Article 4 6.

This Directive shall not affect the power of the Member States to designate judicial or other authorities responsible for dealing with disputes and for deciding on irregularities committed in the course of bids or the power of Member States to regulate whether and under which circumstances parties to a bid are entitled to bring administrative or judicial proceedings. In particular, this Directive shall not affect the power which courts may have in a Member State to decline to hear legal proceedings and to decide whether or not such proceedings affect the outcome of a bid. This Directive shall not affect the power of the Member States to determine the legal position concerning the liability of supervisory authorities or concerning litigation between the parties to a bid.