Case C-113/19: Order of the Court (Sixth Chamber) of 26 March 2020 (request for a preliminary ruling from the Cour administrative — Luxembourg) — Luxaviation SA v Ministre de l’Environnement (Reference for a preliminary ruling — Environment — Scheme for greenhouse gas emission allowance trading — Directive 2003/87/EC — Penalty for excess emissions — No exculpatory cause in the event of actual holding of non-surrendered allowances, unless force majeure — No possibility of varying the amount of the penalty — Proportionality — Articles 20, 41, 47 and Article 49(3) of the Charter of Fundamental Rights of the European Union — Principle of the protection of legitimate expectations)