36In this respect, in accordance with the principle of loyal cooperation now enshrined in Article 4(3) TEU, the detailed procedural rules governing actions for safeguarding an individual’s rights under European Union law must be no less favourable than those governing similar domestic actions (principle of equivalence) and must not render impossible in practice or excessively difficult the exercise of rights conferred by European Union law (principle of effectiveness) (see, in particular, to that effect, Case 33/76 Rewe-Zentralfinanz and Rewe-Zentral [1976] ECR 1989, paragraph 5; Case C-312/93 Peterbroeck [1995] ECR I-4599, paragraph 12; and Case C-416/10 Križan and Others [2013] ECR, paragraph 85).
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