Industrial Group Act Article 53

A factory that has already joined in an industrial trade association should, if necessary, affiliate a local municipality or county or city industrial association.
中文原文 工業團體法第53條
已加入工業同業公會為會員之工廠,得因業務需要,加入其所在地之直轄市或縣(市)工業會為會員。

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