All incorporated associations are required to have a grievance process by 22 June 2022

If they don’t (and we don’t) then they would need to follow the processes set out in the model rules provided by the Office of Fair Trading

Complaints must be documented and if they are not resolved within the specified time the Committee is required to seek mediation.

I can’t see that there would be any barrier to parties agreeing to a resolution outside of these rules

If the association is “in disarray” a special general meeting can be called by
1) 33% of the MC
2) 7 members
3) The Secretary

References

Dealing with disputes and grievances with members (QLD), Justice Connect