Any combined system furnishing light, heat, power, water supply, and sewerage service, or any of such services may be hereafter acquired, established, equipped, maintained, operated, extended, or improved as a single utility under the provisions of this chapter, and any two or more systems owned and operated by a municipality may be combined for such purposes, or additional services of the types mentioned in § 9-40-1 may be added to those furnished by any utility system owned and operated by the municipality; provided, that the nature of such combined system shall be set forth and the necessity for such combination determined in and by the ordinance required by the provisions of § 9-40-5.
SDCL 9-40-3