Document:

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                                                                    EXHIBIT 10.6

                                                           Draft of June 4, 2001

                CONTRIBUTION, ASSIGNMENT AND AMENDMENT AGREEMENT

     This CONTRIBUTION, ASSIGNMENT AND AMENDMENT AGREEMENT is made as of June 8,
2001, between Plains All American Inc., a Delaware corporation (the "DEPARTING
GP"), Plains AAP, L.P., a Delaware limited partnership (the "GP LP") and Plains
All American GP LLC, a Delaware limited liability company ("SUCCESSOR GP LLC").
Capitalized terms used and not otherwise defined herein shall have the
respective meanings ascribed to such terms in the Investor Agreements (as
defined below).

                                    RECITALS

          WHEREAS, the Departing GP has entered into a Unit Transfer and
Contribution Agreement, dated as of May 8, 2001, as amended (the "KAFU
AGREEMENT"), among Kafu Holdings, LLC, Plains Resources Inc. ("PARENT"), the
Departing GP and PAAI LLC ("SELLER");

          WHEREAS, the Departing GP has entered into a Unit Transfer and
Contribution Agreement, dated as of May 8, 2001 (the "SABLE AGREEMENT"), among
Sable Investments, L.P., Sable Holdings, L.P., James C. Flores, Parent, the
Departing GP and Seller;

          WHEREAS, the Departing GP has entered into a Unit Transfer and
Contribution Agreement, dated as of May 8, 2001, as amended (the "ENCAP
AGREEMENT"), among E-Holdings III, L.P., Parent, the Departing GP and Seller;

          WHEREAS, the Departing GP has entered into a Unit Transfer and
Contribution Agreement, dated as of June 8, 2001 ( the "RAYMOND AGREEMENT")
among John T. Raymond, Parent, the Departing GP and Seller;

          WHEREAS, the Departing GP has entered into a Unit Transfer and
Contribution Agreement, dated as of June 8, 2001 (the "STROME AGREEMENT") among
Mark E. Strome, Parent, the Departing GP and Seller;

          WHEREAS, the Departing GP has entered into a Unit Transfer and
Contribution Agreement, dated as of June 8, 2001 (the "STROME HEDGECAP FUND
AGREEMENT") among Strome Hedgecap Fund L.P., Parent, the Departing GP and
Seller;

          WHEREAS, the Departing GP has entered into a Contribution Agreement,
dated as of June 8, 2001 (the "MANAGEMENT ENTITY CONTRIBUTION AGREEMENT" and
together with the Kafu Agreement, the Sable Agreement, the EnCap Agreement, the
Raymond Agreement, the Strome Agreement and the Strome Hedgecap Fund Agreement,
the "INVESTOR AGREEMENTS") among PAA Management, L.P., Parent and the Departing
GP;

          WHEREAS, the Departing GP has agreed, as a condition to the closing of
the transactions contemplated by the Investor Agreements, to contribute the LLC
Incentive Distribution Rights to Successor GP LLC as its capital contribution as
a member of Successor GP LLC;

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          WHEREAS, Successor GP LLC has agreed, as a condition to the closing of
the transactions contemplated by the Investor Agreements, to contribute the LLC
Incentive Distribution Rights to the GP LP as its capital contribution as the
general partner of the GP LP;

          WHEREAS, the Departing GP has agreed, as a condition to the closing of
the transactions contemplated by the Investor Agreements, to contribute, among
other things, the GP Interest, the Operating Partnerships GP Interests and the
LP Incentive Distribution Rights to the GP LP as its capital contribution as the
GP LP's limited partner;

          WHEREAS, the GP LP desires to assume the rights and duties of the
general partner of Plains All American Pipeline, L.P. (the "PARTNERSHIP") and
the Operating Partnerships and to be bound by the provisions of the Second
Amended and Restated Agreement of Limited Partnership of the Partnership dated
as of November 23, 1998, as amended (the "PARTNERSHIP AGREEMENT"), and the
Operating Partnership Agreements; and

          WHEREAS, the GP LP desires to consent, pursuant to Section 10.2 of the
Partnership Agreement, to the admission of Sable Holdings, Raymond, Strome
Hedgecap, Strome, Kafu and E-Holdings as Substituted Limited Partners (as
defined in the Partnership Agreement) in the Partnership.

          NOW, THEREFORE, in consideration of the foregoing and the mutual
promises, representations, warranties, covenants and agreements contained
herein, the parties hereto, intending to be legally bound hereby, agree as
follows:

                                  ARTICLE I.
    CONTRIBUTIONS OF PARTNERSHIP INTERESTS AND INCENTIVE DISTRIBUTION RIGHTS

     1.1  Contribution by Departing GP to Successor GP LLC.  Departing GP hereby
grants, contributes, transfers and conveys to Successor GP LLC, its successors
and assigns, all right, title and interest in and to the LLC Incentive
Distribution Rights and Successor GP LLC hereby accepts the LLC Incentive
Distribution Rights as a contribution to the capital of Successor GP LLC.

     TO HAVE AND TO HOLD the LLC Incentive Distribution Rights unto Successor GP
LLC, its successors and assigns, together with all and singular the rights and
appurtenances thereto in anywise belonging, subject, however, to the terms and
conditions stated in this Agreement, forever.

     1.2  Contribution by Successor GP LLC to GP LP.  Successor GP LLC hereby
grants, contributes, transfers and conveys to GP LP, its successors and assigns,
all right, title and interest in and to the LLC Incentive Distribution Rights
and GP LP hereby accepts the LLC Incentive Distribution Rights as a contribution
to the capital of GP LP.

     TO HAVE AND TO HOLD the LLC Incentive Distribution Rights unto GP LP, its
successors and assigns, together with all and singular the rights and
appurtenances thereto in anywise belonging, subject, however, to the terms and
conditions stated in this Agreement, forever.

     1.3  Contribution by Departing GP to GP LP.  Departing GP hereby grants,
contributes, transfers and conveys to GP LP, its successors and assigns, all
right, title and interest in and to the LP Incentive Distribution Rights, the GP
Interest and the Operating Partnerships GP Interests and

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GP LP hereby accepts the LP Incentive Distribution Rights, the GP Interest and
the Operating Partnerships GP Interests as a contribution to the capital of GP
LP.

     TO HAVE AND TO HOLD the LP Incentive Distribution Rights, the GP Interest
and the Operating Partnerships GP Interests unto GP LP, its successors and
assigns, together with all and singular the rights and appurtenances thereto in
anywise belonging, subject, however, to the terms and conditions stated in this
Agreement, forever.

     The Partnership hereby acknowledges receipt of the opinion of counsel
required in Section 4.6(c) of the Partnership Agreement.

     1.4  Further Assurances.  From time to time after the date hereof, and
without any further consideration, Departing GP shall execute, acknowledge and
deliver all such additional assignments, stock powers, instruments, notices,
releases, acquittances and other documents, and will do all such other acts and
things, all in accordance with applicable law, as may be reasonably necessary or
appropriate more fully and effectively to assure GP LP and Successor GP LLC,
their respective successors and assigns, all of the properties, rights, titles,
interests, estates, remedies, powers and privileges by this Agreement granted to
GP LP and Successor GP LLC with respect to the LLC Incentive Distribution
Rights, the LP Incentive Distribution Rights, the GP Interest and the Operating
Partnerships GP Interests or which are intended so to be and to more fully and
effectively carry out the purposes and intent of this Agreement.

                                  ARTICLE II.
SUCCESSION OF GENERAL PARTNER OF THE PARTNERSHIP AND THE OPERATING PARTNERSHIPS

     2.1  Withdrawal of Departing GP as General Partner of Operating
Partnerships. Effective immediately prior to the contribution of the GP Interest
and the Operating Partnerships GP Interests pursuant to Section 1.3 and,
pursuant to Section 11.1(a)(ii) of each of the Partnership Agreement and the
Operating Partnership Agreements, Departing GP hereby withdraws as general
partner of the Partnership and the Operating Partnerships and proposes GP LP to
act and serve as sole general partner of the Partnership and the Operating
Partnerships.

     2.2  GP LP as Successor General Partner of the Partnership and the
Operating Partnerships. Effective immediately prior to the transfer to GP LP of
the GP Interest and the Operating Partnerships GP Interests pursuant to Section
1.3, GP LP accepts and agrees to duly and timely pay, perform and discharge the
rights, duties and obligations of the general partner of the Partnership and the
Operating Partnerships and all of the terms and conditions of the Partnership
Agreement and the Operating Partnership Agreements in accordance with Section
10.3 of the Partnership Agreement and Section 10.4 of the Operating Partnership
Agreements, and GP LP agrees to serve as general partner of the Partnership and
the Operating Partnerships and to be bound by the Partnership Agreement and the
Operating Partnership Agreements, as each is amended by this Agreement or as may
be further amended by the terms of the Partnership Agreement and the Operating
Partnership Agreements, as applicable, and GP LP is hereby admitted as the
successor general partner of the Partnership and the Operating Partnerships.

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                                 ARTICLE III.
           ASSUMPTION OF AND INDEMNIFICATION FOR CERTAIN LIABILITIES

     3.1  Assumption of Certain Liabilities and Obligations of Departing GP by
GP LP. In connection with the transfer of the GP Interest and the Operating
Partnerships GP Interests and the succession by GP LP as general partner of the
Partnership and the Operating Partnerships, GP LP hereby assumes and agrees to
duly and timely pay, perform and discharge all liabilities and obligations of
the Partnership and each Operating Partnership to the full extent (and only to
the extent) that Departing GP, as general partner, has been or would have been
in the future, were it not for the execution and delivery of this Agreement,
obligated to pay, perform and discharge such liabilities and obligations;
provided, however, that such assumption by GP LP is subject to the
indemnification provided in Section 3.2.

     3.2  Indemnification of GP LP and Successor GP LLC. Upon the transfer of
the GP Interest and the Operating Partnerships GP Interests to GP LP pursuant to
Section 1.3 hereof, Departing GP hereby indemnifies, defends and holds harmless
GP LP and Successor GP LLC from and against any and all claims, demands, costs,
liabilities and expenses (including court costs and reasonable attorneys' fees)
arising from or relating to any liability of GP LP or Successor GP LLC, whether
as general partner of the Partnership or an Operating Partnership or pursuant to
the assumption by GP LP and Successor GP LLC of liabilities and obligations of
the Partnership or an Operating Partnership pursuant to Section 3.1, for
liabilities of the Partnership and each Operating Partnership existing at the
time of the assignment of the GP Interest and the Operating Partnerships GP
Interests to GP LP pursuant to Section 1.3, but only to the extent that
Departing GP's share of such liabilities immediately prior to any assignment
under Section 1.3 exceeds Departing GP's federal income tax basis in its
aggregate partnership interest in the Operating Partnerships. For purposes of
this provision, liabilities shall mean only those shown on the balance sheet of
the Partnership and the Operating Partnerships as of the date of this Agreement.

                                  ARTICLE IV.
                      AMENDMENTS TO PARTNERSHIP AGREEMENT

     4.1  Amendments to the Partnership Agreement. In order to further the
purposes of this Agreement and to evidence the increased interest of the general
partner in the Partnership issued in exchange for the contributions to the
Partnership made pursuant to Section 2.1 hereof, Departing GP, as general
partner of the Partnership, having determined that the following amendments
would not materially adversely affect the limited partners of the Partnership or
have a material adverse effect on the holders of any class of the Partnership's
outstanding units, hereby exercises its rights and powers to amend the
Partnership Agreement without the approval of any limited partner or assignee
pursuant to Section 13.1(d)(i) of the Partnership Agreement and hereby approves
and adopts the following amendments to the Partnership Agreement in accordance
with Article XIII thereof:

          (a)  Section 1.1 is hereby amended by amending the definition of the
following term to read in its entirety as follows:

          "Conflicts Committee" means a committee of the Board of Directors of
     the general partner of the General Partner (or the applicable governing
     body of any successor to the General Partner) composed entirely of two or
     more directors who are neither security

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     holders, officers nor employees of the General Partner nor officers,
     directors or employees of any Affiliate of the General Partner.

          (b)  References in the Partnership Agreement to the Board of Directors
and officers of the General Partner are hereby amended to refer to the Board of
Directors (or the comparable governing body of any successor to the General
Partner) and officers (or the comparable governing officials of any successor to
the General Partner) of the general partner of the General Partner.

          (c)  Section 4.4(c) is hereby amended to read in its entirety as
follows:

               (c) Nothing contained in this Agreement shall be construed to
               prevent a disposition by any stockholder, member, partner or
               owner of the General Partner of any or all of the issued and
               outstanding stock, membership interests or partnership interests
               or other ownership interests of the General Partner.

       4.2  Restatement of Partnership Agreements.  Each of the partners of the
Partnership and the Operating Partnerships that is a party hereto agrees to
execute and deliver, within a reasonable period of time following the Closing
Date, a restated and amended version of each of the Partnership Agreement and
the Operating Partnership Agreements to which it is a party incorporating the
amendments to such agreement adopted by this Agreement together with such other
amendments intended to clarify the agreement as the general partner of such
limited partnership determines as are appropriate and not having a material
adverse effect on the limited partners of the partnership, and in the case of
the Partnership, the holders of outstanding common units therein.

                                  ARTICLE V.
              CONSENT TO ADMISSION OF SUBSTITUTED LIMITED PARTNERS

     GP LP hereby consents, pursuant to Section 10.2 of the Partnership
Agreement, to the admission of Sable Holdings, Raymond, Strome Hedgecap, Strome,
Kafu and E-Holdings as Substituted Limited Partners (as defined in the
Partnership Agreement) in the Partnership.  GP LP represents that as of the date
hereof such admissions have been reflected on the books and records of the
Partnership.

                                  ARTICLE VI.
                                 MISCELLANEOUS

     6.1  Other Assurances. From time to time after the date hereof, and without
any further consideration, each of the parties to this Agreement shall execute,
acknowledge and deliver all such additional instruments, notices and other
documents, and will do all such other acts and things, all in accordance with
applicable law, as may be necessary or appropriate to more fully and effectively
carry out the purposes and intent of this Agreement.

     6.2  Consents; Restriction on Assignment. If there are prohibitions against
or conditions to the contribution and assignment of one or more portions of the
assets contributed pursuant to

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Article II without the prior written consent of third parties, including,
without limitation, governmental agencies (other than consents of a ministerial
nature that are normally granted in the ordinary course of business), which if
not satisfied would result in a breach of such prohibitions or conditions or
would give an outside party the right to terminate the GP LP's rights with
respect to such portion of the contributed assets (herein called a
"Restriction"), then any provision contained in this Agreement to the contrary
notwithstanding, the transfer of title to or interest in each such portion of
the contributed assets (herein called the "Restriction-Asset") pursuant to this
Agreement shall not become effective unless and until such Restriction is
satisfied, waived or no longer applies. When and if such a Restriction is so
satisfied, waived or no longer applies, to the extent permitted by applicable
law and any applicable contractual provisions, the assignment of the
Restriction-Asset subject thereto shall become effective automatically, without
further action on the part of GP LP or Departing GP and Departing GP agrees to
use its reasonable best efforts to obtain satisfaction of any Restriction on a
timely basis. In the event that any Restriction-Asset exists, Departing GP
agrees to hold such Restriction-Asset in trust for the exclusive benefit of the
assignee or GP LP, as the case may be, and to otherwise use its reasonable best
efforts to provide the assignee with the benefits thereof, and Departing GP will
enter into other agreements, or take such other action as it may deem reasonably
necessary, in order to help ensure that such assignee is entitled to the
benefits of the contributed assets and concomitant rights in all material
respects.

     6.3  Costs. The Partnership shall pay all sales, use and similar taxes
arising out of the contributions, assignments and deliveries to be made
hereunder, and shall pay all documentary, filing, recording, transfer, deed, and
conveyance taxes and fees required in connection therewith. In addition, the
Partnership shall be responsible for all costs, liabilities and expenses
(including court costs and reasonable attorneys' fees) incurred in connection
with the satisfaction or waiver of any Restriction pursuant to Section 6.2.

     6.4  Headings; References; Interpretation. All Article and Section headings
in this Agreement are for convenience only and shall not be deemed to control or
affect the meaning or construction of any of the provisions hereof. The words
"hereof," "herein" and "hereunder" and words of similar import, when used in
this Agreement, shall refer to this Agreement as a whole, and not to any
particular provision of this Agreement. All references herein to Articles and
Sections shall, unless the context requires a different construction, be deemed
to be references to the Articles, and Sections of this Agreement, respectively.
All personal pronouns used in this Agreement, whether used in the masculine,
feminine or neuter gender, shall include all other genders, and the singular
shall include the plural and vice versa. The use herein of the word "including"
following any general statement, term or matter shall not be construed to limit
such statement, term or matter to the specific items or matters set forth
immediately following such word or to similar items or matters, whether or not
non-limiting language (such as "without limitation," "but not limited to," or
words of similar import) is used with reference thereto, but rather shall be
deemed to refer to all other items or matters that could reasonably fall within
the broadest possible scope of such general statement, term or matter.

     6.5  Successors and Assigns. The Agreement shall be binding upon and inure
to the benefit of the parties signatory hereto and their respective successors
and assigns.

     6.6  No Third Party Rights. The provisions of this Agreement are intended
to bind the parties signatory hereto as to each other and are not intended to
and do not create rights in any other

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person or confer upon any other person any benefits, rights or remedies and no
person is or is intended to be a third party beneficiary of any of the
provisions of this Agreement.

     6.7  Counterparts.  This Agreement may be executed in any number of
counterparts, all of which together shall constitute one agreement binding on
the parties hereto.

     6.8  Governing Law.  This Agreement shall be governed by, and construed in
accordance with, the laws of the State of Delaware applicable to contracts made
and to be performed wholly within such state without giving effect to conflict
of law principles thereof, except to the extent that it is mandatory that the
law of some other jurisdiction, wherein the contributed assets are deemed
located, shall apply.

     6.9  Severability. If any of the provisions of this Agreement are held by
any court of competent jurisdiction to contravene, or to be invalid under, the
laws of any political body having jurisdiction over the subject matter hereof,
such contravention or invalidity shall not invalidate the entire Agreement.
Instead, this Agreement shall be construed as if it did not contain the
particular provision or provisions held to be invalid, and an equitable
adjustment shall be made and necessary provision added so as to give effect to
the intention of the parties as expressed in this Agreement at the time of
execution of this Agreement.

     6.10  Assignment.  To the extent required by applicable law, this Agreement
shall also be an "assignment" of the assets transferred and contributed as set
forth in Article II hereof.

     6.11  Amendment or Modification. This Agreement may be amended or modified
from time to time only by the written agreement of all the parties hereto.

     6.12  Integration. This Agreement supersedes all previous understandings or
agreements between the parties, whether oral or written, with respect to its
subject matter. This document is an integrated agreement which contains the
entire understanding of the parties. No understanding, representation, promise
or agreement, whether oral or written, is intended to be or shall be included in
or form part of this Agreement unless it is contained in a written amendment
hereto executed by the parties hereto after the date of this Agreement.

                            [signature page follows]

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          IN WITNESS WHEREOF, this Agreement has been duly executed by the
parties hereto as of the date first above written.

                              PLAINS ALL AMERICAN INC., a Delaware corporation

                              By: /s/ Tim Moore
                                 --------------------------------
                              Name:  Tim Moore
                              Title: Vice President

                              PLAINS AAP, L.P., a Delaware limited partnership

                              By:  Plains All American GP LLC

                              By: /s/ Tim Moore
                                 --------------------------------
                              Name:  Tim Moore
                              Title: Vice President

                              PLAINS ALL AMERICAN GP LLC, a Delaware limited
                              liability company

                              By: /s/ Tim Moore
                                 --------------------------------
                              Name:  Tim Moore
                              Title: Vice President

                                       8<PAGE>
                                                                    EXHIBIT 10.7

                                                                  EXECUTION COPY

                         REGISTRATION RIGHTS AGREEMENT

     THIS REGISTRATION RIGHTS AGREEMENT is made as of May 8, 2001 (this
"AGREEMENT"), among Plains Resources Inc., a Delaware corporation (the
"ISSUER"), and James C. Flores ("FLORES", and together with his permitted
transferees, the "HOLDERS" and each a "HOLDER").

                              W I T N E S S E T H:

     WHEREAS, Flores and the Issuer have entered into an Employment Agreement
dated as of May 8, 2001 (the "EMPLOYMENT AGREEMENT").

     WHEREAS, Flores and the Issuer desire to enter into this Agreement in
connection with Flores' employment by the Issuer pursuant to the Employment
Agreement.

     NOW, THEREFORE, in consideration of the foregoing and the mutual promises,
representations, warranties, covenants and agreements contained herein, the
parties hereto, intending to be legally bound hereby, agree as follows:

                                   ARTICLE 1
                                  DEFINITIONS

           SECTION 1.1 DEFINITIONS. As used in this Agreement, the following
terms shall have the following respective meanings:

          "AFFILIATE" means, with respect to any specified Person, any other
Person that directly, or indirectly through one or more intermediaries,
controls, is controlled by, or is under common control with, such specified
Person.

          "BOARD" means the Issuer's board of directors.

          "COMMISSION" shall mean the Securities and Exchange Commission or any
successor governmental body or agency.

          "COMMON STOCK" means common stock, par value $0.10 per share, of the
Issuer.

          "DEMAND REGISTRATION" shall have the meaning ascribed thereto in
Section 2.1(a).

          "DEMAND REQUEST" shall have the meaning ascribed thereto in Section
2.1(a).

          "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
amended.

          "FORM S-3" means such form under the Securities Act as in effect on
the date hereof or any successor registration form under the Securities Act
subsequently adopted by the Commission which permits inclusion or incorporation
of substantial information by reference to other documents filed by the Issuer
with the Commission.
<PAGE>

          "LOSS" shall have the meaning ascribed thereto in Section 2.7(a).

          "PERSON" shall mean any natural person, firm, individual, business
trust, association, corporation, partnership, joint venture, company, limited
liability company, unincorporated entity or other entity.

          "REGISTRABLE SECURITIES" shall mean Common Stock at any time
beneficially owned by any Holder whether now owned or hereafter acquired,
including, without limitation, any stock or other securities into which or for
which such Common Stock may hereafter be changed, converted or exchanged and any
other stock or securities issued to Holders of such Common Stock (or such stock
or other securities into which or for which such stock is so changed, converted
or exchanged) upon any reclassification, combination, subdivision, dividend,
exchange, merger, consolidation or similar transaction or event.
Notwithstanding the foregoing, as to any particular Registrable Securities, such
Registrable Securities shall cease to be Registrable Securities as soon as (i)
such Registrable Securities have been sold or otherwise disposed of pursuant to
a registration statement that was filed with the Commission in accordance with
this Agreement and declared effective under the Securities Act, (ii) such
Registrable Securities shall have been otherwise sold, transferred or disposed
of by a Holder to any Person that is not a Holder, (iii) such Registrable
Securities have been sold in a transaction exempt from the Securities Act under
Section 4(1) thereof so that all transfer restrictions and restrictive legends
with respect thereto are removed upon the consummation of such sale, (iv) such
Registrable Securities are able to be sold pursuant to Rule 144(k); or (v) such
Registrable Securities are held by a Holder that does not "beneficially own"
more than 1% of the outstanding Common Stock and such Common Stock is able to be
sold under Rule 144 (other than Rule 144(k)).

          "REGISTRATION EXPENSES" shall mean any and all expenses incident to
performance of or compliance with any registration of securities pursuant to
Article 2, including, without limitation, (i) all expenses, including filing
fees, in connection with the preparation, printing and filing of one or more
registration statements hereunder; (ii) the fees, disbursements and expenses of
the Issuer's counsel and accountants (including in connection with the delivery
of opinions and/or comfort letters) in connection with this Agreement and the
performance of the Issuer's obligations hereunder; (iii) the reasonable fees,
disbursements and expenses of one counsel for the Selling Holders (not to exceed
$15,000 for any one registration) selected by them with the approval of the
Issuer; (iv) the cost of printing or producing any agreements among
underwriters, underwriting agreements, and blue sky or legal investment
memoranda (which shall not include legal fees); (v) the filing fees incident to
securing any required review by the National Association of Securities Dealers,
Inc. of the terms of the sale of the securities to be disposed of; (vi) fees and
expenses of other Persons reasonably necessary in connection with such offering,
including experts, transfer agents and registrars; (vii) all security engraving
and security printing expenses; and (viii) all fees and expenses payable in
connection with the listing of the Registrable Securities on any securities
exchange or automated interdealer quotation system on which the Registrable
Securities are then listed; provided that Registration Expenses shall exclude
all underwriting discounts, selling commissions and transfer taxes, if any, in
connection with the sale of any Registrable Securities.

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<PAGE>

          "RULE 144" shall mean Rule 144 (or any successor rule to similar
effect) promulgated under the Securities Act.

          "RULE 415 OFFERING" shall mean an offering on a delayed or continuous
basis pursuant to Rule 415 (or any successor rule to similar effect) promulgated
under the Securities Act.

          "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

          "SELLING HOLDER" shall mean any Holder who sells Registrable
Securities pursuant to a registration hereunder.

          SECTION 1.2 INTERNAL REFERENCES. Unless the context indicates
otherwise, references to Articles, Sections and paragraphs shall refer to the
corresponding articles, sections and paragraphs in this Agreement, and
references to the parties shall mean the parties to this Agreement.

                                   ARTICLE 2
                              REGISTRATION RIGHTS

          SECTION 2.1    DEMAND REGISTRATION.

          (a) Upon written notice to the Issuer from a Holder or Holders holding
at least 30% of the Registrable Securities (the "DEMAND REQUEST") requesting
that the Issuer effect the registration under the Securities Act of all or part
of the Registrable Securities held by such requesting Holders (the "REQUESTING
HOLDERS"), the Issuer shall prepare as soon as practicable and file with the
Commission, within 30 days after such request, a registration statement with
respect to such Registrable Securities and thereafter use its best efforts to
cause such registration statement to be declared effective under the Securities
Act as soon as practicable. A registration effected pursuant to a Demand Request
pursuant to this Section 2.1(a) shall be referred to herein as a "DEMAND
REGISTRATION."

          (b) Notwithstanding any other provision of this Agreement to the
contrary, a Demand Registration requested by Holders pursuant to this Section
2.1 shall not be deemed to have been effected, and, therefore, not requested and
the rights of each Holder shall be deemed not to have been exercised for
purposes of paragraph (a) above, if (i) such Demand Registration has not become
effective under the Securities Act or (ii) such Demand Registration, after it
became effective under the Securities Act, was not maintained effective under
the Securities Act for at least 180 days (or such shorter period ending when all
the Registrable Securities covered thereby have been disposed of pursuant
thereto) and, as a result thereof, the Registrable Securities requested to be
registered cannot be distributed in accordance with the plan of distribution set
forth in the related registration statement.

          (c) If the Requesting Holders initiating the Demand Registration
intend to distribute the Registrable Securities covered by their request by
means of an underwritten offering, they shall so advise the Issuer as a part of
their Demand Request and the Issuer shall include such information in the
written notice referred to in Section 2.1(d). In such event, the

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<PAGE>

right of any Holder to include its Registrable Securities in such registration
shall be conditioned upon such Holder's participation in such underwriting and
the inclusion of such Holder's Registrable Securities in the underwriting to the
extent provided herein. All Holders proposing to distribute their Registrable
Securities through such underwriting shall enter into an underwriting agreement
in customary form with the underwriter or underwriters selected for such
underwriting by a majority in interest of the Requesting Holders initiating the
registration (which underwriter or underwriters shall be reasonably acceptable
to the Issuer). Notwithstanding any other provision of this Section 2.1, if the
managing underwriter advises the Issuer that marketing factors require a
limitation of the number of securities to be underwritten (including Registrable
Securities), then the Issuer shall so advise all Requesting Holders of
Registrable Securities that would otherwise be underwritten pursuant hereto, and
the number of Registrable Securities that may be included in the underwriting
shall be allocated to the Requesting Holders on a pro rata basis based on the
number of Registrable Securities held by all Requesting Holders; provided,
however, that the number of Registrable Securities to be included in such
underwriting and registration will not be reduced unless all other securities of
the Issuer that are entitled by contract or otherwise to be included therein are
first entirely excluded from such underwriting and registration. If, as a result
of the reduction specified in the immediately previous sentence, the Requesting
Holders are required to reduce the securities they sought to register by 50% or
more then the registration shall not constitute a Demand Registration under this
Section 2.1. Any Registrable Securities excluded or withdrawn from such
underwriting shall be withdrawn from the registration.

          (d) Within five days after delivery of a Demand Request by a Holder,
the Issuer shall provide a written notice to all other Holders, advising each
such Holder of its right to include all or part of the Registrable Securities
held by such Holder for sale pursuant to the Demand Registration and advising
such Holder of procedures to enable such Holder to elect to so include
Registrable Securities for sale in the Demand Registration. Any Holder may,
within 10 days of delivery to such Holder of a notice pursuant to this Section
2.1(d), elect to so include all or any portion of such Holder's Registrable
Securities in the Demand Registration by written notice to such effect to the
Issuer specifying the number of Registrable Securities desired to be so included
by such Holder. All Holders requesting to have their Registrable Securities
included in a Demand Registration pursuant to this Section 2.1(d) shall be
deemed "Requesting Holders" for purposes of this Article 2.

          (e) The Demand Registrations requested pursuant to Section 2.1(a) are
subject to all the following limitations: (i) the Issuer shall not be required
to effect more than three Demand Registrations; (ii) the Issuer shall not be
required to effect more than one registration statement on Form S-1 or any
similar long form registration statement in any 12 month period and (iii) a
registration statement on Form S-1 or any similar long form registration
statement must include Registrable Securities with an aggregate public offering
price of at least $10,000,000.

          (f) Notwithstanding anything contained herein, upon the written
request ("FORM S-3 REQUEST") of a Holder, the Issuer shall prepare and file with
the Commission within 30 days after such request one or more registration
statements on Form S-3 (which may at the Holder's request be a Rule 415
Offering) covering the resale of Registrable Securities in an

                                       4
<PAGE>

amount as requested by such Holder, and the Issuer shall use its best efforts to
obtain the effectiveness of such registration statement as soon as practicable
after filing and to maintain the effectiveness of such registration statement
until the Registrable Securities have been sold pursuant thereto; provided,
however, that the Issuer shall not be obligated to effect any such registration
pursuant to this Section 2.1(f): (i) if Form S-3 is not available or (ii) if the
Holders, together with the holders of any other securities of the Issuer
entitled to inclusion in such registration, propose to sell Registrable
Securities and such other securities (if any) at an aggregate price to the
public (net of any underwriters' discounts or commissions) of less than
$10,000,000. No registration pursuant to this Section 2.1(f) shall be deemed a
Demand Registration for purposes of Section 2.1(e).

        SECTION 2.2 Piggyback Registrations.

        (a) Right to Piggyback. Each time the Issuer proposes to register any of
its equity securities under the Securities Act (other than registration
statements relating to employee benefit plans or with respect to corporate
reorganizations or other transactions under Rule 145 of the Securities Act) for
sale to the public, whether for the account of the Issuer or the account of any
securityholder, the Issuer shall give prompt written notice to each Holder of
Registrable Securities, which notice shall be given not less than 20 days prior
to the proposed initial filing date of the Issuer's registration statement and
shall offer each such Holder the opportunity to include in such registration all
or part of the Registrable Securities held by such Holder. Each Holder who
desires to include Registrable Securities in such registration shall so advise
the Issuer in writing (stating the number of Registrable Securities desired to
be registered or sold) within 15 days after the date of such notice from the
Issuer. Any Holder shall have the right to withdraw such Holder's request for
inclusion of such Holder's Registrable Securities in any offering pursuant to
this Section 2.2(a) by giving written notice to the Issuer of such withdrawal.
The Issuer may at any time withdraw or cease proceeding with any such
registration if it shall at the same time withdraw or cease proceeding with the
registration of all other equity securities originally proposed to be
registered.

        (b) Priority on Piggyback Registrations. If the registration statement
under which the Issuer gives notice under this Section 2.2 is for an
underwritten offering, the Issuer shall so advise the Holders of Registrable
Securities. In such event, the right of any such Holder to be included in a
registration pursuant to this Section 2.2 shall be conditioned upon such
Holder's participation in such underwriting and the inclusion of such Holder's
Registrable Securities in the underwriting to the extent provided herein. All
Holders proposing to distribute their Registrable Securities through such
underwriting shall enter into an underwriting agreement in customary form with
the underwriter or underwriters. Notwithstanding any other provision of the
Agreement, if the managing underwriter determines in good faith that marketing
factors require a limitation of the number of securities to be underwritten, the
number of securities that may be included in the underwriting shall be allocated
as follows:

        (i)  with respect to an offering initiated by the Issuer on its own
             behalf, first, to the Issuer, and second to the Holders and any
             other securityholders of the Issuer who have the right to include
             securities in such offering pro rata

                                       5
<PAGE>

             based on the number of securities proposed by such Persons to be
             included in the offering; and

        (ii) with respect to an offering pursuant to demand registration rights
             of securityholders of the Issuer other than the Holders, first to
             the securityholders pursuant to their demand registration rights,
             second to the Issuer, and third, to the Holders and any other
             securityholders of the Issuer who have the right to include
             securities in such offering pro rata based on the number of
             securities proposed by the Holders and such other securityholders
             to be included in such offering.

If as a result of the provisions of this Section 2.2(b) any Holder shall not be
entitled to include all Registrable Securities in an offering that such Holder
has requested to be so included, such Holder may withdraw such Holder's request
to include Registrable Securities in such offering prior to completion of the
offering.

        SECTION 2.3 CERTAIN DELAY RIGHTS. The Issuer may defer the filing or
effectiveness (but not the preparation) of a registration statement required by
Section 2.1 for a period not to exceed 90 days (or, if longer, 90 days after the
effective date of the registration statement contemplated by clause (ii) or
(iii) below) if (i) at the time the Issuer receives the Demand Request or
Form S-3 Request, the Issuer or any of its subsidiaries are engaged in
confidential negotiations or other confidential business activities, disclosure
of which would be required in such registration statement (but would not be
required if such registration statement were not filed), and the Board
determines in good faith that such disclosure would be materially detrimental to
the Issuer and its securityholders or would have a material adverse effect on
any such confidential negotiations or other confidential business activities,
(ii) within ten (10) business days following its receipt of a Demand Request or
Form S-3 Request, the Issuer decides to effect a public offering of the Issuer's
securities of the same class as Registrable Securities for the Issuer's account,
or (iii) prior to the receipt of any Demand Request or Form S-3 Request, another
Person has exercised demand registration rights and the Issuer has begun
preparations or planning for the offering. A deferral of the filing or
effectiveness of a registration statement pursuant to this Section 2.3 shall be
lifted, and the requested registration statement shall be filed forthwith, if,
in the case of a deferral pursuant to clause (i) of the preceding sentence, the
negotiations or other activities are disclosed or terminated, or, in the case of
a deferral pursuant to clause (ii) or (iii) of the preceding sentence, the
proposed offering for the Issuer's or another securityholder's account is
abandoned. In order to defer the filing or effectiveness of a registration
statement pursuant to this Section 2.3, the Issuer shall promptly (but in any
event within three (3) business days), upon determining to seek such deferral,
deliver to each Holder a certificate signed by an executive officer of the
Issuer stating that the Issuer is deferring such filing pursuant to this Section
2.3 and a general statement of the reason for such deferral, and an
approximation of the anticipated delay. Within 20 days after receiving such
certificate, the holders of a majority of the Registrable Securities held by the
Requesting Holders or the Holder who delivered the Form S-3 Request and for
which registration was previously requested may withdraw such Demand Request or
Form S-3 Request, as applicable, by giving notice to the Issuer. If withdrawn,
the Demand Request or Form S-3 Request, as applicable, shall be deemed not to
have been made for all purposes of this Agreement other than this Section 2.3.
The Issuer

                                       6
<PAGE>

may defer the filing of a particular registration statement pursuant to this
Section 2.3 only once during any 12-month period.

        SECTION 2.4 EXPENSES. Except as provided herein, the Issuer shall be
responsible for all Registration Expenses with respect to each registration
hereunder, whether or not any registration statement becomes effective.
Notwithstanding the foregoing; (i) each Holder shall be responsible for all
underwriting discounts, selling commissions and transfer taxes, if any, in
connection with the sale of securities by such Holder, and (ii) the Issuer shall
be responsible for all out-of-pocket costs and expenses of the Issuer and its
officers and employees incurred in connection with providing the assistance
and/or attending analyst or investor presentations or any "road show" undertaken
in connection with the registration and/or marketing of any Registrable
Securities as contemplated in Section 2.5(g).

        SECTION 2.5 REGISTRATION AND QUALIFICATION. If and whenever the Issuer
is required to effect the registration of any Registrable Securities under the
Securities Act as provided in Section 2.1, the Issuer shall as promptly as
practicable (but subject to the provisions of Section 2.1):

        (a) prepare, file and cause to become effective a registration statement
under the Securities Act relating to the Registrable Securities to be offered in
accordance with the intended method of disposition thereof;

        (b) prepare and file with the Commission such amendments and supplements
to such registration statement and the prospectus used in connection therewith
as may be necessary to keep such registration statement effective and to comply
with the provisions of the Securities Act with respect to the disposition of all
Registrable Securities until the earlier of (i) such time as all Registrable
Securities proposed to be sold therein have been disposed of in accordance with
the intended methods of disposition set forth in such registration statement and
(ii) the expiration of 180 days after such registration statement becomes
effective, provided, that such 180-day period shall be extended for such number
of days that equals the number of days elapsing from (x) the date the written
notice contemplated by Section 2.5(e) below is given by the Issuer to (y) the
date on which the Issuer delivers to the Holders of Registrable Securities the
supplement or amendment contemplated by Section 2.5(e) below;

        (c) furnish to the Holders of Registrable Securities and to any
underwriter of such Registrable Securities such number of conformed copies of
such registration statement and of each such amendment and supplement thereto
(in each case including all exhibits), such number of copies of the prospectus
included in such registration statement (including each preliminary prospectus)
in conformity with the requirements of the Securities Act and such documents
incorporated by reference in such registration statement or prospectus as the
Holders of Registrable Securities or such underwriter may reasonably request (it
being understood that, subject to Section 2.9 and the requirements of the
Securities Act and applicable state securities law, the Issuer consents to the
use of the prospectus and any amendment or supplement thereto by each Selling
Holder and the underwriters in connection with the offering and sale of the
Registrable Securities covered by the registration statement of which such
prospectus, amendment to supplement is a part);

                                       7
<PAGE>

        (d) use its reasonable best efforts to obtain an opinion of counsel for
the Issuer and a "cold comfort" letter signed by the independent public
accountants who have audited the financial statements of the Issuer included in
or incorporated by reference into the applicable registration statement, in each
such case covering substantially such matters with respect to such registration
statement (and the prospectus included therein) and the related offering as are
customarily covered in opinions of issuer's counsel with respect thereto and in
accountants' letters delivered to underwriters in underwritten public offerings
of securities and such other matters as such underwriters may reasonably request
and furnish to each underwriter a copy of such opinion and such letter;

        (e) promptly notify the Selling Holders and each underwriter in writing
(i) when a prospectus or any prospectus supplement or post-effective amendment
has been filed and, with respect to a registration statement or any post-
effective amendment, when the same has become effective, (ii) of the issuance by
any state securities or other regulatory authority of any order suspending the
qualification or exemption from qualification of any of the Registrable
Securities under state securities or "blue sky" laws or the initiation of any
proceedings for that purpose, (iii) at any time when a prospectus relating to a
registration pursuant to Section 2.1 is required to be delivered under the
Securities Act, of the happening of any event that the Issuer becomes aware of,
as a result of which the prospectus included in such registration statement, as
then in effect, includes an untrue statement of a material fact or omits to
state any material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading, and (iv) of any request by the Commission, or any other
regulatory body or other body having jurisdiction, for any amendment or
supplement to any registration statement or other document relating to such
offering, and in either such case, at the request of the Selling Holders,
promptly prepare and furnish to the Selling Holders a reasonable number of
copies of a supplement to or an amendment of such prospectus as may be necessary
so that, as thereafter delivered to the purchasers of such Registrable
Securities, such prospectus shall not include an untrue statement of a material
fact or omit to state a material fact required to be stated therein or necessary
to make the statements therein, in light of the circumstances under which they
are made, not misleading;

        (f) use its reasonable best efforts to list all such Registrable
Securities covered by such registration on each securities exchange or automated
interdealer quotation system on which the Common Units are then listed;

        (g) use its reasonable best efforts to assist the Holders in the
marketing of Common Units in connection with underwritten offerings hereunder
(including, to the extent reasonably consistent with work commitments, using
reasonable efforts to have officers of the Issuer attend "road shows" and
analyst or investor presentations scheduled in connection with such
registration), with all out-of-pocket costs and expenses incurred by the Issuer
or such officers in connection with such attendance or assistance to be paid by
the Issuer as provided in Section 2.4;

        (h) use its reasonable best efforts to register or qualify such
Registrable Securities under such other securities or blue sky laws of such
jurisdictions as the managing underwriter reasonably requests; use its
reasonable best efforts to keep each such registration or

                                       8
<PAGE>

qualification (or exemption therefrom) effective during the period in which such
registration statement is required to be kept effective; and do any and all
other acts and things which may be reasonably necessary or advisable to enable
such Selling Holder to consummate the disposition of the Registrable Securities
owned by such Selling Holder in such jurisdictions (provided, however, that the
Issuer will not be required to (A) qualify generally to do business in any
jurisdiction where it would not otherwise be required to qualify but for this
subparagraph or (B) consent to general service of process in any such
jurisdiction);

        (i) make generally available to the Holders an earning statement
satisfying the provisions of Section 11(a) of the Securities Act no later than
30 days after the end of the 12-month period beginning with the first day of the
Issuer's first fiscal quarter commencing after the effective date of a
registration statement, which earnings statement shall cover said 12-month
period, and which requirement will be deemed to be satisfied if the Issuer
timely files complete and accurate information on Forms 10-Q, 10-K and 8-K under
the Exchange Act, and otherwise complies with Rule 158 under the Securities Act;

        (j) if requested by the managing underwriter or any Selling Holder,
promptly incorporate in a prospectus supplement or post-effective amendment such
information as the managing underwriter or any Selling Holder reasonably
requests to be included therein, including, without limitation, with respect to
the Registrable Securities being sold by such Selling Holder, the purchase price
being paid therefor by the underwriters and with respect to any other terms of
the underwritten offering of the Registrable Securities to be sold in such
offering, and promptly make all required filings of such prospectus supplement
or post-effective amendment;

        (k) as promptly as practicable after filing with the Commission of any
document which is incorporated by reference into a registration statement (in
the form in which it was incorporated), deliver a copy of each such document to
each Selling Holder;

        (l) provide a CUSIP number for the Registrable Securities included in
any registration statement not later than the effective date of such
registration statement;

        (m) cooperate with each Selling Holder and each underwriter
participating in the disposition of such Registrable Securities and their
respective counsel in connection with any filings required to be made with the
National Association of Securities Dealers, Inc.;

        (n) prepare and file with the Commission promptly any amendments or
supplements to such registration statement or prospectus which, in the opinion
of counsel for the Issuer or the managing underwriter, is required in connection
with the distribution of the Registrable Securities; and

        (o) advise each Selling Holder of such Registrable Securities, promptly
after it shall receive notice or obtain knowledge thereof, of the issuance of
any stop order by the Commission suspending the effectiveness of such
registration statement or the initiation or threatening of any proceeding for
such purpose and promptly use its best efforts to prevent the

                                       9
<PAGE>

issuance of any stop order or to obtain its withdrawal at the earliest possible
moment if such stop order should be issued.

        SECTION 2.6 UNDERWRITING; DUE DILIGENCE.

        (a) If requested by the underwriters for any underwritten offering of
Registrable Securities pursuant to a registration requested under this Article
2, the Issuer shall enter into an underwriting agreement with such underwriters
for such offering, which agreement will contain such representations and
warranties by the Issuer and such other terms and provisions as are customarily
contained in underwriting agreements with respect to secondary distributions,
including, without limitation, indemnification and contribution provisions
substantially to the effect and to the extent provided in Section 2.7, and
agreements as to the provision of opinions of counsel and accountants' letters
to the effect and to the extent provided in Section 2.5(d). Such underwriting
agreement shall also contain such representations and warranties by such Selling
Holders and such other terms and provisions as are customarily contained in
underwriting agreements with respect to secondary distributions, including,
without limitation, indemnification and contribution provisions substantially to
the effect and to the extent provided in Section 2.7.

        (b) In connection with the preparation and filing of each registration
statement registering Registrable Securities under the Securities Act pursuant
to this Article 2, the Issuer shall give the Selling Holders and the
underwriters, if any, and their respective counsel and accountants, such
reasonable and customary access to its books, records and properties and such
opportunities to discuss the business and affairs of the Issuer with its
officers and the independent public accounts who have certified the financial
statements of the Issuer as shall be necessary, in the opinion of such Holders
and such underwriters or their respective counsel, to conduct a reasonable
investigation within the meaning of the Securities Act; provided that (i) each
Holder and the underwriters and their respective counsel and accountants shall
have entered into a confidentiality agreement reasonably acceptable to the
Issuer and (ii) each Holder and the underwriters and their respective counsel
and accountants shall use their reasonable best efforts to minimize the
disruption to the Issuer's business and coordinate any such investigation of the
books, records and properties of the Issuer and any such discussions with the
Issuer's officers and accountants so that all such investigations occur at the
same time and all such discussions occur at the same time.

        SECTION 2.7 INDEMNIFICATION AND CONTRIBUTION.

        (a) The Issuer agrees to indemnify and hold harmless, to the fullest
extent permitted by law, each Selling Holder and each of its employees,
advisors, agents, representatives, partners, officers and directors, and each
Person, if any, who controls such Selling Holder within the meaning of either
Section 15 of the Securities Act or Section 20 of the Exchange Act from and
against any and all losses, claims, damages, liabilities or expenses (including,
without limitation, any legal or other expenses reasonably incurred in
connection with defending or investigating any such action or claim) ("LOSSES")
insofar as such Losses are caused by any untrue statement or alleged untrue
statement of a material fact contained in any registration statement or any
amendment thereof, any preliminary prospectus or prospectus (as

                                       10
<PAGE>

amended or supplemented if the Issuer shall have furnished any amendments or
supplements thereto) relating to the Registrable Securities, or caused by any
omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements therein not misleading, or
caused by any violation or alleged violation by the Issuer of the Securities
Act, the Exchange Act, any state securities laws or any rule or regulation
promulgated under the Securities Act, the Exchange Act or any state securities
laws, except insofar as such Losses are caused by any such untrue statement or
omission or alleged untrue statement or omission made in reliance upon
information furnished to the Issuer in writing by such Selling Holder (or any
representative thereof) expressly for use therein. The Issuer also agrees to
indemnify any underwriter of the Registrable Securities so offered and each
Person, if any, who controls such underwriter on substantially the same basis as
that of the indemnification by the Issuer of the Selling Holders provided in
this Section 2.7(a). The reimbursement required by this Section 2.7(a) will be
made by periodic payments during the course of the investigation or defense, as
and when bills are received or expenses incurred.

        (b) Each Selling Holder agrees to indemnify and hold harmless the
Issuer, its employees, advisors, agents, representatives, directors, the
officers who sign the registration statement and each Person, if any who
controls the Issuer within the meaning of either Section 15 of the Securities
Act or Section 20 of the Exchange Act, from and against any and all Losses,
insofar as such Losses are caused by any untrue statement or alleged untrue
statement of a material fact contained in any registration statement or any
amendment thereof, any preliminary prospectus or prospectus (as amended or
supplemented if the Issuer shall have furnished any amendments or supplements
thereto) relating to the Registrable Securities, or caused by any omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, but only with
reference to information furnished in writing by such Selling Holder (or any
representative thereof) expressly for use in a registration statement, any
preliminary prospectus, prospectus or any amendments or supplements thereto;
provided that the obligation to indemnify will be several, not joint and
several, among such Selling Holders, and the liability of each Selling Holder
will be in proportion to, and provided further that such liability will be
limited to, the net amount received by such seller from the sale of Registrable
Securities pursuant to such registration statement; provided, however, that such
Selling Holder shall not be liable in any such case to the extent that prior to
the filing of any such registration statement or prospectus or amendment thereof
or supplement thereto, such Selling Holder has furnished in writing to the
Issuer information expressly for use in such registration statement or
prospectus or any amendment or supplement thereto which corrected or made not
misleading information previously furnished to the Issuer. Each Selling Holder
also agrees to indemnify any underwriter of the Registrable Securities so
offered and each Person, if any, who controls such underwriter on substantially
the same basis as that of the indemnification by such Selling Holder of the
Issuer provided in this Section 2.7(b).

        (c) Each party indemnified under paragraph (a) or (b) above shall,
promptly after receipt of notice of a claim or action against such indemnified
party in respect of which indemnity may be sought hereunder, notify the
indemnifying party in writing of the claim or action; provided that the failure
to notify the indemnifying party shall not relieve it from any liability that it
may have to an indemnified party on account of the indemnity agreement contained
in paragraph (a) or (b) above except to the extent that the indemnifying party
was

                                       11
<PAGE>

actually prejudiced by such failure, and in no event shall such failure relieve
the indemnifying party from any other liability that it may have to such
indemnified party. If any such claim or action shall be brought against an
indemnified party, and it shall have notified the indemnifying party thereof,
unless based on the written advice of counsel to such indemnified party a
conflict of interest between such indemnified party and indemnifying parties may
exist in respect of such claim, the indemnifying party shall be entitled to
participate therein, and, to the extent that it wishes, jointly with any other
similarly notified indemnifying party, to assume the defense thereof. After
notice from the indemnifying party to the indemnified party of its election to
assume the defense of such claim or action, the indemnifying party shall not be
liable to the indemnified party under this Section 2.7 for any legal or other
expenses subsequently incurred by the indemnified party in connection with the
defense thereof. Any indemnifying party against whom indemnity may be sought
under this Section 2.7 shall not be liable to indemnify an indemnified party if
such indemnified party settles such claim or action without the consent of the
indemnifying party. The indemnifying party may not agree to any settlement of
any such claim or action, other than solely for monetary damages for which the
indemnifying party shall be responsible hereunder, the result of which any
remedy or relief shall be applied to or against the indemnified party, without
the prior written consent of the indemnified party, which consent shall not be
unreasonably withheld and unless such settlement contains a full and
unconditional release of the indemnified party. In any action hereunder as to
which the indemnifying party has assumed the defense thereof, the indemnified
party shall continue to be entitled to participate in the defense thereof, with
counsel of its own choice, but the indemnifying party shall not be obligated
hereunder to reimburse the indemnified party for the costs thereof.

        (d) If the indemnification provided for in this Section 2.7 shall for
any reason be unavailable (other than in accordance with its terms) to an
indemnified party in respect of any Loss referred to herein, then each
indemnifying party shall, in lieu of indemnifying such indemnified party,
contribute to the amount paid or payable by such indemnified party as a result
of such Loss in such proportion as is appropriate to reflect the relative fault
of the indemnifying party or parties on the one hand and of the indemnified
party or parties on the other hand in connection with the statements or
omissions that resulted in such Losses, as well as any other relevant equitable
considerations. The relative fault of the Issuer on the one hand and the Selling
Holders on the other hand shall be determined by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or the
omission or alleged omission to state a material fact relates to information
supplied by the Issuer or a Selling Holder and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission. The amount paid or payable by an indemnified party as a
result of the Loss, or action in respect thereof, referred to above in this
paragraph (d) shall be deemed to include, for purposes of this paragraph (d),
any legal or other expenses reasonably incurred by such indemnified party in
connection with investigating or defending any such action or claim. The Issuer
and the Selling Holders agree that it would not be just and equitable if
contribution pursuant to this Section 2.7 were determined by pro rata allocation
or by any other method of allocation which does not take account of the
equitable considerations referred to in this paragraph. Notwithstanding any
other provision of this Section 2.7, no Selling Holder shall be required to
contribute any amount in excess of the amount by which the total price at which
the Registrable Securities of such Selling Holder were offered to the public
exceeds the amount of any damages which such Selling Holder has otherwise been
required to pay by reason of such

                                       12
<PAGE>

untrue or alleged untrue statement or omission or alleged omission. No Person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Securities Act) shall be entitled to contribution from any Person who was
not guilty of such fraudulent misrepresentation. The Holders' obligations in
this Section 2.7(d) to contribute shall be several in proportion to the amount
of Registrable Securities registered by them and not joint.

        (e) The obligations of the parties under this Section 2.7 shall be in
addition to any liability which any party may otherwise have to any other party.

        SECTION 2.8 AVAILABLE INFORMATION. The Issuer agrees to use its
reasonable best efforts to:

        (a) Make and keep public information available, as those terms are
understood and defined in Rule 144;

        (b) File with the Commission, in a timely manner, all reports and other
documents required of the Issuer under the Exchange Act; and

        (c) furnish to a Holder forthwith upon request: a written statement by
the Issuer as to its compliance with the reporting requirements of Rule 144 and
of the Exchange Act; a copy of the most recent annual or quarterly report of the
Issuer; and such other reports and documents as a Holder may reasonably request
in availing itself of any rule or regulation of the Commission allowing it to
sell any of the Issuer's securities without registration.

        SECTION 2.9 SUSPENSION OF DISPOSITIONS. Each Holder agrees by
acquisition of any Registrable Securities that, upon receipt of any notice (a
"SUSPENSION NOTICE") from the Issuer of the happening of any event of the kind
described in Section 2.5(e)(iii), such Holder will forthwith discontinue
disposition of Registrable Securities until such Holder's receipt of the copies
of the supplemented or amended prospectus, or until it is advised in writing
(the "ADVICE") by the Issuer that the use of the prospectus may be resumed, and
has received copies of any additional or supplemental filings which are
incorporated by reference in the prospectus, and, if so directed by the Issuer,
such Holder will deliver to the Issuer all copies, other than permanent file
copies then in such Holder's possession, of the prospectus covering such
Registrable Securities current at the time of receipt of such notice. In the
event the Issuer shall give any such notice, the time period regarding the
effectiveness of registration statements set forth in Section 2.5(b) hereof
shall be extended by the number of days during the period from and including the
date of the giving of the Suspension Notice to and including the date when each
Selling Holder of Registrable Securities covered by such registration statement
shall have received the copies of the supplemented or amended prospectus or the
Advice. The Issuer shall use its best efforts and take such actions as are
reasonably necessary to render the Advice as promptly as practicable.

                                       13
<PAGE>

                                   ARTICLE 3
                                 MISCELLANEOUS

        SECTION 3.1 ENTIRE AGREEMENT. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all other prior agreements and understandings, both written and oral,
between the parties with respect to the subject matter hereof.

        SECTION 3.2 NO CONFLICTING RIGHTS. The Issuer represents and warrants
that no other Person has registration rights that conflict with the rights
granted to the Holders hereunder.

        SECTION 3.3 ASSIGNMENT. Except as otherwise provided herein, no party
may assign any of its rights or obligations hereunder, by operation of law or
otherwise, without the prior written consent of the other parties. A Holder may
assign its rights and interests hereunder to (i) any Affiliate of the Holder and
(ii) any other Person in connection with the transfer of the lesser of (x) at
least 5% of the then outstanding Registrable Securities and (y) 25% of the
Registrable Securities then beneficially owned by the Holder; provided, however,
the rights and interests hereunder transferred under (ii) shall apply only with
respect to the Registrable Securities transferred and such transferee under (ii)
shall not be permitted to further assign its rights and interests hereunder.
Subject to the provisions of this Section 3.3, each transferee shall be a
"Holder" for all purposes under this Agreement upon execution and delivery of
its written agreement to be bound by the terms hereof.

        SECTION 3.4 AMENDMENTS, WAIVERS, ETC. This Agreement may not be amended,
changed, supplemented, waived or otherwise modified or terminated, except upon
the execution and delivery of a written agreement executed by the Issuer and
Holders representing a majority of the Registrable Securities then held by all
Holders.

        SECTION 3.5 NOTICES. All notices under this Agreement shall be in
writing and shall be deemed to have been received (a) when personally delivered
or sent by telecopy, (b) one day following delivery by overnight delivery
courier, with all delivery charges pre-paid, or (c) on the third business day
following the date on which it was sent by United States mail, postage prepaid,
to a party at the address or fax number, as the case may be, of such party as
set forth on the signature page of this Agreement or such other address as a
party may specify in writing.

        SECTION 3.6 SEVERABILITY. Whenever possible, each provision or portion
of any provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.

        SECTION 3.7 NO WAIVER. The failure of any party hereto to exercise any
right, power or remedy provided under this Agreement or otherwise available in
respect hereof at law

                                       14
<PAGE>

or in equity, or to insist upon compliance by any other party hereto with its
obligations hereunder, and any custom or practice of the parties at variance
with the terms hereof, shall not constitute a waiver by such party of its right
to exercise any such or other right, power or remedy or to demand such
compliance.

        SECTION 3.8 NO THIRD PARTY BENEFICIARIES. This Agreement is not intended
to be for the benefit of, and shall not be enforceable by, any Person who or
which is not a party hereto; provided, that, this Agreement is also intended to
be for the benefit of and is enforceable by each Holder.

        SECTION 3.9 GOVERNING LAW. This Agreement will be governed by and
construed in accordance with the laws of the State of Texas other than the
conflict of laws rules thereof.

        SECTION 3.10 DESCRIPTIVE HEADINGS. The descriptive headings used herein
are inserted for convenience of reference only and are not intended to be part
of or to affect the meaning or interpretation of this Agreement.

        SECTION 3.11 COUNTERPARTS. This Agreement may be executed in
counterpart, each of which shall be deemed to be an original, but all of which,
taken together, shall constitute one and the same agreement.

                            [Signature page follows]

                                       15
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the date first above written.

                              Plains Resources Inc.,
                              a Delaware corporation

                              By:    /s/ Greg L. Armstrong
                                    ---------------------------------
                              Name:  Greg L. Armstrong
                                    ---------------------------------
                              Title: President and Chief Executive Officer
                                    ---------------------------------

                              Address:  500 Dallas Street, Suite 2700
                                        Houston, Texas 77002

                              Facsimile No. (713) 654-1523

                               /s/ James C. Flores
                              --------------------------------------
                              James C. Flores

                              Address:
                                      ------------------------------

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

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

                              Facsimile No.:
                                            ------------------------

                                      S-1

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