Enforcement Rules of the Implementation Act of Substitute Services Article 7

After receiving basic training for general substitute service, men of conscription age who have completed the policeman training and education but not performed the compulsory military service yet shall have their conscription records remarked that they have received the basic training for substitute service, and shall be registered as reservist draftees of substitute service.
中文原文 替代役實施條例施行細則第7條
完成警察人員養成教育且尚未履行兵役義務之役齡男子,於接受一般替代役基礎訓練後,應於役籍資料註記已受替代役基礎訓練,並以替代役備役列管。

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