Commercial Group Act Article 43

The fund of commercial trade associations of all level are borne by their group members in proportion to their perennial membership dues, ranging from five to twenty percent, which is to be stipulated in the articles of relevant commercial trade associations.
中文原文 商業團體法第43條
各級商業同業公會聯合會之經費,由所屬團體會員,各以其常年會費百分之五至百分之二十,於章程中訂定繳納之。

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