Water Supply Act Article 93-1

A water pipe installation contractors shall hang its registration certificate at a conspicuous spot in its office and the work manual issued shall only be used for verification by engineering units.The material used by water pipe installation contractors shall meet appropriate and applicable standards.The municipal or county (city) government at where the water pipe installation contractor is registered will issue warning if the contractor violates the provisions in Paragraph 1 and Paragraph 2 herein.
中文原文 自來水法第93-1條
自來水管承裝商登記證應懸掛於營業處所明顯易見之處,所領承辦工程手冊專供工程單位驗證之需。
自來水管承裝商承辦工程所用之材料,其規格應符合規定。
自來水管承裝商違反前二項規定者,原登記直轄市或縣(市)政府應予警告處分。

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