With the so-called Rome I and II Regulations the Member States of the European Union are bound to a common set of rules for the choice of law in international private law disputes. They apply to both contractual and non-contractual disputes, their reach even extends to the application of non-Member State law. This poses great challenges to Courts and practitioners in every EU Member State, as there is only little case-law and doctrinal literature on the new rules, the uniform application of which will be overseen by the European Court of Justice. The Commentary answers to these challenges. It is an indispensable companion for both academics and legal professionals seeking their way through the Regulations. Renowned conflict of laws scholars comment every provision of the Regulations in a systematic, thorough and comprehensive manner, making them accessible to a broad international legal audience. Mirroring the German tradition of scholarly commentaries on Parliamentary Acts, the authors are selected from the distinguished group of relatively young German private international law scholars, whose exceptionally high qualifications are represented by their passing through the German "Habilitation"-system (second book requirement) as well as their proven ability to publish in the English language. The editor Gralf-Peter Calliess holds the chair for Private Law, Private International Law, International Business Law and Legal Theory at the faculty of Law of the University of Bremen. List of Authors: Professor Dr. Dietmar Baetge, University of Applied Science Wildau Assistant Professor Dr. Frank Bauer, University of Giessen Professor Dr. Benedikt Buchner, LL.M. (UCLA), University of Bremen Professor Dr. Martin Franzen, University of Munich Professor Dr. Martin Gebauer, University of Tuebingen Professor Dr. Urs Peter Gruber, University of Mainz Professor Dr. Axel Halfmeier, Frankfurt School of Finance Professor Dr. Jan von Hein, University of Trier Professor Dr. Lars Klohn, LL.M. (Harvard), University of Munich Senior Lecturer Dr. Leander D. Loacker, University of Zurich Assistant Professor Moritz Renner, University of Bremen Assistant Professor Dr. Florian Roedl, University of Frankfurt Professor Dr. Boris Schinkels, LL.M. (Cambridge), University of Greifswald Professor Dr. Christoph Schmid, University of Bremen Professor Dr. Goetz Schulze, University of Potsdam Prof. Dr. Matthias Weller, EBS Wiesbaden