Southwest Gas Storage Company

First Revised Volume No. 1

Effective Date: 10/01/2007, Docket: RP07-684-000, Status: Effective

Second Revised Sheet No. 216 Second Revised Sheet No. 216 : Effective

Superseding: First Revised Sheet No. 216

FORM OF AGREEMENT

FOR MESSENGER

(Continued)

Other Terms and Conditions

Use of the Messenger system is expressly subject to all of the

General Terms and Conditions, as well as all of the terms and conditions

of any Rate Schedule and Service Agreement which may be applicable to any

transaction performed by Messenger Subscriber and Pipeline by means of

the Messenger system, all of which are set forth in Pipeline's currently

effective FERC Gas Tariff as amended from time to time and are hereby

incorporated by reference. In the event of a conflict between the terms

and conditions of this agreement and any other applicable terms and

conditions set forth in Pipeline's currently effective FERC Gas Tariff

which are incorporated by reference herein, such other terms and

conditions shall govern Messenger Subscriber's use of the Messenger

system unless otherwise specifically provided herein.

ARTICLE III

TERM

This agreement shall be and continue in full force and effect from

the date of execution hereof until terminated only for due cause or at

Messenger Subscriber's request. Messenger Subscriber agrees that

Pipeline shall have the unilateral right to file with the appropriate

regulatory authority and make changes effective in any provision of the

General Terms and Conditions applicable to this agreement. Pipeline

agrees that Messenger Subscriber may protest or contest the

aforementioned filings, and Messenger Subscriber does not waive any

rights it may have with respect to such filings.