Enforcement Rules of Animal Industry Act Article 3

The land stipulated in Article 5, Paragraph 2 of the Act shall be located in the zoning that allows the establishment of livestock/poultry farming operation, including the land that has been used legally for such purpose before the zoning code is implemented, and the land that does not comply with the zoning code after it goes into effect, but later on brings itself up to code before being ordered by the concerned competent authorities to change its use or demolish structures situated on the land.
中文原文 畜牧法施行細則第3條
本法第五條第二款所定土地應屬依法可作畜牧設施使用者,包括土地使用分區編定前,原已依法作畜牧設施使用之土地,於使用分區編定後不合土地使用分區編定,各相關主管機關命其變更使用或拆除建築物前之土地。

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