Sch 4 para 2.5
Surveillance by approved body (2.5.1) The approved body responsible for checking production must have permanent access to building sites, production workshops, storage areas and, where appropriate, prefabrication or testing facilities and, more generally, to all premises which it considers necessary for its task. The approved body must receive from the project entity all the documents needed for that purpose and, in particular, the implementation plans and technical documentation concerning the subsystem. (2.5.2) The approved body responsible for checking implementation must periodically carry out audits in order to confirm compliance with the relevant NTSNs. It must provide those responsible for implementation with an audit report. Its presence may be required at certain stages of the building operations. (2.5.3) In addition, the approved body may pay unexpected visits to the worksite or to the production workshops. At the time of such visits the approved body may conduct complete or partial audits. It must provide those responsible for implementation with an inspection report and if appropriate, an audit report. (2.5.4) The approved body shall be able to monitor a subsystem on which an interoperability constituent is mounted in order to assess, where required by the corresponding NTSNs, its suitability for use in its intended railway environment.