{
  "url": "https://openlegislation.uk/air-navigation-order-1989/schedule-1/paragraph-II",
  "json_url": "https://openlegislation.uk/air-navigation-order-1989/schedule-1/paragraph-II.json",
  "legislation": "uksi/1989/2004",
  "legislation_title": "The Air Navigation Order 1989",
  "legislation_url": "https://openlegislation.uk/air-navigation-order-1989",
  "path": "schedule/1/paragraph/II",
  "kind": "paragraph",
  "number": "II",
  "heading": null,
  "text": "Size of Marks\n(a) Flying Machines and Gliders\n(i) Wings: The letters constituting each group of marks shall be of equal height. The height of the letters shall be at least 50 centimetres.\n(ii) Fuselage (or equivalent structure) or Vertical Tail Surfaces: The marks on the fuselage (or equivalent structure) shall not interfere with the visible outlines of the fuselage (or equivalent structure). The marks on the vertical tail surfaces shall be such as to leave a margin of at least 5 centimetres along each side of the vertical tail surface. The letters shall be of equal height. The height of the letters constituting each group of marks shall be at least 30 centimetres. Where marks are required to be carried on the lower surface of aircraft having no fixed wing surface the height of the marks shall he at least 50 centimetres.\nProvided that where owing to the structure of the aircraft the appropriate height specified in this sub-paragraph (ii) is not reasonably practicable the height of the marks shall be the greatest height reasonably practicable in the circumstances consistent with compliance with Section III of this Part of this Schedule.\n(b) Airships and Free Balloons\nThe letters constituting each group of marks shall be of equal height. The height of the letters shall be at least 50 centimetres.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [
    {
      "type": "amended",
      "affecting": "uksi/1991/1726",
      "affecting_title": "The Air Navigation (Second Amendment) Order 1991"
    },
    {
      "type": "substituted",
      "affecting": "uksi/1993/231",
      "affecting_title": "The Air Navigation (Third Amendment) Order 1993"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1989/2004/schedule/1/paragraph/II",
    "retrieved_at": "2026-10-29T15:35:30.342240+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."
}