Okla. Stat. tit. 19, § 137.3

Any elected county officer of counties of three hundred thousand (300,000) population or over may purchase liability insurance coverage not to exceed Fifty Thousand Dollars ($50,000.00) to pay all losses and damages incurred by an action against such officer, arising out of any act of negligence committed by such elected county official occurring in the operation of his office. The costs of such insurance coverage shall be paid by the county. The costs provided for herein shall be within the approved budget of the officer seeking to purchase the insurance coverage allowed herein.