Case C-416/21: Judgment of the Court (Fourth Chamber) of 15 September 2022 (request for a preliminary ruling from the Bayerisches Oberstes Landesgericht — Germany) — Landkreis A.-F. 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)