MAPCO INC
8-A12B, 1996-06-11
PETROLEUM REFINING
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    Form 8-A

               For Registration of Certain Classes of Securities
                    Pursuant to Section 12(b) or (g) of the
                        Securities Exchange Act of 1934


                                   MAPCO Inc.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


             Delaware                                    73-0705739 
- ----------------------------------------     -----------------------------------
     (State of incorporation                         (I.R.S. Employer 
         or organization)                           Identification No.)

  1800 South Baltimore Ave., Tulsa, OK                     74119 
- ----------------------------------------     -----------------------------------
(Address of principal executive offices)                 (Zip Code)



If this Form relates to the registration of a class of debt securities and its
effect upon filing pursuant to General Instruction A.(c)(1), please check the
following box.  [ ]

If this Form relates to the registration of a class of debt securities and is
to become effective simultaneously with the effectiveness of a concurrent
registration statement under the Securities Act of 1933 pursuant to General
Instruction A.(c)(2), please check the following box.  [ ]

Securities to be registered pursuant to Section 12(b) of the Act:

        Title of each class               Name of each exchange on which
        to be so registered               each class is to be registered

                                                     
   Series A Junior Participating                          New York
                                             -----------------------------------
          Preferred Stock                                  Chicago
                                             -----------------------------------
           No Par Value                                    Pacific
- -----------------------------------          -----------------------------------

Securities to be registered pursuant to Section 12(g) of the Act:

                                      None
- --------------------------------------------------------------------------------
                                (Title of class)

- --------------------------------------------------------------------------------
                                (Title of class)
<PAGE>   2
ITEM 1.  DESCRIPTION OF REGISTRANTS SECURITIES TO BE REGISTERED

                 On May 29, 1996, the Board of Directors of MAPCO Inc. (the
"Company") declared a dividend distribution of one Preferred Stock Purchase
Right (a "Right") for each outstanding share of MAPCO Inc. Common Stock (the
"Common Stock"), par value $1.00 per share, to stockholders of record at the
Close of Business on July 8, 1996 (the "Record Date").  The following is a
summary of the terms of the Rights.  The Summary does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement
between MAPCO Inc. and Harris Trust Company of New York, Rights Agent, dated as
of May 29, 1996:

                 Each Right entitles the registered holder to purchase from the
Company a unit consisting of one two-hundredth of a share of Series A Junior
Participating Preferred Stock, without par value (the "Preferred Stock") at a
price of $200 per one two-hundredth of a share of Preferred Stock, subject to
adjustment (the "Purchase Price").  The description and terms of the Rights are
set forth in a Rights Agreement dated as of May 29, 1996 (the "Rights
Agreement") between the Company and Harris Trust Company of New York, as Rights
Agent.

                 Initially, the Rights will be attached to all Common Stock
certificates representing shares then outstanding, and no separate Right
Certificate will be distributed.  The Rights will separate from the Common
Stock and a "Distribution Date" will occur upon the earlier of (i) ten business
days following a public announcement that a person or group of affiliated or
associated persons (an "Acquiring Person") has acquired, or obtained the right
to acquire, beneficial ownership of 15% or more of the outstanding shares of
Common Stock (the "Stock Acquisition Date"), or (ii) ten business days (or, if
determined by the Board of Directors, a specified or unspecified later date)
following the commencement or announcement of a tender offer or exchange offer
that would result in a person or group beneficially owning 15% or more of such
outstanding shares of Common Stock.

                 Until the Distribution Date, (i) the Rights will be evidenced
by the Common Stock certificates and will be transferred with and only with
such Common Stock certificates, (ii) new Common Stock certificates issued after
July 8, 1996 will contain a notation incorporating the Rights Agreement by
reference and (iii) the surrender for transfer of any certificates from Common
Stock outstanding will also constitute the transfer of the Rights associated
with the Common Stock represented by such certificate.  As soon as practicable
after the Distribution Date, Right Certificates will be mailed to holders of
record of the Common Stock as of the Close of Business on the Distribution Date
and, thereafter, the separate Right Certificate alone will represent the
Rights.  Except as otherwise determined by the Board of Directors, only shares
of Common Stock issued prior to the Distribution Date will be issued with
Rights.

                 The Rights are not exercisable until the Distribution Date and
will expire at the Close of Business on July 7, 2006, unless earlier redeemed
by the Company as described below.

                 In the event that a person or group becomes an Acquiring
Person (except pursuant to a tender offer for all outstanding Common Stock
determined to be at a fair price and otherwise in the best interests of the
Company and its stockholders by at least a majority of the members of the
<PAGE>   3
Board of Directors who are not officers of the Company or an Acquiring Person)
proper provision shall be made so that each holder of a Right (other than the
Acquiring Person) will thereafter have the right to receive upon exercise that
number of shares of Common Stock (or, in certain circumstances, cash, a
reduction in the Purchase Price, Common Stock, other equity securities of the
Company, debt securities of the Company, other assets or a combination thereof)
having a market value (as defined in the Rights Agreement) of two times the
Purchase Price of the Right.

                 In the event that, at any time following the Stock Acquisition
Date, the Company is acquired in a merger or other business combination
transaction (except certain transactions with a person who becomes an Acquiring
Person as a result of a tender offer described in the second preceding
paragraph) or 50% or more of its assets, cash flow or earning power is sold,
proper provision shall be made so that each holder of a Right will thereafter
have the right to receive, upon exercise thereof at the then current exercise
price of the Right, that number of shares of common stock of the acquiring
company which at the time of such transaction would have a market value (as
defined in the Rights Agreement) of two times the Purchase Price of the Right.
In the event that, after the Stock Acquisition Date, the Company were the
surviving Corporation in a merger and its Common Stock were changed or
exchanged, proper provision shall be made so that each holder of a Right will
thereafter have the right to receive upon exercise that number of shares of
common stock of the Company having a market value of two times the exercise
price of the Right. The events set forth in this paragraph and in the preceding
paragraph are referred to as the "Triggering Events."

                 Notwithstanding any of the foregoing, following the occurrence
of any of the events set forth in the preceding paragraphs, all Rights that
are, or (under certain circumstances specified in the Rights Agreement) were,
beneficially owned by any Acquiring Person will be null and void.  A person
will not become an Acquiring Person if the Board of Directors of the Company
determines that such person or group became an Acquiring Person inadvertently
and such person or group promptly divests itself of sufficient number of shares
of Common Stock so that such person or group is no longer an Acquiring Person.

                 The Purchase Price payable, and the number of Shares of
Preferred Stock or other securities or property 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 Stock, (ii) upon the grant to holders of the
Preferred Stock of certain rights or warrants to subscribe for Preferred Stock
or convertible securities at less than the current market price of the
Preferred Stock, or (iii) upon the distribution to holders of the Preferred
Stock of evidences of indebtedness or assets (excluding regular quarterly cash
dividends) or of subscription rights or warrants (other than those referred to
above).

                 With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments amount to at least 1% of the
Purchase Price.  No fractional Shares will be issued (other than fractions
which are integral multiples of one two-hundredth of a share of Preferred Stock
which may, upon the election of the Company, be evidenced by depository
receipts) and, in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Stock on the last trading date prior to the date
of exercise.
<PAGE>   4
                 At any time prior to the earlier of the Stock Acquisition Date
and the Final Expiration Date (as defined in the rights Agreement), the Board
of Directors of the Company may redeem the Rights in whole, but not in part, at
a price of $.01 per Right.  Immediately upon the action of the Board of
Directors ordering redemption of the Rights, the Rights will terminate and the
only right of the holders of Rights will be to receive the $.01 redemption
price.

                 At any time after a person becomes an Acquiring Person and
prior to the acquisition by such Person of 50% or more of the outstanding
shares of Common Stock, the Board of Directors of the Company may exchange the
Rights (other than Rights beneficially owned by such Person which have become
void), in whole or part, at an exchange ratio of one share of Common Stock per
Right (subject to adjustment).  The Company, at its option, may substitute one
two- hundredth of a share of Preferred Stock (or other series of substantially
similar preferred stock of the Company) for each share of Common Stock to be
exchanged.

                 Until a Right is exercised, the holder thereof, as such, will
have no rights as a stockholder of the Company, including, without limitation,
the right to vote or to receive dividends.

                 Other than those provisions relating to the principal economic
terms of the Rights, any of the provisions of the Rights Agreement may be
amended by the Board of Directors of the Company prior to the Stock Acquisition
Date. After the Stock Acquisition Date, the provisions of the Rights Agreement
may be amended by the Board in order to cure any ambiguity, to correct or
supplement defective or inconsistent provisions, to shorten or lengthen any
time period (other than time periods relating to when the Rights may be
redeemed) under the Rights Agreement or to make changes which do not adversely
affect the interests of, or diminish the benefits intended to be afforded to,
holders of Rights (excluding the interests of any Acquiring Person); provided,
however, that no amendment to adjust the time period governing redemption shall
be made at such time as the Rights are not redeemable.

Item 2.  Exhibits

         4.       Rights Agreement between MAPCO Inc. and Harris Trust
                  Company of New York, Rights Agent, dated as of May
                  29, 1996, which includes as Exhibit B the form of
                  Right Certificate.

     Pursuant to the requirements of Section 12 of the Securities Exchange
     Act of 1934, the registrant has duly caused this registration
     statement to be signed on its behalf by the undersigned, thereunto
     duly authorized.

                                            MAPCO Inc.



Date:    June 11, 1996                      By: /s/ JAMES N. CUNDIFF 
                                            ------------------------------------
                                                James N. Cundiff
                                                Assistant General Counsel &
                                                Assistant Secretary
<PAGE>   5
                              INDEX TO EXHIBITS


<TABLE>
<CAPTION>
   EXHIBIT NO.                  DESCRIPTION
   -----------                  -----------
   <S>            <C>
         4.       Rights Agreement between MAPCO Inc. and Harris Trust
                  Company of New York, Rights Agent, dated as of May
                  29, 1996, which includes as Exhibit B the form of
                  Right Certificate.

</TABLE>

<PAGE>   1

================================================================================



                                   MAPCO Inc.

                                      and

                        HARRIS TRUST COMPANY OF NEW YORK

                                  Rights Agent





                              ____________________



                                Rights Agreement

                            Dated as of May 29, 1996



================================================================================

<PAGE>   2





                               TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                                                                     Page
<S>                    <C>                                                                                             <C>
Section 1.             Certain Definitions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Section 2.             Appointment of Rights Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Section 3.             Issue of Right Certificates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Section 4.             Form of Right Certificates   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10

Section 5.             Countersignature and Registration  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

Section 6.             Transfer, Split Up, Combination and Exchange of Right Certificates; Mutilated,
                       Destroyed, Lost or Stolen Right Certificates   . . . . . . . . . . . . . . . . . . . . . . . .  12

Section 7.             Exercise of Rights; Purchase Price; Expiration Date of Rights  . . . . . . . . . . . . . . . .  13

Section 8.             Cancellation and Destruction of Right Certificates   . . . . . . . . . . . . . . . . . . . . .  16

Section 9.             Reservation and Availability of Capital Stock  . . . . . . . . . . . . . . . . . . . . . . . .  16

Section 10.            Preferred Stock Record Date  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18

Section 11.            Adjustment of Purchase Price, Number and Kind of Shares or Number of Rights  . . . . . . . . .  19

Section 12.            Certificate of Adjusted Purchase Price or Number of Shares   . . . . . . . . . . . . . . . . .  31

Section 13.            Consolidation, Merger or Sale or Transfer of Assets or Earning Power   . . . . . . . . . . . .  31

Section 14.            Fractional Rights and Fractional Shares  . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
</TABLE>





<PAGE>   3


<TABLE>
<S>                    <C>                                                                                             <C>
Section 15.            Rights of Action   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36

Section 16.            Agreement of Rights Holders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37

Section 17.            Right Certificate Holder Not Deemed a Stockholder  . . . . . . . . . . . . . . . . . . . . . .  38

Section 18.            Concerning the Rights Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38

Section 19.            Merger or Consolidation or Change of Name of Rights Agent  . . . . . . . . . . . . . . . . . .  39

Section 20.            Duties of Rights Agent   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40

Section 21.            Change of Rights Agent   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42

Section 22.            Issuance of New Right Certificates   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43

Section 23.            Redemption and Termination   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44

Section 23A.           Exchange   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45

Section 24.            Notice of Certain Events   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47

Section 25.            Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48

Section 26.            Supplements and Amendments   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49

Section 27.            Successors   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50

Section 28.            Determinations and Actions by the Board of Directors, etc  . . . . . . . . . . . . . . . . . .  50

Section 29.            Benefits of this Agreement   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50

Section 30.            Severability   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51

Section 31.            Governing Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51

Section 32.            Counterparts   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51
</TABLE>





                                       ii
<PAGE>   4


<TABLE>
<S>                                                                                                                    <C>
Section 33.            Descriptive Headings   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52


Exhibit A -            Certificate of Designation

Exhibit B -            Form of Right Certificate

Exhibit C -            Form of Summary of Rights
</TABLE>





                                      iii
<PAGE>   5




                                RIGHTS AGREEMENT

                 RIGHTS AGREEMENT, dated as of  May 29, 1996 (the "Agreement"),
between MAPCO Inc., a Delaware corporation (the "Company"), and HARRIS TRUST
COMPANY OF NEW YORK, a New York trust company (the "Rights Agent").

                              W I T N E S S E T H

                 WHEREAS, on May 29, 1996, (the "Rights Dividend Declaration
Date"), the Board of Directors of the Company has authorized and declared a
dividend of one Right (as hereinafter defined) for each share of Common Stock,
par value $1.00 per share, of the Company (the "Common Stock") outstanding at
the Close of Business (as hereinafter defined) on July 8, 1996 (the "Record
Date"), and has authorized the issuance of one Right (as such number may
hereinafter be adjusted pursuant to the provisions of Section 11(p) hereof) for
each share of Common Stock of the Company issued between the Record Date
(whether originally issued or delivered from the Company's treasury) and the
Distribution Date (as hereinafter defined), each Right initially representing
the right to purchase one two-hundredth of a share of Series A Junior
Participating Preferred Stock of the Company having the rights and preferences
set forth in the form of Certificate of Designation, Preferences and Rights
attached hereto as Exhibit A, upon the terms and subject to the conditions
hereinafter set forth (the "Rights");

                 NOW, THEREFORE, 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 shares of Common
         Stock then outstanding,
<PAGE>   6
         but shall not include the Company, any Subsidiary of the Company, any
         employee benefit plan of the Company or of any Subsidiary of the
         Company, or any Person or entity organized, appointed or established
         by the Company for or pursuant to the terms of any such employee
         benefit plan.  Notwithstanding the foregoing:

                            (i)  no Person shall become an "Acquiring Person"
                 as the result of an acquisition of shares of Common Stock by
                 the Company which, by reducing the number of shares of Common
                 Stock outstanding, increases the proportionate number of
                 shares Beneficially Owned by such Person to 15% or more of the
                 shares of Common Stock of the Company then outstanding,
                 provided, however, that if a Person shall become the
                 Beneficial Owner of 15% or more of the shares of Common Stock
                 of the Company by reason of share purchases by the Company,
                 and shall, after such share purchases by the Company at a time
                 when such Person Beneficially Owns 15% or more of the Common
                 Stock, become the Beneficial Owner of any additional shares of
                 Common Stock of the Company, then such Person shall be deemed
                 to be an "Acquiring Person";

                           (ii)  if the Board of Directors of the Company
                 determines in good faith that a Person who would otherwise be
                 an "Acquiring Person" has become such inadvertently
                 (including, without limitation, because (A) such Person was
                 unaware that he, she or it Beneficially Owned a percentage of
                 Common Stock that would otherwise cause such a Person to be an
                 "Acquiring Person" or (B) such Person was aware of the extent
                 of his, her or its Beneficial Ownership but had no actual
                 knowledge of the consequences of such Beneficial Ownership
                 under this Agreement) and without any intention of changing or
                 influencing control of the Company, and if such Person, as
                 promptly as practicable divested or divests himself, herself
                 or itself of Beneficial Ownership of a sufficient number of
                 shares of Common Stock so that such Person would





                                       2
<PAGE>   7
                 no longer be an "Acquiring Person", then such Person shall
                 not be deemed to be or have become an "Acquiring Person" for
                 any purposes of this Agreement; and

                          (iii)  no Person shall become an "Acquiring Person"
                 by virtue of ownership of Common Stock of the Company by any
                 Affiliate and/or Associate of such Person, which Affiliate
                 and/or Associate is deemed to be an Affiliate and/or Associate
                 of such Person solely by reason of such Affiliate and/or
                 Associate being a director or officer of the Company.

                 (b)  "Adjustment Shares" shall have the meaning set forth in
         Section 11(a)(ii) hereof.

                 (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 Record Date (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, directly or indirectly, has the
                 right to acquire (whether such right is exercisable
                 immediately or only after the passage of time) pursuant to any
                 agreement, arrangement or understanding (whether or not in
                 writing) or upon the exercise of conversion rights, exchange
                 rights, rights (other than these Rights), warrants or options,
                 or otherwise; provided, however, that a Person shall not be
                 deemed the "Beneficial Owner" of, or to "beneficially own,"
                 (A) 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





                                       3
<PAGE>   8
                 securities are accepted for purchase or exchange, or (B)
                 securities issuable upon exercise of Rights at any time prior
                 to the occurrence of a Triggering Event, or (C) securities
                 issuable upon exercise of Rights from and after the occurrence
                 of a Triggering Event which Rights were acquired by such
                 Person or any such Person's Affiliates or Associates prior to
                 the Distribution Date or pursuant to Section 3(a) or Section
                 22 hereof (the "Original Rights") or pursuant to Section 11(i)
                 hereof in connection with an adjustment made with respect to
                 any Original Rights;

                          (ii)  which such Person or any of such Person's
                 Affiliates or Associates, directly or indirectly, has the
                 right to vote or dispose of or has "beneficial ownership" of
                 (as determined pursuant to Rule 13d-3 of the General Rules and
                 Regulations under the Exchange Act), including pursuant to any
                 agreement, arrangement or understanding, whether or not in
                 writing; provided, however, that a Person shall not be deemed
                 the "Beneficial Owner" of, or to "beneficially own," any
                 security under this subparagraph (ii) as a result of an
                 agreement, arrangement or understanding to vote such security
                 if such agreement, arrangement or understanding:  (A) arises
                 solely from a revocable proxy given in response to a public
                 proxy or consent solicitation made pursuant to, and in
                 accordance with, the applicable provisions of the General
                 Rules and Regulations under the Exchange Act, and (B) is not
                 also then reportable by such Person 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 (whether or not in writing), for the





                                       4
<PAGE>   9
                 purpose of acquiring, holding, voting (except pursuant to a
                 revocable proxy as described in the proviso to subparagraph
                 (ii) of this paragraph (d)) or disposing of any voting
                 securities of the Company in a manner that relates or is
                 reasonably likely potentially to relate to influencing the
                 control or management of the Company;

provided, however, that nothing in this paragraph (d) shall cause a person
engaged in business as an underwriter of securities to be the "Beneficial
Owner" of, or to "beneficially own," any securities acquired through such
person's participation in good faith in a firm commitment underwriting until
the expiration of forty days after the date of such acquisition.

                 (e)      "Board of Directors" or "Board" shall mean the Board
         of Directors of the Company.

                 (f)      "Business Day" shall mean any day other than a
         Saturday, Sunday or a day on which banking institutions in the State
         of New York are authorized or obligated by law or executive order to
         close.

                 (g)      "Certificate of Designation" shall mean the
         Certificate of Designation of Junior Participating Preferred Stock
         setting forth the powers, preferences, rights, qualifications,
         limitations and restrictions of such series of preferred stock of the
         Company, a form of which is attached hereto as Exhibit A.

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

                 (i)      "Common Stock" shall mean the common stock, par value
         $1.00 per share, of the Company, except that "Common Stock" when used
         with reference to any Person other than the Company shall mean the
         capital stock of such Person with the greatest voting power, or the


                                       5
<PAGE>   10
         equity securities or other equity interest having power to control or
         direct the management, of such Person or, if such Person is a
         Subsidiary of another Person, the capital stock with the greatest
         voting power of the Person which ultimately controls such
         first-mentioned Person.  "Common Stock" when used with reference to
         any Person which is not organized in corporate form shall mean units
         of beneficial interest which (i) shall represent the right to
         participate generally in the profits and losses of such Person
         (including, without limitation, any flow-through tax benefits
         resulting from an ownership interest in such Person) and which (ii)
         shall be entitled to exercise the greatest voting power of such Person
         or, in the case of a limited partnership, shall have the power to
         remove the general partner or partners.

                 (j)      "Common Stock Equivalents" shall have the meaning set
         forth in Section 11(a)(iii) hereof.

                 (k)      "Company" shall have the meaning set forth in the
         first paragraph of this Agreement.

                 (l)      "Current Market Price" shall have the meaning set
         forth in Section 11(d) hereof.

                 (m)      "Current Value" shall have the meaning set forth in
         Section 11(a)(iii).

                 (n)      "Distribution Date" shall have the meaning specified
         in Section 3(a) hereof.

                 (o)      "Equivalent Preferred Stock" shall have the meaning
         set forth in Section 11(b) hereof.

                 (p)      "Expiration Date" shall have the meaning specified in
         Section 7(a) hereof.

                 (q)      "Final Expiration Date" shall have the meaning
         specified in Section 7(a) hereof.


                                       6
<PAGE>   11
                 (r)      "NASDAQ" shall have the meaning set forth in Section
         11(d) hereof.

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

                 (t)      "Preferred Stock" shall mean shares of Series A
         Junior Participating Preferred Stock, no par value, of the Company,
         having the rights, preferences and limitations set forth in the form
         of Certificate of Designation attached to this Agreement as Exhibit A,
         and, to the extent there are not a sufficient number of shares of
         Junior Participating Preferred Stock authorized to permit the full
         exercise of the then outstanding Rights, any other series of preferred
         stock of the Company designated for such purpose by the Board of
         Directors of the Company containing terms substantially similar to the
         terms of the Series A Junior Participating Preferred Stock.

                 (u)      "Principal Party" shall have the meaning set forth in
         Section 13(b) hereof.

                 (v)      "Purchase Price" shall have the meaning set forth in
         Section 4(a) hereof.

                 (w)      "Record Date" shall have the meaning set forth in the
         preamble to this Agreement.

                 (x)      "Redemption Price" shall have the meaning set forth
         in Section 23(a) hereof.

                 (y)      "Right" shall have the meaning set forth in the
         preamble to this Agreement.

                 (z)      "Rights Agent" shall have the meaning set forth in
         Section 2 hereof.

                 (aa)     "Right Certificate" shall have the meaning set forth
         in Section 3(a) hereof.





                                       7
<PAGE>   12

                 (bb)     "Section 11(a)(ii) Event" shall have the meaning set
         forth in Section 11(a)(ii) hereof.

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

                 (dd)     "Spread" shall have the meaning set forth in Section
         11(a)(iii) hereof.

                 (ee)     "Stock Acquisition Date" shall mean the time of
         occurrence of whichever of the following first occurs:  (i) the first
         public announcement (which, for purposes of this definition, shall
         include, without limitation, a report filed pursuant to Section 13(d)
         under the Exchange Act) by the Company or an Acquiring Person that an
         Acquiring Person has become such or (ii) the communication to the
         Company (including, without limitation, to the directors of the
         Company) of any notice (including, without limitation, any written
         consent or notice related thereto) from an Acquiring Person indicating
         or reflecting that the Acquiring Person has become such.

                 (ff)     "Subsidiary" shall mean, with reference to any
         Person, any corporation or other entity of which an amount of voting
         securities sufficient to elect at least a majority of the directors of
         such corporation is beneficially owned, directly or indirectly, by
         such Person, or otherwise controlled by such Person.

                 (gg)     "Substitution Period" shall have the meaning set
         forth in Section 11(a)(iii) hereof.

                 (hh)     "Summary of Rights" shall have the meaning set forth
         in Section 3(b) hereof.
      
                 (ii)     "Trading Day" shall have the meaning set forth in
         Section 11(d) hereof.

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





                                       8
<PAGE>   13

                 Section 2.  Appointment of Rights Agent.  The Company hereby
appoints the Rights Agent to act as agent for the Company in accordance with
the terms and conditions hereof, and the Rights Agent hereby accepts such
appointment.  The Company may from time to time appoint such Co-Rights Agents
as it may deem necessary or desirable.  Any actions which may be taken by the
Rights Agent pursuant to the terms of this Agreement may be taken by any such
Co- Rights Agent.

                 Section 3.  Issue of Right Certificates.

                 (a)      Until the earlier of the Close of Business on (i) the
tenth Business Day after the Stock Acquisition Date or (ii) the tenth Business
Day (or such specified or unspecified later date as may be determined by the
Board of Directors of the Company) after the date of the commencement of (as
determined by reference to Rule 14d-2(a), as in effect under the Exchange Act
on the Record Date), or first public announcement of the intent of any Person
(other than the Company, any Subsidiary of the Company, any employee benefit
plan of the Company or of any Subsidiary of the Company, or any Person
organized, appointed or established by the Company or such Subsidiary as a
fiduciary pursuant to the terms of any such employee benefit plan) to commence
(which intention to commence remains in effect for five Business Days after
such announcement), a tender or exchange offer for an amount of Common Stock of
the Company which, together with the shares of such stock already owned by such
Person, constitutes 15% or more of the outstanding Common Stock of the Company
(including any such date which is after the date of this Agreement and prior to
the issuance of the Rights) (the earlier of such dates described in clauses (i)
and (ii) being herein referred to as the "Distribution Date"), (x) the Rights
will be evidenced (subject to the provisions of paragraph (b) of this Section
3) by the certificates for shares of the Common Stock registered in the names
of the holders of the Common Stock (which certificates for Common Stock shall
be deemed also to be certificates for Rights) and not by separate certificates,
and (y) the right to receive Right Certificates will be transferable only in
connection with the transfer of the





                                       9
<PAGE>   14
underlying shares of Common Stock.  As soon as practicable after the
Distribution Date, the Rights Agent will send by first-class, insured, postage
prepaid mail, to each record holder of the Common Stock as of the Close of
Business on the Distribution Date, at the address of such holder shown on the
records of the Company, a Right Certificate, in substantially the form of
Exhibit B hereto (the "Right Certificate"), evidencing one Right for each share
of Common Stock so held, subject to adjustment as provided herein and to the
provisions of Section 14(a) hereof.  As of and after the Distribution Date, the
Rights will be evidenced solely by such Right Certificates.

                 (b)      On the Record Date, or as soon as practicable
thereafter, the Company will send a copy of a Summary of Rights, in
substantially the form attached hereto as Exhibit C (the "Summary of Rights"),
to each record holder of the Common Stock as of the Close of Business on the
Record Date, at the address of such holder shown on the records of the Company.
With respect to certificates for the Common Stock outstanding as of the Record
Date, until the earlier of the Distribution Date or the Expiration Date, the
Rights will be evidenced by such certificates for the Common Stock and the
registered holders of the Common Stock shall also be the registered holders of
the associated Rights.  Until the earliest of the Distribution Date, the
Expiration Date and the Final Expiration Date, the transfer of any certificates
representing shares of Common Stock in respect of which Rights have been issued
shall also constitute the transfer of the Rights associated with such shares of
Common Stock.

                 (c)      Rights shall be issued in respect of all shares of
Common Stock which are issued or delivered from the Company's treasury after
the Record Date but prior to the earlier of the Distribution Date or the
Expiration Date.  Certificates representing such shares of Common Stock shall
also be deemed 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 the Rights Agreement between MAPCO
         Inc. (the "Company") and





                                       10
<PAGE>   15
         Harris Trust Company of New York (the "Rights Agent") dated as of May
         29, 1996 (as amended from time to time, the "Rights Agreement"), the
         terms of which are hereby incorporated herein by reference and a copy
         of which is on file at the principal offices of the Company.  Under
         certain circumstances, as set forth in the Rights Agreement, such
         Rights will be evidenced by separate certificates and will no longer
         be evidenced by this certificate.  The Company will mail to the holder
         of this certificate a copy of the Rights Agreement, as in effect on
         the date of mailing, without charge promptly 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 any Affiliate or Associate
         thereof (as such terms are defined in the Rights Agreement), whether
         currently held by or on behalf of such Person or by any subsequent
         holder, may become null and void.  The Rights shall not be
         exercisable, and shall be void so long as held, by a holder in any
         jurisdiction where the requisite qualification for the issuance to
         such holder, or the exercise by such holder of the Rights in such
         jurisdiction, shall not have been obtained or obtainable.

With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Stock represented by
such certificates shall be evidenced by such certificates alone, and the
transfer of any such certificates shall also constitute the transfer of the
Rights associated with the Common Stock represented by such certificates.

                 Section 4.  Form of Right Certificates.

                 (a)      The Right Certificates (and the forms of election to
purchase and of assignment to be printed on the reverse thereof) shall each 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 Company may deem appro-





                                       11
<PAGE>   16
priate 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, whenever distributed, which are distributed in respect of
shares of Common Stock which were issued and outstanding as of the Record Date,
shall be dated as of the Record Date, and all Right Certificates which are
distributed in respect of other shares of Common Stock shall be dated as of the
respective dates of issuance of such Common Stock, and in each such case on
their face shall entitle the holders thereof to purchase such number of one
two-hundredths of a share of Preferred Stock as shall be set forth therein at
the price set forth therein (such exercise price per one two-hundredth of a
share, 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 beneficially owned by:  (i) an
Acquiring Person or any Associate or Affiliate of an Acquiring Person, (ii) a
transferee of an Acquiring Person (or of any such Associate or Affiliate) who
becomes a transferee after the Acquiring Person becomes such, or (iii) a
transferee of an Acquiring Person (or of any such Associate or Affiliate) who
becomes a transferee prior to or concurrently with the Acquiring Person
becoming 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 such
Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which the Board of Directors
of the Company has determined is part of a plan, arrangement or understanding
(whether or not in writing) which has as a primary purpose or effect the
avoidance of the provisions of Section 7(e), Section 11(a)(ii) or of Section 13
hereof with respect to





                                       12
<PAGE>   17
the limitation of the Rights beneficially owned by an Acquiring Person (or any
Associate or Affiliate thereof), 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 modified as necessary to
apply to such Person:

         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 may become null and void in the
         circumstances specified in Section 7(e) of such Agreement.

                 Section 5.  Countersignature and Registration.

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





                                       13
<PAGE>   18
although at the date of the execution of this Rights Agreement any such person
was not such an officer.

                 (b)      Following the Distribution Date, the Rights Agent
will keep or cause to be kept, at its principal office or offices designated as
the appropriate place for surrender of Right Certificates upon exercise 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 date and certificate number of each
of the Right Certificates.

                 Section 6.  Transfer, Split Up, Combination and Exchange of
Right Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificates.
(a)  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 Expiration Date and the Final
Expiration Date, any Right Certificate or Certificates may be transferred,
split up, combined or exchanged for another Right Certificate or Certificates,
entitling the registered holder to purchase a like number of one two-hundredths
of a share of Preferred Stock (or, following a Triggering Event, Common Stock,
other securities, cash or other assets, as the case may be) as the Right
Certificate or Certificates surrendered then entitled 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
Certificates shall make such request in writing delivered to the Rights Agent,
and shall surrender the Right Certificate or Certificates to be transferred,
split up, combined or exchanged at the principal office or offices of the
Rights Agent designated for such purpose.  Neither the Rights Agent nor the
Company 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





                                       14
<PAGE>   19
of the identity of the Beneficial Owner (or former Beneficial Owner) or
Affiliates or Associates thereof as the Company 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 Certificate, as the case may be, as so requested.
The Company may require payment of a sum sufficient to cover any tax or
governmental charge that may be imposed in connection with any transfer, split
up, combination or exchange of Right Certificate.

                 (b)      Upon receipt by the Company 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 reimbursement to
the Company 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 Company will execute and deliver a new Right
Certificate of like tenor to the Rights Agent for countersignature and delivery
to the registered owner 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
executed, to the Rights Agent at the principal office or offices of the Rights
Agent designated for such purpose, together with payment of the Purchase Price
for each one two-hundredth of a share (or other securities, cash or other
assets, as the case may be) as to which such surrendered Rights are then
exercised, at or prior to the earlier of (i) the Close of Business on July 7,
2006 (the "Final Expiration Date"), (ii) the time at which the rights are
redeemed as provided in Section 23





                                       15
<PAGE>   20
hereof, (iii) the time at which the Rights are exchanged as provided in Section
23A hereof, or (iv) the time at which the Rights expire pursuant to Section
13(d) hereof (the earliest of such times being herein referred to as the
"Expiration Date").

                 (b)      The Purchase Price for each one two-hundredth of a
share of Preferred Stock issued pursuant to the exercise of a Right shall
initially be $200, and shall be subject to adjustment from time to time as
provided in Sections 11 and 13(a) hereof and shall be payable in accordance
with paragraph (c) below.

                 (c)      Upon receipt of a Right Certificate representing
exercisable Rights, with the form of election to purchase and the certificate
duly executed, accompanied by payment, with respect to each Right so exercised,
of the Purchase Price per one two-hundredth of a share of Preferred Stock (or
other shares, securities, cash or other assets, as the case may be) to be
purchased as set forth below and an amount equal to any applicable transfer
tax, the Rights Agent shall, subject to Section 20(k) hereof, thereupon
promptly (i)(A) requisition from any transfer agent of the shares of Preferred
Stock (or make available, if the Rights Agent is the transfer agent for such
shares) certificates for the total number of one two-hundredths of a share of
Preferred Stock to be purchased and the Company hereby irrevocably authorizes
its transfer agent to comply with all such requests, or (B) if the Company
shall have elected to deposit the total number of shares of Preferred Stock
issuable upon exercise of the Rights hereunder with a depositary agent,
requisition from the depositary agent depositary receipts representing such
number of one two-hundredths of a share of Preferred Stock as are to be
purchased (in which case certificates for the shares of Preferred Stock
represented by such receipts shall be deposited by the transfer agent with the
depositary agent) and the Company will direct the depositary agent to comply
with such request, (ii) requisition from the Company the amount of cash, if
any, to be paid in lieu of fractional shares in accordance with Section 14
hereof, (iii) after receipt of such certificates or depositary receipts, cause
the same to be





                                       16
<PAGE>   21
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) after receipt thereof, deliver such cash if any, to or upon
the order of the registered holder of such Right Certificate.  The payment of
the Purchase Price (as such amount may be reduced pursuant to Section
11(a)(iii) hereof) shall be made in cash or by certified bank check or money
order payable to the order of the Company.  In the event that the Company is
obligated to issue other securities (including Common Stock) of the Company,
pay cash and/or distribute other property pursuant to Section 11(a) hereof, the
Company will make all arrangements necessary so that such other securities,
cash and/or other property are available for distribution by the Rights Agent,
if and when appropriate.

                 (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 and 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, subject to the provisions of
Section 14 hereof.

                 (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 Associate or
Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring Person (or
of any such Associate or Affiliate) who becomes a transferee after the
Acquiring Person becomes such, or (iii) a transferee of an Acquiring Person (or
of any such Associate or Affiliate) who becomes a transferee prior to or
concurrently with the Acquiring Person becoming 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 any continuing agreement,
arrangement or understanding regarding the transferred Rights or (B) a transfer
which the Board of Directors of the Company has determined is part of a plan,





                                       17
<PAGE>   22
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 Rights, whether under any provision of this Agreement or otherwise.
The Company shall use all reasonable efforts to ensure 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 Certificate or other Person as a result of its
failure to make any determination 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 Company shall be obligated to
undertake any action with respect to a registered holder of any Right
Certificate upon the occurrence of any purported transfer or 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 assignment or election to
purchase set forth on the reverse side of the Right Certificate surrendered for
such assignment or 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 Company 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
Company or 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 Certificate shall be issued in lieu thereof
except as expressly permitted by any of the provisions of this Agreement.  The
Company 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 Company otherwise than upon the exercise thereof.
The Rights Agent shall deliver all cancelled Right Certificates to the Company,
or shall, at the written request of the Company,





                                       18
<PAGE>   23
destroy such cancelled Right Certificates, and in such case shall deliver a
certificate of destruction thereof to the Company.

                 Section 9.  Reservation and Availability of Capital Stock.
(a)  The Company covenants and agrees that it will cause to be reserved and
kept available out of its authorized and unissued shares of Preferred Stock or
any authorized and issued shares of Preferred Stock held in its treasury (and,
following the occurrence of a Triggering Event, out of its authorized and
unissued shares of Common Stock and/or other securities or out of its
authorized and issued shares and/or other securities held in its treasury), the
number of shares of Preferred Stock (and, following the occurrence of a
Triggering Event, Common Stock and/or other securities), that will be
sufficient to permit the exercise in full of all outstanding Rights.

                 (b)      So long as the shares of Preferred Stock (and,
following the occurrence of a Triggering Event, Common Stock and/or other
securities) issuable and deliverable upon the exercise of the Rights may be
listed on any national securities exchange, the Company shall use its best
efforts to cause, from and 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.

                 (c)      The Company shall use its best efforts to (i) file,
as soon as practicable following the earliest date after the first occurrence
of a Section 11(a)(ii) Event on which the consideration to be delivered by the
Company upon exercise of the Rights has been determined in accordance with
Section 11(a)(iii) hereof, or as soon as is required by law following the
Distribution Date, as the case may be, a registration statement under the
Securities Act of 1933, as amended (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





                                       19
<PAGE>   24
the Act) until the earlier of (A) the date as of which the Rights are no longer
exercisable for such securities, and (B) the date of the expiration of the
Rights.  The Company will also take such action as may be appropriate under, or
to ensure compliance with, the securities or "blue sky" laws of the various
states in connection with the exercisability of the Rights.  The Company may,
acting by resolution of its Board of Directors, temporarily suspend, for a
period of time not to exceed ninety (90) days after the date set forth in
clause (i) of the first sentence of this Section 9(c), the exercisability of
the Rights in order to prepare and file such registration statement and permit
it to become effective.  Upon any such suspension, the Company shall issue a
public announcement stating that the exercisability of the Rights has been
temporarily suspended, as well as a public announcement at such time as the
suspension is no longer in effect.  Notwithstanding any provision of this
Agreement to the contrary, the Rights shall not be exercisable in any
jurisdiction unless the requisite qualification in such jurisdiction shall have
been obtained.

                 (d)      The Company covenants and agrees that it will take
all such action as may be necessary to ensure that all one two-hundredths of a
share of Preferred Stock (and, following the occurrence of a Triggering Event,
Common Stock and/or other securities) delivered upon exercise of Rights shall,
at the time of delivery of the certificates for such shares (subject to payment
of the Purchase Price), be duly and validly authorized and issued and fully
paid and nonassessable.

                 (e)      The Company further covenants and agrees that it will
pay when due and payable any and all federal and state transfer taxes and
charges which may be payable in respect of the issuance or delivery of the
Right Certificates or depository receipts therefor and of any certificates for
a number of one two-hundredths of a share of Preferred Stock (or Common Stock
and/or other securities, as the case may be) upon the exercise of Rights.  The
Company shall not, however, be required to pay any transfer tax which may be
payable in respect of any transfer or delivery of Right Certificates to a
Person other than, or





                                       20
<PAGE>   25
the issuance or delivery of a number of one two-hundredths of a share of
Preferred Stock (or Common Stock and/or other securities, as the case may be)
in respect of a name other than that of, the registered holder of the Right
Certificates evidencing Rights surrendered for exercise or to issue or deliver
any certificates for a number of one two-hundredths of a share of Preferred
Stock (or Common Stock and/or other securities, as the case may be) upon the
exercise of any Rights until such tax shall have been paid (any such tax being
payable by the holder of such Right Certificate at the time of surrender) or
until it has been established to the Company's satisfaction that no such tax is
due.

                 Section 10.  Preferred Stock Record Date.  Each person in
whose name any certificate for a number of one two-hundredths of a share of
Preferred Stock (or Common Stock 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 shares of Preferred Stock (or Common Stock
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 all applicable transfer taxes) was made; provided, however, that if the
date of such surrender and payment is a date upon which the Preferred Stock (or
Common Stock and/or other securities, as the case may be) transfer books of the
Company are closed, such Person shall be deemed to have become the record
holder of such shares (fractional or otherwise) on, and such certificate shall
be dated, the next succeeding Business Day on which the Preferred Stock (or
Common Stock and/or other securities, as the case may be) transfer books of the
Company are open.  Prior to the exercise of the Rights evidenced thereby, the
holder of a Right Certificate shall not be entitled to any rights of a
stockholder of the Company with respect to shares for which the Rights shall be
exercisable, including, without limitation, the right to vote, to receive
dividends or other distributions or to exercise any preemptive rights, and
shall not be entitled to receive any notice of any proceedings of the Company,
except as provided herein.





                                       21
<PAGE>   26

                 Section 11.  Adjustment of Purchase Price, Number and Kind of
Shares or Number of Rights.  The Purchase Price, the number and kind of shares,
or fractions thereof, 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 Company shall at any time after the
         date of this Agreement (A) declare a dividend on the Preferred Stock
         payable in shares of Preferred Stock, (B) subdivide the outstanding
         Preferred Stock, (C) combine the outstanding Preferred Stock into a
         smaller number of shares, or (D) issue any shares of its capital stock
         in a reclassification of the Preferred Stock (including any such
         reclassification in connection with a consolidation or merger in which
         the Company 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 Preferred Stock
         or capital stock, as the case may be, issuable on such date, shall be
         proportionately adjusted so that the holder of any Right exercised
         after such time shall be entitled to receive, upon payment of the
         Purchase Price then in effect, the aggregate number and kind of shares
         of Preferred Stock or capital stock, as the case may be, which, if
         such Right had been exercised immediately prior to such date and at a
         time when the Preferred Stock transfer books of the Company were open,
         he would have owned upon such exercise and been entitled to receive by
         virtue of such dividend, subdivision, combination or reclassification.
         If an event occurs which would require an adjustment under both
         Section 11(a)(i) and Section 11(a)(ii) hereof, 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)
         hereof.





                                       22
<PAGE>   27

                 (ii)  In the event (a "Section 11(a)(ii) Event") that any
         Person, alone or together with its Affiliates and Associates, shall
         become an Acquiring Person, unless the event causing the Person to
         become an Acquiring Person is (1) a transaction set forth in Section
         13(a) hereof, or (2) is an acquisition of shares of Common Stock
         pursuant to a tender offer or an exchange offer for all outstanding
         shares of Common Stock at a price and on terms determined by at least
         a majority of the members of the Board of Directors who are not
         officers of the Company and who are not an Acquiring Person or
         representatives, nominees, Affiliates or Associates of an Acquiring
         Person, after receiving advice from one or more investment banking
         firms, to be (a) at a price which is fair to stockholders (taking into
         account all factors which such members of the Board deem relevant
         including, without limitation, prices which could reasonably be
         achieved if the Company or its assets were sold on an orderly basis
         designed to realize maximum value) and (b) otherwise in the best
         interests of the Company and its stockholders, then proper provision
         shall be made so that each holder of a Right (except as provided below
         and in Section 7(e) hereof) shall thereafter have the right to
         receive, upon exercise thereof at the then current Purchase Price in
         accordance with the terms of this Agreement, in lieu of a number of
         one two- hundredths of a share of Preferred Stock, such number of
         shares of Common Stock of the Company as shall equal the result
         obtained by (x) multiplying the then current Purchase Price by the
         then number of one two-hundredths of a share of Preferred Stock for
         which a Right was exercisable immediately prior to the first
         occurrence of a Section 11(a)(ii) Event whether or not such Right was
         then exercisable, and (y) dividing that product (which, following such
         first occurrence, shall thereafter be referred to as the "Purchase
         Price" for each Right and for all purposes of this Agreement) by 50%
         of the Current Market Price (determined pursuant to Section 11(d)
         hereof) per share of Common Stock on the date of such first occurrence
         (such number of shares, the "Adjustment Shares").  The Company shall
         notify the





                                       23
<PAGE>   28
         Rights Agent as to any Persons who are deemed by the Company to be
         Acquiring Persons or Associates, Affiliates or transferees (as
         described in subparagraphs (ii) and (iii) of Section 7(e) hereof) of
         such Persons and shall identify any Rights pertaining thereto.

                 (iii)  In lieu of issuing shares of Common Stock in accordance
         with Section 11(a)(ii) hereof, the Company, acting by resolution of
         its Board of Directors, may, and in the event that the number of
         shares of Common Stock which are authorized by the Company's
         Certificate of Incorporation but not outstanding or reserved for
         issuance for purposes other than upon exercise of the Rights are not
         sufficient to permit the exercise in full of the rights in accordance
         with Section 11(a)(ii) hereof, the Company acting by resolution of its
         Board of Directors shall:  (A) determine the excess of (1) the value
         of the Adjustment Shares issuable upon the exercise of a Right (the
         "Current Value") over (2) the Purchase Price attributable to each
         Right (such excess, the "Spread"), and (B) with respect to each Right
         (subject to Section 7(e) hereof), make adequate provision to
         substitute for the Adjustment Shares, upon payment of the applicable
         Purchase Price, (1) cash, (2) a reduction in the Purchase Price, (3)
         Common Stock or other equity securities of the Company (including,
         without limitation, shares, or units of shares, of preferred stock
         which the Board of Directors of the Company has deemed to have the
         same value as shares of Common Stock (such shares of preferred stock,
         "Common Stock Equivalents")), (4) debt securities of the Company, (5)
         other assets, or (6) any combination of the foregoing having an
         aggregate value equal to the Current Value, where such aggregate value
         has been determined by the Board of Directors of the Company based
         upon the advice of a nationally recognized investment banking firm
         which has theretofore performed no services for the Company or any
         subsidiary of the Company in the past five years; provided, however,
         if the Company shall not have made adequate provision to





                                       24
<PAGE>   29
         deliver value pursuant to clause (B) above within thirty (30) days
         following the later of (x) the first occurrence of a Section 11(a)(ii)
         Event and (y) the date on which the Company's right of redemption
         pursuant to Section 23 expires (the later of (x) and (y) being
         referred to herein as the "Section 11(a)(ii) Trigger Date"), then the
         Company shall be obligated to deliver, upon the surrender for exercise
         of a Right and without requiring payment of the Purchase Price, shares
         of Common Stock (to the extent available) and then, if necessary,
         cash, securities and/or assets that in the aggregate have a value
         equal to the Spread.  If, after the occurrence of a Section 11(a)(ii)
         Event, the number of shares of Common Stock that are authorized by the
         Company's Certificate of Incorporation but not outstanding or reserved
         for issuance for purposes other than upon exercise of the Rights are
         not sufficient to permit exercise in full of the Rights in accordance
         with Section 11(a)(ii) hereof and the Company, acting by resolution of
         its Board of Directors, shall determine in good faith that it is
         likely that sufficient additional shares of Common Stock could be
         authorized for issuance upon exercise in full of the Rights, the
         thirty (30) day period set forth above may be extended to the extent
         necessary, but not more than ninety (90) days after the Section
         11(a)(ii) Trigger Date, in order that the Company may seek shareholder
         approval for the authorization of such additional shares (such period,
         as it may be extended, the "Substitution Period").  To the extent that
         the Company determines that some action need be taken pursuant to the
         first and/or second sentences of this Section 11(a)(iii), the Company
         (x) shall provide, subject to Section 7(e) hereof, that such action
         shall apply uniformly to all outstanding Rights, and (y) may suspend
         the exercisability of the Rights until the expiration of the
         Substitution Period in order to seek any authorization of additional
         shares and/or to decide the appropriate form of distribution to be
         made pursuant to the first sentence of this Section 11(a)(iii) and to
         determine the value thereof.  In the event of any such suspension, the
         Company shall issue a public an-





                                       25
<PAGE>   30
         nouncement stating that the exercisability of the Rights has been
         temporarily suspended, as well as a public announcement at such time
         as the suspension is no longer in effect.  For purposes of this
         Section 11(a)(iii), the value of the Common Stock shall be the Current
         Market Price (as determined pursuant to Section 11(d) hereof) per
         share of the Common Stock on the occurrence of the first Section
         11(a)(ii) Trigger Date and the per share or per unit value of any
         "Common Stock Equivalent" shall be deemed to have the same value as
         the Common Stock on such date.

                 (b)      In the event that the Company shall fix a record date
for the issuance of rights, options or warrants to all holders of Preferred
Stock entitling them to subscribe for or purchase (for a period expiring within
forty-five (45) calendar days after such record date) Preferred Stock (or
shares having the same rights, privileges and preferences as the shares of
Preferred Stock ("Equivalent Preferred Stock")) or securities convertible into
Preferred Stock or Equivalent Preferred Stock at a price per share of Preferred
Stock or per share of Equivalent Preferred Stock (or having a conversion price
per share, if a security convertible into Preferred Stock or equivalent
preferred stock) less than the Current Market Price (as determined pursuant to
Section 11(d) hereof) per share of Preferred Stock 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 shares of
Preferred Stock outstanding on such record date, plus the number of shares of
Preferred Stock which the aggregate offering price of the total number of
shares of Preferred Stock and/or Equivalent Preferred Stock so to be offered
(and/or the aggregate initial conversion price of the convertible securities so
to be offered) would purchase at such Current Market Price, and the denominator
of which shall be the number of shares of Preferred Stock outstanding on such
record date, plus the number of additional shares of Preferred Stock and/or
equivalent preferred stock to be offered for subscription or purchase (or into
which the convertible





                                       26
<PAGE>   31
securities so to be offered are initially convertible).  In case such
subscription price may be paid by delivery of consideration part or all of
which may be in a form other than cash, the value of such consideration shall
be as determined in good faith by the Board of Directors of the Company whose
determination shall be described in a statement filed with the Rights Agent and
shall be binding on the Rights Agent and the holders of the Rights.  Shares of
Preferred Stock owned by or held for the account of the Company 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 Company shall fix a record date for a
distribution to all holders of Preferred Stock (including any such distribution
made in connection with a consolidation or merger in which the Company is the
continuing corporation) of evidences of indebtedness, cash (other than a
regular quarterly cash dividend out of the earnings or retained earnings of the
Company), assets (other than a dividend payable in Preferred Stock, but
including any dividend payable in stock other than Preferred Stock) 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 Current
Market Price (as determined pursuant to Section 11(d) hereof) per share of
Preferred Stock on such record date, less the fair market value (as determined
in good faith by the Board of Directors of the Company whose determination
shall be described in a statement filed with the Rights Agent) of the portion
of the cash, assets or evidences of indebtedness so to be distributed or of
such subscription rights or warrants applicable to a share of Preferred Stock
and the denominator of which shall be such Current Market Price (as determined
pursuant to Section 11(d) hereof) per share of Preferred Stock.  Such adjust-





                                       27
<PAGE>   32
ments 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 have been in effect if such
record date had not been fixed.

                 (d) (i)  For the purpose of any computation hereunder, the
         "Current Market Price" per share of Common Stock on any date shall be
         deemed to be the average of the daily closing prices per share of such
         Common Stock for the thirty (30) consecutive Trading Days (as such
         term is hereinafter defined) immediately prior to such date, provided,
         however, that in the event that the Current Market Price per share of
         the Common Stock is determined during a period following the
         announcement by the issuer of such Common Stock of (A) a dividend or
         distribution on such Common Stock payable in shares of such Common
         Stock or securities convertible into shares of such Common Stock
         (other than the Rights), or (B) any subdivision, combination or
         reclassification of such Common Stock, and prior to the expiration of
         the requisite thirty (30) Trading Days or ten (10) Trading Days, as
         set forth above, after 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 Market
         Price shall be properly adjusted to take into account ex-dividend
         trading.  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 shares of Common Stock 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 shares of Common Stock are listed or admitted to
         trading or, if the shares of Common Stock are not listed or admitted
         to trading on any national





                                       28
<PAGE>   33
         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 Quotation System ("NASDAQ") or such other system then
         in use, or, if on any such date the shares of Common Stock 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 Common Stock selected by the Board of Directors of the
         Company.  If on any such date no market maker is making a market in
         the Common Stock, the fair value of such shares on such date as
         determined in good faith by the Board of Directors of the Company
         shall be used.  The term "Trading Day" shall mean a day on which the
         principal national securities exchange on which the shares of Common
         Stock are listed or admitted to trading is open for the transaction of
         business or, if the shares of Common Stock are not listed or admitted
         to trading on any national securities exchange but are quoted on
         NASDAQ, a day on which NASDAQ is in operation or if the shares of
         Common Stock are neither listed or admitted to trading on any national
         securities exchange nor quoted on NASDAQ, a Business Day.  If the
         current per share market price of the Common Stock cannot be
         determined in the manner provided above, or the Common Stock is not
         publicly held or not so listed or traded, Current Market Price per
         share shall mean the fair value per share as determined in good faith
         by the Company, acting by resolution of the Board of Directors, whose
         determination shall be described in a statement filed with the Rights
         Agent and shall be conclusive for all purposes.

                 (ii)  For the purpose of any computation hereunder, the
         "Current Market Price" per share of Preferred Stock shall be
         determined in the same manner as set forth for the Common Stock in
         Section 11(d)(i) hereof (other than the last sentence thereof).  If
         the Current Market Price per share of Preferred Stock cannot be
         determined in the manner provided above or if the Preferred Stock is
         not publicly held or listed or





                                       29
<PAGE>   34
         traded in a manner described in Section 11(d)(i) hereof, the "Current
         Market Price" per share of Preferred Stock shall be conclusively
         deemed to be an amount equal to 100 (as such number may be
         appropriately adjusted for such events as stock splits, stock
         dividends and recapitalizations with respect to the Common Stock
         occurring after the date of this Agreement) multiplied by the Current
         Market Price per share of the Common Stock.  If neither the Common
         Stock nor the Preferred Stock is publicly held or so listed or traded,
         "Current Market Price" per share of the Preferred Stock shall mean the
         fair value per share as determined in good faith by the Board of
         Directors of the Company acting by resolution, whose determination
         shall be described in a statement filed with the Rights Agent and
         shall be conclusive for all purposes.  For all purposes of this
         Agreement, the "Current Market Price" of one two-hundredth of a share
         of Preferred Stock shall be equal to the "Current Market Price" of one
         share of Preferred Stock divided by 200.

                 (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 one percent (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 ten-thousandth of a share
of Common Stock or other share or nearest one- millionth of a share of
Preferred Stock, 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 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
Company other





                                       30
<PAGE>   35
than Preferred Stock, thereafter the number of such other shares so receivable
upon exercise of any Right, the number of Rights outstanding, and the Purchase
Price thereof 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 Stock contained in Sections 11(a), (b), (c), (e), (g), (h), (i),
(j), (k) and (m), and the provisions of Sections 7, 9, 10, 13 and 14 with
respect to the Preferred Stock shall apply on like terms to any such other
shares, provided, however, that the Company shall not be liable for its
inability or failure to reserve and keep available for issuance upon exercise
of the Rights pursuant to Section 11(a)(ii) a number of shares of Common Stock
greater than the number then authorized by the Certificate of Incorporation of
the Company but not outstanding or reserved for any other purpose.

                 (g)      All rights originally issued by the Company
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 two-hundredths of a share of Preferred Stock purchasable from time to time
hereunder upon exercise of the Rights, all subject to further adjustment as
provided herein.

                 (h)      Unless the Company shall have exercised its election
as provided in Section 11(i), upon each adjustment of the Purchase Price as a
result of the calculations made in Sections 11(b) and (c), each Right
outstanding immediately prior to the making of such adjustment shall thereafter
evidence the right to purchase, at the adjusted Purchase Price, that number of
one two-hundredths of a share of Preferred Stock (calculated to the nearest
one- millionth) obtained by (i) multiplying (A) the number of one
two-hundredths of a share covered by a Right immediately prior to such
adjustment of the Purchase Price by (B) the Purchase Price in effect
immediately prior to such adjustment of the Purchase Price, and (ii) dividing
the product so obtained by the Purchase Price in effect immediately after such
adjustment of the Purchase Price.





                                       31
<PAGE>   36

                 (i)      The Company 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 two-hundredths of a share of Preferred Stock
purchasable upon the exercise of a Right.  Each of the Rights outstanding after
the adjustment in the number of Rights shall be exercisable for the number of
one two-hundredths of a share of Preferred Stock 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 ten-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 Company 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.  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(i), the Company shall, as promptly as practicable, cause to be
distributed to holders of record of Right Certificates on such record date
Right Certificate 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 Company, 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 Company, 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 may bear, at the option of the Company, the adjusted
Purchase Price) and shall be registered in the names of the holders of record
of Right Certificates on the record date specified in the public announcement.





                                       32
<PAGE>   37

                 (j)      Irrespective of any adjustment or change in the
Purchase Price or the number of shares, or fraction thereof, issuable upon the
exercise of the Rights, the Right Certificates theretofore and thereafter
issued may continue to express the Purchase Price per one two-hundredths of a
share and the number of one two-hundredth of a share which were expressed in
the initial Right Certificates issued hereunder.

                 (k)      Before taking any action that would cause an
adjustment reducing the Purchase Price below the then stated value, if any, of
the one two-hundredth of a share of Preferred Stock issuable upon exercise of
the Rights, the Company shall take any corporate action which may, in the
opinion of its counsel, be necessary in order that the Company may validly and
legally issue fully paid and nonassessable shares of Preferred Stock at such
adjusted Purchase Price.

                 (l)      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 Company may elect to defer until the occurrence of
such event the issuance to the holder of any Right exercised after such record
date the Preferred Stock, or a fraction thereof, and other capital stock or
securities of the Company, if any, issuable upon such exercise over and above
the Preferred Stock and other capital stock or securities of the Company, if
any, issuable upon such exercise on the basis of the Purchase Price in effect
prior to such adjustment; provided, however, that the Company shall deliver to
such holder a due bill or other appropriate instrument evidencing such holder's
right to receive such additional shares (fractional or otherwise) or securities
upon the occurrence of the event requiring such adjustment.

                 (m)      Anything in this Section 11 to the contrary
notwithstanding, the Company, acting by resolution of its Board of Directors,
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 in their good faith judgment the Board of





                                       33
<PAGE>   38
Directors of the Company shall determine to be advisable in order that any (i)
consolidation or subdivision of the Preferred Stock, (ii) issuance wholly for
cash of any shares of Preferred Stock at less than the current market price,
(iii) issuance wholly for cash of shares of Preferred Stock or securities which
by their terms are convertible into or exchangeable for shares of Preferred
Stock, (iv) stock dividends or (v) issuance of rights, options or warrants
referred to in this Section 11, hereafter made by the Company to holders of its
Preferred Stock shall not be taxable to such stockholders.

                 (n)      The Company 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 Company in a transaction which complies with
Section 11(o) hereof), (ii) merge with or into any other Person (other than a
Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof), or (iii) sell or transfer (or permit any Subsidiary to sell or
transfer), in one transaction, or a series of related transactions, assets,
cash flow, or earning power aggregating more than 50% of the assets, cash flow,
or earning power of the Company and its Subsidiaries (taken as a whole) to any
other Person or Persons (other than the Company and/or any of its Subsidiaries
in one or more transactions each of which complies with Section 11(o) hereof),
if (x) at the time of or immediately after such consolidation, merger or sale
there are any rights, warrants or other instruments or securities outstanding
or agreements in effect that would substantially 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 shareholders 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.

                 (o)      The Company covenants and agrees that, after the
Distribution Date, it will not, except as permitted by Section 23 or Section 26
hereof, take (or permit any Sub-





                                       34
<PAGE>   39
sidiary to take) any action if at the time such action is taken it is
reasonably foreseeable that such action will diminish substantially or
otherwise eliminate the benefits intended to be afforded by the Rights.

                 (p)      Anything in this Agreement to the contrary
notwithstanding, in the event that the Company shall at any time after the date
of this Agreement and prior to the Distribution Date (i) declare a dividend on
the outstanding shares of Common Stock payable in shares of Common Stock (by
reclassification or otherwise than by payment of dividends in such Common
Stock); (ii) subdivide the outstanding shares of Common Stock  or (iii) combine
the outstanding shares of Common Stock into a smaller number of shares, then in
any such case, the number of Rights associated with each share of Common Stock
then outstanding, or issued or delivered thereafter but prior to the
Distribution Date, shall be proportionately adjusted so that the number of
Rights thereafter associated with each share of Common Stock following any such
event shall equal the result obtained by multiplying the number of Rights
associated with each share of Common Stock immediately prior to such event by a
fraction the numerator which shall be the total number of shares of Common
Stock outstanding immediately prior to the occurrence of the event and the
denominator of which shall be the total number of shares of Common Stock
outstanding immediately following the occurrence of such event and action shall
be taken such that each share of Common Stock outstanding immediately after
such event shall have issued with respect to it that number of Rights which
each share of such Common Stock outstanding immediately prior to such event had
issued with respect to it.  The adjustments provided for in this Section 11(p)
shall be made successively whenever such dividend is declared or paid or such a
subdivision, combination, or consolidation is effected.  If an event occurs
that would require an adjustment under Section 11(a)(ii) hereof and this
Section 11(p), the adjustments provided for in this Section 11(p) shall be in
addition and prior to any adjustment required pursuant to Section 11(a)(ii).





                                       35
<PAGE>   40

                 Section 12.  Certificate of Adjusted Purchase Price or Number
of Shares.  Whenever an adjustment is made as provided in Section 11 and
Section 13 hereof, the Company shall (a) promptly prepare a certificate setting
forth such adjustment and a brief statement of the facts accounting for such
adjustment, (b) promptly file with the Rights Agent, and with each transfer
agent for the Preferred Stock and the Common Stock, a copy of such certificate,
and (c) mail a brief summary thereof to each holder of a Right Certificate (or,
if prior to the Distribution Date, to each holder of a certificate representing
shares of Common Stock) in accordance with Section 25 hereof.  Notwithstanding
the foregoing sentence, the failure of the Company to make such certificates or
give such notice shall not affect the validity or the force or effect of the
requirement for such adjustment.  The Rights Agent shall be fully protected in
relying on any such certificate and on any adjustment therein contained.  Any
adjustment to be made pursuant to Sections 11 and 13 hereof shall be effective
as of the date of the event giving rise to such adjustment.

  Section 13.  Consolidation, Merger or Sale or Transfer of Assets or Earning
               Power.

                 (a)      In the event (a Section 13 Event) that, following the
Stock Acquisition Date, directly or indirectly, (x) the Company shall
consolidate with, or merge with and into, any other Person (other than a
Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof), and the Company shall not be the continuing or surviving corporation
of such consolidation, combination or merger, (y) any Person (other than a
Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof) shall consolidate with, or merge with or into, the Company, and the
Company shall be the continuing or surviving corporation of such consolidation
or merger and, in connection with such consolidation or merger, all or part of
the outstanding shares of Common Stock shall be changed into or exchanged for
stock or other securities of the Company or any other Person or cash or any
other property, or (z) the Company shall sell or otherwise transfer (or one or
more of its Subsidiaries shall sell or otherwise





                                       36
<PAGE>   41
transfer), in one transaction or a series of related transactions, assets,
earning power or cash flow aggregating more than 50% of the assets, earning
power or cash flow of the Company and its Subsidiaries (taken as a whole and
calculated on the basis of the Company's most recent regularly prepared
financial statement) to any Person or Persons (other than the Company or any
Subsidiary of the Company in one or more transactions each of which complies
with Section 11(o) hereof), then, and in each such case, except as contemplated
by Section 13(d) hereof, proper 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 the then current
Purchase Price in accordance with the terms of this Agreement, such number of
validly authorized and issued, fully paid, non-assessable and freely tradeable
shares of Common Stock of the Principal Party (as such term is hereinafter
defined), not subject to any liens, encumbrances, rights of call, rights of
first refusal or other adverse claims, as shall be equal to the result obtained
by (1) multiplying the then current Purchase Price by the number of one
two-hundredths of a share of Preferred Stock for which a Right was exercisable
immediately prior to the first occurrence of a Section 13 Event (or, if a
Section 11(a)(ii) Event has occurred prior to the first occurrence of a Section
13 Event, multiplying the number of such one two-hundredths of a share of
Preferred Stock for which a Right was exercisable immediately prior to the
first occurrence of a Section 11(a)(ii) Event by the Purchase Price in effect
immediately prior to such first occurrence), and dividing that product (which,
following the first occurrence of a Section 13 Event, shall be referred to as
the "Purchase Price" for each Right and for all purposes of this Agreement) by
(2) 50% of the Current Market Price (determined pursuant to Section 11(d)(i)
hereof) per share of the Common Stock of such Principal Party on the date of
consummation of such merger, consolidation, sale or transfer; (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 Company pursuant
to this Agreement; (iii) the term "Company" shall thereafter be deemed to refer
to such Principal Party, it





                                       37
<PAGE>   42
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; (iv) such Principal Party shall take such steps (including, but not
limited to, the reservation of a sufficient number of shares of its Common
Stock in accordance with Section 9 hereof) 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 possible,
in relation to its shares of Common Stock thereafter deliverable upon the
exercise of the Rights; and (v) the provisions of Section 11(a)(ii) hereof
shall be of no effect following the first occurrence of any Section 13 Event.

                 (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 shares of Common Stock of the
         Company 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; 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, cash flow, or earning
         power transferred pursuant to such transaction or transactions;

provided, however, that in any such case, (1) if the Common Stock of such
Person is not at such time and has 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
Stock of which is and has been so registered, "Principal Party" shall refer to
such other Person; and (2) in case such Person is a Subsidiary, directly or
indirectly, of more than one Person, the Common Stocks of two or more of which
are and have been so registered, "Principal Party" shall refer to whichever of
such Persons is the





                                       38
<PAGE>   43
issuer of the Common Stock having the greatest aggregate market value.

                 (c)      The Company shall not consummate any such
consolidation, merger, sale or transfer unless the Principal Party shall have a
sufficient number of authorized shares of its Common Stock 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 Company 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 or sale of assets mentioned in paragraph
(a) of this Section 13, the Principal Party will

                 (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 Expiration Date; and

                 (ii)  deliver to holders of the Rights historical financial
         statements for the Principal Party and each of its Affiliates 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.  In the event that a Section 13
Event shall occur at any time after the occurrence of a Section 11(a)(ii)
Event, the Rights which have not theretofore been exercised shall thereafter
become exercisable in the manner described in Section 13(a).





                                       39
<PAGE>   44

                 (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 shares of Common Stock
pursuant to a tender offer or exchange offer for all outstanding shares of
Common Stock, which complies with the provisions of Section 11(a)(ii) hereof
(or a wholly owned subsidiary of any such Person or Persons), (ii) the price
per share of Common Stock offered in such transaction is not less than the
price per share of Common Stock paid to all holders of Common Stock whose
shares were purchased pursuant to such tender offer or exchange offer, and
(iii) the form of consideration being offered to the remaining holders of
Common Stock pursuant to such transaction is the same as the form of
consideration paid pursuant to such 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 Company 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 Certificate 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 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 have been otherwise issuable.  The closing price of the
Rights 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





                                       40
<PAGE>   45
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 Company acting by resolution of its Board of Directors.
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
Company acting by resolution of its Board of Directors shall be used.

                 (b)      The Company shall not be required to issue fractions
of shares of Preferred Stock (other than fractions which are integral multiples
of one two-hundredth of a share of Preferred Stock) upon exercise of the Rights
or to distribute certificates which evidence fractional shares of Preferred
Stock (other than fractions which are integral multiples of one two-hundredth
of a share of Preferred Stock).  Fractions of Preferred Stock in integral
multiples of one two-hundredth of a share of Preferred Stock may, at the
election of the Company, be evidenced by depository receipts, pursuant to an
appropriate agreement between the Company and a depository selected by it,
provided that such agreement shall provide that the holders of depository
receipts shall have all the rights, privileges and preferences to which they
are entitled as beneficial owners of the Preferred Stock.  In lieu of
fractional shares of Preferred Stock that are not integral multiples of one
two-hundredth of a share of Preferred Stock, the Company may pay to the
registered holders of Right Certificate 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 two-hundredth of a share of Preferred Stock.  For purposes
of this Section 14(b), the current market value of one two-hundredth of a share
of Preferred Stock shall be





                                       41
<PAGE>   46
one two-hundredth of the closing price of a share of Preferred Stock (as
determined pursuant to Section 11(d)(ii) hereof) for the Trading Day
immediately prior to the date of such exercise.

                 (c)      Following the occurrence of a Triggering Event, the
Company shall not be required to issue fractions of shares of Common Stock upon
exercise of the Rights or to distribute certificates which evidence fractional
shares of Common Stock.  In lieu of fractional shares of Common Stock, the
Company may pay to the registered holders of Right Certificate 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 (1) share of Common Stock.  For
purposes of this Section 14(c), the current market value of one share of Common
Stock shall be the closing price of one share of Common Stock (as determined
pursuant to Section 11(d)(i) hereof) for the Trading Day immediately prior to
the date of such exercise.

                 (d)      The holder of a Right by the acceptance of the Rights
expressly waives his right to receive any fractional Rights or any fractional
shares upon exercise of a Right, except as permitted by this Section 14.

                 Section 15.  Rights of Action.  All rights of action in
respect of this Agreement, except the rights of action vested in the Rights
Agent pursuant to Section 18 hereof, are vested in the respective registered
holders of the Right Certificates (and, prior to the Distribution Date, the
registered holders of the Common Stock); and any registered holder of any Right
Certificate (or, prior to the Distribution Date, of the Common Stock), 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 Stock), may, in his own
behalf and for his own benefit, enforce, and may institute and maintain any
suit, action or proceeding against the Company 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





                                       42
<PAGE>   47
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 shall be entitled to specific performance of the obligations
hereunder and injunctive relief against actual or threatened violations of the
obligations hereunder of any Person subject to this Agreement.

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

                 (a)      prior to the Distribution Date, the Rights shall be
evidenced by the certificates for shares of Common Stock registered in the name
of the holders of such shares (which certificates for shares of Common Stock
shall also constitute certificates for Rights) and each Right will be
transferable only in connection with the transfer of Common Stock;

                 (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
purposes, duly endorsed or accompanied by a proper instrument of transfer and
with the appropriate forms and certificates fully executed;

                 (c)      subject to Section 6(a) and Section 7(f) hereof, the
Company and the Rights Agent may deem and treat the person in whose name a
Right Certificate (or, prior to the Distribution Date, the associated Common
Stock 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 Stock certificate made by
anyone other than the Company or the Rights Agent) for all purposes whatsoever,
and neither the Company 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





                                       43
<PAGE>   48

                 (d)      notwithstanding anything in this Agreement to the
contrary, neither the Company nor the Rights Agent shall have any liability to
any holder of 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 obligations; provided, however, the Company
must use its best efforts to have any such order, decree or ruling lifted or
otherwise overturned as soon as practicable.

                 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 number
of one two-hundredths of a share of Preferred Stock or any other securities of
the Company 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 Company 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 24 hereof), or to receive dividends 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.  (a)  The Company
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 and execution of this Agreement and the exercise and
performance of its





                                       44
<PAGE>   49
duties hereunder.  The Company also agrees to indemnify the Rights Agent for,
and to hold it harmless against, any loss, liability, or expense, incurred
without negligence, bad faith or willful misconduct on the part of the Rights
Agent, for anything done or omitted by the Rights Agent in connection with the
acceptance and administration of this Agreement, including the costs and
expenses of defending against any claim of liability in the premises.

                 (b)      The 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 Stock or for other securities of
the Company, instrument of assignment or transfer, power of attorney,
endorsement, affidavit, letter, notice, direction, consent, certificate,
statement, or other paper or documents 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.  (a)  Any corporation into which the Rights Agent or any
successor Rights Agent may be merged or with which it may be consolidated, or
any corporation resulting from any merger or consolidation to which the Rights
Agent or any successor Rights Agent shall be a party, or any corporation
succeeding to the corporate trust business of the Rights Agent or any successor
Rights Agent, shall be the successor to the Rights Agent under this Agreement
without the executing or filing of any paper or any further act on the part of
any of the parties hereto; provided, however, that such corporation would be
eligible for appointment as a successor Rights Agent under the provisions of
Section 21 hereof.  The purchase of all or substantially all of the Rights
Agent's assets employed in the performance of transfer agent activities shall
be deemed a merger or consolidation for purposes of this Section 19.  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





                                       45
<PAGE>   50
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.

                 (b)      In case at any time the name of the Rights Agent
shall be changed and at such time any of the Right Certificate 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 the duties and obligations imposed by this Agreement upon the
following terms and conditions, by all of which the Company 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 Company), and the opinion of such counsel
         shall be full and complete authorization and protection to the Rights
         Agent as to any action taken or omitted by it in good faith and in
         accordance with such 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 any
         Acquiring Person and the determination of "Current Market Price") be
         proved or established by the Company prior to taking or suffering any
         action hereunder, such fact or matter (unless other evidence in
         respect thereof be herein





                                       46
<PAGE>   51
         specifically prescribed) may be deemed to be conclusively proved and
         established by a certificate signed by the Chairman of the Board, the
         President, any Senior Vice President or any Vice President, the
         Treasurer, any Assistant Treasurer, the Secretary or any Assistant
         Secretary of the Company and delivered to the Rights Agent; and such
         certificates shall be full authorization to the Rights Agent for any
         action taken or suffered 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.

                 (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 or be required to verify the
         same (except as to its countersignature on such Right Certificates),
         but all such statements and recitals are and shall be deemed to have
         been made by the Company 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 Company of any covenant or condition
         contained in this Agreement or in any Right Certificate; nor shall it
         be responsible for 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 Certificate after actual
         notice of any such adjustment); nor shall it by any act hereunder be
         deemed to make any representation or warranty as to the authorization
         or reservation of any shares of Common





                                       47
<PAGE>   52
         Stock or Preferred Stock to be issued pursuant to this Agreement or
         any Right Certificate or as to whether any shares of Common Stock or
         Preferred Stock will, when so issued, be validly authorized and
         issued, fully paid and nonassessable.

                 (f)      The Company 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 the Chairman of the Board, the President, any Senior
         Vice President or any Vice President, the Secretary, any Assistant
         Secretary, the Treasurer or any Assistant Treasurer of the Company,
         and to apply to such officers for advice or instructions in connection
         with its duties, and it shall not be liable for any action taken or
         suffered to be taken by it in good faith in accordance with
         instructions of any such officer.

                 (h)      The Rights Agent any stockholder, director, officer
         or employee of the Rights Agent may buy, sell or deal in any of the
         Rights or other securities of the Company or become pecuniarily
         interested in any transaction in which the Company may be interested,
         or contract with or lend money to the Company 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 Company or for any other legal entity,
         except that it may not act for an Acquiring Person in an investment
         banking capacity, or otherwise assist an Acquiring Person in ways
         hostile to the Company, without the consent of the Company.





                                       48
<PAGE>   53

                 (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, omission,
         default, neglect or misconduct of any such attorneys or agents or for
         any loss to the Company resulting from any such act, omission,
         default, neglect or misconduct; provided, however, 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 Right 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 either not been completed or indicates an affirmative
         response to clause 1 and/or 2 thereof, the Rights Agent shall not take
         any further action with respect to such requested exercise or transfer
         without first consulting with the Company.

                 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 Company, and
to each transfer agent of the Common Stock and Preferred Stock, by registered,
express, or certified mail, and to the holders of the Right Certificates by
first-class mail.  The Company may remove the Rights Agent or any successor
Rights Agent upon thirty (30) 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 Stock and Preferred Stock, by registered, express, or certified
mail,





                                       49
<PAGE>   54
and to the 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 Company shall appoint a successor to the Rights Agent.  If the
Company shall fail to make such appointment within a period of thirty (30) 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 Company), then any 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 Company or by such a court, shall be a
corporation organized and doing business under the laws of the United States or
of the State of New York (or of any other state of the United States so long as
such corporation is authorized to do business as a banking institution in the
State of New York), in good standing, having a principal office in the State of
New York, which is authorized under such laws to exercise corporate trust
powers and is subject to supervision or examination by federal or state
authority and which has at the time of its appointment as Rights Agent a
combined capital and surplus of at least $100,000,000.  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 Company shall file notice thereof in writing with the
predecessor Rights Agent and each transfer agent of the Common Stock and the
Preferred Stock, 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.





                                       50
<PAGE>   55

                 Section 22.  Issuance of New Right Certificates.
Notwithstanding any of the provisions of this Agreement or of the Rights to the
contrary, the Company may, at its option, issue new Right Certificates
evidencing Rights in such form as may be approved by resolution of 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 shares of
Common Stock following the Distribution Date and prior to the redemption or
expiration of the Rights, the Company (a) shall, with respect to shares of
Common Stock 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 hereinafter issued by the Company and (b) may, in any
other case, if deemed necessary or appropriate by the Board of Directors of the
Company issue Right Certificates representing the appropriate number of Rights
in connection with such issuance or sale; provided, however, that (i) no such
Right Certificates shall be issued if, and to the extent that, the Company
shall be advised by counsel that such issuance would create a significant risk
of material adverse tax consequences to the Company or the Person to whom such
Right Certificate would be issued, and (ii) no such Right Certificates shall be
issued if, and to the extent that, appropriate adjustment shall otherwise have
been in lieu of the issuance thereof.

                 Section 23.  Redemption and Termination.  (a)  The Company
may, by resolution of its Board of Directors, at its option, at any time prior
to the earlier of (i) the Stock Acquisition Date or (ii) the Close of Business
on the Final Expiration Date, redeem all but not less than all of the then
outstanding Rights at a redemption price of $0.01 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").  The Company may, at its
option, pay the Redemption Price in cash, shares of Common Stock (based on the
Current





                                       51
<PAGE>   56
Market Price of the Common Stock at the time of redemption) or any other form
of consideration deemed appropriate by the Board of Directors.

                 (b)      Immediately upon the action of the Board of Directors
of the Company ordering the redemption of the  Rights (or at such time
subsequent to such action as the Board of Directors may determine), 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. Within 10 days after the action of the Board
of Directors ordering the redemption of the Rights, the Company shall give
notice of such redemption to the Rights Agent and the holders of the then
outstanding Rights by mailing such notice to all such holders at each holder's
last address as it appears 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 Stock.  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 redemption will state the method by which the payment of the
Redemption Price will be made.  Neither the Company nor any of its Affiliates
or Associates may redeem, acquire or purchase 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 repurchase of the Common Stock of the Company prior
to the Distribution Date.

                 Section 23A.  Exchange.  (a)  The Board of Directors of the
Company 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 void pursuant to the
provisions of Section 7(e)) for Common Stock at an exchange ratio of one share
of Common Stock 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





                                       52
<PAGE>   57
Company, any wholly owned Subsidiary of the Company, any employee benefit plan
of the Company or any such Subsidiary, or any entity holding Common Stock as a
fiduciary for or pursuant to the terms of any such employee benefit plan),
together with all Affiliates and Associates of such Person, becomes the
Beneficial Owner of 50% or more of the Common Stock then outstanding.

                 (b)  Immediately upon the action of the Board of Directors of
the Company ordering the exchange of any Rights pursuant to paragraph (a) of
this Section 23A, evidence of which shall have been filed with the Rights
Agent, and without any further action and without any notice, the right to
exercise such Rights shall terminate and the only right thereafter of a holder
of such Right shall be to receive that number of shares of Common Stock equal
to the number of such Rights held by such holder multiplied by the Exchange
Ratio.  The Company shall promptly give public notice of any such exchange;
provided, however, that the failure to give, or any defect in, such notice
shall not affect the validity of such exchange.  The Company 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 Stock 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 void
pursuant to the provisions of Section 7(e) hereof) held by each holder of
Rights.

                 (c)      In any exchange pursuant to this Section 23A, the
Company, at its option, may substitute shares of Preferred Stock (or any other
series of preferred stock of the Company containing terms substantially similar
to the terms of the Preferred Stock) for some or all of the shares of Common
Stock exchangeable for Rights, at the initial rate of one two-hundredth of a
share of Preferred Stock (or of such other series of preferred stock in the
Company) for





                                       53
<PAGE>   58
each share of Common Stock, as appropriately adjusted to reflect adjustments in
the voting rights of the Preferred Stock pursuant to the terms thereof, so that
the fraction of a share of Preferred Stock (or of such other series of
preferred stock of the Company) delivered in lieu of each share of Common Stock
shall have the same voting rights as one share of Common Stock.

                 (d)  In the event that there shall not be sufficient shares of
Common Stock or Preferred Stock (or any other series of preferred stock of the
Company containing terms substantially similar to the terms of the Preferred
Stock) issued but not outstanding or authorized but unissued to permit any
exchange of Rights as contemplated in accordance with this Section 23A, the
Company shall take all such action as may be necessary to authorize additional
shares of Common Stock or Preferred Stock (or such other series of preferred
stock of the Company) for issuance upon exchange of the Rights.

                 (e)  The Company shall not be required to issue fractions of
Common Stock or to distribute certificates which evidence fractional Common
Stock.  In lieu of such fractional shares, the Company shall pay to the
registered holders of the Right Certificates with regard to which such
fractional shares would otherwise be issuable an amount in cash equal to the
same fraction of the current market value of a whole share of Common Stock.
For the purposes of this paragraph (e), the current market value of a whole
share of Common Stock shall be the closing price of a share of Common Stock (as
determined pursuant to Section 11(d) hereof) for the Trading Day immediately
prior to the date of exchange pursuant to this Section 23A.

                 Section 24.  Notice of Certain Events.  (a)  In case the
Company shall propose (i) to pay any dividend payable in stock of any class to
the holders of its Preferred Stock or to make any other distribution to the
holders of Preferred Stock (other than a regular quarterly dividend out of
earnings on retained earnings of the Company), or (ii) to offer to the holders
of Preferred Stock rights, options, or warrants to subscribe for or to purchase





                                       54
<PAGE>   59
any additional Preferred Stock or shares of stock of any class or any other
securities, rights or options, or (iii) to effect any reclassification of its
Preferred Stock (other than a reclassification involving only the subdivision
of outstanding shares of Preferred Stock), or (iv) to effect any merger,
consolidation or other combination into or with any Person, 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 more than 50% of
the assets, cash flow, or earning power of the Company and its Subsidiaries
(taken as a whole) to any other Person, or (v) to effect the liquidation,
dissolution or winding up of the Company, then, in each such case, the Company
shall give to each holder of a Right in accordance with Section 25 hereof, a
notice of such proposed action, which shall specify the record date for the
purposes of such stock dividend, distribution of rights or warrants, or the
date on which such reclassification, consolidation, combination, merger, sale,
transfer, liquidation, dissolution, or winding up is to take place and the date
of participation therein by the holders of Common Stock and/or Preferred Stock,
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 shares of Preferred
Stock 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 shares of Common
Stock and/or Preferred Stock whichever shall be the earlier.  The failure to
give notice required by this Section 24 or any defect therein shall not affect
the legality or validity of the action taken by the Company or the vote upon
any such action.

                 (b)      In case any of the events set forth in Section
11(a)(ii) or Section 13(a) of this Agreement shall occur, then, in any such
case, (i) the Company shall as soon as practicable thereafter give to each
holder of a Right, to the extent feasible and in accordance with Section 25, a
notice of the occurrence of such event, which shall specify the event and the
consequences of the event to holders of





                                       55
<PAGE>   60
Rights under Section 11(a)(ii) or Section 13(a) hereof, and (ii) all references
in the preceding paragraph to Preferred Stock shall be deemed thereafter to
refer also to Common Stock or, if appropriate, other securities issuable in
respect of the Rights.

                 Section 25.  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 Company 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:

                          MAPCO Inc.
                          1800 South Baltimore Avenue
                          Tulsa, Oklahoma 74119
                          Attention:  Corporate Secretary

Subject to the provisions of Section 21, any notice or demand authorized by
this Agreement to be given or made by the Company 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 Company) as follows:

                          Harris Trust Company of New York
                          c/o Harris Trust and Savings Bank
                          311 West Monroe Street, 14th Floor
                          Chicago, Illinois 60606

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate (or, if
prior to the Distribution Date, to each holder of a certificate representing
shares of Common Stock) 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 Company.





                                       56
<PAGE>   61

                 Section 26.  Supplements and Amendments.  Prior to the Stock
Acquisition Time  and subject to the penultimate sentence of this Section 26,
the Company may, by resolution of its Board of Directors, and the Rights Agent
shall, if the Company so directs, supplement or amend any provision of this
Agreement in any respect whatsoever (including, without limitation, any
extension of the period in which the Rights may be redeemed) without the
approval of any holders of certificates representing shares of Common Stock of
the Company.  From and after the Stock Acquisition Time and subject to the
penultimate sentence of this Section 26, without approval of any holders of
certificates representing shares of Common Stock of the Company or of Right
Certificates, the Company may, by resolution of its Board of Directors, and the
Rights Agent shall, if the Company so directs, supplement or amend this
Agreement 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, or (iv)
to change or supplement or make any other provisions hereunder in any manner
which the Company may deem necessary or desirable, which shall not adversely
affect the interests of, or diminish substantially or eliminate the benefits
intended to be afforded by the Rights to, the holders of Right Certificates
(other than an Acquiring Person or an Affiliate or Associate of any such
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 or to modify the ability or
inability of the Board of Directors of the Company to redeem the Rights, in
either case 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 or the benefits to the holders of Rights
(other than an Acquiring Person or an Affiliate or Associate of any such
Person).  Upon the delivery of a certificate from an appropriate officer of the
Company which states that the proposed supplement or amendment is in compliance
with the terms of this Section 26, the Rights Agent shall execute such
supplement or amendment.  Notwithstanding anything contained





                                       57
<PAGE>   62
in this Agreement to the contrary, no supplement or amendment shall be made
which changes the Redemption Price, the Final Expiration Date, the Purchase
Price or the number of one two-hundredths of a share of Preferred Stock for
which a Right is exercisable.  Prior to the Stock Acquisition Time, the
interests of the holders of Rights shall be deemed coincident with the
interests of the holders of Common Stock.

                 Section 27.  Successors.  All the covenants and provisions of
this Agreement by or for the benefit of the Company or the Rights Agent shall
bind and inure to the benefit of their respective successors and assigns
hereunder.

                 Section 28.  Determinations and Actions by the Board of
Directors, etc.  For all purposes of this Agreement, any calculation of the
number of shares of Common Stock outstanding at any particular time, including
for purposes of determining the particular percentage of such outstanding
shares of Common Stock of which any Person is the Beneficial Owner, shall be
made in accordance with the last sentence of Rule 13d-3(d)(1)(i) of the General
Rules and Regulations under the Exchange Act.  The Board of Directors of the
Company shall have the exclusive power, authority and discretion to administer
this Agreement and to exercise all rights and powers specifically granted to
such Board of Directors, or as may be necessary or advisable in the
administration of this Agreement, including, but not limited to, 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 a determination to redeem or not redeem the Rights, to
amend the Agreement or to find or to announce publicly that any Person has
become an Acquiring Person).  All such actions, calculations, interpretations
and determinations (including, for purposes of clauses (x) and (z) below, all
omissions with respect to the foregoing) which are done or made by the Board of
Directors of the Company or the Company (x) shall in good faith be within the
discretion of the Board of Directors, (y) shall be final, conclusive and
binding on the





                                       58
<PAGE>   63
Company, the Rights Agent, the holders of the Rights and all other parties, and
(z) shall not subject the Board of Directors of the Company to any liability to
the holders of the Rights or Right Certificate.

                 Section 29.  Benefits of this Agreement.  Nothing in this
Agreement shall be construed to give to any Person other than the Company, the
Rights Agent and the registered holders of the Right Certificates (and, prior
to the Distribution Date, registered holders of the Common Stock) any legal or
equitable right, remedy or claim under this Agreement; but this Agreement shall
be for the sole and exclusive benefit of the Company, the Rights Agent and the
registered holders of the Right Certificates (and, prior to the Distribution
Date, registered holders of the Common Stock).

                 Section 30.  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;
provided, however, that notwithstanding anything in this Agreement to the
contrary, if any such term, provision, covenant or restriction is held by such
court or authority to be invalid, void or unenforceable and the Board of
Directors of the Company determines in its good faith judgment that severing
the invalid language from this Agreement would adversely affect the purpose or
effect of this Agreement, the right of redemption set forth in Section 23
hereof shall be reinstated and shall not expire until the Close of Business on
the tenth Business Day following the date of such determination by the Board of
Directors.  Without limiting the foregoing, if any provision of this Agreement
requiring that a determination be made by less than the entire Board (or at a
time or with the concurrence of a group of directors consisting of less than
the entire Board) is held by a court of competent jurisdiction or other
authority to be invalid, void or unenforceable, such determination shall then
be made by the Board in accordance with applicable law and the Company's
certificate of incorporation and by-laws.





                                       59
<PAGE>   64
                 Section 31.  Governing Law.  This Agreement 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, except that the rights and
obligations of the Rights Agent shall be governed by the laws of the State of
New York.

                 Section 32.  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, an all such counterparts shall together constitute
but one and the same instrument.

                 Section 33.  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.

                 IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed and their respective corporate seals to be
hereunto affixed and attested, all as of the day and year first above written.

Attest:                                    MAPCO INC.

By /s/ James N. Cundiff                    By /s/ James E. Barnes 
   ----------------------------------         ----------------------------------
    James N. Cundiff                          James E. Barnes 
    Assistant General                         Chairman of the Board,
    Counsel and Assistant                     President and Chief 
    Secretary                                 Executive Officer

Attest:                                    HARRIS TRUST COMPANY OF NEW YORK

By /s/ Bruce R. Hartney                    By /s/ Keith A. Bradley 
   ----------------------------------         ----------------------------------
   Name: Bruce R. Hartney                     Keith A. Bradley 
   Title:                                     Assistant Vice President 
                                              Shareholder Services
                                              Division





                                       60
<PAGE>   65
                                                                       Exhibit A




                                    FORM OF
               CERTIFICATE OF DESIGNATION, PREFERENCES AND RIGHTS
                OF SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                       of

                                   MAPCO INC.

             Pursuant to Section 151 of the General Corporation Law
                            of the State of Delaware

                 We, James E. Barnes, Chairman of the Board, President and
Chief Executive Officer, and James N.  Cundiff, Assistant General Counsel and
Assistant Secretary of MAPCO Inc. a corporation organized and existing under
the General Corporation Law of the State of Delaware (the "Corporation"), in
accordance with the provisions of Section 103 thereof, DO HEREBY CERTIFY:

                 That pursuant to the authority conferred upon the Board of
Directors by the Restated Certificate of Incorporation of the said Corporation,
the said Board of Directors on May 29, 1996, adopted the following resolution
creating a series of 175,000 shares of Preferred Stock designated as Series A
Junior Participating Preferred Stock:

                 RESOLVED, that pursuant to the authority vested in the Board
of Directors of this Corporation in accordance with the provisions of its
Restated Certificate of Incorporation, a series of Preferred Stock of the
Corporation be, and it hereby is, created, and that the designation and amount
thereof and the voting powers, preferences and relative, participating,
optional and other special rights of the shares of such series, and the
qualifications, limitations or restrictions thereof are as follows:

                 SECTION 1.  Designation and Amount.  The shares of such series
shall be designated as Series A Junior Participating Preferred Stock, without
par value (the "Junior Preferred Stock") and the number of shares constituting
such series shall be one hundred seventy-five thousand (175,000).





<PAGE>   66
Such number of shares may be increased or decreased by resolution of the Board
of Directors; provided, that no decrease shall reduce the number of shares of
Junior Preferred Stock to a number less than the number of shares reserved for
issuance upon the exercise of outstanding options, rights or warrants or upon
the conversion of any outstanding securities issued by the Corporation
convertible into Junior Preferred Stock.

                 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 or other class of capital stock of the Corporation ranking
prior and superior to the shares of Junior Preferred Stock with respect to
dividends, the holders of shares of Junior Preferred Stock shall be entitled to
receive, when, as and if declared by the Board of Directors out of funds
legally available for the purpose, quarterly dividends payable in cash in
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 Junior Preferred Stock, in an amount per share (rounded
to the nearest cent) equal to the greater of (a) $20.00 per share or (b)
subject to the provision for adjustment hereinafter set forth, 200 times the
aggregate per share amount of all cash dividends, and 200 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 or a
subdivision of the outstanding shares of Common Stock (by reclassification or
otherwise), declared on the Common Stock, par value $1.00 per share, of the
Corporation (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 Junior
Preferred Stock.  In the event the Corporation shall at any time after July 8,
1996 (the "Rights Declaration Date") (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of shares,
then in each such case the





                                       2
<PAGE>   67
amount to which holders of shares of Junior Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence
shall be adjusted by multiplying such amount by a fraction the numerator of
which is the number of shares of Common Stock outstanding immediately after
such event and the denominator of which is the number of shares of Common Stock
that were outstanding immediately prior to such event.

                 (b)  The Corporation shall declare a dividend or distribution
on the Junior 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 $20.00 per share on the Junior
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 Junior Preferred Stock from the Quarterly Dividend
Payment Date next preceding the date of issue of such shares of Junior
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, in which case
dividends on such shares shall begin to accrue from 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 Junior 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 accrue and be
cumulative from such Quarterly Dividend Payment Date.  Accrued but unpaid
dividends shall not bear interest.  Dividends paid on the shares of Junior
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





                                       3
<PAGE>   68
the time outstanding.  The Board of Directors may fix a record date for the
determination of holders of shares of Junior Preferred Stock entitled to
receive payment of a dividend or distribution declared thereon, which record
date shall be no more than 30 days prior to the date fixed for the payment
thereof.

                 SECTION 3.  Voting Rights.  The holder of shares of Junior
Preferred Stock shall have the following voting rights:

                 (a)  Subject to the provision for adjustment hereinafter set
forth, each share of Junior Preferred Stock shall entitle the holder thereof to
200 votes on all matters submitted to a vote of the stockholders of the
Corporation.  In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such
case the number of votes per share to which holders of shares of Junior
Preferred Stock were entitled immediately prior to such event shall be adjusted
by multiplying such number by a fraction the numerator of which is the number
of shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

                 (b)  Except as otherwise provided herein or by law, the
holders of shares of Junior 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 at any time dividends on any Junior Preferred
Stock shall be in arrears in an amount equal to six (6) quarterly dividends
thereon, the occurrence of such contingency shall mark the beginning of a
period (herein called a "default period") which shall extend until such time
when all accrued and unpaid dividends for all previous quarterly dividend
periods and for the current quarterly





                                       4
<PAGE>   69
dividend period on all shares of Junior Participating Stock then outstanding
shall have been declared and paid or set apart for payment.  During each
default period, all holders of Preferred Stock (including holders of the Junior
Preferred Stock) with dividends in arrears in an amount equal to six (6)
quarterly dividends thereon, voting as a classes, irrespective of series, shall
have the right to elect two (2) Directors.

                 (ii)  During any default period, such voting right of the
holders of Junior Preferred Stock may be exercised initially at a special
meeting called pursuant to subparagraph (iii) of this Section 3(C) or at any
annual meeting of stockholders, and thereafter at annual meetings of
stockholders, provided that neither such voting right nor the right of the
holders of any other series of Preferred Stock, if any, to increase, in certain
cases, the authorized number of Directors shall be exercised unless the holders
of ten percent (10%) in number of shares of Preferred Stock outstanding shall
be present in person or by proxy.  The absence of a quorum of the holders of
Common Stock shall not affect the exercise by the holders of Preferred Stock of
such voting right.  At any meeting at which the holders of Preferred Stock
shall exercise such voting right initially during an existing default period,
they shall have the right, voting as a class, to elect Directors to fill such
vacancies, if any, in the Board of Directors as may then exist up to two (2)
Directors or, if such right is exercised at an annual meeting, to elect two (2)
Directors.  If the number which may be so elected at any special meeting does
not amount to the required number, the holders of the Preferred Stock shall
have the right to make such increase in the number of Directors as shall be
necessary to permit the election by them of the required number.  After the
holders of the Preferred Stock shall have exercised their right to elect
Directors in any default period and during the continuance of such period, the
number of Directors shall not be increased or decreased except by vote of the
holders of Preferred Stock as herein provided or pursuant to the rights of any
equity securities ranking senior to or pari passu with the Junior Preferred
Stock.





                                       5
<PAGE>   70

                 (iii)  Unless the holders of Preferred Stock shall, during an
existing default period, have previously exercised their right to elect
Directors, the Board of Directors may order, or any stockholder or stockholders
owning in the aggregate not less than ten percent (10%) of the total number of
shares of Preferred Stock outstanding, irrespective of series, may request, the
calling of special meeting of the holders of Preferred Stock, which meeting
shall thereupon be called by the President, a Senior Vice President or Vice
President, or the Secretary of the Corporation.  Notice of such meeting and of
any annual meeting at which holders of Preferred Stock are entitled to vote
pursuant to this paragraph (C)(iii) shall be given to each holder of record of
Preferred Stock by mailing a copy of such notice to him at his last address as
the same appears on the books of the Corporation.  Such meeting shall be called
for a time not earlier than 20 days and not later than 60 days after such order
or request or in default of the calling of such meeting within 60 days after
such order or request, such meeting may be called on similar notice by any
stockholder or stockholders owning in the aggregate not less than ten percent
(10%) of the total number of shares of Preferred Stock outstanding.
Notwithstanding the provisions of this paragraph (C)(iii), no such special
meeting shall be called during the period within 60 days immediately preceding
the date fixed for the next annual meeting of the stockholders.

                 (iv)  In any default period, the holders of Common Stock, and
other classes of stock of the Corporation if applicable, shall continue to be
entitled to elect the whole number of Directors until the holders of Preferred
Stock shall have exercised their right to elect two (2) Directors voting as a
class, after the exercise of which right (x) the Directors so elected by the
holders of Preferred Stock shall continue in office until their successors
shall have been elected by such holders or until the expiration of the default
period, and (y) any vacancy in the Board of Directors may (except as provided
in paragraph (C)(ii) of this Section 3) be filled by vote of a majority of the
remaining Directors theretofore elected by the holders of the class of stock
which elected the Director whose office shall have





                                       6
<PAGE>   71
become vacant.  References in this paragraph (C) to Directors elected by the
holders of a particular class of stock shall include Directors elected by such
Directors to fill vacancies as provided in clause (y) of the foregoing
sentence.

                 (v)  Immediately upon the expiration of a default period, (x)
the right of the holders of Preferred Stock as a class to elect Directors shall
cease, (y) the terms of any Directors elected by the holders of Preferred Stock
as a class shall terminate, and (z) the number of Directors shall be such
number as may be provided for in the certificate of incorporation or by-laws
irrespective of any increase made pursuant to the provisions of paragraph
(C)(ii) of this Section 3 (such number being subject, however, to change
thereafter in any manner provided by law or in the certificate of incorporation
or by-laws).  Any vacancies in the Board of Directors effected by the
provisions of clauses (y) and (z) in the preceding sentence may be filled by a
majority of the remaining Directors.

                 (d)  Except as set forth herein, holders of Junior Preferred
Stock shall have no special voting rights and their consent shall not be
required (except to the extent they are entitled to vote with holders of Common
Stock as set forth herein) for taking any corporate action.

                 SECTION 4.  Certain Restrictions.  (a)  Whenever quarterly
dividends or other dividends or distributions payable on the Junior 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
Junior Preferred Stock outstanding shall have been paid in full, the
Corporation shall not

                 (i)  declare or pay dividends on, make any other distributions
         on, or redeem or purchase or otherwise acquire for consideration any
         shares of stock ranking junior (either as to dividends or upon
         liquidation, dissolution or winding up) to the Junior Preferred Stock;





                                       7
<PAGE>   72

             (ii)  declare or pay dividends on 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 Junior Preferred
         Stock, except dividends paid ratably on the Junior 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
         shares of any stock ranking on a parity (either as to dividends or
         upon liquidation, dissolution or winding up) with the Junior Preferred
         Stock, provided that the Corporation may at any time redeem, purchase
         or otherwise acquire shares of any such parity 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
         Junior Preferred Stock;

             (iv)  purchase or otherwise acquire for consideration any shares
         of Junior Preferred Stock, or any shares of stock ranking on a parity
         with the Junior 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.





                                       8
<PAGE>   73

                 SECTION 5.  Reacquired Shares.  Any shares of Junior 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 to be created by resolution or resolutions of the Board of
Directors, subject to the conditions and restrictions on issuance set forth
herein.

                 SECTION 6.  Liquidation, Dissolution or Winding Up.  (a)  Upon
any liquidation (voluntary or otherwise), dissolution or winding up of the
Corporation, 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 Junior Preferred Stock unless, prior thereto, the holders of
shares of Junior Preferred Stock shall have received $200 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 A Liquidation
Preference").  Following the payment of the full amount of the Series A
Liquidation Preference, no additional distributions shall be made to the
holders of shares of Junior Preferred Stock unless, prior thereto, the holders
of shares of Common Stock shall have received an amount per share (the "Common
Adjustment") equal to the quotient obtained by dividing (i) the Series A
Liquidation Preference by (ii) 200 (as appropriately adjusted as set forth in
subparagraph C below to reflect such events as stock splits, stock dividends
and recapitalizations with respect to the Common Stock) (such number in clause
(ii), the "Adjustment Number").  Following the payment of the full amount of
the Series A Liquidation Preference and the Common Adjustment in respect of all
outstanding shares of Junior Preferred Stock and Common Stock, respectively,
holders of Junior Preferred Stock and holders of shares 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.





                                       9
<PAGE>   74

                 (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 Junior Preferred Stock, then
such remaining assets shall be distributed ratably to 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 Common Adjustment, then such remaining assets shall be
distributed ratably to the holders of Common Stock.

                 (c)  In the event the Corporation shall at any time after the
Rights Declaration Date (i) declare any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case the Adjustment Number in effect immediately prior to such event
shall be adjusted by multiplying such Adjustment Number by a fraction the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

                 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 Junior 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 200 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.  In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such
case the





                                       10
<PAGE>   75
amount set forth in the preceding sentence with respect to the exchange or
change of shares of Junior Preferred Stock shall be adjusted by multiplying
such amount by a fraction the numerator of which is the number of shares of
Common Stock outstanding immediately after such event and the denominator of
which is the number of shares of Common Stock that were outstanding immediately
prior to such event.

                 SECTION 8.  No Redemption.  The shares of Junior Preferred
Stock shall not be redeemable.

                 SECTION 9.  Ranking.  The Junior 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 Restated 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 Junior 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 Junior Preferred Stock, voting as a class.

                 SECTION 11.  Fractional Shares.  Junior Preferred Stock may be
issued in fractions of a share which shall entitle the holder, in proportion to
such holder's fractional shares, to exercise voting rights, receive dividends,
participate in distributions and to have the benefit of all other rights of
holders of Junior Preferred Stock.





                                       11
<PAGE>   76
                 IN WITNESS WHEREOF, we have executed and subscribed this
Certificate and do affirm the foregoing as true under the penalties of perjury
this 29th day of May, 1996.



Attest:                                    MAPCO Inc.


_________________________                  ___________________________
James N. Cundiff                           James E. Barnes
Assistant General Counsel                  Chairman, President
and Assistant Secretary                    and Chief Executive Officer





Attest:                                    HARRIS TRUST COMPANY
                                                   OF NEW YORK


____________________                       ____________________
Name:                                      Keith A. Bradley
Title:                                     Assistant Vice President
                                           Shareholder Services Division





                                       12
<PAGE>   77
                                                                       Exhibit B






                           Form of Right Certificate


Certificate No. R-                                               ________ Rights

         NOT EXERCISABLE AFTER July 7, 2006 OR EARLIER IF THE BOARD OF
         DIRECTORS ORDERS THE REDEMPTION OR EXCHANGE OF THE RIGHTS. THE RIGHTS
         ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT AND TO EXCHANGE ON THE
         TERMS SET FORTH IN THE RIGHTS AGREEMENT.  UNDER CERTAIN CIRCUMSTANCES,
         RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING PERSON OR AN AFFILIATE OR
         ASSOCIATE THEREOF (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT)
         AND ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID. THE
         RIGHTS SHALL NOT BE EXERCISABLE, AND SHALL BE VOID SO LONG AS HELD, BY
         A HOLDER IN ANY JURISDICTION WHERE THE REQUISITE QUALIFICATION TO THE
         ISSUANCE OF SUCH HOLDER, OR THE EXERCISE BY SUCH HOLDER, OF THE RIGHTS
         IN SUCH JURISDICTION SHALL NOT HAVE BEEN OBTAINED OR BE OBTAINABLE.
         [THE RIGHTS REPRESENTED BY THIS RIGHTS 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 RIGHTS
         CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY BECOME NULL AND VOID
         IN THE CIRCUMSTANCES SPECIFIED IN SECTION 7(e) OF SUCH AGREEMENT*]





__________________________________

*     The portion of the legend in brackets shall be inserted only if
      applicable and shall replace the preceding sentence.

<PAGE>   78





                               Right Certificate

                                   MAPCO 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 May 29, 1996, (the "Rights
Agreement"), between MAPCO Inc., a Delaware corporation (the "Company"), and
HARRIS TRUST COMPANY OF NEW YORK, a New York trust company (the "Rights
Agent"), to purchase from the Company at any time after the Distribution Date
(as such term is defined in the Rights Agreement) and prior to 5:00 PM (New
York City time) on July 7, 2006 at the office or offices of the Rights Agent
designated for such purpose, or its successors as Rights Agent, one
two-hundredth of a fully paid, non-assessable share of Series A Junior
Participating Preferred Stock (the "Preferred Stock") of the Company, at a
purchase price of $200 per one two-hundredth of a share (the "Purchase Price"),
upon presentation and surrender of this Right Certificate with the Form of
Election to Purchase and the Certificate contained therein duly executed.  The
number





                                       2
<PAGE>   79
of Rights evidenced by this Right Certificate (and the number of one
two-hundredths of a share of Preferred Stock which may be purchased upon
exercise thereof) set forth above, and the Purchase Price per one two-hundredth
of a share of Preferred Stock set forth above, are the number and Purchase
Price as of July 8, 1996, based on the Preferred Stock as constituted at
such date.
                 Upon the occurrence of a Section 11(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, or (iii) under certain circumstances specified in the Rights
Agreement, a transferee of a person who, after or concurrently with such
transfer, became an Acquiring Person, or any Affiliate or Associate of an
Acquiring Person, 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.





                                       3
<PAGE>   80
                 The Rights evidenced by this Right Certificate shall not be
exercisable, and shall be void so long as held, by a holder in any jurisdiction
where the requisite qualification to the issuance to such holder, or the
exercise by such holder, of the Rights in such jurisdiction shall not have been
obtained or be obtainable.

                 As provided in the Rights Agreement, the Purchase Price and
the number and kind of shares of Preferred Stock 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 defined in the Rights
Agreement).

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





                                       4
<PAGE>   81
                 This Right Certificate is subject to all of the terms,
provisions and conditions of the Rights Agreement, as it may be amended from
time to time,  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
Company 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 above-mentioned office of the Rights Agent and are
also available upon written request to the Rights Agent.

                 This Right Certificate, with or without other Right
Certificates, upon surrender at the principal office or offices of the Rights
Agent designated for such purpose, 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





                                       5
<PAGE>   82
one two-hundredths of a share of Preferred Stock 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 Company at its option at a
redemption price of $.01 per Right at any time prior to the earlier of the
Close of Business on (i) the Stock Acquisition Date (as defined in the Rights
Agreement), and (ii) the close of business on The Final Expiration Date (as
defined in the Rights Agreement).  Subject to the provisions of the Rights
Agreement, the rights evidenced by this Right Certificate may be exchanged in
whole or in part for shares of Common Stock or fractional shares of Preferred
Stock (or any other substantially similar series of preferred stock of the
Company).

                 Other than those provisions relating to the principal economic
terms of the Rights, any of the





                                       6
<PAGE>   83
provisions of the Rights Agreement may be amended by the Board of Directors of
the Company in any respect whatsoever up until the Stock Acquisition Date (as
defined in the Rights Agreement) and thereafter in certain respects which do
not adversely affect the interests of holders of Right Certificates (other than
an Acquiring Person or the Affiliates or Associates thereof).

                 No holder of this Right Certificate shall be entitled to vote
or receive dividends or be deemed for any purpose the holder of shares of
Preferred Stock or of any other securities of the Company 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 Company 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 subscription
rights, or otherwise, until the Right or





                                       7
<PAGE>   84
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
Company and its corporate seal.

Dated as of _________ __, 19__


ATTEST:                                    MAPCO INC.

______________________                     By____________________________
      Secretary                              Title:


Countersigned:

HARRIS TRUST COMPANY OF NEW YORK


By______________________





                                       8
<PAGE>   85

                   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 Company,
with full power of substitution.

Dated:  ________________, 19__



                                                  ______________________________
                                                  Signature
     

Signature Guaranteed:





                                       9
<PAGE>   86


                                  Certificate

                 The undersigned hereby certifies by checking the appropriate
boxes that:
                 (1)  this Right Certificate [ ] is [ ] is not being sold,
assigned and transferred by or on behalf of a Person who is or was an Acquiring
Person or an Affiliate or Associate of any such Acquiring Person (as such terms
are defined pursuant to the Rights Agreement);

                 (2)  after due inquiry and to the best knowledge of the
undersigned, it [ ] did [ ] did not acquire the Rights evidenced by this Right
Certificate from any Person who is, was or subsequently became an Acquiring
Person or an Affiliate or Associate of an Acquiring Person.
                                                  
Dated:  ____________, 19__                        ______________________________
                                                  Signature
Signature Guaranteed:

                                     NOTICE

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





                                       10
<PAGE>   87





                          FORM OF ELECTION TO PURCHASE

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


To:  MAPCO Inc.

                 The undersigned hereby irrevocably elects to exercise ________
Rights represented by this Right Certificate to purchase the shares of
Preferred Stock issuable upon the exercise of the Rights (or such other
securities of the Company or of any other person which may be issuable upon the
exercise of the Rights) and requests that certificates for such shares be
issued in the name of and delivered to:

Please insert social security
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 of such
Rights shall be registered in the name of and delivered to:





<PAGE>   88

Please insert social security
or other identifying number

________________________________________________________________________________
                        (Please print name and address)
________________________________________________________________________________

________________________________________________________________________________

Dated:  _____________, 19__



                                                  ______________________________
                                                  Signature


Signature Guaranteed:


                                  Certificate

                 The undersigned hereby certifies by checking the appropriate
boxes that:
                 (1)  the Rights evidenced by this Right Certificate [ ] are
[ ] are not being exercised by or on behalf of a Person who is or was an
Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as
such terms are defined pursuant to the Rights Agreement);

                 (2)  after due inquiry and to the best knowledge of the
undersigned, it [ ] did [ ] did not acquire the Rights





                                       2
<PAGE>   89
evidenced by this Right Certificate from any Person who is, was or became an
Acquiring Person or an Affiliate or Associate of an Acquiring Person.
                                                  
Dated:  ____________, 19__                        ______________________________
                                                  Signature

Signature Guaranteed:


                                     NOTICE

                 The signature to the foregoing Election to Purchase and
Certificate must correspond to the name as written upon the fact of this Right
Certificate in every particular, without alteration or enlargement or any
change whatsoever.





                                       3
<PAGE>   90
                                                                       Exhibit C





                         SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED STOCK


                 On May 29, 1996, the Board of Directors of MAPCO Inc. (the
"Company") declared a dividend distribution of one Preferred Stock Purchase
Right (a "Right") for each outstanding share of MAPCO Inc. Common Stock (the
"Common Stock"), par value $1.00 per share, to stockholders of record at the
Close of Business on July 8, 1996 (the "Record Date").  The following is a
summary of the terms of the Rights.

                 Each Right entitles the registered holder to purchase from the
Company a unit consisting of one two- hundredth of a share of Series A Junior
Participating Preferred Stock, without par value (the "Preferred Stock") at a
price of $200 per one two-hundredth of a share of Preferred Stock, subject to
adjustment (the "Purchase Price").  The description and terms of the Rights are
set forth in a Rights Agreement dated as of May 29, 1996 (the "Rights
Agreement") between the Company and Harris Trust Company of New York, as Rights
Agent.

                 Stockholders are not required nor permitted to take any action
on or after the Record Date with respect to the Rights until such time as the
Distribution Date has occurred.  The Rights are not exercisable until the
Distribution Date.

                 Initially, the Rights will be attached to all Common Stock
certificates representing shares then outstanding, and no separate Right
Certificate will be distributed.  The Rights will separate from the Common
Stock and a "Distribution Date" will occur upon the earlier of (i) ten business
days following a public announcement that a person or group of affiliated or
associated persons (an "Acquiring Person") has acquired, or obtained the right
to acquire, beneficial ownership of 15% or more of the outstanding shares of
Common Stock (the "Stock Acquisition





<PAGE>   91
Date"), or (ii) ten business days (or, if determined by the Board of Directors,
a specified or unspecified later date) following the commencement or
announcement of a tender offer or exchange offer that would result in a person
or group beneficially owning 15% or more of such outstanding shares of Common
Stock.

                 Until the Distribution Date, (i) the Rights will be evidenced
by the Common Stock certificates and will be transferred with and only with
such Common Stock certificates, (ii) new Common Stock certificates issued after
July 8, 1996 will contain a notation incorporating the Rights Agreement by
reference and (iii) the surrender for transfer of any certificates from Common
Stock outstanding will also constitute the transfer of the Rights associated
with the Common Stock represented by such certificate.  As soon as practicable
after the Distribution Date, Right Certificates will be mailed to holders of
record of the Common Stock as of the Close of Business on the Distribution Date
and, thereafter, the separate Right Certificate alone will represent the
Rights.  Except as otherwise determined by the Board of Directors, only shares
of Common Stock issued prior to the Distribution Date will be issued with
Rights.

                 The Rights are not exercisable until the Distribution Date and
will expire at the Close of Business on July 7, 2006, unless earlier redeemed
by the Company as described below.

                 In the event that a person or group becomes an Acquiring
Person (except pursuant to a tender offer for all outstanding Common Stock
determined to be at a fair price and otherwise in the best interests of the
Company and its stockholders by at least a majority of the members of the Board
of Directors who are not officers of the Company or an Acquiring Person) proper
provision shall be made so that each holder of a Right (other than the
Acquiring Person) will thereafter have the right to receive upon exercise that
number of shares of Common Stock (or, in certain circumstances, cash, a
reduction in the Purchase Price, Common Stock, other equity securities of the
Company, debt





                                       2
<PAGE>   92
securities of the Company, other assets or a combination thereof) having a
market value (as defined in the Rights Agreement) of two times the Purchase
Price of the Right.

                 For example, at an exercise price of $200 per Right, each
Right not owned by an Acquiring Person (or by certain related parties)
following an event set forth in the preceding paragraph would entitle its
holder to purchase $400 worth of Common Stock (or other consideration, as noted
above) for $200.  Assuming that the Common Stock had a per share value of $50
at such time, the holder of each valid Right would be entitled to purchase
eight shares of Common Stock for $200.

                 In the event that, at any time following the Stock Acquisition
Date, the Company is acquired in a merger or other business combination
transaction (except certain transactions with a person who becomes an Acquiring
Person as a result of a tender offer described in the second preceding
paragraph) or 50% or more of its assets, cash flow or earning power is sold,
proper provision shall be made so that each holder of a Right will thereafter
have the right to receive, upon exercise thereof at the then current exercise
price of the Right, that number of shares of common stock of the acquiring
company which at the time of such transaction would have a market value (as
defined in the Rights Agreement) of two times the Purchase Price of the Right.
In the event that, after the Stock Acquisition Date, the Company were the
surviving Corporation in a merger and its Common Stock were changed or
exchanged, proper provision shall be made so that each holder of a Right will
thereafter have the right to receive upon exercise that number of shares of
common stock of the Company having a market value of two times the exercise
price of the Right. The events set forth in this paragraph and in the preceding
paragraph are referred to as the "Triggering Events."

                 Notwithstanding any of the foregoing, following the occurrence
of any of the events set forth in the preceding paragraphs, all Rights that
are, or (under certain circumstances specified in the Rights Agreement) were,
beneficially owned by any Acquiring Person will be null and





                                       3
<PAGE>   93
void.  A person will not become an Acquiring Person if the Board of Directors
of the Company determines that such person or group became an Acquiring Person
inadvertently and such person or group promptly divests itself of sufficient
number of shares of Common Stock so that such person or group is no longer an
Acquiring Person.

                 The Purchase Price payable, and the number of Shares of
Preferred Stock or other securities or property 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 Stock, (ii) upon the grant to holders of the
Preferred Stock of certain rights or warrants to subscribe for Preferred Stock
or convertible securities at less than the current market price of the
Preferred Stock, or (iii) upon the distribution to holders of the Preferred
Stock of evidences of indebtedness or assets (excluding regular quarterly cash
dividends) or of subscription rights or warrants (other than those referred to
above).

                 With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments amount to at least 1% of the
Purchase Price.  No fractional Shares will be issued (other than fractions
which are integral multiples of one two-hundredth of a share of Preferred Stock
which may, upon the election of the Company, be evidenced by depository
receipts) and, in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Stock on the last trading date prior to the date
of exercise.

                 At any time prior to the earlier of the Stock Acquisition Date
and the Final Expiration Date (as defined in the rights Agreement), the Board
of Directors of the Company may redeem the Rights in whole, but not in part, at
a price of $.01 per Right.  Immediately upon the action of the Board of
Directors ordering redemption of the Rights, the Rights will terminate and the
only right of the holders of Rights will be to receive the $.01 redemption
price.





                                       4
<PAGE>   94

                 At any time after a person becomes an Acquiring Person and
prior to the acquisition by such Person of 50% or more of the outstanding
shares of Common Stock, the Board of Directors of the Company may exchange the
Rights (other than Rights beneficially owned by such Person which have become
void), in whole or part, at an exchange ratio of one share of Common Stock per
Right (subject to adjustment).  The Company, at its option, may substitute one
two- hundredth of a share of Preferred Stock (or other series of substantially
similar preferred stock of the Company) for each share of Common Stock to be
exchanged.

                 Until a Right is exercised, the holder thereof, as such, will
have no rights as a stockholder of the Company, including, without limitation,
the right to vote or to receive dividends.  While the distribution of the
Rights will not be taxable to stockholders or to the Company, stockholders may,
depending upon the circumstances, recognize taxable income in the event that
the Rights become exercisable for Common Stock (or other consideration) of the
Company or for common stock of the acquiring company as set forth above.

                 Other than those provisions relating to the principal economic
terms of the Rights, any of the provisions of the Rights Agreement may be
amended by the Board of Directors of the Company prior to the Stock Acquisition
Date. After the Stock Acquisition Date, the provisions of the Rights Agreement
may be amended by the Board in order to cure any ambiguity, to correct or
supplement defective or inconsistent provisions, to shorten or lengthen any
time period (other than time periods relating to when the Rights may be
redeemed) under the Rights Agreement or to make changes which do not adversely
affect the interests of, or diminish the benefits intended to be afforded to,
holders of Rights (excluding the interests of any Acquiring Person); provided,
however, that no amendment to adjust the time period governing redemption shall
be made at such time as the Rights are not redeemable.

                 A copy of the Rights Agreement has been filed with the
Securities and Exchange Commission as an Exhibit to a





                                       5
<PAGE>   95
Registration Statement on Form 8-A dated June ___, 1996.  A copy of the Rights
Agreement is available free of charge from the Rights Agent.  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 incorporated herein
by reference.





                                       6


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