Southern Natural Gas Company

Seventh Revised Volume No. 1

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Effective Date: 01/01/2001, Docket: RP00-514-000, Status: Effective

Original Sheet No. 151A Original Sheet No. 151A : Effective

GENERAL TERMS AND CONDITIONS

(Continued)

(b) Based on an evaluation of current and forecasted system conditions, COMPANY

shall post by 1:00 p.m. (CCT) each gas day the operating condition for the

current gas day and the projected operating conditions for the succeeding

two gas days. Such operating conditions will be posted to be Normal, Alert,

Critical, or Emergency Mode. The operating conditions may be different

for Delivery Points within the various geographic areas of Company's System.

Normal Mode shall be implemented when system conditions do not warrant a

correction in flow, and when no known threat to system conditions exists.

Alert Mode shall be implemented when system conditions warrant a correction

in flow, or when a threat to system conditions exists. Critical Mode shall be

implemented when system conditions warrant a prompt correction in flow or when

an imminent threat to system conditions exists. Emergency Mode shall

be implemented when system conditions warrant an immediate correction to flow

or when an event has occurred or is occurring that jeopardizes system conditions.