25Although, as Community law stands at present, the rules governing a person's surname are matters coming within the competence of the Member States, the latter must none the less, when exercising that competence, comply with Community law (see, by way of analogy, Case C-336/94 Dafeki [1997] ECR I-6761, paragraphs 16 to 20), in particular the Treaty provisions on the freedom of every citizen of the Union to move and reside in the territory of the Member States (see, inter alia, Case C-135/99 Elsen [2000] ECR I-10409, paragraph 33).
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