specifically granted to the Board, or the Corporation, or as may be necessary or
advisable in the administration of this Agreement, including, without
limitation, the right and power to (i) interpret the provisions of this
Agreement, and (ii) make all determinations deemed necessary or advisable for
the administration of this Agreement (including, without limitation, a
determination to redeem or not redeem the Rights or to amend the Agreement and
whether any proposed amendment adversely affects the interests of the holders of
Right Certificates). For all purposes of this Agreement, any calculation of the
number of Common Shares or other securities outstanding at any particular time,
including for purposes of determining the particular percentage of such
outstanding Common Shares or any other securities of which any Person is the
Beneficial Owner, shall be made in accordance with the last sentence of Rule
13d-3(d)(l)(i) of the General Rules and Regulations under the Exchange Act as in
effect on the date of this Agreement. All such actions, calculations,
interpretations and determinations (including, for purposes of clause (y) below,
all omissions with respect to the foregoing) which are done or made by the Board
in good faith, shall (x) be final, conclusive and binding on the Corporation,
the Rights Agent, the holders of the Right Certificates and all other parties,
and (y) not subject the Board to any liability to the holders of the Right
Certificates.

         Section 29.       Successors. All the covenants and provisions of this
Agreement by or for the benefit of the Corporation or the Rights Agent shall
bind and inure to the benefit of their respective successors and assigns
hereunder.

         Section 30.       Benefits of this Agreement. Nothing in this Agreement
shall be construed to give to any person or corporation other than the
Corporation, the Rights Agent and the registered holders of the Right
Certificates (and, prior to the Distribution Date, the Common Shares) any legal
or equitable right, remedy or claim under this Agreement; but this Agreement
shall be for the sole and exclusive benefit of the Corporation, the Rights Agent
and the registered holders of the Right Certificates (and, prior to the
Distribution Date, the Common Shares).

                                       34
<PAGE>   38

         Section 31.       Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

         Section 32.       Governing Law. This Agreement, each Right and each
Right Certificate issued hereunder shall be deemed to be a contract made under
the laws of the State of Delaware and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts to
be made and performed entirely within such State.

         Section 33.       Counterparts. This Agreement may be executed in any
number of counterparts and each of such counterparts shall for all purposes be
deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

         Section 34.       Descriptive Headings. Descriptive headings of the
several Sections of this Agreement are inserted for convenience only and shall
not control or affect the meaning or construction of any of the provisions
hereof.

                                       35
<PAGE>   39

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and attested, all as of the date and year first above written.

                                       SOUTHERN ENERGY, INC.

Attest:
By:                                    By:
   ------------------------               ------------------------
Name:                                  Name:
     ----------------------                 ----------------------

Title:                                 Title:
      ---------------------                  ---------------------

                                       CHASEMELLON SHAREHOLDER
                                       SERVICES, L.L.C., as Rights Agent
Attest:
By:                                    By:
   ------------------------               ------------------------
Name:                                  Name:
     ----------------------                 ----------------------

Title:                                 Title:
      ---------------------                  ---------------------

                                       36
<PAGE>   40
                                                                       EXHIBIT A

                         Certificate of Designations of
                            Series A Preferred Stock

                                       of

                              Southern Energy, Inc.

                      (Pursuant to General Corporation Law
                            of the State of Delaware)

         It is hereby certified that:

         1.       The name of the corporation is Southern Energy, Inc.
(hereinafter called the "Corporation");

         2.       The Certificate of Incorporation of the Corporation (the
"Certificate of Incorporation"), is hereby amended so that the designation and
number of shares of the class and series acted upon in the following resolution,
and the relative rights, preferences and limitations of such class and series,
are as stated in such resolution; and

         3.       The following resolution was duly adopted by the Board of
Directors of the Corporation as required by the General Corporation Law of the
State of Delaware at a meeting duly called and held on August 22, 2000;

         RESOLVED, that pursuant to the authority granted to and vested in the
Board of Directors of this Corporation in accordance with the provisions of the
Certificate of Incorporation, the Board of the Certificate of Incorporation, the
Board of Directors hereby creates a series of Series A Preferred Stock, with a
par value of $0.10 per share, of the Corporation and hereby states the
designation and number of shares, and fixes the relative rights, preferences and
limitations thereof (in addition to the provisions set forth in the Certificate
of Incorporation which are applicable to the Preferred Stock of all classes and
series) as follows:

         Series A Preferred Stock

         Section 1.        Designation, Par Value and Amount, The shares of such
series shall be designated as "Series A Preferred Stock" (hereinafter referred
to as "Series A Preferred Stock"), the shares of such series shall be with par
value of $0.10 per share, and the number of shares constituting such series
shall be one million (1,000,000) shares; provided, however, that, if more than a
total of 1,000,000 shares of Series A Preferred Stock shall be issuable upon the
exercise of

                                       37
<PAGE>   41

Rights (the "Rights") issued pursuant to the Rights Agreement, dated as of
August 22, 2000 between the Corporation and ChaseMellon Shareholder Services,
L.L.C., as Rights Agent (as amended from time to time) (the "Rights Agreement"),
the Board of Directors of the Corporation, pursuant to General Corporation Law
of the State of Delaware, shall direct by resolution or resolutions that a
certificate be properly executed, acknowledged and filed providing for the total
number of shares of Series A Preferred Stock authorized to be issued to be
increased (to the extent that the Certificate of Incorporation then permits) to
the largest number of whole shares (rounded up to the nearest whole number)
issuable upon exercise of the Rights.

         Section 2.        Dividends and Distributions.

         (A)      Subject to the prior and superior rights of the holders of any
shares of any series of Preferred Stock ranking prior and superior to the shares
of Series A Preferred Stock with respect to dividends, the holders of shares of
Series A Preferred Stock shall be entitled to receive, when, as and if declared
by the Board of Directors out of assets legally available for the purpose,
quarterly dividends payable in cash on the first business day of March, June,
September and December in each year (each such date being referred to herein as
a "Quarterly Dividend Payment Date"), commencing on the first Quarterly Dividend
Payment Date after the first issuance of a share or fraction of a share of
Series A Preferred Stock, in an amount per share (rounded to the nearest cent)
equal to the greater of (a) $10.00 or (b) subject to the provision for
adjustment hereinafter set forth, 1,000 times the aggregate per share amount of
all cash dividends, and 1,000 times the aggregate per share amount (payable in
kind) of all non-cash dividends or other distributions other than a dividend
payable in shares of Common Stock, par value $0.01 per share, of the Corporation
(the "Common Stock") or a subdivision of the outstanding shares of Common Stock
(by reclassification or otherwise), declared on the Common Stock since the
immediately preceding Quarterly Dividend Payment Date, or, with respect to the
first Quarterly Dividend Payment Date, since the first issuance of any share or
fraction of a share of Series A Preferred Stock.

         (B)      The Corporation shall declare a dividend or distribution on
the Series A Preferred Stock as provided in paragraph (A) above immediately
after it declares a dividend or distribution on the Common Stock (other than a
dividend payable in shares of Common Stock); provided that, in the event no
dividend or distribution shall have been declared on the Common Stock during the
period between any Quarterly Dividend Payment Date and the next subsequent
Quarterly Dividend Payment Date, a dividend of $10.00 per share on the Series A
Preferred Stock shall nevertheless be payable on such subsequent Quarterly
Dividend Payment Date.

         (C)      Dividends shall begin to accrue and be cumulative on
outstanding shares of Series A Preferred Stock from the Quarterly Dividend
Payment Date next preceding the date of issue of such shares of Series A
Preferred Stock, unless the date of issue of such shares is prior to the record
date for the first Quarterly Dividend Payment Date, in which case dividends on
such shares shall begin to accrue from the date of issue of such shares, or
unless the date of issue is a Quarterly Dividend Payment Date or is a date after
the record date for the determination of holders of shares of Series A Preferred
Stock entitled to receive a quarterly dividend and before such Quarterly
Dividend Payment Date, in either of which events such dividends shall begin to

                                       38
<PAGE>   42

accrue and be cumulative from such Quarterly Dividend Payment Date. Accrued but
unpaid dividends shall not bear interest. Dividends paid on the shares of Series
A Preferred Stock in an amount less than the total amount of such dividends at
the time accrued and payable on such shares shall be allocated pro rata on a
share-by-share basis among all such shares at the time outstanding. The Board of
Directors may fix a record date for the determination of holders of shares of
Series A Preferred Stock entitled to receive payment of a dividend or
distribution declared thereon, which record date shall be not more than 30 days
prior to the date fixed for the payment thereof.

         Section 3.        Voting Rights. The holders of shares of Series A
Preferred Stock shall have the following voting rights:

         (A)      Except as provided in paragraph C of this Section 3 and
subject to the provision for adjustment hereinafter set forth, each share of
Series A Preferred Stock shall entitle the holder thereof to one thousand votes
on all matters submitted to a vote of the stockholders of the Corporation.

         (B)      Except as otherwise provided herein or by law, the holders of
shares of Series A Preferred Stock and the holders of shares of Common Stock
shall vote together as one class on all matters submitted to a vote of
stockholders of the Corporation.

         (C)(i)   If, on the date used to determine stockholders of record for
any meeting of stockholders for the election of directors, a default in
preference dividends (as defined in subparagraph (v) below) on the Series A
Preferred Stock shall exist, the holders of the Series A Preferred Stock shall
have the right, voting as a class as described in subparagraph (ii) below, to
elect two directors (in addition to the directors elected by holders of Common
Stock of the Corporation). Such right may be exercised (a) at any meeting of
stockholders for the election of directors or (b) at a meeting of the holders of
shares of Voting Preferred Stock (as hereinafter defined), called for the
purpose in accordance with the By-laws of the Corporation, until all such
cumulative dividends (referred to above) shall have been paid in full or until
non-cumulative dividends have been paid regularly for at least one year.

         (ii)     The right of the holders of Series A Preferred Stock to elect
two directors, as described above, shall be exercised as a class concurrently
with the rights of holders of any other series of Preferred Stock upon which
voting rights to elect such directors have been conferred and are then
exercisable. The Series A Preferred Stock and any additional series of Preferred
Stock which the Corporation may issue and which may provide for the right to
vote with the foregoing series of Preferred Stock are collectively referred to
herein as "Voting Preferred Stock"

         (iii)    Each director elected by the holders of shares of Voting
Preferred Stock shall be referred to herein as a "Preferred Director." A
Preferred Director so elected shall continue to serve as such director for a
term of one year, except that upon any termination of the right of all of such
holders to vote as a class for Preferred Directors, the term of office of such
directors shall terminate. Any Preferred Director may be removed by, and shall
not be removed except by, the

                                       39
<PAGE>   43

vote of the holders of record of a majority of the outstanding shares of Voting
Preferred Stock then entitled to vote for the election of directors, present (in
person or by proxy) and voting together as a single class (a) at a meeting of
the stockholders, or (b) at a meeting of the holders of shares of such Voting
Preferred Stock, called for the purpose in accordance with the By-laws of the
Corporation, or (c) by written consent signed by the holders of a majority of
the then outstanding shares of Voting Preferred Stock then entitled to vote for
the election of directors, taken together as a single class.

         (iv)     So long as a default in any preference dividends on the
Series A Preferred Stock shall exist or the holders of any other series of
Voting Preferred Stock shall be entitled to elect Preferred Directors, (a) any
vacancy in the office of a Preferred Director may be filled (except as provided
in the following clause (b)) by an instrument in writing signed by the remaining
Preferred Director and filed with the Corporation and (b) in the case of the
removal of any Preferred Director, the vacancy may be filled by the vote or
written consent of the holders of a majority of the outstanding shares of Voting
Preferred Stock then entitled to vote for the election of directors, present (in
person or by proxy) and voting together as a single class, at such time as the
removal shall be effected. Each director appointed as aforesaid by the remaining
Preferred Director shall be deemed, for all purposes hereof, to be a Preferred
Director. Whenever (x) no default in preference dividends on the Series A
Preferred Stock shall exist and (y) the holders of other series of Voting
Preferred Stock shall no longer be entitled to elect such Preferred Directors,
then the number of directors constituting the Board of Directors of the
Corporation shall be reduced by two.

         (v)      For purposes hereof, a "default in preference dividends" on
the Series A Preferred Stock shall be deemed to have occurred whenever the
amount of cumulative and unpaid dividends on the Series A Preferred Stock shall
be equivalent to six full quarterly dividends or more (whether or not
consecutive), and, having so occurred, such default shall be deemed to exist
thereafter until, but only until, all cumulative dividends on all shares of the
Series A Preferred Stock then outstanding shall have been paid through the last
Quarterly Dividend Payment Date or until, but only until, non-cumulative
dividends have been paid regularly for at least one year.

         (E)      Except as set forth herein (or as otherwise required by
applicable law), holders of Series A Preferred Stock shall have no general or
special voting rights and their consent shall not be required for taking any
corporate action.

         Section 4.        Certain Restrictions.

         (A)      Whenever quarterly dividends or other dividends or
distributions payable on the Series A Preferred Stock as provided in Section 2
are in arrears, thereafter and until all accrued and unpaid dividends and
distributions, whether or not declared, on shares of Series A Preferred Stock
outstanding shall have been paid in full, the Corporation shall not (i) declare
or pay dividends, or make any other distributions, on any shares of stock
ranking junior (either as to dividends or upon liquidation, dissolution or
winding up) to the Series A Preferred Stock;

                                       40
<PAGE>   44

         (ii)     declare or pay dividends, or make any other distributions,
on any shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Preferred Stock,
except dividends paid ratably on the Series A Preferred Stock and all such
parity stock on which dividends are payable or in arrears in proportion to the
total amounts to which the holders of all such shares are then entitled;

         (iii)    redeem or purchase or otherwise acquire for consideration
(except as provided in (iv) below) shares of any stock ranking junior (either as
to dividends or upon liquidation, dissolution or winding up) to the Series A
Preferred Stock, provided that the Corporation may at any time redeem, purchase
or otherwise acquire shares of any such junior stock in exchange for shares of
any stock of the Corporation ranking junior (either as to dividends or upon
dissolution, liquidation or winding up) to the Series A Preferred Stock;

         (iv)     redeem or purchase or otherwise acquire for consideration any
shares of Series A Preferred Stock, or any shares of stock ranking on a parity
(either as to dividends or upon liquidation, dissolution or winding up) with the
Series A Preferred Stock, except in accordance with a purchase offer made in
writing or by publication (as determined by the Board of Directors) to all
holders of such shares upon such terms as the Board of Directors, after
consideration of the respective annual dividend rates and other relative rights
and preferences of the respective series and classes, shall determine in good
faith will result in fair and equitable treatment among the respective series or
classes.

         (B)      The Corporation shall not permit any subsidiary of the
Corporation to purchase or otherwise acquire for consideration any shares of
stock of the Corporation unless the Corporation could, under paragraph (A) of
this Section 4, purchase or otherwise acquire such shares at such time and in
such manner.

         Section 5.        Reacquired Shares. Any shares of Series A Preferred
Stock purchased or otherwise acquired by the Corporation in any manner
whatsoever shall be retired and cancelled promptly after the acquisition
thereof. All such shares shall upon their cancellation become authorized but
unissued shares of Preferred Stock and may be reissued as part of a new series
of Preferred Stock subject to the conditions and restrictions on issuance set
forth herein, in the Certificate of Incorporation, in any other Certificate of
Amendment creating a series of Preferred Stock or as otherwise required by law.

         Section 6.        Liquidation, Dissolution or Winding Up.

         (A)      Subject to the prior and superior rights of holders of any
shares of any series of Preferred Stock ranking prior and superior to the shares
of Series A Preferred Stock with respect to rights upon liquidation, dissolution
or winding up (voluntary or otherwise), no distribution shall be made to the
holders of shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Series A Preferred Stock unless,
prior thereto, the holders of shares of Series A Preferred Stock shall have
received $10.00 per share, plus an amount equal to accrued and unpaid dividends
and distributions thereon, whether or not declared, to the date of such payment
(the "Series Liquidation Preference"). Following the payment of the

                                       41
<PAGE>   45

full amount of the Series A Liquidation Preference, no additional distributions
shall be made to the holders of shares of Series A Preferred Stock unless, prior
thereto, the holders of shares of Common Stock shall have received an amount per
share (the "Capital Adjustment") equal to the quotient obtained by dividing (i)
the Series A Liquidation Preference by (ii) (such number in clause (ii), the
"Adjustment Number"). Following the payment of the full amount of the Series A
Liquidation Preference and the Capital Adjustment in respect of all outstanding
shares of Series A Preferred Stock and Common Stock, respectively, holders of
Series A Preferred Stock and holders of Common Stock shall receive their ratable
and proportionate share of the remaining assets to be distributed in the ratio
of the Adjustment Number to 1 with respect to such Preferred Stock and Common
Stock, on a per share basis, respectively.

         (B)      In the event, however, that there are not sufficient assets
available to permit payment in full of the Series A Liquidation Preference and
the liquidation preferences of all other series of preferred stock, if any,
which rank on a parity with the Series A Preferred Stock, then such remaining
assets shall be distributed ratably to the holders of Series A Preferred Stock
and the holders of such parity shares in proportion to their respective
liquidation preferences. In the event, however, that there are not sufficient
assets available to permit payment in full of the Capital Adjustment, then such
remaining assets shall be distributed ratably to the holders of Common Stock.

         Section 7.        Consolidation, Merger, etc. In case the Corporation
shall enter into any consolidation, merger, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other stock
or securities, cash and/or any other property, then in any such case the shares
of Series A Preferred Stock shall at the same time be similarly exchanged or
changed in an amount per share (subject to the provision for adjustment
hereinafter set forth) equal to two times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of Common Stock is changed or exchanged.

         Section 8.        No Redemption. The shares of Series A Preferred Stock
shall not be redeemable.

         Section 9.        Ranking. The Series A Preferred Stock shall rank
junior to all other series of the Corporation's Preferred Stock as to the
payment of dividends and the distribution of assets, unless the terms of any
such series shall provide otherwise.

         Section 10.       Amendment. The Certificate of Incorporation of the
Corporation shall not be further amended in any manner which would materially
alter or change the powers, preferences or special rights of the Series A
Preferred Stock so as to affect them adversely without the affirmative vote of
the holders of a majority or more of the outstanding shares of Series A
Preferred Stock, voting separately as a class.

                                       42
<PAGE>   46

         IN WITNESS WHEREOF, this Certificate of Amendment is executed on behalf
of the Corporation by its President and Chief Executive Officer and attested by
its Secretary this 23rd day of August, 2000.

                                              ----------------------------------
                                              [                         ]
                                               -------------------------
                                              [                ]
                                               ----------------
                                                      Title
Attest:

----------------------------------
[                        ]
-------------------------
[               ]
----------------

                                       43
<PAGE>   47

                                                                       EXHIBIT B

                            Form of Right Certificate
                                   Certificate

No. R-                                                              ______Rights
NOT EXERCISABLE AFTER _____, _______, OR EARLIER IF REDEEMED BY THE CORPORATION.
THE RIGHTS ARE SUBJECT TO REDEMPTION AT $0.1 PER RIGHT ON THE TERMS SET FORTH IN
THE RIGHTS AGREEMENT.

                                Right Certificate

                              Southern Energy, Inc.

         This certifies that ____________, or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of August 22, 2000 (the "Rights Agreement"), between
Southern Energy, Inc., a Delaware corporation (the "Corporation"), and
ChaseMellon Shareholder Services, L.L.C. (the "Rights Agent"), to purchase from
the Corporation at any time after the Distribution Date (as such term is defined
in the Rights Agreement) and prior to 5:00 P.M., New York time, on _______ ___,
unless the Rights evidenced hereby shall have been previously redeemed by the
Corporation, at the principal office or offices of the Rights Agent designated
for such purpose, or at the office of its successor as Rights Agent, one
one-thousandth of a fully paid non-assessable share of Series A Preferred Stock,
without par value (the "Preferred Shares"), of the Corporation, at a purchase
price of $250.00 per one one-thousandth of Preferred Share (the "Purchase
Price"), upon presentation and surrender of this Right Certificate with the Form
of Election to Purchase duly executed. The number of Rights evidenced by this
Right Certificate (and the number of one one-thousandths of a Preferred Share
which may be purchased upon exercise hereof) set forth above, and the Purchase
Price set forth above, are the number and Purchase Price as of ____, based on
the Preferred Shares as constituted at such date.

         Upon the occurrence of a Section 1l(a)(ii) Event (as such term is
defined in the Rights Agreement), if the Rights evidenced by this Right
Certificate are beneficially owned by (i) an Acquiring Person or an Affiliate or
Associate of any such Acquiring Person (as such terms are defined in the Rights
Agreement), (ii) a transferee of any such Acquiring Person, Associate or
Affiliate who becomes a transferee after the Acquiring Person becomes such, or
(iii) under certain circumstances specified in the Rights Agreement, a
transferee of any such Acquiring Person, Associate or Affiliate who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such,
such Rights shall become null and void and no holder hereof shall have any right
with respect to such Rights from and after the occurrence of such Section 11
(a)(ii) Event.

                                       44
<PAGE>   48

         As provided in the Rights Agreement, the Purchase Price and the number
of one one-thousandth of a Preferred Share or other securities which may be
purchased upon the exercise of the Rights evidenced by this Right Certificate
are subject to modification and adjustment upon the happening of certain events,
including Triggering Events (as such term is defined in the Rights Agreement).

         This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Corporation and the holders of the Right Certificates, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the principal executive offices of
the Corporation and the principal office or offices of the Rights Agent.

         This Right Certificate, with or without other Right Certificates, upon
surrender at the principal office of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor and date
evidencing Rights entitling the holder to purchase a like aggregate number of
Preferred Shares or other securities as the Rights evidenced by the Right
Certificate or Right Certificates surrendered shall have entitled such holder to
purchase. If this Right Certificate shall be exercised in part, the holder shall
be entitled to receive upon surrender hereof another Right Certificate or Right
Certificates for the number of whole Rights not exercised.

         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Certificate may be redeemed by the Corporation at a redemption price of
$.01 per Right (subject to adjustment as provided in the Rights Agreement)
payable in cash.

         No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions which are one
one-thousandth or integral multiples of one one-thousandth of a Preferred Share,
which may, at the election of the Corporation, be evidenced by depositary
receipts), but in lieu thereof a cash payment will be made, as provided in the
Rights Agreement.

         No holder of this Right Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the Corporation which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Corporation or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or other
distributions or to exercise any preemptive or subscription rights, or
otherwise, until the

                                       45
<PAGE>   49

Right or Rights evidenced by this Right Certificate shall have been exercised as
provided in the Rights Agreement.

         This Right Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent.

         WITNESS the facsimile signature of the proper officers of the
Corporation and its corporate seal. Dated as of ________,_____.

[SEAL]                                       SOUTHERN ENERGY, INC.
ATTEST:

                                             By:
---------------------------------               --------------------------------
Name:                                        Name:
     ----------------------------                 ------------------------------
Title:                                       Title:
      ---------------------------                  -----------------------------

Countersigned:

[                                ]
 --------------------------------

By:
   ------------------------------
   Authorized Signatory
   Name:
   Title:

                                       46
<PAGE>   50

                   Form of Reverse Side of Right Certificate
                               FORM OF ASSIGNMENT

                (To be executed by the registered holder if such
               holder desires to transfer the Right Certificate.)

         FOR VALUE RECEIVED ______________________ hereby sells, assigns and
transfers unto _________________________________________________________________
                       (Please print name and address of transferee)
________________________________________________________________________________

this Right Certificate, together with all right, title and interest therein, and
does hereby irrevocably constitute and appoint               Attorney, to
transfer the within Right Certificate on the books of the within-named
Corporation, with full power of substitution.

Dated: ____, ____

                                                        ------------------------
                                                        Signature

Signature Guaranteed:

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.

         The undersigned hereby certifies that (1) the Rights evidenced by this
Right Certificate are not being sold, assigned or transferred by or on behalf of
a Person who is or was an Acquiring Person or an Affiliate or Associate thereof
(as such terms are defined in the Right Agreement) and (2) after due inquiry and
to the best knowledge of the undersigned, the undersigned did not acquire the
Rights evidenced by this Right Certificate from any Person who is or was an
Acquiring Person or an Affiliate or Associate thereof (as such terms are defined
in the Rights Agreement).

                                                        ------------------------
                                                        Signature

                                       47
<PAGE>   51

                          FORM OF ELECTION TO PURCHASE

                    (To be executed by the registered holder
                    if such holder desires to exercise Rights
                     represented by the Right Certificate.)

To the Rights Agent:

         The undersigned hereby irrevocably elects to exercise ____ Rights
represented by this Right Certificate to purchase the Preferred Shares, Common
Shares or other securities issuable upon the exercise of such Rights and
requests that certificates for such Preferred Shares, Common Shares or other
securities be issued in the name of:

Please insert social security or other identifying number
or other identifying number ____________________________________________________
________________________________________________________________________________

                         (Please print name and address)

If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security
or other identifying number_____________________________________________________
________________________________________________________________________________

                         (Please print name and address)

________________________________________________________________________________

Dated: ______, ____

                                                        ------------------------
                                                        Signature

Signature Guaranteed.

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.

                                       48
<PAGE>   52

         The undersigned hereby certifies that (1) the Rights evidenced by this
Right Certificate are not being exercised by or on behalf of a Person who is or
was an Acquiring Person or an Affiliate or Associate thereof (as such terms are
defined in the Rights Agreement) and (2) after due inquiry and to the best
knowledge of the undersigned, the undersigned did not acquire the Rights
evidenced by this Rights Certificate from any Person who is or was an Acquiring
Person or an Affiliate or Associate thereof (as such terms are defined in the
Rights Agreement).

                                                        ------------------------
                                                        Signature

                                       49
<PAGE>   53

                                     NOTICE

         The signature on the foregoing Forms of Assignment and Election and
certificates must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

         In the event the certification set forth above in the Form of
Assignment or the Form of Election to Purchase, as the case maybe, is not
completed, the Corporation and the Rights Agent will deem the Beneficial Owner
of the Rights evidenced by this Right Certificate to be an Acquiring Person or
an Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement) and such Assignment or Election to Purchase will not be honored.

                                       50
<PAGE>   54

Preferred                                                              EXHIBIT C

                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES

         On [_______],____, the Board of Directors of [Issuer] (the
"Corporation") declared a dividend distribution of one preferred share purchase
right (a "Right') for each outstanding share of Common Stock, par value $0.01
per share (the "Common Shares"), of the Corporation. The dividend is payable to
the stockholders of record on , (the "Record Date"), and with respect to Common
Shares issued thereafter until the Distribution Date (as defined below) and, in
certain circumstances, with respect to Common Shares issued after the
Distribution Date. Except as set forth below, each Right, when it becomes
exercisable, entitles the registered holder to purchase from the Corporation one
one-thousandths of a share of Series A Preferred Stock, without par value (the
"Preferred Shares"), of the Corporation at a price of $250 per one
one-thousandths of a Preferred Share (the "Purchase Price"), subject to
adjustment. The description and terms of the Rights are set forth in a Rights
Agreement (the "Rights Agreement") between the Corporation and ChaseMellon
Shareholder Services, L.L.C., as Rights Agent (the "Rights Agent"), dated as of
August 22, 2000.

         Initially, the Rights will be attached to all certificates representing
Common Shares then outstanding, and no separate Right Certificates will be
distributed. The Rights will separate from the Common Shares upon the earliest
to occur of (i) a person or group of affiliated or associated persons having
acquired beneficial ownership of 15% or more of the outstanding Common Shares
(except pursuant to a Permitted Offer, as hereinafter defined); or (ii) 10 days
(or such later date as the Board may determine) following the commencement of,
or announcement of an intention to make, a tender offer or exchange offer the
consummation of which would result in a person or group becoming an Acquiring
Person (as hereinafter defined) (the earliest of such dates being called the
"Distribution Date"). A person or group whose acquisition of Common Shares
causes a Distribution Date pursuant to clause (i) above is an "Acquiring
Person." The date that a person or group becomes an Acquiring Person is the
"Shares Acquisition Date."

         The Rights Agreement provides that, until the Distribution Date, the
Rights will be transferred with and only with the Common Shares. Until the
Distribution Date (or earlier redemption or expiration of the Rights) new Common
Share certificates issued after the Record Date upon transfer or new issuance of
Common Shares will contain a notation incorporating the Rights Agreement by
reference. Until the Distribution Date (or earlier redemption or expiration of
the Rights), the surrender for transfer of any certificates for Common Shares
outstanding as of the Record Date, even without such notation or a copy of this
Summary of Rights being attached thereto, will also constitute the transfer of
the Rights associated with the Common Shares represented by such certificate. As
soon as practicable following the Distribution Date, separate certificates
evidencing the Rights ("Right Certificates") will be mailed to holders of record
of the Common Shares as of the close of business on the Distribution Date (and
to each initial record holder of certain Common Shares issued after the
Distribution Date), and such separate Right Certificates alone will evidence the
Rights.

                                       51
<PAGE>   55

         The Rights are not exercisable until the Distribution Date and will
expire at the close of business on August 22, 2000, unless earlier redeemed by
the Corporation as described below.

         In the event that any person becomes an Acquiring Person (except
pursuant to a tender or exchange offer which is for all outstanding Common
Shares at a price and on terms which a majority of certain members of the Board
of Directors determines to be adequate and in the best interests of the
Corporation, its stockholders and other relevant constituencies, other than such
Acquiring Person, its affiliates and associates (a "Permitted Offer")), each
holder of a Right will thereafter have the right (the "Flip-In Right") to
receive upon exercise the number of Common Shares or of one one-thousandths of a
share of Preferred Shares (or, in certain circumstances, other securities of the
Corporation) having a value (immediately prior to such triggering event) equal
to two times the exercise price of the Right. Notwithstanding the foregoing,
following the occurrence of the event described above, all Rights that are, or
(under certain circumstances specified in the Rights Agreement) were,
beneficially owned by any Acquiring Person or any affiliate or associate thereof
will be null and void.

         In the event that, at any time following the Shares Acquisition Date,
(i) the Corporation is acquired in a merger or other business combination
transaction in which the holders of all of the outstanding Common Shares
immediately prior to the consummation of the transaction are not the holders of
all of the surviving corporation's voting power, or (ii) more than 50% of the
Corporation's assets or earning power is sold or transferred, in either case
with or to an Acquiring Person or any affiliate or associate or any other person
in which such Acquiring Person, affiliate or associate has an interest or any
person acting on behalf of or in concert with such Acquiring Person, affiliate
or associate, or, if in such transaction all holders of Common Shares are not
treated alike, any other person, then each holder of a Right (except Rights
which previously have been voided as set forth above) shall thereafter have the
right (the "Flip-Over Right") to receive, upon exercise, common shares of the
acquiring company having a value equal to two times the exercise price of the
Right. The holder of a Right will continue to have the Flip-Over Right whether
or not such holder exercises or surrenders the Flip-In Right.

         The Purchase Price payable, and the number of Preferred Shares, Common
Shares or other securities issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares at a price, or
securities convertible into Preferred Shares with a conversion price, less than
the then current market price of the Preferred Shares or (iii) upon the
distribution to holders of the Preferred Shares of evidences of indebtedness or
assets (excluding regular quarterly cash dividends) or of subscription rights or
warrants (other than those referred to above).

         The number of outstanding Rights and the number of one one-thousandths
of a Preferred Share issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Shares or a stock
dividend on the Common Shares payable in Common Shares or subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

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<PAGE>   56

         Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $10.00 per share but, if greater, will be entitled
to an aggregate dividend per share of 1,000 times the dividend declared per
Common Share. In the event of liquidation, the holders of the Preferred Shares
will be entitled to a minimum preferential liquidation payment of $10.00 per
share; thereafter, and after the holders of the Common Shares receive a
liquidation payment of $0.01. per share, the holders of the Preferred Shares and
the holders of the Common Shares will share the remaining assets in the ratio of
1,000 to 1 (as adjusted) for each Preferred Share and Capital Share so held,
respectively. Finally, in the event of any merger, consolidation or other
transaction in which Common Shares are exchanged, each Preferred Share will be
entitled to receive 1,000 times the amount received per Common Share. These
rights are protected by customary antidilution provisions. In the event that the
amount of accrued and unpaid dividends on the Preferred Shares is equivalent to
six full quarterly dividends or more, the holders of the Preferred Shares shall
have the right, voting as a class, to elect two directors in addition to the
directors elected by the holders of the Common Shares until all cumulative
dividends on the Preferred Shares have been paid through the last quarterly
dividend payment date or until non-cumulative dividends have been paid regularly
for at least one year.

         With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional Preferred Shares will be issued (other than
fractions which are one one-thousandth or integral multiples of one
one-thousandth of a Preferred Share, which may, at the election of the
Corporation, be evidenced by depositary receipts) and in lieu thereof, an
adjustment in cash will be made based on the market price of the Preferred
Shares on the last trading day prior to the date of exercise.

         At any time prior to the earlier to occur of (i) a person becoming an
Acquiring Person or (ii) the expiration of the Rights, and under certain other
circumstances, the Corporation may redeem the Rights in whole, but not in part,
at a price of $.01 per Right (the "Redemption Price") which redemption shall be
effective upon the action of the Board of Directors. Additionally, following the
Shares Acquisition Date, the Corporation may redeem the then outstanding Rights
in whole, but not in part, at the Redemption Price, provided that such
redemption is in connection with a merger or other business combination
transaction or series of transactions involving the Corporation in which all
holders of Common Shares are treated alike but not involving an Acquiring Person
or its affiliates or associates.

         All of the provisions of the Rights Agreement may be amended by the
Board of Directors of the Corporation prior to the Distribution Date. After the
Distribution Date, the provisions of the Rights Agreement may be amended by the
Board in order to cure any ambiguity, defect or inconsistency, to make changes
which do not adversely affect the interests of holders of Rights (excluding the
interests of any Acquiring Person), or, subject to certain limitations, to
shorten or lengthen any time period under the Rights Agreement.

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<PAGE>   57

         Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Corporation, including, without limitation, the
right to vote or to receive dividends. While the distribution of the Rights will
not be taxable to stockholders of the Corporation, stockholders may, depending
upon the circumstances, recognize taxable income should the Rights become
exercisable or upon the occurrence of certain events thereafter.

         A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form S-1 dated
August __, 2000. A copy of the Rights Agreement is available free of charge from
the Corporation. This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement,
which is hereby incorporated herein by reference.

                                       54

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