1. Public procurements may be implemented in a combined, centralised manner by several contracting authorities, which have created a joint central purchasing body or have designated among themselves a central purchasing body, where Article 31 does not provide for the use of a central purchasing body. Rules pertaining to the cooperation of contracting authorities establishing a centralised procurement system shall be laid down in a cooperation agreement.
2. The central purchasing body shall have responsibility for the functioning of the centralised public procurement system. Contracting authorities using the system are responsible for implementing those elements of the public procurement which are conducted by them, in particular for ordering from the dynamic purchasing system operated by the central purchasing body or purchasing on the basis of a framework agreement concluded by the central purchasing body, by reopening or without reopening competition.
3. In centralised public procurement procedures, all written communications between the central purchasing body and the economic operators - including the submission of the request to participate and the submission of the tender - shall be made electronically, subject to the exceptions set out in the separate act of legislation implementing this Act. (This paragraph entered into force on 1 February 2017.)