Okla. Stat. tit. 62 § 57.18
Bonds issued under this act shall be serial coupon bonds and shall be issued to mature One Million Five Hundred Thousand Dollars ($1,500,000.00) in each of the calendar years 1973 through 1982, both inclusive, or if issued in series in proportionate amount thereof. Said bonds and the interest thereon shall be payable at the office of the State Treasurer of the State of Oklahoma, and, if the bonds shall be sold to private purchasers, at a fiscal agency in Oklahoma and/or New York City to be designated by the State of Oklahoma Building Bonds Commission. Said bonds may be executed in such manner, may be issued in one or more series, may bear such date or dates, may be in such denomination or denominations, may provide for a reserve to assure prompt payment of the principal and interest of the bonds, may be in such form either coupon or registered, may be payable in such medium of payment at such times, as may be provided by resolution or resolutions to be adopted by the State of Oklahoma Building Bonds Commission. Provided, that all such bonds maturing after ten (10) years from their dates may be subject to call and redemption, in inverse order of bond numbers, at par and accrued interest, with the detailed provisions for such calling and redemption thereof to be fixed by the Commission in the resolution or resolutions for the issuance of such bonds. Until such time as the State of Oklahoma Building Bonds of 1955 Sinking Fund shall be sufficient to retire all outstanding bonds and interest coupons, there shall be paid into said sinking fund during each fiscal year, from the sources hereinabove pledged such amounts as may be necessary to pay the interest and principal payable during the next succeeding fiscal year, and an amount sufficient to satisfy the reserve requirements as fixed and provided by the State of Oklahoma Building Bonds Commission in its resolution authorizing the issuance of said bonds. In the event the bonds herein authorized to be issued and sold are sold to the State Treasurer or to the Commissioners of the Land Office of the State of Oklahoma, then, and in that event, all money in the State of Oklahoma Building Bonds of 1955 Sinking Fund at the close of any fiscal year, in excess of a sum equal to all principal and interest coming due on said bonds in the next succeeding fiscal year, shall be transferred by the State Treasurer to the General Revenue Fund of the state to be used as other monies accruing to said fund. All bonds issued pursuant to this act shall have all the qualities and incidents of negotiable paper, and neither said bonds nor the interest earned thereon shall be subject to taxation by the State of Oklahoma or any county, municipality or political subdivision thereof.
Okla. Stat. tit. 62, § 57.18