1. Where the use of electronic means of communication is required, contracting authorities may require tenders to be presented in the format of an electronic catalogue or to include an electronic catalogue.

Member States may render the use of electronic catalogues mandatory in connection with certain types of procurement.

Tenders presented in the form of an electronic catalogue may be accompanied by other documents, completing the tender.

2. Electronic catalogues shall be established by the candidates or tenderers with a view to participating in a given procurement procedure in accordance with the technical specifications and format established by the contracting authority.

Furthermore, electronic catalogues shall comply with the requirements for electronic communication tools as well as with any additional requirements set by the contracting authority in accordance with Article 22.

3. Where the presentation of tenders in the form of electronic catalogues is accepted or required, contracting authorities shall:

(a) state so in the contract notice or in the invitation to confirm interest where a prior information notice is used as a means of calling for competition;