20In that regard, it must be borne in mind that, according to the Court’s settled case-law, if the judicial review guaranteed by Article 47 of the Charter is to be effective, on the one hand, the person concerned must be able to ascertain the reasons upon which the decision taken in relation to him is based, either by reading the decision itself or by requesting and obtaining notification of those reasons, so as to make it possible for him to defend his rights in the best possible conditions and to decide, with full knowledge of the relevant facts, whether there is any point in his applying to the court with jurisdiction. On the other, the court with jurisdiction must have the power to require the authority concerned to provide that information, in order to put that court fully in a position in which it may carry out the review of the lawfulness of the national decision in question (see to that effect, judgment in ZZ, EU:C:2013:363, paragraph 53 and the case-law cited).
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