This article assumes that a central problem for effective implementation of European legislation is the impact of national administrative traditions, since the formal and practical transformation of EU law rests mainly at the national level. The article investigates the interplay of national administrative traditions and European policy implementation. National administrative traditions prevalent in a policy field may differ from country to country. It is argued, that implementation effectiveness depends on the ‘’institutional scope'' of European adaptation pressure, which is not only affected by European requirements, but also by the embeddedness of the respective administrative traditions and national capacities for administrative reform. According to the degrees of adaptation pressure, different paths are distinguished, suggesting more or less effective implementation.