Regulations Governing Network Interconnection among Telecommunications Enterprises Article 22

For communications between mobile telecommunications networks, the tariff is priced by the call-originating telecommunications enterprise and collected from the call-originating subscribers. Revenue from the tariff belongs to the call-originating telecommunications enterprises. The call-originating telecommunications enterprises shall be in charge of the bad debts and their duty of paying related costs to the call-receiving telecommunications enterprises shall not be exempted due to the bad debts.
中文原文 電信事業網路互連管理辦法第22條
行動通信網路間相互通信時,其通信費由發信端電信事業訂價並由其向發信端用戶收取,通信費歸屬發信端電信事業,呆帳由發信端電信事業負責,發信端電信事業不得因呆帳之發生而免除其支付受信端電信事業相關費用之責任。

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