3.

To the extent necessary in order to achieve the objectives referred to in Article 1, each TSI shall: indicate its intended scope (part of network or rolling stock referred to in Annex I: subsystem or part of subsystem referred to in Annex II); lay down essential requirements for each subsystem concerned and its interfaces vis-à-vis other subsystems; establish the functional and technical specifications to be met by the subsystem and its interfaces vis-à-vis other subsystems. If need be, these specifications may vary according to the use of the subsystem, for example according to the categories of line, hub and/or rolling stock provided for in Annex I; determine the interoperability constituents and interfaces which must be covered by European specifications, including European standards, which are necessary to achieve interoperability within the trans-European conventional rail system; state, in each case under consideration, the procedures for the assessment of conformity or suitability of use. This includes in particular the modules defined in Decision 93/465/EEC or, where appropriate, the specific procedures, to be used to assess either the conformity or the suitability for use of interoperability constituents and ‘EC’ verification of subsystems; indicate the strategy for implementing the TSIs. In particular, it is necessary to specify the stages to be completed in order to make a gradual transition from the existing situation to the final situation in which compliance with the TSIs shall be the norm; indicate, for the staff concerned, the professional qualifications and health and safety conditions at work required for the operation and maintenance of the above subsystem, as well as for the implementation of the TSIs.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-29 · Text as adopted (Official Journal); later amendments are not incorporated in this text.