Regulations Governing Telecommunications Numbers Article 4

The subscriber numbers, ID codes and signaling point codes of numbering code used by the planners or operators shall be allotted by the Competent Authority or Commissioned Administrators. The same conditions shall be applied to relevant amendments.Prior to the use of numbering code, the planners or operators shall notify the Competent Authority, except in the case of signaling point codes. The same conditions shall be applied to relevant amendments.
中文原文 電信號碼管理辦法第4條
籌設者或經營者使用用戶號碼、識別碼及編碼之信號點碼,應經主管機關或受委託管理者核配;變更時,亦同。
籌設者或經營者使用編碼,除信號點碼外,應於使用前報主管機關備查;變更時,亦同。

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