{
  "url": "https://openlegislation.uk/greenhouse-gas-emissions-trading-scheme-order-2020/schedule-2A/paragraph-35",
  "json_url": "https://openlegislation.uk/greenhouse-gas-emissions-trading-scheme-order-2020/schedule-2A/paragraph-35.json",
  "legislation": "uksi/2020/1265",
  "legislation_title": "The Greenhouse Gas Emissions Trading Scheme Order 2020",
  "legislation_url": "https://openlegislation.uk/greenhouse-gas-emissions-trading-scheme-order-2020",
  "path": "schedule/2A/paragraph/35",
  "kind": "paragraph",
  "number": "35",
  "heading": "Formulae to be used when calculating maritime emissions",
  "text": "(1) For the purposes of calculating maritime emissions, a maritime operator must use the following formula—\nMEETS=CO2ETS+CH4ETS×GWPCH4+N2OETS×GWPN2O\n(2) In the application of the formula referred to in sub-paragraph (1)—\n(a) a maritime operator must calculate CO2 emissions by adding the CO2 emissions of all fuels i used, applying the following formula—\nCO2ETS=∑iMi-Mi,NC×EFCO2,i\n(b) a maritime operator must calculate CH4 emissions by adding the CH4 emissions resulting from the combustion of all fuels i used together with the emissions caused by CH4 slippage, applying the following formula—\nCH4ETS=∑iMi-Mi,NC×EFCH4,i+CH4S\n(c) a maritime operator must calculate N2O emissions by adding the N2O emissions of all fuels i used applying the following formula—\nN2OETS=∑iMi-Mi,NC×EFN2O,i\n(3) The terms used in the equations are to be interpreted in accordance with Table C1.\nTable C1\nExplanation of terms used in relation to the equations\nTerm\nExplanation\nME ETS\nMaritime emissions to be reported under this Schedule, expressed in tonnes CO 2 equivalent, where “CO 2 equivalent” means the metric measure used to compute the emissions from CO 2, CH 4 and N 2O on the basis of their global warming potential, by converting amounts of CH 4 and N 2O to the equivalent amount of carbon dioxide with the same global warming potential.\nCO 2ETS\nTotal aggregated CO 2 emitted.\nCH 4ETS\nTotal aggregated CH 4 emitted.\nN 2O ETS\nTotal aggregated N 2O emitted.\nGWP CH4\nGlobal warming potential of CH 4 over 100 years which is 28tCO 2(e)/tCH 4.\nGWP N20\nGlobal warming potential of N 2O over 100 years which is 265tCO 2(e)/tN 2O.\ni\nIndex corresponding to the fuels used on board the ship in the scheme year.\nj\nIndex corresponding to emission sources on board the ship. For the purpose of this Schedule, the sources include the main engines, auxiliary engines, gas turbines, boilers and inert gas generators.\nM i\nFuel consumption, as total mass of the specific fuel i used (total for all emission sources).\nM i, j\nFuel consumption, as mass of the specific fuel i used in emission source j.\nC j\nTank to Wake emission factor of slipped fuel (slippage coefficient) as a percentage of the mass of the fuel i used by the emission source j [%].\nCj includes fugitive and slipped emissions. Fugitive and slipped emissions are emissions caused by the amount of fuel that does not reach the combustion chamber of the emission source or that is not consumed by the emission source because they are un-combusted, vented or leaked from the system.\nM i,NC\nTotal mass of fuel i not combusted but released into the atmosphere. For the purpose of determining such amount, a maritime operator must apply the following formula—\nMi,NC=∑i∑jMi,j×Cj100\nCH 4S\nAmount of CH4 non combusted released into the atmosphere. For the purpose of determining such amount, a maritime operator must apply the following formula—\nCH4S=Mi,NC\nEF CO2,i\nTank to Wake CO 2 emission factor by fuel i, as defined in Table C2.\nEF CH4,i\nTank to Wake CH 4 emission factor by fuel i, as defined in Table C2.\nEF N2O,i\nTank to Wake N 2O emission factor by fuel i, as defined in Table C2.\n(4) For the purposes of calculating maritime emissions, fuel consumption must be calculated separately for—\n(a) voyages;\n(b) in-port activities.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Sch. 2A inserted (1.7.2026) by The Greenhouse Gas Emissions Trading Scheme (Amendment) (Extension to Maritime Activities) Order 2026 (S.I. 2026/392), art. 1(1), Sch. 1"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2020/1265/schedule/2A/paragraph/35",
    "retrieved_at": "2026-10-28T22:23:06.111058+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."
}