The Electricity Act Article 55
In the event that the Public Electricity-Retailing Utility is forced to cut power to all or part of its users due to circumstances allowing for no other choice, the power cut shall be reported to the competent authority at the level of the Municipal Government or County (City) Government for approval and publicly announced in advance, unless the interruption occurs owing to an unexpected failure, in which case the report may be filed later. The competent authority at the level of the Municipal Government or County (City) Government shall report the power cut to the Electricity Industry Regulatory Agency for approval if the power cut lasts more than 15 days.
中文原文 電業法第55條
公用售電業因不得已事故擬對全部或一部用戶停電時，除臨時發生障礙，得事後補行報告外，應報請直轄市或縣（市）主管機關核准並公告之；其逾十五日者，直轄市或縣（市）主管機關應轉報電業管制機關核准。