15.—(1) Subject to this rule, any person shall be capable of being appointed proxy to vote for a registered owner at any poll and may vote in pursuance of the appointment.
(2) A registered owner cannot have more than one person at a time appointed as proxy to vote for him at a poll.
(3) A person shall not be capable of being appointed to vote, or of voting, as a proxy at a poll if —
(a)
he is, at the commencement of the poll, below 21 years of age;
(b)
he is under any written law found or declared to be of unsound mind; or
(c)
he is not a citizen of Singapore.
(4) A proxy need not be a registered owner of a beneficiary flat within the precinct or a registered owner of a beneficiary flat within the building in relation to which the poll is conducted.
(5) A person appointed to vote as proxy shall vote in person.