Which case established the principle of EU law supremacy?
Costa v Enel
What does the principle of EU law supremacy mean?
EU law takes precedence over national law in areas of EU competence
Which EU institution ensures the enforcement of the supremacy of EU law?
European Court of Justice
What happens when there is a conflict between national law and EU law?
EU law must be set aside by national courts
Which case confirmed that national courts must disapply conflicting national laws?
Factortame
Does the principle of supremacy apply to all areas of law?
No, only in areas where the EU has competence
How do national constitutional courts typically react to EU law supremacy?
They sometimes impose limits, citing national constitutional identity
Which legal basis in the EU treaties underpins the principle of supremacy?
Article 4(3) TEU
Which case established that national courts must set aside incompatible national law without waiting for its formal repeal?
Simmenthal
Which case confirmed that national courts cannot declare EU acts invalid?
Foto-Frost
