Opinion of Advocate General Campos Sánchez-Bordona delivered on 17 September 2020.#RTS infra BVBA and Aannemingsbedrijf Norré-Behaegel v Vlaams Gewest.#Request for a preliminary ruling from the Raad van State.#Reference for a preliminary ruling – Public procurement contracts – Directive 2014/24/EU – Article 57(6) – Optional grounds for exclusion – Measures taken by the economic operator to demonstrate its reliability despite the existence of an optional ground for exclusion – Obligation of the economic operator to provide evidence of such measures on its own initiative – Direct effect.#Case C-387/19.