Regulations Governing the Organization of the Supervisory Committee of Labor Retirement Reserve of a Business Entity Article 4

Workers' representatives of the supervisory committee shall be elected by the labour unions. Where a labour union does not exist, they may be elected by workers by direct election among themselves. Substitute members may also be elected.
中文原文 事業單位勞工退休準備金監督委員會組織準則第4條
監督委員會勞工代表由工會推選,未成立工會者由勞工直接選舉之,並得推選候補委員。

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