Telecommunications Management Act Article 70

Where the user of a telecommunications number encounters any of the following circumstances, the competent authority may abolish the allocation of telecommunications numbers in whole or in part:1. Without justifiable reasons, the user fails to use the number for more than 1 year upon the date of allocation;2. The user fails to pay the telecommunications number use fees within the prescribed deadline, and the payment remains unpaid upon receipt of the competent authority’s notification;3. The competent authority has revoked or abolished its registration of the telecommunications enterprise;4. The competent authority has revoked or abolished the PSTN approval certificate thereof.
中文原文 電信管理法第70條
電信號碼之使用者有下列情形之一者,主管機關得廢止其一部或全部電信號碼之核配:
一、無正當理由,自核配使用之日起逾一年未使用。
二、未依規定繳納電信號碼使用費,經通知限期繳納,屆期仍未繳納。
三、經主管機關撤銷或廢止其電信事業之登記。
四、經主管機關撤銷或廢止其公眾電信網路審驗合格證明。

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