18In that regard, it must be noted that, according to settled case-law, which is now reflected in Article 94 of the Rules of Procedure of the Court of Justice, the need to provide an interpretation of EU law which will be of use to the national court makes it necessary for the national court to define the factual and legal context of the questions it is asking or, at the very least, to explain the factual circumstances on which those questions are based. Those requirements are of particular importance in the area of competition, where the factual and legal situations are often complex (judgment of 5 March 2019, Eesti Pagar, C‑349/17, EU:C:2019:172, paragraph 49).
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