Article 27 4.

Member States may operate their own available systems or software allowing for the preparation and processing of the information and documents referred to in paragraph 1 by competent authorities, authorities involved in inspections and, where appropriate, economic operators in the Member States and for the electronic submission and exchange of information and documents referred to in paragraph 1. The Member States shall ensure that those systems and software are interoperable with the central system referred to in paragraph 3, are operated in accordance with the requirements and rules laid down in the implementing acts adopted by the Commission pursuant to paragraph 5 and allow for the exchange of information and documents via the hub of the central system in real time.