Without prejudice to the provisions of article L. 2141-13, the composition of the consortium may not be changed between the date on which applications are submitted and the date on which the contract is signed. However, in the event of a company restructuring operation, in particular a takeover, merger or acquisition, or if the consortium provides proof that one of its members is unable to perform its task for reasons for which it is not responsible, it may ask the purchaser for authorisation to continue to take part in the award procedure by proposing, where appropriate, for acceptance by the purchaser, one or more new members of the consortium, subcontractors or affiliated companies. The purchaser will decide on this request after examining the capacity of all the members of the grouping thus transformed and, where applicable, of the subcontractors or affiliated companies presented for acceptance, in the light of the conditions for participation which it has defined.