S.D. Codified Laws § 1-16H-11 (2026)
A majority of the voting members of the board constitutes a quorum for the transaction of business. Any official act of the authority requires the affirmative vote of at least four voting members of the board at a meeting of the board at which the members casting those affirmative votes are present.
Source: SL 2004, ch 15 , § 11, eff. Feb. 11, 2004; SL 2009, ch 1 , § 22; SL 2014, ch 8 , § 3.