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. 152 Third Revised Sheet No. 152

Superseding: Second Revised Sheet No. 152

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

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

19.4 Nominations (Continued)

19.4(c) Changes to Nominations

(1) Changes to Standing Nominations

In accordance with NAESB Standard 1.3.7, Version 1.8, all

nominations should be considered original nominations and

should be replaced to be changed. When a nomination for a

date range is received, each day within that range is

considered an original nomination. When a subsequent

nomination is received for one or more days within that

range, the previous nomination is superseded by the

subsequent nomination only to the extent of the days

specified. The days of the previous nomination outside the

range of the subsequent nomination are unaffected.

Nominations have a prospective effect only. A nomination

for a period within the start and end dates of a Standing

Nomination replaces the Standing Nomination for the

specific gas day(s) only and does not replace the remainder

of the Standing Nomination.

(Continued)