Judgment of the Court (Sixth Chamber) of 14 December 2023.#European Commission v Romania.#Environment – Directive 1999/31/EC – Landfill of waste – Obligation to close landfill sites which have not been granted the required permit – Closure procedures – Judgment of the Court establishing a failure to fulfil obligations – Non-compliance – Article 260(2) TFEU – Pecuniary penalties – Penalty payments – Lump sum.#Case C-109/22.