Regulations Governing Universal Service of Telecommunications Enterprises Article 19

Universal service providers shall not reject any service applications in the areas in which they serve without justifiable reasons; apart from the approved fees and charges, the providers shall not charge the subscribers extra fees.
中文原文 電信事業普及服務管理辦法第19條
普及服務提供者於其提供普及服務之地區,無正當理由不得拒絕用戶要求服務之申請;除經核准之資費外,不得向用戶收取額外費用。

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