45As regards Mr Alba Aguilera and others’ challenge to the admissibility of the first ground of appeal on the ground that it is new and alters the subject matter of the dispute before the General Court, which did not relate to whether the EEAS was obliged to adopt general implementing provisions for Article 10 of Annex X to the Staff Regulations pursuant to the third subparagraph of Article 1 of that annex, but only to whether the EEAS complied with that obligation and whether the decisions of 17 December 2013 and 3 December 2014 constituted such general implementing provisions or could be equated to them, it should be recalled that the Court’s jurisdiction, in an appeal, is limited to a review of the findings of law on the pleas argued at first instance. A party cannot therefore put forward for the first time before the Court of Justice a plea in law which it could have raised before the General Court but did not do so, since that would be to authorise it to bring before the Court of Justice, whose jurisdiction in appeals is limited, a case of wider ambit than that which came before the General Court (see, to that effect, judgments of 1 June 1994, Commission v Brazzelli Lualdi and Others, C‑136/92 P, EU:C:1994:211, paragraph 59, and of 18 February 2016, Council v Bank Mellat, C‑176/13 P, EU:C:2016:96, paragraph 116 and the case-law cited).
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