CSS & TAF/TAP Regulation

The requirements for the Common Components System have been set by European Union legislation, namely:

  • Regulation 62/2006 (repealed by Regulation 1305/2015) Technical Specification for Interoperability Subsystem Telematics Applications for Freight – TAF TSI
  • Regulation 454/2011 for Technical Specification for Interoperability Relating to the Subsystem Telematics Applications for Passenger Services – TAP TSI.

Both regulations are now in the implementation phase. They require the railway industry to exchange certain types of messages in a standardised functional and technical way. To safeguard the interoperability of rail traffic, reference databases for Location Codes and Company Codes have to be established. A common interface enabling message exchange is mandatory for each actor wishing to join the railway interoperability community.

The regulations require unique coding for companies and locations:

  • For the operation of freight trains in Europe, reference files must be available and accessible to all service providers (infrastructure managers, railway undertakings, logistics providers and fleet managers)
  • For the operation of passenger trains in Europe, reference files must be available and accessible to all service providers (infrastructure managers, railway undertakings, authorised third parties and station managers). The data must present the actual status at all times.

The regulations also require the CI to be able to handle the following:

  • message formatting of outgoing messages according to the metadata
  • signing and encryption of outgoing messages
  • addressing of outgoing messages
  • authenticity verification of incoming messages
  • decryption of incoming messages
  • conformity checks of incoming messages according to metadata
  • providing a single access channel to various databases.

Finally, the regulations specify that in order to achieve optimum synergies, wherever the CI is in common use with reference to the TAP TSIs, any CI development or changes shall follow as closely as possible the already-implemented TAF TSIs.