53It is clear from case-law that the extension of an existing aid creates a new aid which is distinct from the aid which was extended and the amendment of the duration of an existing aid should also be regarded as a new aid (see, to that effect, judgments of 4 December 2013 in Commission v Council, C‑111/10, ECR, EU:C:2013:785, paragraph 58; and Commission v Council, C‑121/10, ECR, EU:C:2013:784, paragraph 59 and the case-law cited; judgment of 6 March 2002 in Diputación Foral de Álava and Others v Commission, Τ-127/99, T‑129/99 and T‑148/99, ECR, EU:T:2002:59, paragraph 175).