Hong Kong Regulations

ELECTORAL AFFAIRS COMMISSION (ELECTORAL PROCEDURE) (DISTRICT COUNCILS) REGULATION - SECT 62

What ballot papers are to be marked "損壞" and "SPOILT" by the Presiding Officer

(1) If an elector inadvertently deals with the ballot paper issued to him or
her in such a manner that it cannot be properly used as a ballot  paper or
makes an error in marking a ballot paper, he or she may apply to the
Presiding Officer for another ballot paper.

(2) The Presiding Officer may issue another ballot paper to a person referred
to in subsection (1) if that person gives back the ballot  paper already
issued to him or her to the Presiding Officer and establishes to the
satisfaction of the Presiding Officer the inadvertence or the fact that he or
she made an error.

(3) The Presiding Officer must immediately cancel the ballot paper given back
to that Officer under subsection (2) by endorsing on the front
of it with the words "損壞" and "SPOILT".