Case C-332/14: Judgment of the Court (Fourth Chamber) of 9 June 2016 (request for a preliminary ruling from the Bundesfinanzhof — Germany) — Wolfgang und Dr. Wilfried Rey Grundstücksgemeinschaft GbR v Finanzamt Krefeld (Reference for a preliminary ruling — Taxation — Value added tax — Directive 77/388/EEC — Third subparagraph of Article 17(5) — Field of application — Deduction of input tax — Goods and services used for both taxable and exempt transactions (mixed-use goods and services) — Determination of the assignation of goods and services purchased for the construction, use, conservation and maintenance of a building that serves to carry out, in part, transactions in respect of which VAT is deductible and, in part, transactions in respect of which VAT is not deductible — Amendment of the national legislation laying down the method of calculating the deductible proportion — Article 20 — Adjustment of deductions — Legal certainty — Legitimate expectations)