Water Act Article 11

For undertaking any hydraulic engineering project, the authority-in-charge at various levels may recruit workers from those who benefit from the project, provided that a recruitment plan has been approved by its superior authority and filed with the central authority-in-charge.
中文原文 水利法第11條
各級主管機關為辦理水利工程,得向受益人徵工;其辦法應報經上級主管機關核准,並報中央主管機關。

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