You will need this registration to own more than 2 cats.
You can keep up to 4 cats without registration if your property is greater than 2000 square meters.
If your local council requires cat registration, you will need to register your cat with your council within 14 days of it reaching 12 weeks of age, unless otherwise provided under local law. If you become an owner of a cat which is over 12 weeks of age, you will need to register your cat with your local council within 14 days, unless otherwise provided.