Aircraft Flight Operation Regulations Article 65

An operator shall ensure that pressurized aircraft operated in expected thunderstorms or severe meteorological conditions is equipped with weather radar and functions normally.
中文原文 航空器飛航作業管理規則第65條
加壓航空器於預知雷雨或惡劣天氣情況下飛航時,航空器使用人應確保其裝置之氣象雷達作用正常。

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