Immigration Act Article 91

When aliens, nationals without household registration in the Taiwan Area, people from Mainland China, as well as residents of Hong Kong and Macau undergo inspection of their travel documents upon entry/exit of the State or apply for residence or permanent residence, the National Immigration Agency shall obtain and keep a record of every individual’s biometric information.The preceding paragraph does not apply to any of the following circumstances:1. Under the age of fourteen (14)2. Exempted from applying for an Alien Resident Certificate pursuant to Paragraph 1, Article 273. Other cases approved by the National Immigration AgencyThe National Immigration Agency may deny the application of any person who hasn’t provided his/her biometrics pursuant to Paragraph 1, for entering and residing temporarily or permanently in the State.The relevant authority shall enact regulations on the collection of individual biometrics, content of information, measures, management and application of biometrics, as well as compliance with other requirements.
中文原文 入出國及移民法第91條
外國人、臺灣地區無戶籍國民、大陸地區人民、香港及澳門居民於入出國(境)接受證照查驗或申請居留、永久居留時,移民署得運用生物特徵辨識科技,蒐集個人識別資料後錄存。
前項規定,有下列情形之一者,不適用之:
一、未滿十四歲。
二、依第二十七條第一項規定免申請外僑居留證。
三、其他經移民署專案同意。
未依第一項規定接受生物特徵辨識者,移民署得不予許可其入國(境)、居留或永久居留。
有關個人生物特徵識別資料蒐集之對象、內容、方式、管理、運用及其他應遵行事項之辦法,由主管機關定之。

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