Mo. Rev. Stat. § 49.560

49.560. Revenues placed in special fund — use — rentals, rates and charges. — 1. At or before the issuance of the bonds the governing body of the county shall, by ordinance or order, agree to set aside and pledge the income and revenue of the buildings and land into a separate and special fund to be used and applied only in payment of the bonds and interest and in the maintenance thereof, including therein a sufficient sum to pay the cost of insuring the buildings in favor of the county and each and every bondholder, as his interest may appear, against loss or damage by fire and windstorm or other calamity in such sum as may be acceptable to the purchasers of the bonds and as may adequately protect the property.

2. The ordinance or order shall fix the total amounts of the rents, fees, and other charges to be imposed for the use and occupation of the buildings or services to be thereby furnished in a sum sufficient to meet the obligations of the bonds and interest as set forth in subsection 1, and shall also provide that the sum shall be paid into the separate fund monthly, from the current funds of the county. The rents, fees, and other charges for the services from the buildings shall be fixed in an amount sufficient to provide for the payment of interest upon all bonds, and to create a sinking fund to pay the principal thereof when the same becomes due and to provide for the operation and maintenance thereof, including insurance. The rents, fees and other charges shall be revised by ordinance or order from time to time so as to produce these amounts as may be required.

(L. 1961 p. 278 § 9, A.L. 1975 H.B. 510)