67It is settled case-law that an exception to the principle of the free movement of goods may be justified under Article 30 EC only if the national authorities show that it is necessary in order to attain one or more objectives mentioned in that article and that it is in conformity with the principle of proportionality (Case 227/82 Van Bennekom [1983] ECR 3883, paragraph 40, and Case C-358/95 Morellato [1997] ECR I-1431, paragraph 14). Such justification can only be specifically demonstrated by reference to the circumstances of the case.
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