Household Registration Act Article 67

Any household registration record and kinsfolk relation record required by any authority shall be based on the household registration.The competent authority or Household Registration Office should provide the record mentioned. The central competent authority shall stipulate the application method, content, procedure, fees, and other items that should be followed.
中文原文 戶籍法第67條
各機關所需之戶籍資料及親等關聯資料,應以戶籍登記為依據。
前項資料,由各級主管機關及戶政事務所提供;其申請提供之方式、內容、程序、費用及其他應遵行事項之辦法,由中央主管機關定之。

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