Enforcement Act of the Part of General Principles of the Civil Code Article 18

If the statutory extinctive prescription has already completed before the coming into force of the Part of General Principles of the Civil Code, the prescription has completed.If the period of a statutory extinctive prescription before the coming into force of the Part of General Principles of the Civil Code is longer than that provided by the Part of General Principles of the Civil Code, the provisions before the coming into force shall be applied. However, if the remainder of the period of prescription reckoned from the date of the coming into force of the Part of General Principles of the Civil Code is longer than that provided by the Part of General Principles of the Civil Code, the provisions provided by the Part of General Principles of the Civil Code shall be applied from the date of the coming into force.
中文原文 民法總則施行法第18條
民法總則施行前之法定消滅時效已完成者,其時效為完成。
民法總則施行前之法定消滅時效,其期間較民法總則所定為長者,適用舊法,但其殘餘期間,自民法總則施行日起算較民法總則所定時效期間為長者,應自施行日起,適用民法總則。

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