50With regard to the time when that limitation period began to run, it must be recalled that, according to the case-law of the Court, where none of the EU rules governing the matter are applicable ratione temporis, it is for the legal system of each Member State to lay down the detailed rules governing the exercise of the right to claim compensation for the harm resulting from an infringement of Articles 101 and 102 TFEU, including those on limitation periods, provided that the principles of equivalence and effectiveness are observed, that latter principle requiring that the rules applicable to actions for safeguarding rights which individuals derive from the direct effect of EU law not make it practically impossible or excessively difficult to exercise rights conferred by EU law (see, to that effect, judgment of 28 March 2019, Cogeco Communications, C‑637/17, EU:C:2019:263, paragraphs 42 and 43).
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