S.D. Codified Laws § 26-7A-5
Proceedings in best interest of child
Proceedings under this chapter and chapters 26-8A , 26-8B , and 26-8C shall be in the best interests of the child.
Source: SDC 1939, § 43.0304; SL 1968, ch 164, § 4; SL 1991, ch 217, § 4B; SDCL, § 26-7-11; SL 1994, ch 213.