Labor Standards Act Article 71

The working rules shall be null and void if they violate any mandatory or prohibitive provisions of statutes, administrative regulations, or collective agreements applicable to a particular business entity.
中文原文 勞動基準法第71條
工作規則,違反法令之強制或禁止規定或其他有關該事業適用之團體協約規定者,無效。

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