Judgment of the Court (Fourth Chamber) of 15 September 2022.#Landkreis Aichach-Friedberg v J. Sch. Omnibusunternehmen and K. Reisen GmbH.#Reference for a preliminary ruling – Public procurement procedures – Directive 2014/24/EU – Point (d) of the first subparagraph of Article 57(4) – Optional grounds for exclusion – Agreements with other economic operators aimed at distorting competition – Directive 2014/25/EU – Article 36(1) – Principles of proportionality and equal treatment of tenderers – Article 80(1) – Use of exclusion grounds and selection criteria provided for under Directive 2014/24/EU – Tenderers which constitute an economic unit and have submitted separate tenders that were neither autonomous nor independent – Need for sufficiently plausible indications to establish an infringement of Article 101 TFEU.#Case C-416/21.