Benedikt Riedl
Die Ultra-vires-Kontrolle als Institut des Unionsrechts
Notwendigkeit, Bedingungen und Grenzen eines gemeineuropäischen Ultra-vires-Verfahrens
[Ultra Vires Review as a Legal Concept in European Union Law. Necessity, Exercise Requirements and Limits of a Common Ultra Vires Procedure in the European Legal System.]
2025. 652 pages. Summary
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Summary
Who ultimately decides where the European Union's competences end? Benedikt Riedl's analysis of the constitutional foundations in the member states and the EU treaties shows that ultra vires review is part of EU law, revealing it to be a shared European responsibility, with national constitutional courts and the European Court of Justice each playing distinct but complementary roles within a coherent legal framework.