{
  "url": "https://openlegislation.uk/air-quality-regulations-1997/schedule/paragraph-3",
  "json_url": "https://openlegislation.uk/air-quality-regulations-1997/schedule/paragraph-3.json",
  "legislation": "uksi/1997/3043",
  "legislation_title": "The Air Quality Regulations 1997",
  "legislation_url": "https://openlegislation.uk/air-quality-regulations-1997",
  "path": "schedule/paragraph/3",
  "kind": "paragraph",
  "number": "3",
  "heading": "Interpretation",
  "text": "“PM10” means the mass fraction of particles which if inhaled would penetrate beyond the larynx. This mass fraction shall be taken to be the thoracic convention, ET, as defined in ISO 7708:1995(E) ‘Air Quality—Particle size fraction definitions for health-related sampling’, published by the International Organisation for Standardisation.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1997/3043/schedule/paragraph/3",
    "retrieved_at": "2026-10-29T11:40:04.923689+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."
}