Water Supply Act Article 69

Where it is necessary for a water supply enterprise to look into and handle cases of water theft or illegal use of water, it may proceed according to the provisions pursuant to Article 68 and request the assistance of local military police or police at any time.
中文原文 自來水法第69條
自來水事業對竊水或違章用水,須實施檢查及處理時,除得依前條規定辦理外,並得隨時報請所在地憲警機關協助辦理。

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