Enforcement Act of the Part of General Principles of the Civil Code Article 3

The provisions of Article 8, Article 9, and Article 11 of the Part of General Principles of the Civil Code shall also apply to the person who disappeared before the coming into force of the Part of General Principles of the Civil Code.If the period of disappearance provided in the Article 8 of the Part of General Principles of the Civil Code has elapsed before the coming into force of the Part of General Principles of the Civil Code, the declaration of death may be made immediately and the date of the coming into force of the Part of General Principles of the Civil Code shall be taken as the time of death of the absent person.The provisions of the revised Article 8 of the Part of General Principles of the Civil Code shall also apply to the person who disappeared after the coming into force but before the revision of the Part of General Principles of the Civil Code. Except before the revision of the Part of General Principles of the Civil Code, the situation has been in conformity with the provisions before the revision of Article 8 of the Part of General Principles of the Civil Code.
中文原文 民法總則施行法第3條
民法總則第八條、第九條及第十一條之規定,於民法總則施行前失蹤者,亦適用之。
民法總則施行前已經過民法總則第八條所定失蹤期間者,得即為死亡之宣告,並應以民法總則施行之日為失蹤人死亡之時。
修正之民法總則第八條之規定,於民法總則施行後修正前失蹤者,亦適用之。
但於民法總則修正前,其情形已合於修正前民法總則第八條之規定者,不在此限。

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