Enforcement Act of the Part of Rights In Rem of the Civil Code Article 7

A person who possesses a personal property before the coming into force of the Rights in Rem part of the Civil Code, and who fulfils the conditions set out in Article 768, acquires its ownership from the date of the coming into force of the Rights in Rem part.
中文原文 民法物權編施行法第7條
民法物權編施行前占有動產而具備民法第七百六十八條之條件者,於施行之日取得其所有權。

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