Centerpoint Energy - Mississippi River

Third Revised Volume No. 1

Effective Date: 01/21/2008, Docket: RP08-135-000, Status: Effective

First Revised Sheet No. 291A First Revised Sheet No. 291A : Effective

Superseding: Original Sheet No. 291A

Contract # ___________

TRANSPORTATION SERVICE AGREEMENT

FOR RATE SCHEDULE [FSS AND ISS]

EXHIBIT A

Page 1 of 2

[If more than one Agreement is covered by an Exhibit A, specify other contract numbers]

Customer agrees to pay the rates specified on this Exhibit A for performance of certain gas transportation

service under the Agreement(s) specified above. These rates are applicable only in accordance with the

following:

RATES AND APPLICABILITY:

(a) General: In consideration for Customer's continuing compliance with the provisions of the

Transportation Service Agreement(s) ("Agreement") specified above, the transportation rates and charges

as defined below for the specified services provided under the Agreement only apply to the quantities

and/or time periods described herein. In addition to any rate or amount referred to herein (including

discounted rates, Negotiated Rates, overrun rates and maximum tariff rates), Customer shall provide or

pay and MRT shall retain or charge Fuel Use and LUFG allowances or charges in such quantities or

amounts as authorized from time to time by MRT's tariff and, except as specifically provided otherwise

herein, shall pay any applicable charges, penalties, surcharges, fees, taxes, assessments and/or direct

billed amounts provided for in MRT's tariff. In any event, the rate in any month shall never be below

MRT's applicable minimum tariff rate for a discount rate transaction. For a Negotiated Rate

transaction, the rate in any month shall never be below MRT's applicable minimum tariff rate, unless

MRT otherwise agrees. MRT shall not be responsible for the payment and satisfaction of any taxes

assessed or levied on the receipt, transmission (and any activities in connection therewith), delivery,

use and/or consumption with respect to gas delivered or received by Customer, unless MRT agrees

otherwise.

(b) Inability to Collect Negotiated Rates: If this Exhibit A covers a Negotiated Rate transaction, and MRT

is unable to collect Negotiated Rates due to a change in Commission policy or rejection of the

transaction by the Commission prior to or during the term of such transaction, then, unless the parties

agree otherwise, Customer shall pay the maximum tariff rate for the services. In such event, MRT shall

notify Customer in writing of the requirement to pay maximum tariff rates and, if the maximum tariff

rates are greater than the Negotiated Rates under such transaction, Customer shall have no more than

thirty (30) days from the date of such notification to give notice in writing of termination of the

applicable Agreement, with such termination to be effective no earlier than the end of the month

following the month in which such termination notice is received.

[Describe terms of discounted or Negotiated Rate as permitted by the tariff and applicable Commission

policy and precedent.]