preamble_20

Whereas, in view of the extent and complexity of the trans-European high-speed rail system, it has proved necessary for practical reasons to break it down into subsystems; whereas for each of those subsystems the essential requirements must be specified, the basic parameters laid down and the technical specifications determined for the whole of the Community, particularly in respect of constituents and interfaces, in order to meet those essential requirements; whereas, however, certain subsystems (environment, users and operation) will be subject to technical specifications for interoperability (TSIs) only in so far as is necessary to ensure interoperability in the fields of infrastructure, energy, control-and-command and signalling and rolling-stock;

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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.