Regulations Governing Number Portability Article 46

An Operator shall provide communications services for Ported Subscribers and non-Ported Subscriber based at the same tariff rates.
中文原文 號碼可攜服務管理辦法第46條
經營者向攜碼用戶及非攜碼用戶提供通信服務時,其資費費率應為一致。

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