The creation of the Single Supervisory MechanismSingle Supervisory Mechanism (SSM) (‘SSM’) will undoubtedly soon be regarded as one of the milestones of European integration; and, not only because of the novelties it is bringing about in terms of legal construction—with the largely unprecedented situation in which a Union institution, within the framework of its prerogatives iure imperii, is obliged to also apply certain provisions of national law-but also because of the high level of cooperationCooperation (public-public) between [competent] authorities at Union and national level, which is at its very foundation.