representative of such an entity, and the supporting evidence that those other entities have the respective resources. 

If the contract is awarded to a tenderer intending to rely on another entity to meet the minimum levels of economic and financial capacity, the Contracting authority may require the entity to sign the contract or, alternatively, to provide a joint and several first-call financial guarantee for the performance of the contract. 

With regard to technical and professional selection criteria, a candidate may only rely on the capacities of other entities where the latter will perform the works or services for which these capacities are required. 

 Relying on the capacities of other entities is only necessary when the capacity of the tenderer is not sufficient to fulfil the required minimum levels of capacity. Abstract commitments that other entities will put resources at the disposal of the tenderer will be disregarded. 

