Organization Act of the Council of Indigenous Peoples Article 4

The Council is composed of 19 to 29 members, all serving without remuneration. At least one representative of each of the indigenous tribes of Taiwan shall be appointed to the Council by the Premier of the Executive Yuan through the nomination of the Chairman from among indigenous representatives, relevant governmental representatives, scholars and experts. The term of office of each of the members is two years, and may be continued upon expiration. However, if the member is a related government representative, the term of office of the member is dependent on any changes to his/her position.Half or more of the members specified in the preceding Paragraph shall be indigenous persons.
中文原文 原住民族委員會組織法第4條
本會置委員十九人至二十九人,均為無給職,其中原住民族各族代表應至少一人由主任委員提請行政院院長就原住民族代表、有關機關代表及學者、專家派(聘)兼之,任期二年,任滿得連任,但委員為有關機關代表者,其任期隨職務異動而更易。
前項委員,應有二分之一以上人數具原住民族身分。

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