11. Any application, document, or other written material which is required or authorised by these Rules to be made, served, given, sent or otherwise transmitted to any person may be sent by facsimile transmission, pre-paid post or delivered–
(a)in the case where the intended recipient of the application, document or other written material is the Board, tribunal or chairman of a tribunal, to the office of the Board; and
(b)in any other case, to the last known address of the intended recipient.