Judgment of the Court (Fifth Chamber) of 7 November 2019.#Asociación Española de la Industria Eléctrica (UNESA) and Others v Administración General del Estado.#Requests for a preliminary ruling from the Tribunal Supremo.#Reference for a preliminary ruling — Polluter pays principle — Directive 2000/60/EC — Article 9(1) — Recovery of the costs of water services — Common rules for the internal market in electricity — Directive 2009/72/EC — Article 3(1) — Principle of non-discrimination — Article 107(1) TFEU — State aid — Tax on the use of inland waters for the production of electricity — Tax imposed only on hydroelectricity producers operating on inter-communities river basins.#Joined Cases C-105/18 to C-113/18.