INSURANCE

USAA to Pay $31 Million More in Rebates: United Services Automobile Assn., a San Antonio, Tex.-based auto insurer that sells to military officers and their families, will refund the money to 218,000 California policyholders under Proposition 103, the 1988 rate-cutting initiative, state Insurance Commissioner John Garamendi announced. USAA, which is owned by its policyholders, has already paid about $44 million in rebates as a result of the measure. It agreed to the additional rebates--which average $142 apiece--in negotiations with Garamendi, who had originally ordered the company to pay $112 million.