Yes, you surely can avail the NCB if you change your insurance provider at the time of renewing the policy. All you would need to do is producing a proof of the earned NCB from your current insurance provider. You can produce the original copy of your expiring policy and a certification that you haven’t filed any claim for the (expiring) insurance plan. A renewal notice or a letter stating that you’re entitled to the NCB from your previous insurance provider can be a proof for this.
In South Australia, since July 2016, CTP is no longer provided by the Motor Accident Commission.The government has now licensed four private insurers - AAMI, Allianz, QBE and SGIC, to offer CTP insurance SA. The scheme allocates one provider for 3 years as part of vehicle registration. After July 2019, vehicle owners can choose a different CTP insurer and new insurers may also enter the market. 
Auto insurance isn’t only great protection for your vehicle, it’s also the law. All states require some degree of insurance for your vehicle to protect you and other motorists. Coverage requirements will vary based on your financial responsibility for your car and your state’s requirements. Some states even require you to have liability insurance before you even get a license.
Insurance companies are changing their insurance rates all the time. Sometimes they raise them when there have been a large number of claims, and sometimes they lower rates when they are looking to pick up more clients. What all of this amounts to is that a cheap policy might just represent a market shift or a change in the needs of a particular company. In other words, don’t just give the hairy eyeball to all cheap rates; seek them out. Just make sure that the policy represents your needs well.
Now that the industry has changed such that you can get insurance rates for free, you need to know how to compare insurance rates so that you are getting the best deal to protect your home, car, business, health or family. First, once you fill out a form on netQuote, your work isn’t finished. You now need to compare the exact policies from each company and see:
Insurance is a fact of everyday life. If you want to own a car, a home, or a business, or simply want to protect your family’s health, you need to be—and in some cases, have to be—insured. Getting coverage can sometimes become an overwhelming and confusing process, and sometimes an expensive one, but it doesn’t have to be. NetQuote provides you not only with the ability to compare quotes, but also with the information you need to make the process easier.
Any car insurance comparison tool you look at should have your state’s minimum car insurance requirements pre-loaded into its options. States requiring PIP or medpay are generally referred to as “no-fault” states, meaning that when injuries occur, each driver in a crash makes a claim with their own insurance company to pay for them. Beyond the PIP or medpay limit, the at-fault driver’s liability insurance kicks in to cover the rest.