Enforcement Rules for the Act Governing Relations between Peoples of the Taiwan Area and the Mainland Area Article 25

For any person additionally receiving monthly pension payment, who applies under Paragraph 1 of Article 26 of the Act for a lump-sum pension payout, calculation of the payment shall be based on the ratio of the additional monthly pension payout.
中文原文 臺灣地區與大陸地區人民關係條例施行細則第25條
兼領月退休(職)給與人員,依本條例第二十六條第一項規定申請其應領之一次退休(職)給與者,應按其兼領月退休(職)給與之比例計算。

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