S.D. Codified Laws § 15-7-9
The use and operation of an aircraft in the State of South Dakota by a nonresident or his agent or by a resident owner or his agent who has remained without the state continuously for thirty days prior to the commencement of an action against him, shall be deemed an appointment by such nonresident of the secretary of transportation to be his true and lawful attorney upon whom may be served all legal process in any action or proceeding against him growing out of such use or operation of an aircraft in the State of South Dakota resulting in damages or loss to person or property, and said use or operation shall be signification of his agreement that any such process in any action against him which is so served shall be of the same legal force and validity as if served upon him personally.
SDCL 15-7-9