The Governor may, in case of war, insurrection, invasion, riot, or imminent danger, increase the National Guard force beyond the maximum established by law and may organize and muster the additional forces with proper officers, as the exigency of the service requires and the President authorizes.
S.D. Codified Laws § 33-3-6
Emergency mustering of National Guard
Source: SL 1887, ch 100, § 7; CL 1887, § 1923; RPolC 1903, § 2465; SL 1903, ch 185, § 19; SL 1913, ch 267, § 14; SL 1917, ch 297, § 16; RC 1919, § 10569; SDC 1939, § 41.0122; SL…
Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.