Each gas utility shall keep a record of any condition resulting in any interruption of service affecting its entire system or major division thereof, or any major community or any important division, consisting of at least fifty customers, of a community, including a statement of the time, duration and cause of such interruption. The commission and ORS are to be notified by telephone of any such interruption as soon as practicable after it comes to the attention of the gas utility and a complete written report made to the commission and ORS after restoration of service, if such interruption is more than six hours in duration.
S.C. Code Regs. § 103-414