Schütze proposes three models that assist in explaining the transitions in the structure of the EU internal market and analyses the changing structure of European law in relation to the European internal market. He starts by offering a historical analysis of the relationship between international law and market coordination up to the twentieth century but also provides an in-depth analysis of the constitutional principles. He then specifically addresses the decline of the international model in relation to the EU internal market and the corresponding rise of a federal market philosophy after Cassis de Dijon. The final chapter explores the exceptional constitutional principles that apply to fiscal matters. This is the second volume in Schutze's trilogy on the 'Changing Structure of European Law'. The book complements his previous volume which analysed the evolving structure of positive integration. A third volume will finally explore the formal constitutional aspects in the evolution of the European Union into a federal union of States.