Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

Effective Date: 01/01/2007, Docket: RP06-407-000, Status: Effective

First Revised Sheet No. 140 First Revised Sheet No. 140 : Effective

Superseding: Original Sheet No. 140

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

18. OPERATING PROVISIONS (Continued)

18.3 Creditworthiness (Continued)

(D) Creditworthiness for Interruptible Transportation Service

(Continued)

(3) (Continued)

(e) Any other security mutually agreed upon by Shipper and

GTN. Such other security shall be accepted on a

nondiscriminatory basis.

(4) Within five (5) business days of a Shipper notifying GTN

either in writing or by fax that it has returned to

creditworthiness consistent with Paragraph 18.3(D)(1)(a) or

18.3(D)(1)(c) herein, and provided that Shipper's credit

limit is adequate to cover its contractual obligations, GTN

will return, with any applicable interest, Shipper's

security held by GTN along with reconciliations of interest

calculations.

Upon the expiration of Shipper's Agreement(s), GTN will

return, with any applicable interest, Shipper's security

associated with undisputed invoice amounts within five (5)

business days of Shipper paying its final invoice. Any

remaining security will be returned with interest after

resolving any and all disputed invoice amounts under the

expired Agreement(s). GTN will provide Shipper with final

billing reconciliations detailing interest calculations.

(E) Creditworthiness for Parking and Lending Services

The standards for Interruptible Transportation Service apply

to parking and lending service under GTN Rate Schedules PS-1

and AIS-1, respectively. For lending service, however, the

security requirement under the cash and Letter of Credit

options includes an amount to adequately account for the value

of the gas being lent. The amount of security necessary to

collateralize lent gas will be up to Shipper's maximum

quantity times the average annual "Malin" price, as reported

in Gas Daily's Daily Price Survey, for the preceding calendar

year ended October 31. GTN shall have no obligation to lend

any quantity of gas beyond amounts for which GTN holds

security.