Case C-460/07: Judgment of the Court (Third Chamber) of 23 April 2009 (Reference for a preliminary ruling from the Verwaltungsgerichtshof, Austria) — Sandra Puffer v Unabhängiger Finanzsenat, Außenstelle Linz (Sixth VAT Directive — Article 17(2) and (6) — Right to deduct input tax — Construction costs of a building allocated to a taxable person’s business — Article 6(2) — Private use of part of the building — Financial advantage compared to non-taxable persons — Equal treatment — State aid under Article 87 EC — Exclusion from right to deduct)