Sewerage Act Article 7

The public sewerage shall be constructed and managed by local government or country/town/village office(s), provided that, when deemed necessary, the competent authorities may appoint a relevant public enterprise to construct and manage the public sewer.
中文原文 下水道法第7條
公共下水道,由地方政府或鄉(鎮、市)公所建設及管理。
但必要時,主管機關得指定有關之公營事業機構建設、管理之。

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