1. Contracting authorities and contracting entities shall verify the conditions for participation relating to the professional and technical ability and the financial and economic standing of the candidates or tenderers, on the basis of self-declarations, reference or references to be submitted as proof in accordance with the requirements specified in the concession notice that shall be non-discriminatory and proportionate to the subject- matter of the concession. The conditions for participation shall be related and proportionate to the need to ensure the ability of the concessionaire to perform the concession, taking into account the subject-matter of the concession and the purpose of ensuring genuine competition.

2. With a view to meeting the conditions for participation laid down in paragraph 1, an economic operator may, where appropriate and for a particular concession, rely on the capacities of other entities, regardless of the legal nature of its links with them. Where an economic operator wants to rely on the capacities of other entities, it shall prove to the contracting authority or the contracting entity that it will have at its disposal, throughout the period of the concession, the necessary resources, for example, by producing a commitment by those entities to that effect. With regard to financial standing, the contracting authority or the contracting entity may require that the economic operator and those entities are jointly liable for the execution of the contract.