Each house may determine its rules of proceeding, punish contempts, punish its members for disorderly behavior, and, with the concurrence of two-thirds, expel a member; but not a second time for the same cause.
Rules of Houses -- Contempt
S.D. Const. art. VI, § 7 — under Counties and Townships.
S.D. Const. art. VI, § 7
Rules of Houses -- Contempt