Exhibit 99.2


                                                  Execution Copy


                          UNS GAS, INC.
                 UNISOURCE ENERGY SERVICES, INC.

               One South Church Street, Suite 1820
                     Tucson, Arizona  85701




                                               New York, New York
                                            as of August 11, 2003



TO EACH OF THE PURCHASERS LISTED IN
THE ATTACHED SCHEDULE A:

Ladies and Gentlemen:

UNS  GAS, INC., a corporation incorporated under the law  of
the  State  of  Arizona (the Company) and  UNISOURCE  ENERGY
SERVICES, INC., a corporation incorporated under the law  of
the  State of Arizona (the Guarantor and, together with  the
Company, the Obligors) agree with you as follows:

1.   INTRODUCTORY MATTERS; AUTHORIZATION OF NOTES

1.1  Introductory Matters

(a)  Certain capitalized terms used in this Agreement are
     defined in Schedule B; references to a "Schedule" or an
     "Exhibit" are, unless otherwise specified, to a Schedule or
     an Exhibit attached to this Agreement.

(b)  The Guarantor is a wholly owned subsidiary of UniSource
     Energy.  The Company is a wholly owned Subsidiary of the
     Guarantor.

(c)  UniSource Energy and Citizens have entered into an
     asset purchase agreement dated as of October 29, 2002 (the
     GasCo Purchase Agreement) pursuant to which Citizens will
     transfer certain assets (the Assets) and liabilities to the
     Company (the Acquisition).

(d)  In order to fund a portion of the purchase price of the
     Acquisition, the Company proposes to issue Notes as
     described herein.

1.2  Authorization of Notes

The Company will authorize the issue and sale of (i) 6.23%
guaranteed senior notes due August 11, 2011 in an aggregate
principal amount of $50,000,000 (the Series A Notes)



and (ii) 6.23% guaranteed senior notes due August 11, 2015 in
an aggregate principal amount of $50,000,000 (the Series B
Notes and, together with the Series A Notes, the Notes, such
term to include any such notes issued in substitution
therefor pursuant to Section 14 of this Agreement or the
Other Agreements (as hereinafter defined)).  The Series A
Notes and the Series B Notes shall be substantially in the
form set out in Exhibit 1-A and Exhibit 1-B, respectively,
with such changes therefrom, if any, as may be approved by
you and the Company.  The Series of a Note refers to whether
a Note is a Series A Note or a Series B Note.

2.   SALE AND PURCHASE OF NOTES

Subject to the terms and conditions of this Agreement, the
Company will issue and sell to you and you will purchase
from the Company, at the Closing provided for in Section 3,
Notes in the principal amount and the respective Series
specified opposite your name in Schedule A at the purchase
price of 100% of the principal amount thereof.
Contemporaneously with entering into this Agreement, the
Company is entering into separate Note Purchase Agreements
(the Other Agreements) identical with this Agreement with
each of the other purchasers named in Schedule A (the Other
Purchasers), providing for the sale at such Closing to each
of the Other Purchasers of Notes in the principal amount and
respective Series specified opposite its name in Schedule A.
Your obligation hereunder and the obligations of the Other
Purchasers under the Other Agreements are several and not
joint obligations and you shall have no obligation under
any Other Agreement and no liability to any Person for the
performance or non-performance by any Other Purchaser
thereunder.

3.   CLOSING

The sale and purchase of the Notes to be purchased by you
and the Other Purchasers shall occur at the offices of
Freshfields Bruckhaus Deringer LLP, 520 Madison Avenue, 34th
Floor, New York, New York 10022 at 10:30 a.m., New York City
time, at a closing (the Closing) on August 11, 2003 or on
such other Business Day as may be agreed upon by the Company
and you and the Other Purchasers.  At the Closing the
Company will deliver to you the Notes of each Series to be
purchased by you in the form of a single Note of such Series
(or such greater number of Notes of such Series in
denominations of at least $100,000 or any multiple of $1,000
in excess thereof as you may request) dated the date of the
Closing and registered in your name (or in the name of your
nominee), against delivery by you to the Company or its
order of immediately available funds in the amount of the
purchase price therefor by wire transfer of immediately
available funds for the account of the Company to account
number 4945086759 at Wells Fargo Bank, ABA Number 121000248.
If at the Closing the Company shall fail to tender such
Notes to you as provided above in this Section 3, or any of
the conditions specified in Section 4 shall not have been
satisfied or waived, you shall, at your election, be
relieved of all further obligations under this Agreement,
without thereby waiving any rights you may have by reason of
such failure or such nonfulfillment.

                                                                 Page 2


4.   CONDITIONS TO CLOSING

Your obligation to purchase and pay for the Notes to be sold
to you at the Closing is subject to the satisfaction or
waiver, prior to or at the Closing, of the following
conditions:

4.1  Representations and Warranties

(a)  The representations and warranties of the Obligors in
     this Agreement shall be correct when made and at the time of
     the Closing.

(b)  The representations and warranties of Citizens in the
     GasCo Purchase Agreement shall be correct when made and at
     the time of the Closing.

4.2  Performance; No Default

Each Obligor shall have performed and complied with all
agreements and conditions contained in this Agreement
required to be performed or complied with by it prior to or
at the Closing and after giving effect to the issue and sale
of the Notes (and the application of the proceeds thereof as
contemplated by Section 5.13) no Default or Event of Default
shall have occurred and be continuing.  Neither any Obligor
nor any Subsidiary of the Company shall have entered into
any transaction since the date of the Memorandum that would
have been prohibited by Sections 10.1, 10.3, 10.4 or 10.5
hereof had such Sections applied since such date.

4.3  Compliance Certificates

(a)  Officer's Certificate.  Each Obligor shall have
     delivered to you an Officer's Certificate, dated the date of
     the Closing, certifying that the conditions specified in
     Sections 4.1(a), 4.2 and 4.10, to the extent such conditions
     apply to such Obligor, have been fulfilled.

(b)  Secretary's Certificate.  Each Obligor shall have
     delivered to you a certificate certifying as to the
     resolutions attached thereto and other corporate proceedings
     relating to the authorization, execution and delivery of the
     Financing Documents to which such Obligor is a party.

4.4  Opinions of Counsel

You shall have received opinions in form and substance
satisfactory to you, dated the date of the Closing (a) from
Thelen Reid and Priest LLP, special New York counsel for the
Company, covering the matters set forth in Exhibit 2-A and
covering such other matters incident to the transactions
contemplated hereby as you or your counsel may reasonably
request (and the Company hereby instructs its counsel to
deliver such opinion to you), (b) from Vincent Nitido, Jr.,
general counsel for the Company and the Guarantor, covering
the matters set forth in Exhibit 2-B and covering such other
matters incident to the transactions contemplated hereby as
you or your counsel may reasonably request (and

                                                                 Page 3


the Company hereby instructs its counsel to deliver such
opinion to you), and (c) from Freshfields Bruckhaus Deringer
LLP, your special New York counsel in connection with such
transactions, substantially in the form set forth in Exhibit
2-C and covering such other matters incident to such
transactions as you may reasonably request.

4.5  Purchase Permitted By Applicable Law, etc.

On the date of the Closing your purchase of Notes shall (i)
be permitted by the laws and regulations of each
jurisdiction to which you are subject, without recourse to
provisions (such as Section 1405(a)(8) of the New York
Insurance Law) permitting limited investments by insurance
companies without restriction as to the character of the
particular investment, (ii) not violate any applicable law
or regulation (including, without limitation, Regulation U,
T or X of the Board of Governors of the Federal Reserve
System) and (iii) not subject you to any tax, penalty or
liability under or pursuant to any applicable law or
regulation, which law or regulation was not in effect on the
date hereof.  If requested by you, you shall have received
an Officer's Certificate certifying as to such matters of
fact as you may reasonably specify to enable you to
determine whether such purchase is so permitted.

4.6  Sale of Other Notes

Contemporaneously with the Closing the Company shall sell to
the Other Purchasers and the Other Purchasers shall purchase
the Notes to be purchased by them at the Closing as
specified in Schedule A.

4.7  Related Transaction

Contemporaneously with the Closing, ElecCo, the Guarantor
and the Purchasers shall enter into the ElecCo Note Purchase
and Guaranty Agreement and the transactions contemplated
thereby.

4.8  Payment of Special Counsel Fees

Without limiting the provisions of Section 16.1, the Company
shall have paid on or before the Closing the reasonable
fees, charges and disbursements of your special counsel
referred to in Section 4.4 to the extent reflected in a
statement of such counsel rendered to the Company at least
one Business Day prior to the Closing.

4.9  Private Placement Number

A Private Placement number issued by Standard & Poor's CUSIP
Service Bureau (in cooperation with the Securities Valuation
Office of the National Association of Insurance
Commissioners) shall have been obtained for each Series of
Notes.

4.10 Changes in Corporate Structure

                                                                 Page 4


No Obligor shall have changed its jurisdiction of
incorporation or been a party to any merger or consolidation
and shall not have succeeded to all or any substantial part
of the liabilities of any other entity except as provided in
the GasCo Purchase Agreement.

4.11 Acquisition Transaction

(a)  You shall have received a true and correct copy of the
     GasCo Purchase Agreement.  The GasCo Purchase Agreement and
     each other agreement implementing the transactions
     contemplated thereby shall have been duly executed and
     delivered by the parties named therein, shall be in full
     force and effect and no material default shall exist
     thereunder.

(b)  All Governmental Approvals necessary under applicable
     Governmental Rules to be obtained by Citizens, UniSource
     Energy, the Company or any of their Affiliates in connection
     with the due execution and delivery of, and performance by
     Citizens, UniSource Energy or any such Affiliate of its
     obligations, and the exercise of its rights, under the GasCo
     Purchase Agreement shall have been duly obtained, shall have
     been validly issued and shall be in full force and effect.

(c)  You shall have received a copy of the order of the ACC
     issued July 3, 2003 approving the ACC Settlement Agreement
     as modified by such order.  Such order shall be final and in
     full force and effect.

(d)  You shall have received a copy of the order of the
     Federal Energy Regulatory Commission issued May 21, 2003
     authorizing disposition of jurisdictional facilities.  Such
     order shall be final and in full force and effect.

(e)  You shall have received a copy of the order of the
     Securities and Exchange Commission issued August 1, 2003
     authorizing the acquisition by UniSource Energy and the
     Guarantor of all of the common stock of the Company.  Such
     order shall be final and in full force and effect.

4.12 Proceedings and Documents

All corporate and other proceedings in connection with the
transactions contemplated by this Agreement and by the
ElecCo Note Purchase and Guaranty Agreement and all
documents and instruments incident to such transactions
shall be satisfactory to you and your special counsel, and
you and your special counsel shall have received all such
counterpart originals or certified or other copies of such
documents as you or they may reasonably request.

5.   REPRESENTATIONS AND WARRANTIES OF THE OBLIGORS

Each Obligor represents and warrants to you that:

                                                                 Page 5


5.1  Organization; Power and Authority

Such Obligor is a corporation duly organized, validly
existing and in good standing under the laws of its
jurisdiction of incorporation, and is duly qualified as a
foreign corporation and is in good standing in each
jurisdiction in which such qualification is required by law,
other than those jurisdictions as to which the failure to be
so qualified or in good standing could not, individually or
in the aggregate, reasonably be expected to have a Material
Adverse Effect.  Such Obligor has the corporate power and
authority to own or hold under lease the Properties
(including, without limitation, the Assets) it purports to
own or hold under lease, or proposes to own or hold under
lease, to transact the business it transacts and proposes to
transact, to execute and deliver the Financing Documents to
which it is a party and to perform the provisions thereof.

5.2  Authorization, etc.

Each Transaction Document to which such Obligor is a party
has been duly authorized by all necessary corporate action
on the part of such Obligor, and upon execution and delivery
thereof each such Transaction Document will constitute, a
legal, valid and binding obligation of such Obligor
enforceable against such Obligor in accordance with its
terms, except as such enforceability may be limited by (i)
applicable bankruptcy, insolvency, reorganization,
moratorium or other similar laws affecting the enforcement
of creditors' rights generally and (ii) general principles
of equity (regardless of whether such enforceability is
considered in a proceeding in equity or at law).

5.3  Disclosure

The Company, through its agent, New Harbor Incorporated, has
delivered to you and each Other Purchaser a copy of a
Confidential Information Memorandum, dated April 2003 (the
Memorandum), relating to the Acquisition and the
transactions contemplated hereby.  The Memorandum fairly
describes, in all material respects, the Assets and the
general nature of the business and principal Properties of
the Obligors and their Subsidiaries.  Except as disclosed in
Schedule C, this Agreement, the Memorandum, the documents,
certificates or other writings delivered to you by or on
behalf of the Obligors in connection with the transactions
contemplated hereby, taken as a whole and giving effect to
the transactions contemplated hereby and thereby, do not
contain any untrue statement of a material fact or omit to
state any material fact necessary to make the statements
therein not misleading in light of the circumstances under
which they were made.  Except as disclosed in the Memorandum
or as expressly described in Schedule C, or in one of the
documents, certificates or other writings identified
therein, since October 9, 2002, there has been no change in
the financial condition, operations, business, Properties or
prospects of any Obligor or any Subsidiary of the Company
except changes that individually or in the aggregate could
not reasonably be expected to have a Material Adverse
Effect.  There is no fact known to such Obligor that could
reasonably be expected to have a Material Adverse Effect
that has not been set forth herein or in the Memorandum or
in the other documents, certificates and other writings

                                                                 Page 6


delivered to you by or on behalf of the Obligors
specifically for use in connection with the transactions
contemplated hereby.

5.4  Organization and Ownership of Shares of Subsidiaries

(a)  Schedule D contains (except as noted therein) complete
     and correct lists (i) of each Obligor's Subsidiaries,
     showing, as to each Subsidiary, the correct name thereof,
     the jurisdiction of its organization, and the percentage of
     shares of each class of its capital stock or similar equity
     interests outstanding owned by the Company and each other
     Subsidiary, (ii) of each Obligor's directors and senior
     officers, and (iii) of the Obligors' Affiliates, other than
     Subsidiaries.

(b)  All of the outstanding shares of capital stock or
     similar equity interests of each Subsidiary shown in
     Schedule D as being owned by an Obligor and its Subsidiaries
     have been validly issued, are fully paid and nonassessable
     and are owned by such Obligor or another Subsidiary free and
     clear of any Lien (except as otherwise disclosed in Schedule
     D).

(c)  Each Subsidiary identified in Schedule D is a
     corporation or other legal entity duly organized, validly
     existing and in good standing under the laws of its
     jurisdiction of organization, and is duly qualified as a
     foreign corporation or other legal entity and is in good
     standing in each jurisdiction in which such qualification is
     required by law, other than those jurisdictions as to which
     the failure to be so qualified or in good standing could
     not, individually or in the aggregate, reasonably be
     expected to have a Material Adverse Effect.  Each such
     Subsidiary has the corporate or other power and authority to
     own or hold under lease the Properties it purports to own or
     hold under lease and to transact the business it transacts
     and proposes to transact.

(d)  No Subsidiary of the Company is a party to, or
     otherwise subject to any legal restriction or any agreement
     (other than this Agreement, the agreements listed on
     Schedule D and customary limitations imposed by corporate
     law statutes) restricting the ability of such Subsidiary to
     pay dividends out of profits or make any other similar
     distributions of profits to the Company or any of its
     Subsidiaries that owns outstanding shares of capital stock
     or similar equity interests of such Subsidiary.

5.5  Compliance with Laws, Other Instruments, etc.

The execution, delivery and performance by each Obligor of
each Transaction Document to which it is a party will not
(i) contravene, result in any breach of, or constitute a
default under, or result in the creation of any Lien in
respect of any Property of such Obligor or any Subsidiary of
the Company under, any indenture, mortgage, deed of trust,
loan, purchase or credit agreement, lease, corporate charter
or by-laws, or any other agreement or instrument to which
such Obligor or any Subsidiary of the Company is bound or by
which such Obligor or any Subsidiary of the Company or any
of their respective

                                                                 Page 7


Properties may be bound or affected, (ii) conflict with or
result in a breach of any of the terms, conditions or provisions
of any order, judgment, decree, or ruling of any court,
arbitrator or Governmental Authority applicable to such Obligor
or any Subsidiary of the Company or (iii) violate any provision
of any statute or other rule or regulation of any Governmental
Authority applicable to such Obligor or any Subsidiary of the
Company.

5.6  Governmental Authorizations, etc.

No consent, approval or authorization of, or registration,
filing or declaration with, any Governmental Authority is
required in connection with the execution, delivery or
performance by any Obligor of any Transaction Document to
which such Obligor is a party except for such approvals as
have been obtained and which are in full force and effect.

5.7  Litigation; Observance of Agreements, Statutes and
Orders

(a)  Except as disclosed in Schedule E, there are no
     actions, suits or proceedings pending or, to the knowledge
     of any Obligor, threatened against or affecting any Obligor
     or any Subsidiary of the Company or any Property of any
     Obligor or any Subsidiary of the Company in any court or
     before any arbitrator of any kind or before or by any
     Governmental Authority that, individually or in the
     aggregate, could reasonably be expected to have a Material
     Adverse Effect.

(b)  No Obligor and no Subsidiary is in default under any
     term of any agreement or instrument to which it is a party
     or by which it is bound, or any order, judgment, decree or
     ruling of any court, arbitrator or Governmental Authority or
     is in violation of any applicable law, ordinance, rule or
     regulation (including without limitation Environmental Laws)
     of any Governmental Authority, which default or violation,
     individually or in the aggregate, could reasonably be
     expected to have a Material Adverse Effect.

5.8  Taxes

Such Obligor and the Subsidiaries of the Company have filed
all tax returns that are required to have been filed in any
jurisdiction, and have paid all taxes shown to be due and
payable on such returns and all other taxes and assessments
levied upon them or their properties, assets, income or
franchises, to the extent such taxes and assessments have
become due and payable and before they have become
delinquent, except for any taxes and assessments (i) the
amount of which is not individually or in the aggregate
Material or (ii) the amount, applicability or validity of
which is currently being contested in good faith by
appropriate proceedings and with respect to which such
Obligor or Subsidiary of the Company, as the case may be,
has established adequate reserves in accordance with GAAP.
Such Obligor knows of no basis for any other tax or
assessment that could reasonably be expected to have a
Material Adverse Effect.  The charges, accruals and reserves
on the books of such Obligor and the Subsidiaries of the
Company in respect of Federal, state or other taxes for all
fiscal periods are adequate.

                                                                 Page 8


5.9  Title to Property; Leases

Such Obligor and the Subsidiaries of the Company have and,
after giving effect to the Acquisition, will have good and
sufficient title to their respective properties that
individually or in the aggregate are Material, including all
such properties purported to have been acquired by such
Obligor or any Subsidiary of the Company pursuant to the
GasCo Purchase Agreement (except as sold or otherwise
disposed of in the ordinary course of business), in each
case free and clear of Liens prohibited by this Agreement.
All leases that individually or in the aggregate are
Material are valid and subsisting and are in full force and
effect in all material respects.

5.10 Licenses, Permits, etc.

Except as disclosed in Schedule F:

(a)  such Obligor and the Subsidiaries of the Company own or
     possess all licenses, permits, franchises, authorizations,
     patents, copyrights, service marks, trademarks and trade
     names, or rights thereto, that individually or in the
     aggregate are Material, without known conflict with the
     rights of others;

(b)  to the best knowledge of such Obligor, no product of
     such Obligor infringes in any material respect any license,
     permit, franchise, authorization, patent, copyright, service
     mark, trademark, trade name or other right owned by any
     other Person; and

(c)  to the best knowledge of such Obligor, there is no
     Material violation by any Person of any right of such
     Obligor or any Subsidiary of the Company with respect to any
     patent, copyright, service mark, trademark, trade name or
     other right owned or used by such Obligor or any Subsidiary
     of the Company.

5.11 Compliance with ERISA

(a)  Such Obligor and each ERISA Affiliate have operated and
     administered each Plan in compliance with all applicable
     laws except for such instances of noncompliance as have not
     resulted in and could not reasonably be expected to result
     in a Material Adverse Effect.  Neither such Obligor nor any
     ERISA Affiliate has incurred any liability pursuant to Title
     I or IV of ERISA (other than claims for benefits in the
     ordinary course or PBGC premiums required by Title IV of
     ERISA) or the penalty or excise tax provisions of the Code
     relating to employee benefit plans (as defined in Section 3
     of ERISA), and no event, transaction or condition has
     occurred or exists that could reasonably be expected to
     result in the incurrence of any such liability by such
     Obligor or any ERISA Affiliate, or in the imposition of any
     Lien on any of the rights, Properties or assets of such
     Obligor or any ERISA Affiliate, in either case pursuant to
     Title I or IV of ERISA or to such penalty or excise tax
     provisions or to Section 401(a)(29) or 412

                                                                 Page 9


     of the Code, other than such liabilities or Liens as would
     not be individually or in the aggregate Material.

(b)  The present value of the aggregate benefit liabilities
     under each of such Obligor's Plans (other than Multiemployer
     Plans), determined as of the end of such Plan's most
     recently ended plan year on the basis of the actuarial
     assumptions specified for funding purposes in such Plan's
     most recent actuarial valuation report, did not exceed the
     aggregate current value of the assets of such Plan allocable
     to such benefit liabilities by more than $14,000,000 in the
     case of any single Plan and by more than $20,000,000 in the
     aggregate for all Plans.   The term "benefit liabilities"
     has the meaning specified in section 4001 of ERISA and the
     terms "current value" and "present value" have the meaning
     specified in section 3 of ERISA.

(c)  Such Obligor and its ERISA Affiliates have not incurred
     withdrawal liabilities (and are not subject to contingent
     withdrawal liabilities) under section 4201 or 4204 of ERISA
     in respect of Multiemployer Plans that individually or in
     the aggregate are Material.

(d)  The expected postretirement benefit obligation
     (determined as of the last day of such Obligor's most
     recently ended fiscal year in accordance with Financial
     Accounting Standards Board Statement No. 106, without regard
     to liabilities attributable to continuation coverage
     mandated by section 4980B of the Code) of such Obligor and
     its Subsidiaries is not Material.

(e)  The execution and delivery of this Agreement and the
     issuance and sale of the Notes hereunder will not involve
     any non-exempt transaction that is: (i) subject to the
     prohibitions of section 406 of ERISA; or (ii) in connection
     with which a tax could be imposed pursuant to section
     4975(c)(1)(A)-(D) of the Code.  The representation in the
     first sentence of this Section 5.12(e) is made in reliance
     upon and subject to the accuracy of your representation in
     Section 6.2 as to the sources of the funds used to pay the
     purchase price of the Notes to be purchased by you.

5.12 Private Offering by the Company

Neither the Company nor the Guarantor nor anyone acting on
its or their behalf has offered the Notes, the Guaranties or
any similar securities for sale to, or solicited any offer
to buy any of the same from, or otherwise approached or
negotiated in respect thereof with, any person other than
you, the Other Purchasers and not more than 2 other
Institutional Investors, each of which has been offered the
Notes and the Guaranties at a private sale for investment.
Neither the Company nor anyone acting on its behalf has
taken, or will take, any action that would subject the
issuance or sale of the Notes to the registration
requirements of Section 5 of the Securities Act.

5.13 Use of Proceeds; Margin Regulations

                                                                 Page 10


The Company will apply the proceeds of the sale of the Notes
to consummate the Acquisition.  No part of the proceeds from
the sale of the Notes hereunder will be used, directly or
indirectly, for the purpose of buying or carrying any margin
stock within the meaning of Regulation U of the Board of
Governors of the Federal Reserve System (12 CFR 221), or for
the purpose of buying or carrying or trading in any
securities under such circumstances as to involve the
Company in a violation of Regulation X of said Board (12 CFR
224) or to involve any broker or dealer in a violation of
Regulation T of said Board (12 CFR 220).  Margin stock does
not constitute any of the consolidated assets of the Company
and its Subsidiaries and the Company does not have any
present intention to acquire margin stock.   As used in this
Section 5.13, the terms "margin stock" and "purpose of
buying or carrying" shall have the meanings assigned to them
in said Regulation U.

5.14 Existing Indebtedness

(a)  Except as described therein, Schedule G-1 sets forth a
     complete and correct list of all outstanding Indebtedness of
     each Obligor and each Subsidiary of the Company.  Except as
     described therein, Schedule G-2 sets forth a complete and
     correct list of all outstanding Indebtedness to be assumed
     by the Company pursuant to the GasCo Purchase Agreement and
     the transactions contemplated thereby.   Neither such
     Obligor nor any such Subsidiary is in default and no waiver
     of default is currently in effect, in the payment of any
     principal or interest on any Indebtedness of such Obligor or
     such Subsidiary and no event or condition exists with
     respect to any Indebtedness of such Obligor or any such
     Subsidiary that would permit (or that with notice or the
     lapse of time, or both, would permit) one or more Persons to
     cause such Indebtedness to become due and payable before its
     stated maturity or before its regularly scheduled dates of
     payment.

(b)  Except as disclosed in Schedule G-1, neither the
     Company nor any of its Subsidiaries has agreed or consented
     to cause or permit in the future (upon the happening of a
     contingency or otherwise) any of its property, whether now
     owned or hereafter acquired, to be subject to a Lien not
     permitted by Section 10.3.

5.15 Foreign Assets Control Regulations, etc.

Neither the sale of the Notes by the Company hereunder nor
its use of the proceeds thereof will violate the Trading
with the Enemy Act, as amended, or any of the foreign assets
control regulations of the United States Treasury Department
(31 CFR, Subtitle B, Chapter V, as amended) or any enabling
legislation or executive order relating thereto.

5.16 Status under Certain Statutes

Neither the Company nor any Subsidiary of the Company is
subject to regulation under the Investment Company Act of
1940, as amended, or the Interstate Commerce Act, as
amended.  Each Obligor and its Subsidiaries are exempt from
regulation under PUHCA, except as set forth in
Section 9(a)(2) thereof.

                                                                 Page 11


5.17 Environmental Matters

Neither the Company nor any Subsidiary has knowledge of any
claim or has received any notice of any claim, and no
proceeding has been instituted raising any claim against the
Company or any of its Subsidiaries or any of their
respective real Properties now or formerly owned, leased or
operated by any of them or other assets, alleging any damage
to the environment or violation of any Environmental Laws,
except, in each case, such as could not reasonably be
expected to result in a Material Adverse Effect.  Except as
otherwise disclosed to you in writing:

(a)  neither the Company nor any Subsidiary has knowledge of
     any facts which would give rise to any claim, public or
     private, of violation of Environmental Laws or damage to the
     environment emanating from, occurring on or in any way
     related to real Properties now or formerly owned, leased or
     operated by any of them, or in any way related to the
     Assets, or to other assets or their use, except, in each
     case, such as could not reasonably be expected to result in
     a Material Adverse Effect;

(b)  neither the Company nor any of its Subsidiaries has
     stored any Hazardous Materials on real Properties now or
     formerly owned, leased or operated by any of them and has
     not disposed of any Hazardous Materials in a manner contrary
     to any Environmental Laws in each case in any manner that
     could reasonably be expected to result in a Material Adverse
     Effect; and

(c)  all buildings on all real Properties now owned, leased
     or operated by the Company or any of its Subsidiaries are in
     compliance with applicable Environmental Laws, except where
     failure to comply could not reasonably be expected to result
     in a Material Adverse Effect.

5.18 Acquisition Transaction

(a)  To the best knowledge of such Obligor, the
     representations and warranties made by Citizens in the GasCo
     Purchase Agreement were true and correct when made and
     remain true and correct as of the date hereof.

(b)  All Governmental Approvals necessary under applicable
     Governmental Rules to be obtained by UniSource Energy or any
     of its Affiliates in connection with the due execution and
     delivery of, and performance by UniSource Energy or such
     Affiliate of its obligations, and the exercise of its
     rights, under the GasCo Purchase Agreement have been duly
     obtained, have been validly issued and are in full force and
     effect.  The order of the Federal Energy Regulatory
     Commission issued May 21, 2003 authorizing disposition of
     jurisdictional facilities, the order of the ACC issued
     July 3, 2003 approving the ACC Settlement Agreement and the
     order of the Securities and Exchange Commission issued
     August 1, 2003 authorizing the acquisition by UniSource
     Energy and the Guarantor of all of the common stock of the
     Company are each final and in full force and effect.

                                                                 Page 12


(c)  With respect to such Obligor and its Affiliates, the
     GasCo Purchase Agreement and each other agreement
     implementing the transactions contemplated thereby has been
     duly executed and delivered by the parties named therein,
     is in full force and effect and no material default exists
     thereunder.  With respect to each party thereto that is not
     an Affiliate of such Obligor, to the best knowledge of such
     Obligor, the GasCo Purchase Agreement and each other
     agreement implementing the transactions contemplated thereby
     has been duly executed and delivered by such party, is in
     full force and effect and no material default exists
     thereunder.

5.19 Anti-Terrorism Order

Neither such Obligor nor any Subsidiary of the Company is a
Sanctioned Person.  To the best knowledge of such Obligor,
neither such Obligor nor any Subsidiary of the Company has
any legally binding contracts or agreements with any
Sanctioned Person.

6.   REPRESENTATIONS OF THE PURCHASER

6.1  Purchase for Investment

You represent that you are purchasing the Notes for your own
account or for one or more separate accounts maintained by
you or for the account of one or more pension or trust funds
and not with a view to the distribution thereof, provided
that the disposition of your or their Property shall at all
times be within your or their control.  You understand that
the Notes have not been registered under the Securities Act
and may be resold only if registered pursuant to the
provisions of the Securities Act or if an exemption from
registration is available, except under circumstances where
neither such registration nor such an exemption is required
by law, and that the Company is not required to register the
Notes.

6.2  Source of Funds

You represent that at least one of the following statements
is an accurate representation as to each source of funds (a
Source) to be used by you to pay the purchase price of the
Notes to be purchased by you hereunder:

(a)  if you are an insurance company, the Source does not
     include assets allocated to any separate account maintained
     by you in which any employee benefit plan (or its related
     trust) has any interest, other than a separate account that
     is maintained solely in connection with your fixed
     contractual obligations under which the amounts payable, or
     credited, to such plan and to any participant or beneficiary
     of such plan (including any annuitant) are not affected in
     any manner by the investment performance of the separate
     account; or

(b)  the Source is an "insurance company general account"
     (as the term is defined in Prohibited Transaction Exemption
     (PTE) 95-60 (issued July 12, 1995)) in respect of which the
     reserves and liabilities (as defined by the annual statement
     for life

                                                                 Page 13


     insurance companies approved by the National Association of
     Insurance Commissioners (the NAIC Annual Statement)) for the
     general account contract(s) held by or on behalf of any employee
     benefit plan together with the amount of the reserves and
     liabilities for the general account contract(s) held by or on
     behalf of any other employee benefit plans maintained by the
     same employer (or affiliate thereof as defined in PTE 95-60) or
     by the same employee organization in the general account do
     not exceed 10% of the total reserves and liabilities of the
     general account (exclusive of separate account liabilities) plus
     surplus as set forth in the NAIC Annual Statement filed with
     such Purchaser's state of domicile; or

(c)  the Source is either (i) an insurance company pooled
     separate account, within the meaning of Prohibited
     Transaction Exemption ("PTE") 90-1 (issued January 29,
     1990), or (ii) a bank collective investment fund, within the
     meaning of the PTE 91-38 (issued July 12, 1991) and, except
     as you have disclosed to the Company in writing pursuant to
     this paragraph (c), no employee benefit plan or group of
     plans maintained by the same employer or employee
     organization beneficially owns more than 10% of all assets
     allocated to such pooled separate account or collective
     investment fund; or

(d)  the Source constitutes assets of an "investment fund"
     (within the meaning of Part V of the QPAM Exemption) managed
     by a "qualified professional asset manager" or "QPAM"
     (within the meaning of Part V of the QPAM Exemption), no
     employee benefit plan's assets that are included in such
     investment fund, when combined with the assets of all other
     employee benefit plans established or maintained by the same
     employer or by an affiliate (within the meaning of Section
     V(c)(1) of the QPAM Exemption) of such employer or by the
     same employee organization and managed by such QPAM, exceed
     20% of the total client assets managed by such QPAM, the
     conditions of Part I(c) and (g) of the QPAM Exemption are
     satisfied, neither the QPAM nor a person controlling or
     controlled by the QPAM (applying the definition of "control"
     in Section V(e) of the QPAM Exemption) owns a 5% or more
     interest in the Company and (i) the identity of such QPAM
     and (ii) the names of all employee benefit plans whose
     assets are included in such investment fund have been
     disclosed to the Company in writing pursuant to this
     paragraph (d); or

(e)  the Source is a governmental plan; or

(f)  the Source is one or more employee benefit plans, or a
     separate account or trust fund comprised of one or more
     employee benefit plans, each of which has been identified to
     the Company in writing pursuant to this paragraph (f); or

(g)  the Source does not include assets of any employee
     benefit plan, other than a plan exempt from the coverage of
     ERISA.

                                                                 Page 14


As used in this Section 6.2, the terms employee benefit
plan, governmental plan, party in interest and separate
account shall have the respective meanings assigned to such
terms in Section 3 of ERISA.

7.   INFORMATION AS TO OBLIGORS

7.1  Financial and Business Information

Each Obligor shall deliver to each Noteholder that is an
Institutional Investor:

(a)  Quarterly Statements - within 60 days after the end of
     each quarterly fiscal period in each fiscal year of such
     Obligor (other than the last quarterly fiscal period of each
     such fiscal year), duplicate copies of,

        (i)   a consolidated balance sheet of such Obligor and its
              Subsidiaries as at the end of such quarter,

        (ii)  consolidated statements of income of such Obligor and
              its Subsidiaries, for such quarter and (in the case of the
              second and third quarters) for the portion of the fiscal
              year ending with such quarter, and

        (iii) consolidated statements of cash flow for the period from
              the beginning of such fiscal year to the end of such
              quarter,

     setting forth in each case in comparative form the
     figures for the corresponding periods in the previous
     fiscal year, all in reasonable detail, prepared in
     accordance with GAAP applicable to quarterly financial
     statements generally, and certified by a Senior
     Financial Officer of such Obligor as fairly presenting,
     in all material respects, the financial position of the
     companies being reported on and their results of
     operations and cash flows, subject to changes resulting
     from year-end adjustments, provided that delivery
     within the time period specified above of copies of
     such Obligor's Quarterly Report on Form 10-Q prepared
     in compliance with the requirements therefor and filed
     with the Securities and Exchange Commission shall be
     deemed to satisfy the requirements of this Section
     7.1(a);

(b)  Annual Statements - within 105 days after the end of
     each fiscal year of such Obligor, duplicate copies of,

        (i)   a consolidated balance sheet of such Obligor and its
              Subsidiaries, as at the end of such year, and

        (ii)  consolidated statements of income, changes in
              shareholders' equity and cash flows of such Obligor and its
              Subsidiaries, for such year, setting forth in each case in
              comparative form the figures for the previous fiscal year,
              all in reasonable detail, prepared in accordance with GAAP,
              and accompanied

                                                                 Page 15


          (A)  by an opinion thereon of independent certified public
               accountants of recognized national standing, which opinion
               shall state that such financial statements present fairly,
               in all material respects, the financial position of the
               companies being reported upon and their results of
               operations and cash flows and have been prepared in
               conformity with GAAP, and that the examination of such
               accountants in connection with such financial statements has
               been made in accordance with generally accepted auditing
               standards, and that such audit provides a reasonable basis
               for such opinion in the circumstances, and

          (B)  a certificate of such accountants stating that they
               have reviewed this Agreement and stating further whether, in
               making their audit, they have become aware of any condition
               or event that then constitutes a Default or an Event of
               Default resulting from a breach of the provisions of any of
               Sections 10.4(c), 10.5 and 10.6 hereof, and, if they are
               aware that any such condition or event then exists,
               specifying the nature and period of the existence thereof
               (it being understood that such accountants shall not be
               liable, directly or indirectly, for any failure to obtain
               knowledge of any Default or Event of Default),
               provided that the delivery within the time period specified
               above of such Obligor's Annual Report on Form 10-K for such
               fiscal year (together with such Obligor's annual report to
               shareholders, if any, prepared pursuant to Rule 14a-3 under
               the Exchange Act) prepared in accordance with the
               requirements therefor and filed with the Securities and
               Exchange Commission, together with the accountant's
               certificate described in clause (B) above, shall be deemed
               to satisfy the requirements of this Section 7.1(b);

(c)  SEC and Other Reports - promptly upon their becoming
     available, one copy of (i) each financial statement, report,
     notice or proxy statement sent by such Obligor or any
     Subsidiary to public securities holders generally, and (ii)
     each regular or periodic report, each registration statement
     (without exhibits except as expressly requested by such
     Noteholder), and each prospectus and all amendments thereto
     filed by such Obligor or any Subsidiary with the Securities
     and Exchange Commission and of all press releases and other
     statements made available generally by such Obligor or any
     Subsidiary to the public concerning developments that are
     Material;

(d)  Notice of Default or Event of Default - promptly, and
     in any event within five days after a Responsible Officer
     becoming aware of the existence of any Default or Event of
     Default or that any Person has given any notice or taken any
     action with respect to a claimed default hereunder or that
     any Person has given any notice or taken any action with
     respect to a claimed default of the type referred to in
     Section 12(g), a written notice specifying the nature and
     period of existence

                                                                 Page 16


     thereof and what action the Company or the Guarantor, as the
     case may be, is taking or proposes to take with respect thereto;

(e)  ERISA Matters - promptly, and in any event within five
     days after a Responsible Officer becoming aware of any of
     the following, a written notice setting forth the nature
     thereof and the action, if any, that the Company (or the
     Guarantor, as the case may be), or an ERISA Affiliate
     proposes to take with respect thereto:

        (i)   with respect to any Plan, any reportable event, as
              defined in section 4043(b) of ERISA and the regulations
              thereunder, for which notice thereof has not been waived
              pursuant to such regulations as in effect on the date
              hereof; or

        (ii)  the taking by the PBGC of steps to institute, or the
              threatening by the PBGC of the institution of, proceedings
              under section 4042 of ERISA for the termination of, or the
              appointment of a trustee to administer, any Plan, or the
              receipt by any Obligor or any ERISA Affiliate of a notice
              from a Multiemployer Plan that such action has been taken by
              the PBGC with respect to such Multiemployer Plan; or

        (iii) any event, transaction or condition that could
              result in the incurrence of any liability by any Obligor or
              any ERISA Affiliate pursuant to Title I or IV of ERISA
              (other than claims in the ordinary course or PBGC premiums
              required by Title IV of ERISA) or the penalty or excise tax
              provisions of the Code relating to employee benefit plans,
              or in the imposition of any Lien on any of the rights,
              properties or assets of such Obligor or any ERISA Affiliate
              pursuant to Title I or IV of ERISA or such penalty or excise
              tax provisions, if such liability or Lien, taken together
              with any other such liabilities or Liens then existing,
              could reasonably be expected to have a Material Adverse
              Effect;

(f)  Notices from Governmental Authority - promptly, and in
     any event within 30 days of receipt thereof, copies of any
     notice to any Obligor or any Subsidiary from any Federal or
     state Governmental Authority relating to any order, ruling,
     statute or other law or regulation that could reasonably be
     expected to have a Material Adverse Effect;

(g)  ACC Communications - promptly, and in any event within
     30 days of receipt thereof, copies of any Material
     communication to any Obligor or any Subsidiary from the ACC
     or any Material filing by such Obligor or Subsidiary with
     the ACC relating to any breach of the ACC Settlement
     Agreement or any matter that could reasonably be expected to
     cause or constitute a Material Adverse Effect; and

(h)  Requested Information - with reasonable promptness,
     such other data and information relating to the business,
     operations, affairs, financial condition, assets or
     properties of each Obligor or any of its Subsidiaries or
     relating to the ability of

                                                                 Page 17


     such Obligor to perform its obligations under the Financing
     Documents to which it is a party as from time to time may be
     reasonably requested by any such Noteholder.

7.2  Officer's Certificate

Each set of financial statements delivered to a Noteholder
pursuant to Section 7.1(a) or Section 7.1(b) hereof shall be
accompanied by a certificate of a Senior Financial Officer
of the Obligor delivering such financial statements setting
forth:

(a)  Covenant Compliance - if such Obligor is the Company,
     the information (including detailed calculations) required
     in order to establish whether the Company was in compliance
     with the requirements of Section 10.6 hereof during the
     quarterly or annual period covered by the statements then
     being furnished (including with respect to such Section the
     calculations of the minimum amount permissible under the
     terms of such Section, and the calculation of the amount
     then in existence); and

(b)  Event of Default - a statement that such officer has
     reviewed the relevant terms hereof and has made, or caused
     to be made, under his or her supervision, a review of the
     transactions and conditions of such Obligor and, if such
     Obligor is the Company, its Subsidiaries from the beginning
     of the quarterly or annual period covered by the statements
     then being furnished to the date of the certificate and that
     such review shall not have disclosed the existence during
     such period of any condition or event that constitutes a
     Default or an Event of Default or, if any such condition or
     event existed or exists (including, without limitation, any
     such event or condition resulting from the failure of the
     Company or any Subsidiary of the Company to comply with any
     Environmental Law), specifying the nature and period of
     existence thereof and what action such Obligor shall have
     taken or proposes to take with respect thereto.

7.3  Inspection

Each Obligor shall permit the representatives of each
Noteholder that is an Institutional Investor:

(a)  No Default - if no Default or Event of Default then
     exists, at the expense of such Noteholder and upon
     reasonable prior notice to such Obligor, to visit the
     principal executive office of such Obligor, to discuss the
     affairs, finances and accounts of such Obligor and the
     Subsidiaries of the Company with such Obligor's officers,
     and (with the consent of such Obligor, which consent will
     not be unreasonably withheld) its independent public
     accountants, and (with the consent of such Obligor, which
     consent will not be unreasonably withheld) to visit the
     other offices and properties of such Obligor and the
     Subsidiaries of the Company, all at such reasonable times
     and as often as may be reasonably requested in writing; and

                                                                 Page 18


(b)  Default - if a Default or Event of Default then exists,
     at the expense of such Obligor to visit and inspect any of
     the offices or Properties of such Obligor or any Subsidiary
     of the Company, to examine all their respective books of
     account, records, reports and other papers, to make copies
     and extracts therefrom, and to discuss their respective
     affairs, finances and accounts with their respective
     officers and independent public accountants (and by this
     provision such Obligor authorizes said accountants to
     discuss the affairs, finances and accounts of such Obligor
     and the Subsidiaries of the Company), all at such times and
     as often as may be requested.

8.   PREPAYMENT OF THE NOTES

8.1  Optional Prepayments with Make-Whole Amount

The Company may, at its option, upon notice as provided
below, prepay at any time all, or from time to time any part
of, any Series of the Notes, in an amount not less than
$5,000,000 in the case of a partial prepayment, at 100% of
the principal amount so prepaid, plus the Make-Whole Amount
determined for the prepayment date with respect to such
principal amount.  The Company will give each holder of such
Series of Notes written notice of each optional prepayment
under this Section 8.1 not less than 30 days and not more
than 60 days prior to the date fixed for such prepayment.
Each such notice shall specify such date, the aggregate
principal amount of the Series of Notes to be prepaid on
such date, the Series and principal amount of each Note held
by such holder to be prepaid (determined in accordance with
Section 8.2), and the interest to be paid on the prepayment
date with respect to such principal amount being prepaid,
and shall be accompanied by a certificate of a Senior
Financial Officer of the Company as to the estimated Make-
Whole Amount due in connection with such prepayment
(calculated as if the date of such notice were the date of
the prepayment), setting forth the details of such
computation.  Two Business Days prior to such prepayment,
the Company shall deliver to each holder of Notes of the
Series to be prepaid a certificate of a Senior Financial
Officer of the Company specifying the calculation of such
Make-Whole Amount as of the specified prepayment date.

8.2  Allocation of Partial Prepayments

In the case of each partial prepayment of any Series, the
principal amount of the Notes of such Series to be prepaid
shall be allocated among all of the Notes of such Series at
the time outstanding in proportion, as nearly as
practicable, to the respective unpaid principal amounts
thereof not theretofore called for prepayment.

8.3  Maturity; Surrender, etc.

In the case of each prepayment of Notes pursuant to this
Section 8, the principal amount of each Note to be prepaid
shall mature and become due and payable on the date fixed
for such prepayment, together with interest on such
principal amount accrued to such date and the applicable
Make-Whole Amount or Modified Make-Whole Amount (as the case

                                                                 Page 19


may be), if any.  From and after such date, unless the
Company shall fail to pay such principal amount when so due
and payable, together with the interest and Make-Whole
Amount or Modified Make-Whole Amount (as the case may be),
if any, as aforesaid, interest on such principal amount
shall cease to accrue.  Any Note paid or prepaid in full
shall be surrendered to the Company and cancelled and shall
not be reissued, and no Note shall be issued in lieu of any
prepaid principal amount of any Note.

8.4  Change of Control

Promptly, and in any event within five (5) Business Days
after the occurrence of a Change of Control, the Company
will give written notice thereof to each Noteholder (each
such notice, a Change of Control Notice), which notice shall
(i) refer specifically to this Section 8.4 and describe such
Change of Control in reasonable detail, (ii) specify the
Change of Control Prepayment Date (which date shall be not
less than forty five (45) days and not more than sixty (60)
days after the date of the giving of such Change of Control
Notice) and the Response Date in respect thereof and (iii)
offer to prepay all Notes at 100% of the unpaid principal
amount of such Notes, together with interest accrued thereon
to the Change of Control Prepayment Date.  Each Noteholder
shall notify the Company of such Noteholder's acceptance or
rejection of such offer by giving written notice of such
acceptance or rejection to the Company no later than the
Response Date, and the Company shall prepay on the Change of
Control Prepayment Date all of the Notes held by each
Noteholder who has accepted such offer in accordance with
this Section 8.4 at a price in respect of each Note held by
such Noteholder equal to 100% of the unpaid principal amount
of such Note, together with interest accrued thereon to the
Change of Control Prepayment Date, plus the Modified Make-
Whole Amount determined for the Change of Control Prepayment
Date with respect to such principal amount; provided that
the failure by any Noteholder to respond to such offer in
writing on or before the Response Date shall be deemed to be
an acceptance of such offer in respect of such Change of
Control.

8.5  Purchase of Notes

The Company will not and will not permit any Affiliate to
purchase, redeem, prepay or otherwise acquire, directly or
indirectly, any of the outstanding Notes except upon the
payment or prepayment of the Notes in accordance with the
terms of this Agreement and the Notes.  The Company will
promptly cancel all Notes acquired by it or any Affiliate
pursuant to any payment, prepayment or purchase of Notes
pursuant to any provision of this Agreement and no Notes may
be issued in substitution or exchange for any such Notes.

8.6  Make-Whole Amount

The term Make-Whole Amount means, with respect to any Note,
an amount equal to the excess, if any, of the Discounted
Value of the Remaining Scheduled Payments with respect to
the Called Principal of such Note over the amount of such
Called Principal, provided that the Make-Whole Amount may in
no event be less than zero.  For the

                                                                 Page 20


purposes of determining the Make-Whole Amount, the following
terms have the following meanings:

     Called Principal means, with respect to any Note, the
     principal of such Note that is to be prepaid pursuant
     to Section 8.1 or 8.4, or has become or is declared to
     be immediately due and payable pursuant to Section
     13.1, as the context requires.

     Discounted Value means, with respect to the Called
     Principal of any Note, the amount obtained by
     discounting all Remaining Scheduled Payments with
     respect to such Called Principal from their respective
     scheduled due dates to the Settlement Date with respect
     to such Called Principal, in accordance with accepted
     financial practice and at a discount factor (applied on
     the same periodic basis as that on which interest on
     the Notes is payable) equal to the Reinvestment Yield
     with respect to such Called Principal.

     Reinvestment Yield means, with respect to the Called
     Principal of any Note, 50 basis points over the yield
     to maturity  implied by (i) the yields reported, as of
     10:00 A.M. (New York City time) on the second Business
     Day preceding the Settlement Date with respect to such
     Called Principal, on the display designated as "Page
     678"  on the Telerate Access Service (or such other
     display as may replace Page 678 on Telerate Access
     Service) for actively traded U.S. Treasury securities
     having a maturity equal to the Remaining Average Life
     of such Called Principal as of such Settlement Date, or
     (ii) if such yields are not reported as of such time or
     the yields reported as of such time are not
     ascertainable, the Treasury Constant Maturity Series
     Yields reported, for the latest day for which such
     yields have been so reported as of the second Business
     Day preceding the Settlement Date with respect to such
     Called Principal, in Federal Reserve Statistical
     Release H.15 (519) (or any comparable successor
     publication) for actively traded U.S. Treasury
     securities having a constant maturity equal to the
     Remaining Average Life of such Called Principal as of
     such Settlement Date.  Such implied yield will be
     determined, if necessary, by (a) converting U.S.
     Treasury bill quotations to bond-equivalent yields in
     accordance with accepted financial practice and (b)
     interpolating linearly between (1) the actively traded
     U.S. Treasury security with the duration closest to and
     greater than the Remaining Average Life and (2) the
     actively traded U.S. Treasury security with the
     duration closest to and less than the Remaining Average
     Life.

     Remaining Average Life means, with respect to any
     Called Principal, the number of years (calculated to
     the nearest one-twelfth year) obtained by dividing (i)
     such Called Principal into (ii) the sum of the products
     obtained by multiplying (a) the principal component of
     each Remaining Scheduled Payment with respect to such
     Called Principal by (b) the number of years (calculated
     to the nearest one-twelfth year) that will elapse
     between the Settlement Date with respect to such Called
     Principal and the scheduled due date of such Remaining
     Scheduled Payment.

                                                                 Page 21


     Remaining Scheduled Payments means, with respect to the
     Called Principal of any Note, all payments of such
     Called Principal and interest thereon that would be due
     after the Settlement Date with respect to such Called
     Principal if no payment of such Called Principal were
     made prior to its scheduled due date, provided that if
     such Settlement Date is not a date on which interest
     payments are due to be made under the terms of the
     Notes, then the amount of the next succeeding scheduled
     interest payment will be reduced by the amount of
     interest accrued to such Settlement Date and required
     to be paid on such Settlement Date pursuant to Section
     8.1, 8.4 or 13.1.

     Settlement Date means, with respect to the Called
     Principal of any Note, the date on which such Called
     Principal is to be prepaid pursuant to Section 8.1 or
     8.4, or has become or is declared to be immediately due
     and payable pursuant to Section 13.1, as the context
     requires.

9.   AFFIRMATIVE COVENANTS

Each Obligor covenants that so long as any of the Notes are
outstanding:

9.1  Compliance with Law

Such Obligor shall and the Company shall cause each of its
Subsidiaries to comply with all laws, ordinances or
governmental rules or regulations to which each of them is
subject, including, without limitation, Environmental Laws,
and will obtain and maintain in effect all licenses,
certificates, permits, franchises and other governmental
authorizations necessary to the ownership of their
respective properties or to the conduct of their respective
businesses, in each case to the extent necessary to ensure
that non-compliance with such laws, ordinances or
governmental rules or regulations or failures to obtain or
maintain in effect such licenses, certificates, permits,
franchises and other governmental authorizations could not,
individually or in the aggregate, reasonably be expected to
have a Material Adverse Effect.

9.2  Insurance

Such Obligor shall and the Company shall cause each of its
Subsidiaries to maintain, with financially sound and
reputable insurers, insurance with respect to their
respective Properties and businesses against such casualties
and contingencies, of such types, on such terms and in such
amounts (including deductibles, co-insurance and self-
insurance, if adequate reserves are maintained with respect
thereto) as is customary in the case of entities of
established reputations engaged in the same or a similar
business and similarly situated.

9.3  Maintenance of Properties

Such Obligor shall and the Company shall cause each of its
Subsidiaries to maintain and keep, or cause to be maintained
and kept, their respective Properties in good repair,

                                                                 Page 22


working order and condition (other than ordinary wear and
tear), so that the business carried on in connection
therewith may be properly conducted at all times, provided
that this Section 9.3 shall not prevent such Obligor or any
Subsidiary of the Company from discontinuing the operation
and the maintenance of any of its Properties if such
discontinuance is desirable in the conduct of its business
and such Obligor has concluded that such discontinuance
could not, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect.

9.4  Payment of Taxes and Claims

Such Obligor shall and the Company shall cause each of its
Subsidiaries to file all tax returns required to be filed in
any jurisdiction and to pay and discharge all taxes shown to
be due and payable on such returns and all other taxes,
assessments, governmental charges, or levies imposed on them
or any of their properties, assets, income or franchises, to
the extent such taxes and assessments have become due and
payable and before they have become delinquent and all
claims for which sums have become due and payable that have
or might become a Lien on properties or assets of such
Obligor or any Subsidiary of the Company, provided that
neither such Obligor nor any Subsidiary of the Company need
pay any such tax or assessment or claims if (i) the amount,
applicability or validity thereof is contested by such
Obligor or such Subsidiary on a timely basis in good faith
and in appropriate proceedings, and such Obligor or such
Subsidiary has established adequate reserves therefor in
accordance with GAAP on the books of such Obligor or such
Subsidiary or (ii) the nonpayment of all such taxes and
assessments in the aggregate could not reasonably be
expected to have a Material Adverse Effect.

9.5  Corporate Existence, etc.

Such Obligor shall at all times preserve and keep in full
force and effect its corporate existence.  Subject to
Section 10.2, the Company shall at all times preserve and
keep in full force and effect the corporate existence of
each of its Subsidiaries (unless merged into such Obligor or
a Subsidiary) and all rights and franchises of the Company
and its Subsidiaries unless, in the good faith judgment of
the Company, the termination of or failure to preserve and
keep in full force and effect such corporate existence,
right or franchise could not, individually or in the
aggregate, have a Material Adverse Effect.

9.6  Corporate Separateness

The Guarantor shall at all times maintain its separate
existence and, specifically, shall conduct its affairs in
accordance with the following:

(a)  the Guarantor shall: (i) maintain and prepare separate
     financial reports and financial statements in accordance
     with GAAP, showing its assets and liabilities separate and
     apart from those of any other Person other than its
     Subsidiaries, and will not have its assets listed on the
     financial statement of any other Person (provided, that the
     Guarantor's assets may be included in a consolidated
     financial statement of a Person of which the Guarantor is a
     Subsidiary, if inclusion on such

                                                                 Page 23


     consolidated financial statement is required to comply with
     the requirements of GAAP; (ii) maintain its books, records and
     bank accounts separate from those of its Affiliates and any
     other Person other than its Subsidiaries; and (iii) not permit
     any Affiliate independent access to its bank accounts;

(b)  the Guarantor shall not commingle or pool any of its
     funds or other assets with those of any Affiliate or any
     other Person other than its Subsidiaries, and it shall hold
     all of its assets in its own name;

(c)  the Guarantor shall conduct its own business in its own
     name and shall not operate, or purport to operate,
     collectively as a single or consolidated business entity
     with respect to any Person other than its Subsidiaries;

(d)  the Guarantor shall, insofar as is consistent with
     commercial and business circumstances affecting its business
     and financial condition, remain solvent and pay its own
     debts, liabilities and expenses (including overhead
     expenses, if any) only out of its own assets as the same
     shall become due;

(e)  the Guarantor has done, or caused to be done, and shall
     do, all things necessary to observe all corporate
     formalities and other organizational formalities of the
     jurisdiction in which it is organized, and preserve its
     existence;

(f)  the Guarantor shall, to the extent it utilizes
     stationary, invoices and checks, maintain and utilize
     separate stationery, invoices and checks bearing its own
     name;

(g)  the Guarantor shall, at all times, hold itself out to
     the public as a legal entity separate and distinct from any
     other Person other than its Subsidiaries and shall correct
     any known misunderstanding regarding its separate identity;

(h)  the Guarantor shall not identify itself as a division
     of any other Person;

(i)  the Guarantor shall maintain its assets in such a
     manner that it will not be costly or difficult to segregate,
     ascertain or identify its individual assets from those of
     any Affiliate or any other Person other than its
     Subsidiaries;

(j)  the Guarantor shall not use its separate existence to
     abuse creditors or to perpetrate a fraud, injury, or
     injustice on creditors in violation of applicable law;

(k)  the Guarantor shall not, in connection with the
     Transaction Documents, act with an intent to hinder, delay,
     or defraud any of its creditors in violation of applicable
     law; and

(l)  the Guarantor shall not pledge its assets for the
     benefit of any Person, except as permitted by the Financing
     Documents.

                                                                 Page 24


10.  NEGATIVE COVENANTS

Each Obligor covenants that so long as any of the Notes are
outstanding:

10.1 Transactions with Affiliates

Such Obligor shall not and the Company shall not permit any
of its Subsidiaries to enter into directly or indirectly any
transaction or Material group of related transactions
(including without limitation the purchase, lease, sale or
exchange of Properties of any kind or the rendering of any
service) with any Affiliate (other than the Company or
another Subsidiary), except in the ordinary course and
pursuant to the reasonable requirements of the Company's or
such Subsidiary's business and upon fair and reasonable
terms no less favorable to such Obligor or such Subsidiary
than would be obtainable in a comparable arm's-length
transaction with a Person not an Affiliate; provided that
the foregoing shall not prohibit (i) shared corporate or
administrative services and staffing with Affiliates,
including without limitation accounting, legal, human
resources and treasury operations, provided on customary
terms for similarly situated companies and otherwise as set
forth above or on a fully allocated cost basis and
(ii) transactions conducted in a manner required by
applicable law, rule or regulation.

10.2 Merger, Consolidation, etc.

(a)  Such Obligor shall not consolidate with or merge with
     any other Person or convey, transfer or lease substantially
     all of its assets in a single transaction or series of
     transactions to any Person, and the Guarantor shall not sell
     or otherwise transfer any shares of the stock (or any
     options or warrants to purchase stock or other Securities
     exchangeable for or convertible into stock) of the Company
     to any Person unless:

        (i)   the successor formed by such consolidation or the
              survivor of such merger or the Person that acquires by
              conveyance, transfer or lease substantially all of the
              assets of such Obligor as an entirety or the transferee of
              such shares of stock, as the case may be, (any such Person,
              in relation to any such transaction involving the Company a
              Company Successor and any such Person, in relation to any
              such transaction involving the Guarantor a Guarantor
              Successor), shall have a credit rating in respect of its
              long-term debt from Standard & Poor's Ratings Service (a
              division of McGraw Hill Companies) of 'BBB' or higher or
              from Moody's Investor Services, Inc. of 'Baa2' or higher;

        (ii)  any Company Successor shall be primarily engaged in the
              utility business;

        (iii) any Company Successor or Guarantor Successor shall
              be a solvent corporation organized and existing under the
              laws of the United States or any State thereof (including
              the District of Columbia);

                                                                 Page 25


        (iv)  if any Company Successor or Guarantor Successor is not
              such Obligor, such Company Successor or Guarantor Successor,
              as the case may be, (i) shall have executed and delivered to
              each Noteholder its assumption of the due and punctual
              performance and observance of each covenant and condition of
              this Agreement, the Other Agreements and the Notes and (ii)
              shall have caused to be delivered to each Noteholder an
              opinion of nationally recognized independent counsel, or
              other independent counsel reasonably satisfactory to the
              Required Holders, to the effect that all agreements or
              instruments effecting such assumption are enforceable in
              accordance with their terms and comply with the terms
              hereof;

         v)   immediately after giving effect to such transaction, no
              Default or Event of Default shall have occurred and be
              continuing;

        (vi)  in the case of any Company Successor, immediately after
              giving effect to such transaction, such Company Successor
              would be permitted by the provisions of Section 10.5 hereof,
              as if such Section 10.5 applied to such Company Successor,
              to incur at least $1.00 of additional Indebtedness owing to
              a Person other than a Subsidiary of such Obligor; and

        (vii) in the case of any Guarantor Successor,
              immediately after giving effect to such transaction, the
              Consolidated Net Worth of such Guarantor Successor is an
              amount at least equal to the amount specified therefor in
              Section 10.6;

     provided; that this Section 10.2(a) shall not apply to
     the consolidation or merger of a Wholly-Owned
     Subsidiary of the Company into the Company.

(b)  No such conveyance, transfer or lease of substantially
     all of the assets of the Company shall have the effect of
     releasing the Company or any successor Person that shall
     theretofore have become such in the manner prescribed in
     this Section 10.2 from its liability under this Agreement or
     the Notes, or the Guarantor from its obligations hereunder
     or under the Guaranties, except that the Guarantor shall be
     released from its obligations hereunder and under the
     Guaranties if, in the case of any such transaction that is
     permitted by Section 10.2(a), the Company Successor or
     Guarantor Successor, as the case may be, shall have (i)
     executed and delivered to each Noteholder its assumption of
     the due and punctual performance and observance of the
     obligations of the Guarantor under this Agreement and under
     the Guaranties, and (ii) caused to be delivered to each
     Noteholder an opinion of nationally recognized independent
     counsel, or other independent counsel reasonably
     satisfactory to the Required Holders, to the effect that all
     agreements or instruments effecting such assumption are
     enforceable in accordance with their terms and comply with
     the terms hereof.

10.3 Liens

                                                                 Page 26


Such Obligor shall not, and the Company shall not permit any
of its Subsidiaries to, directly or indirectly create,
incur, assume or permit to exist (upon the happening of a
contingency or otherwise) any Lien (other than Permitted
Liens) securing Indebtedness for borrowed money on or with
respect to any Property or asset (including, without
limitation, any document or instrument in respect of goods
or accounts receivable) of such Obligor or any such
Subsidiary, whether now owned or held or hereafter acquired,
or any income or profits therefrom or assign or otherwise
convey any right to receive income or profits (unless it
makes, or causes to be made, effective provision whereby the
Notes will be equally and ratably secured with any and all
other Indebtedness thereby secured so long as such other
Indebtedness shall be so secured, such security to be
pursuant to an agreement reasonably satisfactory to the
Required Holders and, in any such case, the Notes shall have
the benefit, to the fullest extent that, and with such
priority as, the holders of the Notes may be entitled under
applicable law, of an equitable Lien on such Property).

10.4 Restricted Payments

The Company shall not at any time, declare or make, or incur
any liability to declare or make, any Restricted Payment
unless:

(a)  such Restricted Payment would not violate any provision
     of any statute or other rule or regulation of any
     Governmental Authority applicable to the Company;

(b)  immediately after giving effect to such action no
     Default or Event of Default would exist; and

(c)  immediately after giving effect to such action the
     Company and its Subsidiaries would be permitted by the
     provisions of Section 10.5 hereof to incur at least $1.00 of
     additional Indebtedness owing to a Person other than a
     Subsidiary of the Company.

10.5 Incurrence of Indebtedness

(a)  The Company shall not, and shall not permit any of its
     Subsidiaries to, directly or indirectly, create, incur,
     assume, guarantee, or otherwise become directly or
     indirectly liable with respect to, any Indebtedness, unless
     on the date the Company or such Subsidiary becomes liable
     with respect to any such Indebtedness and immediately after
     giving effect thereto and the concurrent retirement of any
     other Indebtedness:

        (i)   no Default or Event of Default exists;

        (ii)  (x) at any time from the date hereof until September
              30, 2004, the ratio of Consolidated Long Term Debt to
              Consolidated Total Capitalization does not exceed 0.67 to
              1.00, and (y) at any time on or after September 30,

                                                                 Page 27


              2004, the ratio of Consolidated Long Term Debt to
              Consolidated Total Capitalization does not exceed 0.65
              to 1.00; and

        (iii) the Interest Coverage Ratio for the period of four
              consecutive fiscal quarters ending on, or most recently
              ended prior to, such date (or, with respect to any
              Indebtedness for which the Company or such Subsidiary
              becomes liable on or before September 30, 2004, the period
              from the date hereof to such date) is not less than 2.50 to
              1.00;

     provided; nothing in this Section 10.5(a) shall prevent
     the Company or its Subsidiaries from creating,
     incurring, assuming, guaranteeing, or otherwise
     becoming directly or indirectly liable with respect to
     Current Debt and Permitted Reimbursement Obligations in
     an aggregate amount not to exceed $7,000,000 or such
     greater amount as would be permitted in accordance with
     clauses (ii) and (iii) of this Section 10.5(a); and

     provided; nothing in this Section 10.5(a) shall prevent
     any extension, renewal or refinancing of any
     Indebtedness of the Company or its Subsidiaries,
     provided that the principal amount of such Indebtedness
     outstanding immediately before giving effect to such
     extension, renewal or refunding is not increased and no
     Default or Event of Default exists at the time of such
     extension, renewal or refunding.

(b)  For the purposes of this Section 10.5:

        (i)   any Person becoming a Subsidiary after the date hereof
              shall be deemed, at the time it becomes a Subsidiary, to
              have incurred all of its then outstanding Indebtedness and
              pro forma effect shall be given to the earnings of such
              Person; and

        (ii)  upon the creation, incurrence or assumption of any
              Indebtedness, any other Indebtedness shall be deemed to be
              retired concurrently with such action if (A) such other
              Indebtedness is retired with the proceeds of such
              Indebtedness and (B) such other Indebtedness is retired
              within 60 days of such action.

10.6 Minimum Net Worth

(a)  The Guarantor shall not, at any time, permit its
     Consolidated Net Worth to be less than $50,000,000.

(b)  The Company shall not, at any time, permit its
     Consolidated Net Worth to be less than $43,000,000.

10.7 Anti-Terrorism Order

Such Obligor shall not, and shall not permit any of its
Subsidiaries to, enter into any legally binding contracts or
agreements with any Sanctioned Person.

                                                                 Page 28


11.  GUARANTY

11.1 The Guaranty

The Guarantor hereby guarantees to each Purchaser and their
respective successors and assigns the prompt payment in full
when expressed to be due (whether at stated maturity, upon
acceleration or optional prepayment or otherwise) of the
principal of and interest on any Notes at any time and from
time to time outstanding and all other amounts from time to
time owing by the Company hereunder (including interest on
any past-due principal, interest or any other amount), in
each case strictly in accordance with the express terms
hereof (such obligations of the Company being herein
collectively called the GasCo Guaranteed Obligations).

In addition, the Guarantor hereby further agrees, as an
independent obligation, that, if the Company fails to pay in
full when expressed to be due (whether at stated maturity,
upon acceleration or optional prepayment or otherwise) any
of the GasCo Guaranteed Obligations strictly in accordance
with the express terms hereof, the Guarantor will promptly
pay the same, without any demand or notice whatsoever, and
that in the case of any extension of time of payment or
renewal of any of the GasCo Guaranteed Obligations, the same
will be paid in full when expressed to be due (whether at
stated maturity, upon acceleration or optional prepayment or
otherwise) in accordance with the terms of such extension or
renewal.

11.2 Obligations Unconditional

The obligations of the Guarantor under Section 11.1 are
absolute and unconditional, irrespective of the value,
genuineness, validity, regularity or enforceability of the
obligations of the Company hereunder or under any other
agreement or instrument referred to herein and, to the
fullest extent permitted by applicable law, irrespective of
any other circumstance whatsoever that might otherwise
constitute a legal or equitable discharge or defense of a
surety or guarantor, it being the intent of this Section
11.2 that the obligations of the Guarantor hereunder shall
be absolute and unconditional under any and all
circumstances.  Without limiting the generality of the
foregoing, the occurrence of one or more of the following
shall not preclude the exercise by the Purchasers of any
right, remedy or power hereunder or alter or impair the
liability of the Guarantor hereunder, which shall remain
absolute and unconditional as described above:

(a)  at any time or from time to time, without notice to the
     Guarantor, the time for any performance of or compliance
     with any of the GasCo Guaranteed Obligations shall be
     extended, waived or renewed, or the Company shall be
     released from any of the GasCo Guaranteed Obligations, or
     any of the GasCo Guaranteed Obligations shall be
     subordinated in right of payment to any other liability of
     the Company;

                                                                 Page 29


(b)  any of the acts mentioned herein or any agreement or
     instrument referred to herein or otherwise in connection
     with the GasCo Guaranteed Obligations shall be done or
     omitted;

(c)  any of the GasCo Guaranteed Obligations shall be
     accelerated or otherwise become due prior to their stated
     maturity, or any of the GasCo Guaranteed Obligations shall
     be amended, supplemented, restated or otherwise modified in
     any respect, or any right hereunder or under any agreement
     or instrument referred to herein or otherwise in connection
     with the GasCo Guaranteed Obligations shall be waived, or
     any other guarantee of any of the GasCo Guaranteed
     Obligations or any security therefor shall be released,
     substituted or exchanged in whole or in part or otherwise
     dealt with;

(d)  the Company or any other guarantor or obligor in
     respect of any of the GasCo Guaranteed Obligations (i)
     becomes insolvent or is unable to pay its debts or fails or
     admits in writing its inability generally to pay its debts
     as they become due, (ii) makes a general assignment,
     arrangement or composition with or for the benefit of its
     creditors, (iii) institutes or has instituted against it a
     proceeding seeking a judgment of insolvency or bankruptcy or
     any other relief under any bankruptcy or insolvency law or
     other similar law affecting creditors' rights, or a petition
     is presented for its winding-up or liquidation, (iv) seeks
     or becomes subject to the appointment of an administrator,
     provisional liquidator, conservator, receiver, trustee,
     custodian or other similar official for it or for all or
     substantially all its assets, (v) has a secured party take
     possession of all or substantially all its assets or has a
     distress, execution, attachment, sequestration or other
     legal process levied, enforced or sued on or against all or
     substantially all its assets or (vi) causes or is subject to
     any event with respect to it which, under the applicable
     laws of any jurisdiction, has an analogous effect to any of
     the events specified in clauses (i), (ii), (iii), (iv) or
     (v) above (any proceeding referred to in this paragraph is
     herein referred to as an Insolvency Proceeding);

(e)  this Agreement or any agreement or instrument referred
     to herein shall be rejected (including pursuant to Section
     365 of the United States Bankruptcy Code, as amended) by an
     administrator, provisional liquidator, conservator,
     receiver, trustee, custodian or other similar official for
     the Company or for all or substantially all of the Company's
     assets in any Insolvency Proceeding;

(f)  the occurrence of any Default or Event of Default
     hereunder or the occurrence of any similar event (howsoever
     described) under any agreement or instrument referred to
     herein;

(g)  except as otherwise provided in Section 10.2(b), any
     consolidation or amalgamation of the Company with, any
     merger of the Company with or into, or any transfer by the
     Company of all or substantially all of the Company's assets
     to, another Person, any change in the legal or beneficial
     ownership of ownership

                                                                 Page 30


     interests issued by the Company, or any other change whatsoever
     in the objects, capital structure, constitution or business of
     the Company;

(h)  any delay, failure or inability of the Company or any
     other guarantor or obligor in respect of any of the GasCo
     Guaranteed Obligations to perform, willful or otherwise, any
     provision hereunder or any agreement or instrument referred
     to herein or otherwise in connection with the GasCo
     Guaranteed Obligations;

(i)  the failure or breach of any representation or warranty
     (whether written or oral) made by the Company or any other
     Person herein or any agreement or instrument referred to
     herein or otherwise in connection with the GasCo Guaranteed
     Obligations; or any event or circumstance constituting fraud
     in the inducement or any other similar event or
     circumstance;

(j)  any action or failure to act by any Purchaser that
     adversely affects the Guarantor's right of subrogation
     arising by reason of any performance by the Guarantor of its
     obligations under this Section 11;

(k)  any suit or other action brought by, or any judgment in
     favor of, any beneficiaries or creditors of, the Company or
     any other Person for any reason whatsoever, including any
     suit or action in any way disaffirming, repudiating,
     rejecting or otherwise calling into question any issue,
     matter or thing in respect of this Agreement or any
     agreement or instrument referred to herein or otherwise in
     connection with the GasCo Guaranteed Obligations;

(l)  any lack or limitation of status or of power,
     incapacity or disability of the Company or any other
     guarantor or obligor in respect of any of the GasCo
     Guaranteed Obligations; or

(m)  any change in the laws, rules or regulations of any
     jurisdiction, or any present or future action or order of
     any Governmental Authority, amending, varying or otherwise
     affecting the validity or enforceability of any of the GasCo
     Guaranteed Obligations or the obligations of any other
     guarantor or obligor in respect of any of the GasCo
     Guaranteed Obligations.

The Guarantor hereby expressly waives diligence,
presentment, demand of payment, protest and all notices
whatsoever, and any requirement that the Purchasers exhaust
any right, power or remedy (including filing any proof of
claim relating to the GasCo Guaranteed Obligations in any
Insolvency Proceeding) or proceed against the Company under
this Agreement or any agreement or instrument referred to
herein, or against any other Person under any other
guarantee of, or security for, any of the GasCo Guaranteed
Obligations, it being understood that this Section 11 is a
guarantee of payment and not just collection.

11.3 Subrogation

                                                                 Page 31


The Guarantor hereby agrees that until the payment and
satisfaction in full of all GasCo Guaranteed Obligations it
shall not exercise any right or remedy (including the filing
of any proof of claim in any Insolvency Proceeding) against
the Company or any other guarantor or obligor in respect of
any of the GasCo Guaranteed Obligations or any security
therefor arising by reason of any performance by the
Guarantor of its obligations under this Section 11, whether
by subrogation or otherwise. In the event that, prior to the
payment and satisfaction in full of all GasCo Guaranteed
Obligations, any amount is received by the Guarantor from
the Company in respect of the performance by the Guarantor
of its obligations under Section 11.1, whether by
subrogation or otherwise, the Guarantor will promptly
following receipt thereof pay such amount to the Noteholders
(to each Noteholder in proportion, as nearly as practicable,
to the unpaid principal amount of Notes held by such
Noteholder), for application to any GasCo Guaranteed
Obligations then owing, whether matured or unmatured.

11.4 Reinstatement

The obligations of the Guarantor under this Section 11 shall
be automatically reinstated if and to the fullest extent
that for any reason any payment by or on behalf of the
Company in respect of the GasCo Guaranteed Obligations is
rescinded or must be otherwise restored by any holder of any
of the GasCo Guaranteed Obligations, whether as a result of
any Insolvency Proceeding or otherwise, all as though such
payment had not been made, and the Guarantor agrees that it
will indemnify each Noteholder on demand for all reasonable
costs and expenses (including the reasonable fees and
disbursements of counsel) incurred by such Purchaser in
connection with such rescission or restoration, including
any such costs and expenses incurred in defending against
any claim alleging that such payment constituted a
preference, fraudulent transfer or similar payment under any
bankruptcy, insolvency or similar law.

11.5 Remedies Unaffected

The Guarantor agrees that, as between the Guarantor and the
Purchasers the GasCo Guaranteed Obligations may be declared
to be forthwith due and payable as provided herein (and
shall be deemed to have become automatically due and payable
in the circumstances provided in Section 13.1(a)) for
purposes of Section 11.1, notwithstanding any stay
(including under the United States Bankruptcy Code, as
amended), injunction or other prohibition preventing the
same as against the Company, and that, in such event, the
GasCo Guaranteed Obligations (whether or not due and payable
by the Company) shall forthwith become due and payable by
the Guarantor for purposes of Section 11.1.

11.6 Continuing Guarantee; Liability in Respect of Successor

(a)  The guarantee in this Section 11 is a continuing
     guarantee, and shall apply to all GasCo Guaranteed
     Obligations whenever arising.

(b)  In the event that the Company shall consolidate or
     amalgamate with, or merge with or into, or transfer all or
     substantially all its assets to, another Person, except

                                                                 Page 32


     as otherwise provided in Section 10.2(b), the Guarantor will
     continue to be obligated hereunder in respect of the GasCo
     Guaranteed Obligations, whether or not the GasCo Guaranteed
     Obligations are assumed by such Person, and each reference
     herein to the Company shall thereafter instead be a
     reference to such Person.

12.  EVENTS OF DEFAULT

An "Event of Default" shall exist if any of the following
conditions or events shall occur and be continuing:

(a)  the Company defaults in the payment of any principal or
     Make-Whole Amount or Modified Make-Whole Amount, if any, on
     any Note when the same becomes due and payable, whether at
     maturity or at a date fixed for prepayment or by declaration
     or otherwise; or

(b)  the Company defaults in the payment of any interest on
     any Note for more than five Business Days after the same
     becomes due and payable; or

(c)  any Obligor defaults in the performance of or
     compliance with any term contained in Sections 7.1(d), 8.4,
     9.5, or 10.1 through 10.7 (inclusive); or

(d)  any Obligor defaults in the performance of or
     compliance with any term contained herein (other than those
     referred to in paragraphs (a), (b) and (c) of this Section
     12) and such default is not remedied within 30 days after
     the earlier of (i) a Responsible Officer of such Obligor
     obtaining actual knowledge of such default and (ii) such
     Obligor receiving written notice of such default from any
     Noteholder (any such written notice to be identified as a
     "notice of default" and to refer specifically to this
     paragraph (d) of Section 12); or

(e)  any representation or warranty made in writing by or on
     behalf of Citizens or any Affiliate of Citizens or by any
     officer of Citizens or such Affiliate in the GasCo Purchase
     Agreement or in any writing furnished in connection with the
     transactions contemplated thereby proves to have been false
     or incorrect in any material respect on the date as of which
     made provided that such representation or warranty pertains
     to an event or condition that could reasonably be expected
     to cause or constitute a Material Adverse Effect; or

(f)  any representation or warranty made in writing by or on
     behalf of any Obligor or by any officer of any Obligor in
     this Agreement or in any writing furnished in connection
     with the transactions contemplated hereby proves to have
     been false or incorrect in any material respect on the date
     as of which made; or

(g)  (i) any Subsidiary of the Guarantor is in default (as
     principal or as guarantor or other surety) in the payment of
     any principal of or premium or make-whole amount or interest
     on any Indebtedness that is outstanding in an aggregate

                                                                 Page 33


     principal amount of at least $4,000,000 beyond any period of
     grace provided with respect thereto, or (ii) any such
     Subsidiary is in default in the performance of or compliance
     with any term of any evidence of any Indebtedness in an
     aggregate outstanding principal amount of at least
     $4,000,000 or of any mortgage, indenture or other agreement
     relating thereto or any other condition exists, and as a
     consequence of such default or condition such Indebtedness
     has become, or has been declared, due and payable before its
     stated maturity or before its regularly scheduled dates of
     payment, or (iii) as a consequence of the occurrence or
     continuation of any event or condition (other than the
     passage of time or the right of the holder of Indebtedness
     to convert such Indebtedness into equity interests), such
     Subsidiary has become obligated to purchase or repay
     Indebtedness before its regular maturity or before its
     regularly scheduled dates of payment in an aggregate
     outstanding principal amount of at least $4,000,000; or

(h)  (i) any Obligor is in default (as principal or as
     guarantor or other surety) in the payment of any principal
     of or premium or make-whole amount or interest on any
     Indebtedness that is outstanding in an aggregate principal
     amount of at least $4,000,000 beyond any period of grace
     provided with respect thereto, or (ii) any Obligor is in
     default in the performance of or compliance with any term of
     any evidence of any Indebtedness in an aggregate outstanding
     principal amount of at least $4,000,000 or of any mortgage,
     indenture or other agreement relating thereto or any other
     condition exists, and as a consequence of such default or
     condition such Indebtedness has become, or has been declared
     (or one or more Persons are entitled to declare such
     Indebtedness to be), due and payable before its stated
     maturity or before its regularly scheduled dates of payment,
     or (iii) as a consequence of the occurrence or continuation
     of any event or condition (other than the passage of time or
     the right of the holder of Indebtedness to convert such
     Indebtedness into equity interests), (x) any Obligor has
     become obligated to purchase or repay Indebtedness before
     its regular maturity or before its regularly scheduled dates
     of payment in an aggregate outstanding principal amount of
     at least $4,000,000, or (y) one or more Persons have the
     right to require any Obligor so to purchase or repay such
     Indebtedness;  or

(i)  any Obligor or any Subsidiary (i) is generally not
     paying, or admits in writing its inability to pay, its debts
     as they become due, (ii) files, or consents by answer or
     otherwise to the filing against it of, a petition for relief
     or reorganization or arrangement or any other petition in
     bankruptcy, for liquidation or to take advantage of any
     bankruptcy, insolvency, reorganization, moratorium or other
     similar law of any jurisdiction, (iii) makes an assignment
     for the benefit of its creditors, (iv) consents to the
     appointment of a custodian, receiver, trustee or other
     officer with similar powers with respect to it or with
     respect to any substantial part of its Property, (v) is
     adjudicated as insolvent or to be liquidated, or (vi) takes
     corporate action for the purpose of any of the foregoing; or

(j)  a court or governmental authority of competent
     jurisdiction enters an order appointing, without consent by
     any Obligor or any Subsidiary, a custodian,

                                                                 Page 34


     receiver, trustee or other officer with similar powers with
     respect to any Obligor or any Subsidiary or with respect to
     any substantial part of any of their Property, or constituting
     an order for relief or approving a petition for relief or
     reorganization or any other petition in bankruptcy or for
     liquidation or to take advantage of any bankruptcy or
     insolvency law of any jurisdiction, or ordering the
     dissolution, winding-up or liquidation of any Obligor or any
     Subsidiary, or any such petition shall be filed against any
     Obligor or any Subsidiary and such petition shall not be
     dismissed within 60 days; or

(k)  a final judgment or judgments for the payment of money
     aggregating in excess of $4,000,000 are rendered against the
     Company or any of its Subsidiaries and which judgments are
     not, within 60 days after entry thereof, bonded, discharged
     or stayed pending appeal, or are not discharged within 60
     days after the expiration of such stay; or

(l)  if (i) any Plan shall fail to satisfy the minimum
     funding standards of ERISA or the Code for any plan year or
     part thereof or a waiver of such standards or extension of
     any amortization period is sought or granted under section
     412 of the Code, (ii) the PBGC shall have instituted
     proceedings under ERISA section 4042 to terminate or appoint
     a trustee to administer any Plan or the PBGC shall have
     notified any Obligor or any ERISA Affiliate that a Plan may
     become a subject of any such proceedings, (iii) the
     aggregate "amount of unfunded benefit liabilities" (within
     the meaning of section 4001(a)(18) of ERISA) under all
     Plans, determined on a termination basis as of the end of
     any Plan year in accordance with Title IV of ERISA, shall
     exceed $30,000,000, (iv) any Obligor or any ERISA Affiliate
     shall have incurred or is reasonably expected to incur any
     liability pursuant to Title I or IV of ERISA (other than
     claims for benefits in the ordinary course or PBGC premiums
     required under Title IV of ERISA) or the penalty or excise
     tax provisions of the Code relating to employee benefit
     plans, (v) any Obligor or any ERISA Affiliate withdraws from
     any Multiemployer Plan, or (vi) any Obligor or any
     Subsidiary establishes or amends any employee welfare
     benefit plan that provides post-employment welfare benefits
     (other than Plans established at the time of the Acquisition
     to cover retirees or former employees of Citizens as
     required by the GasCo Purchase Agreement) in a manner that
     would increase the liability of such Obligor or Subsidiary
     thereunder; and any such event or events described in
     clauses (i) through (vi) above, either individually or
     together with any other such event or events, would
     reasonably be expected to have a Material Adverse Effect.
     As used in this Section 12(l), the terms "employee benefit
     plan" and "employee welfare benefit plan" shall have the
     respective meanings assigned to such terms in Section 3 of
     ERISA; or

(m)  the Guarantor shall fail to observe or perform any of
     its obligations contained in Section 11 or shall renounce in
     writing its obligations with respect thereto.

                                                                 Page 35


13.  REMEDIES ON DEFAULT, ETC.

13.1 Acceleration

(a)  If an Event of Default with respect to any Obligor
     described in Section 12(i) or 12(j) (other than an Event of
     Default described in clause (i) of Section 12(i) or
     described in clause (vi) of Section 12(i) by virtue of the
     fact that such clause encompasses clause (i) of Section
     12(i)) has occurred, all the Notes then outstanding shall
     automatically become immediately due and payable.

(b)  If any other Event of Default has occurred and is
     continuing, the Required Holders may at any time at its or
     their option, by notice or notices to the Company, declare
     all the Notes then outstanding to be immediately due and
     payable.

(c)  If any Event of Default described in Section 12(a) or
     12(b) has occurred and is continuing, any holder or holders
     of Notes at the time outstanding affected by such Event of
     Default may at any time, at its or their option, by notice
     or notices to the Company, declare all the Notes held by it
     or them to be immediately due and payable.

Upon any Notes becoming due and payable under this Section
13.1, whether automatically or by declaration, such Notes
will forthwith mature and the entire unpaid principal amount
of such Notes, plus (x) all accrued and unpaid interest
thereon and (y) the Make-Whole Amount determined in respect
of such principal amount (to the full extent permitted by
applicable law), shall all be immediately due and payable,
in each and every case without presentment, demand, protest
or further notice, all of which are hereby waived.  The
Company acknowledges, and the parties hereto agree, that
each Noteholder has the right to maintain its investment in
the Notes free from repayment by the Company (except as
herein specifically provided for) and that the provision for
payment of a Make-Whole Amount by the Company in the event
that the Notes are prepaid or are accelerated as a result of
an Event of Default, is intended to provide compensation for
the deprivation of such right under such circumstances.

13.2 Other Remedies

If any Default or Event of Default has occurred and is
continuing, and irrespective of whether any Notes have
become or have been declared immediately due and payable
under Section 13.1, the holder of any Note at the time
outstanding may proceed to protect and enforce the rights of
such holder by an action at law, suit in equity or other
appropriate proceeding, whether for the specific performance
of any agreement contained herein or in any Note, or for an
injunction against a violation of any of the terms hereof or
thereof, or in aid of the exercise of any power granted
hereby or thereby or by law or otherwise.

13.3 Rescission

                                                                 Page 36


At any time after any Notes have been declared due and
payable pursuant to clause (b) or (c) of Section 13.1, the
Required Holders, by written notice to the Company, may
rescind and annul any such declaration and its consequences
if (a) the Company has paid all overdue interest on the
Notes, all principal of and Make-Whole Amount or Modified
Make-Whole Amount, if any, on any Notes that are due and
payable and are unpaid other than by reason of such
declaration, and all interest on such overdue principal and
Make-Whole Amount or Modified Make-Whole Amount, if any, and
(to the extent permitted by applicable law) any overdue
interest in respect of the Notes, at the Default Rate, (b)
all Events of Default and Defaults, other than non-payment
of amounts that have become due solely by reason of such
declaration, have been cured or have been waived pursuant to
Section 18, and (c) no judgment or decree has been entered
for the payment of any monies due pursuant hereto or to the
Notes.  No rescission and annulment under this Section 13.3
will extend to or affect any subsequent Event of Default or
Default or impair any right consequent thereon.

13.4 No Waivers or Election of Remedies, Expenses, etc.

No course of dealing and no delay on the part of any
Noteholder in exercising any right, power or remedy shall
operate as a waiver thereof or otherwise prejudice such
Noteholder's rights, powers or remedies.  No right, power or
remedy conferred by this Agreement or by any Note upon any
holder thereof shall be exclusive of any other right, power
or remedy referred to herein or therein or now or hereafter
available at law, in equity, by statute or otherwise.
Without limiting the obligations of the Company under
Section 16, the Company will pay to the each Noteholder on
demand such further amount as shall be sufficient to cover
all costs and expenses of such Noteholder incurred in any
enforcement or collection under this Section 13, including,
without limitation, reasonable attorneys' fees, expenses and
disbursements.

14.  REGISTRATION; EXCHANGE; SUBSTITUTION OF NOTES

14.1 Registration of Notes

The Company shall keep at its principal executive office a
register for the registration and registration of transfers
of Notes.  The name and address of each Noteholder, each
transfer thereof and the name and address of each transferee
of one or more Notes shall be registered in such register.
Prior to due presentment for registration of transfer, the
Person in whose name any Note shall be registered shall be
deemed and treated as the owner and holder thereof for all
purposes hereof, and the Company shall not be affected by
any notice or knowledge to the contrary.  The Company shall
give to any holder of a Note that is an Institutional
Investor promptly upon request therefor, a complete and
correct copy of the names and addresses of all registered
Noteholders.

14.2 Transfer and Exchange of Notes

Upon surrender of any Note at the principal executive office
of the Company for registration of transfer or exchange (and
in the case of a surrender for registration of

                                                                 Page 37


transfer, duly endorsed or accompanied by a written instrument
of transfer duly executed by the registered holder of such Note
or his attorney duly authorized in writing and accompanied
by the address for notices of each transferee of such Note
or part thereof), the Company shall execute and deliver, at
the Company's expense (except as provided below), one or
more new Notes (as requested by the holder thereof) of the
same Series in exchange therefor, in an aggregate principal
amount equal to the unpaid principal amount of the
surrendered Note.  Each such new Note shall be payable to
such Person as such holder may request and shall be
substantially in the form of Exhibit 1-A or Exhibit 1-B, as
applicable.  Each such new Note shall be dated and bear
interest from the date to which interest shall have been
paid on the surrendered Note or dated the date of the
surrendered Note if no interest shall have been paid
thereon.  The Company may require payment of a sum
sufficient to cover any stamp tax or governmental charge
imposed in respect of any such transfer of Notes.  Notes
shall not be transferred in denominations of less than
$100,000, provided that if necessary to enable the
registration of transfer by a holder of its entire holding
of Notes, one Note may be in a denomination of less than
$100,000.  Any transferee, by its acceptance of a Note
registered in its name (or the name of its nominee), shall
be deemed to have made the representation set forth in
Section 6.2.

14.3 Replacement of Notes

Upon receipt by the Company of evidence reasonably
satisfactory to it of the ownership of and the loss, theft,
destruction or mutilation of any Note (which evidence shall
be, in the case of an Institutional Investor, notice from
such Institutional Investor of such ownership and such loss,
theft, destruction or mutilation), and

(a)  in the case of loss, theft or destruction, of indemnity
     reasonably satisfactory to it (provided that if the holder
     of such Note is, or is a nominee for, an original Purchaser
     or another holder of a Note that is an Institutional
     Investor, such Person's own unsecured agreement of indemnity
     shall be deemed to be satisfactory), or

(b)  in the case of mutilation, upon surrender and
     cancellation thereof,

the Company at its own expense shall execute and deliver, in
lieu thereof, a new Note of the same Series, dated and
bearing interest from the date to which interest shall have
been paid on such lost, stolen, destroyed or mutilated Note
or dated the date of such lost, stolen, destroyed or
mutilated Note if no interest shall have been paid thereon.

15.  PAYMENTS ON NOTES

15.1 Place of Payment

Subject to Section 15.2, payments of principal, Make-Whole
Amount and Modified Make-Whole Amount, if any, and interest
becoming due and payable on the Notes shall be made in New
York, New York at the principal office of Wells Fargo Bank
in such jurisdiction.  The Company may at any time, by
notice to each Noteholder, change the

                                                                 Page 38


place of payment of the Notes so long as such place of payment
shall be either the principal office of the Company in such
jurisdiction or the principal office of a bank or trust company
in such jurisdiction.

15.2 Home Office Payment

So long as you or your nominee shall be the holder of any
Note, and notwithstanding anything contained in Section 15.1
or in such Note to the contrary, the Company will pay all
sums becoming due on such Note for principal, Make-Whole
Amount or Modified Make-Whole Amount, if any, and interest
by the method and at the address specified for such purpose
below your name in Schedule A, or by such other method or at
such other address as you shall have from time to time
specified to the Company in writing for such purpose,
without the presentation or surrender of such Note or the
making of any notation thereon, except that upon written
request of the Company made concurrently with or reasonably
promptly after payment or prepayment in full of any Note,
you shall surrender such Note for cancellation, reasonably
promptly after any such request, to the Company at its
principal executive office or at the place of payment most
recently designated by the Company pursuant to Section 15.1.
Prior to any sale or other disposition of any Note held by
you or your nominee you will, at your election, either
endorse thereon the amount of principal paid thereon and the
last date to which interest has been paid thereon or
surrender such Note to the Company in exchange for a new
Note or Notes pursuant to Section 14.2.  The Company will
afford the benefits of this Section 15.2 to any
Institutional Investor that is the direct or indirect
transferee of any Note purchased by you under this Agreement
and that has made the same agreement relating to such Note
as you have made in this Section 15.2.

16.  EXPENSES, ETC

16.1 Transaction Expenses

Whether or not the transactions contemplated hereby are
consummated, the Company will pay all costs and expenses
(including reasonable attorneys' fees of a special counsel
and, if reasonably required, local, regulatory or other
counsel) incurred by you and each Other Purchaser or
Noteholder in connection with such transactions and in
connection with any amendments, waivers or consents under or
in respect of this Agreement or the Notes (whether or not
such amendment, waiver or consent becomes effective),
including, without limitation: (a) the costs and expenses
incurred in enforcing or defending (or determining whether
or how to enforce or defend) any rights under this Agreement
or the Notes or in responding to any subpoena or other legal
process or informal investigative demand issued in
connection with this Agreement or the Notes, or by reason of
being a Noteholder, and (b) the costs and expenses,
including financial advisors' fees, incurred in connection
with the insolvency or bankruptcy of any Obligor or any
Subsidiary or in connection with any work-out or
restructuring of the transactions contemplated hereby and by
the Notes.  The Company will pay, and will save you and each
other Noteholder harmless from, all claims in respect of any
fees, costs or expenses if any, of brokers and finders
(other than those retained by you).

                                                                 Page 39


16.2 Survival

The obligations of the Company under this Section 16 will
survive the payment or transfer of any Note, the
enforcement, amendment or waiver of any provision of this
Agreement or the Notes, and the termination of this
Agreement.

17.   SURVIVAL  OF  REPRESENTATIONS AND  WARRANTIES;  ENTIRE
AGREEMENT

All representations and warranties contained herein shall
survive the execution and delivery of this Agreement and the
Notes, the purchase or transfer by you of any Note or
portion thereof or interest therein and the payment of any
Note, and may be relied upon by any subsequent Noteholder,
regardless of any investigation made at any time by or on
behalf of you or any other Noteholder.  All statements
contained in any certificate or other instrument delivered
by or on behalf of any Obligor pursuant to this Agreement
shall be deemed representations and warranties of such
Obligor under this Agreement.  Subject to the preceding
sentence, this Agreement and the Notes embody the entire
agreement and understanding between you and the Obligors and
supersede all prior agreements and understandings relating
to the subject matter hereof.

18.  AMENDMENT AND WAIVER

18.1 Requirements

This Agreement and the Notes may be amended, and the
observance of any term hereof or of the Notes may be waived
(either retroactively or prospectively), with (and only
with) the written consent of the Obligors and the Required
Holders, except that (a) no amendment or waiver of any of
the provisions of Section 1, 2, 3, 4, 5, 6 or 22 hereof, or
any defined term (as it is used therein), will be effective
as to you unless consented to by you in writing, and (b) no
such amendment or waiver may, without the written consent of
each Noteholder affected thereby, (i) subject to the
provisions of Section 13 relating to acceleration or
rescission, change the amount or time of any prepayment or
payment of principal of, or reduce the rate or change the
time of payment or method of computation of interest or of
the Make-Whole Amount or Modified Make-Whole Amount on, the
Notes, (ii) change the percentage of the principal amount of
the Notes the holders of which are required to consent to
any such amendment or waiver, or (iii) amend any of Sections
8, 12(a), 12(b), 13, 18 or 21.

18.2 Solicitation of Holders of Notes

(a)  Solicitation.  The Company will provide each Noteholder
     (irrespective of the amount of Notes then owned by it) with
     sufficient information, sufficiently far in advance of the
     date a decision is required, to enable such Noteholder to
     make an informed and considered decision with respect to any
     proposed amendment, waiver or consent in respect of any of
     the provisions hereof or of the Notes.  The Company will
     deliver executed or true and correct copies of each
     amendment,

                                                                 Page 40


     waiver or consent effected pursuant to the provisions of this
     Section 18 to each Noteholder promptly following the date on
     which it is executed and delivered by, or receives the consent
     or approval of, the requisite holders of Notes.

(b)  Payment.  No Obligor will directly or indirectly pay or
     cause to be paid any remuneration, whether by way of
     supplemental or additional interest, fee or otherwise, or
     grant any security, to any Noteholder as consideration for
     or as an inducement to the entering into by any Noteholder
     or any waiver or amendment of any of the terms and
     provisions hereof unless such remuneration is concurrently
     paid, or security is concurrently granted, on the same
     terms, ratably to each Noteholder even if such Noteholder
     did not consent to such waiver or amendment.

18.3 Binding Effect, etc.

Any amendment or waiver consented to as provided in this
Section 18 applies equally to all Noteholders and is binding
upon them and upon each future Noteholder and upon the
Company without regard to whether any Note has been marked
to indicate such amendment or waiver.  No such amendment or
waiver will extend to or affect any obligation, covenant,
agreement, Default or Event of Default not expressly amended
or waived or impair any right consequent thereon.  No course
of dealing between the Company and any Noteholder nor any
delay in exercising any rights hereunder or under any Note
shall operate as a waiver of any rights of any holder of
such Note.  As used herein, the term "this Agreement" and
references thereto shall mean this Agreement as it may from
time to time be amended or supplemented.

18.4 Notes held by Company, etc.

Solely for the purpose of determining whether the holders of
the requisite percentage of the aggregate principal amount
of Notes then outstanding approved or consented to any
amendment, waiver or consent to be given under this
Agreement or the Notes, or have directed the taking of any
action provided herein or in the Notes to be taken upon the
direction of the holders of a specified percentage of the
aggregate principal amount of Notes then outstanding, Notes
directly or indirectly owned by the Company or any of its
Affiliates shall be deemed not to be outstanding.

19.  NOTICES

All notices and communications provided for hereunder shall
be in writing and sent (a) by telecopy if the sender on the
same day sends a confirming copy of such notice by a
recognized overnight delivery service (charges prepaid), or
(b) by registered or certified mail with return receipt
requested (postage prepaid), or (c) by a recognized
overnight delivery service (with charges prepaid).  Any such
notice must be sent:

        (i)   if to you or your nominee, to you or it at the address
              specified for such communications in Schedule A , or at such
              other address as you or it shall have specified to the
              Company in writing,

                                                                 Page 41


        (ii)  if to any other Noteholder, to such Noteholder at such
              address as such other Noteholder shall have specified to the
              Company in writing,

        (iii) if to the Company, to the Company at its address
              set forth at the beginning hereof to the attention of the
              Chief Financial Officer, or at such other address as the
              Company shall have specified to each Noteholder in writing,
              or

        (iv)  if to the Guarantor, to the Guarantor at UniSource
              Energy Services, Inc., One South Church Avenue, Suite 200,
              Tucson, Arizona 85701 to the attention of the Chief
              Financial Officer, or at such other address as the Guarantor
              shall have specified to each Noteholder in writing.

Notices under this Section 19 will be deemed given only when
actually received.

20.  REPRODUCTION OF DOCUMENTS

This Agreement and all documents relating thereto,
including, without limitation, (a) consents, waivers and
modifications that may hereafter be executed, (b) documents
received by you at the Closing (except the Notes
themselves), and (c) financial statements, certificates and
other information previously or hereafter furnished to you,
may be reproduced by you by any photographic, photostatic,
microfilm, microcard, miniature photographic or other
similar process and you may destroy any original document so
reproduced.  The Obligors agree and stipulate that, to the
extent permitted by applicable law, any such reproduction
shall be admissible in evidence as the original itself in
any judicial or administrative proceeding (whether or not
the original is in existence and whether or not such
reproduction was made by you in the regular course of
business) and any enlargement, facsimile or further
reproduction of such reproduction shall likewise be
admissible in evidence.  This Section 20 shall not prohibit
any Obligor or any Noteholder from contesting any such
reproduction to the same extent that it could contest the
original, or from introducing evidence to demonstrate the
inaccuracy of any such reproduction.

21.  CONFIDENTIAL INFORMATION

For the purposes of this Section 21, Confidential
Information means information delivered to you by or on
behalf of any Obligor or any Subsidiary in connection with
the transactions contemplated by or otherwise pursuant to
this Agreement that is proprietary in nature and that was
clearly marked or labeled or otherwise adequately identified
when received by you as being confidential information of
such Obligor or such Subsidiary, provided that such term
does not include information that (a) was publicly known or
otherwise known to you prior to the time of such disclosure,
(b) subsequently becomes publicly known through no act or
omission by you or any person acting on your behalf, (c)
otherwise becomes known to you other than through disclosure
by any Obligor or any Subsidiary or (d) constitutes
financial statements delivered to you under Section 7.1 that
are otherwise publicly available.  You will maintain the
confidentiality of such

                                                                 Page 42


Confidential Information in accordance with procedures adopted
by you in good faith to protect confidential information of
third parties delivered to you,  provided that you may deliver
or disclose Confidential Information to (i) your directors,
officers, employees, agents, attorneys and affiliates (to the
extent such disclosure reasonably relates to the administration
of the investment represented by your Notes), (ii) your
financial advisors and other professional advisors who agree
to hold confidential the Confidential Information
substantially in accordance with the terms of this Section
21, (iii) any other Noteholder, (iv) any Institutional
Investor to which you sell or offer to sell such Note or any
part thereof or any participation therein (if such Person
has agreed in writing prior to its receipt of such
Confidential Information to be bound by the provisions of
this Section 21), (v) any Person from which you offer to
purchase any security of the Company (if such Person has
agreed in writing prior to its receipt of such Confidential
Information to be bound by the provisions of this Section
21), (vi) any federal or state regulatory authority having
jurisdiction over you, (vii) the National Association of
Insurance Commissioners or any similar organization, or any
nationally recognized rating agency that requires access to
information about your investment portfolio or (viii) any
other Person to which such delivery or disclosure may be
necessary or appropriate (w) to effect compliance with any
law, rule, regulation or order applicable to you, (x) in
response to any subpoena or other legal process, (y) in
connection with any litigation to which you are a party or
(z) if an Event of Default has occurred and is continuing,
to the extent you may reasonably determine such delivery and
disclosure to be necessary or appropriate in the enforcement
or for the protection of the rights and remedies under your
Notes and this Agreement.  Each Noteholder, by its
acceptance of a Note, will be deemed to have agreed to be
bound by and to be entitled to the benefits of this Section
21 as though it were a party to this Agreement.  On
reasonable request by the Company in connection with the
delivery to any Noteholder of information required to be
delivered to such Noteholder under this Agreement or
requested by such Noteholder (other than a Noteholder that
is a party to this Agreement or its nominee), such
Noteholder will enter into an agreement with the Obligors
embodying the provisions of this Section 21.

22.  SUBSTITUTION OF PURCHASER

You shall have the right to substitute any one of your
Affiliates as the purchaser of the Notes that you have
agreed to purchase hereunder, by written notice to the
Company, which notice shall be signed by both you and such
Affiliate, shall contain such Affiliate's agreement to be
bound by this Agreement and shall contain a confirmation by
such Affiliate of the accuracy with respect to it of the
representations set forth in Section 6.  Upon receipt of
such notice, wherever the word "you" is used in this
Agreement (other than in this Section 22), such word shall
be deemed to refer to such Affiliate in lieu of you.  In the
event that such Affiliate is so substituted as a purchaser
hereunder and such Affiliate thereafter transfers to you all
of the Notes then held by such Affiliate, upon receipt by
the Company of notice of such transfer, wherever the word
"you" is used in this Agreement (other than in this Section
22), such word shall no longer be deemed to refer to such
Affiliate, but shall refer to you, and you shall have all
the rights of an original holder of the Notes under this
Agreement.

                                                                 Page 43


23.  MISCELLANEOUS

23.1 Successors and Assigns

All covenants and other agreements contained in this
Agreement by or on behalf of any of the parties hereto bind
and inure to the benefit of their respective successors and
assigns (including, without limitation, any subsequent
Noteholder) whether so expressed or not.

23.2 Payments Due on Non-Business Days

Anything in this Agreement or the Notes to the contrary
notwithstanding, any payment of principal of or Make-Whole
Amount or Modified Make-Whole Amount or interest on any Note
that is due on a date other than a Business Day shall be
made on the next succeeding Business Day without including
the additional days elapsed in the computation of the
interest payable on such next succeeding Business Day.

23.3 Severability

Any provision of this Agreement that is prohibited or
unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such
prohibition or unenforceability without invalidating the
remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall (to the full
extent permitted by law) not invalidate or render
unenforceable such provision in any other jurisdiction.

23.4 Construction

Each covenant contained herein shall be construed (absent
express provision to the contrary) as being independent of
each other covenant contained herein, so that compliance
with any one covenant shall not (absent such an express
contrary provision) be deemed to excuse compliance with any
other covenant.  Where any provision herein refers to action
to be taken by any Person, or which such Person is
prohibited from taking, such provision shall be applicable
whether such action is taken directly or indirectly by such
Person.

23.5 Counterparts

This Agreement may be executed in any number of
counterparts, each of which shall be an original but all of
which together shall constitute one instrument.  Each
counterpart may consist of a number of copies hereof, each
signed by less than all, but together signed by all, of the
parties hereto.

23.6 Governing Law

This Agreement shall be construed in accordance with, and
this Agreement and all matters arising out of or relating in
any way whatsoever to this Agreement (whether in contract,
tort or otherwise) shall be governed by, the law of the
State of New York.

                                                                 Page 44


If you are in agreement with the foregoing, please sign the
form of agreement on the accompanying counterpart of this
Agreement and return it to the Company and the Guarantor,
whereupon the foregoing shall become a binding agreement
between you, the Company and the Guarantor.

Very truly yours,

UNS GAS, INC.

By ____________________________
Name:
Title:

UNISOURCE ENERGY SERVICES, INC.

By ____________________________
Name:
Title:



The foregoing is hereby agreed to as of the date thereof.

JOHN HANCOCK LIFE INSURANCE COMPANY

By ____________________________
Name:
Title:

JOHN HANCOCK VARIABLE
LIFE INSURANCE COMPANY

By ____________________________
Name:
Title:

INVESTORS PARTNER
LIFE INSURANCE COMPANY

By ____________________________
Name:
Title:

JOHN HANCOCK INSURANCE
COMPANY OF VERMONT

By ____________________________
Name:
Title:

TEACHERS INSURANCE AND ANNUITY
ASSOCIATION OF AMERICA

By ____________________________
Name:
Title:

ALLSTATE LIFE INSURANCE COMPANY


By ____________________________
Name:
Title:  Authorized Signatory


By ____________________________
Name:
Title:  Authorized Signatory





                                                                 Page 47


                           SCHEDULE B

                          DEFINED TERMS



As used herein, the following terms have the respective
meanings set forth below or set forth in the Section hereof
following such term:

ACC means the Arizona Corporation Commission.

ACC Settlement Agreement means the settlement agreement
dated as of April 1, 2003 between the Staff of the ACC
Utilities Division, UniSource Energy, Tucson Electric Power
and Citizens.

Acquisition is defined in Section 1.1(c).

Acquisition Documents means the GasCo Purchase
Agreement and the agreements and instruments referred to
therein.

Affiliate means, at any time, and with respect to any
Person, (a) any other Person that at such time directly or
indirectly through one or more intermediaries Controls, or
is Controlled by, or is under common Control with, such
first Person, and (b) any Person beneficially owning or
holding, directly or indirectly, 10% or more of any class of
voting or equity interests of any Obligor or any Subsidiary
or any corporation of which any Obligor and its Subsidiaries
beneficially own or hold, in the aggregate, directly or
indirectly, 10% or more of any class of voting or equity
interests.  As used in this definition, Control means the
possession, directly or indirectly, of the power to direct
or cause the direction of the management and policies of a
Person, whether through the ownership of voting securities,
by contract or otherwise.  Unless the context otherwise
clearly requires, any reference to an "Affiliate" is a
reference to an Affiliate of an Obligor.

Assets is defined in Section 1.1(c).

Business Day means any day other than a Saturday, a
Sunday or a day on which commercial banks in New York City
are required or authorized to be closed.

Capital Lease means, at any time, a lease with respect
to which the lessee is required concurrently to recognize
the acquisition of an asset and the incurrence of a
liability in accordance with GAAP.

Capital Lease Obligation means, with respect to any
Person and a Capital Lease, the amount of the obligation of
such Person as the lessee under such Capital Lease which
would, in accordance with GAAP, appear as a liability on a
balance sheet of such Person.

Change of Control means any of the following events or
circumstances:

                                                                 Page 48


(a)  the failure of UniSource Energy directly or indirectly
     to beneficially own in the aggregate at least a majority of
     the shares of the Guarantor's voting stock outstanding; and

(b)  the acquisition after the date hereof by any person (as
     such term is used in section 13(d) and section 14(d)(2) of
     the Exchange Act as in effect on the date of the Closing)
     other than UniSource Energy or related persons constituting
     a group (as such term is used in Rule 13d-5 under the
     Exchange Act as in effect on the date of the Closing) of the
     power to elect, appoint or cause the election or appointment
     of at least a majority of the members of the board of
     directors of the Guarantor, through beneficial ownership of
     the capital stock of the Guarantor or otherwise; provided
     that the acquisition by any such person or group of the
     power to elect at least a majority of the Board of Directors
     of UniSource Energy shall not be deemed to constitute the
     acquisition of the power to elect at least a majority of the
     Board of Directors of the Guarantor by a person other than
     UniSource Energy for the purpose of this subsection (b).

Change of Control Notice is defined in Section 8.4.

Change of Control Prepayment Date is defined in Section 8.4.

Citizens means Citizens Communications Company, a
corporation incorporated under the law of the State of
Delaware.

Closing is defined in Section 3.

Code means the Internal Revenue Code of 1986, as
amended from time to time, and the rules and regulations
promulgated thereunder from time to time.

Company means UNS Gas, Inc., a corporation incorporated
under the law of the State of Arizona.

Company Successor is defined in Section 10.2(a)(i).

Confidential Information is defined in Section 21.

Consolidated Debt means, with respect to any Obligor as
of any date of determination, the total of all Indebtedness
of such Obligor and its Subsidiaries outstanding on such
date, after eliminating all offsetting debits and credits
between such Obligor and its Subsidiaries and all other
items required to be eliminated in the course of the
preparation of consolidated financial statements of such
Obligor and its Subsidiaries in accordance with GAAP.

Consolidated Income Available for Interest Charges means,
with respect to any period, Consolidated Net Income of the
Company for such period plus all amounts deducted in the
computation thereof on account of (a) Interest Charges, (b)
taxes imposed on or measured by income or excess profits,
and (c) the amount of all depreciation and

                                                                 Page 49


amortization allowances and other non cash expenses of the
Company and its Subsidiaries for such period.

Consolidated Long Term Debt means, as of any date of
determination, the total of all Long Term Debt of the
Company and its Subsidiaries outstanding on such date, after
eliminating all offsetting debits and credits between the
Company and its Subsidiaries and all other items required to
be eliminated in the course of the preparation of
consolidated financial statements of the Company and its
Subsidiaries in accordance with GAAP

Consolidated Net Income means, with respect to any
Obligor and with reference to any fiscal period, the net
income (or loss) of such Obligor and its Subsidiaries for
such period (taken as a cumulative whole), as determined in
accordance with GAAP, after eliminating all offsetting
debits and credits between such Obligor and its Subsidiaries
and all other items required to be eliminated in the course
of the preparation of consolidated financial statements of
such Obligor and its Subsidiaries in accordance with GAAP,
adjusted to exclude (a) any extraordinary gain or loss
reflected in the net income (or loss) for the Company and
its Subsidiaries for such period and (b) any cumulative
effect of a change in accounting principles reflected in the
net income (or loss) for the Company and its Subsidiaries
for such period.

Consolidated Net Worth means, with respect to any
Person at any time:

(a)  the total assets of such Person and its Subsidiaries
     which would be shown as assets on a consolidated balance
     sheet of such Person and its Subsidiaries as of such time
     prepared in accordance with GAAP, after eliminating all
     amounts properly attributable to minority interests, if any,
     in the stock and surplus of Subsidiaries; minus

(b)  the total liabilities of such Person and its
     Subsidiaries which would be shown as liabilities on a
     consolidated balance sheet of such Person and its
     Subsidiaries as of such time prepared in accordance with
     GAAP; minus

(c)  the net book value of all assets (other than intangible
     assets eligible for cost recovery through regulatory rates)
     of such Person and its Subsidiaries, after deducting any
     reserves applicable thereto, which would be treated as
     intangible under GAAP, including, without limitation, good
     will, trademarks, trade names, service marks, brand names,
     copyrights, patents, unamortized debt discount and expense
     and organizational expenses.

Consolidated Total Capitalization means at any time,
the sum of Consolidated Net Worth of the Company and
Consolidated Debt of the Company at such time.

Current Debt means, with respect to any Person, all
Indebtedness of such Person which by its terms or by the
terms of any instrument or agreement relating thereto
matures on demand or within one year from the date of the
creation thereof and is not directly or

                                                                 Page 50


indirectly renewable or extendible at the option of the obligor
in respect thereof to a date one year or more from such date
without meeting the conditions applicable to a new borrowing.

Current Maturities of Long Term Debt means, at any time
and with respect to any item of Long Term Debt, the portion
of such Long Term Debt outstanding at such time which by the
terms of such Long Term Debt or the terms of any instrument
or agreement relating thereto is due on demand or within one
year from such time (whether by sinking fund, other required
prepayment or final payment at maturity) and is not directly
or indirectly renewable, extendible or refundable at the
option of the obligor under an agreement or firm commitment
in effect at such time to a date one year or more from such
time.

Default means an event or condition the occurrence or
existence of which would, with the lapse of time or the
giving of notice or both, become an Event of Default.

Default Rate means that rate of interest that is 2% per
annum above the rate of interest stated in clause (a) of the
first paragraph of the Notes.

Distribution means, in respect of any corporation,
association or other business entity:

(a)  dividends or other distributions or payments on capital
     stock or other equity interest of such corporation,
     association or other business entity (except distributions
     in such stock or other equity interest); and

(b)  the redemption or acquisition of such stock or other
     equity interests or of warrants, rights or other options to
     purchase such stock or other equity interests (except when
     solely in exchange for such stock or other equity interests)
     unless made, contemporaneously, from the net proceeds of a
     sale of such stock or other equity interests.

ElecCo means UNS Electric, Inc., a corporation
incorporated under the law of the State of Arizona.

ElecCo Note Purchase and Guaranty Agreement means the
Note Purchase and Guaranty Agreement dated as of the date
hereof between ElecCo, the Guarantor and the Purchasers.

ElecCo Notes means the notes issued by ElecCo pursuant
to the ElecCo Note Purchase and Guaranty Agreement.

Environmental Laws means any and all Federal, state,
local, and foreign statutes, laws, regulations, ordinances,
rules, judgments, orders, decrees, permits, concessions,
grants, franchises, licenses, agreements or governmental
restrictions relating to pollution and the protection of the
environment or the release of any materials into the
environment,

                                                                 Page 51


including but not limited to those related to hazardous
substances or wastes, air emissions and discharges to waste or
public systems.

ERISA means the Employee Retirement Income  Security
Act of 1974, as amended from time to time, and the rules and
regulations promulgated thereunder from time to time in
effect.

ERISA Affiliate means, with respect to an Obligor, any
trade or business  (whether or not incorporated) that is
treated as a single employer together with such Obligor
under section 414 of the Code.

Event of Default is defined in Section 12.

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

Fair Market Value means, at any time and with respect
to any Property, the sale value of such Property that would
be realized in an arm's-length sale at such time between an
informed and willing buyer and an informed and willing
seller (neither being under a compulsion to buy or sell).

Financing Documents means this Agreement, the Other
Agreements, and the Notes.

GAAP means generally accepted accounting principles as
in effect from time to time in the United States of America.

GasCo Guaranteed Obligations is defined in Section 11.1.

GasCo Purchase Agreement is defined in Section 1.1(c).

Governmental Approval means all approvals, permits,
waivers, exemptions, consents, variances, franchises,
registrations, authorizations, licenses or similar orders
of, or from, any Governmental Authority.

Governmental Authority means:

(a)  the government of

        (i)   the United States of America or any State or other
              political subdivision thereof, or

        (ii)  any jurisdiction in which any Obligor or any Subsidiary
              thereof conducts all or any part of its business, or which
              asserts jurisdiction over any Properties of any Obligor or
              any Subsidiary thereof, or

(b)  any entity exercising executive, legislative, judicial,
     regulatory or administrative functions of, or pertaining to,
     any such government.

                                                                 Page 52


Governmental Rule means any statute, law, regulation,
ordinance, rule, judgment, order, decree, permit,
license, concession, directive, guideline, policy or
rule of common law, requirement of, or other
governmental restriction or any similar form of
decision of or determination by, or any interpretation
or administration of any of the foregoing by, any
Governmental Authority, whether now or hereafter in
effect.

Guaranties means, collectively, the guaranty set forth
in Section 11 of this Agreement and the Other Agreements.

Guarantor means UniSource Energy Services, Inc., a
corporation incorporated under the law of the State of
Arizona.

Guarantor Successor is defined in Section 10.2(a)(i).

Guaranty Obligation means, with respect to any Person,
any obligation (except the endorsement in the ordinary
course of business of negotiable instruments for deposit or
collection) of such Person guaranteeing or in effect
guaranteeing any Indebtedness, dividend or other obligation
of any other Person in any manner, whether directly or
indirectly, including (without limitation) obligations
incurred through an agreement, contingent or otherwise, by
such Person:

(a)  to purchase such Indebtedness or obligation or any
     Property constituting security therefor;

(b)  to advance or supply funds (i) for the purchase or
     payment of such Indebtedness or obligation, or (ii) to
     maintain any working capital or other balance sheet
     condition or any income statement condition of any other
     Person or otherwise to advance or make available funds for
     the purchase or payment of such Indebtedness or obligation;

(c)  to lease Properties or to purchase Properties or
     services primarily for the purpose of assuring the owner of
     such Indebtedness or obligation of the ability of any other
     Person to make payment of the Indebtedness or obligation; or

(d)  otherwise to assure the owner of such Indebtedness or
     obligation against loss in respect thereof.

In any computation of the Indebtedness or other
liabilities of the obligor under any Guaranty Obligation,
the Indebtedness or other obligations that are the subject
of such Guaranty Obligation shall be assumed to be direct
obligations of such obligor.

Hazardous Material means any and all pollutants, toxic
or hazardous wastes or any other substances that might pose
a hazard to health or safety, the removal of which may be
required or the generation, manufacture, refining,
production, processing, treatment, storage, handling,
transportation, transfer, use, disposal, release, discharge,
spillage, seepage, or filtration of which is or shall be
restricted, prohibited or penalized by any

                                                                 Page 53


applicable law (including, without limitation, asbestos, urea
formaldehyde foam insulation and polycholorinated biphenyls).

holder means, with respect to any Note, the Person in
whose name such Note is registered in the register
maintained by the Company pursuant to Section 14.1.

Indebtedness with respect to any Person means, at any
time, without duplication,

(a)  its liabilities for borrowed money and its redemption
     obligations in respect of mandatorily redeemable Preferred
     Stock;

(b)  its liabilities for the deferred purchase price of
     Property acquired by such Person (excluding accounts payable
     arising in the ordinary course of business but including all
     liabilities created or arising under any conditional sale or
     other title retention agreement with respect to any such
     Property);

(c)  all liabilities appearing on its balance sheet in
     accordance with GAAP in respect of Capital Leases;

(d)  all liabilities for borrowed money secured by any Lien
     with respect to any Property owned by such Person (whether
     or not it has assumed or otherwise become liable for such
     liabilities);

(e)  all its liabilities in respect of letters of credit or
     instruments serving a similar function issued or accepted
     for its account by banks and other financial institutions
     (whether or not representing obligations for borrowed
     money);

(f)  Swaps of such Person; and

(g)  any Guaranty Obligation of such Person with respect to
     liabilities of a type described in any of clauses (a)
     through (f) hereof.

Indebtedness of any Person shall include all
obligations of such Person of the character described in
clauses (a) through (g) to the extent such Person remains
legally liable in respect thereof notwithstanding that any
such obligation is deemed to be extinguished under GAAP.

Insolvency Proceeding is defined in Section 11.2(d).

Institutional Investor means (a) any original purchaser
of a Note and any Affiliate thereof, (b) any holder of a
Note holding more than $4,000,000 of the aggregate principal
amount of the Notes then outstanding and any Affiliate
thereof, and (c) any bank, trust company, savings and loan
association or other financial institution, any pension
plan, any investment company, any insurance company, any
broker or dealer, or any other similar financial institution
or entity, regardless of legal form, and any Affiliate
thereof.

                                                                 Page 54


Interest Charges means, with respect to any period, the
sum (without duplication) of the following (in each case,
eliminating all offsetting debits and credits between the
Company and its Subsidiaries and all other items required to
be eliminated in the course of the preparation of
consolidated financial statements of the Company and its
Subsidiaries in accordance with GAAP): (a) all interest in
respect of Indebtedness of the Company and its Subsidiaries
(including imputed interest on Capital Lease Obligations)
deducted in determining Consolidated Net Income for such
period, together with all interest capitalized or deferred
during such period and not deducted in determining
Consolidated Net Income for such period, and (b) to the
extent actually paid, all debt discount and expense
amortized or required to be amortized in the determination
of Consolidated Net Income for such period.

Interest Coverage Ratio means, with respect to the
Company for any period, the ratio of (a) Consolidated Income
Available for Interest Charges for such period to (b)
Interest Charges for such period.

Lien means, with respect to any Person, any mortgage,
lien, pledge, charge, security interest or other
encumbrance, or any interest or title of any vendor, lessor,
lender or other secured party to or of such Person under any
conditional sale or other title retention agreement or
Capital Lease, upon or with respect to any Property or asset
of such Person (including in the case of stock, stockholder
agreements, voting trust agreements and all similar
arrangements).

Long Term Debt means, with respect to any Person, all
Indebtedness of such Person which by its terms or by the
terms of any instrument or agreement relating thereto
matures, or which is otherwise payable or unpaid, one year
or more from, or is directly or indirectly renewable or
extendible at the option of the obligor in respect thereof
to a date one year or more (including, without limitation,
an option of such obligor under a revolving credit or
similar agreement obligating the lender or lenders to extend
credit over a period of one year or more) from, the date of
the creation thereof, provided that Long Term Debt shall
include, as at any date of determination, Current Maturities
of Long Term Debt.

Make-Whole Amount is defined in Section 8.6.

Material means, with respect to an Obligor, material in
relation to the business, operations, affairs, financial
condition, assets, Properties or prospects of such Obligor
and its Subsidiaries taken as a whole.

Material Adverse Effect means, with respect to an
Obligor, a material adverse effect on (a) the business,
operations, affairs, financial condition, assets or
Properties of such Obligor and its Subsidiaries taken as a
whole, or (b) the ability of such Obligor to perform its
obligations under this Agreement and the Notes, or (c) the
validity or enforceability of this Agreement or the Notes.

Memorandum is defined in Section 5.3.

                                                                 Page 55


Modified Make-Whole Amount means the Make-Whole Amount;
provided that the definition of "Reinvestment Yield'' in the
definition of Make-Whole Amount shall be amended such that
50 basis points shall be replaced with 150 basis points.

Multiemployer Plan means any Plan that is a
"multiemployer plan" (as such term is defined in section
4001(a)(3) of ERISA).

Noteholders  means the holders from time to time of the
Notes.

Notes is defined in Section 1.

Officer's Certificate means, with respect to an
Obligor, a certificate of a Senior Financial Officer of such
Obligor or of any other officer of such Obligor whose
responsibilities extend to the subject matter of such
certificate.

Other Agreements is defined in Section 2.

Other Purchasers is defined in Section 2.

PBGC means the Pension Benefit Guaranty Corporation
referred to and defined in ERISA or any successor thereto.

Person means an individual, partnership, corporation,
limited liability company, association, trust,
unincorporated organization, or a government or agency or
political subdivision thereof.

Permitted Lien means, with respect to any Person, each
of the following:

(a)  Liens for taxes, assessments or other governmental
     charges which are not yet due and payable or the payment of
     which is not at the time required by Section 9.4 of this
     Agreement;

(b)  statutory Liens of landlords and Liens of carriers,
     warehousemen, mechanics, materialmen and other similar
     Liens, in each case, incurred in the ordinary course of
     business for sums not yet due and payable or the payment of
     which is not at the time required by Section 9.4 of this
     Agreement;

(c)  Liens (other than any Lien imposed by ERISA) incurred
     or deposits made in the ordinary course of business (i) in
     connection with workers' compensation, unemployment
     insurance and other types of social security or retirement
     benefits, or (ii) to secure (or to obtain letters of credit
     that secure) the performance of tenders, statutory
     obligations, surety bonds, appeal bonds, bids, leases (other
     than Capital Leases), performance bonds, purchase,
     construction or sales contracts and other similar
     obligations, in each case not incurred or made in connection
     with the borrowing of money, the obtaining of advances or
     credit or the payment of the deferred purchase price of
     Property;

                                                                 Page 56


(d)  any attachment or judgment Lien, unless the judgment it
     secures shall not, within sixty days after the entry
     thereof, have been discharged or execution thereof stayed
     pending appeal, or shall not have been discharged within
     sixty days after the expiration of any such stay;

(e)  leases or subleases granted to others, easements,
     rights-of-way, restrictions and other similar charges or
     encumbrances, in each case incidental to, and not
     interfering with, the ordinary conduct of the business of
     the Company, provided that such Liens do not, in the
     aggregate, materially detract from the value of such
     Property;

(f)  any Lien created to secure all or any part of the
     purchase price, or to secure Indebtedness incurred or
     assumed to pay all or any part of the purchase price or cost
     of construction, of property (or any improvement thereon)
     acquired or constructed by such Person or a Subsidiary of
     such Person after the date of the Closing, provided that:

        (i)   any such Lien shall extend solely to the item or items
              of such property (or improvement thereon) so acquired or
              constructed and, if required by the terms of the instrument
              originally creating such Lien, other property (or
              improvement thereon) which is an improvement to or is
              acquired for specific use in connection with such acquired
              or constructed property (or improvement thereon) or which is
              real property being improved by such acquired or constructed
              property (or improvement thereon);

        (ii)  the principal amount of the Indebtedness secured by any
              such Lien shall not, at the time such Lien is created,
              exceed an amount equal to the lesser of (A) the cost to such
              Person or such Subsidiary of the property (or improvement
              thereon) so acquired or constructed and (B) the Fair Market
              Value (as determined in good faith by the board of directors
              of such Person) of such property (or improvement thereon) at
              the time of such acquisition or construction; and

        (iii) any such Lien shall be created contemporaneously
              with, or within 90 days after, the acquisition or
              construction of such property;

(g)  Liens in existence on the date of the Closing securing
     the payment or performance of any liabilities assumed by the
     Company pursuant to the Acquisition Documents; and

(h)  with respect to any Asset which consists of a leasehold
     or other possessory interest in real property, Liens to
     which the underlying fee estate in such real property is
     subject that do not and will not result in a Material
     Adverse Effect.

Permitted Reimbursement Obligation means any liability of
the Company of the type referred to in clause (e) of the
definition of "Indebtedness" provided that such liability is

                                                                 Page 57


not created in connection with a letter of credit or
instrument serving a similar function related to
Indebtedness for money borrowed and provided such liability
is immediately due and payable upon the related payment
under such letter of credit or similar instrument.

Plan means, with respect to an Obligor, an "employee benefit
plan" (as defined in section 3(3) of ERISA) that is subject
to Title IV of ERISA and Section 412 of the Code and that is
or, within the preceding five years, has been established or
maintained, or to which contributions are or, within the
preceding five years, have been made or required to be made,
by such Obligor or any ERISA Affiliate or with respect to
which such Obligor or any ERISA Affiliate may have any
liability.

Preferred Stock means any class of capital stock of a
corporation that is preferred over any other class of
capital stock of such corporation as to the payment of
dividends or the payment of any amount upon liquidation or
dissolution of such corporation.

Property or Properties means, unless otherwise
specifically limited, real or personal property of any kind,
tangible or intangible, choate or inchoate.

PUHCA means the Public Utility Holding Company Act of
1935, as amended.

QPAM Exemption means Prohibited Transaction Class
Exemption 84-14 issued by the United States Department of
Labor.

Required Holders means, at any time, the holders of at
least 51% in principal amount of the Notes at the time
outstanding (exclusive of Notes then owned by the Company or
any of its Affiliates).

Response Date is defined in Section 8.4.

Responsible Officer means any Senior Financial Officer
of an Obligor and any other officer of an Obligor with
responsibility for the administration of the relevant
portion of this agreement.

Restricted Payment means any Distribution in respect of
any Person or any Subsidiary of such Person (other than on
account of capital stock or other equity interests of a
Subsidiary owned legally and beneficially by such Person or
another Subsidiary of such Person), including, without
limitation, any Distribution resulting in the acquisition by
such Person of Securities which would constitute treasury
stock.  For purposes of this Agreement, the amount of any
Restricted Payment made in Property shall be the greater of
(x) the Fair Market Value of such Property (as determined in
good faith by the board of directors (or equivalent
governing body) of the Person making such Restricted
Payment) and (y) the net book value thereof on the books of
such Person, in each case determined as of the date on which
such Restricted Payment is made.

                                                                 Page 58


Sanctioned Person means (i) any Person designated in the
list of Specially Designated Nationals and Blocked Persons
published by the Office of Foreign Assets Control of the
U.S. Department of the Treasury, as amended from time to
time; and (ii) any other Person with which transactions are
prohibited under U.S. Economic Sanctions Law.

Securities Act means the Securities Act of 1933, as
amended from time to time.

Security has the meaning set forth in section 2(1) of
the Securities Act.

Senior Financial Officer means, with respect to any
Person, the chief financial officer, principal accounting
officer, treasurer or comptroller of such Person.

Series is defined in Section 1.2.

Series A Notes is defined in Section 1.2.

Series B Notes is defined in Section 1.2.

Subsidiary means, as to any Person, any corporation,
association or other business entity in which such Person or
one or more of its Subsidiaries or such Person and one or
more of its Subsidiaries owns sufficient equity or voting
interests to enable it or them (as a group) ordinarily, in
the absence of contingencies, to elect a majority of the
directors (or Persons performing similar functions) of such
entity, and any partnership or joint venture if more than a
50% interest in the profits or capital thereof is owned by
such Person or one or more of its Subsidiaries or such
Person and one or more of its Subsidiaries (unless such
partnership can and does ordinarily take major business
actions without the prior approval of such Person or one or
more of its Subsidiaries).  Unless the context otherwise
clearly requires, any reference to a Subsidiary is a
reference to a Subsidiary of the Guarantor.

Swaps means, with respect to any Person, payment
obligations with respect to interest rate swaps, currency
swaps and similar obligations obligating such Person to make
payments, whether periodically or upon the happening of a
contingency.  For the purposes of this Agreement, the amount
of the obligation under any Swap shall be the amount
determined in respect thereof as of the end of the then most
recently ended fiscal quarter of such Person, based on the
assumption that such Swap had terminated at the end of such
fiscal quarter, and in making such determination, if any
agreement relating to such Swap provides for the netting of
amounts payable by and to such Person thereunder or if any
such agreement provides for the simultaneous payment of
amounts by and to such Person, then in each such case, the
amount of such obligation shall be the net amount so
determined.

Transaction Documents means the Financing Documents and
the Acquisition Documents.

                                                                 Page 59


UniSource Energy means UniSource Energy Corporation, a
corporation incorporated under the law of the State of
Arizona.

U.S. Economic Sanctions Law means (a) the International
Emergency Economic Powers Act of 1977, as amended, the
Trading with the Enemy Act of 1917, as amended, and any
executive order issued thereunder and in effect from time to
time and (b) the foreign assets control regulations of the
U.S. Department of the Treasury, codified at Title 31,
Subtitle B, Chapter V of the Code of Federal Regulations, as
amended, and any enabling legislation thereof.

Wholly-Owned Subsidiary means, at any time, any
Subsidiary one hundred percent (100%) of all of the equity
interests (except directors' qualifying shares) and voting
interests of which are owned by any one or more of any
Obligor and such Obligor's other Wholly-Owned Subsidiaries
at such time.

                                                                 Page 60




                         EXHIBIT 1-A

                    FORM OF SERIES A NOTE



                        UNS GAS, INC.

       6.23% SERIES A SENIOR NOTE DUE AUGUST 11, 2011



No. [_____]                                           [Date]

$[_______]                                   PPN 90312* AA 2

FOR VALUE RECEIVED, the undersigned, UNS GAS, INC. (herein
called the Company), a corporation organized and existing
under the laws of the State of Arizona, hereby promises to
pay to [____________], or registered assigns, the principal
sum of [________________] DOLLARS on August 11, 2011, with
interest (computed on the basis of a 360-day year of twelve
30-day months) (a) on the unpaid balance thereof at the rate
of 6.23% per annum from the date hereof, payable
semiannually, on the 15th day of February and August in each
year, commencing with the February or August next succeeding
the date hereof, until the principal hereof shall have
become due and payable, and (b) to the extent permitted by
law on any overdue payment (including any overdue
prepayment) of principal, any overdue payment of interest
and any overdue payment of any Make-Whole Amount or Modified
Make-Whole Amount (each as defined in the Note Purchase
Agreements referred to below), payable semiannually as
aforesaid (or, at the option of the registered holder
hereof, on demand), at a rate per annum from time to time
equal to 8.23%.

Payments of principal of, interest on and any Make-Whole
Amount or Modified Make-Whole Amount with respect to this
Note are to be made in lawful money of the United States of
America in New York, New York or at such other place as the
Company shall have designated by written notice to the
holder of this Note as provided in the Note Purchase
Agreements referred to below.

This Note is one of a series of Senior Notes (herein called
the Notes) issued pursuant to separate Note Purchase and
Guaranty Agreements, dated as of August 11, 2003 (as from
time to time amended, the Note Purchase Agreements), between
the Company, UniSource Energy Services, Inc. and the
respective Purchasers named therein and is entitled to the
benefits thereof.  Each holder of this Note will be deemed,
by its acceptance hereof, (i) to have agreed to the
confidentiality provisions set forth in Section 21 of the
Note Purchase Agreements and (ii) to have made the
representation set forth in Section 6.2 of the Note Purchase
Agreements.  This Note is guaranteed pursuant to and in
accordance with the terms of the Note Purchase Agreement.
Subject to the terms of said



Note Purchase Agreement, the holder of this Note is entitled to
enforce the provisions of such Note Purchase Agreement, and to
enjoy the benefits thereof.

This Note is a registered Note and, as provided in the Note
Purchase Agreements, upon surrender of this Note for
registration of transfer, duly endorsed, or accompanied by a
written instrument of transfer duly executed, by the
registered holder hereof or such holder's attorney duly
authorized in writing, a new Note for a like principal
amount will be issued to, and registered in the name of, the
transferee.  Prior to due presentment for registration of
transfer, the Company may treat the person in whose name
this Note is registered as the owner hereof for the purpose
of receiving payment and for all other purposes, and the
Company will not be affected by any notice to the contrary.

The Company will make required prepayments of principal on
the dates and in the amounts specified in the Note Purchase
Agreements.  This Note is also subject to optional
prepayment, in whole or from time to time in part, at the
times and on the terms specified in the Note Purchase
Agreements, but not otherwise.

If an Event of Default, as defined in the Note Purchase
Agreements, occurs and is continuing, the principal of this
Note may be declared or otherwise become due and payable in
the manner, at the price (including any applicable Make-
Whole Amount or Modified Make-Whole Amount) and with the
effect provided in the Note Purchase Agreements.

This Note shall be construed in accordance with, and this
Note and all matters arising out of or relating in any way
whatsoever to this Note (whether in contract, tort or
otherwise) shall be governed by, the law of the State of New
York.





UNS GAS, INC.

By_________________________
Name:
Title:






                         EXHIBIT 1-B

                    FORM OF SERIES B NOTE



                        UNS GAS, INC.

            6.23% SENIOR NOTE DUE AUGUST 11, 2015



No. [_____]                                           [Date]

$[_______]                                   PPN 90312* AB 0

FOR VALUE RECEIVED, the undersigned, UNS GAS, INC. (herein
called the Company), a corporation organized and existing
under the laws of the State of Arizona, hereby promises to
pay to [____________], or registered assigns, the principal
sum of [________________] DOLLARS on August 11, 2015, with
interest (computed on the basis of a 360-day year of twelve
30-day months) (a) on the unpaid balance thereof at the rate
of 6.23% per annum from the date hereof, payable
semiannually, on the 15th day of February and August in each
year, commencing with the February or August next succeeding
the date hereof, until the principal hereof shall have
become due and payable, and (b) to the extent permitted by
law on any overdue payment (including any overdue
prepayment) of principal, any overdue payment of interest
and any overdue payment of any Make-Whole Amount or Modified
Make-Whole Amount (each as defined in the Note Purchase
Agreements referred to below), payable semiannually as
aforesaid (or, at the option of the registered holder
hereof, on demand), at a rate per annum from time to time
equal to 8.23%.

Payments of principal of, interest on and any Make-Whole
Amount or Modified Make-Whole Amount with respect to this
Note are to be made in lawful money of the United States of
America in New York, New York or at such other place as the
Company shall have designated by written notice to the
holder of this Note as provided in the Note Purchase
Agreements referred to below.

This Note is one of a series of Senior Notes (herein called
the Notes) issued pursuant to separate Note Purchase
Agreements, dated as of August 11, 2003 (as from time to
time amended, the Note Purchase Agreements), between the
Company, UniSource Energy Services, Inc. and the respective
Purchasers named therein and is entitled to the benefits
thereof.  Each holder of this Note will be deemed, by its
acceptance hereof, (i) to have agreed to the confidentiality
provisions set forth in Section 21 of the Note Purchase
Agreements and (ii) to have made the representation set
forth in Section 6.2 of the Note Purchase Agreements.  This
Note is guaranteed pursuant to and in accordance with the
terms of the Note Purchase



Agreement.  Subject to the terms of said Note Purchase
Agreement, the holder of this Note is entitled to enforce
the provisions of such Note Purchase Agreement, and to enjoy
the benefits thereof.

This Note is a registered Note and, as provided in the Note
Purchase Agreements, upon surrender of this Note for
registration of transfer, duly endorsed, or accompanied by a
written instrument of transfer duly executed, by the
registered holder hereof or such holder's attorney duly
authorized in writing, a new Note for a like principal
amount will be issued to, and registered in the name of, the
transferee.  Prior to due presentment for registration of
transfer, the Company may treat the person in whose name
this Note is registered as the owner hereof for the purpose
of receiving payment and for all other purposes, and the
Company will not be affected by any notice to the contrary.

The Company will make required prepayments of principal on
the dates and in the amounts specified in the Note Purchase
Agreements.  This Note is also subject to optional
prepayment, in whole or from time to time in part, at the
times and on the terms specified in the Note Purchase
Agreements, but not otherwise.

If an Event of Default, as defined in the Note Purchase
Agreements, occurs and is continuing, the principal of this
Note may be declared or otherwise become due and payable in
the manner, at the price (including any applicable Make-
Whole Amount or Modified Make-Whole Amount) and with the
effect provided in the Note Purchase Agreements.

This Note shall be construed in accordance with, and this
Note and all matters arising out of or relating in any way
whatsoever to this Note (whether in contract, tort or
otherwise) shall be governed by, the law of the State of New
York.





UNS GAS, INC.

By_________________________
Name:
Title:




August 11, 2003

                        UNS GAS, INC.

               UNISOURCE ENERGY SERVICES, INC.




    SERIES A GUARANTEED SENIOR NOTES DUE AUGUST 11, 2011

    SERIES B GUARANTEED SENIOR NOTES DUE AUGUST 11, 2015






               ===============================
                      NOTE PURCHASE AND

                     GUARANTY AGREEMENT
               ===============================