I’m confused about that, subpara 4(2) of Schedule 3 says the OC must appoint someone to the vacancy, but there is no indication of how they are appointed/by whom. You shouldn’t have to go to the owners to appoint them, because that would be a general meeting, which would defeat the purpose, but on its face it’s unclear.
2) When a vacancy occurs in the office of a member of an executive committee (otherwise than by reason of subclause (1) (d)), the owners corporation must appoint a person eligible for election as a member to fill the vacancy. Any person so appointed holds office, subject to this clause, for the balance of his or her predecessor’s term of office.