42It follows from the foregoing that if the applicable domestic rules of procedure provide the possibility, under certain conditions, for a national court to go back on a decision having the authority of res judicata in order to render the situation compatible with national law, that possibility must prevail if those conditions are met, in accordance with the principles of equivalence and effectiveness, so that the situation at issue is brought back into line with EU law (judgment of 6 October 2015, Târşia, C‑69/14, EU:C:2015:662, paragraph 30 and the case-law cited).
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