Case C-492/17: Judgment of the Court (Fourth Chamber) of 13 December 2018 (request for a preliminary ruling from the Landgericht Tübingen — Germany) — Südwestrundfunk v Tilo Rittinger, Patrick Wolter, Harald Zastera, Dagmar Fahner, Layla Sofan, Marc Schulte (Reference for a preliminary ruling — State aid — Article 107(1) TFEU — Article 108(3) TFEU — Public broadcasting institutions — Financing — Legislation of a Member State under which all adults possessing a dwelling within the country are required to pay a contribution to public broadcasters)