Great Lakes Gas Transmission Limited Partner

Second Revised Volume No. 1

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Effective Date: 02/01/2010, Docket: RP10-253-000, Status: Effective

Second Revised Sheet No. 13B Second Revised Sheet No. 13B

Superseding: Substitute First Revised Sheet No. 13B

GENERAL TERMS AND CONDITIONS

(continued)

3.9 Imbalance Netting and Trading

(A) Operational Impact Area

An Operational Impact Area is the largest possible area on Transporter's system in which

imbalances have a similar operational effect and within which Shippers can net or trade

imbalances. On Transporter's system there is one (1) Operational Impact Area consisting of

the Western, Central, and Eastern rate zones. Shippers on Transporter's system may net or

trade imbalances within and across all three (3) rate zones.

(B) Imbalance Netting

(1) At the end of each Month, Transporter shall net all of a Shipper's imbalances within each

rate zone on and across its Service Agreements to provide the Shipper with the lowest

possible net imbalance or to accumulate imbalances within each rate zone to facilitate the

trading of imbalances with other Shippers. Transporter will first net imbalances among a

Shipper's Agreements under the same Rate Schedule and then will net imbalances across the

Shipper's Service Agreements under all Rate Schedules.

(2) In the event that Shipper desires to net imbalances across rate zones, Shipper shall be

subject to the applicable charges and fees for Transportation Service across the rate zones

only if any such charges and fees for the service have not already been paid. Any such

Transportation Service necessary to effectuate imbalance netting across rate zones shall be

administered under the Transportation Service Agreement of the Shipper's choosing. Shipper

must notify Transporter of its desire to net imbalances across rate zones under the

Transportation Service Agreement chosen by the Shipper.

(C) Imbalance Trading

(1) Posting of Imbalances for Trade

(a) A Shipper may notify Transporter either electronically or in writing that it wishes

its imbalance(s) to be posted on Transporter's Web Site as being available for

trading. Shipper shall communicate to Transporter: the quantity available for

trading; the point or zone where the imbalance is located; a contact name, phone

number, and e-mail address; and any special conditions. Authorization to post

imbalances received by Transporter by 11:45 a.m. (CCT) shall be posted by 8:00 a.m.

(CCT) on the following business day.

(b) A Shipper may also notify Transporter to automatically post its imbalances on the Web

Site. In its notice Shipper shall communicate to Transporter a contact name, phone

number, and e-mail address and any special conditions. Such imbalances shall be

posted to Transporter's Web Site concurrently with the daily issuance of imbalance

statements. Such postings will reflect actual imbalance data. Transporter shall

continue to post imbalances for trading until subsequent notice is provided to

Transporter by Shipper to discontinue such posting.

(2) Trading of Imbalances

(a) After a trade has been negotiated by or among Shippers, one Shipper (the Initiating

Trader) shall notify Transporter either electronically or in writing of its request to

trade imbalances with another Shipper (the Confirming Trader). The Initiating Trader

must also communicate to Transporter: the parties to the trade; contact names, phone

numbers, and e-mail addresses; the imbalance quantity to be traded; and the locations

of the imbalances to be traded.

(b) Before Transporter shall facilitate the imbalance trade, the Confirming Trader must

verify the terms of the trade and notify Transporter in writing of its acceptance of

such terms.

(c) In the event that the Shippers desire to trade imbalances across rate zones, the

Initiating Trader shall be subject to the applicable transportation charges and fees

for Transportation Service across the rate zones only if any such charges and fees for

the service have not already been paid. Any such Transportation Service necessary to

effectuate imbalance trading across rate zones shall be administered under the

Transportation Service Agreement of the Shippers' choosing.