Land Tax Act Article 42

The competent tax authority shall, at least sixty days before the commencement of the annual land value tax collection, publicly announce the relevant provisions and application procedures for the imposition of the land value tax at a special tax rates pursuant to Articles 17 and 18.
中文原文 土地稅法第42條
主管稽徵機關應於每年地價稅開徵六十日前,將第十七條及第十八條適用特別稅率課徵地價稅之有關規定及其申請手續公告週知。

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