Enforcement Act of the Part of Obligations of the Civil Code Article 22

In a contract of redemption constituted before the coming into force of the Part of Obligations of the Civil Code, if the redemption period is fixed, such period shall be followed. But if the remainder of the period, reckoning from the date of the coming into force of the Part of Obligations of the Civil Code is longer than that provided by Article 380 of the Civil Code, provision of Article 380 of the Civil Code shall be applied as from the date of their coming into force. In the event where no definite period is provided by the contract of redemption, the period shall not exceed five years beginning from the date of the coming into force of the Part of Obligations of the Civil Code.
中文原文 民法債編施行法第22條
民法債編施行前,所定買回契約定有期限者,依其期限,但其殘餘期限,自施行日起算,較民法第三百八十條所定期限為長者,應自施行日起,適用民法第三百八十條之規定,如買回契約未定期限者,自施行日起,不得逾五年。

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