54That being said, the principle that national law must be interpreted in conformity with EU law has certain limits. Thus, the obligation on a national court to refer to the content of EU law when interpreting and applying the relevant rules of domestic law is limited by general principles of law, including legal certainty, and cannot serve as the basis for an interpretation of national law contra legem (see, to that effect, judgment of 13 July 2016, Pöpperl, C‑187/15, EU:C:2016:550, paragraph 44 and the case-law cited).
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