Cal. Gov. Code § 3121

Any local agency may, subject to rules and regulations promulgated by the legislative body thereof, insure its officers, directors, deputies, assistants, employees and agents for injury or death incurred while traveling on the business of the agency and the cost of such insurance shall be a proper charge against the local agency. Proceeds of such a policy shall be payable to a beneficiary named by the person insured or, if none is named, to his estate.