Below is direct from CAO...
remote island
means:
(a) Christmas Island; or
(b) Lord Howe Island; or
(c) Norfolk Island.
2.3 The minimum safe fuel for an aeroplane undertaking a flight to a remote
island is:
(a) the minimum amount of fuel that the aeroplane should carry on that
flight, according to the operations manual of the aeroplane’s operator,
revised (if applicable) as directed by CASA to ensure that an adequate
amount of fuel is carried on such flights; or
(b) if the operations manual does not make provision for the calculation of
that amount or has not been revised as directed by CASA — whichever
of the amounts of fuel mentioned in paragraph 2.4 is the greater.
2.4 For the purposes of subparagraph 2.3 (b), the amounts of fuel are:
(a) the minimum amount of fuel that will, whatever the weather conditions,
enable the aeroplane to fly, with all its engines operating, to the remote
island and then from the remote island to the aerodrome that is, for that
flight, the alternate aerodrome for the aircraft, together with any reserve
fuel requirements for the aircraft; and
Civil Aviation Order 82.0
5
(b) the minimum amount of fuel that would, if the failure of an engine or a
loss of pressurisation were to occur during the flight, enable the
aeroplane:
(i) to fly to its destination aerodrome or to its alternate aerodrome for the
flight; and
(ii) to fly for 15 minutes at holding speed at 1 500 feet above that
aerodrome under standard temperature conditions; and
(iii) to land at that aerodrome.