Okla. Stat. tit. 63, § 695.7

Officers or employees of a jurisdiction rendering aid in another jurisdiction pursuant to the Oklahoma Intrastate Mutual Aid Compact shall be considered within the scope of employment of the requesting jurisdiction for tort liability and immunity purposes. No jurisdiction or its officers or employees rendering aid in another jurisdiction pursuant to the Compact shall be liable on account of any act or omission in good faith on the jurisdiction of such forces while so engaged or on account of the maintenance or use of any equipment or supplies in connection therewith. Good faith shall not include willful misconduct, gross negligence, or recklessness.