Parking Facility Act Article 22

Private owned buildings with built-in parking facilities can open for public use by paying toll.Except for its own business requirement, public buildings with built-in parking facilities can open for public use by paying toll.
中文原文 停車場法第22條
私有建築物附設之停車空間,得供公眾收費停車使用。
公有建築物,應附設停車空間,得於業務需要之外,開放供公眾收費停車使用。

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