Southwest Gas Storage Company

First Revised Volume No. 1

Effective Date: 08/01/2009, Docket: RP09-730-000, Status: Effective

Ninth Revised Sheet No. 147 Ninth Revised Sheet No. 147

Superseding: Eighth Revised Sheet No. 147

GENERAL TERMS AND CONDITIONS

(Continued)

18. MISCELLANEOUS (Continued)

18.5 Southwest has adopted all of the Business Practices and Electronic

Communication Standards which are incorporated in 18 CFR

§284.12(a). Notwithstanding this Section 18.5, Southwest shall

adhere to the NAESB standards as modified by Order No. 717. In

addition to the standards which are reflected in other provisions

of this Tariff, the following NAESB standards, definitions and data

sets are incorporated herein by reference.

Version 1.8, September 30, 2006: 0.2.1 through 0.2.3, 0.3.1 through

0.3.15, 0.4.1, 1.2.1 through 1.2.3, 1.2.5, 1.2.8 through 1.2.19,

1.3.2(vi), 1.3.3, 1.3.4, 1.3.6, 1.3.13 through 1.3.18, 1.3.20

through 1.3.29, 1.3.31 through 1.3.33, 1.3.35 through 1.3.77,

1.3.79, 1.4.1 through 1.4.7, 2.2.1 through 2.2.5, 2.3.1 through

2.3.13, 2.3.15 through 2.3.23, 2.3.25, 2.3.27, 2.3.28 through

2.3.35, 2.3.51 through 2.3.65, 2.4.1 through 2.4.18, 3.3.1 through

3.3.8, 3.3.10 through 3.3.14, 3.3.16 through 3.3.26, 3.4.1 through

3.4.4, 4.2.1 through 4.2.20, 4.3.1 through 4.3.3, 4.3.5, 4.3.16

through 4.3.18, 4.3.20, 4.3.22 through 4.3.36, 4.3.38 through

4.3.62, 4.3.65 through 4.3.69, 4.3.72 through 4.3.76, 4.3.78

through 4.3.87, 4.3.89 through 4.3.93, 5.2.1 through 5.2.3, 5.3.7,

5.3.12, 5.3.17 through 5.3.25, 5.3.27 through 5.3.60, 5.4.1 through

5.4.23, 10.2.1 through 10.2.38, 10.3.1 and 10.3.3 through 10.3.25.

18.6 Southwest may, from time to time, enter into agreements with other

interstate or intrastate pipeline companies for capacity (off-

system capacity). In the event that Southwest acquires off-system

capacity, Southwest will provide service to Shippers with the off-

system capacity pursuant to Southwest's open access tariff and

subject To Southwest's Commission-approved rates, as such tariff

and rates may change from time to time. For purposes of

transactions entered into subject to this Section 18.6, the

"shipper must have title" requirement is waived.