This article takes as its starting‐point the relationship between Article 30 of 30 of the EC Treaty (general rule on the free movement of goods) and the European Constitution. On the one hand, it examines Article 30 in the context of the constitutional dilemmas facing the European Union, particularly the balance of powers to be defined between Member States and the Union, between public power and the market, and between the legitimacy of Community law vis à vis that of national law. On the other hand, it reviews different conceptions of the European Economic Constitution by analysing the role of Article 30 in the review of market regulation.