49Should that situation prove to be well founded and in order to provide the referring court with a useful answer, it must be borne in mind that, in accordance with the principle of procedural autonomy, it is for the national legal order of each Member State to establish procedural rules for actions intended to safeguard the rights of individuals, on condition, however, that those rules are not, in situations covered by EU law, less favourable than in similar domestic situations (principle of equivalence) and that they do not make it excessively difficult or impossible in practice to exercise the rights conferred by EU law (principle of effectiveness) (see, to that effect, judgment of 10 March 2021, Konsul Rzeczypospolitej Polskiej w N., C‑949/19, EU:C:2021:186, paragraph 43 and the case-law cited).
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