Work will be undertaken by the Nationale Bank van België/Banque Nationale de Belgique and De Nederlandsche Bank based on their existing system. As you can see a range of different organisational models are explored to achieve maximum synergies, e.g.
specialisation, attribution to one particular member of the Eurosystem team, decentralisation and, when and where needed, pooling, which means that a group of central banks provides a service for the entire Eurosystem.