{
  "url": "https://openlegislation.uk/clean-air-act-1993/schedule-3/paragraph-4",
  "json_url": "https://openlegislation.uk/clean-air-act-1993/schedule-3/paragraph-4.json",
  "legislation": "ukpga/1993/11",
  "legislation_title": "Clean Air Act 1993",
  "legislation_url": "https://openlegislation.uk/clean-air-act-1993",
  "path": "schedule/3/paragraph/4",
  "kind": "paragraph",
  "number": "4",
  "heading": null,
  "text": "While, by virtue of an order under paragraph 3 above, paragraph 2 is excluded from applying to any work or to any specified part of any work—\n(a) in any proceedings brought under section 1, 2 or 20 in respect of the emission of smoke from the work or (as the case may be) from the specified part of the work it shall be a defence to prove that the best practicable means had been employed to prevent or minimise the alleged emission;\n(b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Sch. 3 ceased to have effect (in relation to activities falling within a prescribed process which has on 1.12.1994 ceased to be a prescribed process, on that date; in relation to activities falling within a prescribed process which has ceased to be a prescribed process later than 1.12.1994, on the date on which that process ceased to be a prescribed process; for all remaining purposes on 16.12.1996) by virtue of 1993 c. 11, s. 66(2); S.I. 1994/2854, art. 2(1); S.I. 1996/3056, art. 2"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Sch. 3 para. 4(b) repealed (1.4.1996) by 1995 c. 25, s. 120(3), Sch. 24 (with ss. 7(6), 115, 117); S.I. 1996/186, art. 3"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/1993/11/schedule/3/paragraph/4",
    "retrieved_at": "2026-10-29T09:35:15.099775+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."
}