Mutual Trust and EU Accession to the ECHR: Are We Over the Opinion 2/13 Hurdle?

After more than forty years of discussion and a decade after the CJEU struck down EU accession to the ECHR in Opinion 2/13, negotiators provisionally approved a new version of the Accession Instruments in March 2023. This Insight examines how this new draft of the Accession Instruments has addressed the mutual trust concerns expressed in Opinion 2/13. It first traces the evolution of the negotiations on the “mutual trust basket”. Through a manual analysis of all negotiation documents, we concluded that the negotiated solution is built upon an alleged case law convergence between the CJEU and the ECtHR on mutual trust cases. Therefore, this contribution further assesses such assumption of convergence by looking at the CJEU’s broader language of mutual trust (beyond Opinion 2/13 and the Area of Freedom, Security and Justice) and the ECtHR’s mutual trust jurisprudence. We argue that the CJEU has conceptualised mutual trust as a general horizontal principle of EU law that, depending mostly on the cooperation scheme in which it is implemented and the fundamental rights that it might potentially affect, will present different degrees of automaticity. The latter, understood as the leeway (or lack thereof) for national authorities to invoke exceptions to mutual trust in light of potentially overriding interests, impacts the potential for convergence between the CJEU and ECtHR on mutual trust. Consequently, the full workability of the solutions devised in the draft Accession Instruments is called into question.