Okla. Admin. Code § 145:10-1-5
The State Government shall not be liable for any claim based upon the exercise or performance of, or the failure to exercise or perform a discretionary function or duty on the part of a State agency or an employee of the State Government in carrying out the provisions of the Act.
Added at 11 Ok Reg 4611, eff 8-26-94 (emergency)
Added at 12 Ok Reg 3320, eff 8-11-95