Soft law and its role in the enforcement of EU law: Apart from the Treaty infringement procedure there are more and more procedures, mostly laid down in secondary law, by which the EU - often using soft law - ensures Member States’ compliance with EU law. This development entails a considerable transforming power. It deserves not only a foundational, mainly competence-oriented analysis of EU soft law, but also a systemic and legal account of these procedures in which it is often EU agencies - instead of the Commission and the European Court of Justice, as provided for in the TFEU - which, largely beyond public attention, interpret EU law and, on this basis, try to enforce it vis-a-vis the Member States.