South Dakota Codified Laws
Chapter 41C - Unclaimed Property Held By Museums Or Historical Societies
Section 43-41C-4 - Title to abandoned property vested in museum or historical society.

43-41C-4. Title to abandoned property vested in museum or historical society.
If no claim has been made to the property within sixty-five days from the date of the second published notice, title to the property vests in the museum or society, free from all claims of the owner and of all persons claiming through or under him.

Source: SL 1993, ch 328, ยง4.