Land Act Article 160

The value of land may be re-assessed after the lapse of five full years since its declaration, or after the lapse of one full year since its declaration if the land value fluctuates by more than 50 per cent either above or below the standard land value; and the provisions of Articles 150 to 152 inclusive and of Article 154 to 156 inclusive shall apply in such re-assessment.
中文原文 土地法第160條
地價申報滿五年,或一年屆滿而地價已較原標準地價有百分五十以上之增減時,得重新規定地價,適用第一百五十條至第一百五十二條及第一百五十四條至第一百五十六條之規定。

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