Mo. Rev. Stat. § 164.261
1. Revenue bonds issued under section 164.231 shall be of such denomination, shall bear such rate of interest not to exceed four percent per annum, and shall mature at such time within twenty years from the date of issuance thereof as the board of directors of the school district determines. The bonds may be either serial bonds or term bonds. Serial bonds may be issued with or without reservation of the right to call them for payment or redemption in advance of their maturity, upon the giving of notice and with or without the covenant requiring the payment of a premium in the event of the call and redemption prior to maturity as the board determines. Term bonds shall contain a reservation of the right to call them for payment and redemption prior to maturity at such time and upon the giving of notice and upon the payment of such premium, if any, as the school board determines. Each such bond shall bear on its face a prominent legend reading substantially as follows:
"THIS IS A REVENUE BOND ONLY AND THE HOLDER THEREOF SHALL NEVER HAVE ANY RIGHT TO DEMAND OR RECEIVE PAYMENT OF THE PRINCIPAL OR INTEREST THEREOF FROM ANY FUNDS RAISED OR TO BE RAISED BY TAXATION."
(L. 1963 p. 200 § 5-26)
(Source: RSMo 1959 § 176.160)