Water Act Article 78-4

The central authority-in-charge will set forth regulations governing the zoning, approval and public announcement of drainage and catchment area, maintenance of drainage facilities, flood control and flooding emergency, safety inspection, usage management of drainage facilities, and other provisions. However the drainage systems of farmland, cities, and enterprises will be administered by authorities in charge of relevant industries according to the established regulations.
中文原文 水利法第78-4條
排水集水區域之劃定與核定公告、排水設施管理之維護管理、防洪搶險、安全檢查、設施範圍之使用管理及其他應遵行事項,由中央主管機關訂定排水管理辦法管理之。
但農田、市區及事業排水,由目的事業主管機關依其法令管理之。

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