The Indigenous Peoples Basic Law Article 4

The government shall guarantee the equal status and development of self-governance of indigenous peoples and implement indigenous peoples’ autonomy in accordance with the will of indigenous peoples. The relevant issues shall be stipulated by laws.
中文原文 原住民族基本法第4條
政府應依原住民族意願,保障原住民族之平等地位及自主發展,實行原住民族自治;其相關事項,另以法律定之。

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