SDCL § 5-12-18: Costs and reserves to be covered by rent and charges.

The charges, fees, or rentals established by the Building Authority for the use of any facilities acquired, constructed, completed, remodeled, or equipped in whole or in part with the proceeds of the bonds issued as provided in this chapter shall be sufficient at all times to pay maintenance and operation costs for such facilities (unless under a lease maintenance and operation costs are otherwise provided for), principal of and interest on the bonds and a proportion of the administrative expenses of the authority as provided for by each lease, and such reserves as may be provided in the resolutions of issuance.