South Dakota Codified Laws
Chapter 09 - Future Estates In Real Property
Section 43-9-5 - Contingent remainder in fee created on prior remainder in fee.

43-9-5. Contingent remainder in fee created on prior remainder in fee.
A contingent remainder in fee may be created on a prior remainder in fee, to take effect in the event that the persons to whom the first remainder is limited die under the age of twenty-one years, or upon any other contingency by which the estate of such persons may be determined before they attain majority.

Source: CivC 1877, §229; CL 1887, §2745; RCivC 1903, §252; RC 1919, §322; SDC 1939, §51.0413.