Tuscarora Gas Transmission Company

Original Volume No. 1

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Effective Date: 01/20/2004, Docket: RP00-487-003, Status: Effective

Third Revised Sheet No. 48A Third Revised Sheet No. 48A : Effective

Superseding: First Revised Sheet No. 48A

GENERAL TERMS AND CONDITIONS

6.7 Imbalance Trading. Tuscarora will allow Shippers to trade

cumulative Daily System Imbalances that are offsetting such that

the cumulative Daily System Imbalance for each Shipper would be

reduced to a quantity closer to zero

(a) Authorizations to Post Imbalances that are received by the

Transportation Service Provider by 11:45 a.m. (9:45 a.m. PCT)

should be effective by 8:00 a.m. (6:00 a.m. PCT) the next

business day (central clock time). Imbalances previously

authorized for posting should be posted on or before the ninth

business day of the month.

(b) Transportation Service Providers should provide the ability to

post and trade imbalances until at least the close of the

seventeenth business day of the month.

(c) Transportation Service Providers should provide the ability to

view and, upon request, download posted imbalances.

(d) Imbalances to be posted for trading should be authorized by the

Service Requester.

(e) Transportation Service Providers should not be required to post

zero imbalances.

(f) When trading imbalances, a quantity should be specified.

(g) Transportation Service Providers should enable the imbalance

trading process by:

- Receiving the Request for Imbalance Trade,

- Receiving the Imbalance Trade Confirmation,

- Sending the Imbalance Trade Notification, and

- Reflecting the trade prior to or on the next monthly Shipper

Imbalance or cashout.