Mo. Rev. Stat. § 164.231
For the purpose of providing funds for the acquisition, construction, erection, equipment and furnishing of dormitory or of school athletic stadiums or structures, and for providing a site therefor, including offstreet parking space, and making from time to time enlargements or extensions thereof, the board of directors of any seven-director school district may issue and sell revenue bonds in an amount not to exceed the estimated cost of the dormitory or project, including costs necessarily incidental thereto. No such bonds shall be issued and sold unless at the time of the issuance thereof the board of the school district issuing them shall pledge the net income and revenues of the dormitory or project to the payment of the bonds, both principal and interest, and covenant to fix, maintain and collect such reasonable rates, rentals and charges for admission of spectators to witness such games, contests and exhibitions, and returns and charges for concessions and broadcasting as in the judgment of such board of directors will provide revenues sufficient to pay the reasonable cost of operating and maintaining such dormitory or project and to provide and maintain an interest and sinking fund in an amount adequate promptly to pay the principal of and interest on such bonds. Nothing herein shall prevent the board from authorizing use of the dormitory or project and admittance thereto without charge at such time and for such occasions and to such extent as the board determines. In addition to pledging the net income and revenues as herein provided, the board in its discretion may mortgage, by mortgage or deed of trust, the real and personal property comprising the dormitory or project or portions thereof for the payment of the bonds, both principal and interest, and as additional security therefor may by the terms of the mortgage or deed of trust grant to the purchaser in case of foreclosure sale thereof the right and privilege to operate the dormitory or project, subject to the limitations and conditions set out in the mortgage or deed of trust. The revenue bonds are payable, both as to principal and interest, solely and only out of the net income and revenues arising from the operation of the dormitory or project for which they were issued, after providing for the costs of operation and maintenance as aforesaid, or from other funds made available to the school district from sources other than from proceeds of taxation, or from proceeds of foreclosure sale of property mortgaged or pledged as security therefor.
§ 164.231, RSMo