54In that regard, it should be borne in mind that, in the absence of EU legislation in this area, the rules implementing the principle of res judicata are a matter for the national legal order, in accordance with the principle of the procedural autonomy of the Member States, but must be consistent with the principles of equivalence and effectiveness (see, to that effect, the judgment in Fallimento Olimpiclub, C‑2/08, EU:C:2009:506, paragraph 24 and the case-law cited).
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