Case C-41/14: Judgment of the Court (Fourth Chamber) of 26 February 2015 (request for a preliminary ruling from the Cour de cassation — France) — Christie’s France SNC v Syndicat national des antiquaires (Reference for a preliminary ruling — Directive 2001/84/EC — Article 1 — Intellectual property — Sale at auction of original works of art — Resale right for the benefit of the author of an original work of art — Person liable for the resale royalty — Buyer or seller — Derogation by agreement)