Enforcement Rules of Labor Union Act Article 31
The term “not to join a labor union” referred to Subparagraph 2, Paragraph 1 to Article 35 of the Act, shall include demanding an employee to withdraw from a labor union that he (or she) has already joined.
中文原文 工會法施行細則第31條
本法第三十五條第一項第二款所稱不加入工會，包括要求勞工退出已加入之工會。