1. In the case of particularly complex contracts, Member States may provide that where contracting authorities/entities consider that use of the restricted procedure or the negotiated procedure with publication of a contract notice will not allow the award of the contract, the latter may make use of the competitive dialogue in accordance with this Article.

A contract shall be awarded on the sole basis of the award criterion for the most economically advantageous tender.

2. Contracting authorities/entities shall publish a contract notice setting out their needs and requirements, which they shall define in that notice and/or in a descriptive document.

3. Contracting authorities/entities shall open with the candidates selected in accordance with the relevant provisions of Articles 38 to 46, a dialogue, the aim of which shall be to identify and define the means best suited to satisfying their needs. They may discuss all aspects of the contract with the chosen candidates during this dialogue.