Sewerage Act Article 18

The operation and maintenance of the sewerage facilities shall be conducted by qualified personnel who pass the skills certification. The skills certification shall be regulated by the central competent authority.
中文原文 下水道法第18條
下水道設施之操作、維護,應由技能檢定合格人員擔任之。
其技能檢定辦法,由中央主管機關定之。

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