You AGM changes will take too long, but proceed that way I guess if the changes will bring benefit to all in future. In the nearer term I’d think get the body corp to write to the person directly maybe if you can deliver or post it, and pop it on his windscreen if not, telling him to park in his spot, and please watch himself. And drop in that cops will be involved should any nonsense be continued. Cops are interested in curbing on-going nonsense and the thought that he has been personally mentioned to police because of this may be enough to calm the horses. If it does get out of hand and you feel to pursue it police might discuss with you the possible implementation of a court ordered peace and good conduct order – but that’s starting to be serious and you make prefer not going that far.