{
  "url": "https://openlegislation.uk/eu-regulation-2017-1485/article-133",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1485/article-133.json",
  "legislation": "eur/2017/1485",
  "legislation_title": "Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a guideline on electricity transmission system operation (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-1485",
  "path": "article/133",
  "kind": "article",
  "number": "133",
  "heading": "Synchronous area monitor",
  "text": "1. All TSOs of the GB synchronous area shall appoint one TSO of that synchronous area in the synchronous area operational agreement as synchronous area monitor.\n2. The synchronous area monitor shall implement the data collection and delivery process of the synchronous area referred to in Article 132.\n3. The synchronous area monitor shall implement the criteria application process referred to in Article 129.\n4. The synchronous area monitor shall collect the frequency quality evaluation data of its synchronous area and perform the criteria application process, including the calculation of the frequency quality evaluation criteria, once every 3 months and within 3 months after the end of the analysed period.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Words in Art. 133(1) substituted (E.W.S.) (31.12.2020) by The Electricity Network Codes and Guidelines (System Operation and Connection) (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/533), reg. 1(2), Sch. 1 para. 85 (as amended by S.I. 2020/1016, regs. 1(2), 6(2)); 2020 c. 1, Sch. 5 para. 1(1)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/1485/article/133",
    "retrieved_at": "2026-11-01T14:44:42.168103+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."
}