Aircraft Flight Operation Regulations Article 69

A turbine-engined airplane, when a destination alternate aerodrome is required, shall carry sufficient fuel to allow the aircraft either:1. To fly to and execute an approach, and a missed approach, at the aerodrome to which the flight is planned, and thereafter:a) To fly to the alternate aerodrome specified in the operational and air traffic services flight plans;b) and then to fly for 30 minutes at holding speed at 1,500 ft above the alternate aerodrome under standard temperature conditions, and approach and land; andc) Contingency fuel, or2. To fly to the alternate aerodrome via any predetermined point and thereafter for 30 minutes at 1500 ft above the alternate aerodrome and contingency fuel, provided that fuel shall not be less than the amount of fuel required to fly to the aerodrome to which the flight is planned and thereafter for two hours at normal cruise consumption.
中文原文 航空器飛航作業管理規則第69條
渦輪發動機之飛機需備用機場者,應符合下列情形之一:
一、除應攜帶在操作飛航計畫中之目的地機場及進場、誤失進場油量外,應再攜帶下列油量:
(一)飛抵備用機場所需之油量。
(二)於標準溫度下,在備用機場上空一千五百呎高度以待命空速飛航三十分鐘及進場、降落所需之油量。
(三)應變油量。
二、除應攜帶操作飛航計畫中航路上任一預定點,飛抵備用機場油量外,應再攜帶於標準溫度下在備用機場標高上空一千五百呎之高度以待命空速飛航三十分鐘所需之油量及應變油量,但該總油量不得低於飛抵計畫中目的地機場後,仍有正常巡航二小時所需之油量。

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