Regulations for Administration on Fixed Network Telecommunications Business Article 56

Applicants or operators shall use telecommunications numbers in accordance with provisions of the Regulations Governing the Numbering of Telecommunications.
中文原文 固定通信業務管理規則第56條
申請人或經營者應依電信號碼管理辦法之有關規定使用電信號碼。

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