In its Betfair judgment, the Court of Justice ruled that the exclusive license system with respect to games of chance under Dutch law breaches Article 49 of the EC, now: Article 56 of the TFEU, concerning the free movement of services, and in particular the principle of equal treatment and the obligation of transparency. This article addresses the lessons which can be drawn from this judgement and which Dutch legal concepts could be applied to this 'European' obligation of transparency. According to the judgement, this is not only the case for 'public contracts'and 'concessions', but also to licenses under public law. This article addresses the meaning of these legal concepts and discusses to what extent this 'European' obligation of transparency applies to the relevant Dutch legal concepts.

The case law of the Court of Justice on revoking a national final administrative decision or judgement which is not compliant with EU law can illustrate the existing tension between the principle of primacy on the one hand, and the principle of national procedural autonomy on the other. Although the Court’s choice for one of the two principles as a starting point for solving a collision between EU law and national law may seem arbitrary at first glance, a system may be possible to a certain extent. This study discusses this system, hoping to provide a possible model of explanation which may be applicable to future case law.