S.D. Codified Laws § 43-5-1 (2026)
The absolute power of alienation may not be suspended by any limitation or condition whatever for a longer period than during the continuance of the lives of persons in being plus a period of thirty years at the creation of the limitation or condition, except in the single case mentioned in § 43-9-5 relating to contingent fee remainder on a prior fee remainder.
Source: CivC 1877, § 201; CL 1887, § 2717; RCivC 1903, § 224; RC 1919, § 294; SDC 1939, § 51.0231; SL 1983, ch 304 , § 6.