Okla. Stat. tit. 64, § 64-1052: Appraisement

Before any lands under the jurisdiction and control of the

Commissioners of the Land Office, covered by preference right leases

and the improvements located on the land are owned by the lessees,

shall be offered for sale and sold, the Commissioners of the Land

Office shall cause the same to be appraised by three disinterested

appraisers, who are nonresidents of the county in which the land is

situated, to be selected by the Secretary. The appraisers, before

entering upon their duties, shall take and subscribe the oath

required of state officers. The appraisers shall make a true

appraisement of the lands at the actual cash value thereof,

exclusive of all improvements, and shall separately appraise all

improvements owned by the lessee which can be removed without

manifest injury to the land.