S.D. Codified Laws § 9-42-9 (2026)
In all cases where, prior to July 1, 1953, contracts for local improvements have been awarded in accordance with the procedure prescribed in §§ 9-42-3 to 9-42-8, inclusive, all such proceedings, and all special assessments levied on the basis of such contracts prior to July 1, 1953, are legalized and validated.
Source: SL 1953, ch 260 , § 2; SDC Supp 1960, § 45.1501-1.