Judgment_paragraph 96 · Inuit Tapiriit Kanatami and Others v European Parliament and Council of the European Union (C-583/11 P)

96In that regard, it must be borne in mind that where a national court or tribunal considers that one or more arguments for invalidity of a European Union act, put forward by the parties or, as the case may be, raised by it of its own motion, are well founded, it is incumbent upon it to stay proceedings and to make a reference to the Court for a preliminary ruling on the act’s validity, the Court alone having jurisdiction to declare a European Union act invalid (Case C-344/04 IATA and ELFAA [2006] ECR I-403, paragraphs 27 and 30 and the case-law cited).