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                                                                   EXHIBIT 10(b)

                                      1988

                     STOCK OPTION AND RESTRICTED STOCK PLAN

                                       OF

                            UNION PACIFIC CORPORATION

                           (EFFECTIVE APRIL 15, 1988 -
                AS AMENDED SEPTEMBER 26, 1991, FEBRUARY 1, 1992,
                       APRIL 24, 1997, NOVEMBER 20, 1997,
                      SEPTEMBER 24, 1998 AND MAY 25, 2000)

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                   1988 STOCK OPTION AND RESTRICTED STOCK PLAN
                          OF UNION PACIFIC CORPORATION

1.       PURPOSE.

         The purpose of the 1988 Stock Option and Restricted Stock Plan of Union
Pacific Corporation (the "Plan") is to promote the interests of Union Pacific
Corporation (the "Company") and its shareholders by strengthening its ability to
attract and retain officers and key employees in the employ of the Company or of
any subsidiary of the Company by furnishing additional incentives whereby such
present and future officers and key employees may be encouraged to acquire, or
to increase their acquisition of, the Company's common stock, thus maintaining
their personal interest in the Company's continued success and progress. The
Plan provides for the grant of non-qualified stock options, incentive stock
options, stock appreciation rights and shares of Company common stock restricted
in accordance with the provisions of Section 8 below ("Restricted Shares"), all
in accordance with the terms and conditions set forth below. Unless otherwise
required by the context, the term "option" shall refer to non-qualified options,
incentive stock options and stock appreciation rights.

2.       ADMINISTRATION.

         The Plan shall be administered by a Stock Option Committee (the
"Committee"), to be designated by the Board of Directors of the Company and to
be comprised of not less than three members of the Board of Directors who are
not eligible to participate under the Plan. Members of the Committee shall be
appointed from time to time by the Board of Directors for such terms as it shall
determine, and may be removed by the Board at any time with or without cause.
The Committee shall have complete authority to construe and interpret the Plan,
to establish, amend and rescind appropriate rules and regulations relating to
the Plan, to select persons eligible to participate in the Plan, to grant
options and Restricted Shares thereunder, to administer the Plan, to make
recommendations to the Board, and to take all such steps and make all such
determinations in connection with the Plan and the options and Restricted Shares
granted thereunder as it may deem necessary or advisable. All determinations of
the Committee shall be by a majority of its members, and its determinations
shall be final. Each member of the Committee, while serving as such, shall be
considered to be acting in his capacity as a Director of the Company. Each
eligible employee (as defined below) to whom an option or Restricted Shares is
granted is hereinafter referred to as the "Optionee" or the "Participant",
respectively. The granting of an option or Restricted Shares pursuant to the
Plan shall take place when the Committee by resolution, written consent or other
appropriate action determines to grant such an option to an Optionee at a
particular price or such Restricted Shares to a Participant. Each Option or
grant of Restricted Shares shall, if required by the Committee, be evidenced by
a written agreement to be duly executed and delivered by or on behalf of the
Company and the Optionee or Participant, respectively, and contain provisions
not inconsistent with the Plan.

3.       ELIGIBILITY.

         To be eligible for selection by the Committee to participate in the
Plan an individual must be an officer or key employee of the Company, or of any
subsidiary of the Company, as of the date on which the Committee grants to such
individual an option or Restricted Shares (hereinafter collectively referred to
as "eligible employees"). Those Directors who are not full-time salaried
officers or employees shall not be eligible. Subject to the provisions of this
Plan, options or Restricted Shares may be granted to eligible employees in such
number and at such times during the term of this Plan as the Committee shall
determine, the Committee taking into account the duties of the respective
employees, their present and potential contributions to the success of the

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Company, and such other factors as the Committee shall deem relevant in
connection with accomplishing the purpose of the Plan.

4.       STOCK SUBJECT TO THE PLAN.

         Subject to the provisions of Section 10 hereof, the maximum number and
kind of shares as to which options or Restricted Shares may at any time be
granted under the Plan are 8,400,000 shares of common stock of the Company of
the par value of $2.50 per share ("Common Stock") of which shares no more than
400,000 shares of Common Stock may be issued as grants of Restricted Shares
under the Plan. Shares of Common Stock subject to options or granted as
Restricted Shares under the Plan may, in the discretion of the Board of
Directors of the Company, be either authorized but unissued shares or shares
previously issued and reacquired by the Company. Upon the expiration,
termination or cancellation (in whole or in part) of unexercised options, shares
of Common Stock subject thereto shall again be available for option or grant as
Restricted Shares under the Plan. Shares of Common Stock covered by an option,
or portion thereof, which is surrendered upon the exercise of a stock
appreciation right, shall thereafter be unavailable for option or grant as
Restricted Shares under the Plan. Upon the forfeiture (in whole or in part) of a
grant of Restricted Shares, the shares of Common Stock subject to such
forfeiture shall again be available for option or grant as Restricted Shares
under the Plan.

5.       TERMS AND CONDITIONS OF NON-QUALIFIED OPTIONS.

         All non-qualified options under the Plan shall be granted subject to
the following terms and conditions:

         (a) Option Price. The option price per share with respect to each
option shall be determined by the Committee but shall not be less than 100% of
the fair market value of the Common Stock on the date the option is granted,
such fair market value to be determined in accordance with the procedures to be
established by the Committee.

         (b) Duration of Options. Options shall be exercisable at such times and
under such conditions as set forth in the written agreement evidencing such
option, but in no event shall any option be exercisable subsequent to the tenth
anniversary of the date on which the option is granted.

         (c) Exercise of Option. The shares of Common Stock covered by an option
may not be purchased prior to the first anniversary of the date on which the
option is granted (unless the Committee shall determine otherwise), or such
longer period as the Committee may determine in a particular case, but
thereafter may be purchased at one time or in such installments over the balance
of the option period as may be provided in the option. Any shares not purchased
on the applicable installment date may be purchased thereafter at any time prior
to the final expiration of the option. To the extent that the right to purchase
shares has accrued thereunder, options may be exercised from time to time by
notice to the Company stating the number of shares with respect to which the
option is being exercised.

          (d) Payment. Shares of Common Stock purchased under options shall, at
the time of purchase, be paid for in full. All, or any portion, of the option
exercise price may, at the discretion of the Committee, be paid by the surrender
to the Company, at the time of exercise, of shares of previously acquired Common
Stock owned by the Optionee, to the extent that such payment does not require
the surrender of a fractional share of such previously acquired Common Stock. In
addition, to the extent permitted by the Committee, the option exercise price
may be paid by authorizing the Company to withhold Common Stock otherwise
issuable upon exercise of the option. Such shares previously acquired or shares
withheld to pay the option exercise price shall be valued at fair market value
on the date the option is exercised in accordance with the procedures to be
established

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by the Committee. No shares shall be issued or delivered until full payment
therefor has been made. A holder of an option shall have none of the rights of a
stockholder until the shares of Common Stock are issued to him. If an amount is
payable by an Optionee to the Company under applicable income tax laws in
connection with the exercise of non-qualified options, the Committee may, in its
discretion and subject to such rules as it may adopt, permit the Optionee to
make such payment, in whole or in part, by electing to authorize the Company to
withhold or accept shares of Common Stock having a fair market value equal to
the amount to be paid under such income tax laws.

         (e) Restrictions. The Committee shall determine, with respect to each
option, the nature and extent of the restrictions, if any, to be imposed on the
shares of Common Stock which may be purchased thereunder including restrictions
on the transferability of such shares acquired through the exercise of such
option. Without limiting the generality of the foregoing, the Committee may
impose conditions restricting absolutely the transferability of shares acquired
through the exercise of options for such periods as the Committee may determine
and, further, that in the event the Optionee's employment by the Company or a
subsidiary terminates during the period in which such shares are
non-transferable, the Optionee shall be required to sell such shares back to the
Company at such price as the Committee may specify in the option.

         (f) Purchase for Investment. The Committee shall have the right to
require that each Optionee or other person who shall exercise an option under
the Plan, and each person into whose name shares of Common Stock shall be
issued, pursuant to the exercise of an option, jointly with that of any
Optionee, represent and agree that any and all shares of Common Stock of the
Company purchased pursuant to such option will be purchased for investment and
not with a view to the distribution or resale thereof or that such shares will
not be sold except in accordance with such restrictions or limitations as may be
set forth in the written agreement granting such option; provided, however, that
the foregoing provisions of this subparagraph (f) shall be inoperative during
any period of time when the Company has obtained all necessary or advisable
approvals from any governmental agency and has completed all necessary or
advisable registrations or other qualification of shares of Common Stock as to
which options may from time to time be granted, all as contemplated by Section 9
hereof.

         (g) Non-Transferability of Options. During an Optionee's lifetime, the
option may be exercised only by him. Options shall not be transferable, except
for exercise by the Optionee's legal representatives or beneficiaries.

         (h) Termination of Employment. Upon the termination of an Optionee's
employment, for any reason other than death, then, except as provided below, the
option shall be exercisable only as to those shares of Common Stock which were
then subject to the exercise of such option (unless the Committee shall
determine in a specific case that particular limitations and restrictions under
the Plan shall not apply) and such option shall expire according to the
following schedule:

                  (i)      Retirement. Option shall expire, unless exercised,
                           five (5) years after the Optionee's retirement from
                           the Company or any subsidiary of the Company under
                           the provisions of the Company's or a subsidiary's
                           pension plans.

                  (ii)     Disability. Option shall expire, unless exercised,
                           five (5) years after the date the Optionee is
                           eligible to receive disability benefits under the
                           provisions of the Company's or a subsidiary's
                           long-term disability plan.

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                  (iii)    Disposition of Business. In the case of a termination
                           resulting from the disposition by the Company or any
                           of its subsidiaries of all or a part of its interest
                           in, or the discontinuance of a business of, a
                           subsidiary, division or other business unit, the
                           option shall expire, unless exercised, five (5) years
                           after the date of termination;

                  (iv)     Force Reduction Program. In the case of termination
                           (other than retirement) resulting from a force
                           reduction program instituted by the Company or any of
                           its Subsidiaries, the option shall expire, unless
                           exercised, at the later of (A) three (3) years from
                           the date of termination, or (B) the earlier of (x)
                           three (3) years from the date the option becomes
                           exercisable and (y) five (5) years from the date of
                           termination.

                  (v)      All Other Terminations. Option shall expire, unless
                           exercised, three (3) months after the date of such
                           termination.

                  (vi)     Gross Misconduct. Option shall expire upon receipt by
                           Optionee of the notice of termination if he is
                           terminated for deliberate, willful or gross
                           misconduct as determined by the Company.

         (i) Death of Optionee. Upon the death of an Optionee during his period
of employment, his option shall be exercisable only as to those shares of Common
Stock which were subject to the exercise of such option at the time of his death
(unless the Committee shall determine in a specific case that particular
limitations and restrictions under the Plan shall not apply) and such option
shall expire, unless exercised by his legal representatives or beneficiaries,
five (5) years after the date of his death.

         (j) The Committee may permit an Optionee to elect to defer receipt of
all or part of the Common Stock issuable upon the exercise of an option,
pursuant to rules and regulations adopted by the Committee. The Committee may
permit the payment of cash in lieu of Common Stock upon payment of the deferred
amount.

In no event, however, shall any option be exercisable pursuant to Sections 5(h)
and (i) subsequent to the tenth anniversary of the date on which it is granted.

6.       TERMS AND CONDITIONS OF STOCK APPRECIATION RIGHTS.

(a) General. The Committee may also grant a stock appreciation right in
connection with a non-qualified option, either at the time of grant or by
amendment. Such stock appreciation right shall cover the same shares covered by
such option (or such lesser number of shares of Common Stock as the Committee
may determine) and shall, except for the provisions of Section 5(d) hereof, be
subject to the same terms and conditions as the related non-qualified option.

(b) Exercise and Payment. Each stock appreciation right shall entitle the
Optionee to surrender to the Company unexercised the related option, or any
portion thereof, and to receive from the Company in exchange therefor an amount
equal to the excess of the fair market value of one share of Common Stock over
the option price per share times the number of shares covered by the option, or
portion thereof, which is surrendered. Payment shall be made in shares of Common
Stock valued at fair market value, or in cash, or partly in shares and partly in
cash, all as shall be determined by the Committee. The fair market value shall
be the value determined in accordance with procedures established by the
Committee. Stock appreciation rights may be exercised from time to time upon
actual receipt by the Company of written notice stating the number of shares of
Common Stock with respect to which the stock appreciation right is being
exercised. No fractional

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shares shall be issued but instead cash shall be paid for a fraction or, if the
Committee should so determine, the number of shares shall be rounded downward to
the next whole share. If an amount is payable by an Optionee to the Company
under applicable income tax laws in connection with exercises of stock
appreciation rights, the Committee may, in its discretion and subject to such
rules as it may adopt, permit the Optionee to make such payment, in whole or in
part, by electing to authorize the Company to withhold or accept shares of
Common Stock having a fair market value equal to the amount to be paid under
such income tax laws.

         (c) Restrictions. The obligation of the Company to satisfy any stock
appreciation right exercised by an Optionee subject to Section 16 of the
Securities Exchange Act of 1934, as amended, shall be conditioned upon the prior
receipt by the Company of an opinion of counsel to the Company that any such
satisfaction will not create an obligation on the part of such Optionee pursuant
to Section 16(b) of such Act to reimburse the Company for any statutory profit
which might be held to result from such satisfaction.

7.       TERMS AND CONDITIONS OF INCENTIVE STOCK OPTIONS.

         (a) General. The Committee may also grant incentive stock options as
defined under section 422A of the Internal Revenue Code of 1986, as amended (the
"Code"). All incentive stock options issued under the Plan shall, except for the
provisions of Sections 5(h) and (i) and Section 6 hereof, be subject to the same
terms and conditions as the non-qualified options granted under the Plan
provided that the third sentence of Section 5(d) shall not apply to incentive
stock options granted prior to February 1, 1992. In addition, incentive stock
options shall be subject to the conditions of Sections 7(b), (c) and (d).

         (b) Limitation of Exercise. The aggregate fair market value (determined
as of the date the incentive stock option is granted) of the shares of stock
with respect to which incentive stock options are exercisable for the first time
by such Optionee during any calendar year, under this Plan or any other stock
option plans adopted by the Company, its Subsidiaries or any predecessor
companies thereof, shall not exceed $100,000.

          (c) Termination of Employment. Upon the termination of an Optionee's
employment, for any reason other than death, his incentive stock option shall be
exercisable only as to those shares of Common Stock which were then subject to
the exercise of such option (unless the Committee shall determine in a specific
case that particular limitations and restrictions under the Plan shall not
apply), and such option shall expire as an incentive stock option (but shall
remain a non-qualified option exercisable pursuant to the terms of Section 5
hereof less the time period already elapsed under such Section), according to
the following schedule:

                  (i)      Retirement. An incentive stock option shall expire,
                           unless exercised, three (3) months after the
                           Optionee's retirement from the Company or any
                           Subsidiary of the Company under the provisions of the
                           Company's or a subsidiary's pension plans.

                  (ii)     Disability. In the case of an Optionee who is
                           disabled within the meaning of section 22(e)(3) of
                           the Code, an incentive stock option shall expire,
                           unless exercised, twelve (12) months after the date
                           the Optionee terminates employment or the date the
                           Optionee is eligible to receive disability benefits
                           under the provisions of the Company's or a
                           subsidiary's long-term disability plan, whichever is
                           earlier.

                  (iii)    Gross Misconduct. An incentive stock option shall
                           expire upon receipt by an Optionee of the notice of
                           termination if he is terminated for deliberate,
                           willful or gross misconduct as determined by the
                           Company.

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                  (iv)     All Other Terminations. An incentive stock option
                           shall expire, unless exercised, three (3) months
                           after the date of such termination.

         In the case of incentive stock options granted after April 24, 1997,
the Committee may extend the period during which an incentive stock option may
be exercised as a non-qualified stock option to up to three (3) years from the
date of a termination not due to retirement, disability or gross misconduct or,
if later, three (3) years from the date the option becomes exercisable but not
more than five years after the date of such a termination.

         (d) Death of Optionee. Upon the death of an Optionee during his period
of employment, his incentive stock option shall be exercisable as an incentive
stock option only as to those shares of Common Stock which were subject to the
exercise of such option at the time of his death (unless the Committee shall
determine in a specific case that particular limitations and restrictions under
the Plan shall not apply), and such option shall expire, unless exercised by his
legal representatives or beneficiaries, five (5) years after the date of his
death.

In no event, however, shall any incentive stock option be exercisable pursuant
to Sections 7(c) and (d) subsequent to the tenth anniversary of the date on
which it was granted.

8.       TERMS AND CONDITIONS OF RESTRICTED SHARES.

         (a) General. With respect to each grant of Restricted Shares under the
Plan, the Committee, in its sole discretion, shall determine the period during
which the restrictions set forth in Section 8(b) shall apply to such Restricted
Shares (the "Restricted Period"). The Restricted Period shall not be less than
36 nor more than 60 consecutive months commencing with the first day of the
month in which the Restricted Shares are granted. Subject to the provisions of
Section 8(c), a grant of Restricted Shares shall be effective for the Restricted
Period and may not be revoked. Approved leaves of absence of one year or less
shall not be deemed terminations or interruptions in continuous service under
this Section 8. Leaves of absence of more than one year will be deemed to be
terminations under this Section unless the Committee determines otherwise.

         (b) Restrictions. At the time of grant of Restricted Shares to a
Participant, a certificate representing the number of shares of Common Stock
granted shall be registered in his name but shall be held by the Company for the
account of the Participant. The Participant shall have the entire beneficial
ownership interest in, and all rights and privileges of a stockholder as to,
such Restricted Shares, including the right to receive dividends and the right
to vote such Restricted Shares, subject to the following restrictions: (i)
subject to Section 8(c) hereof, the Participant shall not be entitled to
delivery of the stock certificate until the expiration of the Restricted Period;
(ii) none of the Restricted Shares may be sold, transferred, assigned, pledged,
or otherwise encumbered or disposed of during the Restricted Period; and (iii)
all of the Restricted Shares shall be forfeited and all rights of the
Participant to such Restricted Shares shall terminate without further obligation
on the part of the Company unless the Participant remains in the continuous
employment of the Company or a Subsidiary for the entire Restricted Period in
relation to which such Restricted Shares were granted, except as provided by
Section 8(c) hereof. Any shares of Common Stock received as a result of a
transaction listed in Section 10 hereof shall be subject to the same
restrictions as such Restricted Shares unless the Committee shall determine
otherwise.

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         (c)      Termination of Employment.

                  (i)      Disability and Retirement. If a Participant ceases to
                           be an employee of the Company or a subsidiary prior
                           to the end of a Restricted Period by reason of
                           disability (as defined in Section 5(h)(ii) hereof) or
                           retirement (as defined in Section 5(h)(i) hereof),
                           the number of Restricted Shares granted to such
                           Participant for such Restricted Period shall be
                           reduced in proportion to the Restricted Period
                           (determined on a monthly basis) remaining after the
                           Participant ceases to be an employee and all
                           restrictions on such reduced number of shares shall
                           lapse. A certificate for such shares shall be
                           delivered to the Participant in accordance with the
                           provisions of Section 8(d) hereof. The Committee may,
                           if it deems appropriate, direct that the Participant
                           receive a greater number of shares of Common Stock
                           free of all restrictions but not exceeding the number
                           of Restricted Shares then subject to the restrictions
                           of Section 8(b).

                  (ii)     Death. If a Participant ceases to be an employee
                           prior to the end of a Restricted Period by reason of
                           death, the Restricted Shares granted to such
                           participant shall immediately vest in his beneficiary
                           or estate and all restrictions applicable to such
                           shares shall lapse. A certificate for such shares
                           shall be delivered to the Participant's beneficiary
                           or estate in accordance with the provisions of
                           Section 8(d) hereof.

                  (iii)    All Other Terminations. If a Participant ceases to be
                           an employee prior to the end of a Restricted Period
                           for any reason other than death, disability or
                           retirement, the Participant shall immediately forfeit
                           all Restricted Shares then subject to the
                           restrictions of Section 8(b) hereof in accordance
                           with the provisions thereof, except that the
                           Committee may, if it finds that the circumstances in
                           the particular case so warrant, allow a participant
                           whose employment has so terminated to retain any or
                           all of the Restricted Shares then subject to the
                           restrictions of Section 8(b) and all restrictions
                           applicable to such retained shares shall lapse. A
                           certificate for such retained shares shall be
                           delivered to the Participant in accordance with the
                           provisions of Section 8(d) hereof.

         (d) Payment of Restricted Shares. At the end of the Restricted Period
or at such earlier time as provided for in Section 8(c) hereof or as the
Committee may determine, all restrictions applicable to the Restricted Shares
shall lapse and a stock certificate for a number of shares of Common Stock equal
to the number of Restricted Shares, free of all restrictions, shall be delivered
to the Participant or his beneficiary or estate, as the case may be. The Company
shall not be required to deliver any fractional share of Common Stock but shall
pay, in lieu thereof, the fair market value (measured as of the date the
restrictions lapse) of such fractional share to the Participant or his
beneficiary or estate, as the case may be. If an amount is payable by a
Participant to the Company under applicable income tax laws in connection with
the lapse of such restrictions, the Committee may, in its discretion and subject
to such rules as it may adopt, permit the Participant to make such payment, in
whole or in part, by electing to authorize the Company to transfer to the
Company Restricted Shares otherwise deliverable to the Participant having a fair
market value equal to the amount to be paid under such income tax laws.

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9.       REGULATORY APPROVALS AND LISTING.

         The Company shall not be required to issue any certificate or
certificates for shares of Common Stock upon the exercise of an option or a
stock appreciation right or the vesting of Restricted Shares granted under the
Plan prior to (i) the obtaining of any approval from any governmental agency
which the Company shall, in its sole discretion, determine to be necessary or
advisable, (ii) the admission of such shares to listing on any stock exchange on
which the Common Stock may then be listed, and (iii) the completion of any
registration or other qualification of such shares under any state or Federal
law or rulings or regulations of any governmental body which the Company shall,
in its sole discretion, determine to be necessary or advisable.

10.      ADJUSTMENT IN EVENT OF CHANGES IN CAPITALIZATION.

         In the event of a recapitalization, stock split, stock dividend,
combination or exchange of shares, merger, consolidation, rights offering,
separation, reorganization or liquidation, or any other change in the corporate
structure or shares of the Company, the Board of Directors of the Company, upon
recommendation of the Committee, may make such equitable adjustments, designed
to protect against dilution, as it may deem appropriate in the number and kind
of shares authorized by the Plan thereby and in the option price and, with
respect to grants of Restricted Shares, in the number and kind of shares covered
thereby.

11.      TERM OF PLAN.

         No non-qualified option, incentive stock option, stock appreciation
right or Restricted Shares shall be granted pursuant to this Plan after April
14, 1998, but non-qualified options, incentive stock options, stock appreciation
rights and grants of Restricted Shares theretofore granted may extend beyond
that date and the terms and conditions of this Plan shall continue to apply
thereto and to shares of Common Stock acquired upon exercise of such options or
stock appreciation rights.

12.      TERMINATION OR AMENDMENT OF THE PLAN.

         The Board of Directors may at any time terminate the Plan with respect
to any shares of the Company not at the time subject to option or the provisions
of Section 8, and may from time to time alter or amend the Plan or any part
thereof (including, but without limiting the generality of the foregoing, any
amendment deemed necessary to ensure that the Company may obtain any regulatory
approval, referred to in clause (i) of Section 9 hereof), provided that no
change in any option or Restricted Shares theretofore granted may be made which
would impair the rights of an Optionee or a Participant, respectively, without
the consent of such Optionee or Participant and, further, that without the
approval of stockholders, no alteration or amendment may be made which would (i)
increase the maximum number of shares of Common Stock subject to the Plan as set
forth in Section 4 (except by operation of Section 10), (ii) extend the term of
the Plan or extend the term of options granted thereunder to beyond the tenth
anniversary of the date of grant, (iii) reduce the option price at which options
may be granted, or (iv) change the class of eligible employees who may receive
options or Restricted Shares under the Plan. The Committee may amend the Plan to
extend the exercise period following an Optionee's termination of an option
granted prior to September 24, 1998, but not beyond (i) in the case of a
termination resulting from the disposition by the Company of all or a part of
its interest in, or the discontinuance of the business of, a subsidiary,
division or other business unit of the Company, five years from the date of
termination and (ii) in the case of all other terminations, not more than three
years from the date of termination, or, if later, three years from the date the
option becomes exercisable but not more than five years after the date of such
termination.

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13.      EFFECTIVE DATE OF PLAN.

         The Plan shall become effective April 15, 1988 upon approval of the
shareholders of the Company.

                                      -10-<PAGE>   1
                                                                   EXHIBIT 10(c)

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

                                      1993

                      STOCK OPTION AND RETENTION STOCK PLAN

                                       OF

                            UNION PACIFIC CORPORATION

                           (EFFECTIVE APRIL 16, 1993 -
                         AS AMENDED SEPTEMBER 30, 1993,
                JULY 28, 1994, APRIL 24, 1997, NOVEMBER 20, 1997,
                         SEPTEMBER 24, 1998, MAY 27, 1999
                                AND MAY 25, 2000)

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

<PAGE>   2
                   1993 STOCK OPTION AND RETENTION STOCK PLAN
                          OF UNION PACIFIC CORPORATION

1.       PURPOSE

         The purpose of the 1993 Stock Option and Retention Stock Plan of Union
Pacific Corporation is to promote and closely align the interests of employees
of Union Pacific Corporation and its shareholders by providing stock based
compensation. The Plan is intended to strengthen Union Pacific Corporation's
ability to reward performance which enhances long term shareholder value; to
increase employee stock ownership through performance based compensation plans;
and to strengthen the company's ability to attract and retain an outstanding
employee and executive team.

2.       DEFINITIONS

         The following terms shall have the following meanings:

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

         "Approved Leave of Absence" means a leave of absence of definite length
approved by the Senior Vice President - Human Resources of the Company, or by
any other officer of the Company to whom the Committee delegates such authority.

         "Award" means an award of Retention Shares or Stock Units pursuant to
the Plan.

         "Beneficiary" means any person or persons designated in writing by a
Participant to the Committee on a form prescribed by it for that purpose, which
designation shall be revocable at any time by the Participant prior to his or
her death, provided that, in the absence of such a designation or the failure of
the person or persons so designated to survive the Participant, "Beneficiary"
shall mean such Participant's estate; and further provided that no designation
of Beneficiary shall be effective unless it is received by the Company before
the Participant's death.

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

         "Code" means the Internal Revenue Code of 1986, as amended, or the
corresponding provisions of any successor statute.

         "Committee" means the Committee designated by the Board to administer
the Plan pursuant to Section 3.

         "Common Stock" means the Common Stock, par value $2.50 per share, of
the Company.

         "Company" means Union Pacific Corporation, a Utah corporation, or any
successor corporation.

         "Option" means each non-qualified stock option, incentive stock option
and stock appreciation right granted under the Plan.

                                      -2-
<PAGE>   3
         "Optionee" means any employee of the Company or a Subsidiary (including
directors who are also such employees) who is granted an Option under the Plan.

         "Participant" means any employee of the Company or a Subsidiary
(including directors who are also such employees) who is granted an Award under
the Plan.

         "Plan" means this 1993 Stock Option and Retention Stock Plan, as
amended from time to time.

         "Retention Shares" means shares of Common Stock subject to an Award
granted under the Plan.

         "Restriction Period" means the period defined in Section 9(a).

         "Stock Unit" means the right to receive in the future a share of Common
Stock.

         "Subsidiary" means any corporation of which the Company owns directly
or indirectly at least a majority of the outstanding shares of voting stock.

         "Unit Restriction Period" means the period defined in Section 10.

         "Unit Vesting Condition" means any condition to the vesting of Stock
Units established by the Committee pursuant to Section 10.

         "Vesting Condition" means any condition to the vesting of Retention
Shares established by the Committee pursuant to Section 9.

3.       ADMINISTRATION

         The Plan shall be administered by the Committee, which shall be
comprised of not less than three members of the Board, none of whom shall be
employees of the Company or any Subsidiary. The Committee shall (i) grant
Options to Optionees and make Awards of Retention Shares and Stock Units to
Participants, and (ii) determine the terms and conditions of such Options and
Awards of Retention Shares and Stock Units, all in accordance with the
provisions of the Plan. The Committee shall have full authority to construe and
interpret the Plan, to establish, amend and rescind rules and regulations
relating to the Plan, to administer the Plan, and to take all such steps and
make all such determinations in connection with the Plan and Options and Awards
granted thereunder as it may deem necessary or advisable. Each Option and grant
of Retention Shares or Stock Units shall, if required by the Committee, be
evidenced by an agreement to be executed by the Company and the Optionee or
Participant, respectively, and contain provisions not inconsistent with the
Plan. All determinations of the Committee shall be by a majority of its members
and shall be evidenced by resolution, written consent or other appropriate
action, and the Committee's determinations shall be final. Each member of the
Committee, while serving as such, shall be considered to be acting in his or her
capacity as a director of the Company.

4.       ELIGIBILITY

         To be eligible for selection by the Committee to participate in the
Plan an individual must be an employee of the Company or a Subsidiary. Directors
who are not full-time salaried employees shall not be eligible. In granting
Options or Awards of Retention Shares or Stock Units to eligible employees, the
Committee shall take into account the duties of the respective employees, their
present and potential

                                      -3-
<PAGE>   4

contributions to the success of the Company or a Subsidiary, and such other
factors as the Committee shall deem relevant in connection with accomplishing
the purpose of the Plan.

5.       STOCK SUBJECT TO THE PLAN

Subject to the provisions of Section 13 hereof, the maximum number and kind of
shares as to which Options, or Retention Shares or Stock Units may at any time
be granted under the Plan are 16 million shares of Common Stock. Shares of
Common Stock subject to Options or Awards under the Plan may be either
authorized but unissued shares or shares previously issued and reacquired by the
Company. Upon the expiration, termination or cancellation (in whole or in part)
of unexercised Options, shares of Common Stock subject thereto shall again be
available for option or grant as Retention Shares or Stock Units under the Plan.
Shares of Common Stock covered by an Option, or portion thereof, which is
surrendered upon the exercise of a stock appreciation right, shall thereafter be
unavailable for option or grant as Retention Shares or Stock Units under the
Plan. Upon the forfeiture (in whole or in part) of a grant of Retention Shares
or Stock Units, the shares of Common Stock subject to such forfeiture shall
again be available for option or grant as Retention Shares or Stock Units under
the Plan if no dividends have been paid on the forfeited shares, and otherwise
shall be unavailable for such an option or grant.

6.       TERMS AND CONDITIONS OF NON-QUALIFIED OPTIONS

         All non-qualified options under the Plan shall be granted subject to
the following terms and conditions:

         a. Option Price. The option price per share with respect to each option
shall be determined by the Committee but shall not be less than 100% of the fair
market value of the Common Stock on the date the option is granted, such fair
market value to be determined in accordance with the procedures to be
established by the Committee.

         b. Duration of Options. Options shall be exercisable at such time or
times and under such conditions as set forth in the written agreement evidencing
such option, but in no event shall any option be exercisable subsequent to the
tenth anniversary of the date on which the option is granted.

         c. Exercise of Option. Except as provided in Section 6(h), 6(i) or
Section 8(c) or 8(d), the shares of Common Stock covered by an option may not be
purchased prior to the first anniversary of the date on which the option is
granted (unless the Committee shall determine otherwise), or such longer period
or periods, and subject to such conditions, as the Committee may determine, but
thereafter may be purchased at one time or in such installments over the balance
of the option period as may be provided in the option. Any shares not purchased
on the applicable installment date may, unless the Committee shall have
determined otherwise, be purchased thereafter at any time prior to the final
expiration of the option. To the extent that the right to purchase shares has
accrued thereunder, options may be exercised from time to time by notice to the
Company stating the number of shares with respect to which the option is being
exercised.

         d. Payment. Shares of Common Stock purchased under options shall, at
the time of purchase, be paid for in full. All, or any portion, of the option
exercise price may, at the discretion of the Committee, be paid by the surrender
to the Company, at the time of exercise, of shares of previously acquired Common
Stock owned by the Optionee, to the extent that such payment does not require
the surrender of a fractional share of such previously acquired Common Stock. In
addition, to the extent permitted by the Committee, the option exercise price
may be paid by authorizing the Company to withhold Common Stock otherwise
issuable on exercise of the option. Such shares previously acquired or shares
withheld to pay the option exercise price shall

                                      -4-
<PAGE>   5

be valued at fair market value on the date the option is exercised in accordance
with the procedures to be established by the Committee. A holder of an option
shall have none of the rights of a stockholder until the shares of Common Stock
are issued to him or her. If an amount is payable by an Optionee to the Company
or a Subsidiary under applicable withholding tax laws in connection with the
exercise of non-qualified options, the Committee may, in its discretion and
subject to such rules as it may adopt, permit the Optionee to make such payment,
in whole or in part, by electing to authorize the Company to withhold or accept
shares of Common Stock having a fair market value equal to the amount to be paid
under such withholding tax laws.

         e. Restrictions. The Committee shall determine, with respect to each
option, the nature and extent of the restrictions, if any, to be imposed on the
shares of Common Stock that may be purchased thereunder including restrictions
on the transferability of such shares acquired through the exercise of such
option. Without limiting the generality of the foregoing, the Committee may
impose conditions restricting absolutely or conditionally the transferability of
shares acquired through the exercise of options for such periods, and subject to
such conditions, including continued employment of the Optionee by the Company
or a Subsidiary, as the Committee may determine.

         f. Purchase for Investment. The Committee shall have the right to
require that each Optionee or other person who shall exercise an option under
the Plan represent and agree that any shares of Common Stock purchased pursuant
to such option will be purchased for investment and not with a view to the
distribution or resale thereof or that such shares will not be sold except in
accordance with such restrictions or limitations as may be set forth in the
written agreement granting such option.

         g. Non-Transferability of Options. During an Optionee's lifetime, the
option may be exercised only by the Optionee. Options shall not be transferable,
except for exercise by the Optionee's legal representatives or heirs.

         h. Termination of Employment. Upon the termination of an Optionee's
employment for any reason other than death, then, except as provided below, the
option shall be exercisable only as to those shares of Common Stock which were
then subject to the exercise of such option (provided that the Committee may
determine that particular limitations and restrictions under the Plan shall not
apply) and such option shall expire according to the following schedule (unless
the Committee shall provide for shorter periods at the time the option is
granted):

                  (i)      Retirement. Option shall expire, unless exercised,
                           five (5) years after the Optionee's retirement from
                           the Company or any Subsidiary under the provisions of
                           the Company's or a Subsidiary's pension plan.

                  (ii)     Disability. Any holding period required by Section
                           6(c) shall automatically be deemed to be satisfied
                           and Option shall expire, unless exercised, five (5)
                           years after the date the Optionee is eligible to
                           receive disability benefits under the provisions of
                           the Company's or a Subsidiary's long-term disability
                           plan.

                  (iii)    Disposition of Business. In the case of a termination
                           resulting from the disposition by the Company or any
                           of its Subsidiaries of all or a part of its interest
                           in, or the discontinuance of a business of, a
                           subsidiary, division or other business unit, unvested
                           options shall not be forfeited, but any holding
                           period required by Section 6(c) shall be satisfied in
                           accordance with its original schedule (including any
                           holding period associated with an option that becomes
                           a non-qualified option in

                                      -5-
<PAGE>   6

                           accordance with Section 8(c)) and Option shall
                           expire, unless exercised, five (5) years after the
                           date of termination;

                  (iv)     Force Reduction Program. In the case of a termination
                           (other than retirement) resulting from a force
                           reduction program instituted by the Company or any of
                           its Subsidiaries, unvested options shall not be
                           forfeited, but any holding period required by Section
                           6(c) shall be satisfied in accordance with its
                           original schedule (including any holding period
                           associated with an option that becomes a
                           non-qualified option in accordance with Section
                           8(c)), and the Option shall expire, unless exercised,
                           at the later of (A) three (3) years from the date of
                           termination, or (B) the earlier of (x) three (3)
                           years from the date the option becomes exercisable
                           and (y) five (5) years from the date of termination;

                  (v)      Gross Misconduct. Option shall expire upon receipt by
                           the Optionee of the notice of termination if he or
                           she is terminated for deliberate, willful or gross
                           misconduct as determined by the Company.

                  (vi)     All Other Terminations. Option shall expire, unless
                           exercised, three (3) months after the date of such
                           termination.

         i. Death of Optionee. Upon the death of an Optionee during his or her
period of employment, the option shall be exercisable only as to those shares of
Common Stock which were subject to the exercise of such option at the time of
his or her death, provided that (i) any holding period required by Section 6(c)
shall automatically be deemed to be satisfied and (ii) the Committee may
determine that particular limitations and restrictions under the Plan shall not
apply, and such option shall expire, unless exercised by the Optionee's legal
representatives or heirs, five (5) years after the date of death (unless the
Committee shall provide for a shorter period at the time the option is granted).

         j. Deferral. The Committee may permit an Optionee to elect to defer
receipt of all or part of the Common Stock issuable upon the exercise of an
option, pursuant to rules and regulations adopted by the Committee. The
Committee may not permit the payment of cash in lieu of Common Stock upon
payment of the deferred amount.

In no event, however, shall any option be exercisable pursuant to Sections 6(h)
or (i) subsequent to the tenth anniversary of the date on which it is granted.

7.       TERMS AND CONDITIONS OF STOCK APPRECIATION RIGHTS

         a. General. The Committee may also grant a stock appreciation right in
connection with a non-qualified option, either at the time of grant or by
amendment. Such stock appreciation right shall cover the same shares covered by
such option (or such lesser number of shares of Common Stock as the Committee
may determine) and shall, except for the provisions of Section 6(d) hereof, be
subject to the same terms and conditions as the related non-qualified option.

         b. Exercise and Payment. Each stock appreciation right shall entitle
the Optionee to surrender to the Company unexercised the related option, or any
portion thereof, and to receive from the Company in exchange therefor an amount
equal to the excess of the fair market value of one share of Common Stock over
the option price per share times the number of shares covered by the option, or
portion thereof, which is

                                      -6-
<PAGE>   7

surrendered. Payment shall be made in shares of Common Stock valued at fair
market value, or in cash, or partly in shares and partly in cash, all as shall
be determined by the Committee. The fair market value shall be the value
determined in accordance with procedures established by the Committee. Stock
appreciation rights may be exercised from time to time upon actual receipt by
the Company of written notice stating the number of shares of Common Stock with
respect to which the stock appreciation right is being exercised, provided that
if a stock appreciation right expires unexercised, it shall be deemed exercised
on the expiration date if any amount would be payable with respect thereto. No
fractional shares shall be issued but instead cash shall be paid for a fraction
or, if the Committee should so determine, the number of shares shall be rounded
downward to the next whole share. If an amount is payable by an Optionee to the
Company or a Subsidiary under applicable withholding tax laws in connection with
the exercise of stock appreciation rights, the Committee may, in its discretion
and subject to such rules as it may adopt, permit the Optionee to make such
payment, in whole or in part, by electing to authorize the Company to withhold
or accept shares of Common Stock having a fair market value equal to the amount
to be paid under such withholding tax laws.

         c. Restrictions. The obligation of the Company to satisfy any stock
appreciation right exercised by an Optionee subject to Section 16 of the Act
shall be conditioned upon the prior receipt by the Company of an opinion of
counsel to the Company that any such satisfaction will not create an obligation
on the part of such Optionee pursuant to Section 16(b) of the Act to reimburse
the Company for any statutory profit which might be held to result from such
satisfaction.

8.       TERMS AND CONDITIONS OF INCENTIVE STOCK OPTIONS.

         a. General. The Committee may also grant incentive stock options as
defined under section 422 of the Code. All incentive stock options issued under
the Plan shall, except for the provisions of Sections 6(h) and (i) and Section 7
hereof, be subject to the same terms and conditions as the non-qualified options
granted under the Plan. In addition, incentive stock options shall be subject to
the conditions of Sections 8(b), (c), (d) and (e).

         b. Limitation of Exercise. The aggregate fair market value (determined
as of the date the incentive stock option is granted) of the shares of stock
with respect to which incentive stock options are exercisable for the first time
by such Optionee during any calendar year, under this Plan or any other stock
option plans adopted by the Company, its Subsidiaries or any predecessor
companies thereof, shall not exceed $100,000. If any incentive stock options
become exercisable in any year in excess of the $100,000 limitation, options
representing such excess shall become non-qualified options exercisable pursuant
to the terms of Section 6 hereof and shall not be exercisable as incentive stock
options.

         c. Termination of Employment. Upon the termination of an Optionee's
employment, for any reason other than death, his or her incentive stock option
shall be exercisable only as to those shares of Common Stock which were then
subject to the exercise of such option except as provided below (provided that
the Committee may determine that particular limitations and restrictions under
the Plan shall not apply) and such option shall expire as an incentive stock
option according to the following schedule (unless the Committee shall provide
for shorter periods at the time the incentive stock option is granted) but
shall, in all cases other than 8(c)(iii) and 8(c)(iv), at the end of the period
referred to below become a non-qualified option exercisable pursuant to the
terms of Section 6 hereof (including Sections 6(h) and (i)) less the period
already elapsed under such Section:

                                      -7-
<PAGE>   8

                  (i)      Retirement. An incentive stock option shall expire,
                           unless exercised, three (3) months after the
                           Optionee's retirement from the Company or any
                           Subsidiary under the provisions of the Company's or a
                           Subsidiary's pension plan.

                  (ii)     Disability. In the case of an Optionee who is
                           disabled within the meaning of section 22(e)(3) of
                           the Code, any holding period required by Section 6(c)
                           shall automatically be deemed to be satisfied and an
                           incentive stock option shall expire, unless
                           exercised, one (1) year after the earlier of the date
                           the Optionee terminates employment or the date the
                           Optionee is eligible to receive disability benefits
                           under the provisions of the Company's or a
                           Subsidiary's long-term disability plan.

                  (iii)    Gross Misconduct. An incentive stock option shall
                           expire upon receipt by the Optionee of the notice of
                           termination if he or she is terminated for
                           deliberate, willful or gross misconduct as determined
                           by the Company.

                  (iv)     All Other Terminations. An incentive stock option
                           shall expire, unless exercised, three (3) months
                           after the date of such termination.

         d. Incentive Stock Options Granted On and After May 25, 2000. In the
case of an incentive stock option granted on or after May 25, 2000, the
following additional provisions shall apply:

                  (i)      Disposition of Business. In the case of a termination
                           resulting from the disposition by the Company or any
                           of its Subsidiaries of all or a part of its interest
                           in, or the discontinuance of a business of, a
                           subsidiary, division or other business unit, unvested
                           options shall not be forfeited, but any holding
                           period required by Section 6(c) shall be satisfied in
                           accordance with its original schedule and the Option
                           shall expire, unless exercised, three (3) months
                           after the date of termination, but shall at the end
                           of such three month period become a non-qualified
                           option exercisable pursuant to the terms of Section 6
                           hereof (including Section 6(h)(iii), less the period
                           already elapsed hereunder);

                  (ii)     Force Reduction Program. In the case of a termination
                           (other than retirement) resulting from a force
                           reduction program instituted by the Company or any of
                           its Subsidiaries, unvested options shall not be
                           forfeited but any holding period required by Section
                           6(c) shall be satisfied in accordance with its
                           original schedule, and the Option shall expire,
                           unless exercised, three (3) months after the date of
                           termination, but shall at the end of such three (3)
                           month period become a non-qualified option
                           exercisable pursuant to the terms of Section 6 hereof
                           (including Section 6(h)(iv), less the period already
                           elapsed hereunder).

         e. Additional Provisions Regarding Certain Incentive Stock Options
Granted Before May 25, 2000. In the case of an incentive stock option granted
before May 25, 2000, the following additional provisions shall apply:

                                      -8-
<PAGE>   9

                  (i)      Disposition of Business. In the case of incentive
                           stock options granted after September 24, 1998 and
                           before May 25, 2000, in the event that a termination
                           results from the disposition by the Company of all or
                           a part of its interest in, or the discontinuance of
                           the business of, a subsidiary, division or other
                           business unit of the Company, the Committee may
                           extend the period during which an incentive stock
                           option may be exercised as a non-qualified option to
                           up to five (5) years from the date of such
                           termination.

                  (ii)     Other Terminations. In the case of incentive stock
                           options granted after April 24, 1997 and before May
                           25, 2000, the Committee may extend the period during
                           which an incentive stock option may be exercised as a
                           non-qualified stock option to up to three (3) years
                           from the date of a termination not due to retirement,
                           disability or gross misconduct or, if later, three
                           (3) years from the date the option becomes
                           exercisable but not more than five years after the
                           date of such termination.

         f. Death of Optionee. Upon the death of an Optionee during his or her
period of employment, the incentive stock option shall be exercisable as an
incentive stock option only as to those shares of Common Stock which were
subject to the exercise of such option at the time of death, provided that (i)
any holding period required by Section 6(c) shall automatically be deemed to be
satisfied, and (ii) the Committee may determine that particular limitations and
restrictions under the Plan shall not apply, and such option shall expire,
unless exercised by the Optionee's legal representatives or heirs, five (5)
years after the date of death (unless the Committee shall provide for a shorter
period at the time the option is granted).

         g. Leave of Absence. A leave of absence, whether or not an Approved
Leave of Absence, shall be deemed a termination of employment for purposes of
Section 8.

In no event, however, shall any incentive stock option be exercisable pursuant
to Sections 8(c) or (d) subsequent to the tenth anniversary of the date on which
it was granted.

9.       TERMS AND CONDITIONS OF AWARDS OF RETENTION STOCK

         a. General. Retention Shares may be granted only to reward the
attainment of individual, Company or Subsidiary goals, or to attract or retain
officers or other employees of the Company or any Subsidiary, and shall be
granted subject to the attainment of performance goals unless the Committee
shall determine otherwise. With respect to each grant of Retention Shares under
the Plan, the Committee shall determine the period or periods, including any
conditions for determining such period or periods, during which the restrictions
set forth in Section 9(b) shall apply, provided that in no event, other than as
provided in Section 9(c) or in the next sentence, shall such restrictions
terminate prior to 3 years after the date of grant (the "Restriction Period"),
and may also specify any other terms or conditions to the right of the
Participant to receive such Retention Shares ("Vesting Conditions"). The
Committee may determine in its sole discretion to waive any or all of such
restrictions prior to end of the Restriction Period or the satisfaction of any
Vesting Condition. Subject to Section 9(c) and any such Vesting Condition, a
grant of Retention Shares shall be effective for the Restriction Period and may
not be revoked.

         b. Restrictions. At the time of grant of Retention Shares to a
Participant, a certificate representing the number of shares of Common Stock
granted shall be registered in the Participant's name but shall be held by the
Company for his or her account. The Participant shall have the entire beneficial
ownership interest in, and all rights and privileges of a stockholder as to,
such Retention Shares, including the right to vote

                                      -9-
<PAGE>   10

such Retention Shares and, unless the Committee shall determine otherwise, the
right to receive dividends thereon, subject to the following: (i) subject to
Section 9(c), the Participant shall not be entitled to delivery of the stock
certificate until the expiration of the Restriction Period and the satisfaction
of any Vesting Conditions; (ii) none of the Retention Shares may be sold,
transferred, assigned, pledged, or otherwise encumbered or disposed of during
the Restriction Period or prior to the satisfaction of any Vesting Conditions;
and (iii) all of the Retention Shares shall be forfeited and all rights of the
Participant to such Retention Shares shall terminate without further obligation
on the part of the Company unless the Participant remains in the continuous
employment of the Company or a Subsidiary for the entire Restriction Period,
except as provided by Sections 9(a) and 9(c), and any applicable Vesting
Conditions have been satisfied. Any shares of Common Stock or other securities
or property received as a result of a transaction listed in Section 13 shall be
subject to the same restrictions as such Retention Shares unless the Committee
shall determine otherwise.

         c.       Termination of Employment.

                  (i)      Disability and Retirement. Unless the Committee shall
                           determine otherwise at the time of grant of Retention
                           Shares, if (A) a Participant ceases to be an employee
                           of the Company or a Subsidiary prior to the end of a
                           Restriction Period, by reason of disability under the
                           provisions of the Company's or a Subsidiary's
                           long-term disability plan or retirement under the
                           provisions of the Company's or a Subsidiary's pension
                           plan either (i) at age 65 or (ii) prior to age 65 at
                           the request of the Company or a Subsidiary, and (B)
                           all Vesting Conditions have been satisfied, the
                           Retention Shares granted to such Participant shall
                           immediately vest and all restrictions applicable to
                           such shares shall lapse. A certificate for such
                           shares shall be delivered to the Participant in
                           accordance with the provisions of Section 9(d).

                  (ii)     Death. Unless the Committee shall determine otherwise
                           at the time of grant of Retention Shares, if (A) a
                           Participant ceases to be an employee of the Company
                           or a Subsidiary prior to the end of a Restriction
                           Period by reason of death, and (B) all Vesting
                           Conditions have been satisfied, the Retention Shares
                           granted to such Participant shall immediately vest in
                           his or her Beneficiary, and all restrictions
                           applicable to such shares shall lapse. A certificate
                           for such shares shall be delivered to the
                           Participant's Beneficiary in accordance with the
                           provisions of Section 9(d).

                  (iii)    All Other Terminations. If a Participant ceases to be
                           an employee of the Company or a Subsidiary prior to
                           the end of a Restriction Period for any reason other
                           than death, disability or retirement as provided in
                           Section 9(c)(i) and (ii), the Participant shall
                           immediately forfeit all Retention Shares then subject
                           to the restrictions of Section 9(b) in accordance
                           with the provisions thereof, except that the
                           Committee may, if it finds that the circumstances in
                           the particular case so warrant, allow a Participant
                           whose employment has so terminated to retain any or
                           all of the Retention Shares then subject to the
                           restrictions of Section 9(b) and all restrictions
                           applicable to such retained shares shall lapse. A
                           certificate for such retained shares shall be
                           delivered to the Participant in accordance with the
                           provisions of Section 9(d).

                  (iv)     Vesting Conditions. Unless the Committee shall
                           determine otherwise at the time of grant of Retention
                           Shares, if a Participant ceases to be an employee of

                                      -10-
<PAGE>   11

                           the Company for any reason prior to the satisfaction
                           of any Vesting Conditions, the Participant shall
                           immediately forfeit all Retention Shares then subject
                           to the restrictions of Section 9(b) in accordance
                           with the provisions thereof, except that the
                           Committee may, if it finds that the circumstances in
                           the particular case so warrant, allow a Participant
                           whose employment has so terminated to retain any or
                           all of the Retention Shares then subject to the
                           restrictions of Section 9(b) and all restrictions
                           applicable to such retained shares shall lapse. A
                           certificate for such retained shares shall be
                           delivered to the Participant in accordance with the
                           provisions of Section 9(d).

         d. Payment of Retention Shares. At the end of the Restriction Period
and after all Vesting Conditions have been satisfied, or at such earlier time as
provided for in Section 9(c) or as the Committee, in its sole discretion, may
otherwise determine, all restrictions applicable to the Retention Shares shall
lapse, and a stock certificate for a number of shares of Common Stock equal to
the number of Retention Shares, free of all restrictions, shall be delivered to
the Participant or his or her Beneficiary, as the case may be. If an amount is
payable by a Participant to the Company or a Subsidiary under applicable
withholding tax laws in connection with the lapse of such restrictions, the
Committee, in its sole discretion, may permit the Participant to make such
payment, in whole or in part, by authorizing the Company to transfer to the
Company Retention Shares otherwise deliverable to the Participant having a fair
market value equal to the amount to be paid under such withholding tax laws.

         e. Deferral. The Committee may permit a Participant to elect to defer
receipt of all or part of any Retention Shares that would otherwise be
delivered, pursuant to rules and regulations adopted by the Committee. The
Committee may permit the payment of cash in lieu of Common Stock upon payment of
the deferred amount.

10.      STOCK UNITS

         The Committee may also grant Awards of Stock Units under the Plan. The
vesting of Awards of Stock Units shall be subject to the requirement that a
Participant continue employment with the Company or a Subsidiary for a certain
period of no less than three years (the "Unit Restriction Period"), and may be
subject to the satisfaction of other conditions or contingencies ("Unit Vesting
Condition"), in order for a Participant to receive payment of such Award, as
established by the Committee at the time of the Award. The Committee may
determine in its sole discretion to waive any such requirement, condition or
contingency. Awards of Stock Units shall be payable in shares of Common Stock.
The Committee may permit a Participant to elect to defer receipt of payment of
all or part of any Award of Stock Units pursuant to rules and regulations
adopted by the Committee. Unless the Committee provides otherwise at the time an
Award of Stock Units to a Participant is made, the provisions of Section 9(c) of
the Plan relating to the vesting and forfeiture of Retention Stock upon
termination of employment shall apply to any termination of employment by such
Participant during the Unit Restricted Period or prior to the satisfaction of
any Unit Vesting Condition for such Award.

11.      DIVIDENDS AND DIVIDEND EQUIVALENTS

         Any Option or Award of Stock Units may provide the Participant with the
right to receive dividend payments or dividend equivalent payments on the Common
Stock subject to the Option or Award, whether or

                                      -11-
<PAGE>   12

not such Option or Award has been exercised or is vested. Such payments may be
made in cash or may be credited to a Participant's account and later settled in
cash or Common Stock or a combination thereof, as determined by the Committee.
Such payments and credits may be subject to such conditions and contingencies as
the Committee may establish.

12.      REGULATORY APPROVALS AND LISTING

         The Company shall not be required to issue to an Optionee, Participant
or a Beneficiary, as the case may be, any certificate for any shares of Common
Stock upon exercise of an option or for any Retention Shares granted under the
Plan or to make any payment with respect to any Stock Unit granted under the
Plan prior to (i) the obtaining of any approval from any governmental agency
which the Company, in its sole discretion, shall determine to be necessary or
advisable, (ii) the admission of such shares to listing on any stock exchange on
which the Common Stock may then be listed, and (iii) the completion of any
registration or other qualification of such shares or units under any state or
federal law or rulings or regulations of any governmental body which the
Company, in its sole discretion, shall determine to be necessary or advisable.

13.      ADJUSTMENT IN EVENT OF CHANGES IN CAPITALIZATION

         In the event of a recapitalization, stock split, stock dividend,
combination or exchange of shares, merger, consolidation, rights offering,
separation, spin-off, reorganization or liquidation, or any other change in the
corporate structure or shares of the Company, the Board, upon recommendation of
the Committee, may make such equitable adjustments as it may deem appropriate in
the number and kind of shares and Stock Units authorized by the Plan, in the
option price of outstanding Options, and in the number and kind of shares, Stock
Units or other securities or property subject to Options or covered by
outstanding Awards.

14.      TERM OF THE PLAN

         No Options, or Retention Shares or Stock Units shall be granted
pursuant to the Plan after April 16, 2003, but grants of Options, or Retention
Shares or Stock Units theretofore granted may extend beyond that date and the
terms and conditions of the Plan shall continue to apply thereto.

15.      TERMINATION OR AMENDMENT OF THE PLAN

         The Board may at any time terminate the Plan with respect to any shares
of Common Stock or Stock Units not at that time subject to outstanding Options
or Awards, and may from time to time alter or amend the Plan or any part thereof
(including, but without limiting the generality of the foregoing, any amendment
deemed necessary to ensure that the Company may obtain any approval referred to
in Section 12 or to ensure that the grant of Options or Awards, the exercise of
Options, the payment of Retention Shares or the payment with respect to Stock
Units or any other provision of the Plan complies with Section 16(b) of the
Act), provided that no change with respect to any Options, Retention Shares or
Stock Units theretofore granted may be made which would impair the rights of an
Optionee or Participant without the consent of such Optionee or Participant and,
further, that without the approval of stockholders, no alteration or amendment
may be made which would (i) increase the maximum number of shares of Common
Stock and Stock Units subject to the Plan as set forth in Section 5 (except by
operation of Section 13), (ii) extend the term of the Plan or (iii) change the
class of eligible persons who may receive Options or Awards of Retention Shares
or Stock Units under the Plan. The Committee may amend the Plan to extend the
exercise period following an optionee's termination of an option granted prior
to September 24, 1998, but not beyond: (i) in the case of a termination
resulting from the

                                      -12-
<PAGE>   13

disposition by the Company of all or a part of its interest in, or the
discontinuance of the business of, a subsidiary, division or other business unit
of the Company, five years from the date of termination and (ii) in the case of
all other terminations, not more than three years from the date of termination,
or, if later, three years from the date the option becomes exercisable, but not
more than five years after the date of such termination.

16.      LEAVE OF ABSENCE

         Unless the Committee shall determine otherwise, a leave of absence
other than an Approved Leave of Absence shall be deemed a termination of
employment for purposes of the Plan. An Approved Leave of Absence shall not be
deemed a termination of employment for purposes of the Plan (except for purposes
of Section 8), but the period of such Leave of Absence shall not be counted
toward satisfaction of any Restriction Period or Unit Restriction Period or any
holding period described in Section 6(c).

17.      GENERAL PROVISIONS

         a. Neither the Plan nor the grant of any Option or Award nor any action
by the Company, any Subsidiary or the Committee shall be held or construed to
confer upon any person any right to be continued in the employ of the Company or
a Subsidiary. The Company and each Subsidiary expressly reserve the right to
discharge, without liability but subject to his or her rights under the Plan,
any Optionee or Participant whenever in the sole discretion of the Company or a
Subsidiary, as the case may be, its interest may so require.

         b. All questions pertaining to the construction, regulation, validity
and effect of the Plan shall be determined in accordance with the laws of the
State of Utah, without regard to conflict of laws doctrine.

18.      EFFECTIVE DATE

         The Plan shall become effective upon approval of the stockholders of
the Company.

                                      -13-

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