Judgment of the Court (Seventh Chamber) of 27 June 2024.#Gestore dei Servizi Energetici SpA - GSE v Erg Eolica Ginestra Srl and Others.#Reference for a preliminary ruling – Environment – Directive 2009/28/EC – Article 1 – Art. 3(3)(a) – Principles of legal certainty and protection of legitimate expectations – Charter of Fundamental Rights of the European Union – Article 16 – Promotion of the use of energy from renewable sources – Alteration of the scheme applicable – Grant of the aid concerned subject to the conclusion of contracts.#Case C-148/23.