43In addition, in providing only one example of such cases, that circular does not inform potential acquirers about the specific and objective situations in which a derogation from the residence requirement will be granted or refused. Such vagueness does not enable individuals to become familiar with the extent of their rights and obligations resulting from Article 56 EC, so that a system of that nature must be regarded as being contrary to the principle of legal certainty (see, to that effect, Case C-483/99 Commission v France [2002] ECR I-4781, paragraph 50, and Case C-463/00 Commission v Spain [2003] ECR I-4581, paragraphs 74 and 75). In any event, it does not appear that that system has taken into account the situation of citizens of the Union who are not resident in Denmark in order to avoid discriminatory application.
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