The Fair Trading document Strata Living says this about committees:
“Strata committee members must act with due care and diligence and must disclose any conflict of interest at a meeting, which must also be recorded. If a strata committee member does not disclose a conflict of interest, this may result in them receiving a penalty of up to $1,100.”
“Due care and diligence” covers a multitude of sins. There is probably a very good reason or not being more specific – every time you specify unacceptable behavior, some people take non-specified behaviour as implicitly acceptable.
There are plenty of options for dealing with committees that act dishonestly but unless you are more specific in your complaints, there’s not much point is asking us for advice.