{
  "url": "https://openlegislation.uk/air-navigation-carbon-offsetting-and-reduction-scheme-for-international-aviation-order-2021/schedule-2/paragraph-3",
  "json_url": "https://openlegislation.uk/air-navigation-carbon-offsetting-and-reduction-scheme-for-international-aviation-order-2021/schedule-2/paragraph-3.json",
  "legislation": "uksi/2021/534",
  "legislation_title": "The Air Navigation (Carbon Offsetting and Reduction Scheme for International Aviation) Order 2021",
  "legislation_url": "https://openlegislation.uk/air-navigation-carbon-offsetting-and-reduction-scheme-for-international-aviation-order-2021",
  "path": "schedule/2/paragraph/3",
  "kind": "paragraph",
  "number": "3",
  "heading": "Method A",
  "text": "(1) The aeroplane operator must use the following formula to compute fuel use according to Method A—\nF N = T N − T N±1 ± U N±1 where—\nFN = Fuel used for the flight under consideration (i.e. flight N) determined using Method A (in tonnes);\nTN = Amount of fuel contained in aeroplane tanks once fuel uplifts for the flight under consideration (i.e. flight N) are complete (in tonnes);\nTN+1 = Amount of fuel contained in aeroplane tanks once fuel uplifts for the subsequent flight (i.e. flight N+1) are complete (in tonnes); and\nUN+1 = Sum of fuel uplifts for the subsequent flight (i.e. flight N+1) measured in volume and multiplied with a density value (in tonnes).\n(2) The aeroplane operator performing on an ad-hoc basis flights attributed to another aeroplane operator must provide to the latter the fuel measurement values according to the Block-off/Block-on method.\n(3) Where no fuel uplift for the flight or subsequent flight takes place, the amount of fuel contained in aeroplane tanks (TN or TN+1) must be determined at block-off for the flight or subsequent flight. In exceptional cases the variable TN+1 cannot be determined. This is the case when an aeroplane performs activities other than a flight, including undergoing major maintenance involving the emptying of the tanks, after the flight to be monitored. In such case the aeroplane operator may substitute the quantity “TN+1 + UN+1” with the amount of fuel remaining in tanks at the start of the subsequent activity of the aeroplane or fuel in tanks at Block-on, as recorded by technical logs.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 2 para. 3 in force at 26.5.2021, see art. 1"
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "See Attachment C-1 in Volume IV of Annex 16 to the Chicago Convention for a process diagram for monitoring fuel use by flight using Method A."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "See article 28 for requirements on fuel density values."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2021/534/schedule/2/paragraph/3",
    "retrieved_at": "2026-10-28T22:14:08.873830+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}