The Enforcement Rules of Disaster Prevention and Protection Act Article 3

Public utilities mentioned in the Act refer to mass communication, electricity enterprise, water supply enterprise, telecommunications enterprise, natural gas, petroleum, transportation and other industries designated by the central regulating authorities.
中文原文 災害防救法施行細則第3條
本法所稱公共事業,指經中央目的事業主管機關指定之大眾傳播事業、電業、自來水事業、電信事業、天然氣事業、石油業、運輸業及其他事業。

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