The Enforcement Act of Act of Military Service System Article 10

Standing Soldiers retire in advance during the period of Active Service in accordance with Articles 18 of the Act of Military Service System shall be determined by the order of the Ministry of National Defense.
中文原文 兵役法施行法第10條
常備兵服現役期間,依兵役法第十八條規定提前退伍者,由國防部以命令定之。

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