Okla. Stat. tit. 19, § 781

All counties in this state are hereby authorized to issue bonds for the purpose of purchasing sites, erecting and constructing county hospitals including alterations, additions to, and enlargements of existing hospital buildings in the county, such bonds to be issued as hereinafter provided, except as provided in the Municipal and County Economic and Community Development Bonds Act pursuant to Section 800 et seq. of Title 62 of the Oklahoma Statutes.