{
  "url": "https://openlegislation.uk/town-and-country-planning-act-1990/section-171A",
  "json_url": "https://openlegislation.uk/town-and-country-planning-act-1990/section-171A.json",
  "legislation": "ukpga/1990/8",
  "legislation_title": "Town and Country Planning Act 1990",
  "legislation_url": "https://openlegislation.uk/town-and-country-planning-act-1990",
  "path": "section/171A",
  "kind": "section",
  "number": "171A",
  "heading": "Expressions used in connection with enforcement.",
  "text": "(1) For the purposes of this Act—\n(a) carrying out development without the required planning permission; or\n(b) failing to comply with any condition or limitation subject to which planning permission has been granted,\nconstitutes a breach of planning control.\n(2) For the purposes of this Act—\n(za) the issue of an enforcement warning notice in relation to land in England under section 172ZA;\n(a) the issue of an enforcement notice (defined in section 172);\n(aa) the issue of an enforcement warning notice in relation to land in Wales under section 173ZA; or\n(b) the service of a breach of condition notice (defined in section 187A),\nconstitutes taking enforcement action.\n(3) In this Part “planning permission” includes permission under Part III of the 1947 Act, of the 1962 Act or of the 1971 Act.",
  "extent": "E+W",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Ss. 171A, 171B inserted (2.1.1992 for certain purposes and otherwise 27.7.1992) by Planning and Compensation Act 1991 (c. 34, SIF 123:1), s. 4(1) (with s. 84(5)); S.I. 1991/2905, art.3 (subject to art. 5); S.I. 1992/1630, art. 2 (with art. 3(1))"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "S. 171A(2)(za) inserted (25.4.2024) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 117(2)(a), 255(3)(b) (with s. 247); S.I. 2024/452, reg. 3(d)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "S. 171A(2)(aa) inserted (6.9.2015 for specified purposes, 16.3.2016 in so far as not already in force) by Planning (Wales) Act 2015 (anaw 4), ss. 43(3), 58(2)(b)(4)(b); S.I. 2016/52, art. 5(c)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Words in s. 171A(2)(aa) substituted (25.4.2024) by Levelling-up and Regeneration Act 2023 (c. 55), ss. 117(2)(b), 255(3)(b) (with s. 247); S.I. 2024/452, reg. 3(d)"
    }
  ],
  "outstanding_effects": [
    {
      "type": "words inserted",
      "affecting": "asc/2026/7",
      "affecting_title": "Planning (Consequential Provisions) (Wales) Act 2026"
    },
    {
      "type": "words inserted",
      "affecting": "asc/2026/7",
      "affecting_title": "Planning (Consequential Provisions) (Wales) Act 2026"
    },
    {
      "type": "omitted",
      "affecting": "asc/2026/7",
      "affecting_title": "Planning (Consequential Provisions) (Wales) Act 2026"
    },
    {
      "type": "words omitted",
      "affecting": "asc/2026/7",
      "affecting_title": "Planning (Consequential Provisions) (Wales) Act 2026"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/1990/8/section/171A",
    "retrieved_at": "2026-11-06T03:35:00.269643+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."
}