Regulations Governing Licences and Ratings for Airmen Article 91

Types of aircraft shall be annotated on flight engineer's rating.Holder of flight engineer licence may only perform duties as appropriate to control, management and maintenance of the type of aircraft for which the licence holder is rated.
中文原文 航空人員檢定給證管理規則第91條
飛航工程師之檢定證應註明航空器型別。
飛航工程師僅得擔任經檢定合格航空器型別之航空器機械操作、管理及維護工作。

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