18The referring court must also set out the precise reasons why it is unsure as to the interpretation of certain provisions of EU law and why it considers it necessary to refer questions to the Court for a preliminary ruling. It is also essential that the national court should provide at the very least some explanation of the reasons for the choice of the provisions of EU law which it seeks to have interpreted and of the link which it establishes between those provisions and the national legislation applicable to the proceedings pending before it (order of 21 June 2018, Idroenergia, C‑166/18, not published, EU:C:2018:476, paragraph 13 and the case-law cited).
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