Before you sell your property you will need to make sure your pool/spa is registered with the NSW swimming pool register. You will also need to have a compliance certificate, occupation certificate or certificate of non-compliance.
To check if your pool or spa is compliant visit http://www.swimmingpoolregister.nsw.gov.au/
More information can be found here http://www.fairtrading.nsw.gov.au/ftw/consumers/product_and_service_safety/pool_safety/swimming_pools.page