Physicians Act Article 9

Practicing physicians shall join the local medical association. Medical Associations may not refuse anyone with sufficient qualifications to join the association.
中文原文 醫師法第9條
醫師執業,應加入所在地醫師公會。
醫師公會不得拒絕具有會員資格者入會。

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