This paper discusses the role played by Dispute Resolution Mechanisms in the European Union and the North American Free Trade Agreement (NAFTA), and the way in which they potentially contribute to the constitutionalization of such Regional Trade Agreements. The European Court of Justice has played a major role in the constitutionalization of the European Union due to the preliminary reference procedure, as well as the principles of direct effect and supremacy. The lack of availability to NAFTA Dispute Resolution Mechanisms of the principles which are so influential with the European Court of Justice mean that NAFTA’s Dispute Resolution Mechanisms are unable to drive constitutionalization in a manner similar to the ECJ. Chapter 11 of NAFTA however has the potential to act as a agent of constitutionalization within the scope of international investment law, but not of NAFTA itself.

This paper discusses the role played by Dispute Resolution Mechanisms in the European Union and the North American Free Trade Agreement (NAFTA), and the way in which they potentially contribute to the constitutionalization of such Regional Trade Agreements. The European Court of Justice has played a major role in the constitutionalization of the European Union due to the preliminary reference procedure, as well as the principles of direct effect and supremacy. The lack of availability to NAFTA Dispute Resolution Mechanisms of the principles which are so influential with the European Court of Justice mean that NAFTA’s Dispute Resolution Mechanisms are unable to drive constitutionalization in a manner similar to the ECJ. Chapter 11 of NAFTA however has the potential to act as a agent of constitutionalization within the scope of international investment law, but not of NAFTA itself.