Case C-250/10: Judgment of the Court (Fourth Chamber) of 21 December 2011 (reference for a preliminary ruling from the Finanzgericht Düsseldorf — Germany) — Haltergemeinschaft LBL GbR v Hauptzollamt Düsseldorf (Directive 2003/96/EC — Taxation of energy products and electricity — Article 14(1)(b) — Exemption of energy products used as fuel for the purpose of air navigation — Fuel provided by a person chartering out an aircraft used by charterers of the aircraft for their flights for purposes other than the supply of air services for consideration)