# 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 7.2.4: CONDITIONS UNDER WHICH ‘O’ FUNCTIONS ARE REQUIRED

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

The ‘O’ functions are required in the following cases:
1.. an ETCS level 3 trackside assembly requires train integrity supervision on-board;
2.. an ETCS level 1 trackside assembly with infill requires corresponding infill functionality on-board if the release speed is set to zero for safety reasons (e.g. protection of danger points);
3.. when ETCS requires data transmission by radio the data transmission services of GSM-R shall be implemented.

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Source: https://www.legislation.gov.uk/eudn/2002/731/annex/division/7/division/7.2/division/7.2.4 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-731/annex/division-7/division-7.2/division-7.2.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.