CTP insurance, or Compulsory Third Party insurance, is mandatory for all vehicles registered in Perth and throughout Western Australia. It covers you for injuries caused to other people in an accident where you are at fault. It's important to shop around for the best rates and services, as different insurers offer varying premiums and coverage options. Be sure to check the details of your policy, as certain conditions may apply. For more information on requirements and providers, the Western Australian government website can be a helpful resource.