Regulations Governing the Placement and Service of Victims and Suspected Victims of Human Trafficking Article 19

Victims and suspected victims who are nationals without household registration in the Taiwan Area, foreign nationals, stateless persons, people of the Mainland Area, or residents of Hong Kong or Macau, leaving institutional placement service facilities without permission or have unknown whereabouts, shall, when discovered by the judicial police (unit), be handed over to the specialized operation brigades under respective Taiwan Administration Corp of the Immigration Agency, for legal custody or other necessary disposition.
中文原文 人口販運被害人及疑似人口販運被害人安置保護管理規則第19條
被害人及疑似被害人係臺灣地區無戶籍國民、外國人、無國籍人民、大陸地區人民、香港或澳門居民,有擅離機構式安置服務處所或行蹤不明之情事,經司法警察機關(單位)查獲,應移交移民署各區事務大隊所屬專勤隊依法收容或為其他必要處置。

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