Document:

EXHIBIT 10.20a

                                 FIRST AMENDMENT
                                       TO
                                CREDIT AGREEMENT
                            (364-DAY REVOLVING LOAN)

         THIS FIRST AMENDMENT TO CREDIT AGREEMENT (364-Day Revolving Loan)
("AMENDMENT AGREEMENT") is made December 19, 2000, to be effective as of the
Effective Date, by and among NATIONAL COOPERATIVE REFINERY ASSOCIATION, a
cooperative marketing association formed under the laws of the State of Kansas,
whose address is 1391 Iron Horse Road, P.O. Box 1404, McPherson, Kansas 67460
("BORROWER"), CoBank, ACB ("COBANK") for its own benefit as a Syndication Party
and as the Administrative Agent for the benefit of the present and future
Syndication Parties (in that capacity "ADMINISTRATIVE AGENT"), and Firstar Bank,
N.A., as successor by merger with Mercantile Bank (each a "SYNDICATION PARTY"
and collectively with CoBank, the "SYNDICATION PARTIES").

                                    RECITALS

         A. Borrower, Administrative Agent, the Syndication Parties, and Bank of
America, N.A. entered into a Credit Agreement (364-Day Revolving Loan) (as
amended "CREDIT AGREEMENT") dated as of December 21, 1999. The Credit Agreement
provided for a 364-Day Facility.

         B. CoBank, as Administrative Agent, gave written notification ("RENEWAL
NOTICE") to the Original Syndication Parties seeking (i) a renewal of their
respective Individual 364-Day Commitments, (ii) consent to an extension of the
364-Day Maturity Date, and (iii) certain other amendments to the Credit
Agreement, pursuant to the provisions of Section 14.8 of the Credit Agreement.

         C. All of the Original Syndication Parties, other than Bank of America,
N.A., have provided the Administrative Agent with written notice of their
agreement to make Individual 364-Day Commitments.

         D. The parties hereto desire to amend the Credit Agreement to renew the
364-Day Facility and to make certain other changes to the Credit Agreement as
hereinafter set forth.

         NOW, THEREFORE, for good and valuable consideration, the receipt of
which is hereby acknowledged, including the mutual promises and agreements
contained herein, the parties hereto hereby agree as follows:

1. DEFINITIONS. Capitalized terms used herein without definition shall have the
definition given to them in the Credit Agreement if defined therein.

<PAGE>

2. RENEWAL OF INDIVIDUAL 364-DAY COMMITMENTS. The Syndication Parties hereby
agree to renew or increase their respective Individual 364-Day Commitments in
the amounts set forth beneath their names and signatures on the signature pages
hereto and as set forth in Schedule 1 hereto.

3. AMENDMENTS TO CREDIT AGREEMENT. The parties hereto agree that the Credit
Agreement shall be amended as follows as of the Effective Date:

         3.1 A new Section 1.23A is added immediately after Section 1.23 reading
as follows:

                  1.23A COOPERATIVE DISSOLUTION: the transaction whereby all of
         the debts (other than minor debts not in excess of $1,000,000.00 in the
         aggregate and undistributed earnings) of Cooperative are satisfied, and
         the assets thereof are distributed to the members of Cooperative as
         required by Delaware law and the Organization Documents of Cooperative.

         3.2 Subsection 1.76 shall be amended in its entirety to read as
follows:

                  1.76 364-DAY MATURITY DATE: December 18, 2001.

         3.3 A new Section 2.10 is added reading as follows:

                  2.10 REDUCTION OF AGGREGATE 364-DAY COMMITMENT. Borrower may,
         by written facsimile notice to the Administrative Agent on or before
         10:00 A.M. (Eastern time) on any Banking Day, make a one time
         irrevocable reduction in the Aggregate 364-Day Commitment; provided
         that (a) such reduction must be in multiples of one-million dollars
         ($1,000,000.00), (b) such notice must not be sent unless and until
         Borrower has provided the Administrative Agent with a certificate of
         its Chief Financial Officer stating that the Cooperative Dissolution
         has occurred, and such notice must be sent no later than thirty (30)
         days after such certificate is provided to the Administrative Agent;
         and (c) Borrower must simultaneously make any principal payment
         necessary (along with any applicable Funding Losses on account of such
         principal payment) so that (i) the principal amount outstanding under
         the 364-Day Facility does not exceed the reduced Aggregate 364-Day
         Commitment on the date of such reduction, and (ii) the Individual
         Outstanding 364-Day Obligations owing to any Syndication Party do not
         exceed the Individual 364-Day Commitment of that Syndication Party
         (after reduction thereof in accordance with the following sentence). In
         the event the Aggregate 364-Day Commitment is reduced as provided in
         the preceding sentence, then the Individual 364-Day Commitment of each
         Syndication Party shall be reduced in the same proportion as the
         Individual 364-Day Commitment of such Syndication Party bears to the
         Aggregate 364-Day Commitment before such reduction.

         3.4 Section 4.1.2 is amended in its entirety to read as follows:

                  4.1.2 LIBO RATE OPTION. From time to time, and so long as no
         Event of Default has occurred and is continuing, at the request of
         Borrower included in a 364-Day Borrowing Notice, all or any part of the
         outstanding principal balance under the 364-Day Notes may bear interest
         at the LIBO Rate plus the LIBOR Margin (each a "LIBO RATE

                                       2
<PAGE>

         LOAN") except as provided in Subsection 3.4.4 hereof; provided that
         Borrower may have no more than ten (10) LIBO Rate Loans outstanding at
         any time. To effect this option, the Borrowing Notice must specify (a)
         the principal amount that is to bear interest at the LIBO Rate, which
         must be a minimum of $1,000,000.00 and in incremental multiples of
         $1,000,000.00, and (b) the period selected by Borrower during which the
         LIBO Rate is to be applied ("LIBO RATE PERIOD"), which may be any
         period of one, two, three, or six months, but must expire no later than
         (i) the 364-Day Maturity Date or (ii) with the unanimous consent of the
         Syndication Parties (including Voting Participants), on a date which is
         no later than thirty (30) days after the 364-Day Maturity Date. In
         addition, from time to time, and so long as no Event of Default has
         occurred and is continuing, Borrower may convert any Base Rate Loan to
         a LIBO Rate Loan, or continue a LIBO Rate Loan, by making a written
         request therefore ("LIBO REQUEST") to the Administrative Agent by
         facsimile, specifying (y) the principal amount that is to bear interest
         at the LIBO Rate, which must be a minimum of $1,000,000.00 and in
         incremental multiples of $1,000,000.00 and (z) the LIBO Rate Period
         selected by Borrower during which the LIBO Rate is to be applied. The
         Administrative Agent shall incur no liability in acting upon a request
         which it believed in good faith had been made by a properly authorized
         representative of Borrower. Following the expiration of the LIBO Rate
         Period for any LIBO Rate Loan, interest shall automatically accrue at
         the Base Rate unless Borrower requests and receives another LIBO Rate
         Loan as provided in this Subsection.

         3.5 Subsection 10.16.4 is amended in its entirety to read as follows:

                  10.16.4 MINIMUM WORKING CAPITAL. At all times Working Capital
         of not less than $60,000,000.00; provided that upon Borrower providing
         the Administrative Agent with a certificate of its Chief Financial
         Officer stating that the Cooperative Dissolution has occurred, Borrower
         shall thereafter be required to maintain Working Capital of not less
         than $20,000,000.00 at all times.

         3.6 Section 10.18 is deleted.

         3.7 Section 11.4 is amended by deletion of the word "and" before clause
(c), insertion of the word "and" after clause (c), and the addition of a new
clause (d) reading as follows:

         (d) in connection with the dissolution of Cooperative.

         3.8 Section 15.14 is amended by adding the following language at the
end of such Section:

         All Notes executed pursuant to this Section shall be dated as of the
         December 21, 1999. The Syndication Parties shall, as soon as practical
         after receipt of such new executed Notes, return to Borrower the Note,
         if any, which has been replaced by such new Note or Notes.

         3.9 Schedule 1 is replaced in its entirety by the Schedule 1 attached
hereto.

4. BORROWER'S REPRESENTATIONS. Borrower hereby represents and warrants that,
after giving effect to this Amendment Agreement and the transactions
contemplated hereby, no Potential Default or Event of Default has occurred and
is continuing under the Credit Agreement or other Loan Documents.

                                       3
<PAGE>

5. EFFECTIVE DATE. This Amendment Agreement shall become effective on December
19, 2000 ("EFFECTIVE Date"), so long as on or before that date the
Administrative Agent receives the Extension Fee and reimbursement of costs and
expenses in accordance with Section 6.2 hereof (to the extent invoiced to
Borrower on or before such date) an original copy of (a) this Amendment
Agreement (or original counterparts thereof) duly executed by each party hereto,
(b) each required new or replacement Promissory Note, and (c) a certificate
signed by the corporate Secretary of Borrower certifying as to (i) Borrower's
current Articles of Incorporation, (ii) Borrower's current By Laws, and (iii) a
resolution of Borrower's Board of Directors authorizing the amendments to the
Credit Agreement reflected in this Amendment Agreement and authorizing the
designated officer or officers of Borrower to execute this Amendment Agreement
and any other documents reasonably required by the Administrative Agent. Upon
the satisfaction of all conditions precedent hereto, the Administrative Agent
will notify each party hereto in writing and will provide copies of all
appropriate documentation in connection herewith.

6. FEES; COSTS; EXPENSES AND TAXES.

         6.1 Borrower agrees to pay a fee ("EXTENSION FEE") to the
Administrative Agent for the pro rata benefit of the Syndication Parties, in the
amount of $75,000.00.

         6.2 Borrower agrees to reimburse the Administrative Agent on demand for
all out-of-pocket costs, expenses and charges (including, without limitation,
all fees and charges of external legal counsel for the Administrative Agent)
incurred by the Administrative Agent in connection with the preparation,
reproduction, execution and delivery of this Amendment Agreement and any other
instruments and documents to be delivered hereunder.

7. GENERAL PROVISIONS.

         7.1 Borrower agrees to execute such additional documents as the
Administrative Agent may require, including, without limitation, new and/or
replacement Notes, to carry out or evidence the purposes of this Amendment
Agreement.

         7.2 The execution, delivery and effectiveness of this Amendment
Agreement shall not operate as a waiver of any right, power or remedy of the
Administrative Agent or any Syndication Party under any of the Loan Documents,
nor constitute a waiver of any provision of any of the Loan Documents, and the
Credit Agreement, as expressly modified hereby, and each of the other Loan
Documents, are hereby ratified and confirmed and shall continue in full force
and effect and be binding upon the parties thereto. Any direct or indirect
reference in the Loan Documents to the "Credit Agreement" shall be deemed to be
a reference to the Credit Agreement as amended by this Amendment Agreement. Any
direct or indirect reference in the Loan Documents to a "Syndication Party" or
to the "Syndication Parties" shall be deemed to be a reference to the
Syndication Parties which executed this Amendment Agreement.

8. GOVERNING LAW. This Amendment Agreement shall be governed by and construed in
accordance with the laws of the State of Colorado.

                                       4
<PAGE>

9. COUNTERPARTS. This Amendment Agreement may be executed in any number of
counterparts and by different parties to this Amendment Agreement in separate
counterparts, each of which when so executed shall be deemed to be an original
and all of which taken together shall constitute one and the same agreement.
Telefax copies of documents or signature pages bearing original signatures, and
executed documents or signature pages delivered by telefax, shall, in each such
instance, be deemed to be, and shall constitute and be treated as, an original
signed document or counterpart, as applicable.

         IN WITNESS WHEREOF, the parties hereto have caused this First Amendment
to Credit Agreement (364-Day Revolving Loan) to be executed by their duly
authorized officers as of the Effective Date.

                                        BORROWER:

                                        NATIONAL COOPERATIVE REFINERY
                                        ASSOCIATION, a cooperative marketing
                                        association formed under the laws of the
                                        State of Kansas

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

                                        ADMINISTRATIVE AGENT:

                                        COBANK, ACB

                                        By:
                                            ----------------------------------
                                        Name: Casey Garten
                                        Title: Vice President

                                       5
<PAGE>

                                      SYNDICATION PARTIES:

                                        COBANK, ACB

                                        By:
                                            ----------------------------------
                                        Name:  Casey Garten
                                        Title: Vice President

                                        Contact Name: Casey Garten
                                        Title: Vice President
                                        Address:  5500 S. Quebec Street
                                                  Englewood, CO 80127
                                        Phone No.: (303) 740-4354
                                        Fax No.: (303) 694-5830
                                        Payment Instructions:
                                              CoBank, ACB
                                              ABA No.: 307088754
                                              Acct. Name: NCRA
                                              Account No.: ______________
                                              Reference: NCRA

                                       6
<PAGE>

                                      SYNDICATION PARTIES:

                                        Firstar Bank, N.A.

                                        By:
                                            ----------------------------------
                                        Name:  Barry P. Sullivan
                                        Title: Vice President

                                        Contact Name: Barry P. Sullivan
                                        Title: Vice President
                                        Address:  1101 Walnut Street
                                                  Kansas City, Missouri  64106
                                        Phone No.: 816/871-2192
                                        Fax No.: 816/271-2226
                                        Payment Instructions:
                                              First Bank of Kansas City
                                              ABA No.: 081000210
                                              Acct. Name: National Cooperative
                                                          Refinery Assoc.
                                              Account No.: 9012016904
                                              Attn: Commercial Exceptions

                                       7<PAGE>

                                                                     EXHIBIT 4.4

                                RIGHTS AGREEMENT

                                 AMENDMENT NO. 3

     This Amendment No. 3, dated as of November 8, 2001 (the "Amendment") amends
the Rights Agreement, dated as of February 7, 1992, as amended by amendments
dated as of May 13, 1999 and November 4, 1999 (the "Rights Agreement"), by and
between Mattel, Inc., a Delaware corporation (the "Company") and Fleet National
Bank, a national banking association, formerly BankBoston N.A., formerly The
First National Bank of Boston (the "Rights Agent").

     WHEREAS, the Board of Directors of the Company has determined that it is in
the best interest of the Company and its stockholders to effect certain
amendments to the Rights Agreement;

     WHEREAS, pursuant to Section 27 of the Rights Agreement the Company may,
subject to certain limitations, amend the Rights Agreement without the approval
of any holders of Rights Certificates to make any provisions with respect to the
Rights which the Company deems necessary or desirable;

     WHEREAS, the Company and the Rights Agent wish to amend the Rights
Agreement in the manner set forth below.

     NOW, THEREFORE, in consideration of the foregoing and the mutual agreements
set forth herein, the parties thereto agree that the Rights Agreement is amended
as follows:

     1.  Amendment.
         ---------

         (a) All capitalized terms used herein, unless otherwise defined herein,
shall have the meanings given them in the Rights Agreement, and each reference
in the Rights Agreement to "this Agreement," "hereof," "herein," "hereunder" or
"hereby" and each other similar reference shall be deemed to refer to the Rights
Agreement as amended hereby. All references to the Rights Agreement in any other
agreement between or among any of the parties hereto relating to the
transactions contemplated by the Rights Agreement shall be deemed to refer to
the Rights Agreement s amended hereby.

         (b) Section 21 of the Rights Agreement ("Change of Rights Agent") is
hereby amended, effective as of May 8, 2001, by replacing it in its entirety
with the following:

     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 Shares or Preference 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
     Shares or

                                       1

<PAGE>

     Preference 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 such notice, submit
     such holder's 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 either (1) EquiServe Trust Company, N.A., or (2) a
     corporation or trust company organized and doing business under the laws of
     the United States or the Commonwealth of Massachusetts or the State of
     California (or of any other state of the United States so long as such
     corporation or trust company is authorized to do business as a banking
     institution in the Commonwealth of Massachusetts or the State of
     California), in good standing, having an office in the Commonwealth of
     Massachusetts or the State of California, 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 Shares or
     Preference 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.

         (c) Section 26 of the Rights Agreement ("Notices") is hereby amended,
effective as of the date of this Amendment, by replacing the address for any
notice or demand authorized by the Rights Agreement to be given or made by the
Company or the holder of any Right Certificate to or on the Rights Agent with
the following:

     Fleet National Bank
     c/o EquiServe Limited Partnership
     150 Royall Street
     Canton, MA  02021

         (d) Exhibit C to the Rights Agreement is hereby amended and restated
in its entirety, effective as of the date of this Amendment, as set forth in
Exhibit C attached hereto.

                                       2

<PAGE>

     2.  Miscellaneous.
         -------------

         (a) Choice of Law. This Amendment shall be deemed to be a contract
             -------------
made under the laws of the State of Delaware and for all purposes shall be
governed and construed in accordance with the laws of such State applicable to
contracts to be made and performed entirely within such State.

         (b) Counterparts. This Amendment may be executed in one or more
             ------------
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one and the same instrument.

         (c) Severability. If any term or provision of this Amendment is held
             ------------
by a court of competent jurisdiction or other authority to be invalid, void or
unenforceable, the remainder of the terms and provisions of this Amendment shall
in no way be affected, impaired or invalidated.

         (d) Existing Terms. The existing terms and conditions of the Rights
             --------------
Agreement shall remain in full force and effect except as such terms and
conditions are specifically amended or conflict with the terms of this
Amendment.

                                       3

<PAGE>

     IN WITNESS WHEREOF, this Amendment has been duly executed by the
respective authorized officers of the parties hereto, in each case as of the day
and year first above written.

                            The Company:
                            MATTEL, INC.

                            By:          /s/ Robert Normile
                               -------------------------------------------
                            Name:        Robert Normile
                            Title:       Senior Vice President,
                                         General Counsel and Secretary

                            Rights Agent:
                            FLEET NATIONAL BANK

                            By:          /s/ Katherine Anderson
                               -------------------------------------------
                            Name:        Katherine Anderson
                            Title:       Managing Director

                                       4

<PAGE>

                                                                       Exhibit C

                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERENCE SHARES

     On February 7, 1992, the Board of Directors of Mattel, Inc. (the "Company")
declared a dividend of one preference share purchase right (a "Right") for each
outstanding share of common stock, par value $1.00 per share (the "Common
Shares"), of the Company. The dividend is payable on February 17, 1992 (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 E Junior Participating Preference Stock, par value $.01 per share (the
"Preference Shares"), of the Company at a price of $150 per one one-hundredth of
a Preference Share (the "Purchase Price"), subject to adjustment. The
description and terms of the Rights are set forth in a Rights Agreement dated as
of February 7, 1992, as amended by Amendment No. 1 to the Rights Agreement dated
as of May 13, 1999, Amendment No. 2 to the Rights Agreement dated as of November
4, 1999 and Amendment No. 3 to the Rights Agreement dated as of November 8, 2001
(collectively, the "Rights Agreement") between the Company and Fleet National
Bank, a national banking association, formerly Bank Boston N.A., formerly The
First National Bank of Boston, as Rights Agent (the "Rights Agent").

     Until the earlier to occur of (i) 10 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 Shares (including any Common Shares that are issuable upon the exchange
of the exchangeable non-voting shares (the "Exchangeable Shares") of Softkey
Software Products Inc., the Company's Canadian subsidiary) or (ii) 10 business
days (or such later date as may be determined by action of the Board of
Directors 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 Shares (including any Common Shares that are issuable
upon the exchange of the Exchangeable Shares) (the earlier of such dates being
called the "Distribution Date"), the Rights will be evidenced, with respect to
any of the Common Share certificates outstanding as of the Record Date, by such
Common Share 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 Shares. Until the Distribution Date (or earlier redemption
or expiration of the Rights), new Common Share certificates issued after the
Record Date upon transfer or new issuance of Common Shares will contain a
notation incorporating the Rights Agreement by reference. Until the Distribution
Date (or earlier redemption or expiration of the Rights), the surrender for
transfer of any certificates for Common Shares outstanding as of the Record
Date, even without such notation or a copy of this Summary of Rights being
attached thereto, will also constitute the transfer of the Rights associated
with the Common Shares represented by such certificate. As soon as practicable
following the Distribution Date, separate certificates evidencing the Rights
("Right Certificates") will be mailed to holders of record of the Common Shares
as of the close of business on the Distribution Date and such separate Right
Certificates alone will evidence the Rights.

                                       5

<PAGE>

     The Rights are not exercisable until the Distribution Date. The Rights will
expire on February 17, 2002 (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 Preference Shares or other
securities or property issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the
Preference Shares, (ii) upon the grant to holders of the Preference Shares of
certain rights or warrants to subscribe for or purchase Preference Shares at a
price, or securities convertible into Preference Shares with a conversion price,
less than the then-current market price of the Preference Shares or (iii) upon
the distribution to holders of the Preference Shares of evidences of
indebtedness or assets (excluding regular periodic cash dividends paid out of
earnings or retained earnings or dividends payable in Preference 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
Preference Share issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Shares or a stock
dividend on the Common Shares payable in Common Shares or subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case
prior to the Distribution Date.

     Preference Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preference Share will be entitled to a minimum preferential
quarterly dividend payment of $1 per share but will be entitled to an aggregate
dividend of 100 times the dividend declared per Common Share. In the event of
liquidation, the holders of the Preference Shares will be entitled to a minimum
preferential liquidation payment of $100 per share but will be entitled to an
aggregate payment of 100 times the payment made per Common Share. Each
Preference Share will have 100 votes, voting together with the Common Shares.
Finally, in the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preference Share will be entitled to receive
100 times the amount received per Common Share. These rights are protected by
customary antidilution provisions.

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

     In the event that, after a person or group has become an Acquiring Person,
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, proper
provision will be made so that each holder of a Right will thereafter 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 thereafter have

                                       6

<PAGE>

the right to receive upon exercise that number of Common Shares 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
Common Shares (including any Common Shares that are issuable upon the exchange
of the Exchangeable Shares), 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 Common Share, or
one one-hundredth of a Preference Share (or of a share of a class or series of
the Company's preference 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 Preference Shares will be issued (other than
fractions which are integral multiples of one one-hundredth of a Preference
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 Preference Shares on the last trading day prior to the date
of exercise.

     At any time prior to the time an Acquiring Person becomes such, the Board
of Directors of the Company may redeem the Rights in whole, but not in part, at
a price of $.01 per Right (the "Redemption Price"). The redemption of the Rights
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. 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.

     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, including an amendment
to lower certain thresholds described above to not less than the greater of (i)
the sum of .001% and the largest percentage of the outstanding Common Shares
(including any Common Shares that are issuable upon the exchange of the
Exchangeable Shares) then known to the Company to be beneficially owned by any
person or group of affiliated or associated persons (other than (a) the Company,
(b) any subsidiary of the Company, (c) any employee benefit plan of the Company
or any subsidiary of the Company, (d) any entity holding Common Shares or
Exchangeable Shares for or pursuant to the terms of any such plan or (e) E.M.
Warburg, Pincus & Co., Inc., a Delaware corporation, and its affiliates and
associates) and (ii) 10%, except that from and after such time as any person or
group of affiliated or associated persons becomes an Acquiring Person no such
amendment may adversely affect the interests of the holders of the Rights.

     For the purpose of calculating the various percentage ownership thresholds
contained in the Rights Agreement, shares issued in connection with the capital
investment approved by the Company's shareholders at the 1984 Annual Meeting and
still owned by the original owner, or owned by certain qualified transferees,
are excluded from the amount deemed to be beneficially owned by such persons.
However, if such original owner or qualified transferee becomes a member of a
group with certain other persons, such shares will be included in the amount
attributable to, and will be deemed to be beneficially owned by, such other
persons.

                                       7

<PAGE>

     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 10, 1992. Copies of Amendments No. 1, No. 2 and No. 3 to the Rights
Agreement have been filed with the Securities and Exchange Commission as
Exhibits to a Registration Statement on Form 8-A/A dated May 13, 1999, November
12, 1999 and November 16, 2001, respectively. A copy of the Rights Agreement
(including Amendments No. 1, No. 2 and No. 3 to 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.

                                       8

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