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In page European Union:

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In 2009, the Lisbon Treaty gave legal effect to the Charter of Fundamental Rights of the European Union. The charter is a codified catalogue of fundamental rights against which the EU's legal acts can be judged. It consolidates many rights which were previously recognised by the Court of Justice and derived from the "constitutional traditions common to the member states."[3] The Court of Justice has long recognised fundamental rights and has, on occasion, invalidated EU legislation based on its failure to adhere to those fundamental rights.[4]