Case C-284/11: Judgment of the Court (Second Chamber) of 12 July 2012 (reference for a preliminary ruling from the Varhoven administrativen sad — Bulgaria) — EMS-Bulgaria Transport OOD v Direktor na Direktsia ‘Obzhalvane i upravlenie na izpalnenieto’ Plovdiv (VAT — Directive 2006/112/EC — Right to deduct — Limitation period for the exercise of the right to deduct VAT — Principle of effectiveness — Refusal of the right to deduct VAT — Principle of fiscal neutrality)