http://dx.doi.org/10.17176/20161107-103743 https://staging.verfassungsblog.de/the-article-50-litigation-and-the-court-of-justice-why-the-supreme-court-must-refer/ The Article 50 Litigation and the Court of Justice: Why the Supreme Court must refer Lang, Richard eng 2016-11-06 electronic resource text/html ddc:342 Art. 50 TEU brexit Referral to the ECJ UK Supreme Court Verfassungsblog Verfassungsblog--2366-7044 CC BY-NC-ND 4.0 Article 50 TEU says that member states decide to withdraw from the Union "according to their own constitutional requirements". It is for the Luxembourg Court to clarify what this means. Thus, in the current case on Brexit the UK Supreme Court is obliged to refer to the European Court of Justice. One could argue that this should never have been made a Union problem. But it was, and, like it or not, that makes it the Court of Justice’s problem too.