Case C-587/22: Judgment of the Court (Seventh Chamber) of 7 December 2023 — European Commission v Hungary (Failure of a Member State to fulfil obligations — Environment — Directive 91/271/EEC — Treatment of urban waste water — Article 3 — Collecting systems — Individual systems — Article 4 — Secondary or equivalent treatment — Article 5 — Sensitive areas — Article 15 — Monitoring of discharges)