# The Air Navigation (Carbon Offsetting and Reduction Scheme for International Aviation) Order 2021, Paragraph 6: Fuel Uplift

Extent: E+W+S+N.I.

(1) For flights with a fuel uplift, unless the subsequent flight has no uplift the aeroplane operator must use the following formula to compute fuel use according to the Fuel Uplift Method—
F N = U N where—
FN = Fuel used for the flight under consideration (i.e. flight N) determined using fuel uplift (in tonnes); and
UN = Fuel uplift for the flight considered, measured in volume and multiplied with a density value (in tonnes).
(2) For flight(s) without a fuel uplift (i.e. flight N+1, …, flight N+n), the aeroplane operator must use the following formula to allocate fuel use from the prior fuel uplift (i.e. from flight N) proportionally to block hour—
F N = U N ∗[ B H N B H N ±B H N±1 ±⋅⋅⋅±B H N±n ] F N±1 = U N ∗[ B H N±1 B H N ±B H N±1 ±⋅⋅⋅±B H N±n ] F N±n = U N ∗[ B H N±n B H N ±B H N±1 ±⋅⋅⋅±B H N±n ] where—
FN = Fuel used for the flight under consideration (i.e. flight N) determined using fuel uplift (in tonnes);
FN+1 = Fuel used for the subsequent flight (i.e. flight N+1) determined using fuel uplift (in tonnes);
FN+n = Fuel used for the follow-on flight (i.e. flight N+n) determined using fuel uplift (in tonnes);
UN = Fuel uplift for the flight under consideration (i.e. flight N) (in tonnes);
BHN = Block hour for the flight under consideration (i.e. flight N) (in hours);
BHN+1 = Block hour for the subsequent flight (i.e. flight N+1) (in hours); and
BHN+n = Block hour for the follow-on flight (i.e. flight N+n) (in hours).

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Source: https://www.legislation.gov.uk/uksi/2021/534/schedule/2/paragraph/6 (the official version)
Page: https://openlegislation.uk/air-navigation-carbon-offsetting-and-reduction-scheme-for-international-aviation-order-2021/schedule-2/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.