60Nevertheless, according to the Court’s established case-law, where national legislation falling within an area which has not been completely harmonised at European Union level is applicable without distinction to all persons and undertakings operating in the territory of the Member State concerned, it may, notwithstanding its restrictive effect on the freedom to provide services, be justified where it meets an overriding requirement relating to the public interest and that interest is not already safeguarded by the rules to which the service provider is subject in the Member State in which he is established and in so far as it is appropriate for securing the attainment of the aim which it pursues and does not go beyond what is necessary in order to attain it (see Arblade and Others, paragraphs 34 and 35, and Case C-168/04 Commission v Austria [2006] ECR I-9041, paragraph 37).
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