Hong Kong Regulations

ELECTORAL AFFAIRS COMMISSION (ELECTORAL PROCEDURE) (ELECTION COMMITTEE) REGULATION - SECT 59

What ballot papers are to be marked "未用" and "UNUSED" by Presiding Officer

(1) Unless it is not reasonably practicable to do so, the Presiding
Officer must endorse the words "未用" and "UNUSED" on any ballot paper that
has been issued but has not been put into the ballot box, including any ballot
paper kept in that Officer's custody under section 55(4) or (6) at the close
of the poll.

(2) References in this Regulation to an "unused ballot paper" are to be
construed as references to a ballot paper which has been issued and has not
been put into the ballot box, whether or not it has been endorsed under
subsection (1).