Sch 7 para 1
Interoperability constituents The UK declaration of conformity or suitability for use applies to the interoperability constituents involved in the interoperability of the rail system. These interoperability constituents may be: (1.1) Multiple-use constituents These are constituents that are not specific to the railway system and which may be used as such in other areas. (1.2) Multiple-use constituents having specific characteristics These are constituents which are not, as such, specific to the railway system, but which must display specific performance levels when used for railway purposes. (1.3) Specific constituents These are constituents that are specific to railway applications.