A management body should be understood to have executive and supervisory functions. The competence and structure of management bodies differ across Member States. In Member States where management bodies have a one-tier structure, a single board usually performs management and supervisory tasks. In Member States with a two-tier system, the supervisory function is performed by a separate supervisory board which has no executive functions and the executive function is performed by a separate management board which is responsible and accountable for the day-to-day management of the undertaking. Accordingly, separate tasks are assigned to the different entities within the management body.