S.D. Const. art. XXI, § 9. Marriage.

§ 9. Marriage. Only marriage between a man and a woman shall be valid or recognized in South Dakota. The uniting of two or more persons in a civil union, domestic partnership, or other quasi-marital relationship shall not be valid or recognized in South Dakota. History: Amendment proposed by SL 2005, ch 1, § 2, approved Nov. 7, 2006.