52According to settled case-law, where, in the absence of EU rules governing the matter, it is for the legal system of each Member State to designate the courts and tribunals having jurisdiction and to lay down the detailed procedural rules governing actions for safeguarding rights which individuals derive from EU law, those detailed rules must not be less favourable than those governing similar domestic actions (principle of equivalence) and must not make it impossible in practice or excessively difficult to exercise rights conferred by EU law (principle of effectiveness) (judgment in Gruber, C‑570/13, EU:C:2015:231, paragraph 37 and the case-law cited). As far as the latter principle is concerned, it should also be recalled that Article 47 of the Charter of Fundamental Rights of the European Union enshrines the right to an effective remedy before an impartial tribunal (see, to that effect, judgment in Unibet, C‑432/05, EU:C:2007:163, paragraph 37 and the case-law cited).
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