Case C-276/14: Judgment of the Court (Grand Chamber) of 29 September 2015 (request for a preliminary ruling from the Naczelny Sąd Administracyjny — Poland) — Gmina Wrocław v Minister Finansów (Reference for a preliminary ruling — Value added tax — Directive 2006/112/EC — Article 9(1) — Article 13(1) — Taxable persons — Interpretation of the word ‘independently’ — Municipal body — Economic activities carried out by an organisational entity of a municipality other than as a public authority — Whether such an entity may be regarded as a ‘taxable person’ within the meaning of the provisions of Directive 2006/112 — Articles 4(2) and 5(3) TEU)