Aircraft Flight Operation Regulations Article 248-2

Where portable EFBs are used on board an airplane, the operator shall ensure that they do not affect the performance of the airplane systems, equipment or the ability to operate the airplane.
中文原文 航空器飛航作業管理規則第248-2條
航空器使用人於飛機上使用攜帶式電子飛行包者,應確保其不影響飛機系統與裝備性能及飛航作業。

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