Enforcement Act of the Part of Rights In Rem of the Civil Code Article 13-1

The provision of the revised Article 833-1 of the Civil Code shall also apply to the superficies of which the period has not been fixed before the revision of the BOOK of RIGHTS in REM of the CIVIL CODE, amended on 5th January 2010, coming into force.
中文原文 民法物權編施行法第13-1條
修正之民法第八百三十三條之一規定,於民法物權編中華民國九十九年一月五日修正之條文施行前未定有期限之地上權,亦適用之。

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