S.D. Codified Laws § 36-21A-96
Before the approval of an application, the applicant shall file with the commission a designation in writing that appoints the executive director of the commission to act as the applicant's agent, upon whom all judicial and other process or legal notices directed to the applicant may be served. Service upon the designated agent is personal service upon the applicant. Copies of the appointment, certified by the executive director of the commission, are sufficient evidence thereof and shall be admitted into evidence with the same force and effect as the original. In the written designation, the applicant shall agree that any lawful process against the applicant, which is served upon the agent, shall be of the same legal force and validity as if served upon the applicant and that the authority shall continue in force so long as any liability remains outstanding in this state.
SDCL 36-21A-96