Condominium Administration Act Building Administration Division Article 7

Any of the shared areas of a condominium may not be used as part of an individual unit. The items specified in the following subparagraphs may not be designated as designated private areas:1. The lot the condominium is built on;2. The hallways or stairs leading to a number of individual units, the passages or vestibule leading to the outdoors, and the alleys and fire escape alleys within the community;3. The foundation, principal beams and pillars, load-bearing walls, and the structures of floors and roof of the condominium;4. When such designation is in violation of related laws;5. Any other shared areas that have been designed for particular purposes and are indispensible in the daily activities of all the unit owners.
中文原文 公寓大廈管理條例第7條
公寓大廈共用部分不得獨立使用供做專有部分。
其為下列各款者,並不得為約定專用部分:
一、公寓大廈本身所占之地面。
二、連通數個專有部分之走廊或樓梯,及其通往室外之通路或門廳;社區內各巷道、防火巷弄。
三、公寓大廈基礎、主要樑柱、承重牆壁、樓地板及屋頂之構造。
四、約定專用有違法令使用限制之規定者。
五、其他有固定使用方法,並屬區分所有權人生活利用上不可或缺之共用部分。

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