The Office of Rail Transport also performs its tasks in the field of monitoring rail market development, improving rail transport safety standards and cooperating with European institutions responsible for the functioning and development of the common rail services market. The tasks of the President of UTK ◄ in the field of technical supervision over the operation of railway lines and rail traffic safety: issuing, extending, amending and revoking safety authorisations, certificates and attestations, and also keeping registers of these documents: controlling the conformity of activities performed by infrastructure managers and railway undertakings with Community and national laws in the field of safety, authorising the placing in service of new or heavily modified rolling stock, issuing type approvals for structures and equipment intended for rail traffic management and type approvals for railway vehicles, and keeping a register of these approvals, controlling the performance of obligations by managers, railway undertakings and side-track users in respect of rail transport safety, and especially the observance of rules of rail traffic management and signalling, and technical conditions for railway vehicle operation, supervising the observance of safety rules in rail transport and the correct maintenance and operation of railway lines and side tracks, monitoring, promoting, implementing and expanding the scope of safety regulations, including the national safety rule system, maintaining the National Vehicle Register, supervising centres that provide training for advisers in the transport of dangerous goods by rail, appointing examination boards and granting powers to advisers on the transport of dangerous goods by rail (the President of UTK, as the National Safety Authority, supervises the safety of transport of dangerous goods by rail, conducts examination and grants powers to advisers in the safety of such transport),