EU judicial system

This subtopic contains a range of resources on the EU judicial system and the interpretation and enforcement of EU law.

A fundamental principle of EU law is the supremacy of EU law, also known as the primacy of EU law. Under this principle in the event of a conflict between EU law and national law, EU law is supreme and has primacy, irrespective of the source, status or date of the national law in question. Thus, EU law is also supreme over domestic constitutional provisions in the event of any conflict, but this has not been established without some concerns being raised by constitutional courts within the Member States. As originally drafted, the EU Treaties did not include any provision by which the supremacy of EU law was guaranteed. The Court of Justice has played a fundamental role in applying this principle and ensuring the uniform application of EU law across the Member States. For further reading, see Practice Note: The supremacy of EU law.

The European Commission’s role as 'Guardian of the Treaties' is to control the correct application of EU law across EU Member