The complaint concerned the Piraeus Port investment programme in Greece. The complaint focused on the expansion of basic port infrastructure for the reception and service of cruise ships, which are to be funded by the European Regional Development Fund (ERDF) Programme. The main allegations of the complaint were: i. Deficient environmental decision-making, especially a limited scope of and expired Approval of Environmental Terms (AEPO), which did not cover the additional berths for cruise liners. The complainant alleged that the Piraeus Port Master Plan did not cover the disputed overall project components and were not subject to the Strategic Environmental Assessment (SEA). ii. Unassessed and unaddressed significant negative environmental impacts caused by the development in the Southern Piraeus passenger port area, especially in terms of a potential flooding phenomenon, air pollution caused by cruise ships and surface transport, unaccounted health effects stemming from hazardous waste treatment and the use of caissons to dispose the hazardous dredged material. iii. State aid linked to the allocation of public funding (ERDF) to the developer and a waiver provided by the State Council decision Ref.1076/2019 in breach of the Greek and EU law on procurement.