{
  "url": "https://openlegislation.uk/dangerous-substances-and-explosive-atmospheres-regulations-northern-ireland-2003/schedule-2/paragraph-2n1",
  "json_url": "https://openlegislation.uk/dangerous-substances-and-explosive-atmospheres-regulations-northern-ireland-2003/schedule-2/paragraph-2n1.json",
  "legislation": "nisr/2003/152",
  "legislation_title": "Dangerous Substances and Explosive Atmospheres Regulations (Northern Ireland) 2003",
  "legislation_url": "https://openlegislation.uk/dangerous-substances-and-explosive-atmospheres-regulations-northern-ireland-2003",
  "path": "schedule/2/paragraph/2n1",
  "kind": "paragraph",
  "number": "2",
  "heading": "Classification of hazardous places",
  "text": "Hazardous places are classified in terms of zones on the basis of the frequency and duration of the occurrence of an explosive atmosphere.\nZone 0\nA place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is present continuously or for long periods or frequently.\nZone 1\nA place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is likely to occur in normal operation occasionally.\nZone 2\nA place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is not likely to occur in normal operation but, if it does occur, will persist for a short period only.\nZone 20\nA place in which an explosive atmosphere in the form of a cloud of combustible dust in air is present continuously, or for long periods or frequently.\nZone 21\nA place in which an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur in normal operation occasionally.\nZone 22\nA place in which an explosive atmosphere in the form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only.",
  "extent": "N.I.",
  "status": "prospective",
  "version": "current",
  "annotations": [],
  "outstanding_effects": [
    {
      "type": "coming into force",
      "affecting": "nisr/2003/152",
      "affecting_title": "Dangerous Substances and Explosive Atmospheres Regulations (Northern Ireland) 2003"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2003/152/schedule/2/paragraph/2n1",
    "retrieved_at": "2026-10-29T02:03:46.931097+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."
}