Judgment_paragraph 50 · Dimosia Epicheirisi Ilektrismou AE (DEI) and European Commission vAlouminion tis Ellados VEAE (C-590/14 P)

50In those circumstances, and as held by the Court in the judgments of 4 December 2013, Commission v Council (C‑121/10, EU:C:2013:784, paragraph 59) and of 4 December 2013, Commission v Council (C‑111/10, EU:C:2013:785, paragraph 58), extension of the duration of existing aid must be considered to be an alteration of existing aid and therefore, in accordance with Article 1(c) of Regulation No 659/1999, constitutes new aid.