Household Registration Act Article 30

The applicant for registration of parentage shall be the recognizer. If the recognizer does not make the application, the recognized one shall be the applicant.
中文原文 戶籍法第30條
認領登記,以認領人為申請人;認領人不為申請時,以被認領人為申請人。

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