Case C-210/20: Judgment of the Court (Ninth Chamber) of 3 June 2021 (request for a preliminary ruling from the Consiglio di Stato — Italy) — Rad Service Srl Unipersonale, Cosmo Ambiente Srl, Cosmo Scavi Srl v Del Debbio SpA, Gruppo Sei Srl, Ciclat Val di Cecina Soc. Coop., DAF Costruzioni stradali Srl (Reference for a preliminary ruling — Public procurement of service, supply and works contracts — Directive 2014/24/EU — Conduct of the tendering procedure — Choice of participants and award of contracts — Article 63 — Tenderer relying on the capacities of another entity in order to meet the requirements of the contracting authority — Article 57(4), (6) and (7) — Untruthful declarations submitted by that entity — Exclusion of that tenderer without requiring or permitting it to replace that entity — Principle of proportionality)