Respiratory Therapists Act Article 30

A municipal or city/county respiratory therapist association shall be founded and organized by twenty-one or more respiratory therapists who practice in its jurisdiction. In the case of less than twenty-one respiratory therapists, they may join the association in an adjacent district.
中文原文 呼吸治療師法第30條
直轄市、縣(市)呼吸治療師公會,由該轄區域內呼吸治療師二十一人以上發起組織之;其未滿二十一人者,得加入鄰近區域之公會。

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