Okla. Stat. tit. 70 § 1210.43
In event the vehicle is loaned the board of education shall provide insurance, by securing a policy from an insurance company authorized to do business in this state, with limits of not less than Twenty-five Thousand Dollars ($25,000.00) because of bodily injury to or death of one person in any one accident and, subject to said limit for one person, to a limit of not less than Fifty Thousand Dollars ($50,000.00) because of bodily injury to or death of two or more persons in any one accident, and if the accident has resulted in injury to or destruction of property to a limit of not less than Twenty-five Thousand Dollars ($25,000.00) because of injury to or destruction of property of others in any one accident, to cover such motor vehicle and its use while in its possession or control, and the owner so furnishing same shall not be liable for any personal injury or property damage resulting from the use of any such motor vehicle while in the possession of the board of education, its officials, employees or students.
The use of such motor vehicles for the purposes stated in Section 1210.41 of this title by technology center schools or technology center school districts is declared to be a public governmental function and no action for damages shall be brought against such schools or school districts or the boards of education thereof and the amount of damages, if any, recoverable against and collectible from such insurer may be determined in an action brought against said insurance company and shall be limited to the amount provided in the insurance contract.
Okla. Stat. tit. 70, § 1210.43