21A.—(1) The Registrar may communicate with any party —
(a)
through the electronic system;
(b)
by sending electronic mail to an electronic mail address designated by that party;
(c)
through any messaging system that is agreed between the Registrar and that party; or
(d)
by any other means that is agreed between the Registrar and that party.
(2) Where any party agrees to communicate with the Registrar by a means of communication mentioned in paragraph (1), that party must monitor that means of communication for any communication from the Registrar to that party, until the conclusion of the proceedings involving that party.