Judgment_paragraph 35 · A v B and Others (C-112/13)

35It follows, first, that, while it might be convenient, in certain circumstances, for the facts of the case to be established and for questions of purely national law to be settled at the time the reference is made to the Court (see Joined Cases 36/80 and 71/80 Irish Creamery Milk Suppliers Association and Others EU:C:1981:62, paragraph 6; Meilicke, C‑83/91, EU:C:1992:332, paragraph 26; and JämO, C‑236/98, EU:C:2000:173, paragraph 31), national courts have the widest discretion in referring matters to the Court if they consider that a case pending before them raises questions involving interpretation of provisions of EU law, or consideration of their validity, necessitating a decision on their part (see, inter alia, Rheinmühlen-Düsseldorf, 166/73, EU:C:1974:3, paragraph 3; Mecanarte, C‑348/89, EU:C:1991:278, paragraph 44; Cartesio, C‑210/06, EU:C:2008:723, paragraph 88; and Melki and Abdeli, EU:C:2010:363, paragraph 41).