Primacy of European Union law

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The primacy of European Union law (sometimes referred to as supremacy or precedence of European law^[1]) 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.^[2][3][4] For the European Court of Justice, national courts and public officials must disapply a national norm that they consider not to be compliant with the EU law.

The majority of national courts have generally recognized and accepted this principle, except for the part where European law outranks a member state's constitution. As a result, national constitutional courts have also reserved the right to review the conformity of EU law with national constitutional law.^[5]

Some countries provide that if national and EU law contradict, courts and public officials are required to suspend the application of the national law, bring the question to the national constitutional court and wait until its decision is made. If the norm has been declared to be constitutional, they are automatically obliged to apply the national law.^{[citation needed]} This can create a contradiction between the national constitutional court and the European Court of Justice, like on 7 October 2021 when the Polish Constitutional Tribunal issued a judgment in case K 3/21 challenging the primacy of EU law in certain areas of the Polish legal order.^[6]