45As to the classification, in the main proceedings, of an X card as a ‘single-purpose voucher’, although it is for the referring court alone to rule on such a classification in accordance with the particular circumstances of the case in the main proceedings, the fact remains that the Court of Justice has jurisdiction to elicit from the provisions of that directive, in this case Article 30a(2), the criteria that the referring court may or must apply to that end (see, to that effect, judgment of 3 December 2015, Banif Plus Bank, C‑312/14, EU:C:2015:794, paragraph 51).
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