Okla. Stat. tit. 44, § 44-72: Ordering into active service

It shall be the duty of the Governor, and he or she is

authorized and required, in case of war, invasion, insurrection, or

breach of the peace or imminent danger thereof or any forcible

obstructing of the execution of the laws or reasonable apprehension

thereof, or an imminent or existing epidemic or pandemic, and at all

other times he or she may deem necessary, to order on state active

duty the National Guard or any part thereof. No member thereof who

shall be ordered out for such state active duty shall be liable for

civil prosecution for any act done by him or her in the discharge of

his or her military duty on such occasions.