Cal. Insurance Code § 1861.01

Insurance Rate Rollback. (a) For any coverage for a policy for automobile and any other form of insurance subject to this chapter issued or renewed on or after November 8, 1988, every insurer shall reduce its charges to levels which are at least 20% less than the charges for the same coverage which were in effect on November 8, 1987. (b) Between November 8, 1988, and November 8, 1989, rates and premiums reduced pursuant to subdivision (a) may be only increased if the commissioner finds, after a hearing, that an insurer is substantially threatened with insolvency. (c) Commencing November 8, 1989, insurance rates subject to this chapter must be approved by the commissioner prior to their use. (d) For those who apply for an automobile insurance policy for the first time on or after November 8, 1988, the rate shall be 20% less than the rate which was in effect on November 8, 1987, for similarly situated risks. (e) Any separate affiliate of an insurer, established on or after November 8, 1987, shall be subject to the provisions of this section and shall reduce its charges to levels which are at least 20% less than the insurer’s charges in effect on that date.