36However, the finding of illegality made by the EU Courts in accordance with Article 277 TFEU does not have erga omnes effect since, while it entails the illegality of the individual contested decision, it leaves the act of general application in the legal order without affecting the legality of other acts which have been adopted pursuant thereto and which were not challenged within the period for appeal (see, to that effect, judgments of 21 February 1974, Kortner and Others v Council and Others, 15/73 to 33/73, 52/73, 53/73, 57/73 to 109/73, 116/73, 117/73, 123/73, 132/73 and 135/73 to 137/73, EU:C:1974:16, paragraphs 37 and 38, and of 27 October 2016, ECB v Cerafogli, T‑787/14 P, EU:T:2016:633, paragraph 53).