{
  "url": "https://openlegislation.uk/eu-regulation-2009-262/article-7",
  "json_url": "https://openlegislation.uk/eu-regulation-2009-262/article-7.json",
  "legislation": "eur/2009/262",
  "legislation_title": "Commission Regulation (EC) No 262/2009 of 30 March 2009 laying down requirements for the coordinated allocation and use of Mode S interrogator codes for the single European sky (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2009-262",
  "path": "article/7",
  "kind": "article",
  "number": "7",
  "heading": "Contingency requirements",
  "text": "1. Air traffic service providers shall assess the possible impact on air traffic services of interrogator code conflicts, and the corresponding potential loss of Mode S target surveillance data from the impacted Mode S interrogators, taking into account their operational requirements and available redundancy.\n2. Unless the potential loss of Mode S target surveillance data has been assessed to have no safety significance, Mode S operators shall:\n(a) implement monitoring means to detect interrogator code conflicts caused by other Mode S interrogators impacting eligible Mode S interrogators they operate on any operational interrogator code;\n(b) ensure that the interrogator code conflict detection provided by the implemented monitoring means is achieved in a timely manner and within a coverage that satisfy their safety requirements;\n(c) identify and implement as appropriate, a fallback mode of operation to mitigate the possible interrogator code conflict hazards on any operational code, identified in the assessment referred to in paragraph 1;\n(d) ensure that the implemented fallback mode of operation does not create any interrogator code conflict with other Mode S interrogators referred to by the interrogator code allocation plan.\n3. Mode S operators shall report any identified interrogator conflict involving an eligible Mode S interrogator they operate on any operational interrogator code to the CAA and shall make available, through the IC allocation system, the related information to the other Mode S operators.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Word in Art. 7(3) substituted (31.12.2020) by The Air Traffic Management (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/459), regs. 1(2), 144; 2020 c. 1, Sch. 5 para. 1(1)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2009/262/article/7",
    "retrieved_at": "2026-11-01T14:51:34.631349+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."
}