{
  "url": "https://openlegislation.uk/air-navigation-environmental-standards-order-2002/article-10",
  "json_url": "https://openlegislation.uk/air-navigation-environmental-standards-order-2002/article-10.json",
  "legislation": "uksi/2002/798",
  "legislation_title": "The Air Navigation (Environmental Standards) Order 2002",
  "legislation_url": "https://openlegislation.uk/air-navigation-environmental-standards-order-2002",
  "path": "article/10",
  "kind": "article",
  "number": "10",
  "heading": "Unburned hydrocarbons, carbon monoxide and oxides of nitrogen emission requirements",
  "text": "(1) Subject to paragraph (4) this article shall apply to—\n(a) every turbojet engine and every turbofan engine intended for the propulsion of aeroplanes only at subsonic speeds the rated output of which is greater than 26.7 kilonewtons and the date of manufacture of which was on or after 1st January 1986;\n(b) every turbojet engine and every turbofan engine intended for the propulsion of aeroplanes at supersonic speeds, the date of manufacture of which was on or after 18th February 1982; and\n(c) every aeroplane which is powered by one or more than one turbojet engine or turbofan engine described in sub-paragraphs (a) or (b).\n(2) Subject to paragraph (4) and article 12, an aeroplane to which this article applies shall not land or take-off in the United Kingdom unless every engine of the description contained in paragraph (1)(a) or paragraph (1)(b) which is fitted to the aeroplane is of a type which has been certified in accordance with article 11 as complying with the requirements specified in paragraph (3) relating to the emission of unburned hydrocarbons, carbon monoxide and oxides of nitrogen.\n(3) The requirements referred to in paragraph (2) are—\n(a) for turbojet engines or turbofan engines intended for propulsion of aeroplanes only at subsonic speeds, the requirements specified in Part III, Chapter 2 of Volume II of Annex 16;\n(b) for turbojet engines or turbofan engines intended for propulsion of aeroplanes at supersonic speeds, the requirements specified in Part III, Chapter 3 of Volume II of Annex 16.\n(4) (a) The CAA may grant an exemption from the requirements referred to in paragraph (2) in respect of any engine manufactured after 31st December 1999 and in respect of which the CAA is satisfied that not more than 50 engines of that type will be manufactured after that date;\n(b) An exemption granted in accordance with sub-paragraph (a) shall cease to be valid immediately upon a manufacturer producing more than 50 engines of the type in question after 31st December 1999.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2002/798/article/10",
    "retrieved_at": "2026-10-29T07:09:42.321564+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."
}