The Incompatibility of Intra-EU Investment Treaty Arbitration With European Union Law – Assessing the Scope of the ECJ's Achmea Judgment

Abstract

Abstract: In March 2018, the European Court of Justice rendered its Achmea judgment, by which the Court considered the investor-State dispute settlement (ISDS) clause contained in the Dutch-Slovakian investment treaty to be incompatible with EU law. Even though the judgment is considered to be a landmark decision, its potentially far-reaching consequences remain, due to a rather obscure legal reasoning, difficult to assess. The aim of the present contribution is to assess the scope of the Achmea judgment in order to shed light on its relevance for pending and future intra-EU investment arbitrations. In view of the ECJ's Opinion 1/17 rendered in April 2019 and in consideration of recent arbitral practice it is concluded that the scope of the Achmea judgment concerns the incompatibility of intra-EU investment treaty arbitration with EU law. This means on the one hand that the reasoning in Achmea is transferrable not only to ISDS clauses in other intra-EU BITs, but also to Article 26 of the Energy Charter Treaty. On the other hand, the analysis shows that contract-based investment arbitrations are not concerned by the ECJ's findings. Finally, and in view of its clarified scope of application, the relevant factors for analysing the consequences of the Achmea judgement are identified.