{
  "url": "https://openlegislation.uk/eu-decision-2006-860/annex/division-4/division-4.2/division-4.2.1",
  "json_url": "https://openlegislation.uk/eu-decision-2006-860/annex/division-4/division-4.2/division-4.2.1.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/4/division/4.2/division/4.2.1",
  "kind": "division",
  "number": "4.2.1",
  "heading": "Control-Command safety characteristics relevant to interoperability",
  "text": "This Basic Parameter describes the safety requirements for ERTMS/ETCS on On-board assemblies and the safety requirements on Track-side assemblies.\nWith reference to the Essential Requirement ‘safety’ (see section 3.2.1, Safety), this Basic Parameter establishes the mandatory requirements for interoperability:\nTo ensure that the solutions to achieve safety do not jeopardise interoperability the requirements of Annex A, Index 47 shall be respected.\nFor the safety related part of one On board Assembly as well as for one Track-side Assembly, the safety requirement for ETCS level 1 or level 2 is: tolerable hazard rate (THR) of 10-9/hour (for random failures) corresponding to Safety Integrity Level 4. The detailed requirements for Class A equipment are specified in Annex A, Index 27. Less restrictive safety requirements on THR values for Track-side equipment may be adopted, provided that the safety objective for the service is met.\nThe reliability and availability requirements of Annex A, index 28 shall be respected.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "The safety requirements for ERTMS/ETCS level 3 still have to be established."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2006/860/annex/division/4/division/4.2/division/4.2.1",
    "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."
}