It’s got me rather puzzled that a by-law was passed at the AGM by the other three owners (if this applies to NSW). A by-law requires a special resolution passed by 75% of owners represented at the meeting. Then it has to be registered. Would suggest that the ball is in the OCs court, if they wish to enforce it then they have to go through the mediation and ajudication process, let them pay the fees.
David B