Labor Union Act Article 16

The general meeting of members of a labor union shall be the body with supreme authority of the union. Provided that, in case a labor union has a general meeting of member representatives, the authority of the general meeting of members shall be exercised by the general meeting of member representatives.
中文原文 工會法第16條
工會會員大會為工會之最高權力機關。
但工會設有會員代表大會者,由會員代表大會行使會員大會之職權。

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