{
  "url": "https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002/schedule-5/part-I/paragraph-wrapper21n1",
  "json_url": "https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002/schedule-5/part-I/paragraph-wrapper21n1.json",
  "legislation": "wsi/2002/3183",
  "legislation_title": "The Air Quality Limit Values (Wales) Regulations 2002",
  "legislation_url": "https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002",
  "path": "schedule/5/part/I/paragraph/wrapper21n1",
  "kind": "paragraph",
  "number": null,
  "heading": null,
  "text": "The uncertainty for modelling and objective estimation is defined as the maximum deviation of the measured and calculated concentration levels, over the period considered, by the limit value, without taking into account the timing of the events.",
  "extent": "E+W",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2002/3183/schedule/5/part/I/paragraph/wrapper21n1",
    "retrieved_at": "2026-10-29T00:12:37.924889+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."
}