New Town Development Act Article 20

Where a building base in a new town special area doesn't reach the minimum area of building base prescribed in the plan of the new town special area, building permit will not be granted.Where the co-owners build houses on the co-owned lands, the provisions related to disposal of co-ownership lands in Article 34-1 of the Land Law shall govern.
中文原文 新市鎮開發條例第20條
新市鎮特定區內建築基地未達新市鎮特定區計畫規定之最小建築基地面積者,不予核發建築執照。
共有人於其共有土地建築房屋,適用土地法第三十四條之一有關共有土地處分之規定。

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