Southwest Gas Storage Company

First Revised Volume No. 1

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

Second Revised Sheet No. 214 Second Revised Sheet No. 214 : Effective

Superseding: First Revised Sheet No. 214

FORM OF AGREEMENT

FOR MESSENGER

(Continued)

Messenger Subscriber shall not disclose to persons other than

Authorized Personnel, and shall otherwise keep completely confidential,

all USERIDs and passwords issued to Messenger Subscriber by Pipeline. In

addition, each Authorized Personnel shall likewise not disclose to any

other person, and shall otherwise keep completely confidential, the

individualized USERID and password issued to such Authorized Personnel.

Messenger Subscriber shall immediately inform Pipeline in writing

whenever Messenger Subscriber desires to terminate access to the

Messenger system previously granted to any Authorized Personnel, or

desires to terminate the status of any Designated Personnel. Messenger

Subscriber shall be solely responsible for any and all unauthorized or

otherwise improper use of USERIDs and passwords issued to Messenger

Subscriber by Pipeline, including but not limited to the use of such

USERIDs and passwords by Authorized Personnel who at some point are no

longer within Messenger Subscriber's employment or control. Pipeline

reserves the right, at any time and in Pipeline's sole discretion, to

invalidate without prior notice any password or USERID issued to

Messenger Subscriber.

Messenger Subscriber shall defend and indemnify Pipeline from and

against any and all claims, demands, and actions, and any resulting loss,

costs, damages, and expenses (including court costs and reasonable

attorney's fees) of any nature whatsoever, which may be asserted against

or imposed upon Pipeline by any party as a result of the unauthorized or

otherwise improper use of any USERID or password issued by Pipeline to

Messenger Subscriber.