Document:

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                                                                   EXHIBIT 10.49

                           Enron North America Corp.
                               1400 Smith Street
                             Houston, Texas 77002

                               February 10, 2000

FirstWorld Communications, Inc.
Attn: Mr. Jeffrey Dykes
8390 E. Crescent Parkway, Suite 300
Greenwood Village, CO 80111

Colorado Spectra 1, L.L.C.
Colorado Spectra 2, L.L.C.
Colorado Spectra 3, L.L.C.
Colorado Spectra 4, L.L.C.
Attn: Donald Sturm
3033 East First Avenue, Suite 200
Denver, Colorado 80206

TPG Partners  III L.P.
T3 Partners L.P.
Colony Investors IV L.P.
Attn: Rick Ekelbery
c/o Texas Pacific Group
201 Main Street
Suite 2420
Fort Worth TX 76102

          Re: Assignment of Rights, Assumption of Obligations and Termination of
Rights of Enron North America Corp. (formerly Enron Capital & Trade Resources
Corp.) (together with all its affiliates, "ENA"), Nina I, L.L.C., ECT Merchant
Investments Corp. and Sundance Assets, L.P. (together with ENA, the "Enron
Entities") with respect to the Amended and Restated Investor Rights Agreement
(the "Agreement"), dated as of April 13, 1998, as amended, among the Enron
Entities, FirstWorld Communications, Inc. (formerly SpectraNet International)
("FirstWorld"), Colorado Spectra 1, L.L.C., Colorado Spectra 2, L.L.C., Colorado
Spectra 3, L.L.C., Colorado Spectra 4, LLC (collectively, the "Sturm Entities"),
and the other individuals and entities signatory thereto

Gentlemen:

          This letter will evidence the agreement of the parties, in accordance
with Section 5.5 of the Agreement, to (1) the assignment of certain rights by
the Enron Entities and the substitution of TPG Partners III L.P., T3 Partners
L.P. and Colony Investors IV, L.P., each a Delaware limited
<PAGE>

partnership, (collectively, the "Purchasers") for the Enron Entities with
respect to certain rights and obligations set forth in the Agreement; (2) the
adoption of the Agreement by the Purchasers; and (3) the termination of certain
rights of the Enron Entities under the Agreement.

          1.  Assignment.  Effective upon the closing of the sale of  FirstWorld
              ----------
securities held by ENA to the Purchasers pursuant to the Stock Purchase
Agreement dated as of February 10, 2000 by and between ENA and ECT Merchant
Investment Corp. and the Purchasers (the "Closing Date"), the Enron Entities
hereby assign to the Purchasers the following rights under the Investor Rights
Agreement:  (a) their rights to register "Registrable Securities," as defined in
the Agreement, pursuant to Section 2 of the Agreement with respect to the
FirstWorld securities transferred to each of the Purchasers by the Enron
Entities upon the Closing; (the Enron Entities will retain their registration
rights with respect to the FirstWorld securities retained by the Enron Entities
after the Closing (the "Retained Securities"), (b) their rights of first refusal
under Section 4 of the Agreement, and (c) rights to FirstWorld information under
Section 3 of the Agreement; (the Enron Entities will retain such rights with
respect to the Retained Securities).  FirstWorld acknowledges and agrees that
the requirements of clause (A) of the proviso to Section 2.10 have been
satisfied.  The Sturm Entities and FirstWorld hereby acknowledge and agree that
all requirements of the Agreement for the assignment of the rights described
herein have been met and that this letter agreement is effective to assign such
rights.

          The parties hereto further consent to the amendment of the Agreement
pursuant to Section 5.5(a), effective upon the Closing, by replacing each
reference to "Enron" with a reference to "TPG III Partners, L.P." in Sections
2.11, 2.12, 5.5(a) and 5.5(b).

          2.  Adoption.  Pursuant to Section 2.1(a)(ii)(A) and clause (B) of the
              --------
proviso to Section 2.10 of the Agreement, each of the Purchasers hereby agrees
to be bound by the terms of, and subject to all of the restrictions set forth
in, the Agreement.  FirstWorld and the Sturm Entities hereby acknowledge
satisfaction of the requirements of Section 2.1(a)(ii)(B) with respect to ENA's
sale to the Purchasers.

          3.  Termination of Rights.  All remaining rights and obligations of
              ---------------------
the Enron Entities under the Agreement, including the registration rights under
Section 2 with respect to the Retained Securities, will terminate upon the later
to occur of: (i) the Closing and (ii) the consummation of an offering of the
FirstWorld Series B Common Stock registered pursuant to the Securities Act of
1933, as amended, and the listing of the Series B Common Stock for trading on
the New York Stock Exchange or quotation on the Nasdaq National Market.
Notwithstanding the foregoing, the rights of the Enron Entities under Section 4
of the Agreement shall terminate upon the Closing.

          4.  Assignees.  If any of the Purchasers assigns any of its rights to
              ---------
purchase FirstWorld securities from any of the Enron Entities, the Purchaser
shall require the assignee to become a party to the Agreement and this letter
agreement by agreeing in writing to be bound by all the terms of both
agreements. Notwithstanding anything contained in the Agreement to the contrary,

                                      -2-
<PAGE>

FirstWorld and the Sturm Entities agree that so long as the assignee is an
affiliate of one of the Purchasers no notice or information disclosure is
required to permit the assignee to become a party to the agreements.

          5.  Consent.  The Purchasers and the Enron Entities acknowledge and
              -------
agree that the Enron Entities have previously consented under Section 5.5 of the
Agreement to an amendment to the Agreement which provides Lucent Technologies,
SAIC Venture Capital Corp. and Microsoft Corporation with S-3, demand and
piggyback registration rights.  In addition, the Purchasers and the Enron
Entities hereby consent to an amendment to the Agreement to provide TPG
FirstWorld I, LLC with identical demand, S-3 and piggyback rights with respect
to the shares of  Series B common  stock of  FirstWorld purchased by TPG
FirstWorld I, LLC in a private placement which will close concurrently with
FirstWorld's IPO.

          6.  Notice for the Purchasers.  Pursuant to Section 2.10 of the
              -------------------------
Agreement, the address for each of the Purchasers is as provided on the first
page hereto.

                          (Signature pages to follow)

                                     -2A-
<PAGE>

          Please evidence your agreement with the foregoing by signing this
letter and the enclosed duplicate counterparts in the space provided below and
returning one copy to ENA, attention: Anne Koehler at the address provided
above.

                                    Very truly yours,

                                    ENRON NORTH AMERICA CORP.

                                    By:_______________________________________
                                    Name:_____________________________________
                                    Title:____________________________________

                                    SUNDANCE PARTNERS, L.P.

                                    By:_______________________________________
                                    Name:_____________________________________
                                    Title:____________________________________

                                    NINA I, LLC

                                    By:_______________________________________
                                    Name:_____________________________________
                                    Title:____________________________________

                                    ECT MERCHANT INVESTMENTS CORP.

                                    By:_______________________________________
                                    Name:_____________________________________
                                    Title:____________________________________

                                      -4-
<PAGE>

AGREED TO AND ACCEPTED
this 10th day of February, 2000.

FIRSTWORLD COMMUNICATIONS, INC.               COLORADO SPECTRA 4, L.L.C.

By:______________________________             By:______________________________
Name:_________________                        Name:_________________
Title:___________________________             Title:___________________________

COLORADO SPECTRA 1, L.L.C.                    TPG PARTNERS III L.P.

By:______________________________             By:______________________________
Name:_________________                        Name:_________________
Title:___________________________             Title:___________________________

COLORADO SPECTRA 2, L.L.C.                    T3 PARTNERS L.P.

By:______________________________             By:______________________________
Name:_________________                        Name:_________________
Title:___________________________             Title:___________________________

COLORADO SPECTRA 3, L.L.C.                    COLONY INVESTORS IV L.P.

By:______________________________             By:______________________________
Name:_________________                        Name:_________________
Title:___________________________             Title:___________________________

                                      -5-<PAGE>

                                                                   EXHIBIT 10.50

                        FIRSTWORLD COMMUNICATIONS, INC.
                       1999 EMPLOYEE STOCK PURCHASE PLAN

                           Adopted December 22, 1999
            Effective Date:  [Date of the Initial Public Offering]

1.      Purpose.

        (a)  The purpose of this 1999 Employee Stock Purchase Plan (the "Plan")
is to provide a means by which employees of FirstWorld Communications, Inc., a
Delaware corporation (the "Company"), and its Affiliates, as defined in
subparagraph 1(b), which are designated as provided in subparagraph 2(b), may be
given an opportunity to purchase stock of the Company.

        (b)  The word "Affiliate" as used in the Plan means any parent
corporation or subsidiary corporation of the Company, as those terms are defined
in Sections 424(e) and (f), respectively, of the Internal Revenue Code of 1986,
as amended (the "Code").

        (c)  The Company, by means of the Plan, seeks to retain the services of
its employees, to secure and retain the services of new employees, and to
provide incentives for such persons to exert maximum efforts for the success of
the Company.

        (d)  The Company intends that the rights to purchase stock of the
Company granted under the Plan be considered options issued under an "employee
stock purchase plan" as that term is defined in Section 423(b) of the Code.

2.      Administration.

        (a)  The Plan shall be administered by the Board of Directors (the
"Board") of the Company unless and until the Board delegates administration to a
committee as provided in subparagraph 2(c). Whether or not the Board has
delegated administration the Board shall have the final power to determine all
questions of policy and expediency that may arise in the administration of the
Plan.

        (b)  The Board shall have the power, subject to, and within the
limitations of, the express provisions of the Plan:

             (i)   To determine when and how rights to purchase stock of the
Company shall be granted and the provisions of each offering of such rights
(which need not be identical).

             (ii)  To designate from time to time which Affiliates of the
Company shall be eligible to participate in the Plan.

             (iii) To construe and interpret the Plan and rights granted under
it, and to establish, amend and revoke rules and regulations for its
administration. The Board, in the

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exercise of this power, may correct any defect, omission or inconsistency in the
Plan, in a manner and to the extent it shall deem necessary or expedient to make
the Plan fully effective.

             (iv) To amend the Plan as provided in paragraph 13.

             (v)  Generally, to exercise such powers and to perform such acts as
the Board or the Committee deems necessary or expedient to promote the best
interests of the Company and its Affiliates and to carry out the intent that the
Plan be treated as an "employee stock purchase plan" within the meaning of
Section 423 of the Code.

        (c)  The Board may delegate administration of the Plan to a committee
composed of not fewer than two (2) members of the Board (the "Committee"). If
administration is delegated to a Committee, the Committee shall have, in
connection with the administration of the Plan, the powers theretofore possessed
by the Board, subject, however, to such resolutions, not inconsistent with the
provisions of the Plan, as may be adopted from time to time by the Board. The
Board may abolish the Committee at any time and revest in the Board the
administration of the Plan.

3.      Shares Subject to the Plan.

        (a)  Subject to the provisions of paragraph 12 relating to adjustments
upon changes in stock, the stock that may be sold pursuant to rights granted
under the Plan shall not exceed in the aggregate one million (1,000,000) shares
of the Company's Series B common stock (the "Common Stock"). If any right
granted under the Plan shall for any reason terminate without having been
exercised, the Common Stock not purchased under such right shall again become
available for the Plan.

        (b)  The stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise.

4.      Grant of Rights; Offering.

        (a)  The Board or the Committee may from time to time grant or provide
for the grant of rights to purchase Common Stock of the Company under the Plan
to eligible employees (an "Offering") on a date or dates (the "Offering
Date(s)") selected by the Board or the Committee. Each Offering shall be in such
form and shall contain such terms and conditions as the Board or the Committee
shall deem appropriate, which shall comply with the requirements of Section
423(b)(5) of the Code that all employees granted rights to purchase stock under
the Plan shall have the same rights and privileges. The terms and conditions of
an Offering shall be incorporated by reference into the Plan and treated as part
of the Plan. The provisions of separate Offerings need not be identical, but
each Offering shall include (through incorporation of the provisions of this
Plan by reference in the document comprising the Offering or otherwise) the
period during which the Offering shall be effective, which period shall not
exceed twenty-seven (27) months beginning with the Offering Date, and the
substance of the provisions contained in paragraphs 5 through 8, inclusive.

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        (b)  If an employee has more than one right outstanding under the Plan,
unless he or she otherwise indicates in agreements or notices delivered
hereunder: (1) each agreement or notice delivered by that employee will be
deemed to apply to all of his or her rights under the Plan, and (2) a right with
a lower exercise price (or an earlier-granted right, if two rights have
identical exercise prices), will be exercised to the fullest possible extent
before a right with a higher exercise price (or a later-granted right, if two
rights have identical exercise prices) will be exercised.

5.  Eligibility.

        (a)  Rights may be granted only to employees of the Company or, as the
Board or the Committee may designate as provided in subparagraph 2(b), to
employees of any Affiliate of the Company. Except as provided in subparagraph
5(b), an employee of the Company or any Affiliate shall not be eligible to be
granted rights under the Plan unless, on the Offering Date, such employee has
been in the employ of the Company or any Affiliate for such continuous period
preceding such grant as the Board or the Committee may require, but in no event
shall the required period of continuous employment be equal to or greater than
two (2) years. In addition, unless otherwise determined by the Board or the
Committee and set forth in the terms of the applicable Offering, no employee of
the Company or any Affiliate shall be eligible to be granted rights under the
Plan unless, on the Offering Date, such employee's customary employment with the
Company or such Affiliate is for at least twenty (20) hours per week and at
least five (5) months per calendar year.

        (b)  The Board or the Committee may provide that each person who, during
the course of an Offering, first becomes an eligible employee of the Company or
designated Affiliate will, on a date or dates specified in the Offering which
coincides with the day on which such person becomes an eligible employee or
occurs thereafter, receive a right under that Offering, which right shall
thereafter be deemed to be a part of that Offering. Such right shall have the
same characteristics as any rights originally granted under that Offering, as
described herein, except that:

             (i)   the date on which such right is granted shall be the
"Offering Date" of such right for all purposes, including determination of the
exercise price of such right ;

             (ii)  the period of the Offering with respect to such right shall
begin on its Offering Date and end coincident with the end of such Offering; and

             (iii) the Board or the Committee may provide that if such person
first becomes an eligible employee within a specified period of time before the
end of the Offering, he or she will not receive any right under that Offering.

        (c)  No employee shall be eligible for the grant of any rights under the
Plan if, immediately after any such rights are granted, such employee owns stock
possessing five percent (5%) or more of the total combined voting power or value
of all classes of stock of the Company or of any Affiliate. For purposes of this
subparagraph 5(c), the rules of Section 424(d) of the Code shall apply in
determining the stock ownership of any employee, and stock which such

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employee may purchase under all outstanding rights and options shall be treated
as stock owned by such employee.

        (d)  An eligible employee may be granted rights under the Plan only if
such rights, together with any other rights granted under "employee stock
purchase plans" of the Company and any Affiliates, as specified by Section
423(b)(8) of the Code, do not permit such employee's rights to purchase stock of
the Company or any Affiliate to accrue at a rate which exceeds twenty-five
thousand dollars ($25,000) of fair market value of such stock (determined at the
time such rights are granted) for each calendar year in which such rights are
outstanding at any time.

        (e) Officers of the Company and any designated Affiliate shall be
eligible to participate in Offerings under the Plan, provided, however, that the
Board or the Committee may provide in an Offering that certain employees who are
highly compensated employees within the meaning of Section 423(b)(4)(D) of the
Code shall not be eligible to participate.

6.      Rights; Purchase Price.

        (a)  On each Offering Date, each eligible employee, pursuant to an
Offering made under the Plan, shall be granted the right to purchase up to the
number of shares of Common Stock of the Company purchasable with a percentage
designated by the Board or the Committee not exceeding fifteen percent (15%) of
such employee's Earnings (as defined by the Board for each Offering) during the
period which begins on the Offering Date (or such later date as the Board or the
Committee determines for a particular Offering) and ends on the date stated in
the Offering, which date shall be no later than the end of the Offering. The
Board or the Committee shall establish one or more dates during an Offering (the
"Purchase Date(s)") on which rights granted under the Plan shall be exercised
and purchases of Common Stock carried out in accordance with such Offering.

        (b)  In connection with each Offering made under the Plan, the Board or
the Committee may specify a maximum number of shares that may be purchased by
any employee as well as a maximum aggregate number of shares that may be
purchased by all eligible employees pursuant to such Offering. In addition, in
connection with each Offering that contains more than one Purchase Date, the
Board or the Committee may specify a maximum aggregate number of shares which
may be purchased by all eligible employees on any given Purchase Date under the
Offering. If the aggregate purchase of shares upon exercise of rights granted
under the Offering would exceed any such maximum aggregate number, the Board or
the Committee shall make a pro rata allocation of the shares available in as
nearly a uniform manner as shall be practicable and as it shall deem to be
equitable.

        (c)  The purchase price of stock acquired pursuant to rights granted
under the Plan shall be not less than the lesser of:

             (i)   an amount equal to eighty-five percent (85%) of the fair
market value of the stock on the Offering Date; or

             (ii)  an amount equal to eighty-five percent (85%) of the fair
market value of the stock on the Purchase Date.

                                       4
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7.      Participation; Withdrawal; Termination.

        (a)  An eligible employee may become a participant in the Plan pursuant
to an Offering by delivering a participation agreement to the Company within the
time specified in the Offering, in such form as the Company provides. Each such
agreement shall authorize payroll deductions of up to the maximum percentage
specified by the Board or the Committee of such employee's Earnings (as defined
by the Board for each Offering) during the Offering. The payroll deductions made
for each participant shall be credited to an account for such participant under
the Plan and shall be deposited with the general funds of the Company. A
participant may reduce (including to zero) or increase such payroll deductions,
and an eligible employee may begin such payroll deductions, after the beginning
of any Offering only as provided for in the Offering. A participant may make
additional payments into his or her account only if specifically provided for in
the Offering and only if the participant has not had the maximum amount withheld
during the Offering.

        (b)  At any time during an Offering, a participant may terminate his or
her payroll deductions under the Plan and withdraw from the Offering by
delivering to the Company a notice of withdrawal in such form as the Company
provides. Such withdrawal may be elected at any time prior to the end of the
Offering except as provided by the Board or the Committee in the Offering. Upon
such withdrawal from the Offering by a participant, the Company shall distribute
to such participant all of his or her accumulated payroll deductions (reduced to
the extent, if any, such deductions have been used to acquire stock for the
participant) under the Offering, without interest, and such participant's right
to acquire Common Stock under that Offering shall be automatically terminated. A
participant's withdrawal from an Offering will have no effect upon such
participant's eligibility to participate in any other Offerings under the Plan
but such participant will be required to deliver a new participation agreement
in order to participate in subsequent Offerings under the Plan.

        (c)  Rights granted pursuant to any Offering under the Plan shall
terminate immediately upon cessation of a participant's employment with the
Company and any designated Affiliate, for any reason, and the Company shall
distribute to such terminated employee all of his or her accumulated payroll
deductions (reduced to the extent, if any, such deductions have been used to
acquire stock for the terminated employee), under the Offering, without
interest.

        (d)  Rights granted under the Plan shall not be transferable by a
participant other than by will or the laws of descent and distribution, or by a
beneficiary designation as provided in paragraph 14, and during a participant's
lifetime, shall be exercisable only by such participant.

8.      Exercise.

        (a)  On each date specified therefor in the relevant Offering ("Purchase
Date"), each participant's accumulated payroll deductions and any other
additional payments specifically provided for in the Offering (without any
increase for interest) will be applied to the purchase of whole shares of stock
of the Company, up to the maximum number of shares permitted pursuant to the
terms of the Plan and the applicable Offering, at the purchase price specified
in the Offering. Unless otherwise provided for in the applicable Offering, no
fractional shares shall be

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issued upon the exercise of rights granted under the Plan. The amount, if any,
of accumulated payroll deductions remaining in each participant's account after
the purchase of shares which is less than the amount required to purchase one
share of stock on the final Purchase Date of an Offering shall be held in each
such participant's account for the purchase of shares under the next Offering
under the Plan, unless such participant withdraws from such next Offering, as
provided in subparagraph 7(b), or is no longer eligible to be granted rights
under the Plan, as provided in paragraph 5, in which case such amount shall be
distributed to the participant after such final Purchase Date, without interest.
The amount, if any, of accumulated payroll deductions remaining in any
participant's account after the purchase of shares which is equal to the amount
required to purchase whole shares of Common Stock on the final Purchase Date of
an Offering shall be distributed in full to the participant after such Purchase
Date, without interest.

        (b)  No rights granted under the Plan may be exercised to any extent
unless the shares to be issued upon such exercise under the Plan (including
rights granted thereunder) are covered by an effective registration statement
pursuant to the Securities Act of 1933, as amended (the "Securities Act") and
the Plan is in material compliance with all applicable state, foreign and other
securities and other laws applicable to the Plan. If on a Purchase Date in any
Offering hereunder the Plan is not so registered or in such compliance, no
rights granted under the Plan or any Offering shall be exercised on such
Purchase Date, and the Purchase Date shall be delayed until the Plan is subject
to such an effective registration statement and such compliance, except that the
Purchase Date shall not be delayed more than twelve (12) months and the Purchase
Date shall in no event be more than twenty-seven (27) months from the Offering
Date. If on the Purchase Date of any Offering hereunder, as delayed to the
maximum extent permissible, the Plan is not registered and in such compliance,
no rights granted under the Plan or any Offering shall be exercised then all
payroll deductions accumulated during the Offering (reduced to the extent, if
any, such deductions have been used to acquire stock) shall be distributed to
the participants, without interest.

9.      Covenants of the Company.

        (a)  During the terms of the rights granted under the Plan, the Company
shall at all times make reasonable efforts to keep available the number of
shares of stock required to satisfy such rights, provided that this section
shall not require the Company to take any action that would result in adverse
tax, accounting or financial consequences to the Company.

        (b)  The Company shall seek to obtain from each federal, state, foreign
or other regulatory commission or agency having jurisdiction over the Plan such
authority as may be required to issue and sell shares of stock upon exercise of
the rights granted under the Plan. If, after reasonable efforts, the Company is
unable to obtain from any such regulatory commission or agency the authority
which counsel for the Company deems necessary for the lawful issuance and sale
of stock under the Plan, the Company shall be relieved from any liability for
failure to issue and sell stock upon exercise of such rights unless and until
such authority is obtained.

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10.     Use of Proceeds from Stock.

        Proceeds from the sale of stock to participants pursuant to rights
granted under the Plan shall constitute general funds of the Company.

11.     Rights as a Stockholder.

        A participant shall not be deemed to be the holder of, or to have any of
the rights of a holder with respect to, any shares subject to rights granted
under the Plan unless and until the participant's shares acquired upon exercise
of rights hereunder are recorded in the books of the Company (or its transfer
agent).

12.     Adjustments upon Changes in Stock.

        (a)  If any change is made in the stock subject to the Plan, or subject
to any rights granted under the Plan (through merger, consolidation,
reorganization, recapitalization, stock dividend, dividend in property other
than cash, stock split, liquidating dividend, combination of shares, exchange of
shares, change in corporate structure or other transaction not involving the
receipt of consideration by the Company), the Plan and outstanding rights will
be appropriately adjusted in the class(es) and maximum number of shares subject
to the Plan and the class(es) and number of shares and price per share of stock
subject to outstanding rights. Such adjustments shall be made by the Board or
the Committee, the determination of which shall be final, binding and
conclusive. (The conversion of any convertible securities of the Company shall
not be treated as a "transaction not involving the receipt of consideration by
the Company.")

        (b)  In the event of: (1) a dissolution or liquidation of the Company;
(2) a merger or consolidation in which the Company is not the surviving
corporation; (3) a reverse merger in which the Company is the surviving
corporation but the shares of Common Stock outstanding immediately preceding the
merger are converted by virtue of the merger into other property, whether in the
form of securities, cash or otherwise; or (4) the acquisition by any person,
entity or group within the meaning of Section 13(d) or 14(d) of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), or any comparable
successor provisions (excluding any employee benefit plan, or related trust,
sponsored or maintained by the Company or any Affiliate of the Company) of the
beneficial ownership (within the meaning of Rule 13d-3 promulgated under the
Exchange Act, or comparable successor rule) of securities of the Company
representing at least fifty percent (50%) of the combined voting power entitled
to vote in the election of directors, then, as determined by the Board in its
sole discretion (i) any surviving or acquiring corporation may assume
outstanding rights or substitute similar rights for those under the Plan, (ii)
such rights may continue in full force and effect, or (iii) participants'
accumulated payroll deductions may be used to purchase Common Stock immediately
prior to the transaction described above and the participants' rights under the
ongoing Offering terminated.

13.     Amendment of the Plan.

        (a)  The Board or the Committee at any time, and from time to time, may
amend the Plan. However, except as provided in paragraph 12 relating to
adjustments upon changes in stock, no amendment shall be effective unless
approved by the stockholders of the Company

                                       7
<PAGE>

within twelve (12) months before or after the adoption of the amendment if such
amendment requires stockholder approval in order for the Plan to obtain employee
stock purchase plan treatment under Section 423 of the Code or to comply with
the requirements of Rule 16b-3 promulgated under the Exchange Act.

        (b)  The Board or the Committee may amend the Plan in any respect the
Board or the Committee deems necessary or advisable to provide eligible
employees with the maximum benefits provided or to be provided under the
provisions of the Code and the regulations promulgated thereunder relating to
employee stock purchase plans and/or to bring the Plan and/or rights granted
under it into compliance therewith.

        (c)  Rights and obligations under any rights granted before amendment of
the Plan shall not be altered or impaired by any amendment of the Plan, except
with the consent of the person to whom such rights were granted, or except as
necessary to comply with any laws or governmental regulations, or except as
necessary to ensure that the Plan and/or rights granted under the Plan comply
with the requirements of Section 423 of the Code.

14.     Designation of Beneficiary.

        (a)  A participant may file a written designation of a beneficiary who
is to receive any shares and cash, if any, from the participant's account under
the Plan in the event of such participant's death subsequent to the end of an
Offering but prior to delivery to the participant of such shares and cash. In
addition, a participant may file a written designation of a beneficiary who is
to receive any cash from the participant's account under the Plan in the event
of such participant's death during an Offering.

        (b)  Such designation of beneficiary may be changed by the participant
at any time by written notice in the form prescribed by the Company. In the
event of the death of a participant and in the absence of a beneficiary validly
designated under the Plan who is living at the time of such participant's death,
the Company shall deliver such shares and/or cash to the executor or
administrator of the estate of the participant, or if no such executor or
administrator has been appointed (to the knowledge of the Company), the Company,
in its sole discretion, may deliver such shares and/or cash to the spouse or to
any one or more dependents or relatives of the participant, or if no spouse,
dependent or relative is known to the Company, then to such other person as the
Company may designate.

15.     Termination or Suspension of the Plan.

        (a)  The Board or the Committee in its discretion, may suspend or
terminate the Plan at any time. No rights may be granted under the Plan while
the Plan is suspended or after it is terminated.

        (b)  Rights and obligations under any rights granted while the Plan is
in effect shall not be altered or impaired by suspension or termination of the
Plan, except as expressly provided in the Plan or with the consent of the person
to whom such rights were granted, or except as necessary to comply with any laws
or governmental regulation, or except as necessary to ensure

                                       8
<PAGE>

that the Plan and/or rights granted under the Plan comply with the requirements
of Section 423 of the Code.

16.     Effective Date of Plan.

        The Plan shall become effective upon the effective date of the initial
public offering of the Common Stock of the Company (the "Effective Date"), but
no rights granted under the Plan shall be exercised unless and until the Plan
has been approved by the stockholders of the Company within twelve (12) months
before or after the date the Plan is adopted by the Board, which date may be
prior to the Effective Date.

                                       9

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