{
  "url": "https://openlegislation.uk/eu-regulation-2016-1388/annex-I",
  "json_url": "https://openlegislation.uk/eu-regulation-2016-1388/annex-I.json",
  "legislation": "eur/2016/1388",
  "legislation_title": "Commission Regulation (EU) 2016/1388 of 17 August 2016 establishing a Network Code on Demand Connection (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2016-1388",
  "path": "annex/I",
  "kind": "annex",
  "number": "I",
  "heading": "Frequency ranges and time periods referred to in Article 12(1)",
  "text": "Synchronous area\nFrequency range\nTime period for operation\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\nGreat Britain\n47.0 Hz- 47.5 Hz\n20 seconds\n47.5 Hz- 48.5 Hz\n90 minutes\n48.5 Hz- 49.0 Hz\nTo be specified by each TSO, but not less than 90 minutes\n49.0 Hz- 51.0 Hz\nUnlimited\n51.0 Hz- 51.5 Hz\n90 minutes\n51.5 Hz- 52.0 Hz\n15 minutes\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\n. . .\nThe table shows the minimum time periods for which a transmission-connected demand facility, a transmission-connected distribution facility or a distribution system has to be capable of operating on different frequencies, deviating from a nominal value, without disconnecting from the network.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Words in Annex 1 omitted (31.12.2020) by virtue of The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(a)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Words in Annex 1 omitted (31.12.2020) by virtue of The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(b)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Word in Annex 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(c)(i)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Word in Annex 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(c)(ii)"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Word in Annex 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(c)(iii)"
    },
    {
      "type": "F",
      "label": "F6",
      "text": "Word in Annex 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(c)(iv)"
    },
    {
      "type": "F",
      "label": "F7",
      "text": "Word in Annex 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(c)(v)"
    },
    {
      "type": "F",
      "label": "F8",
      "text": "Word in Annex 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(c)(vi)"
    },
    {
      "type": "F",
      "label": "F9",
      "text": "Word in Annex 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(c)(vii)"
    },
    {
      "type": "F",
      "label": "F10",
      "text": "Words in Annex 1 omitted (31.12.2020) by virtue of The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(d)"
    },
    {
      "type": "F",
      "label": "F11",
      "text": "Words in Annex 1 omitted (31.12.2020) by virtue of The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 2 para. 25(e)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2016/1388/annex/I",
    "retrieved_at": "2026-11-01T14:45:37.269760+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."
}