http://dx.doi.org/10.17176/20230322-185237-0 https://verfassungsblog.de/constitutional-identity-ireland-and-the-eu/ Constitutional Identity, Ireland and the EU - The Irish Supreme Court Ruling Costello v. Government of Ireland Barrett, Gavin eng 2023-03-22 electronic resource text/html ddc:342 Constitutional Identity Costello European Integration European Union Ireland Irish Supreme Court Verfassungsblog Verfassungsblog--2366-7044 CC BY-SA 4.0 Costello v. Government of Ireland and others is one of the most significant recent Irish Supreme Court rulings concerning EU law. The case involved a member of parliament seeking to restrain the Irish government from ratifying the 2014 EU-Canada Comprehensive Economic and Trade Agreement (CETA) on grounds of alleged unconstitutionality. Costello’s most long-lasting impact is likely to be its introduction of the concept of constitutional identity into Irish constitutional jurisprudence.