 The measure required auto insurers to base auto insurance premiums primarily on a policyholder's driving safety record, annual mileage driven and years driving experience.Proposition 103 also made the California Insurance Commissioner an elected official, subjected insurers to California's antitrust laws, civil rights laws and unfair business competition law.It also included a provision for "intervenor fees," which has resulted in payments to Rosenfield and his organizations of more than $6 million.