The address for service for an owner of a lot, or another person whose address for service is required to be given to the body corporate, must be an Australian address.
If no address for service for an owner of a lot or other person is notified to the body corporate, the address for service is the residential or business address, whether inside or outside Australia, as last notified to the body corporate for the owner or other person.
Even if there are 2 or more co-owners for 1 lot, there must nevertheless be only 1 address for service for the owners.