Document:

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                                   EXHIBIT 4.3

                       FIRST AMENDMENT TO BROOKTROUT, INC.
              SECOND AMENDED AND RESTATED 1992 STOCK PURCHASE PLAN

         This First Amendment (the "First Amendment") to the Brooktrout, Inc.
(the "Company") Second Amended and Restated 1992 Stock Purchase Plan, dated as
of January 1, 2001 (the "Purchase Plan"), was adopted by the Board of Directors
(the "Board") of the Company on March 28, 2001.

         WHEREAS, the Board approved and adopted, subject to stockholder
approval, the amendment to increase by two hundred thousand (200,000) the
maximum number of shares of common stock, $.01 par value per share, reserved and
available for issuance under the Purchase Plan, from two hundred and
eighty-seven thousand five hundred (287,500) to four hundred and eighty-seven
thousand five hundred (487,500);

         NOW, THEREFORE, the Purchase Plan is hereby amended in the following
manner: The second sentence of the first paragraph is amended to increase the
number of shares of Stock reserved and available for purchase under the Purchase
Plan from two hundred and eighty-seven thousand five hundred (287,500) to four
hundred and eighty-seven thousand five hundred (487,500).<PAGE>

                                   EXHIBIT 4.6

                      SECOND AMENDMENT TO BROOKTROUT, INC.
                            1999 STOCK INCENTIVE PLAN

         This Second Amendment (the "Second Amendment") to the Brooktrout, Inc.
("Brooktrout" or the "Company") 1999 Stock Incentive Plan, dated December 8,
1999 (the "Plan"), was adopted by the Board of Directors (the "Board") of the
Company on October 9, 2001.

         WHEREAS, the Board believes that the availability of an adequate number
of shares of common stock, $.01 par value per share (the "Stock"), under the
Plan has been, and in the future will be, an important factor in attracting and
retaining the highest caliber employees of the Company;

         WHEREAS, the Board further believes that the number of shares of Stock,
available for issuance under the Plan is currently insufficient; and

         WHEREAS, the Board adopted an increase of four hundred thousand
(400,000) shares of Stock available for issuance under the Plan;

         NOW, THEREFORE, the Plan is hereby amended in the following manner: The
first sentence of Section 3 clause (a) is amended to increase the maximum number
of shares of Stock reserved and available for issuance under the Plan from nine
hundred thousand (900,000) to one million three hundred thousand (1,300,000).<PAGE>

                                                                     Exhibit 4.5

                                   DYNEGY INC.
                               2001 NON-EXECUTIVE
                              STOCK INCENTIVE PLAN

                                   I. PURPOSE

      The purpose of the DYNEGY INC. 2001 NON-EXECUTIVE STOCK INCENTIVE PLAN
(the "Plan") is to provide a means through which DYNEGY INC., an Illinois
corporation (the "Company"), and its Affiliates may attract able persons to
enter the employ of the Company and its Affiliates and to provide a means
whereby those individuals whose present and potential contributions to the
Company and its Affiliates are of importance can acquire and maintain stock
ownership, thereby strengthening their concern for the welfare of the Company
and its Affiliates. A further purpose of the Plan is to provide such individuals
with additional incentive and reward opportunities designed to enhance the
profitable growth of the Company and its Affiliates. Accordingly, the Plan
provides for granting Options, Restricted Stock Awards, or any combination
thereof, as is best suited to the circumstances of the particular employee as
provided herein.

                                II. DEFINITIONS

      The following definitions shall be applicable throughout the Plan unless
specifically modified by any paragraph:

            "AFFILIATE" means any corporation, partnership, limited liability
company or partnership, association, trust or other organization which, directly
or indirectly, controls, is controlled by, or is under common control with, the
Company. For purposes of the preceding sentence, "control" (including, with
correlative meanings, the terms "controlled by" and "under common control
with"), as used with respect to any entity or organization, shall mean the
possession, directly or indirectly, of the power (i) to vote more than 50% of
the securities having ordinary voting power for the election of directors of the
controlled entity or organization, or (ii) to direct or cause the direction of
the management and policies of the controlled entity or organization, whether
through the ownership of voting securities or by contract or otherwise.

            "AWARD" means, individually or collectively, any Option or
Restricted Stock Award.

            "BOARD" means the Board of Directors of the Company.

            "CODE" means the Internal Revenue Code of 1986, as amended.
Reference in the Plan to any section of the Code shall be deemed to include any
amendments or successor provisions to such section and any regulations under
such section.

            "COMMITTEE" means a committee of the Board that is selected by the
Board as provided in Paragraph IV(a).

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            "COMMON STOCK" means the Class A common stock, no par value per
share, of the Company, or any security into which such common stock may be
changed by reason of any transaction or event of the type described in Paragraph
IX.

            "COMPANY" means Dynegy Inc., an Illinois corporation.

            "CORPORATE CHANGE" shall have the meaning assigned to such term in
Paragraph IX(c) of the Plan.

            "DIRECTOR" means an individual elected to the Board by the
stockholders of the Company or by the Board under applicable corporate law who
is serving on the Board on the date the Plan is adopted by the Board or is
elected to the Board after such date.

            An "EMPLOYEE" means any person in an employment relationship with
the Company or any Affiliate.

            "FAIR MARKET VALUE" means, as of any specified date, the closing
sales price of the Common Stock reported on the stock exchange composite tape on
that date, or, if no prices are reported on that date, on the last preceding
date on which such prices of the Common Stock are so reported. In the event
Common Stock is not publicly traded at the time a determination of its value is
required to be made hereunder, the determination of its fair market value shall
be made by the Committee in such manner as it deems appropriate.

            "1934 ACT" means the Securities Exchange Act of 1934, as amended.

            "OPTION" means an Award granted under Paragraph VII of the Plan.

            "OPTION AGREEMENT" means a written agreement between the Company and
a Participant with respect to an Option.

            "PARTICIPANT" means an employee who has been granted an Award.

            "PLAN" means the Dynegy Inc. 2001 Non-Executive Stock Incentive
Plan, as amended from time to time.

            "RESTRICTED STOCK AGREEMENT" means a written agreement between the
Company and a Participant with respect to a Restricted Stock Award.

            "RESTRICTED STOCK AWARD" means an Award granted under Paragraph VIII
of the Plan.

            "STOCK APPRECIATION RIGHT" shall have the meaning assigned to such
term in Paragraph VII(d) of the Plan.

                  III. EFFECTIVE DATE AND DURATION OF THE PLAN

      The Plan shall become effective upon the date of its adoption by the
Board. No further Awards may be granted under the Plan after 10 years from the
date the Plan is adopted by the

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Board. The Plan shall remain in effect until all Options granted under the Plan
have been satisfied or expired, and all Restricted Stock Awards granted under
the Plan have vested or been forfeited.

                               IV. ADMINISTRATION

      COMPOSITION OF COMMITTEE. The Plan shall be administered by a committee
of, and appointed by, the Board that shall be comprised solely of two or more
"Non-Employee Directors" (as such term is defined in Securities and Exchange
Commission Rule 16b-3 promulgated under the 1934 Act, as such may be amended
from time to time, and any successor rule, regulation or statute fulfilling the
same or a similar function).

            POWERS. Subject to the express provisions of the Plan, the Committee
shall have authority, in its discretion, to determine which employees shall
receive an Award, the time or times when such Award shall be made, and the
number of shares to be subject to each Option or Restricted Stock Award. In
making such determinations, the Committee shall take into account the nature of
the services rendered by the respective employees, their present and potential
contribution to the Company's success and such other factors as the Committee in
its discretion shall deem relevant.

            ADDITIONAL POWERS. The Committee shall have such additional powers
as are delegated to it by the other provisions of the Plan. Subject to the
express provisions of the Plan, this shall include the power to construe the
Plan and the respective agreements executed hereunder, to prescribe rules and
regulations relating to the Plan, and to determine the terms, restrictions and
provisions of the agreement relating to each Award, and to make all other
determinations necessary or advisable for administering the Plan. The Committee
may correct any defect or supply any omission or reconcile any inconsistency in
the Plan or in any agreement relating to an Award in the manner and to the
extent it shall deem expedient to carry it into effect. The determinations of
the Committee on the matters referred to in this Paragraph IV shall be
conclusive.

                         V. SHARES SUBJECT TO THE PLAN;
                                 GRANT OF AWARDS

      SHARES SUBJECT TO THE PLAN. Subject to adjustment in the same manner as
provided in Paragraph IX with respect to shares of Common Stock subject to
Options then outstanding, the aggregate number of shares of Common Stock that
may be issued under the Plan shall not exceed 10,000,000 shares. Shares shall be
deemed to have been issued under the Plan only (i) to the extent actually issued
and delivered pursuant to an Award or (ii) to the extent an Award is settled in
cash. To the extent that an Award lapses or the rights of its holder terminate,
any shares of Common Stock subject to such Award shall again be available for
the grant of an Award under the Plan.

            GRANT OF AWARDS. The Committee may from time to time grant Awards to
one or more employees determined by it to be eligible for participation in the
Plan in accordance with the terms of the Plan.

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            STOCK OFFERED. Subject to the limitations set forth in Paragraph
V(a), the stock to be offered pursuant to the grant of an Award may be
authorized but unissued Common Stock or Common Stock previously issued and
outstanding and reacquired by the Company. Any of such shares which remain
unissued and which are not subject to outstanding Awards at the termination of
the Plan shall cease to be subject to the Plan but, until termination of the
Plan, the Company shall at all times make available a sufficient number of
shares to meet the requirements of the Plan.

                                VI. ELIGIBILITY

      Awards may be granted only to persons who, at the time of grant, are
employees; provided, however, that persons who, at the time of grant, are
employees who are subject to Section 16 of the 1934 Act (including any successor
section to the same or similar effect) or Directors shall not be eligible to
receive Awards under the Plan. An Award may be granted on more than one occasion
to the same person, and, subject to the limitations set forth in the Plan, such
Award may include an Option, a Restricted Stock Award, or any combination
thereof.

                               VII. STOCK OPTIONS

            OPTION PERIOD. The term of each Option shall be as specified by the
Committee at the date of grant.

            LIMITATIONS ON EXERCISE OF OPTION. An Option shall be exercisable in
whole or in such installments and at such times as determined by the Committee.

            NO INCENTIVE STOCK OPTIONS. Options granted under the Plan shall not
constitute incentive stock options within the meaning of section 422 of the
Code.

            OPTION AGREEMENT. Each Option shall be evidenced by an Option
Agreement in such form and containing such provisions not inconsistent with the
provisions of the Plan as the Committee from time to time shall approve. Each
Option Agreement shall specify the effect of termination of employment on the
exercisability of the Option. An Option Agreement may provide for the payment of
the option price, in whole or in part, by the delivery of a number of shares of
Common Stock (plus cash if necessary) having a Fair Market Value equal to such
option price. Moreover, an Option Agreement may provide for a "cashless
exercise" of the Option by establishing procedures satisfactory to the Committee
with respect thereto. Further, an Option Agreement may provide for the surrender
of the right to purchase shares under the Option in return for a payment in cash
or shares of Common Stock or a combination of cash and shares of Common Stock
equal in value to the excess of the Fair Market Value of the shares with respect
to which the right to purchase is surrendered over the option price therefor
("Stock Appreciation Rights"), on such terms and conditions as the Committee in
its sole discretion may prescribe. The terms and conditions of the respective
Option Agreements need not be identical. Subject to the consent of the
Participant, the Committee may, in its sole discretion, amend an outstanding
Option Agreement from time to time in any manner that is not inconsistent with
the provisions of the Plan (including, without limitation, an amendment that
accelerates the time at which the Option, or a portion thereof, may be
exercisable).

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            OPTION PRICE AND PAYMENT. The price at which a share of Common Stock
may be purchased upon exercise of an Option shall be determined by the Committee
but, subject to adjustment as provided in Paragraph IX, such purchase price
shall not be less than the Fair Market Value of a share of Common Stock on the
date such Option is granted. The Option or portion thereof may be exercised by
delivery of an irrevocable notice of exercise to the Company, as specified by
the Committee. The purchase price of the Option or portion thereof shall be paid
in full in the manner prescribed by the Committee.

            STOCKHOLDER RIGHTS AND PRIVILEGES. The Participant shall be entitled
to all the privileges and rights of a stockholder only with respect to such
shares of Common Stock as have been purchased under the Option and for which
certificates of stock have been registered in the Participant's name.

            OPTIONS AND RIGHTS IN SUBSTITUTION FOR OPTIONS GRANTED BY OTHER
EMPLOYERS. Options and Stock Appreciation Rights may be granted under the Plan
from time to time in substitution for options held by individuals providing
services to corporations or other entities who become employees as a result of a
merger or consolidation or other business transaction with the Company or any
Affiliate.

                         VIII. RESTRICTED STOCK AWARDS

      FORFEITURE RESTRICTIONS TO BE ESTABLISHED BY THE COMMITTEE. Shares of
Common Stock that are the subject of a Restricted Stock Award shall be subject
to restrictions on disposition by the Participant and an obligation of the
Participant to forfeit and surrender the shares to the Company under certain
circumstances (the "Forfeiture Restrictions"). The Forfeiture Restrictions shall
be determined by the Committee in its sole discretion, and the Committee may
provide that the Forfeiture Restrictions shall lapse upon (i) the attainment of
one or more performance targets established by the Committee, (ii) the
Participant's continued employment with the Company or an Affiliate for a
specified period of time, (iii) the occurrence of any event or the satisfaction
of any other condition specified by the Committee in its sole discretion, or
(iv) a combination of any of the foregoing. The performance targets described in
clause (i) of the preceding sentence may be subject to adjustment by the
Committee in its sole discretion. Each Restricted Stock Award may have different
Forfeiture Restrictions, in the discretion of the Committee.

            OTHER TERMS AND CONDITIONS. Common Stock awarded pursuant to a
Restricted Stock Award shall be represented by a stock certificate registered in
the name of the Participant. Unless provided otherwise in a Restricted Stock
Agreement, the Participant shall have the right to receive dividends with
respect to Common Stock subject to a Restricted Stock Award, to vote Common
Stock subject thereto and to enjoy all other stockholder rights, except that (i)
the Participant shall not be entitled to delivery of the stock certificate until
the Forfeiture Restrictions have expired, (ii) the Company shall retain custody
of the stock until the Forfeiture Restrictions have expired, (iii) the
Participant may not sell, transfer, pledge, exchange, hypothecate or otherwise
dispose of the stock until the Forfeiture Restrictions have expired, and (iv) a
breach of the terms and conditions established by the Committee pursuant to the
Restricted Stock Agreement shall cause a forfeiture of the Restricted Stock
Award. At the time of such Award, the Committee may, in its sole discretion,
prescribe additional terms, conditions or restrictions

<PAGE>

relating to Restricted Stock Awards, including, but not limited to, rules
pertaining to the termination of employment (by retirement, disability, death or
otherwise) of a Participant prior to expiration of the Forfeitures Restrictions.
Such additional terms, conditions or restrictions shall be set forth in a
Restricted Stock Agreement made in conjunction with the Award.

            PAYMENT FOR RESTRICTED STOCK. The Committee shall determine the
amount and form of any payment for Common Stock received pursuant to a
Restricted Stock Award, provided that in the absence of such a determination, a
Participant shall not be required to make any payment for Common Stock received
pursuant to a Restricted Stock Award, except to the extent otherwise required by
law.

            COMMITTEE'S DISCRETION TO ACCELERATE VESTING OF RESTRICTED STOCK
AWARDS. The Committee may, in its discretion and as of a date determined by the
Committee, fully vest any or all Common Stock awarded to a Participant pursuant
to a Restricted Stock Award and, upon such vesting, all restrictions applicable
to such Restricted Stock Award shall terminate as of such date. Any action by
the Committee pursuant to this Subparagraph may vary among individual
Participants and may vary among the Restricted Stock Awards held by any
individual Participant.

            RESTRICTED STOCK AGREEMENTS. At the time any Award is made under
this Paragraph VIII, the Company and the Participant shall enter into a
Restricted Stock Agreement setting forth each of the matters contemplated hereby
and such other matters as the Committee may determine to be appropriate. The
terms and provisions of the respective Restricted Stock Agreements need not be
identical. Subject to the consent of the Participant, the Committee may, in its
sole discretion, amend an outstanding Restricted Stock Agreement from time to
time in any manner that is not inconsistent with the provisions of the Plan.

                     IX. RECAPITALIZATION OR REORGANIZATION

      NO EFFECT ON RIGHT OR POWER. The existence of the Plan and the Awards
granted hereunder shall not affect in any way the right or power of the Board or
the stockholders of the Company to make or authorize any adjustment,
recapitalization, reorganization or other change in the Company's or any
Affiliate's capital structure or its business, any merger or consolidation of
the Company or any Affiliate, any issue of debt or equity securities ahead of or
affecting Common Stock or the rights thereof, the dissolution or liquidation of
the Company or any Affiliate or any sale, lease, exchange or other disposition
of all or any part of its assets or business or any other corporate act or
proceeding.

            SUBDIVISION OR CONSOLIDATION OF SHARES; STOCK DIVIDENDS. The shares
with respect to which Options may be granted are shares of Common Stock as
presently constituted, but if, and whenever, prior to the expiration of an
Option theretofore granted, the Company shall effect a subdivision or
consolidation of shares of Common Stock or the payment of a stock dividend on
Common Stock without receipt of consideration by the Company, the number of
shares of Common Stock with respect to which such Option may thereafter be
exercised (i) in the event of an increase in the number of outstanding shares
shall be proportionately increased, and the purchase price per share shall be
proportionately reduced, and (ii) in the event of a reduction in the number of
outstanding shares shall be proportionately reduced, and the purchase price per

<PAGE>

share shall be proportionately increased. Any fractional share resulting from
such adjustment shall be rounded down to the next whole share.

            RECAPITALIZATIONS AND CORPORATE CHANGES. If the Company
recapitalizes, reclassifies its capital stock, or otherwise changes its capital
structure (a "recapitalization"), the number and class of shares of Common Stock
covered by an Option theretofore granted shall be adjusted so that such Option
shall thereafter cover the number and class of shares of stock and securities to
which the Participant would have been entitled pursuant to the terms of the
recapitalization if, immediately prior to the recapitalization, the Participant
had been the holder of record of the number of shares of Common Stock then
covered by such Option. If (i) the Company shall not be the surviving entity in
any merger or consolidation (or survives only as a subsidiary of an entity),
(ii) the Company sells, leases or exchanges or agrees to sell, lease or exchange
all or substantially all of its assets to any other person or entity, (iii) the
Company is to be dissolved and liquidated, (iv) any person or entity, including
a "group" as contemplated by Section 13(d)(3) of the 1934 Act, acquires or gains
ownership or control (including, without limitation, power to vote) of more than
50% of the outstanding shares of the Company's voting stock (based upon voting
power), or (v) as a result of or in connection with a contested election of
Directors, the persons who were Directors of the Company before such election
shall cease to constitute a majority of the Board (each such event is referred
to herein as a "Corporate Change"), no later than (x) 10 days after the approval
by the stockholders of the Company of such merger, consolidation,
reorganization, sale, lease or exchange of assets or dissolution or such
election of Directors or (y) 30 days after a Corporate Change of the type
described in clause (iv), the Committee, acting in its sole discretion without
the consent or approval of any Participant, shall effect one or more of the
following alternatives, which alternatives may vary among individual
Participants and which may vary among Options held by any individual
Participant: (1) accelerate the time at which Options then outstanding may be
exercised so that such Options may be exercised in full for a limited period of
time on or before a specified date (before or after such Corporate Change) fixed
by the Committee, after which specified date all unexercised Options and all
rights of Participants thereunder shall terminate, (2) require the mandatory
surrender to the Company by selected Participants of some or all of the
outstanding Options held by such Participants (irrespective of whether such
Options are then exercisable under the provisions of the Plan) as of a date,
before or after such Corporate Change, specified by the Committee, in which
event the Committee shall thereupon cancel such Options and the Company shall
pay (or cause to be paid) to each Participant an amount of cash per share equal
to the excess, if any, of the amount calculated in Subparagraph (d) below (the
"Change of Control Value") of the shares subject to such Option over the
exercise price(s) under such Options for such shares, or (3) make such
adjustments to Options then outstanding as the Committee deems appropriate to
reflect such Corporate Change (provided, however, that the Committee may
determine in its sole discretion that no adjustment is necessary to Options then
outstanding), including, without limitation, adjusting an Option to provide that
the number and class of shares of Common Stock covered by such Option shall be
adjusted so that such Option shall thereafter cover securities of the surviving
or acquiring corporation or other property (including, without limitation, cash)
as determined by the Committee in its sole discretion.

            CHANGE OF CONTROL VALUE. For the purposes of clause (2) in
Subparagraph (c) above, the "Change of Control Value" shall equal the amount
determined in clause (i), (ii) or (iii), whichever is applicable, as follows:
(i) the per share price offered to stockholders of the

<PAGE>

Company in any such merger, consolidation, sale of assets or dissolution
transaction, (ii) the price per share offered to stockholders of the Company in
any tender offer or exchange offer whereby a Corporate Change takes place, or
(iii) if such Corporate Change occurs other than pursuant to a tender or
exchange offer, the fair market value per share of the shares into which such
Options being surrendered are exercisable, as determined by the Committee as of
the date determined by the Committee to be the date of cancellation and
surrender of such Options. In the event that the consideration offered to
stockholders of the Company in any transaction described in this Subparagraph
(d) or Subparagraph (c) above consists of anything other than cash, the
Committee shall determine the fair cash equivalent of the portion of the
consideration offered which is other than cash.

            OTHER CHANGES IN THE COMMON STOCK. In the event of changes in the
outstanding Common Stock by reason of recapitalizations, reorganizations,
mergers, consolidations, combinations, split-ups, split-offs, spin-offs,
exchanges or other relevant changes in capitalization or distributions to the
holders of Common Stock occurring after the date of the grant of any Award and
not otherwise provided for by this Paragraph IX, such Award and any agreement
evidencing such Award shall be subject to adjustment by the Committee at its
sole discretion as to the number and price of shares of Common Stock or other
consideration subject to such Award. In the event of any such change in the
outstanding Common Stock or distribution to the holders of Common Stock, or upon
the occurrence of any other event described in this Paragraph IX, the aggregate
number of shares available under the Plan shall be appropriately adjusted to the
extent, if any, determined by the Committee, whose determination shall be
conclusive.

            STOCKHOLDER ACTION. Any adjustment provided for in the above
Subparagraphs shall be subject to any required stockholder action.

            NO ADJUSTMENTS UNLESS OTHERWISE PROVIDED. Except as hereinbefore
expressly provided, the issuance by the Company of shares of stock of any class
or securities convertible into shares of stock of any class, for cash, property,
labor or services, upon direct sale, upon the exercise of rights or warrants to
subscribe therefor, or upon conversion of shares or obligations of the Company
convertible into such shares or other securities, and in any case whether or not
for fair value, shall not affect, and no adjustment by reason thereof shall be
made with respect to, the number of shares of Common Stock subject to Awards
theretofore granted or the purchase price per share, if applicable.

                    X. AMENDMENT AND TERMINATION OF THE PLAN

      The Board in its discretion may terminate the Plan at any time with
respect to any shares of Common Stock for which Awards have not theretofore been
granted. The Board shall have the right to alter or amend the Plan or any part
thereof from time to time; provided that no change in the Plan may be made that
would impair the rights of a Participant with respect to an Award theretofore
granted without the consent of the Participant.

<PAGE>

                               XI. MISCELLANEOUS

            NO RIGHT TO AN AWARD. Neither the adoption of the Plan nor any
action of the Board or of the Committee shall be deemed to give an employee
any right to be granted an Option, a right to a Restricted Stock Award, or
any other rights hereunder except as may be evidenced by an Option Agreement
or a Restricted Stock Agreement duly executed on behalf of the Company, and
then only to the extent and on the terms and conditions expressly set forth
therein. The Plan shall be unfunded. The Company shall not be required to
establish any special or separate fund or to make any other segregation of
funds or assets to assure the performance of its obligations under any Award.

            NO EMPLOYMENT CONFERRED. Nothing contained in the Plan shall (i)
confer upon any employee any right with respect to continuation of employment
with the Company or any Affiliate or (ii) interfere in any way with the right of
the Company or any Affiliate to terminate his or her employment at any time.

            OTHER LAWS; WITHHOLDING. The Company shall not be obligated to issue
any Common Stock pursuant to any Award granted under the Plan at any time when
the shares covered by such Award have not been registered under the Securities
Act of 1933, as amended, and such other state and federal laws, rules and
regulations as the Company or the Committee deems applicable and, in the opinion
of legal counsel for the Company, there is no exemption from the registration
requirements of such laws, rules and regulations available for the issuance and
sale of such shares. No fractional shares of Common Stock shall be delivered,
nor shall any cash in lieu of fractional shares be paid. The Company shall have
the right to deduct in connection with all Awards any taxes required by law to
be withheld and to require any payments required to enable it to satisfy its
withholding obligations.

            NO RESTRICTION ON CORPORATE ACTION. Nothing contained in the Plan
shall be construed to prevent the Company or any Affiliate from taking any
action which is deemed by the Company or such Affiliate to be appropriate or in
its best interest, whether or not such action would have an adverse effect on
the Plan or any Award made under the Plan. No Participant, beneficiary or other
person shall have any claim against the Company or any Affiliate as a result of
any such action.

            RESTRICTIONS ON TRANSFER. An Award shall not be transferable
otherwise than (i) by will or the laws of descent and distribution, (ii)
pursuant to a qualified domestic relations order as defined by the Code or Title
I of the Employee Retirement Income Security Act of 1974, as amended, or the
rules thereunder, or (iii) with the consent of the Committee.

            GOVERNING LAW. The Plan shall be governed by, and construed in
accordance with, the laws of the State of Texas, without regard to conflicts of
law principles thereof.

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