S.D. Codified Laws § 1-6-5 (2026)
All state flags made in conformity with state law prior to July 1, 1992, shall remain official state flags but the creation of a state flag from and after that date, other than in conformity with § 1-6-4, is prohibited.
Source: SDC 1939, § 55.0108 as added by SL 1963, ch 419 , § 1; SL 1992, ch 1 , § 3.