In this substantially revised and updated second edition, this work examines the intersection of EU law and international arbitration based on the experience of leading practitioners in both commercial and investment treaty arbitration law. It expertly illustrates the depth and breadth of EU law’s impact on party autonomy and on the margin of appreciation available to arbitral tribunals. This second edition covers all relevant new developments in law and practice, and tracks the ever-increasing influence of EU law and the jurisprudence of the Court of Justice of the EU (CJEU) in international arbitration. Key Features: An analysis of alternative dispute settlement mechanisms in investment treaties An analysis of the relevance of EU law on the validity of international agreements to arbitrate Discussion of proposals to support climate responsive international investment and commercial arbitration regime An introduction to the complex areas in which the EU regime and international investment arbitration laws intertwine, through a review of the development of the EU’s investment policy Consideration of the impact of EU law on challenges, recognition and enforcement of international commercial awards, and the relationship between anti-suit relief, EU law and the New York Convention An examination of the impact of EU law on specific issues in international investment arbitration including the Energy Charter Treaty, procedural issues (both ICSID and non-ICSID), damages, taxation, and the proposed Multilateral Investment Court and international taxation International Arbitration and EU Law is a specialist guide for arbitrators, lawyers, judges, and expert witnesses. It will also greatly benefit academics and advanced students working, researching or teaching international arbitration law.