Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 01/01/2007, Docket: RP06-407-008, Status: Pending

Substitute Original Sheet No. 134A Substitute Original Sheet No. 134A : Pending

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

18. OPERATING PROVISIONS (Continued)

18.3 Creditworthiness (Continued)

(A) Creditworthiness for Firm Transportation Service (Continued)

(2)(b) (Continued)

(i) Guarantee: Shipper may obtain a guarantee of

financial performance in a form satisfactory to GTN

and for the term of the Gas Transportation

Agreement from a corporate affiliate of the Shipper

or a third party, either of which meets the

creditworthiness standard discussed above. For

these Shippers, the credit limit will be based upon

the financials of the guarantor. A form of

guarantee is available on GTN's Internet website.

If during the term of service the guarantor does

not meet the creditworthiness standards discussed

above, then GTN may request additional credit

assurances as described in (i) through (iv) below

if GTN agrees to release the original guarantor of

all obligations at the time Shipper provides the

additional assurances.

(Continued)