Household Registration Act Article 45

After the cases for household registrations occur or are ascertained, but no applicants are available for those cases as stated in Articles 29 to 32, the first proviso of Article 33, proviso of Article 34, Article 36 and Article 40, Article 41 and its first two provisos, the interested persons shall act as the applicants.
中文原文 戶籍法第45條
應辦理戶籍登記事項,無第二十九條至第三十二條、第三十三條第一項但書、第三十四條但書、第三十六條、第四十條、第四十一條及前二條之申請人時,得以利害關係人為申請人。

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