Article 4 1.

Member States shall designate the authority or authorities competent to supervise bids for the purposes of the rules which they make or introduce pursuant to this Directive. The authorities thus designated shall be either public authorities, associations or private bodies recognised by national law or by public authorities expressly empowered for that purpose by national law. Member States shall inform the Commission of those designations, specifying any divisions of functions that may be made. They shall ensure that those authorities exercise their functions impartially and independently of all parties to a bid.