Okla. Stat. tit. 60 § 392
Any unconditional gift, testamentary or otherwise, of any property whatsoever to the State of Oklahoma and a county therein and a city or town within such county, without designation of any particular purpose or purposes to which such property is to be devoted, shall be construed as being intended for public improvements within such town or city and county, including but not limited to the construction of public improvements, the purchase of lands upon which to construct public improvements (or, in the case of public highways, the purchase of necessary rights-of-way therefor), and repairs and additions to existing public improvements, within such town or city and county. The use of such property for such public improvement purposes, as hereinafter provided for, is hereby declared to be a coordinate and joint public purpose of such governmental units.
Okla. Stat. tit. 60, § 392