S.D. Codified Laws § 51A-7-23
The commission may enter into joint examinations or joint enforcement actions with other bank supervisory agencies having concurrent jurisdiction over any branch established and maintained in South Dakota by an out-of-state bank or any branch established and maintained by a South Dakota state bank in any host state. The director may at any time take any actions independently if the director deems such actions to be necessary or appropriate to carry out the commission's responsibilities under §§ 51A-7-13 to 51A-7-26, inclusive, or to ensure compliance with the laws of South Dakota. However, in the case of an out-of-state state bank, the director shall recognize the exclusive authority of the home state regulator with respect to matters of safety and soundness.
SDCL 51A-7-23