1.The ECB shall specify in the contract notice the selection criteria for assessing a candidate's or tenderer's capacity to perform the contract. The selection criteria shall relate to the candidate's or tenderer's authorisation and suitability to carry out the relevant professional activity, their economic and financial standing, and their technical or professional ability. The selection criteria shall be necessary and proportionate to ensure fair competition and achieve the contract objectives.
2.The ECB may lay down minimum requirements below which it cannot select candidates or tenderers. These minimum requirements shall be specified in the contract notice.
3.The ECB shall specify in the contract notice the documents to be submitted by candidates or tenderers as proof of their financial, economic, technical and professional capacity. It may require, in particular, submission of a European Single Procurement Document as specified in Article 59 of Directive 2014/24/EU, documents held in eCertis, or certificates issued by national databases of approved suppliers. The documentation requested shall not go beyond the subject of the contract and shall take account of the legitimate interests of the suppliers as regards in particular the protection of their technical and business secrets.
4.If, for some exceptional reason which the ECB considers justified, a tenderer or candidate is unable to provide the documents requested, it may prove its capacity by any other means which the ECB considers appropriate and equivalent.
5.A supplier may, where appropriate and for a particular contract, rely on the capacities of another entity, regardless of the legal nature of the links which it has with them. It shall in that case prove to the ECB that it will have the resources necessary for performance of the contract at its disposal, and that the entity itself is eligible to participate in tender procedures in accordance with Article 30. Under the same conditions, a temporary grouping of suppliers may rely on the capacities of participants in the group.