34Second, as regards the principle of effectiveness, the Court has previously held that every case in which the question arises whether a national procedural provision makes the application of EU law impossible or excessively difficult must be analysed by reference to the role of that provision in the procedure, its progress and its special features, viewed as a whole, before the various national bodies. In that context, it is necessary to take into consideration, where relevant, the principles which lie at the basis of the national legal system, such as the protection of the rights of the defence, the principle of legal certainty and the proper conduct of the proceedings (see, to that effect, judgments in Asociación de Consumidores Independientes de Castilla y León, C‑413/12, EU:C:2013:800, paragraph 34, and Pohotovosť, C‑470/12, EU:C:2014:101, paragraph 51 and case-law cited).
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