Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

Effective Date: 04/16/2008, Docket: RP08-274-000, Status: Effective

Second Revised Sheet No. 127 Second Revised Sheet No. 127 : Effective

Superseding: First Revised Sheet No. 127

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

18. OPERATING PROVISIONS (Continued)

18.1 Firm Service (Continued)

For capacity that becomes available other than through the

circumstances identified in Paragraphs 28 and 33, requests for firm

capacity shall be accommodated in the following manner and subject to

the following conditions and limitations:

(a) In order to be eligible for firm capacity, a party requesting

service (requestor) must be deemed credit-worthy per Paragraph

18.3 and submit a valid request in accordance with the

provisions herein.

(b) Future Sales of Capacity: GTN may sell firm capacity with

service commencement dates more than one year in the future,

when such capacity is either available unsubscribed capacity or

capacity that will become available and is not subject to a

right of first refusal or unilateral evergreen provision, by

either conducting an open season or by selling such capacity on

a pre-arranged basis.

If GTN conducts an open season, it will post notice of the open

season on its Internet website for at least five (5) business

days to afford all potential shippers an opportunity to acquire

the capacity. Any potential shippers wishing to acquire

capacity may request an immediate or future commencement date

(if the capacity is currently available) or a future

commencement date (if the capacity will become available in the

future). GTN will award capacity on an NPV basis consistent

with Paragraph 18.1(e) of these General Terms and Conditions.

If GTN sells capacity on a pre-arranged basis, GTN will post

the terms of the pre-arranged transaction and other parties

will have an opportunity to bid on the capacity. At the time

GTN enters into a pre-arranged service agreement, GTN will post

a notice on its Internet website indicating that the pre-

arranged capacity will be subject to an open bidding process

within three (3) business days, even if such capacity has

already been subject to an open season bidding process and is

currently posted as available capacity. If another party

submits a bid with a higher incremental economic value, the

pre-arranged Shipper will have a one-time right to match the

higher bid in order to retain the capacity. If the

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