Okla. Stat. tit. 63 § 1069
Bonds of an authority shall be authorized by its resolution and may be issued in one or more series and shall bear such date or dates, mature at such time or times, bear interest at such rate or rates, not exceeding six percent (6%) per annum, be in such denomination or denominations, be in such form either coupon or registered, carry such conversion or registration privileges, have such rank or priority, be executed in such manner, be payable in such medium of payment, at such place or places, and be subject to such terms of redemption, with or without premium, as such resolution or its trust indenture may provide.
The bonds must be sold at public sale at not less than par.
Bonds of the authority shall not be purchased by members of the authority or its employees or members of their immediate families.
In case any of the members or officers of an authority whose signatures appear on any bonds or coupons shall cease to be such members or officers before the delivery of such bonds, such signatures shall, nevertheless, be valid and sufficient for all purposes, the same as if such members or officers had remained in office until such delivery. Any provision of any law to the contrary notwithstanding, any bonds issued pursuant to this act shall be fully negotiable.
In any suit, action or proceeding involving the validity or enforceability of any bond of an authority or the security therefor, any such bond reciting in substance that it has been issued by the authority to aid in financing a project, as herein defined, shall be conclusively deemed to have been issued for such purposes and such project shall be conclusively deemed to have been planned, located and carried out in accordance with the purposes and provisions of this act.
Okla. Stat. tit. 63, § 1069