Water Act Article 54

When the central authority-in-charge deems it necessary to upscale a water work or expand its benefits, it may, without consent of any involved agencies or entities, order its proprietor to reserve room for such upscale or add fundamental facilities, and raise and advance funds therefor.
中文原文 水利法第54條
中央主管機關認為興辦之水利事業有擴大開發之必要或增加使用目標之利益時,得不經該目標有關機關團體之同意,令由興辦水利事業人預留擴充地位或增添初步設備,並籌墊其經費。

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