S.D. Codified Laws § 53-10-1 (2026)
An executed contract is one, the object of which is fully performed. All others are executory.
Source: CivC 1877, § 952; CL 1887, § 3576; RCivC 1903, § 1270; RC 1919, § 891; SDC 1939, § 10.0103.