You know, this might be a fine point for constitutional scholars.

Frank Schnittger:

Unless the EU Directive is not in conformance with EU law as interpreted by the ECJ, a member state must implement it as EU law takes precedence even over the constitution of member states.

Do you know since which EU treaty this is the case?

A man of words and not of deeds is like a garden full of weeds; a man of deeds and not of words is like a garden full of turds — Anonymous