Enforcement Act of the Part of Obligations of the Civil Code Article 18

The provisions of Articles 250 to Article 253 of the Civil Code shall also apply to the penalty which was agreed upon before 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18條
民法第二百五十條至第二百五十三條之規定,於民法債編施行前約定之違約金,亦適用之。

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