Interesting, so basically not available for those states. Although..
In the event that the Prize, or part of the Prize, is unavailable or not suitable for the winner’s residence (as determined by the Promoter), the Promoter reserves the right to substitute the Prize or part of the Prize in its discretion with an alternative prize or part of the Prize to the same and equal recommended retail value and/or specification.
Entry is open to residents of Australia, aged 18 and over and who own their own property and reside in it as their primary place of residence. For the avoidance of doubt, to be a valid entrant, the entrant’s name must be on the title of the property for which an entry is submitted. The property must be located in a state or territory that is not Western Australia, Northern Territory or certain households located in Queensland (those not in the Energex distribution network)