—(1) No Singapore aircraft shall be flown for the purpose of public transport, unless such requirements as are prescribed in respect of its weight and related performance have been complied with.
(2) The assessment of the ability of an aircraft to comply with sub-paragraph (1) shall be based on the information as to its performance contained in the Certificate of Airworthiness relating to the aircraft. In the event of the information given therein being insufficient for that purpose such assessment shall be based on the best information available to the commander of the aircraft.
(3) The requirements specified in Part D of the Ninth Schedule in respect of the weather conditions required for take-off, approach to landing and landing shall be complied with in respect of every aircraft to which paragraph 25 applies.
(4) An aircraft registered in Singapore when flying over water for the purpose of public transport shall fly, except as may be necessary for the purpose of take-off or landing, at such an altitude as would enable the aircraft —
if it has one engine only, in the event of the failure of that engine; and
if it has more than one engine, in the event of the failure of one of those engines and with the remaining engine or engines operating within the maximum continuous power conditions specified in the Certificate of Airworthiness relating to the aircraft,
to reach a place at which it can safely land at a height sufficient to enable it to do so.
(5) Except under and in accordance with the terms of any written permission granted by the chief executive officer to the operator, a Singapore aeroplane having two power units and a maximum total weight authorised exceeding 5,700 kg and which is not limited by its certificate of airworthiness to the carriage of fewer than 20 passengers, shall not fly for the purpose of public transport unless it will, in the meteorological conditions expected for the flight, at any point along the route or any planned diversion therefrom, not be more than 60 minutes flying time at the normal one engine inoperative cruise speed in still air from the nearest aerodrome.