S.D. Codified Laws § 9-40-15
Bonds issued pursuant to this chapter shall be payable solely from the revenue or income derived from the operation of such utility constructed or otherwise acquired or extended or improved hereunder. The municipality may, in the resolution or ordinance authorizing the bonds, provide that all or any portion of the revenue or income from the utility to be constructed, or otherwise acquired, extended, or improved hereunder, or any part thereof, be segregated from the other revenue or income of the utility, and that only the segregated portion of the revenue or income so segregated be used for the payment of such bonds. The municipality may for this purpose establish a special charge or surcharge for the services of the facilities financed by the bonds. If the bonds are made payable solely from such segregated revenue or income, or if the bonds are issued in connection with a financing agreement described in § 46A-1-49, then no election is required to authorize the issuance of the bonds, unless required by S.D. Const., Art. XIII, § 4.
SDCL 9-40-15