Urban Planning Act Article 73

Public housing projects shall be formulated and executed in coordination with the urban renewal plans implemented by special municipality or county/city governments or township, or county-administered city offices. All public housing projects shall include a certain percentage of affordable homes to be sold or rented to residents to be resettled in implementation of renewal plans.
中文原文 都市計畫法第73條
國民住宅興建計畫與當地直轄市、縣(市)政府或鄉、鎮、縣轄市公所實施之舊市區更新計畫力求配合;國民住宅年度興建計畫中,對於廉價住宅之興建,應規定適當之比率,並優先租售與舊市區更新地區範圍內應予徙置之居民。

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