3.1 Verification of non-exclusion  3.2 Selection criteria  3.2.1 Declaration and evidence  All tenderers must provide a declaration on honour (see section 4. Annexes), signed and dated by  an authorised representative, stating that they are not in one of the situations of exclusion listed  in that declaration on honour. In case of joint tender, each member of the group must provide a declaration on honour signed  by an authorised representative. In case of subcontracting, all subcontractors whose capacity is necessary to fulfil the selection  criteria must provide a declaration on honour signed by an authorised representative.  ECDC reserves the right to verify whether the successful tenderer(s) is in one of the situations of  exclusion by requiring the supporting documents listed in the declaration of honour. The successful tenderer(s) must provide the documents mentioned as supporting evidence in the  declaration on honour before signature of the contract and within a deadline given by ECDC. This  requirement applies to each member of the group in case of joint tender and to all subcontractors  whose capacity is necessary to fulfil the selection criteria.  The obligation to submit supporting evidence does not apply to international organisations. A tenderer (or a member of the group in case of joint tender, or a subcontractor) is not required  to submit the documentary evidence if it has already been submitted for another procurement  procedure and provided the documents were issued not more than one year before the date of  their request by ECDC and are still valid at that date. In such cases, the tenderer must declare on  its honour that the documentary evidence has already been provided in a previous procurement  procedure, indicate the reference of the procedure and confirm that that there has been no change  in its situation.  Tenderers must prove their legal, regulatory, economic, financial, technical and professional  capacity to carry out the work subject to this procurement procedure. The tenderer may rely on the capacities of other entities, regardless of the legal nature of the  links which it has with them. It must in that case prove to ECDC that it will have at its disposal  the resources necessary for performance of the contract, for example by producing an undertaking  on the part of those entities to place those resources at its disposal.  The tender must include the proportion of the contract that the tenderer intends to subcontract.  The tenderers (and each member of the group in case of joint tender) and subcontractors whose  capacity is necessary to fulfil the selection criteria must provide the declaration on honour (see  section 4. Annexes), signed and dated by an authorised representative, stating that they fulfil the  selection criteria applicable to them individually. For the criteria applicable to the tenderer as a  whole the tenderer (sole tenderer or leader in case of joint tender) must provide the declaration  on honour stating that the tenderer, including all members of the group in case of joint tender  and including subcontractors if applicable, fulfils the selection criteria for which a consolidated  assessment will be carried out. 21 