Article 2

For the purposes of this Directive: trans-European high-speed rail system means the structure described in Annex I, composed of the railway infrastructures comprising lines and fixed installations, of the trans-European transport network, constructed or upgraded to be travelled on at high speeds, and rolling stock designed for travelling on those infrastructures; interoperability means the ability of the trans-European high-speed rail system to allow the safe and uninterrupted movement of high-speed trains which accomplish the specified levels of performance. This ability rests on all the regulatory, technical and operational conditions which must be met in order to satisfy essential requirements; subsystems means that the trans-European high-speed rail system is subdivided, as described in Annex II, into structural or functional subsystems for which essential requirements must be laid down; interoperability constituents means any elementary component, group of components, subassembly or complete assembly of equipment incorporated or intended to be incorporated into a subsystem, upon which the interoperability of the trans-European high-speed rail system depends either directly or indirectly; essential requirements means all the conditions set out in Annex III which must be met by the trans-European high-speed rail system, subsystems and their interoperability constituents; European specification means a common technical specification, a European technical approval or a national standard implementing a European standard, as defined in points 8 to 12 of Article 1 of Directive 93/38/EEC; technical specifications for interoperability (hereinafter TSIs) means the specifications by which each subsystem is covered in order to meet the essential requirements by establishing the necessary reciprocal functional relations between the subsystems of the trans-European high-speed rail system and by ensuring the latter's compatibility; joint representative body means the body bringing together representatives of the infrastructure managers, railway companies and industry which is responsible for drawing up TSIs. 'Infrastructure managers` means those referred to in Articles 3 and 7 of Directive 91/440/EEC; notified bodies means the bodies which are responsible for assessing the conformity or suitability for use of the interoperability constituents or for appraising the EC procedure for verification of the subsystems.

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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.