Merger control clearance is a key issue in planning and implementing larger M&A deals due to the standstill obligation established by Council Regulation (EC) No 139/2004 (EUMR) and most national competition laws within the EU. If the EUMR is applicable to a transaction, a one-stop-shop system is granted where the Commission has exclusive jurisdiction for merger clearance and the merger clearance regimes of Member States are disregarded.