Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 08/01/2009, Docket: RP09-684-000, Status: Effective

Third Revised Sheet No. 145 Third Revised Sheet No. 145

Superseding: Second Revised Sheet No. 145

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

19. PRIORITY OF SERVICE, SCHEDULING AND NOMINATIONS (Continued)

19.3 Priority of Authorized Overrun Service

Authorized overrun service shall have a priority lower than firm or

interruptible as defined above. Priority within the overrun class

shall be determined using a first-come, first-serve procedure.

19.4 Nominations

19.4(a) Information to be Provided with Nomination

A Shipper may nominate for transportation service on GTN

electronically in accordance with Section 34 of the General

Terms and Conditions of this Tariff. In accordance with NAESB

Standard 1.3.5, Version 1.8, all nominations should include

Shipper-defined begin dates and end dates. All nominations

excluding intraday nominations should have roll-over options.

Specifically, Shippers should have the ability to nominate for

several days, months, or years, provided the nomination begin

and end dates are within the term of Shipper's contract.

All nominations shall include, at a minimum:

a daily quantity of gas to be transported (expressed in

Dekatherms);

previously approved and valid receipt and delivery points; and

shipper defined begin dates and end dates.

(Continued)