1. Member States shall ensure that all communication and information exchange under this Directive, in particular electronic submission, are performed using electronic means of communication in accordance with the requirements of this Article. The tools and devices to be used for communicating by electronic means, as well as their technical characteristics, shall be non-discriminatory, generally available and interoperable with the ICT products in general use and shall not restrict economic operators' access to the procurement procedure.

Notwithstanding the first subparagraph, contracting authorities shall not be obliged to require electronic means of communication in the submission process in the following situations:

(a) due to the specialised nature of the procurement, the use of electronic means of communication would require specific tools, devices or file formats that are not generally available or supported by generally available applications;

(b) the applications supporting file formats that are suitable for the description of the tenders use file formats that cannot be handled by any other open or generally available applications or are under a proprietary licensing scheme and cannot be made available for downloading or remote use by the contracting authority;