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by qris 982 days ago
The primacy of European Union law is a legal principle establishing precedence of European Union law over conflicting national laws of EU member states.

The principle was derived from an interpretation of the European Court of Justice, which ruled that European law has priority over any contravening national law, including the constitution of a member state itself.

https://en.wikipedia.org/wiki/Primacy_of_European_Union_law