Case C-250/18: Judgment of the Court (Eighth Chamber) of 2 May 2019 — European Commission v Republic of Croatia (Failure of a Member State to fulfil obligations — Directive 2008/98/EC — Waste treatment — Article 5(1) — Stone aggregate which does not fall within the concept of a ‘by-product’ — Article 13 — Obligation of Member States to ensure protection of human health and of the environment — Article 15(1) — Obligation to have waste treated by the holder or other designated persons)