Case C-399/17: Judgment of the Court (First Chamber) of 14 March 2019 — European Commission v Czech Republic (Failure of a Member State to fulfil obligations — Regulation (EC) No 1013/2006 — Shipment of waste — Refusal of the Czech Republic to ensure the take-back of the mixture TPS-NOLO (Geobal) shipped from that Member State to Poland — Existence of waste — Burden of proof — Proof)