Subsection 24(7) cites the reasons for which a returning officer may be removed:
a) [...] for reason of illness, physical or mental disability [...]
b) fails to discharge competently a duty of a returning officer under this Act or to comply with an instruction of the Chief Electoral Officer [...]
c) fails to complete the revision of the boundaries of the polling divisions in their electoral district as instructed by the Chief Electoral Officer [...]
d) contravenes subsection (6) [knowingly engages in politically partisan conduct] [...]