# 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), Division 7.2.1.3: Compatibility with other trains

Extent: E+W+S+N.I.

An interoperable infrastructure may be used for the movement of trains not compliant with the requirements of this TSI, according to Article 5(4) of Directive 96/48/EC, provided this does not create prejudice to the fulfilment of essential requirements.
Such trains may use a class B signalling infrastructure, if existing. ERTMS/ETCS also offers the possibility of sending information for an on-board class B apparatus via class A track-to-train communication. If this solution is applied, in any case full ERTMS/ETCS functionality shall be installed trackside and the corresponding information shall be sent to the trains, to allow movement of interoperable trains. Trains equipped with on-board class B systems modified to receive information from class A track-to-train communication may not be declared interoperable.

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Source: https://www.legislation.gov.uk/eudn/2002/731/annex/division/7/division/7.2/division/7.2.1/division/7.2.1.3 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-731/annex/division-7/division-7.2/division-7.2.1/division-7.2.1.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.