Okla. Stat. tit. 80, § 80-5: National cemetery ceded - Rights reserved

Exclusive jurisdiction be, and the same is hereby ceded to the

United States over the tract of land comprised within the cemetery

known as the Fort Gibson National Cemetery, area about nine (9)

acres in Muskogee County; provided, however, that the State of

Oklahoma reserves the right to serve civil or criminal process

within said cemetery reservation in suits or prosecutions for or on

account of rights acquired, obligations incurred, or crimes

committed in said state but outside of said cemetery reservation.