SANTA FE ENERGY RESOURCES INC
8-A12B, 1997-02-28
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1
                                 UNITED STATES
                       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



                        SANTA FE ENERGY RESOURCES, INC.
             (Exact name of registrant as specified in its charter)




                DELAWARE                                 36-2722169
(State of incorporation or organization)    (I.R.S. Employer Identification No.)



         1616 SOUTH VOSS ROAD
         SUITE NO. 1000
         HOUSTON, TEXAS                                   77057
(Address of principal executive offices)                (Zip Code)





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:

Rights to purchase Series A
Junior Participating Preferred Stock             New York Stock Exchange, Inc.

SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:

                                      None
                           --------------------------
                                (Title of Class)


<PAGE>   2



ITEM 1.        DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED

                         SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES

               On February 19, 1997, the Board of Directors of Santa Fe Energy
Resources, Inc. (the "Company") declared a dividend of one preferred share
purchase right (a "Right") for each outstanding share of common stock, par
value $0.01 per share, of the Company (the "Common Stock"). The dividend is
payable on March 3, 1997 (the "Record Date") to the stockholders of record on
that date. Each Right entitles the registered holder to purchase from the
Company one one-hundredth of a share of Series A Junior Participating Preferred
Stock, par value $1.00 per share, of the Company (the "Preferred Stock") at a
price of $42.00 (subject to adjustment as provided in the Rights Agreement)
(the "Purchase Price"). The description and terms of the Rights are set forth
in a Rights Agreement (the "Rights Agreement") between the Company and
First Chicago Trust Company of New York, as Rights Agent (the "Rights Agent").

               Until the earlier to occur of (i) 10 business days following a
public announcement that a person or group of affiliated or associated persons
(an "Acquiring Person") have acquired beneficial ownership of 15% or more of
the outstanding Common Stock or (ii) 10 business days (or such later date as
may be determined by action of the Board of Directors of the Company prior to
such time as any person or group of affiliated persons becomes an Acquiring
Person) following the commencement of, or announcement of an intention to make,
a tender offer or exchange offer the consummation of which would result in the
beneficial ownership by a person or group of 15% or more of the outstanding
Common Stock (the earlier of such dates being the "Distribution Date"), the
Rights will be evidenced, with respect to any of the Common Stock certificates
outstanding as of the Record Date, by such Common Stock certificate with a copy
of this Summary of Rights attached thereto. The date of the first public
announcement that a person has become an Acquiring Person is referred to as the
"Stock Acquisition Date."

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

               The Rights are not exercisable until the Distribution Date. The
Rights will expire on the earlier of (i) the close of business on March 3, 2000
and (ii) the close of business on the second anniversary of the distribution to
the Company's common stockholders of the shares of common stock of Monterey
Resources, Inc. owned by the Company (the "Final Expiration Date"), unless the
Final Expiration Date is extended or unless the Rights are earlier redeemed or
exchanged by the Company, in each case, as described below.

               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



<PAGE>   3



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 shares of Preferred Stock of certain rights or
warrants to subscribe for or purchase Preferred Stock at a price, or securities
convertible into Preferred Stock with a conversion price, less than the
then-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 periodic cash dividends paid out of earnings or
retained earnings or dividends payable in Preferred Stock) or of subscription
rights or warrants (other than those referred to above).

               The number of outstanding Rights and the number of one
one-hundredths of a share of Preferred Stock issuable upon exercise of each
Right are also subject to adjustment in the event of a stock split of the
Common Stock or a stock dividend on the Common Stock payable in Common Stock or
subdivisions, consolidations or combinations of the Common Stock occurring, in
any such case, prior to the Distribution Date. If the Company shall pay any
dividend or distribution to the holders of its Common Stock consisting of
evidences of indebtedness or assets (excluding quarterly cash dividends), prior
to the Dissolution Date, then the Purchase Price is also subject to adjustment.

               Preferred Stock purchasable upon exercise of the Rights will be
nonredeemable. Each share of Preferred Stock will have a minimum preferential
quarterly dividend rate of $1.00 per share, but will be entitled to an
aggregate dividend of 100 times the dividend declared on the Common Stock. In
the event of liquidation, the holders of the Preferred Stock will receive a
preferential liquidation payment equal to the greater of $100 or 100 times the
payment made per share of Common Stock. Each share of Preferred Stock will have
100 votes, voting together with the Common Stock. Finally, in the event of any
merger, consolidation or other transaction in which Common Stock is exchanged,
each share of Preferred Stock will be entitled to receive 100 times the amount
received per share of Common Stock. These rights are protected by customary
antidilution provisions.

               Because of the nature of the Preferred Stock dividend,
liquidation and voting rights, the value of one one-hundredth interest in a
share of Preferred Stock purchasable upon exercise of each Right should
approximate the value of one share of Common Stock.

               In the event that the Company is acquired in a merger or other
business combination transaction or 50% or more of its consolidated assets or
earning power are sold after a person or group has become an Acquiring Person,
proper provision will be made so that each holder of a Right, other than Rights
beneficially owned by an Acquiring Person (which will be void), will upon
exercise have the right to receive, upon the 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 will have a
market value of two times the exercise price of the Right. In the event that
any person or group of affiliated or associated persons becomes an Acquiring
Person, proper provision shall be made so that each holder of a Right, other
than Rights beneficially owned by the Acquiring Person (which will thereafter
be void), will upon exercise have the right to receive upon exercise that
number of shares of Common Stock having a market value of two times the
exercise price of the Right.

               At any time after any person or group becomes an Acquiring
Person and prior to the acquisition by such person or group 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 owned by such person or group which
will have become void), in whole or in part, at an exchange ratio of one

                                     - 2 -

<PAGE>   4
share of Common Stock, or one one-hundredth of a share of Preferred Stock (or 
of a share of a class or series of the Company's preferred stock having 
equivalent rights, preferences and privileges), per Right (subject to 
adjustment).

               With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments require an adjustment of at least
1% in such Purchase Price. No fractional Preferred Stock will be issued (other
than fractions which are integral multiples of one one-hundredth of a Preferred
Stock, which may, at the election of the Company, be evidenced by depositary
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 day prior to the date
of exercise.

        At any time prior to the close of business on the 10th business day
after the Stock Acquisition Date, the Board of Directors of the Company may
redeem the Rights in whole, but not in part, at a price of $0.01 per Right (the
"Redemption Price"). The redemption of the Rights may be made effective at such
time on such basis with such conditions as the Board of Directors in its sole
discretion may establish. Immediately upon any redemption of the Rights, the
right to exercise the Rights will terminate and the only right of the holders
of Rights will be to receive the Redemption Price.

        For so long as the Rights are then redeemable the Company may in its
sole and absolute discretion amend the Rights Agreement without the consent of
the holders of the Rights, except that no amendment can be made to reduce the
Redemption Price. At such time as the Rights have become non-redeemable, the
terms of the Rights may be amended by the Board of Directors of the Company
without the consent of the holders of the Rights, except that (i) no amendment
can be made to reduce the Redemption Price, (ii) no amendment may adversely
affect the interests of the holders of the Rights and (iii) the redemption
right cannot be reinstated.

        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.

        The Rights Agreement specifying the terms of the Rights, the
Certificate of Designation, Preferences and Rights of the Preferred Stock
specifying the terms of the Preferred Stock and the form of Right Certificate
(Exhibit B to the Rights Agreement) are filed herewith as Exhibits. The
foregoing summary description of the Rights does not purport to be complete and
is qualified in its entirety by reference to such Exhibits, which are hereby
incorporated herein by reference.


ITEM 2.        EXHIBITS

1.      Rights Agreement dated as of March 3, 1997, between Santa Fe Energy 
        Resources, Inc. and First Chicago Trust Company of New York, as Rights
        Agent.

2.      Form of Amended Certificate of Designations of Series A Junior 
        Participating Preferred Stock of Santa Fe Energy Resources, Inc.
        (attached as Exhibit A to the Rights Agreement filed as Exhibit 1 
        hereto)

3.      Form of Right Certificate (attached as Exhibit B to the Rights Agreement
        filed as Exhibit 1 hereto).

                                     - 3 -

<PAGE>   5

                                   SIGNATURE

               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.

Dated:  February 28, 1997

                                       SANTA FE ENERGY RESOURCES, INC.



                                       By: /s/ David L. Hicks
                                          --------------------------------------
                                           David L. Hicks
                                           Vice President -- Law and General 
                                           Counsel




                                    - 4 -

<PAGE>   6


                               INDEX OF EXHIBITS


<TABLE>
<CAPTION>
                                                                                               
                                                                                               
EXHIBIT                                                                                        
NUMBER                                TITLE                                                    

<S>               <C>                                                                              <C>
1.                Rights Agreement dated as of March 3, 1997, between
                  Santa Fe Energy Resources, Inc. and First Chicago Trust
                  Company of New York, as Rights Agent.

2.                Form of Certificate of Designations, of Series A Junior 
                  Participating Preferred Stock of Santa Fe Energy Resources, Inc. 
                  (attached as Exhibit A to the Rights Agreement filed as 
                  Exhibit 1 hereto).

3.                Form of Right Certificate (attached as Exhibit B to the
                  Rights Agreement filed as Exhibit 1 hereto).
</TABLE>


                                     - 5 -


<PAGE>   1

                        SANTA FE ENERGY RESOURCES, INC.

                                      AND

            FIRST CHICAGO TRUST COMPANY OF NEW YORK, AS RIGHTS AGENT


                                RIGHTS AGREEMENT


                           DATED AS OF MARCH 3, 1997




<PAGE>   2



                               TABLE OF CONTENTS


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

Section 2.  Appointment of Rights Agent...........................................................................8

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...................................................15

Section 9.  Availability of Preferred Shares.....................................................................15

Section 10. Preferred Shares Record Date.........................................................................17

Section 11. Adjustment of Purchase Price, Number of Shares or Number of Rights...................................18

Section 12. Certificate of Adjusted Purchase Price or Number of Shares...........................................32

Section 13. Consolidation, Merger or Sale or Transfer of Assets or Earning Power.................................33

Section 14. Fractional Rights and Fractional Shares..............................................................39

Section 15. Rights of Action.....................................................................................41

Section 16. Agreement of Right Holders...........................................................................41

Section 17. Right Certificate Holder Not Deemed a Stockholder....................................................42

Section 18. Concerning the Rights Agent..........................................................................43

Section 19. Merger or Consolidation or Change of Name of Rights Agent............................................43

Section 20. Duties of Rights Agent...............................................................................45
</TABLE>


                                      -i-

<PAGE>   3



<TABLE>
<S>                                                                                                              <C>
Section 21.  Change of Rights Agent..............................................................................48

Section 22.  Issuance of New Right Certificates..................................................................49

Section 23.  Redemption..........................................................................................50

Section 24.  Exchange............................................................................................51

Section 25.  Notice of Certain Events............................................................................54

Section 26.  Notices.............................................................................................55

Section 27.  Supplements and Amendments..........................................................................56

Section 28.  Successors..........................................................................................57

Section 29.  Benefits of this Agreement..........................................................................57

Section 30.  Determination and Actions by the Board of Directors.................................................57

Section 31.  Severability........................................................................................58

Section 32.  Governing Law.......................................................................................58

Section 33.  Counterparts........................................................................................58

Section 34.  Descriptive Headings................................................................................58
</TABLE>


                                      -ii-

<PAGE>   4

                                RIGHTS AGREEMENT

         This Agreement, dated as of March 3, 1997 ("Agreement"), between Santa
Fe Energy Resources, Inc., a Delaware, corporation (the "Company"), and First
Chicago Trust Company of New York, a New York corporation, as rights agent (the
"Rights Agent").

                                R E C I T A L S:

         WHEREAS, the Board of Directors of the Company has authorized and
declared a dividend of one preferred share purchase right (a "Right") for each
share of Common Stock (as such term is hereinafter defined) of the Company
outstanding on March 3, 1997 (the "Record Date"), each Right representing the
right to purchase one one-hundredth of a Preferred Share, upon the terms and
subject to the conditions herein set forth, and has further authorized and
directed the issuance of one Right with respect to each share of Common Stock
that shall become outstanding between the Record Date and the earliest of the
Distribution Date, the Redemption Date and the Final Expiration Date (as such
terms are hereinafter defined);

         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 (as such 
         term is hereinafter defined) who or which shall be the Beneficial
         Owner (as such term is hereinafter defined) of 15% or more of the
         shares of Common Stock then outstanding, but shall not include an
         Exempt Person; provided, however, that if the Board of Directors of
         the Company determines in good faith that a Person who would otherwise
         be an "Acquiring Person" has




<PAGE>   5



         become such inadvertently (including, without limitation, because (i)
         such Person was unaware that it beneficially owned a percentage of
         Common Stock that would otherwise cause such Person to be an
         "Acquiring Person" or (ii) such Person was aware of the extent of its
         Beneficial Ownership of Common Stock 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 such Person, as promptly as practicable after being
         advised of such determination divested or divests himself or itself of
         Beneficial Ownership of a sufficient number of shares of Common Stock
         so that such Person would no longer be an Acquiring Person, then such
         Person shall not be deemed to be or to have become an "Acquiring
         Person" for any purposes of this Agreement. Notwithstanding the
         foregoing, no Person shall become an "Acquiring Person" as the result
         of an acquisition of Common Shares by the Company which, by reducing
         the number of shares outstanding, increases the proportionate number
         of shares beneficially owned by such Person to 15% or more of the
         Common Shares of the Company then outstanding; provided, however, that
         if a Person shall become the Beneficial Owner of 15% or more of the
         Common Shares of the Company then outstanding by reason of the share
         purchases by the Company and shall, after such share purchases by the
         Company, become the Beneficial Owner of any additional Common Shares
         of the Company, then such Person shall be deemed to be an "Acquiring
         Person" unless upon the consummation of the acquisition of such
         additional shares of Common Stock such Person does not own 15% or more
         of the shares of Common Stock then outstanding.


                                      -2-

<PAGE>   6



                  (b)      "Affiliate" shall have the meaning ascribed to such 
         term in Rule 12b-2 of the General Rules and Regulations under the
         Exchange Act as in effect on the date of this Agreement.

                  (c)      "Associate" shall have the meaning ascribed to such 
         term in Rule l2b-2 of the General Rules and Regulations under the
         Exchange Act as in effect on the date of this Agreement.

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

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

                           (ii)     which such Person or any of such Person's
                  Affiliates or Associates has (A) the right to acquire
                  (whether such right is exercisable immediately or only after
                  the passage of time) pursuant to any agreement, arrangement
                  or understanding (other than customary agreements with and
                  between underwriters and selling group members with respect
                  to a bona fide public offering of securities), 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, (I) securities
                  tendered pursuant to a tender or exchange offer made by or on
                  behalf of such Person or any of such Person's Affiliates or
                  Associates until such tendered securities are accepted for
                  purchase or exchange or (II) securities which such Person has
                  a right to acquire upon the exercise of Rights at any time
                  prior to the time a Person becomes an


                                      -3-

<PAGE>   7



                  Acquiring Person; or (B) the right to vote pursuant to any
                  agreement, arrangement or understanding; provided, however,
                  that a Person shall not be deemed the Beneficial Owner of, or
                  to beneficially own, any security by reason of such an
                  agreement, arrangement or understanding if the agreement,
                  arrangement or understanding to vote such security (1) arises
                  solely from a revocable proxy or consent given to such Person
                  in response to a public proxy or consent solicitation made
                  pursuant to, and in accordance with, the applicable rules and
                  regulations promulgated under the Exchange Act (as such term
                  is hereinafter defined) and (2) is not also then reportable
                  on Schedule 13D under the Exchange Act (or any compa rable or
                  successor report); or

                           (iii)    which are beneficially owned, directly or
                  indirectly, by any other Person with which such Person or any
                  of such Person's Affiliates or Associates has any agreement,
                  arrangement or understanding (other than customary agreements
                  with and between underwriters and selling group members with
                  respect to a bona fide public offering of securities) for the
                  purpose of acquiring, holding, voting (except to the extent
                  contemplated by the proviso to Section 1(c)(ii)(B)) or
                  disposing of any securities of the Company. 

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


                                      -4-

<PAGE>   8
         



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

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

                  (g)      "Common Stock" when used with reference to the 
         Company shall mean the shares of common stock, par value $0.01 per
         share, of the Company. "Common Stock" when used with reference to any
         Person other then the Company shall mean the capital stock (or, in the
         case of an unincorporated entity, the equivalent equity interest) with
         the greatest voting power of such other Person or, if such other
         Person is a Subsidiary of another Person, the Person or Persons which
         ultimately control such first-mentioned Person.

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

                  (i)      "Company" shall have the meaning set forth in the 
         preamble hereof.

                  (j)      "current per share market price" shall have the 
         meaning set forth in Section 11(d) hereof.

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

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

                  (m)      "equivalent preferred shares" shall have the meaning 
         set forth in Section 11(b) hereof.

                  (n)      "Exchange Act" shall mean the Securities Exchange Act
         of 1934, as amended.


                                      -5-

<PAGE>   9



                  (o)      "Exchange Ratio" shall have the meaning set forth in 
         Section 24(a) hereof.

                  (p)      "Exempt Person" shall mean the Company, any 
         Subsidiary (as such term is hereinafter defined) of the Company, in
         each case including, without limitation, in its fiduciary capacity,
         or, any employee benefit plan of the Company or of any Subsidiary of
         the Company, or any entity or trustee holding Common Stock for or
         pursuant to the terms of any such plan or for the purpose of funding
         any such plan or funding other employee benefits for employees of the
         Company or of any Subsidiary of the Company. 

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

                  (r)      "Nasdaq" shall mean the National Association of 
         Securities Dealers, Inc. Automated Quotations System.

                  (s)      "NYSE" shall mean the New York Stock Exchange, Inc. 

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

                  (u)      "Preferred Shares" shall mean shares of Series A 
         Junior Participating Preferred Stock, par value $1.00 per share, of the
         Company having the rights and preferences set forth in the Form of
         Certificate of Designations attached to this Agreement as Exhibit A.

                  (v)      "Purchase Price" shall have the meaning set forth in
         Section 7(b) hereof.

                  (w)      "Record Date" shall have the meaning set forth in the
         second paragraph hereof. 

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


                                      -6-

<PAGE>   10



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

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

                  (aa)     "Right" shall have the meaning set forth in the 
         second paragraph hereof.

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

                  (ac)     "Section 11(a)(iii) Trigger Date" shall have the 
         meaning set forth in Section 11(a)(iii) hereof.

                  (ad)     "Security" shall have the meaning set forth in 
         Section 11(d) hereof.

                  (ae)     "Spin-Off" shall mean the distribution by the Company
         to its common stockholders of the shares of common stock of Monterey
         Resources, Inc. that are owned by the Company, which distribution
         shall be deemed to have occurred on the Business Day next following
         the record date established by the Company for determining the
         stockholders of record of the Company entitled to receive such
         distribution.

                  (af)     "Stock Acquisition Date" shall mean the first date of
         public announcement by the Company or an Acquiring Person that an
         Acquiring Person has become such.

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

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

                  (ai)     "Summary of Rights" shall have the meaning set forth 
         in Section 3(b) hereof.

                  (aj)     "Trading Day" shall have the meaning set forth in 
         Section 11(d) hereof.


                                      -7-

<PAGE>   11



         Section 2.  Appointment of Rights Agent. The Company hereby appoints
the Rights Agent to act as agent for the Company and the holders of the Rights
(who, in accordance with Section 3 hereof, shall, prior to the Distribution
Date, also be the holders of the Common Stock) 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.

         Section 3.  Issue of Right Certificates. (a) Until the earlier of (i)
the tenth business day after the Stock Acquisition Date or (ii) the tenth
business day (or such later date as may be determined by action of the Board of
Directors of the Company prior to such time as any Person becomes an Acquiring
Person) after the date of the commencement by any Person (other than an Exempt
Person) of, or of the first public announcement of the intention of any Person
(other than an Exempt Person) to commence, a tender or exchange offer the
consummation of which would result in any Person becoming the Beneficial Owner
of shares of Common Stock aggregating 15% or more of the Common Stock then
outstanding (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 being herein
referred to as the "Distribution Date"), (x) the Rights will be evidenced
(subject to the provisions of Section 3(b) hereof) by the certificates for
Common Stock registered in the names of the holders thereof (which certificates
shall also be deemed to be Right Certificates) and not by separate Right
Certificates, and (y) the Rights will be transferable only in connection with
the transfer of Common Stock. As soon as practicable after the Distribution
Date, the Company will prepare and execute, the Rights Agent will countersign,
and the Company will send or cause to be sent (and the Rights Agent will, if
requested, send) by first-class, insured, postage prepaid mail, to each record
holder of Common


                                      -8-

<PAGE>   12



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 (a "Right Certificate"), evidencing
one Right for each share of Common Stock so held. As of 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 to Purchase Preferred Shares,
in substantially the form of Exhibit C hereto (the "Summary of Rights"), by
first-class, postage-prepaid mail, to each record holder of Common 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 Common Stock
outstanding as of the Record Date, until the Distribution Date, the Rights will
be evidenced by such certificates registered in the names of the holders
thereof together with a copy of the Summary of Rights attached thereto. Until
the Distribution Date (or the earlier of the Redemption Date or the Final
Expiration Date), the surrender for transfer of any certificate for Common
Stock outstanding on the Record Date, with or without a copy of the Summary of
Rights attached thereto, shall also constitute the transfer of the Rights
associated with the Common Stock represented thereby.

         (c)      Certificates for Common Stock which become outstanding 
(including, without limitation, reacquired Common Stock referred to in the last
sentence of this paragraph (c) that are subsequently issued or distributed by
the Company) after the Record Date but prior to the earliest of the
Distribution Date, the Redemption Date or the Final Expiration Date shall have
impressed on, printed on, written on or otherwise affixed to them the following
legend:

                  This certificate also evidences and entitles the holder
         hereof to certain rights as set forth in a Rights Agreement between
         Santa Fe Energy Resources, Inc. and First Chicago Trust Company of New
         York, dated as of March 3, 1997 (the "Rights


                                      -9-

<PAGE>   13



         Agreement"), the terms of which are hereby incorporated herein by
         reference and a copy of which is on file at the principal executive
         offices of Santa Fe Energy Resources, Inc. 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. Santa Fe Energy Resources, Inc. will mail to the
         holder of this certificate a copy of the Rights Agreement without
         charge after receipt of a written request therefor. Under certain
         circumstances, as set forth in the Rights Agreement, Rights owned by
         or transferred to any Person who becomes an Acquiring Person (as
         defined in the Rights Agreement) and certain transfers thereof will
         become null and void and will no longer be transferable.

         With respect to such certificate 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 surrender for transfer of any such certificate shall also constitute
the transfer of the Rights associated with the Common Stock represented
thereby. In the event that the Company purchases or acquires any Common Stock
after the Record Date but prior to the Distribution Date, any Rights associated
with such Common Stock shall be deemed cancelled and retired so that the
Company shall not be entitled to exercise any Rights associated with the Common
Stock which are no longer outstanding.

         Section 4.  Form of Right Certificates. The Right Certificates (and the
forms of election to purchase Preferred Shares and of assignment to be printed
on the reverse thereof) shall be substantially the same as 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 appropriate
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 Sections 11, 13 and 22 hereof, the Right Certificates


                                      -10-

<PAGE>   14



shall entitle the holders thereof to purchase such number of one one-hundredths
of a Preferred Share as shall be set forth therein at the price per one
one-hundredth of a Preferred Share set forth therein, but the number of such
one one-hundredths of a Preferred Share and the Purchase Price shall be subject
to adjustment as provided herein.

         Section 5.  Countersignature and Registration. (a) The Right
Certificates shall be executed on behalf of the Company by its Chairman of the
Board, its Chief Executive Officer, its President, any of its Vice Presidents,
or its Treasurer, either manually or by facsimile signature, shall have affixed
thereto the Company's seal or a facsimile thereof, and 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 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 Certificates, 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
Certificates 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, 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,


                                      -11-

<PAGE>   15

the number of Rights evidenced on its face by each of the Right Certificates
and the date of each of the Right Certificates.

         Section 6.  Transfer, Split Up, Combination and Exchange of Right
Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificates. (a)
Subject to the provisions of Section 14 hereof, at any time after the Close of
Business on the Distribution Date, and at or prior to the Close of Business on
the earlier of the Redemption Date or the Final Expiration Date, any Right
Certificate or Right Certificates (other than Right Certificates representing
Rights that have become void pursuant to Section 11(a)(ii) hereof or that have
been exchanged pursuant to Section 24 hereof) may be transferred, split up,
combined or exchanged for another Right Certificate or Right Certificates
entitling the registered holder to purchase a like number of one one-hundredths
of a Preferred Share as the Right Certificate or Right Certificates surrendered
then entitled such holder to purchase. Any registered holder desiring to
transfer, split up, combine or exchange any Right Certificate or Right
Certificates shall make such request in writing delivered to the Rights Agent,
and shall surrender the Right Certificate or Right Certificates to be
transferred, split up, combined or exchanged at the principal office of the
Rights Agent. Thereupon, the Rights Agent shall countersign and deliver to the
Person entitled thereto a Right Certificate or Right Certificates, 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 Certificates.

         (b)     Subject to the provisions of Section 11(a)(ii) hereof, at any 
time after the Distribution Date and prior to the close of business on the
earlier of the Redemption Date and the Final Expiration Date, upon receipt by
the Company and the Rights Agent of evidence reasonably


                                      -12-

<PAGE>   16



satisfactory to them of the loss, theft, destruction or mutilation of a Right
Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to them, and, at the Company's request,
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 make and deliver a new
Right Certificate of like tenor to the Rights Agent for delivery to the
registered holder in lieu of the Right Certificate so lost, stolen, destroyed
or mutilated.

         Section 7.  Exercise of Rights; Purchase Price; Expiration Date of
Rights. (a) 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 on the reverse side thereof
duly executed, to the Rights Agent at the principal office of the Rights Agent,
together with payment of the Purchase Price for each one one-hundredth of a
Preferred Share as to which the Rights are exercised, at or prior to the
earliest of (i) the Close of Business on March 3, 2000, (ii) the Close of
Business on the second anniversary of the Spin-Off (the earlier of the events
described in clauses (i) and (ii) of this sentence being referred to as the
"Final Expiration Date"), (ii) the time at which the Rights are redeemed as
provided in Section 23 hereof (the "Redemption Date") and (iii) the time at
which such Rights are exchanged as provided in Section 24 hereof.

         (b)      The Purchase Price for each one one-hundredth of a Preferred 
Share purchasable pursuant to the exercise of a Right shall initially be
$42.00, and shall be subject to adjustment from time to time as provided in
Section 11 or 13 hereof (the "Purchase Price") and shall be payable in lawful
money of the United States of America in accordance with paragraph (c) of this
Section 7.


                                      -13-

<PAGE>   17



         (c)      Upon receipt of a Right Certificate representing exercisable
Rights, with the form of election to purchase duly executed, accompanied by
payment of the Purchase Price for the shares to be purchased and an amount
equal to any applicable transfer tax required to be paid by the holder of such
Right Certificate in accordance with Section 9 hereof by certified check,
cashier's check or money order payable to the order of the Company, the Rights
Agent shall thereupon promptly (i) (A) requisition from any transfer agent of
the Preferred Shares certificates for the number of Preferred Shares to be
purchased and the Company hereby irrevocably authorizes any such transfer agent
to comply with all such requests, or (B) requisition from the depositary agent
depositary receipts representing such number of one one-hundredths of a
Preferred Share as are to be purchased (in which case certificates for the
Preferred Shares represented by such receipts shall be deposited by the
transfer agent of the Preferred Shares with such depositary agent) and the
Company hereby directs such depositary agent to comply with such request; (ii)
when appropriate, requisition from the Company the amount of cash to be paid in
lieu of issuance of fractional shares in accordance with Section 14 hereof;
(iii) promptly after receipt of such certificates or depositary receipts, cause
the same to be delivered to or upon the order of the registered holder of such
Right Certificate, regis tered in such name or names as may be designated by
such holder; and (iv) when appropriate, after receipt, deliver such cash to or
upon the order of the registered holder of such Right Certificate.

         (d)      Except as otherwise provided herein, in case the registered 
holder of any Right Certificate shall exercise less than all the Rights
evidenced thereby, a new Right Certificate evidencing Rights equivalent to the
Rights remaining unexercised shall be issued by the Rights Agent to the
registered holder of such Right Certificate or to his duly authorized assigns,
subject to the provisions of Section 14 hereof.


                                      -14-

<PAGE>   18



         (e)      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 Rights upon the occurrence of any
purported transfer or exercise of Rights pursuant to Section 6 hereof or 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 Rights Certificate surrendered for such
transfer or exercise and (ii) provided such additional evidence of the identity
of the Beneficial Owner (or former Beneficial Owner) 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 to any of its
agents be delivered to the Rights Agent for cancellation or in cancelled form,
or, if surrendered to the Rights Agent, shall be cancelled by it, and no Right
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the provisions of this 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, destroy such cancelled Right Certificates, and,
in such case, shall deliver a certificate of destruction thereof to the
Company.

         Section 9.  Availability of Preferred Shares.  (a) The Company 
covenants and agrees that it will cause to be reserved and kept available out
of its authorized and unissued Preferred Shares or any Preferred Shares held in
its treasury, the number of Preferred Shares that will be sufficient to


                                      -15-

<PAGE>   19



permit the exercise in full of all outstanding Rights in accordance with
Section 7. The Company covenants and agrees that it will take all such action
as may be necessary to ensure that all Preferred Shares delivered upon exercise
of Rights shall at the time of delivery of the certificates for such Preferred
Shares (subject to payment of the Purchase Price), be duly and validly
authorized and issued and fully paid and nonassessable shares.

         (b)      So long as the shares of Preferred Stock (and, following the 
time that a Person becomes an Acquiring Person, shares of Common Stock and
other securities) issuable upon the exercise of Rights may be listed or
admitted to trading on the NYSE or listed on any other national securities
exchange or quotation system, 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 or admitted to trading on the NYSE or listed on
any other exchange or quotation system upon official notice of issuance upon
such exercise.

         (c)      From and after such time as the Rights become exercisable, the
Company shall use its best efforts, if then necessary to permit the issuance of
shares of Preferred Stock (and following the time that a Person first becomes
an Acquiring Person, shares of Common Stock and other securities) upon the
exercise of Rights, to register and qualify such shares of Preferred Stock (and
following the time that a Person first becomes an Acquiring Person, shares of
Common Stock and other securities) under the Securities Act and any applicable
state securities or "Blue Sky" laws (to the extent exemptions therefrom are not
available), cause such registration statement and qualifications to become
effective as soon as possible after such filing and keep such registration and
qualifications effective until the earlier of the date as of which the Rights
are no longer exercisable for such securities and the Final Expiration Date.
The Company may temporarily suspend, for a


                                      -16-

<PAGE>   20



period of time not to exceed 90 days, the exercisability of the Rights in order
to prepare and file a registration statement under the Securities Act 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 and until a registration statement under the Securities Act (if
required) shall have been declared effective.

         (d)      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 of any Preferred Shares 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 the
issuance or delivery of certificates or depositary receipts for the Preferred
Shares in a name other than that of, the registered holder of the Right
Certificate evidencing Rights surrendered for exercise or to issue or to
deliver any certificates or depositary receipts for Preferred Shares upon the
exercise of any Rights until any 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 reasonable satisfaction that
no such tax is due.

         Section 10.  Preferred Shares Record Date. Each Person in whose name
any certificate for Preferred Shares is issued upon the exercise of Rights
shall for all purposes be deemed to have become the holder of record of the
Preferred Shares represented thereby on, and such certificate shall


                                      -17-

<PAGE>   21



be dated, the date upon which the Right Certificate evidencing such Rights was
duly surrendered and payment of the Purchase Price (and any applicable transfer
taxes) was made; provided, however, that if the date of such surrender and
payment is a date upon which the Preferred Shares transfer books of the Company
are closed, such Person shall be deemed to have become the record holder of
such shares on, and such certificate shall be dated, the next succeeding
Business Day on which the Preferred Shares 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 holder of Preferred
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.

         Section 11.  Adjustment of Purchase Price, Number of Shares or Number
of Rights. The Purchase Price, the number of Preferred Shares or other
securities or property 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 Shares
         payable in Preferred Shares, (B) subdivide the outstanding Preferred
         Shares, (C) combine the outstanding Preferred Shares into a smaller
         number of Preferred Shares or (D) issue any shares of its capital
         stock in a reclassification of the Preferred Shares (including any
         such reclassification in connection with a consolidation or merger in
         which the Company is the continuing or surviving corporation), except
         as otherwise provided in this Section 11(a), the Purchase Price in
         effect at the time of the record date for such dividend or of the
         effective date of such subdivision, combination


                                      -18-

<PAGE>   22



         or reclassification, and the number and kind of shares of capital
         stock issuable on such date, shall be proportionately adjusted so that
         the holder of any Right exercised after such time shall be entitled to
         receive the aggregate number and kind of shares of capital stock
         which, if such Right had been exercised immediately prior to such date
         and at a time when the Preferred Share transfer books of the Company
         were open, such holder would have owned upon such exercise and been
         entitled to receive by virtue of such dividend, subdivision,
         combination or reclassification; provided, however, that in no event
         shall the consideration to be paid upon the exercise of one Right be
         less than the aggregate par value of the shares of capital stock of
         the Company issuable upon exercise of one Right.

                  (ii)     Subject to Section 24 of this Agreement, in the event
         any Person becomes an Acquiring Person, then (A) the Purchase Price
         shall be adjusted to be the Purchase Price in effect immediately prior
         to such Person becoming an Acquiring Person multiplied by the number
         of one one-hundredths of a Preferred Share for which a Right was
         exercisable immediately prior to such Person becoming an Acquiring
         Person, whether or not such Right was then exercisable, and (B) each
         holder of a Right, except as otherwise provided in this Section
         11(a)(ii) and Subsection 11(a)(iii) hereof, shall thereafter have the
         right to receive, upon exercise at a price equal to the Purchase Price
         (as so adjusted), in accordance with the terms of this Agreement and
         in lieu of Preferred Shares, such number of shares of Common Stock as
         shall equal the result obtained by (x) multiplying the then current
         Purchase Price by the number of one one-hundredths of a Preferred
         Share for which a Right is then exercisable and dividing that product
         by (y) 50% of the then current per share market price of the Company's
         Common Stock (determined pursuant to Section 11(d) hereof) on the date


                                      -19-

<PAGE>   23



         such Person became an Acquiring Person; provided, however, that the
         Purchase Price and the number of shares of Common Stock so receivable
         upon exercise of a Right shall thereafter be subject to further
         adjustment as appropriate in accordance with Section 11(f) hereof.
         Notwithstanding anything in this Agreement to the contrary, however,
         from and after the time (the "invalidation time") when any Person
         first becomes an Acquiring Person (or any such Affiliate or Associate)
         who becomes a transferee after the invalidation time or (z) a
         transferee of any Acquiring Person (or any such Affiliate or
         Associate) who became a transferee prior to or concurrently with the
         invalidation time pursuant to either (I) a transfer from the Acquiring
         Person to holders of its equity securities or to any person with whom
         it has any continuing agreement, arrangement or understanding
         regarding the transferred Rights or (II) a transfer which the Board of
         Directors has determined is part of a plan, arrangement or
         understanding which has the purpose or effect of avoiding the
         provisions of this paragraph, and subsequent transferees of such
         Persons, shall be void without any further action and any holder of
         such Rights shall thereafter have no rights whatsoever with respect to
         such Rights under any provision of this Agreement. The Company shall
         use all reasonable efforts to ensure that the provisions of this
         Section 11(a)(ii) are complied with, but shall have no liability to
         any holder of Right Certificates or other Person as a result of its
         failure to make any determinations with respect to an Acquiring Person
         or its Affiliates, Associates or transferees hereunder. From and after
         the invalidation time, no Right Certificate shall be issued pursuant
         to Section 3 or Section 6 hereof that represents Rights that are or
         have become void pursuant to the provisions of this paragraph, and any
         Right Certificate delivered to the Rights Agent that represents Rights
         that are or have become void pursuant to the


                                      -20-

<PAGE>   24



         provisions of this paragraph shall be cancelled. From and after the
         occurrence of an event specified in Section 13(a) hereof, any Rights
         that theretofore have not been exercised pursuant to this Section
         11(a)(ii) shall thereafter be exercisable only in accordance with
         Section 13 and not pursuant to this Section 11(a)(ii).

                  (iii)     In the event that there shall not be sufficient 
         Common Shares issued but not outstanding or authorized but unissued to
         permit the exercise in full of the Rights in accordance with the
         subparagraph (ii) of this Section 11(a), the Company shall take all
         such action as may be necessary to authorize additional Common Shares
         for issuance upon exercise of the Rights. In the event the Company
         shall, after good faith effort, be unable to take all such action as
         may be necessary to authorize such additional Common Shares the
         Company shall, to the extent permitted by applicable law and any
         material agreements then in effect to which the Company is a party,
         (A) determine the excess of (1) the value of the shares of Common
         Stock issuable upon the exercise of a Right in accordance with the
         foregoing subparagraph (ii) (the "Current Value") over (2) the then
         current Purchase Price multiplied by the number of one one-hundredths
         of Preferred Shares for which a Right was exercisable immediately
         prior to the time that the Acquiring Person became such (such excess,
         the "Spread"), and (B) with respect to each Right (other than Rights
         which have become void pursuant to Section 11(a)(ii)), make adequate
         provision to substitute for the shares of Common Stock issuable in
         accordance with subparagraph (ii) upon exercise of the Right and
         payment of the applicable Purchase Price, (1) cash, (2) a reduction in
         the Purchase Price, (3) Preferred Shares or other equity securities of
         the Company (including, without limitation, shares or fractions of
         shares of preferred stock which, by virtue of having


                                      -21-

<PAGE>   25



         dividend, voting and liquidation rights substantially comparable to
         those of the shares of Common Stock, are deemed in good faith by the
         Board of Directors to have substantially the same value as the shares
         of Common Stock (such shares of preferred stock and shares or
         fractions of shares of preferred stock are hereinafter referred to as
         "Common Stock equivalents")), (4) debt securities of the Company, (5)
         other assets, or (6) any combination of the foregoing, having a value
         which, when added to the value of the shares of Common Stock actually
         issued upon exercise of such Right, shall have an aggregate value
         equal to the Current Value (less the amount of any reduction in the
         Purchase Price), where such aggregate value has been determined by the
         Board of Directors upon the advice of a nationally recognized
         investment banking firm selected in good faith by the Board of
         Directors; provided, however, if the Company shall not make adequate
         provision to deliver value pursuant to clause (B) above within 30 days
         following the date that the Acquiring Person became such (the "Section
         11(a)(ii) Trigger Date"), then the Company shall be obligated to
         deliver, to the extent permitted by applicable law and any material
         agreements then in effect to which the Company is a party, 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, such number of fractions of shares of Preferred
         Stock (to the extent available) and then, if necessary, cash, which
         shares and/or cash have an aggregate value equal to the Spread. If,
         upon the date any Person becomes an Acquiring Person, the 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, then, if the Board of
         Director so elects, the 30 day period set forth above may be extended
         to the


                                      -22-

<PAGE>   26



         extent necessary, but not more than 90 days after the Section
         11(a)(ii) Trigger Date, in order that the Company may seek stockholder
         approval for the authorization of such additional shares (such 30-day
         period, as it may be extended, is herein called the "Substitution
         Period"). To the extent that the Company determines that some action
         need be taken pursuant to the second and/or third sentence of this
         Section 11(a)(iii), the Company (x) shall provide, subject to Section
         11(a)(ii) hereof and the last sentence of this Section 11(a)(iii)
         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 such second sentence and
         to determine the value thereof. In the event of 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. For purposes of this Section 11(a)(iii), the value of the
         shares of Common Stock shall be the current per share market price (as
         determined pursuant to Section 11(d)(i)) on the Section 11(a)(ii)
         Trigger Date and the per share or fractional value of any "Common
         Stock equivalent" shall be deemed to equal the current per share
         market price of the Common Stock. The Board of Directors of the
         Company may, but shall not be required to, establish procedures to
         allocate the right to receive shares of Common Stock upon the exercise
         of the Rights among holders of Rights pursuant to this Section
         11(a)(iii). 

         (b)     In case the Company shall fix a record date for the issuance of
rights, options or warrants to all holders of Preferred Shares entitling them
(for a period expiring within 45 calendar


                                      -23-

<PAGE>   27



days after such record date) to subscribe for or purchase Preferred Shares (or
shares having the same rights, privileges and preferences as the Preferred
Shares ("equivalent preferred shares")) or securities convertible into
Preferred Shares or equivalent preferred shares at a price per Preferred Share
or equivalent preferred share (or having a conversion price per share, if a
security convertible into Preferred Shares or equivalent preferred shares) less
than the then current per share market price of the Preferred Shares on such
record date, the Purchase Price to be in effect after such record date shall be
determined by multiplying the Purchase Price in effect immediately prior to
such record date by a fraction, the numerator of which shall be the number of
Preferred Shares outstanding on such record date plus the number of Preferred
Shares which the aggregate offering price of the total number of Preferred
Shares and/or equivalent preferred shares so to he 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 Preferred Shares outstanding on such record date
plus the number of additional Preferred Shares and/or equivalent preferred
shares to be offered for subscription or purchase (or into which the
convertible securities so to be offered are initially convertible); provided,
however, that in no event shall the consideration to be paid upon the exercise
of one Right be less than the aggregate par value of the shares of capital
stock of the Company issuable upon exercise of one Right. In case such
subscription price may be paid in a consideration part or all of which shall be
in a form other than cash, the value of such consideration shall be 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.
Preferred Shares 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


                                      -24-

<PAGE>   28



in the event that such rights, options or warrants are not so issued, the
Purchase Price shall be adjusted to be the Purchase Price that would then be in
effect if such record date had not been fixed.

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

         (d)(i)  For the purpose of any computation hereunder, the "current per
share market price" of any security (a "Security" for the purpose of this
Section 11(d)(i)) on any date shall be deemed


                                      -25-

<PAGE>   29



to be the average of the daily closing prices per share of such Security for
the 30 consecutive Trading Days immediately prior to such date; provided,
however, that in the event that the current per share market price of the
Security is determined during a period following the announcement by the issuer
of such Security of (A) a dividend or distribution on such Security payable in
shares of such Security or securities convertible into such shares, or (B) any
subdivision, combination or reclassification of such Security and prior to the
expiration of 30 Trading Days 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 per share market
price shall be appropriately adjusted to reflect the current market price per
share equivalent of such Security. The closing price for each day shall be the
lost 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 NYSE or, if the
Security is not listed or admitted to trading on the NYSE, as reported in the
principal consolidated transaction reporting system with respect to securities
listed on the principal national securities exchange on which the Security is
listed or admitted to trading or, if the Security is not listed or admitted to
trading on any national securities exchange, the last quoted price or, if not
so quoted, the average of the high bid and low asked prices in the
over-the-counter market, as reported by Nasdaq or such other system then in
use, or, if on any such date the Security is not quoted by any such
organization, the average of the closing bid and asked prices as furnished by a
professional market maker making a market in the Security selected by the Board
of Directors of the Company. The term "Trading Day" shall mean a day on which
the principal national securities exchange on which the Security is listed or
admitted to trading is open for the transaction of business or, if the


                                      -26-

<PAGE>   30



Security is not listed or admitted to trading on any national securities
exchange on which the security is listed or admitted to trading on any national
securities exchange, a Business Day.

         (ii)     For the purpose of an computation hereunder, the "current per
share market price" of the Preferred Shares shall be determined in accordance
with the method set forth in Section 11(d)(i). If the Preferred Shares are not
publicly traded, the "current per share market price of the Preferred Shares
shall be conclusively deemed to be the current per share market price of the
Common Shares as determined pursuant to Section 11(d)(i) (appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date hereof), multiplied by 100. If neither the Common
Shares nor the Preferred Shares is publicly held or so listed or traded,
"current per share market price" shall mean the fair value per share as
determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent.

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


                                      -27-

<PAGE>   31



         (f)     If, as a result of an adjustment made pursuant to Section 11(a)
hereof, the holder of any Right thereafter exercised shall become entitled to
receive any shares of capital stock of the Company other than Preferred Shares,
thereafter the number of such other shares so receivable upon exercise of any
Right shall be subject to adjustment from time to time in a manner and on terms
as nearly equivalent as practicable to the provisions with respect to the
Preferred Shares contained in Section 11(a) through (c), inclusive, and the
provisions of Sections 7, 9, 10 and 13 with respect to the Preferred Shares
shall apply on like terms to any such other shares.

         (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 one-hundredths of a
Preferred Share 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 one-hundredths of a Preferred Share (calculated to the nearest one
ten-thousandth of a Preferred Share) obtained by (A) multiplying (x) the number
of one one-hundredths of a share covered by a Right immediately prior to this
adjustment by (y) the Purchase Price in effect immediately prior to such
adjustment of the Purchase Price and (B) dividing the product so obtained by
the Purchase Price in effect immediately after such adjustment of the Purchase
Price.

         (i)      The Company may elect on or after the date of any adjustment 
of the Purchase Price to adjust the number of Rights in substitution for any
adjustment in the number of


                                      -28-

<PAGE>   32



one one-hundredths of a Preferred Share purchasable upon the exercise of a
Right. Each of the Rights outstanding after such adjustment of the number of
Rights shall be exercisable for the number of one one-hundredths of a Preferred
Share for which a Right was exercisable immediately prior to such adjustment.
Each Right held of record prior to such adjustment of the number of Rights
shall become that number of Rights (calculated to the nearest one
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 member 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, such record date shall be at least 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 Certificates evidencing,
subject to Section 14 hereof, the additional Rights to which such holders shall
be entitled as a result of such adjustment, or, at the option of the 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 he
entitled after such adjustment. Right Certificates to be so distributed shall
be issued, executed and countersigned in the manner provided for herein and
shall be registered in the names of the holders of record of Right Certificates
on the record date specified in the public announcement.


                                      -29-

<PAGE>   33



         (j)     Irrespective of any adjustment or change in the Purchase Price 
or the number of one one-hundredths of a Preferred Share issuable upon the
exercise of the Rights, the Right Certificates theretofore and thereafter
issued may continue to express the Purchase Price and the number of one
one-hundredths of a Preferred 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 one one-hundredth of the then par value, if
any, of the Preferred Shares or other shares of capital 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 Preferred Shares or
other such shares 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 issuing to the holder of any Right exercised after such record date
of the Preferred Shares and other capital stock or securities of the Company,
if any, issuable upon such exercise over and above the Preferred Shares 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 upon the occurrence of the event requiring such adjustment.

         (m)     Anything in this Section 11 to the contrary notwithstanding, 
the Company shall be entitled to make such reductions in the Purchase Price, in
addition to those adjustments expressly


                                      -30-

<PAGE>   34



required by this Section 11, as and to the extent that it, in its sole
discretion, shall determine to be advisable in order that any consolidation or
subdivision of the Preferred Shares, issuance wholly for cash of any Preferred
Shares at less than the current market price, issuance wholly for cash of
Preferred Shares or securities which by their terms are convertible into or
exchangeable for Preferred Shares, dividends on Preferred Shares payable in
Preferred Shares or issuance of rights, options or warrants referred to
hereinabove in Section 11(b), hereafter made by the Company to holders of its
Preferred Shares shall not be taxable to such stockholders.

         (n)     In the event that at any time after the date of this Agreement 
and prior to the Distribution Date, the Company shall pay any dividend or
distribution to the holders of its Common Stock consisting of evidences of its
indebtedness or other assets, including, without limitation, shares of capital
stock of the Company (other than Common Stock and Preferred Shares) and shares
of capital stock of any Subsidiary or consisting of any investment by the
Company but excluding quarterly cash dividends, then in any such case the
Purchase Price to be in effect after the payment date of such dividend or
distribution shall be determined by multiplying the Purchase Price in effect
immediately prior to the record date for such payment by a fraction, the
numerator of which shall be an amount equal to the then current market price of
the Common Stock on the business day immediately preceding such payment 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 assets or evidences of
indebtedness so paid in respect of one share of Common Stock and the
denominator of which shall be the current per share market price of the Common
Stock on the business day immediately preceding such payment date; provided,
however, that in no event shall the consideration to be paid upon the exercise
of one Right


                                      -31-

<PAGE>   35



be less than the aggregate par value of the shares of capital stock of the
Company to be issued upon exercise of one Right. In the event that at any time
after the date of this Agreement and prior to the Distribution Date, the
Company shall (i) declare or pay any dividend on the Common Stock payable in
Common Stock or (ii) effect a subdivision, combination or consolidation of the
Common Stock (by reclassification or otherwise than by payment of dividends in
Common Stock) into a greater or lesser number of shares of Common Stock, then
in any such case (A) the number of one one-hundredths of a Preferred Share
purchasable after such event upon proper exercise of each Right shall be
determined by multiplying the number of one one-hundredths of a Preferred Share
so purchasable immediately prior to such event by a fraction, the numerator of
which is the number of shares of Common Stock outstanding immediately before
such event and the denominator of which is the number of shares of Common Stock
outstanding immediately after such event, and (B) 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 Common Stock outstanding immediately
prior to such event had issued with respect to it. The adjustments provided for
in this Section 11(n) shall be made successively whenever such a dividend is
declared or paid or such a subdivision, combination or consolidation is
effected.

         Section 12.  Certificate of Adjusted Purchase Price or Number of
Shares. Whenever an adjustment is made as provided in Section 11 or 13 hereof,
the Company shall promptly (a) prepare a certificate setting forth such
adjustment, and a brief statement of the facts accounting for such adjustment,
(b) file with the Rights Agent and with each transfer agent for the Common
Stock or the Preferred Shares a copy of such certificate and (c) mail a brief
summary thereof to each holder of a Right Certificate in accordance with
Section 23 hereof.


                                      -32-

<PAGE>   36



         Section 13.  Consolidation, Merger or Sale or Transfer of Assets or
Earning Power. (a) In the event, directly or indirectly, at any time after any
Person has become an Acquiring Person, (i) the Company shall consolidate with,
or merge with and into, any other Person, (ii) any Person shall consolidate
with the Company, or merge with and into the Company and the Company shall be
the continuing or surviving corporation of such merger and, in connection with
such merger, all or part of the Common Shares shall be changed into or
exchanged for stock or other securities of any other Person (or the Company) or
cash or any other property, or (iii) the Company shall sell or otherwise
transfer (or one or more of its Subsidiaries shall sell or otherwise transfer),
in one or more transactions, assets or earning power aggregating 50% or more of
the assets or earning power of the Company and its Subsidiaries (taken as a
whole) to any other Person (other than the Company or one or more of its
wholly-owned Subsidiaries), then, and in each such case, proper provision shall
be made so that (A) each holder of a Right (other than Rights that have become
void pursuant to Section 11(a)(ii)) shall thereafter have the right to receive,
upon the exercise thereof at a price equal to the then current Purchase Price
multiplied by the number of one one-hundredths of a Preferred Share for which a
Right is then exercisable, in accordance with the terms of this Agreement and
in lieu of Preferred Shares, such number of validly issued, fully paid and
non-assessable and freely tradeable shares of Common Stock of the Principal
Party (as defined herein) not subject to any liens, encumbrances, rights of
first refusal or other adverse claims, as shall equal the result obtained by
(I) multiplying the then current Purchase Price by the number of one
one-hundredths of a Preferred Share for which a Right is then exercisable and
dividing that product by (II) 50% of the then current per share market price of
the Common Stock of such Principal Party (determined in accordance to Section
11(d)(i) hereof) on the date of consummation of such consolidation, merger,
sale or transfer;


                                      -33-

<PAGE>   37



provided that the Purchase Price and the number of shares of Common Stock of
such Principal Party issuable upon exercise of each Right shall be further
adjusted as provided in Section 11(f) of this Agreement to reflect any events
occurring in respect of such Principal Party after the date of such
consolidation, merger, sale or transfer; (B) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such consolidation,
merger, sale or transfer, all the obligations and duties of the Company
pursuant to this Agreement; (C) the term "Company" shall thereafter be deemed
to refer to such Principal Party; and (D) such Principal Party shall take such
steps (including, but not limited to, the reservation of a sufficient number of
its shares of Common Stock in accordance with Section 9 hereof) in connection
with such consummation of any such transaction as may be necessary to assure
that the provisions hereof shall thereafter be applicable, as nearly as
reasonably may be, in relation to the shares of its Common Stock thereafter
deliverable upon the exercise of the Rights; provided that, upon the subsequent
occurrence of any consolidation, merger, sale or transfer of assets or other
extraordinary transaction in respect of such Principal Party, each holder of a
Right shall thereupon be entitled to receive, upon exercise of a Right and
payment of the Purchase Price as provided in this Section 13(a), such cash,
shares, rights, warrants and other property which such holder would have been
entitled to receive had such holder, at the time of such transaction, owned the
Common Stock of the Principal Party receivable upon the exercise of a Right
pursuant to this Section 13(a), and such Principal Party shall take such steps
(including, but not limited to, reservation of shares of stock) as may be
necessary to permit the subsequent exercise of the Rights in accordance with
the terms hereof for such cash, shares, rights, warrants and other property.

         (b)      As used in this Section 13, "Principal Party" shall mean


                                      -34-

<PAGE>   38



                  (i)      in the case of any transaction described in clause 
         (i) or (ii) of the first sentence of Section 13(a) hereof: (A) the
         Person that is the issuer of the securities into which the shares of
         Common Stock are converted in such merger or consolidation, or, if
         there is more than one such issuer, the issuer the shares of Common
         Stock of which have the greatest aggregate market value of shares
         outstanding, or (B) if no securities are so issued, (x) the Person
         that is the other party to the merger, if such Person survives said
         merger, or, if there is more than one such Person, the Person the
         shares of Common Stock of which have the greatest aggregate market
         value of shares outstanding or (y) if the Person that is the other
         party to the merger does not survive the merger, the Person that does
         survive the merger (including the Company if it survives) or (z) the
         Person resulting from the consolidation; and

                  (ii)     in the case of any transaction described in clause 
         (iii) of the first sentence in Section 13(a) hereof, the Person that
         is the party receiving the greatest portion of the assets or earning
         power transferred pursuant to such transaction or transactions, or, if
         each Person that is a party to such transaction or transactions
         receives the same portion of the assets or earning power so
         transferred or if the Person receiving the greatest portion of the
         assets or earning power cannot be determined, whichever of such
         Persons as is the issuer of Common Stock having the greatest aggregate
         market value of shares outstanding; provided, however, that in any
         such case described in the foregoing clause (b)(i) or (b)(ii), if the
         Common Stock of such Person is not at such time or has not been
         continuously over the preceding 12-month period registered under
         Section 12 of the Exchange Act, then (1) if such Person is a direct or
         indirect Subsidiary of another Person the Common Stock of which is and
         has been so registered, the term "Principal Party" shall refer to such
         other Person, or (2) if such Person


                                      -35-

<PAGE>   39



         is a Subsidiary, directly or indirectly, of more than one Person, and
         the Common Stocks of all of such persons have been so registered, the
         term "Principal Party" shall refer to whichever of such Persons is the
         issuer of Common Stock having the greatest aggregate market value of
         shares outstanding, or (3) if such Person is owned, directly or
         indirectly, by a joint venture formed by two or more Persons that are
         not owned, directly or indirectly, by the same Person, the rules set
         forth in clauses (1) and (2) above shall apply to each of the owners
         having an interest in the venture as if the Person owned by the joint
         venture was a Subsidiary of both or all of such joint venturers, and
         the Principal Party in each such case shall bear the obligations set
         forth in this Section 13 in the same ratio as its interest in such
         Person bears to the total of such interests. 

         (c)      The Company shall not consummate any consolidation, merger, 
sale or transfer referred to in Section 13(a) hereof unless prior thereto the
Company and the Principal Party involved therein shall have executed and
delivered to the Rights Agent an agreement confirming that the requirements of
Sections 13(a) and (b) hereof shall promptly be performed in accordance with
their terms and that such consolidation, merger, sale or transfer of assets
shall not result in a default by the Principal Party under this Agreement as
the same shall have been assumed by the Principal Party pursuant to Sections
13(a) and (b) hereof and providing that, as soon as practicable after executing
such agreement pursuant to this Section 13, the Principal Party will:

                  (i)      prepare and file a registration statement under the
         Securities Act, if necessary, with respect to the Rights and the
         securities purchasable upon exercise of the Rights on an appropriate
         form, use its best efforts to cause such registration statement to
         become effective as soon as practicable after such filing and use its
         best efforts to cause such registration


                                      -36-

<PAGE>   40



         statement to remain effective (with a prospectus at all times meeting
         the requirements of the Securities Act) until the Final Expiration
         Date, and similarly comply with applicable state securities laws;

                  (ii)     use its best efforts, if the Common Stock of the
         Principal Party shall be listed or admitted to trading on the New York
         Stock Exchange or on another national securities exchange, to list or
         admit to trading (or continue the listing of) the Rights and the
         securities purchasable upon exercise of the Rights on the New York
         Stock Exchange or such securities exchange, or, if the Common Stock of
         the Principal Party shall not be listed or admitted to trading on the
         New York Stock Exchange or a national securities exchange, to cause
         the Rights and the securities receivable upon exercise of the Rights
         to be reported by such other system then in use;

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

                  (iv)     obtain waivers of any rights of first refusal or 
         preemptive rights in respect of the Common Stock of the Principal
         Party subject to purchase upon exercise of outstanding Rights.

         (d)      In case the Principal Party has provision in any of its 
authorized securities or in its certificate of incorporation or by-laws or
other instrument governing its corporate affairs, which provision would have
the effect of (i) causing such Principal Party to issue (other than to holders
of Rights pursuant to this Section 13), in connection with, or as a consequence
of, the consummation of a transaction referred to in this Section 13, shares of
Common Stock of such Principal Party at less


                                      -37-

<PAGE>   41



than the then current market price per share thereof (determined pursuant to
Section 11(d) hereof) or securities exercisable for, or convertible into,
Common Stock of such Principal Party at less than such then current market
price, or (ii) providing for any special payment, tax or similar provision in
connection with the issuance of the Common Stock of such Principal Party
pursuant to the provisions of Section 13, then, in such event, the Company
hereby agrees with each holder of Rights that it shall not consummate any such
transaction unless prior thereto the Company and such Principal Party shall
have executed and delivered to the Rights Agent a supplemental agreement
providing that the provision in question of such Principal Party shall have
been cancelled, waived or amended, or that the authorized securities shall be
redeemed, so that the applicable provision will have no effect in connection
with, or as a consequence of, the consummation of the proposed transaction.

         (e)     The Company covenants and agrees that it shall not, at any time
after a Person first becomes an Acquiring Person enter into any transaction of
the type contemplated by any of clauses (i) - (iii) of Section 13(a) hereof if
(x) at the time of or immediately after such consolidation, merger, sale,
transfer or other transaction there are any rights, warrants or other
instruments or securities outstanding or agreements in effect which would
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights, (y) prior to, simultaneously with or immediately after
such consolidation, merger, sale, transfer of other transaction, the
stockholders of the Person who constitutes, or would constitute, the Principal
Party for purposes of Section 13(a) hereof shall have received a distribution
of Rights previously owned by such Person or any of its Affiliates or
Associates or (z) the form or nature of organization of the Principal Party
would preclude or limit the exercisability of the Rights.


                                      -38-

<PAGE>   42



         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 Certificates
with regard to which such fractional Rights would otherwise be issuable, an
amount in cash equal to the same fraction of the current market value of a
whole Right. For the purposes of this Section 14(a), the current market value
of a whole Right shall be the closing price of the Rights for the Trading Day
immediately prior to the date on which such fractional Rights would have been
otherwise issuable. The closing price for any day shall be the last sale price,
regular way, or, in case no such sale takes place on such day, the average of
the closing bid and asked prices, regular way, in either case, as reported in
the principal consolidated transaction reporting system with respect to
securities listed or admitted to trading on the NYSE or, if the Rights are not
listed or admitted to trading on the NYSE, as reported in the principal
consolidated transaction reporting system with respect to securities listed on
the principal national securities exchange on which the Rights are listed or
admitted to trading or, if the Rights are not listed or admitted to trading on
any national securities exchange, the last quoted price or, if not so quoted,
the average of the high bid and low asked prices in the over-the-counter
market, as reported by Nasdaq or such other system then in use or, if on any
such date the Rights are not quoted by any such organization, the average of
the closing bid and asked prices as furnished by a professional market maker
making a market in the Rights selected by the Board of Directors of the
Company. If on any such date no such market maker is making a market in the
Rights, the fair value of the Rights on such date as determined in good faith
by the Board of Directors of the Company shall be used.


                                      -39-

<PAGE>   43



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

         (c)     The Company shall not be required to issue fractions of shares 
of Common Stock or to distribute certificates which evidence fractional shares
of Common Stock upon the exercise or exchange of Rights. In lieu of such
fractional shares of Common Stock, the Company shall pay to the registered
holders of the Right Certificates with regard to which such fractional shares
of Common Stock 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 (as
determined in accordance with


                                      -40-

<PAGE>   44



Section 14(a) hereof) for the Trading Day immediately prior to the date of such
exercise or exchange.

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

         Section 15.  Rights of Action. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
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 the holders of Rights, it is
specifically acknowledged that the holders of Rights would not have an adequate
remedy at law for any breach of this Agreement and will be entitled to specific
performance of the obligations under, and injunctive relief against actual or
threatened violations of the obligations of any Person subject to, this
Agreement.

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


                                      -41-

<PAGE>   45



                  (a)      prior to the Distribution Date, the Rights will be 
         transferable only in connection with the transfer of the 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 agency of the Rights Agent
         designated for such purpose, duly endorsed or accompanied by a proper
         instrument of transfer; and

                  (c)      the Company and the Rights Agent may deem and treat 
         the Person in whose name the Right Certificate (or, prior to the
         Distribution Date, the associated Common 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 Certificates 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 shall be
         affected by any notice to the contrary.

         Section 17. Right Certificate Holder Not Deemed a Stockholder. No 
holder, as such, of any Right Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Preferred Shares or
any other securities of the 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 25 hereof), or to receive dividends
or subscription rights, or otherwise, until the Right or


                                      -42-

<PAGE>   46



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 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 arising therefrom,
directly or indirectly.

         (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 the Preferred Shares or 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 document believed by it to be genuine
and to be signed, executed and, where necessary, verified or acknowledged, by
the proper Person or Persons, or otherwise upon the advice of counsel as set
forth in Section 20 hereof.

         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


                                      -43-

<PAGE>   47



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


                                      -44-

<PAGE>   48



         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 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 specifically prescribed)
         may be deemed to be conclusively proved and established by a
         certificate signed by my one of the Chairman of the Board, the Chief
         Executive Officer, the President, any Vice President, the Treasurer or
         the Secretary of the Company and delivered to the Rights Agent; and
         such certificate 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 to the 
         Company and any other Person 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 (except its countersignature
         thereof) or be required to verify the same, but all such statements
         and recitals are and shall be deemed to have been made by the Company
         only.


                                      -45-

<PAGE>   49



                  (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 change in the exercisability of the Rights
         (including the Rights becoming void in accordance with Section
         11(a)(ii) hereof) or any adjustment in the terms of the Rights
         (including the manner, method or amount thereof) provided for in
         Section 3, 11, 13, 23 or 24, or the ascertaining of the existence of
         facts that would require any such change or adjustment (except with
         respect to the exercise of Rights evidenced by Right Certificates
         after actual notice that such change or adjustment is required); nor
         shall it by any act hereunder be deemed to make any representation or
         warranty as to the authorization or reservation of any Preferred
         Shares to be issued pursuant to this Agreement or any Right
         Certificate or as to whether any Preferred Shares will, when 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 any one of the Chairman of the Board, the Chief
         Executive Officer, the President, any Vice President, the Secretary or
         the


                                      -46-

<PAGE>   50



         Treasurer of the Company, and to apply to such officers for advice or
         instructions in con nection with its duties, and it shall not be
         liable for any action taken or suffered by it in good faith in
         accordance with instructions of any such officer or for any delay in
         acting while waiting for those instructions. Any application by the
         Rights Agent for written instructions from the Company may, at the
         option of the Rights Agent, set forth in writing any action proposed
         to be taken or omitted by the Rights Agent under this Agreement and
         the date on and/or after which such action shall be taken or such
         omission shall be effective. The Rights Agent shall not be liable for
         any action taken by, or omission of, the Rights Agent in accordance
         with a proposal included in any such application on or after the date
         specified in such application (which date shall not be less than five
         Business Days after the date any officer of the Company actually
         receives such application, unless any such officer shall have
         consented in writing to an earlier date) unless, prior to taking any
         such action (or the effective date in the case of an omission), the
         Rights Agent shall have received written instructions in response to
         such application specifying the action to be taken or omitted.

                  (h)      The Rights Agent and 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 lead 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.

                  (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


                                      -47-

<PAGE>   51



         or agents, and the Rights Agent shall not be answerable or accountable
         for any act, default, neglect or misconduct of any such attorneys or
         agents or for any loss to the Company resulting from any such act,
         default, neglect or misconduct, provided reasonable care was exercised
         in the selection and continued employment thereof.

                  (j)      If, with respect to any Rights Certificate 
         surrendered to the Rights Agent for exercise or transfer, the
         certificate contained in the form of assignment or the form of
         election to purchase set forth on the reverse thereof, as the case may
         be, has not been completed to certify the holder is not an Acquiring
         Person (or an Affiliate or Associate 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 30 days' notice in writing mailed to the Company and to each transfer
agent of the Common Stock or Preferred Shares by registered 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 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 or Preferred Shares by
registered or certified mail, 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 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


                                      -48-

<PAGE>   52



such notice, submit his Right Certificate for inspection by the Company), then
the registered holder of any Right Certificate may apply to any court of
competent jurisdiction for the appointment of a new Rights Agent. Any successor
Rights Agent, whether appointed by the 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 an office in the State of State of
New York, which is authorized under such laws to exercise corporate trust or
stock transfer 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 $50 million. 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 or
Preferred Shares, and mail a notice thereof in writing to the registered
holders of the Right Certificates. Failure to give any notice provided for in
this Section 21, however, or any defect therein, shall not affect the legality
or validity of the resignation or removal of the Rights Agent or the
appointment of the successor Rights Agent, as the case may be.

         Section 22.  Issuance of New Right Certificates.  Notwithstanding any 
of the provisions of this Agreement or of the Rights to the contrary, the
Company may, at its option, issue new Right


                                      -49-

<PAGE>   53



Certificates evidencing Rights in such form as may be approved by its Board of
Directors to reflect any adjustment or change in the Purchase Price and the
number or kind or class of shares or other securities or property purchasable
under the Right Certificates made in accordance with the provisions of this
Agreement. In addition, in connection with the issuance or sale of Common Stock
following the Distribution Date and prior to the earlier of the Redemption Date
and the Final Expiration Date, the Company may with respect to shares of Common
Stock so issued or sold pursuant to (i) the exercise of stock options, (ii)
under any employee plan or arrangement, (iii) upon the exercise, conversion or
exchange of securities, notes or debentures issued by the Company or (iv) a
contractual obligation of the Company in each case existing prior to the
Distribution Date, issue Rights Certificates representing the appropriate
number of Rights in connection with such issuance or sale.

         Section 23.  Redemption. (a) The Board of Directors of the Company may,
at its option, at any time prior to 5:00 p.m., Houston, Texas time on the tenth
business day after the Stock Acquisition Date, redeem all but not less than all
the then outstanding Rights at a redemption price of $0.01 per Right,
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 redemption of the
Rights by the Board of Directors of the Company may be made effective at such
time, on such basis and with such conditions as the Board of Directors of the
Company, in its sole discretion may establish. The Company may, at its option,
pay the Redemption Price in cash, shares of Common Stock (based on the current
market price of the Common Stock at the time of redemption) or any other form
of consideration deemed appropriate by the Board of Directors.


                                      -50-

<PAGE>   54



         (b)     Immediately upon the action of the Board of Directors of the
Company ordering the redemption of the Rights pursuant to paragraph (a) of this
Section 23 (or at such later time as the Board of Directors may establish for
the effectiveness of such redemption), 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. The Company shall promptly give public notice of any such
redemption; provided, however, that the failure to give, or any defect in, any
such notice shall not affect the validity of such redemption. Within 10 days
after such action of the Board of Directors of the Company ordering the
redemption of the Rights, the Company shall mail a notice of redemption to all
the holders of the then outstanding Rights at their last addresses as they
appear upon the registry books of the Rights Agent or, prior to the
Distribution Date, on the registry books of the transfer agent for the Common
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 for value any Rights at any time in any manner
other than that specifically set forth in this Section 23 or in Section 24
hereof, and other than in connection with the purchase of Common Shares prior
to the Distribution Date.

         Section 24.  Exchange. (a) The Board of Directors of the Company may,
at its option, at any time after any Person first 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 11(a)(ii) hereof) for shares of Common Stock at an exchange ratio of
one share of Common Stock per Right, appropriately adjusted to reflect any
stock split, stock dividend or


                                      -51-

<PAGE>   55



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 of the Company shall not be empowered to
effect such exchange at any time after any Person (other than an Exempt
Person), together with all Affiliates and Associates of such Person, becomes
the Beneficial Owner of 50% or more of the Common Shares then outstanding. From
and after the occurrence of an event specified in Section 13(a) hereof, any
Rights that theretofore have not been exchanged pursuant to this Section 24(a)
shall thereafter be exercisable only in accordance with Section 13 and may not
be exchanged pursuant to this Section 24(a). The exchange of the Rights by the
Board of Directors may be made effective at such time, on such basis and with
such conditions as the Board of Directors in its sole discretion may establish.

         (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 24 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 Rights shall be to receive that number of shares of Common Stock equal
to the number of such Rights hold 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 promptly shall 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


                                      -52-

<PAGE>   56



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 11(a)(ii) hereof) held by each holder of Rights.

         (c)     In the event that there shall not be sufficient shares of 
Common Stock issued but not outstanding or authorized but unissued to permit
any exchange of Rights as contemplated in accordance with this Section 24, the
Company shall take all such action as may be necessary to authorize additional
shares of Common Stock for issuance upon exchange of the Rights. In the event
the Company shall, after good faith effort, be unable to take all such action
as may be necessary to authorize such additional Common Stock, the Company
shall substitute, for each share of Common Stock that would otherwise be
issuable upon exchange of a Right, a number of Preferred Shares or fraction
thereof such that the current per share market price of one Preferred Share
multiplied by such number or fraction is equal to the current per share market
price of one share of Common Stock as of the date of issuance of such Preferred
Shares or fraction thereof.

         (d)     The Company shall not be required to issue fractions of a share
of Common Stock or to distribute certificates which evidence fractional shares
of Common Stock. In lieu of such fractional shares of Common Stock, the Company
shall pay to the registered holders of the Right Certificates with regard to
which such shares of fractional Common Stock 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 Section 24(b), 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 the second sentence
of Section 11(d)(i) hereof) for the Trading Day immediately prior to the date
of exchange pursuant to this Section 24.


                                      -53-

<PAGE>   57



         Section 25.  Notice of Certain Events. (a) In case the Company shall at
any time after the earlier of the Distribution Date and the Stock Acquisition
Date propose (i) to pay any dividend payable in stock of any class to the
holders of its Preferred Shares or to make any other distribution to the
holders of its Preferred Shares (other than a regular quarterly cash dividend),
(ii) to offer to the holders of its Preferred Shares rights or warrants to
subscribe for or to purchase any additional preferred Shares or shares of stock
of any class or any other securities, rights or options, (iii) to effect any
reclassification of its Preferred Shares (other than a reclassification
involving only the subdivision or combination of outstanding Preferred Shares),
(iv) to effect any consolidation or merger with or into, or to effect any sale
or other transfer (or to permit one or more of its Subsidiaries to effect any
sale or other transfer), in one or more transactions, of 50% or more of the
assets or earning power of the Company and its Subsidiaries (taken as a whole)
to, any other Person, (v) to effect the liquidation, dissolution or winding up
of the Company, or (vi) to declare or pay any dividend on the Common Stock
payable in Common Stock or to effect a subdivision, combination or
consolidation of the Common Stock (by reclassification or otherwise than by
payment of dividends in Common Stock), then, in each such case, the Company
shall give to each holder of a Right Certificate, in accordance with Section 26
hereof, a notice of such proposed action, which shall specify the record date
for the purposes of such stock dividend, or distribution of rights or warrants,
or the date on which such reclassification. consolidation, merger, sale,
transfer, liquidation, dissolution, or winding up is to take place and the date
of participation therein by the holders of the Common Shares and/or Preferred
Shares, if any such date is to be fixed, and such notice shall be so given in
the case of any action covered by clause (i) or (ii) above at least 10 days
prior to the record date for determining holders of the Preferred Shares for
purposes of such action, and in the case of


                                      -54-

<PAGE>   58



any such other action, at least 10 days prior to the date of the taking of such
proposed action or the date of participation therein by the holders of the
Common Stock and/or Preferred Shares, whichever shall be the earlier.

         (b)     In case the event set forth in Section 11(a)(ii) or Section 13
hereof shall occur, then the Company shall as soon as practicable thereafter
give to each holder of a Right Certificate (or if occurring prior to the
Distribution Date, the holders of the Common Stock), in accordance with Section
26 hereof, a notice of the occurrence of such event, which notice shall
describe such event and the consequences of such event to holders of Rights
under Section 11(a)(ii) or Section 13 hereof, as the case may be.

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

                           Santa Fe Energy Resources, Inc.
                           1616 South Voss Road
                           Suite No. 1000
                           Houston, Texas   77057
                           Attention:  Corporate Secretary

Subject to the provisions of Section 21 hereof, 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:


                                      -55-

<PAGE>   59



                           First Chicago Trust Company of New York
                           Suite No. 4660
                           525 Washington Boulevard
                           Jersey City, New Jersey   07810
                           Attention:  Tenders: Exchanges Administration

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 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.

         Section 27.  Supplements and Amendments. Except as otherwise provided
in this Section 27, for so long as the Rights are then redeemable, the Company
may in its sole and absolute discretion, and the Rights Agent shall if the
Company so directs, supplement or amend any provision of this Agreement in any
respect without the approval of any holders of the Rights, including, without
limitation, so long as the Rights are then redeemable to extend the period
during which the Rights may be redeemed. At any time when the Rights are no
long redeemable, except as otherwise provided in this Section 27, the Company
may, and the Rights Agent shall, if the Company so directs, supplement or amend
this Agreement without the approval of any holders of Rights Certificates in
order to (i) cure any ambiguity, (ii) correct or supplement any provision
contained herein which may be defective or inconsistent with any other
provisions herein, (iii) shorten or lengthen any time period hereunder, or (iv)
change or supplement the provisions hereunder in any manner which the Company
may deem necessary or desirable; provided that no such supplement or amendment
shall adversely affect the interests of the holders of Rights as such (other
than an Acquiring Person or an Affiliate or Associate of an Acquiring Person),
and no such amendment may cause the rights again to become redeemable or cause
the Agreement again to become amendable


                                      -56-

<PAGE>   60



other than in accordance with this sentence. Notwithstanding anything contained
in this Agreement to the contrary, no supplement or amendment shall be made
which decreases the Redemption Price. 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 27, the Rights
Agent shall execute such supplement or amendment.

         Section 28.  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 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, 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, the Common
Stock).

         Section 30.  Determination and Actions by the Board of Directors. The
Board of Directors of the Company shall have the exclusive power and authority
to administer this Agreement and to exercise the rights and powers specifically
granted to the Board of Directors of the Company or to the Company, or as may
be necessary or advisable in the administration of this Agreement, including,
without limitation, the right and power to (i) interpret the provisions of this
Agreement and (ii) make all determinations deemed necessary or advisable for
the administration of this Agreement (including, without limitation, a
determination to redeem or not redeem the Rights or to amend this Agreement).
All such actions, calculations, interpretations and determinations


                                      -57-

<PAGE>   61



(including, for purposes of clause (y) below, all omissions with respect to the
foregoing) that are done or made by the Board of Directors of the Company in
good faith, shall (x) be final, conclusive and binding on the Company, the
Rights Agent, the holders of the Rights, as such, and all other parties, and
(y) not subject the Board of Directors to any liability to the holders of the
Rights.

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

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

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

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


                                      -58-

<PAGE>   62



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


                                         SANTA FE ENERGY RESOURCES, INC.
Attest:
By:      /s/ Mark A. Older               By:      /s/ David L. Hicks
    ---------------------------------        -----------------------------------
                                             Name:    David L. Hicks
                                             Title:   Vice President -- Law and
                                                       General Counsel


                                         FIRST CHICAGO TRUST COMPANY OF
                                          NEW YORK

Attest:
By:     /s/ James Kuzmich                By:    /s/ Gerard J. O'Leary
    ---------------------------------        -----------------------------------

                                            Name:   Gerard J. O'Leary
                                                 -------------------------------
                                            Title:  Vice President
                                                  ------------------------------



                                      -59-

<PAGE>   63



                                   Exhibit A

                          Form of Amended Certificate

                               of Designations of

                Series A Junior Participating Preferred Stock of

                        Santa Fe Energy Resources, Inc.

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


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


         Santa Fe Energy Resources, Inc., a corporation organized and existing
under the General Corporation Law of the State of Delaware (hereinafter called
the "Company"), hereby certifies that the following resolution was duly adopted
by the Board of Directors of the Company as required by Section 151 of the
General Corporation Law of the State of Delaware at a meeting duly called and
held on February 19, 1997:

         RESOLVED, that to the authority granted to and vested in the Board of
Directors of the Company (hereinafter called the "Board of Directors" or the
"Board") in accordance with the provisions of the Company's Certificate of
Incorporation, as amended to date (hereinafter called the "Certificate of
Incorporation"), the Board of Directors on February 19, 1997 adopted a
resolution creating a series of shares of Preferred Stock, par value $1.00 per
share, designated as Series A Participating Cumulative Preferred Stock and
filed such designation with the Secretary of State of Delaware on February 19,
1997, no shares of which have been issued as of March 3, 1997; and be it
further


                                      A-1

<PAGE>   64



         RESOLVED, that pursuant to the authority vested in the Board of
Directors of the Corporation in accordance with the provisions of the Delaware
General Corporation Law and the Certificate of Incorporation, the Series A
Participating Cumulative Preferred Stock of the Corporation heretofore created
be, and that the designation thereof and the powers, designations, preferences
and relative, participating, optional or other special rights of the shares of
such series, and the qualifications, limitations or restrictions thereof are
hereby amended and restated as follows:

         Section 1.  Designation and Amount. The shares of such series shall be
designated as "Series A Junior Participating Preferred Stock" (the "Series A
Preferred Stock") and the number of shares constituting the Series A Preferred
Stock shall be 2,000,000. 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 Series A Preferred Stock to a number less than
the number of shares then outstanding plus 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 Company convertible
into Series A Preferred Stock.

         Section 2.  Dividends and Distributions.

         (A)     Subject to the rights of the holders of any shares of any 
series of Preferred Stock of the Company (the "Preferred Stock") (or any
similar stock) ranking prior and superior to the Series A Preferred Stock with
respect to dividends, the holders of shares of Series A Preferred Stock, in
preference to the holders of Common Stock, par value $0.01 per share, of the
Company (the "Common Stock") and of any other stock of the Company ranking
junior to the Series A Preferred Stock, shall be entitled to receive, when, as
and if declared by the Board of Directors out of funds legally available
therefor, quarterly dividends payable in cash on the last day of January,
April, July,


                                      A-2

<PAGE>   65



and October in each year (each such date being referred to herein as a
"Dividend Payment Date"), commencing on the first Dividend Payment Date"),
commencing on the first Dividend Payment Date after the first issuance of a
share or fraction of a share of Series A Preferred Stock, in an amount per
share (rounded to the nearest cent) equal to the greater of (a) $1.00 and (b)
subject to the provision for adjustment hereinafter set forth, 100 times the
aggregate per share amount of all cash dividends, and 100 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, declared
on the Common Stock since the immediately preceding Dividend Payment Date or,
with respect to the first Dividend Payment Date, since the first issuance of
any share or fraction of a share of Series A Preferred Stock. In the event that
the Company shall at any time after March 3, 1997 declare or pay any dividend
on the Common Stock payable in shares of Common Stock, or effect a subdivision
or combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the amount to which holders of shares of Series A 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 Company shall declare a dividend or distribution on the 
Series A Preferred Stock as provided in paragraph (A) of this Section
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


                                      A-3

<PAGE>   66



period between any Dividend Payment Date and the next subsequent Dividend
Payment Date, a dividend of $1.00 per share on the Series A Preferred Stock
shall nevertheless be payable, when, as and if declared, on such subsequent
Dividend Payment Date.

         (C)     Dividends shall begin to accrue and be cumulative, whether or 
not earned or declared, on outstanding shares of Series A Preferred Stock from
the Dividend Payment Date next preceding the date of issue of such shares,
unless the date of issue of such shares is prior to the record date for the
first 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 Dividend Payment Date or is a date after the record date for the
determination of holders of shares of Series A Preferred Stock entitled to
receive a quarterly dividend and before such Dividend Payment Date, in either
of which events such dividends shall begin to accrue and be cumulative from
such Dividend Payment Date. Accrued but unpaid dividends shall not bear
interest. Dividends paid on the shares of Series A Preferred Stock in an amount
less than the total amount of such dividends at the time accrued and payable on
such shares shall be allocated pro rata on a share-by-share basis among all
such shares at the time outstanding. The Board of Directors may fix a record
date for the determination of holders of shares of Series A Preferred Stock
entitled to receive payment of a dividend or distribution declared thereon,
which record date shall be not more than 60 days prior to the date fixed for
the payment thereof.

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

         (A)     Subject to the provision for adjustment hereinafter set forth
except as otherwise provide in the Certificate of Incorporation or required by
law, each share of Series A Preferred Stock


                                      A-4

<PAGE>   67



shall entitle the holder thereof to 100 votes on all matters upon which the
holders of the Common Stock of the Company are entitled to vote. In the event
the Company shall at any time after March 3, 1997 declare or pay any dividend
on the Common Stock payable in shares of Common Stock, or effect a subdivision
or combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the number of votes per share to which holders of shares of Series A
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, in the Certificate of
Incorporation or in any other Certificate of Designations creating a series of
Preferred Stock or any similar stock, and except as otherwise required by law,
the holders of shares of Series A Preferred Stock and the holders of shares of
Common Stock and any other capital stock of the Company having general voting
rights shall vote together as one class on all matters submitted to a vote of
stockholders of the Company.

         (C)     Except as set forth herein, or as otherwise provided by law,
holders of Series A 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.


                                      A-5

<PAGE>   68



         Section 4.  Certain Restrictions.

         (A)     Whenever quarterly dividends or other dividends or 
distributions payable on the Series A Preferred Stock as provided in Section 2
are in arrears, thereafter and until all accrued and unpaid dividends and
distributions, whether or not earned or declared, on shares of Series A
Preferred Stock outstanding shall have been paid in full, the Company shall
not:

                  (i)      declare or pay dividends, or make any other 
         distributions, on any shares of stock ranking junior (as to dividends)
         to the Series A Preferred Stock;

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

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

                  (iv)     redeem or purchase or otherwise acquire for
         consideration any shares of Series A Preferred Stock, or any shares of
         stock ranking on a parity (either as to dividends or upon liquidation,
         dissolution or winding up) with the Series A Preferred Stock, except
         in accordance with a purchase offer made in writing or by publication
         (as determined by the


                                      A-6

<PAGE>   69



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

         Section 5.  Reacquired Shares. Any shares of Series A Preferred Stock
purchased or otherwise acquired by the Company in any manner whatsoever shall
be retired and cancelled promptly after the acquisition thereof. All such
shares shall upon their retirement 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 any conditions and restrictions on issuance set forth herein.

         Section 6.  Liquidation, Dissolution or Winding Up. Upon any
liquidation, dissolution or winding up of the Company, no distribution shall be
made (A) to the holders of the Common Stock or of shares of any other stock of
the Company ranking junior, upon liquidation, dissolution or winding up, to the
Series A Preferred Stock unless, prior thereto, the holders of shares of Series
A Preferred Stock shall have received $1.00 per share, plus an amount equal to
accrued and unpaid dividends distributions thereon, whether or not earned or
declared, to the date of such payment, provided that the holders of shares of
Series A Preferred Stock shall be entitled to receive an aggregate amount per
share, subject to the provision for adjustment hereinafter set forth, equal to
100


                                      A-7

<PAGE>   70



times the aggregate amount to be distributed per share to holders of shares of
Common Stock, or (B) to the holders of shares of stock ranking on a parity upon
liquidation, dissolution or winding up with the Series A Preferred Stock,
except distributions made ratably on the Series A Preferred Stock and all such
parity stock in proportion to the total amounts to which the holders of all
such shares are entitled upon such liquidation, dissolution or winding up. 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 classes and series of stock of the Company, if any,
that rank on a parity with the Series A Preferred Stock in respect thereof,
then the assets available for such distribution shall be distributed ratably to
the holders of the Series A Preferred Stock and the holders of such parity
shares in the proportion to their respective liquidation preferences. In the
event the Company shall at any time after March 3, 1997 declare or pay any
dividend on the Common Stock payable in shares of Common Stock, or effect a
subdivision or combination or consolidation of the outstanding shares of Common
Stock (by reclassification or otherwise than by payment of a dividend in shares
of Common Stock) into a greater or lesser number of shares of Common Stock,
then in each such case the aggregate amount to which holders of shares of
Series A Preferred Stock were entitled immediately prior to such event under
the proviso in clause (A) 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.

         Section 7.  Consolidation, Merger, etc. In the case the Company shall
enter into any consolidation, merger, combination or other transaction in which
the shares are converted into, exchanged for or changed into other stock or
securities, cash and/or any property, then in any such


                                      A-8

<PAGE>   71



case each share of Series A Preferred Stock shall at the same time be similarly
converted into, exchanged for or changed into an amount per share (subject to
the provision for adjustment hereinafter set forth) equal to 100 times
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 converted, exchanged or converted. In the event the Company shall at
any time after March 3, 1997 declare or pay any dividend on the Common Stock
payable in shares of Common Stock, or effect a subdivision or combination or
consolidation of the outstanding shares of Common Stock (by reclassification or
otherwise than by payment of a dividend in shares of Common Stock) into a
greater or lesser number of shares of Common Stock, then in each such case the
amount set forth in the preceding sentence with respect to the conversion,
exchange or change of shares of Series A 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 Series A Preferred Stock 
shall not be redeemable from any holder.

         Section 9.  Rank. The Series A Preferred Stock shall rank, with respect
to the payment of dividends and the distribution of assets upon liquidation,
dissolution or winding up of the Company, junior to all other series of
Preferred Stock and senior to the Common Stock.

         Section 10.  Amendment. If any proposed amendment to the Certificate of
Incorporation (including this Certificate of Designations) would alter, change
or repeal any of the preferences, powers or special rights given to the Series
A Preferred Stock so as to affect the Series A Preferred


                                      A-9

<PAGE>   72



Stock adversely, then the holders of the Series A Preferred Stock shall be
entitled to vote separately as a class upon such amendment, and the affirmative
vote of two-thirds of the outstanding shares of the Series A Preferred Stock,
voting separately as a class, shall be necessary for the adoption thereof, in
addition to such other vote as may be required by the General Corporation Law
of the State of Delaware.

         Section 11.  Fractional Shares. Series A Preferred Stock may be issued
in fractions of a share that 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 Series A Preferred Stock.

IN WITNESS WHEREOF, this Certificate of Designations is executed on behalf of
the Company by its of and attested by its Secretary this day of March, 1997.


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

Attest:

- ------------------------------
Secretary



                                      A-10

<PAGE>   73



                                   Exhibit B

                           Form of Right Certificate

Certificate No. R-                                                        Rights
                                                                ---------

         NOT EXERCISABLE AFTER _______, 2007 OR EARLIER IF REDEMPTION OR
         EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $0.01 PER
         RIGHT AND TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.



                        SANTA FE ENERGY RESOURCES, 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 March 3, 1997 (the "Rights Agreement"),
between Santa Fe Energy Resources, Inc., a Delaware corporation (the
"Company"), and First Chicago Trust Company of New York (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 P.M., Houston, Texas
time, on the earlier to occur of (i) March 3, 2000 and (ii) the Business Day
next following the record date established by the Company for the distribution
to the Company's stockholders of the shares of Common Stock of Monterey
Resources, Inc. owned by the Company, at the principal office of the Rights
Agent, or at the office of its successor as Rights Agent, one one-hundredth of
a fully paid non-assessable share of Series A Junior Participating Preferred
Stock, par value $1.00 per share, of the Company (the "Preferred Shares") at a
purchase price of $42.00 (subject to adjustment as provided in the Rights
Agreement) per one one-hundredth of a Preferred Share (the "Purchase Price"),
upon presentation and surrender of this Right Certificate


                                      B-1

<PAGE>   74



with the Form of Election to Purchase duly executed. The number of Rights
evidenced by this Right Certificate (and the number of one one-hundredths of a
Preferred Share which may be purchased upon exercise hereof) set forth above,
and the Purchase Price set forth above, are the number and Purchase Price as of
the earlier to occur of (i) March 3, 2000 and (ii) the Business Day next
following the record date established by the Company for the distribution to
the Company's stockholders of the shares of common stock of Monterey Resources,
Inc. owned by the Company, based on the Preferred Shares as constituted at such
date. As provided in the Rights Agreement, the Purchase Price and the number of
one one-hundredths of a Preferred Share 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.

         This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Right Certificates. Copies of
the Rights Agreement are on file at the principal executive offices of the
Company and the offices of the Rights Agent.

         This Right Certificate, with or without other Right Certificates, upon
surrender at the principal office of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor and date
evidencing Rights entitling the holder to purchase a like aggregate number of
Preferred Shares 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


                                      B-2

<PAGE>   75



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 Right Certificate (i) may be redeemed by the Company at a
redemption price of $0.01 per Right or (ii) may be exchanged in whole or in
part for Preferred Shares or shares of the Company's Common Stock, par value
$0.01 per share.

         No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions which are integral
multiples of one one-hundredth of a Preferred Share, 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.

         No holder of this Right Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the 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 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.


                                      B-3

<PAGE>   76



         WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal. Dated as of _____________, _______ .

                                                 SANTA FE ENERGY RESOURCES, INC.
                                                 
ATTEST:                                          
                                                 
                                                 By:
- ---------------------------                         ----------------------------
Name:                                               Name:
Title:                                              Title:
                                                 
                                                 
Countersigned:                                   FIRST CHICAGO TRUST COMPANY OF
                                                  NEW YORK
                                                 
                                                 
                                                 
                                                 By:
                                                    ----------------------------
                                                    Name:
                                                    Title:




                                      B-4

<PAGE>   77



                   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 onto

- --------------------------------------------------------------------------------
                 (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: ____________________, ______

                                           Signature
                                                     ---------------------------
         Signature Guaranteed:

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

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


         The undersigned hereby certifies that the Rights evidenced by this
Right Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).

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

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




                                      B-5

<PAGE>   78



             Form of Reverse Side of Right Certificate - continued

                          FORM OF ELECTION TO PURCHASE

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

To:      SANTA FE ENERGY RESOURCES, INC.

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

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 remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security
or other identifying number

                        (Please print name and address)


Dated: _____________, ___

                                  Signature

Signature Guaranteed:

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

            (FORM OF REVERSE SIDE OF RIGHT CERTIFICATE -- CONTINUED)

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

         The undersigned hereby certifies that the Rights evidenced by this
Right Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).


                                  Signature

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


                                      B-6

<PAGE>   79



                                     NOTICE

         The signature in the Form of Assignment or Form of Election to
Purchase, as the case may be, must conform to the name as written upon the face
of this Right Certificate in every particular, without alteration or
enlargement or any change whatsoever.

         In the event the certification act forth above in the Form of
Assignment or the Form of Election to Purchase, as the case may be, is not
completed, the Company and the Rights Agent will deem the beneficial owner of
the Rights evidenced by this Right Certificate to be an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement) and such
Assignment or Election to Purchase will not be honored.



                                      B-7

<PAGE>   80



                         SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES

         On February 19, 1997, the Board of Directors of Santa Fe Energy
Resources, Inc. (the "Company") declared a dividend of one preferred share
purchase right (a "Right") for each outstanding share of common stock, par
value $0.01 per share, of the Company (the "Common Stock"). The dividend is
payable on March 3, 1997 (the "Record Date") to the stockholders of record on
that date. Each Right entitles the registered holder to purchase from the
Company one one-hundredth of a share of Series A Junior Participating Preferred
Stock, par value $1.00 per share, of the Company (the "Preferred Shares") at a
price of $42.00 (subject to adjustment as provided in the Rights Agreement)
(the "Purchase Price"), subject to adjustment. The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement") between the
Company and First Chicago Trust Company of New York, as Rights Agent (the
"Rights Agent").

         Until the earlier to occur of (i) 10 business days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") have acquired beneficial ownership of 15% or more of the
outstanding Common Stock or (ii) 10 business days (or such later date as may be
determined by action of the Board of Directors of the Company prior to such
time as any person or group of affiliated persons becomes an Acquiring Person)
following the commencement of, or announcement of an intention to make, a
tender offer or exchange offer the consummation of which would result in the
beneficial ownership by a person or group of 15% or more of the outstanding
Common Stock (the earlier of such dates being the "Distribution Date"), the
Rights will be evidenced, with respect to any of the Common Stock certificates
outstanding as of the


                                     C - 1

<PAGE>   81



Record Date, by such Common Stock certificate with a copy of this Summary of
Rights attached thereto.

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

         The Rights are not exercisable until the Distribution Date. The Rights
will expire at 5:00 p.m., Houston, Texas time on the earlier to occur of (i)
March 3, 2000 and (ii) the close of business on the second anniversary of the
distribution to the Company's stockholders of the shares of Common Stock of
Monterey Resources, Inc. owned by the Company (the "Final Expiration Date"),
unless the Final Expiration Date is extended or unless the Rights are earlier
redeemed or exchanged by the Company, in each case, as described below.

         The Purchase Price payable, and the number of Preferred Shares or
other securities or property issuable, upon exercise of the Rights are subject
to adjustment from time to time to prevent


                                     C - 2

<PAGE>   82



dilution (i) in the event of a stock dividend on, or a subdivision, combination
or reclassification of, the Preferred Shares; (ii) upon the grant to holders of
the Preferred Shares of certain rights or warrants to subscribe for or purchase
Preferred Shares at a price, or securities convertible into Preferred Shares
with a conversion price, less than the then-current market price of the
Preferred Shares; or (iii) upon the distribution to holders of the Preferred
Shares of evidences of indebtedness or assets (excluding regular periodic cash
dividends paid out of earnings or retained earnings or dividend payable in
Preferred Shares) or of subscription rights or warrants (other than those
referred to above).

         The number of outstanding Rights and the number of one one-hundredths
of a Preferred Share issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Stock or a stock
dividend on the Common Stock payable in Common Stock or subdivisions,
consolidations or combinations of the Common Stock occurring, in any such case,
prior to the Distribution Date. If the Company shall pay any dividend or
distribution to the holders of its Common Stock consisting of evidences of
indebtedness or assets (excluding quarterly cash dividends) prior to the
Distribution Date, then the Purchase Price is also subject to adjustment.

         Preferred Shares purchasable upon exercise of the Rights will be
nonredeemable. Each Preferred Share will have a minimum preferential quarterly
dividend rate of $1.00 per share, but will be entitled to an aggregate dividend
of 100 times the dividend declared on the Common Stock. In the event of
liquidation, the holders of the Preferred Shares will receive a preferential
liquidation payment equal to the greater of $100 or 100 times the payment made
per share of Common Stock. Each Preferred Share will have 100 votes, voting
together with the Common Stock. Finally, in the event of any merger,
consolidation or other transaction in which Common Stock are exchanged, each


                                     C - 3

<PAGE>   83



Preferred Share will be entitled to receive 100 times the amount received per
share of Common Stock. These rights are protected by customary antidilution
provisions.

         Because of the nature of the Preferred Shares' dividend, liquidation
and voting rights, the value of one one-hundredth interest in a Preferred Share
purchasable upon exercise of each Right should approximate the value of one
share of Common Stock.

         In the event that the Company is acquired in a merger or other
business combination transaction or 50% or more of its consolidated assets or
earning power are sold after the first public announcement that a person or
group has become an Acquiring Person, proper provision will be made so that
each holder of a Right other than Rights beneficially owned by an Acquiring
Person (which will be void) will upon exercise have the right to receive, upon
the 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 will have a market value of two times the exercise price of
the Right. In the event that any person or group of affiliated or associated
persons becomes an Acquiring Person, proper provision shall be made so that
each holder of a Right, other than Rights beneficially owned by the Acquiring
Person (which will thereafter be void), will upon exercise have the right to
receive upon exercise that number of shares of Common Stock having a market
value of two times the exercise price of the Right.

         At any time after the first public announcement that any person or
group has become an Acquiring Person and prior to the acquisition by such
person or group of 50% or more of the outstanding Common Stock, the Board of
Directors of the Company may exchange the Rights (other than Rights owned by
such person or group which will have become void), in whole or in part, at an
exchange ratio of one share of Common Stock, or one one-hundredth of a
Preferred Share (or of


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<PAGE>   84



a share of a class or series of the Company's Preferred Shares having
equivalent rights, preferences and privileges), per Right (subject to
adjustment).

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

         At any time prior to the close of business on the 10th business day
after the public announcement that an Acquiring Person has become such, the
Board of Directors of the Company may redeem the Rights in whole, but not in
part, at a price of $0.01 per Right (the "Redemption Price"). The redemption of
the Rights may be made effective at such time on such basis with such
conditions as the Board of Directors in its sole discretion may establish.
Immediately upon any redemption of the Rights, the right to exercise the Rights
will terminate and the only right of the holders of Rights will be to receive
the Redemption Price.

         For so long as the Rights are then redeemable, the Company may in its
sole and absolute discretion amend the Rights Agreement without the consent of
the holders of the Rights, except that no amendment can be made to reduce the
Redemption price. At such time as the Rights have become non-redeemable, the
terms of the Rights may be amended by the Board of Directors of the Company
without the consent of the holders of the Rights, except that (i) no amendment
can be made to reduce the Redemption Price, (ii) no such amendment may
adversely affect the interest of the holders of the Rights and (iii) the
redemption right cannot be reinstated.


                                     C - 5

<PAGE>   85


         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.

         A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A dated
February 28, 1997. A copy of the Rights Agreement is available free of charge
from the Company. This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement,
which is hereby incorporated herein by reference.



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