Natural Gas Enterprise Act Article 37

Natural gas utility enterprises shall maintain a normal gas supply throughout the day. Except for force majeure or emergency, if the need arises to suspend gas supply to all or part of the gas supply areas for more than 8 hours, the natural gas utility enterprise shall obtain prior approval from the competent authority of the municipality or county (city) and notify users 3 days before the suspension. If the suspension of gas supply exceeds 7 days, the enterprise shall obtain approval from the competent authority of the municipality or county (city) and the said competent authority shall subsequently notify the central competent authority for reference.If the supply of gas is suspended due to force majeure or emergency, as stated in the preceding paragraph, the natural gas utility enterprise shall report to the competent authority of the municipality or county (city) for reference within 3 days from the occurrence of the force majeure or emergency.
中文原文 天然氣事業法第37條
公用天然氣事業應維持全日正常供氣,除不可抗力或緊急事故外,遇有供氣區域內全部或一部停止供氣逾八小時之必要者,應先報請直轄市、縣(市)主管機關核准,並於停止供氣三日前通知用戶;停止供氣逾七日者,應報經直轄市、縣(市)主管機關核准,並轉請中央主管機關備查。
前項因不可抗力或緊急事故原因而停止供氣者,應自事實發生之日起三日內,報請直轄市、縣(市)主管機關備查。

English translation for reference only; the Chinese text prevails. Not legal advice.