Spørgsmålet om en styrkelse af kontrollen, når det gælder overholdelsen af kompetencefordelingen mellem Unionen og medlemsstaterne, er en af de mest komplekse problemstillinger, vi står over for. ###>The question of strengthening controls to ensure that the division of competences between the Union and the Member States is respected forms a part of the most complex problems that we shall have to tackle.