I don’t know if you can fill these positions without a meeting. This is what the Act says:
(2) When a vacancy occurs in the office of a member of an executive committee … 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.
Although the Act says the new members should be appointed by the Owners Corporation, this is usually taken to mean the EC acting in their capacity as the OC’s executive. Normally, this would mean that the EC would, at their next meeting, confirm appointments or elect someone by ballot.
So, if your EC refuses to meet or to call a general meeting, they are in contravention of the Act that says new members ‘must’ be appointed. I would pressure them to hold a meeting to confirm the new appointments or face action at the CTTT who could be asked to issue an order forcing the EC to meet.
Alternatively, you could garner the signatures to force an EGM. This might be safer, in case they try to elect their own nominees to consolidate their position.
Interestingly, they should not be making any more decisions without electing new members because, if the new members names have been forwarded to them, any meeting they have is required to consider nominees for election.
Forward the names to your strata manager and whoever is the secretary and remind them they are required to call a meeting at the earliest opportunity to consider the new members to fill the vacant seats, otherwise they are in contravention of the Act.