Act for Promotion of Private Participation in Infrastructure Projects Article 20

The use period for the land, of which the ownership or the superficies is expropriated in accordance with Articles 16 and 18 hereof, shall be determined in accordance with the deadline approved for the project concerned. In case the authority in charge fails to use the land in accordance with the deadline approved for the project concerned, the original land owners may, within five (5) years from the day following the expiration of the deadline approved for the project concerned, apply with the relevant municipal or county (city) governments to purchase back the land previously expropriated at the original expropriation price.
中文原文 促進民間參與公共建設法第20條
依第十六條及第十八條規定徵收之土地所有權或地上權,其使用期限應依照核准之計畫期限辦理。
未依核准計畫期限使用者,原土地所有權人得於核准計畫期限屆滿之次日起五年內,向該管直轄市或縣(市)地政機關申請照原徵收價額收回其土地。

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