Case C-400/18: Judgment of the Court (Second Chamber) of 20 November 2019 (request for a preliminary ruling from the Hof van Cassatie — Belgium) — Infohos v Belgische Staat (Reference for a preliminary ruling — Taxation — Value added tax (VAT) — Sixth Directive 77/388/EEC — Article 13A(1)(f) — Exemptions — Supply of services by independent groups of persons — Services supplied to members and non-members)