Judgment of the Court (Fifth Chamber) of 14 October 2021.#Viesgo Infraestructuras Energéticas SL v Administración General del Estado and Others.#Request for a preliminary ruling from the Tribunal Supremo.#Reference for a preliminary ruling – Common rules for the internal market in electricity – Directive 2009/72/EC – Article 3(2) and (6) – Imposition of public service obligations – Financing of a regulated discount for the purpose of the protection of vulnerable consumers – Requirements of transparency and non-discrimination.#Case C-683/19.