Case C-376/18: Judgment of the Court (Fifth Chamber) of 12 December 2019 (request for a preliminary ruling from the Najvyšší súd Slovenskej republiky — Slovak Republic) — Slovenské elektrárne a.s. v Úrad pre vybrané hospodárske subjekty, formerly Daňový úrad pre vybrané daňové subjekty (Reference for a preliminary ruling — Admissibility — Common rules for the internal market in electricity — Directive 2009/72/EC — Scope — Article 3 — Objectives — Principle of non-discrimination — Special levy on the revenue of entities that are holders of an authorisation to carry on activity in regulated sectors — Electricity sector)