Europol Public Information 3.2.2. Assessment of joint requests to participate/ joint tenders  3.2.3. Groups of economic operators - contract implementation  3.3. Subcontracting General Guidance on Europol Procurement Procedures  Page  10  of  20 The following shall not be considered subcontracting: The candidate/tenderer may subcontract the tasks specified in the procurement documents to  other economic operators, as long as the supplies and/or services are provided in accordance  with the specified requirements and have no impact on the prices proposed in its financial  tender. Subcontracting is the situation where the contractor enters into legal commitments with other  economic operators which will perform part of the contract on its behalf. The contractor retains  full liability towards Europol for performance of the contract as a whole.  The composition of the group and the allocation of tasks among the members of the group shall  not be altered without prior written information to Europol. The Group Leader – duly authorised by the other members of the group, via power of attorney –  will be entitled to sign any contractual documents; it shall act as a single point of contact with  Europol in connection with the services to be provided under the contract; it shall co-ordinate the  provision of the services by the group members to Europol; it shall guarantee a proper  administration of the contract.  Once the contract has entered into force, all members of the group shall be jointly and severally  liable towards Europol for the performance of the contract as a whole. Europol will disregard any such statement contained in a joint tender, and it reserves the right to  reject such tenders without further evaluation, on the grounds that they do not comply with the  procurement documents.  are incompatible with the principle of joint and several liability. Since all members of the consortium are jointly and severally liable towards Europol for the  performance of the contract, statements included in the joint tender saying, for instance:  Compliance with minimum requirements and award criteria will be assessed in relation to the  joint tender.  The selection criteria for the economic and financial capacity and technical and professional  capacity will be assessed in relation to the combined capacities of all members of the group, as a  whole, unless specified differently in the Invitation.  Access to market and exclusion criteria will be assessed in relation to each member of the group  individually.  Joint requests to participate / joint tenders submitted by groups of economic operators will be  assessed as follows:  • that a separate contract should be signed with each member of the group if the joint  offer is successful, • that each member of the group will be responsible only for a specific part of the contract,  or 