The CETA Opinion of the European Court of Justice and its Implications—Not that Selfish After All

In Opinion 1/17, the European Court of Justice (ECJ) found the investment court system compatible with European Union (EU) law. The ruling concerned the mechanism in the Comprehensive Economic and Trade Agreement (CETA) but the Court’s reasoning is equally applicable to other investment courts as established, for example, in the EU’s investment protection agreements with Singapore and Vietnam. This outcome was far from clear, given that in the past the accession to international dispute settlement bodies regularly foundered on the autonomy of the EU legal order. The present article parses the CETA Opinion and explores its implications. It particularly focuses on autonomy as a constitutional principle and its advancement in Opinion 1/17. Importantly, the ECJ accepted the superiority of a court created by international agreement in relation to the said agreement. Furthermore, it clarified that it is not prerequisite for the Court to rule first on the meaning to be given to an act of EU law before that act can be the subject matter of an investment dispute. Finally, the pdrerogative of the EU to autonomously set the level of protection of a public welfare goal must be secured in a treaty for the EU to join it.