When the keeper delegates the ECM tasks to a third party, he remains responsible for ensuring that the vehicles and materials as well as the services comply with the specified requirements and conditions of use so that they can be safely used in operation by the railway undertaking and/or infrastructure manager. Keepers are obliged to take the following actions: select a qualified ECM and contract with them, ensure that the correct data is reported for the registration of vehicles in the NVR, ensure that vehicle maintenance can be performed at the locations and times specified by the ECM, inform the ECM of any technical problems and any corrective measures that may be required and arrange for the appropriate action to be taken, take concrete steps when the registered ECM's maintenance entity certificate has been suspended or withdrawn and inform the RUs/EIUs involved.