Administrative Regulations on the Establishment and Operation of Dedicated Telecommunications, and the Connection of Dedicated Telecommunications to Public Communication System Article 15

Communications processed through the dedicated telecommunications shall not be accessed or taped without authorization, nor shall the privacy thereof be violated through other illegal means.
中文原文 專用電信設置使用及連接公共通信系統管理辦法第15條
專用電信處理之通信,他人不得盜接、盜錄、或以其他非法之方法侵犯其秘密。

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