Commercial Group Act Article 30

When the member representatives of commercial trade association exceed three hundred persons, preparatory meetings are to be hold according to the division of districts before general meeting; group member representatives are to be elected in proportion to the number of member representatives of each district and then the group member representatives attend the general meeting to make decisions and exert duties of commercial trade association.
中文原文 商業團體法第30條
商業同業公會會員代表人數超過三百人以上時,得就地域之區分,先期分開預備會議;依其會員代表人數比例選出代表,再合開代表大會,行使會員大會之職權。

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