“…Implementers' policy preferences can be shaped by their experiences and contacts with external and internal ‘principals’ including interest groups, clients, citizens, and so on (see, for example, Egeberg and Trondal, ; Yesilkagit and van Thiel, ). External influences generally emerge from actors' participation in trans‐national networks of policy experts and representatives of national regulatory bodies, who provide ideational and material resources for the implementation of EU policies (Andonova and Tuta, ; Keck and Sikkink, ). First, trans‐national networks strengthen the capacity of domestic actors to comply with EU rules through information dissemination about the most appropriate interpretation of EU rules (Andonova and Tuta, , p. 779).…”