Motor vehicle insurance; unauthorized addition of insured drivers prohibited. Prohibits an insurance carrier authorized to issue motor vehicle liability insurance policies from automatically adding any person to the list of persons insured under a motor vehicle owner's policy or to the household of a named insured for purposes of such policy based solely on certain information enumerated in the bill. The bill prohibits such a carrier from increasing premiums for, canceling, or refusing to renew a policy based solely on the failure of the named insured to respond to a communication demanding confirmation of an additional insured driver or household member. The bill authorizes the State Corporation Commission to investigate and enjoin via order any violation of its provisions and subjects a person who violates such order to certain penalties enumerated in the bill.