Water Act Article 13

Beneficiaries of a government’s water work who directly pay for the work may apply to the authority-in-charge for approval to organize a water conservation promotion association.
中文原文 水利法第13條
政府興辦水利事業,受益人直接負擔經費者,得申請主管機關核准設立水利協進會。

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