Okla. Stat. tit. 80, § 80-2: Jurisdiction ceded to United States over lands acquired

Exclusive jurisdiction in and over any lands so acquired by the

United States shall be, and the same is hereby ceded to the United

States for all purposes except the service upon such sites of all

civil and criminal process of the courts of this state; but the

jurisdiction so ceded shall continue no longer than the said United

States shall own such lands.