Had a bit of a read...
Section 17 makes it clear it can be done...
...needing 7 members present (section 25 (i) and (ii), and section 28) - best to be "unhappy campers" wanting the change by proposing a general members poll and Special/Extraordinary General meeting(but the more present the merrier)...
...using a stack of proxy votes at the next (Special/Extraordinary) General Meeting to get the spill of positions happening.
If it is as toxic a corporate structure as it is being made out to be, then IMHO this would not be an unreasonable approach.
Of note there does not appear to be anything the suggests the the CEO, AM, OM, AOM, and TM are not a part of the board, simply that there are 13 individuals on the elected board who undertake day-to-day running.
If there are enough misgivings to warrant an investigation, why not the corruption investigation organisation in NSW? (being registered in Fyshwick)