Okla. Stat. tit. 19, § 19-339.3: Disposition of funds

The board of county commissioners shall place all funds received

from the sale of land, sites or structures in a special fund to be

used for the purchase or construction of facilities for use by the

county. All such funds may be invested by the county treasurer as

directed by the board of county commissioners in state or national

banks or trust companies upon insured time deposit bearing interest

at a rate no less than currently being paid upon insured savings

accounts in said institutions or invested in direct obligations of

the United States government.