Contract number: [ complete ]  FWC conditions of October 2018  If a party requests written confirmation of an e-mail within a reasonable time, the other party  must provide an original signed paper version of the communication as soon as possible.  (d) be sent by mail, email or, for the documents specified in the special conditions, via  e- PRIOR . The parties agree that any communication made by email has full legal effect and is admissible  as evidence in judicial proceedings.  II.5.2. Date of communications by mail and email  Any communication is deemed to have been made when the receiving party receives it, unless  this FWC contract refers to the date when the communication was sent.  E-mail is deemed to have been received by the receiving party on the day of dispatch of that e- mail, provided that it is sent to the e-mail address indicated in Article I.8. The sending party  must be able to prove the date of dispatch. In the event that the sending party receives a non- delivery report, it must make every effort to ensure that the other party actually receives the  communication by email or mail. In such a case, the sending party is not held in breach of its  obligation to send such communication within a specified deadline.  Mail sent to the contracting authority is deemed to have been received by the contracting  authority on the date on which the department responsible referred to in Article I.8 registers it. Formal notifications  are considered to have been received by the receiving party on the date of  receipt indicated in the proof received by the sending party that the message was delivered to  the specified recipient. II.5.3. Submission of e-documents via e-PRIOR  1. If provided for in the special conditions, the exchange of electronic documents (e- documents) such as requests for services, specific contracts and invoices between the  parties is automated through the use of the  e-PRIOR  platform. This platform provides  two possibilities for such exchanges: either through web services (machine-to-machine  connection) or through a web application (the  supplier portal ). 2. The contracting authority takes the necessary measures to implement and maintain  electronic systems that enable the  supplier portal  to be used effectively. 3. In the case of machine-to-machine connection, a direct connection is established  between the parties’  back offices . In this case, the parties take the measures necessary  on their side to implement and maintain electronic systems that enable the machine-to- machine connection to be used effectively. The electronic systems are specified in the  interface control document . The contractor (or leader in the case of a joint tender) must  take the necessary technical measures to set up a machine-to-machine connection and  at its own cost.  4. If communication via the  supplier portal  or via the web services (machine-to-machine  connection) is hindered by factors beyond the control of one party, it must  notify  the  other immediately and the parties must take the necessary measures to restore this  communication. 5. If it is impossible to restore the communication within two working days, one party  must  notify  the other that alternative means of communication specified in Article II.5.1  will be used until the  supplier portal  or the machine-to-machine connection is restored. 16 