S.D. Codified Laws § 43-5-1
Current with legislation signed by the governor on or before 3/6/2024
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.
SDCL 43-5-1