Ahh … well, now your chairman's actions make even less sense.
To be honest, we can quote the Act and regulations and CTTT rulings till the cows come home but if your chairman is a bully or just doesn't want any dissenting voices to be heard, nobody's going to put him in jail for playing fast and loose with the processes of the Owners Corporation.
By far the easiest thing to do is get rid of them by direct (democratic) action.
Have a look at this column which should give you a few ideas. But why not take him to Fair Trading and the CTTT to establish once and for all what he should have done and must do in the future. It could be a crucial step in letting your fellow owners know that his time is up.