Judgment of the Court (Second Chamber) of 8 May 2019.#Związek Gmin Zagłębia Miedziowego w Polkowicach v Szef Krajowej Administracji Skarbowej.#Request for a preliminary ruling from the Wojewódzki Sąd Administracyjny we Wrocławiu.#Reference for a preliminary ruling — Common system of value added tax (VAT) — Directive 2006/112/EC — Article 168(a) — Deduction of input tax — Principle of VAT neutrality — Taxable person carrying out both economic and non-economic activities — Goods and services acquired for the purpose of carrying out both transactions subject to VAT and transactions not subject to VAT — Lack of apportionment criteria in national legislation — Principle of fiscal legality.#Case C-566/17.