70Even if, in practice, the authorities of a Member State do not apply a national provision which is at variance with Community law, the principle of legal certainty nevertheless requires that that provision be amended (see, to that effect, Case C-358/98 Commission v Italy [2000] ECR I-1255, paragraphs 16 and 17, and Case C-160/99 Commission v France [2000] ECR I-6137, paragraph 22).
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