Cal. Code Regs. tit. 5 § 17305
The county superintendent shall insure the office of the county superintendent against liability (other than a liability which is insured against under the provisions of Divisions 4 and 5 of the Labor Code) for damages by reason of death, or by reason of injury to person or property, resulting from the use of any motor vehicle or trailer to which the office of the county superintendent has title. The insurance shall be procured from an admitted insurer and shall be in an amount deemed by the county superintendent of schools to be appropriate. When a county superintendent of schools holds title to five or more motor vehicles and trailers and the cost of the insurance is charged to county school service funds, the insurance shall be at rates applicable to motor vehicle fleets.
Cal. Code Regs. Tit. 5, § 17305