Urban Planning Act Article 70

Agencies or institutions in charge of renewal plans may surrender or put up for sale the sites where buildings have been dismantled for reconstruction and cleared up. Successors shall rebuild according to the time frame set forth in the renewal plan. The competent authority shall repossess the land at the original selling price from those failing to comply and conduct the reconstruction or sell the site to a different party.
中文原文 都市計畫法第70條
辦理更新計畫之機關或機構得將重建或整建地區內拆除整理後之基地讓售或標售。
其承受人應依照更新計畫期限實施重建;其不依規定期限實施重建者,應按原售價收回其土地自行辦理,或另行出售。

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