Each electrical 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 an important division of such a community, including a statement of the time, duration, and cause of any such interruption. The commission and the ORS are to be notified of any such interruptions as soon as practicable after it comes to the attention of the utility and a complete report made to the commission and the ORS after restoration of service if such interruption is for more than six hours duration.
S.C. Code Regs. § 103-314