{
  "url": "https://openlegislation.uk/wireless-telegraphy-control-of-interference-from-radio-frequency-heating-apparatus-regulations-1971/schedule-1",
  "json_url": "https://openlegislation.uk/wireless-telegraphy-control-of-interference-from-radio-frequency-heating-apparatus-regulations-1971/schedule-1.json",
  "legislation": "uksi/1971/1675",
  "legislation_title": "The Wireless Telegraphy (Control of Interference from Radio-Frequency Heating Apparatus) Regulations 1971",
  "legislation_url": "https://openlegislation.uk/wireless-telegraphy-control-of-interference-from-radio-frequency-heating-apparatus-regulations-1971",
  "path": "schedule/1",
  "kind": "schedule",
  "number": "1",
  "heading": null,
  "text": "The limits of field strength and terminal voltage shall be as follows:\nCol. 1\nCol. 2\nCol. 3\nCol. 4\nCol. 5\nFrequency Range in MHz\nMaximum radiated field strength in microvolts per metre\nMaximum terminal voltage in microvolts per metre\nFor protection of safety of life services\nExceeding\nNot Exceeding\nMaximum radiated field strength in microvolts per metre\nMaximum terminal voltage in microvolts\n13·533\n13·553\n300,000\n5,000,000\n13·553\n13·567\nunlimited\nunlimited\n13·567\n13·587\n300,000\n5,000,000\n26·957\n27·283\nunlimited\nunlimited\n83·996\n84·004\n3,000,000\n167·992\n168·008\n3,000,000\n886\n906\n1,000,000\nFor all other frequencies in the ranges specified below, the limits of field strength and terminal voltage shall be as follows:\nCol. 1\nCol. 2\nCol. 3\nCol. 4\nCol. 5\n0·15\n0·2\n50\n3,000\n15\n1,000\n0·2\n0·285\n50\n2,000\n15\n650\n0·285\n0·49\n250\n2,000\n80\n650\n0·49\n0·5\n50\n2,000\n15\n650\n0·5\n1·605\n50\n1,000\n15\n350\n1·605\n3·95\n250\n1,000\n80\n350\n3·95\n30·00\n50\n1,000\n15\n350\n30·00\n470·00\n30\n10\n470·00\n1,000·00\n100\n35",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1971/1675/schedule/1",
    "retrieved_at": "2026-10-29T22:39:37.384805+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."
}