Judgment_paragraph 29 · Federazione nazionale delle imprese elettrotecniche ed elettroniche (Anie) and Others and Athesia Energy Srl and Others v Ministero dello Sviluppo Economico and Gestore dei servizi energetici (GSE) SpA (C-798/18, C-799/18)

29Moreover, it should be emphasised that, as can be seen from settled case-law, where Member States adopt, in that way, measures by which they implement EU law, they are required to respect the general principles of that law, which include the principles of legal certainty and of the protection of legitimate expectations (see, to that effect, judgment of 11 July 2019, Agrenergy and Fusignano Due, C‑180/18, C‑286/18 and C‑287/18, EU:C:2019:605, paragraph 28 and the case-law cited).