31.—(1) The persons entitled to appear and be heard are as follows–
(a)on an application, the applicant;
(b)on an objection, the objector and the person objected to;
(c)on an application or an objection, any other person who appears to the registration officer to be interested.
(2) The right to appear and be heard includes the right to make written representations.
(3) Any person entitled to appear and be heard may do so either in person or by any other person on his behalf.
(4) The registration officer may, at the request of any person entitled to appear and be heard or, if he thinks fit, without such a request, require that the evidence tendered by any person shall be given on oath or affirmation and may administer the oath or affirmation for the purpose.