Household Registration Act Article 48

The applications for household registrations should be made within 30 days after the cases concerned occur or are ascertained; however, birth registration must be made within 60 days.The Household Registration Office should still accept overdue applications.When the Household Registration Office finds overdue applications that are not made within the statutory time limit, it
中文原文 戶籍法第48條
戶籍登記之申請,應於事件發生或確定後三十日內為之。
但出生登記至遲應於六十日內為之。
前項戶籍登記之申請逾期者,戶政事務所仍應受理。
戶政事務所查有不於法定期間申請者,應以書面催告應為申請之人。

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