65-407-320 Me. Code R. § 5
In the event of a Sustained Interruption, each T&D Utility shall employ reasonable utility practices to restore service in a timely manner, consistent with appropriate consideration of safety and costs.
In the event of a Sustained Interruption affecting more than 500 customers or 1% of a T&D Utility's customers, whichever is greater, the T&D Utility shall provide immediate notification to the Commission. The notification shall include the date and time of the Sustained Interruption; the number of Customers affected in each service center or county, and town; the cause of the Sustained Interruption; and any other information descriptive of or relevant to the event. The T&D Utility shall provide periodic updates no less frequently than daily for the duration of the Sustained Interruption. This reporting requirement does not apply to Momentary Interruptions.
For each Major Outage Event, each Investor-Owned T&D Utility shall calculate the percentage of customers that experience one or more Sustained Interruptions in each hour of the event. The utility shall quarterly provide to the Commission a graph for each Major Outage Event showing the number of customers experiencing one or more Sustained Interruptions for every hour of the event. The Commission may ask utilities to provide reports that support the reasonableness of its restoration response for Major Outage Events.
65-407 C.M.R. ch. 320, § 5