Water Act Article 18-1

The priority of water supply from a multiple-purpose reservoir shall be set according to the plan approved by the authority-in-charge, unless the right holders have agreed otherwise, provided that such an agreement has been submitted to and approved by the authority-in-charge.
中文原文 水利法第18-1條
多目標水庫用水標的之順序,依主管機關核准之計畫定之。
但各標的權利人另有協議,並報經主管機關核定者,從其協議。

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