84It must be added that only the Court of Justice may, in exceptional cases, for overriding considerations of legal certainty, allow temporary suspension of the ousting effect of a rule of EU law with respect to national law that is contrary thereto. If national courts had the power to give provisions of national law primacy in relation to EU law contravened by those provisions, even temporarily, the uniform application of EU law would be undermined (judgment of 29 July 2019, Inter-Environnement Wallonie and Bond Beter Leefmilieu Vlaanderen, C‑411/17, EU:C:2019:622, paragraph 177 and the case-law cited).
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