52In this respect, while it is common ground that it is not for the Court, in the context of a reference for a preliminary ruling, to rule on the interpretation of provisions of national law or to decide whether the referring court’s interpretation of such provisions is correct, as such an interpretation falls within the exclusive jurisdiction of the national courts (see, to that effect, judgment of 3 July 2019, UniCredit Leasing, C‑242/18, EU:C:2019:558, paragraph 47 and the case-law cited), the fact remains, as the Advocate General noted in point 35 of his Opinion, that the question referred does not concern the interpretation of Polish law but the interpretation of Articles 6(1) and 7(1) of Directive 93/13 and of the principles of effectiveness, legal certainty and proportionality.
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