In cases such as that in the main proceedings, in which VAT connected with a payment made in advance for a future clearly defined taxable supply of goods is immediately and effectively deducted, are the provisions of Article 168(a), in conjunction with Article 65, Article 90(1) and Article 185(1), of Council Directive 2006/112/EC to be consistently interpreted as meaning that, in light of a failure, for objective and/or subjective reasons, to render the principal counter-performance in accordance with the terms and conditions of supply, the right to deduct input tax at the date on which it is exercised must be refused?
C-107/13, 4 March 2013