47Likewise, where the Commission has adduced sufficient evidence to show that a Member State s authorities have developed a repeated and persistent practice which is contrary to the provisions of a directive, it is incumbent on that Member State to challenge in substance and in detail the information produced and the consequences flowing therefrom (see, by analogy, Case 272/86 Commission v Greece, cited above, paragraph 21, and San Rocco, paragraphs 84 and 86).
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