There’s no penalty for that specifically but under section 238 (below) you can take them to NCAT seeking orders to have them removed from the committee for acting improperly.
But why would they be in cahoots? What were they trying to avoid having discussed?
238 ORDERS RELATING TO STRATA COMMITTEE AND OFFICERS
(1) The Tribunal may, on its own motion or on application by an interested person, make any of the following orders:
(a) an order removing a person from a strata committee,
(b) an order prohibiting a strata committee from determining a specified matter and requiring the matter to be determined by resolution of the owners corporation,
(c) an order removing one or more of the officers of an owners corporation from office and from the strata committee.
(2) Without limiting the grounds on which the Tribunal may order the removal from office of a person, the Tribunal may remove a person if it is satisfied that the person has:
(a) failed to comply with this Act or the regulations or the by-laws of the strata scheme, or
(b) failed to exercise due care and diligence, or engaged in serious misconduct, while holding the office.