Regulations of Civil Air Transport Enterprise Article 8-1
The civil air transport enterprise who operates the scheduled air carrier service on international or domestic air routes with aeroplanes, shall use at least 3 aeroplanes to operate the above service.
中文原文 民用航空運輸業管理規則第8-1條
民用航空運輸業以飛機經營國際或國內航線定期航空運輸業務者，使用之飛機至少三架。