{
  "url": "https://openlegislation.uk/greater-london-authority-act-1999/section-346",
  "json_url": "https://openlegislation.uk/greater-london-authority-act-1999/section-346.json",
  "legislation": "ukpga/1999/29",
  "legislation_title": "Greater London Authority Act 1999",
  "legislation_url": "https://openlegislation.uk/greater-london-authority-act-1999",
  "path": "section/346",
  "kind": "section",
  "number": "346",
  "heading": "Monitoring and data collection.",
  "text": "It shall be the duty of the Mayor—\n(a) to monitor the implementation of the spatial development strategy;\n(b) to monitor the local plan, any document which is or forms part of a minerals and waste plan and any supplementary plans (within the meaning of Part 2 of the Planning and Compulsory Purchase Act 2004) of each London borough council; and\n(c) to monitor, and collect information about, matters relevant to the preparation, review, alteration, replacement or implementation of the spatial development strategy.",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Words in s. 346(b) substituted (28.9.2004 for E.) by Planning and Compulsory Purchase Act 2004 (c. 5), Sch. 7 para. 22(4) (with s. 111); S.I. 2004/2202, art. 2(i)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Words in s. 346(b) substituted (25.3.2026) by Levelling-up and Regeneration Act 2023 (c. 55), s. 255(3)(b), Sch. 8 para. 15 (with s. 247); S.I. 2026/169, reg. 3(f)(v) (with Sch. 1)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/1999/29/section/346",
    "retrieved_at": "2026-10-29T09:21:45.840103+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."
}