Aircraft Flight Operation Regulations Article 265
The navigation equipment installation shall be such that the failure of any single unit required for either communications or navigation purposes or both will not result in the other unit required for communications or navigation purposes.
中文原文 航空器飛航作業管理規則第265條
裝置於航空器之通信及導航裝備，於任一具供通信或導航或二者共同裝備發生故障時，不得造成其他相同用途裝備亦發生故障。