Case C-176/15: Judgment of the Court (Sixth Chamber) of 30 June 2016 (request for a preliminary ruling from the Tribunal de première instance de Liège — Belgium) — Guy Riskin, Geneviève Timmermans v État belge (Reference for a preliminary ruling — Free movement of capital — Articles 63 and 65 TFEU — Article 4 TEU — Direct taxation — Taxation of dividends — Bilateral convention for the avoidance of double taxation — Third State — Scope)