Are we talking about a company or individual because
The Owners Corporation may issue a Statutory Demand to recover unpaid strata levies from a company lot owner, instead of issuing a Statement of Claim at the Local Court, District Court or Supreme Court. However, the Statutory Demand cannot be issued if the lot owner is not a company.
I’d assume an individual (most common) so do what Jimmy suggests Google “strata debt collection” and speak to them about your situation as they will be able to handle everything AND add their costs to the bill the owners WILL have to pay. Just chose the debit collection agency you feel most comfortable with and put a motion to the AGM to let company x pursue lot x,y and z for undue levies, then sit back and wait for the money to roll in (don’t forget the 10% penalty)
As formerrenter says the debit is against the lot and so even if the owners sells the new owner becomes responsible for the unpaid dues (buyers sol should pick this up and withhold money from seller).