d ) „leidinggevende centrale bank » : de centrale bank die verant ­ woordelijk is voor het voeren van de gezamenlijke tender ­ procedure ; ###>By establishing a framework for joint Eurosystem procurement , the European Central Bank ( ECB ) aims at fostering the participation of the ECB and the national central banks of the Member States that have adopted the euro in such joint procurement . ( d ) « leading central bank » means the central bank responsible for conducting the joint tender procedure ;