Case C-62/12: Judgment of the Court (First Chamber) of 13 June 2013 (request for a preliminary ruling from the Administrativen sad — Varna — Bulgaria) — Galin Kostov v Direktor na Direktsia ‘Obzhalvane i upravlenie na izpalnenieto’ — Varna pri Tsentralno upravlenie na Natsionalnata agentsia za prihodite (Common system of value added tax — Directive 2006/112/EC — Article 9(1) — Concept of ‘taxable person’ — Natural person — Taxable supply of a service — Occasional supply — Unconnected with a registered professional activity subject to VAT — Self-employed bailiff)