# Commission Decision of 14 November 2012 concerning the technical specification for interoperability relating to the ‘operation and traffic management’ subsystem of the rail system in the European Union and amending Decision 2007/756/EC (notified under document C(2012) 8075) (Text with EEA relevance) (2012/757/EU), Division 4.2.3.2: Identification of trains

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

Each train must be identified by a train running number. The train running number is given by the infrastructure manager when allocating a train path and must be known by the railway undertaking and all infrastructure managers operating the train. The train running number must be unique per network. Changes of train running number during a train journey should be avoided.

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Source: https://www.legislation.gov.uk/eudn/2012/757/annex/I/division/4/division/4.2/division/4.2.3/division/4.2.3.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2012-757/annex-I/division-4/division-4.2/division-4.2.3/division-4.2.3.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.