43In that regard, it should be borne in mind that it follows from the spirit of cooperation which must prevail in the operation of the preliminary reference procedure that it is essential that the national court set out in its order for reference the precise reasons why it considers that a reply to its questions concerning the interpretation of certain provisions of EU law is necessary to enable it to give judgment in the dispute that has been brought before it (judgment of 27 February 2018, Associação Sindical dos Juízes Portugueses, C‑64/16, EU:C:2018:117, paragraph 20 and the case-law cited).
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