De er af den opfattelse, at en sådan udvikling vil blive en følge såvel af det indre markeds funktion, der vil fremme en harmonisering af de sociale systemer, som af de i forfatningen foreskrevne procedurer og af den indbyrdes tilnærmelse af medlemsstaternes love og administrative bestemmelser.  
They believe that such a development will ensue not only from the functioning of the internal market, which will favour the harmonisation of social systems, but also from the procedures provided for in the Constitution and from the approximation of provisions laid down by law, regulation or administrative action of the Member States.  