S.D. Codified Laws § 2-15-12 (2026)
A majority of the total number of delegates to the convention shall constitute a quorum. The convention shall have power to choose a president and secretary and all other necessary officers, and to make rules governing the procedure of the convention; such convention shall be the judge of the qualification and of the election of its own members.
Source: SDC 1939, § 55.1007.