Centerpoint Energy - Mississippi River

Third Revised Volume No. 1

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Effective Date: 01/19/2005, Docket: RP05-129-000, Status: Effective

Third Revised Sheet No. 149A Third Revised Sheet No. 149A : Effective

Superseding: Second Revised Sheet No. 149A

GENERAL TERMS AND CONDITIONS

(Continued)

10. TRANSPORTATION BALANCING (Continued)

(c) (i) To consummate a gas trade, whether resulting from

an imbalance posting or otherwise, one of the Customers agreeing

to trade must telecopy or e-mail to MRT in the form prescribed by

MRT, a request for imbalance trade providing such Customer's (the

initiating trader) name, and contact person's name, and telephone

numbers and e-mail addresses, the name of the other Customer who

is a party to the trade, the month and year the imbalances were

incurred, imbalance type for each party to the trade, the zone in

which the imbalances were incurred, the imbalance quantity to be

traded and such other information as MRT may require.

Additionally, the confirming trader shall transmit an imbalance

trade confirmation to MRT via telecopy or e-mail, in the form

prescribed by MRT, indicating whether such party accepts or

declines the imbalance trade. Upon thirty (30) days notice via

posting on MRT's Internet web site, MRT may require requests for

imbalance trade and imbalance trade confirmations to be provided

electronically via the Internet.

(ii) If MRT receives an imbalance trade confirmation

prior to 11:45 a.m. on a business day, MRT will send an imbalance

trade notification to the initiating trader and confirming trader

no later than noon on the next business day. Upon thirty (30)

days' notice via posting on MRT's Internet web site, MRT may begin

providing imbalance trade notifications electronically via the

Internet. MRT will only approve trades which will not harm MRT

operationally or financially. MRT will indicate its approval or

rejection on the imbalance trade notification provided to the

parties involved. MRT will then transfer the receipt quantities

traded between the appropriate Customers.

(iii) Imbalance trades can only be withdrawn by the

initiating trader and only prior to the confirming trader's

confirmation of the trade. Imbalance trades are considered final

when confirmed by the confirming trader and effectuated by MRT.

Imbalance trades will be reflected on the cash-out invoice next

following such trade.