{
  "url": "https://openlegislation.uk/eu-decision-2006-860/annex/division-7/division-7.3",
  "json_url": "https://openlegislation.uk/eu-decision-2006-860/annex/division-7/division-7.3.json",
  "legislation": "eudn/2006/860",
  "legislation_title": "Commission Decision of 7 November 2006 concerning a technical specification for interoperability relating to the control-command and signalling subsystem of the trans-European high speed rail system and modifying Annex A to Decision 2006/679/EC concerning the technical specification for interoperability relating to the control-command and signalling subsystem of the trans-European conventional rail system (notified under document number C(2006) 5211) (Text with EEA relevance) (2006/860/EC)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2006-860",
  "path": "annex/division/7/division/7.3",
  "kind": "division",
  "number": "7.3",
  "heading": "Conditions under which optional functions are required",
  "text": "According to the characteristics of the track-side Control-Command Track-side Assembly and its interfaces with other sub-systems, some track-side ERTMS/ETCS and GSM-R functionality not classified as mandatory, may have necessarily to be implemented in certain applications to comply with the essential requirements.\nThe track-side implementation of National or Optional-functions must not prevent the entry onto that infrastructure for a train that complies only with the mandatory requirements of Onboard Class A system except as required for the following on-board optional functions:\nAn ETCS Level 3 Track-side application requires train integrity supervision onboard;\nAn ETCS Level 1 Track-side application with infill requires corresponding in-fill functionality onboard if the release speed is set to zero for safety reasons (e.g., protection of danger points).\nWhen ETCS requires data transmission by radio, the data transmission services of GSM-R must fulfil the ETCS data transmission requirements.\nAn onboard assembly, which incorporates a KER STM, may require to implement the K-interface.\nA GSM-R trackside vigilance functionality where implemented requires a vigilance onboard functionality as described in 4.3.2.11.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2006/860/annex/division/7/division/7.3",
    "retrieved_at": "2026-11-01T15:17:24.266188+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."
}