Commercial Group Act Article 12

All licensed publicly owned or nongovernmental corporations or firms established in accordance with the Company Act or Business Registration Act should join the local commercial trade association and become member within one month following the establishment; multi-occupation corporations or firms should join at least one of the commercial trade association and become member unless otherwise stipulated by law.The above-mentioned members should send member representatives to attend the meetings of commercial trade association.
中文原文 商業團體法第12條
同一區域內,依公司法或商業登記法取得登記證照之公營或民營商業之公司、行號,均應於開業後一個月內,加入該地區商業同業公會為會員;其兼營二業以上商業者,除其他法律另有規定外,至少應選擇一業加入該業商業同業公會為會員。
前項會員應指派代表出席商業同業公會,稱為會員代表。

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