23In that regard, it should be recalled that national courts have the widest discretion in referring matters to the Court if they consider that a case pending before them raises questions involving the interpretation of provisions of EU law, or consideration of their validity, which are necessary for the resolution of the case before them and, in particular, that they are free to exercise that discretion at whatever stage of the proceedings they consider appropriate (judgment of 14 November 2018, Memoria and Dall’Antonia, C‑342/17, EU:C:2018:906, paragraph 33 and the case-law cited).