(49)The definition of the keeper should be as close as possible to the definition used in the 1999 Convention concerning International Carriage by Rail (COTIF). Many entities can be identified as a keeper of a vehicle, such as the owner, a company carrying on a business with a fleet of wagons, a company leasing vehicles to a railway undertaking, a railway undertaking or an infrastructure manager using vehicles for maintaining its infrastructure. These entities have control over the vehicle with a view to its use as a means of transport by the railway undertakings and the infrastructure managers. In order to avoid any doubt, the keeper should be clearly identified in the national vehicle registers.