Regulations Governing Number Portability Article 44

The Fixed Network Operator and the Mobile Operator shall bear its own set-up and maintenance costs incurred for implementing the Number Portability and providing communications services for the called Ported Subscribers.
中文原文 號碼可攜服務管理辦法第44條
固網經營者與行動經營者為提供號碼可攜服務及提供通信服務至受信攜碼用戶所需之建置及維護成本,應自行負擔之。

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