75As to those submissions, it is settled case-law that national measures capable of hindering intra-Community trade may be justified by overriding requirements relating to protection of the environment provided that the measures in question are proportionate to the aim pursued (Commission v Denmark, cited above, paragraphs 6 and 9, and Case C-389/96 Aher-Waggon [1998] ECR I-4473, paragraph 20).
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