Enforcement Rules for the Act Governing Relations between Peoples of the Taiwan Area and the Mainland Area Article 70

The loss or termination of entitlement to retirement benefits and any payment related thereto pursuant to Article 90-1 of the Act shall commence upon violation of the provisions concerned; any overpaid amount shall be reclaimed.
中文原文 臺灣地區與大陸地區人民關係條例施行細則第70條
本條例第九十條之一所定喪失或停止領受月退休(職、伍)金及相關給與之權利,均自違反各該規定行為時起,喪失或停止領受權利;其有溢領金額,應予追回。

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