28Every citizen of the Union may therefore rely on the prohibition of discrimination on grounds of nationality laid down in Article 18 TFEU, provided for in other Treaty provisions and in Article 24 of Directive 2004/38, in all situations falling within the scope ratione materiae of European Union law. Those situations include the exercise of the fundamental freedoms conferred by inter alia Article 45 TFEU and those relating to the exercise of the freedom conferred by Article 21 TFEU to move and reside within the territory of the Member States (see, inter alia, Case C-85/96 Martínez Sala [1998] ECR I-2691, paragraph 63; Grzelczyk, paragraphs 32 and 33; Case C-209/03 Bidar [2005] ECR I-2119, paragraphs 32 and 33; and Case C-75/11 Commission v Austria [2012] ECR, paragraph 39).
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