{
  "url": "https://openlegislation.uk/eu-decision-2002-731/annex/division-4/division-4.1/division-4.1.1",
  "json_url": "https://openlegislation.uk/eu-decision-2002-731/annex/division-4/division-4.1/division-4.1.1.json",
  "legislation": "eudn/2002/731",
  "legislation_title": "Commission Decision of 30 May 2002 concerning the technical specification for interoperability relating to the control-command and signalling subsystem of the trans-European high-speed rail system referred to in Article 6(1) of Council Directive 96/48/EC (notified under document number C(2002) 1947) (Text with EEA relevance) (2002/731/EC)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2002-731",
  "path": "annex/division/4/division/4.1/division/4.1.1",
  "kind": "division",
  "number": "4.1.1",
  "heading": "BASIC PARAMETERS OF THE SUBSYSTEM: INTERNAL FUNCTIONS",
  "text": "This section specifies the functions of control-command class A equipment that are essential to interoperability. The ETCS functions required for interoperability are:\nthe cab-signalling function,\nthe automatic train protection function, comprising:\nselecting the speed supervision mode,\ndefining and providing the intervention function,\nsetting the train characteristics,\nproving train integrity (note: rolling stock TSI is also concerned),\nequipment health monitoring and failure mode support, comprising:\ninitialising the subsystem,\ntesting the subsystem in service,\ntesting the subsystem in depot,\nproviding failure mode support,\nexchanging data between the trackside assembly and the on-board assembly,\nmanaging the STMs,\nsupport to cab-signalling and automatic train protection, comprising:\nsupporting driving,\nproviding odometry,\nrecording data,\nthe vigilance function.\nTo achieve interoperability it is not necessary to standardise all the functions within the whole control-command and signalling subsystem. The principle followed is the definition of:\ntrackside standard functions, able to read data from national interlocking and signalling systems and to translate such data into standard messages for the trains,\nstandard interfaces for track-to-train and train-to-track communication,\non-board standard functions, ensuring that every train will react to data received from trackside in a predictable way.\nOnly the above mentioned functionality is considered in this chapter.\nThe GSM-R functions required for interoperability are the voice and data communication between trackside and on-board.\nIn Annex A, index 0a, the ETCS functional requirement specifications are indicated.\nIn Annex A, index 0b, the GSM-R functional requirement specifications are indicated.\nThe control-command functions are classified in three categories:\nM standard functions whose implementation is mandatory. For example: the ETCS end-of-movement authority,\nO functions for which the implementation is optional, but if implemented a standard specification applies. For example: GSM-R fax transmission,\nN functions of the national part of control-command. For example: interlocking functions.\nThe classification of the functions is indicated within the text of the ETCS FRS and the GSM-R FRS.\nETCS functions shall be implemented in accordance with the technical specifications indicated in Annex A, indices 5, 6, 7, 8, 9, and their performance shall conform to indices 2 and 18.\nThe vigilance function shall be implemented on-board in accordance with Annex A, index 10. Implementation may be:\noutside the ERTMS/ETCS, with an optional interface to the ERTMS/ETCS equipment on-board, or\ninside the ERTMS/ETCS on-board equipment.\nThe infill data transmission function in ETCS level 1 applications is only mandatory on-board under the conditions defined in section 7.\nGSM-R radio functions shall be implemented in accordance with the technical specifications indicated in Annex A, index 11.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Train integrity: the status of the completeness of the train according to operational rules."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2002/731/annex/division/4/division/4.1/division/4.1.1",
    "retrieved_at": "2026-11-01T15:18:30.359571+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."
}