Section 30 of the Strata Schemes Management Act says the committee must be elected at each AGM and may also do so at a general meeting called to elect members of the committee.
Those words “must” and “may” are critical. They imply that if the owners want a change of committee members between AGMs they can call a special meeting, but they OC still MUST have an election at its AGMs.
You might consider requesting mediation at Fair Trading (which is free) as a precursor to taking action at NCAT under section 232 (2), seeking orders from the Tribunal to hold a committee election ASAP.
Section 30(4) The members of a strata committee—
(a) must be elected at each annual general meeting of the owners corporation, and
(b) may be elected at another general meeting called to elect members of the committee.