68It should be borne in mind that, under the second sentence of Article 170(1) of the Rules of Procedure of the Court of Justice, the subject matter of the proceedings before the General Court may not be changed in the appeal. In addition, as is apparent from settled case-law, to allow a party to put forward for the first time before the Court of Justice a ground for complaint which it did not raise before the General Court 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. In an appeal, the Court’s jurisdiction is thus confined to examining the assessment by the General Court of the pleas and arguments discussed before it (judgment of 17 December 2020, De Masi and Varoufakis v ECB, C‑342/19 P, EU:C:2020:1035, paragraph 34 and the case-law cited).
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