Transwestern Pipeline Company, LLC

Third Revised Volume No. 1

Effective Date: 10/23/2006, Docket: RP06-604-000, Status: Effective

Second Revised Sheet No. 135 Second Revised Sheet No. 135 : Effective

Superseding: First Revised Sheet No. 135

GENERAL TERMS AND CONDITIONS

(continued)

21. GAS RESEARCH INSTITUTE (GRI) VOLUNTARY CONTRIBUTION MECHANISM

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21.1 Purpose

Gas Research Institute (GRI), an Illinois not for profit corporation, has been

organized for the purpose of sponsoring Research, Development and Demonstration (RD&D)

programs in the field of natural and manufactured gas for the purpose of assisting all

segments of the gas industry in providing adequate, reliable, safe, economic and

environmentally acceptable gas service for the benefit of gas consumers and the

general public.

21.2 Voluntary Contribution Mechanism.

For the purpose of funding GRI's endeavors, Shippers may voluntarily choose to

contribute to GRI programs through a "check-the-box" mechanism on Shipper invoices.

The "check-the-box" mechanism will permit Shippers to specify the level of

contribution and the project(s) or project area(s) to be funded at the time of the

Shipper's contribution payment. Transporter shall serve as voluntary collection

agent for such collections and amounts collected pursuant to the "check-the-box"

mechanism will not be considered part of pipeline rates.

21.3 Remittance to GRI

Transporter shall remit to GRI, not later than fifteen (15) days after the

receipt thereof, all monies received by virtue of the Voluntary Contribution

Mechanism, less any amounts properly payable to a Federal, State or Local authority

relating to the monies received hereunder. Transporter shall indicate to the GRI the

amounts applicable to specified project(s) and project area(s), if so indicated by

Shipper(s).

21.4 Payment by Shipper

Shipper's voluntary GRI contribution shall be due and payable with the bill for the

month Shipper has chosen to contribute.