Certified Public Bookkeepers Act Article 19

A registered certified public bookkeeper may not provide professional services, unless he/she has joined a certified public bookkeepers association. The certified public bookkeepers association shall not repudiate the admission of any applicant qualified to be a member of the association.
中文原文 記帳士法第19條
記帳士登錄後,非加入記帳士公會,不得執行業務;記帳士公會亦不得拒絕具有會員資格者加入。

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