19However, it clear from settled case-law that, where such domestic legislation is applicable to all persons and undertakings operating in the territory of the Member State in which the service is provided, it may be justified where it meets overriding requirements relating to the public interest in so far as that interest is not safeguarded by the rules to which the provider of such a service 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 objective which it pursues and does not go beyond what is necessary in order to attain it (see, in particular, Case 279/80Webb [1981] ECR 3305, paragraph 17; Case C-205/99Analir and Others [2001] ECR I-1271, paragraph 25, and Mazzoleni and ISA, cited above, paragraph 25).