Judgment of the Court (Fourth Chamber) of 18 June 2020.#Proceedings brought by Porin kaupunki.#Request for a preliminary ruling from the Korkein hallinto-oikeus.#Reference for a preliminary ruling – Public procurement – Directive 2004/18/EC – Article 1(2)(a) – Public procurement in the field of transport services – Cooperation agreement between municipalities regarding the organisation and provision of social and healthcare services based on the model of the ‘responsible municipality’ under Finnish law – Transfer of responsibility for the organisation of services to one of the municipalities in the area covered by the cooperation concerned – ‘In-house’ contract – Award of services to a company wholly owned by the responsible municipality without a call for competition.#Case C-328/19.