Irrigation Act Article 12

Farmland water conservancy facilities shall not be concurrently used for other purposes. However, if the proposed alternate use does not interfere with the original functions or maintenance of the facilities, applicants can apply authorization from the Competent Authority by submitting a plan for concurrent use.Regulations governing concurrent other uses as mentioned in the preceding Paragraph, their application procedures, the required contents of plans, documents that shall be attached, conditions for authorization, withdrawal of authorization, and other relevant matters shall be stipulated by the Competent Authority.
中文原文 農田水利法第12條
農田水利設施不得兼作其他使用。
但不妨礙原有功能運作及維護者,申請人得檢附計畫書,向主管機關申請許可,兼作其他使用。
前項之兼作使用項目、申請程序、計畫書應記載內容、應檢附文件、許可條件、廢止許可及其他相關事項之辦法,由主管機關定之。

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