Joined Cases C-618/11, C-637/11 and C-659/11: Judgment of the Court (Third Chamber) of 5 December 2013 (requests for a preliminary ruling from the Supremo Tribunal Administrativo — Portugal) — TVI Televisão Independente SA v Fazenda Pública (Taxation — VAT — Sixth Directive 77/388/EEC — Article 11(A)(1)(a), (2)(a) and (3)(c) — Directive 2006/112/EC — Article 73, point (a) of the first paragraph of Article 78 and point (c) of the first paragraph of Article 79 — Taxable amount for the VAT payable on commercial advertising screening services — Commercial advertising screening tax)