Land Act Article 191

Public lands and public constructional improvements shall be exempted from the land tax and the tax on improvements, unless they are used by government enterprises or are not used for public purposes.
中文原文 土地法第191條
公有土地及公有建築改良物,免征土地稅及改良物稅。
但供公營事業使用或不作公共使用者,不在此限。

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