Judgment of the Court (First Chamber) of 8 June 2023.#Fastweb SpA and Others v Autorità per le Garanzie nelle Comunicazioni.#Request for a preliminary ruling from the Consiglio di Stato.#Reference for a preliminary ruling – Electronic communications networks and services – Directives 2002/19/EC, 2002/20/EC, 2002/21/EC et 2002/22/EC – Article 49 TFEU – Freedom of establishment – Article 56 TFEU – Freedom to provide services – National legislation granting the national regulatory authority the power to impose on telephony service providers a minimum time frame for the renewal of offers and a minimum time frame for billing – Consumer protection – Principle of proportionality – Principle of equal treatment.#Case C-468/20.