Regulations Governing the Division of Foreign Affairs-Related Authority & Responsibility and Contact between Military Police and Police in the Taiwan Areas Article 6

Inspection of the certificate and identity of the guides who are required by foreign soldiers in Taiwan shall be handled by the police. However, once they enter a military area, the inspection may be executed by the military police.
中文原文 臺灣地區憲警外事勤務權責劃分及聯繫辦法第6條
在臺外國軍人需要之導遊人員,其導遊證件及身分檢查,由警察機關掌理,但進入軍事管理區域,憲兵得檢查之。

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