S.D. Codified Laws § 26-7A-15.3
As used in this chapter, the term, designated tribal agent, means the agent, agency, or entity designated by the tribe, through tribal code or resolution, to receive notices of child custody proceedings subject to the Indian Child Welfare Act. The tribe may provide, in writing, to the director of the Division of Child Protection Services, Department of Social Services, the name or title, address, telephone number, and facsimile number, if applicable, of the designated agent. The department shall make the information available electronically by posting the information on the department's website not later than ten business days after the information is received by the director. If a tribe does not designate a tribal agent for receipt of notice, notice shall be given in accordance with 25 C.F.R. 23.12.
SDCL 26-7A-15.3