Proof of insurance is not required for either a driver's license or plates unless your state has a law that requires one of those things. Many, if not most, states, have no such requirement. I KNOW, because in my job as an attorney for the Montana State Legislature, I have for many years worked on proposed laws on this subject, none of which have passed and become law. The MAIN problem with such laws, and the reason why most states do not pass them, is that they do not work. What people do is get insurance, then get a license (or plates) and then cancel the insurance as soon as they get the license or plates. The licensing agency of the state does not know that the insurance is canceled unless the insurance company tells that agency that the insurance has been canceled. And, believe me, the insurance companies fight tooth and nail to stop laws that require them to give licensing agencies of the state such a notice. I have personally worked on proposed laws that went nowhere because of that.