As the legislation in question does not provide a basis for full harmonisation and as Directives allow the Member States a certain degree of discretion as to how to ensure their implementation, there are accordingly many differences between Member States in the approaches they have taken to implementation.
Kuna kõnealustes õigusaktides ei sätestata täielikku ühtlustamist ja direktiividega jäetakse liikmesriikidele teatav otsustusõigus selle üle, kuidas tagada nende rakendamine, on liikmesriikide rakendamisviiside vahel sellest tulenevalt palju erinevusi.