S.D. Codified Laws § 60-2-4 (2026)
Any person who agrees to serve another for a good consideration shall perform the service with ordinary care and diligence so long as employed.
Source: CivC 1877, § 1135; CL 1887, § 3758; RCivC 1903, § 1454; RC 1919, § 1078; SDC 1939, § 17.0303; SL 2008, ch 276 , § 9.