Aircraft Flight Operation Regulations Article 285-22

An operator shall ensure that each flight crew member assigned to duty holds a valid license and are competent to carry out assigned duties.
中文原文 航空器飛航作業管理規則第285-22條
航空器使用人應確認每一飛航組員之檢定證及體格檢查及格證之有效性,並能勝任其職務。

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