{
  "url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002/schedule-2/part-II",
  "json_url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002/schedule-2/part-II.json",
  "legislation": "nisr/2002/94",
  "legislation_title": "The Air Quality Limit Values Regulations (Northern Ireland) 2002",
  "legislation_url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002",
  "path": "schedule/2/part/II",
  "kind": "part",
  "number": "II",
  "heading": "DETERMINATION OF EXCEEDANCES OF UPPER AND LOWER AND LOWER ASSESSMENT THRESHOLDS",
  "text": "Exceedances of upper and lower assessment thresholds must be determined on the basis of concentrations during the previous five years where sufficient data are available. An assessment threshold will be deemed to have been exceeded if it has been exceeded during at least three separate years out of those previous five years.\nWhere fewer than five years' data are available, measurement campaigns of short duration during the period of the year and at locations likely to be typical of the highest pollution levels may be combined with results obtained from emission inventories and modelling to determine exceedances of the upper and lower assessment thresholds.",
  "extent": "N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 2 Pt. II in operation at 1.5.2002, see reg. 1"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2002/94/schedule/2/part/II",
    "retrieved_at": "2026-10-29T02:08:23.952723+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."
}