20In addition, the Court has repeatedly held that if a directive expressly requires Member States to ensure that the necessary measures transposing the directive include a reference to it or that such reference is made when those measures are officially published, it is, in any event, necessary for Member States to adopt a specific measure transposing the directive in question (see, to that effect, judgments of 27 November 1997, Commission v Germany, C‑137/96, EU:C:1997:566, paragraph 8; of 18 December 1997, Commission v Spain, C‑360/95, EU:C:1997:624, paragraph 13; and of 11 June 2015, Commission v Poland, C‑29/14, EU:C:2015:379, paragraph 49).
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