S.D. Codified Laws § 9-3-21 (2026)
In all cases where application has, before July 1, 1939, been made for the organization of a municipality and such municipality has assumed to act as a municipality, the organization thereof is hereby in all things legalized, ratified, and declared valid, notwithstanding any errors, omissions, or informalities therein.
Source: SL 1907, ch 6 ; SL 1907, ch 8 ; RC 1919, § 6184; SDC 1939, § 45.0314; SL 1992, ch 60 , § 2.