Act Governing the Conversion of Currency Units Used in Existing Laws and Regulations into New Taiwan Dollars Article 2

If the currency unit for a monetary amount specified in existing laws or regulations is Yuan (圓), Silver Yuan (銀元), or Yuan (元), multiply the monetary amount by three to convert the currency unit into New Taiwan Dollars.
中文原文 現行法規所定貨幣單位折算新臺幣條例第2條
現行法規所定金額之貨幣單位為圓、銀元或元者,以新臺幣元之三倍折算之。

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