Okla. Stat. tit. 60 § 178.6
The provisions of Sections 652 and 653 of Title 62 of the Oklahoma Statutes and Sections 178.4 and 178.5 of this title shall not affect: public trusts operating, financing or refinancing facilities for the aged or disabled persons by nonprofit, religious or benevolent organizations; public trusts operating, financing or refinancing county, municipal or nonprofit hospitals; public trusts operating college or educational dormitories or student housing facilities; trusts formed for the purpose of constructing buildings for local units of the Department of Human Services under the provisions of Section 189a of Title 56 of the Oklahoma Statutes; public trusts carrying out redevelopment, rehabilitation and conservation activities in accordance with an approved urban renewal plan, provided property owned by said trust shall not be exempt from ad valorem taxation for a period exceeding five (5) years; trusts created under the provisions of Sections 15-141 through 15-147 of Title 2 of the Oklahoma Statutes or other trusts created for the same purpose. Section 176 et seq. of this title shall not prevent public trusts from administering or financing a housing program pursuant to a contract with an agency of the United States Government or the State of Oklahoma, or prevent public trusts from financing or refinancing housing projects, provided said projects:
A public trust with a city or cities, a county or counties, or the state as the beneficiary or beneficiaries thereof may issue its evidences of indebtedness for the purpose of financing housing projects or housing programs within the geographic boundaries of its beneficiary or beneficiaries as same represent an authorized and proper public function for public trusts.
Okla. Stat. tit. 60, § 178.6