Trunkline Gas Company, LLC

Third Revised Volume No. 1

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Effective Date: 05/17/2009, Docket: RP09-519-000, Status: Effective

Third Revised Sheet No. 512 Third Revised Sheet No. 512

Superseding: Second Revised Sheet No. 512

FORM OF AGREEMENT

FOR MESSENGER®

This agreement, executed this _____ day of ____________________,

____, by and between _____________________________________ ("Messenger®

Subscriber"), and Panhandle Eastern Pipe Line Company, LP, Trunkline

Gas Company, LLC, Sea Robin Pipeline Company, LLC, Trunkline LNG

Company, LLC and Southwest Gas Storage Company ("Pipeline"), witnesseth

that for and in consideration of the mutual covenants and provisions

herein contained and subject to all of the terms, provisions and

conditions herein set forth, Messenger® Subscriber and Pipeline do

hereby agree as follows:

ARTICLE I

SCOPE OF AGREEMENT

Pipeline shall make available for use by Messenger® Subscriber

Pipeline's computerized electronic communication service, the Messenger®

system. Messenger® Subscriber may at its option use the Messenger®

system to: (1) execute a contract for new service under applicable Rate

Schedules; (2) execute an amendment of an existing Service Agreement;

and (3) nominate quantities for receipt and delivery by Pipeline

pursuant to an existing Service Agreement under any of Pipeline's Rate

Schedules. Messenger® Subscriber may also use the Messenger® system to

request and receive from Pipeline such other information as Pipeline may

from time to time make available to Messenger® Subscriber through the

Messenger® system.

ARTICLE II

TERMS AND CONDITIONS

Messenger® Subscriber's use of the Messenger® System shall be in

accordance with and subject to Pipeline's currently effective FERC Gas

Tariff, including any and all applicable provisions of the General Terms

and Conditions (the "General Terms and Conditions") and the terms and

conditions of any relevant Rate Schedules which appear in Pipeline's

currently effective FERC Gas Tariff, all of which terms and conditions

are expressly incorporated by reference herein.