20. Communications after the Preliminary Conference

20.1     Any written communication or brief or application or submission relating to the proceedings is:

(i) if exchanged between the Parties, copied to the Tribunal and to the Secretariat;

(ii) if exchanged between the Tribunal and either Party, copied to the other Party and to the Secretariat.

20.2        Any written form of communication is admitted, be it by mail or facsimile or electronic means or by other similar mean if authorised by the Tribunal.

21.