Aircraft Flight Operation Regulations Article 76
Unless the operation has been specifically approved by CAA, an airplane with two turbine power-units shall not be operated on a route where the flight time at single-engine cruise speed to an adequate en-route alternate aerodrome exceeds 60 minutes under wind-calm conditions.An airplane with two or more turbine powered engines operated under extended diversion time operations (EDTO) shall have adequate en-route alternate aerodromes specified in the operational flight plan, and shall comply with the international flight standards as approved and adopted by CAA.
中文原文 航空器飛航作業管理規則第76條
除經民航局核准外，航空器使用人使用雙渦輪發動機之飛機，於航路中之任一航點轉降至其適當航路備用機場，不得超過以單發動機失效之正常巡航速度及靜風狀況下飛航六十分鐘之距離。
航空器使用人以二具以上渦輪發動機之飛機實施延展轉降時限作業，應在操作飛航計畫中選定航路備用機場，並依民航局核定採用之國際飛航標準辦理。
航空器使用人以二具以上渦輪發動機之飛機實施延展轉降時限作業，應在操作飛航計畫中選定航路備用機場，並依民航局核定採用之國際飛航標準辦理。