{
  "url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002/schedule-4/part-II",
  "json_url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002/schedule-4/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/4/part/II",
  "kind": "part",
  "number": "II",
  "heading": "MINIMUM NUMBER OF SAMPLING POINTS FOR FIXED MEASUREMENTS TO ASSESS COMPLIANCE WITH LIMIT VALUES FOR THE PROTECTION OF ECOSYSTEMS OR VEGETATION IN ZONES OTHER THAN AGGLOMERATIONS",
  "text": "If maximum concentrations exceed the upper assessment threshold\nIf maximum concentrations are between the upper and lower assessment thresholds\nIn island zones the number of sampling points for fixed measurement should be calculated taking into account the likely distribution patterns of ambient air pollution and the potential exposure of ecosystems or vegetation.\n1 station every 20 000 km2\n1 station every 40 000 km2",
  "extent": "N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 4 Pt. II in operation at 1.5.2002, see reg. 1"
    }
  ],
  "outstanding_effects": [
    {
      "type": "words added",
      "affecting": "nisr/2002/357",
      "affecting_title": "The Air Quality Limit Values (Amendment) Regulations (Northern Ireland) 2002"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2002/94/schedule/4/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."
}