S.D. Codified Laws § 13-48-43
For the purposes of this chapter, physical location in this state, means the ongoing occupation of a physical location in South Dakota for instructional purposes or the maintenance of an administrative office to facilitate instruction. The following activities do not constitute the use of a physical location in this state: delivering of distance education courses online, through correspondence or broadcast; advertising; recruiting; contractual arrangements to acquire goods or services, including educational or examination proctoring services, with institutions or businesses physically located in South Dakota; courses delivered on military installations by an accredited institution limited to active and reserve military personnel, dependents of military personnel, and civilian employees of the military installation; field trips; operation of a server or other electronic service device; short courses (twenty classroom hours or less, or the equivalent thereof); courses for which fewer than twenty-five percent of class requirements take place in a setting where the instructor and students physically meet together; and experiential learning opportunities, such as a clinical, practicum, residency, or internship, if the offering institution has already obtained all the necessary professional and licensure approvals necessary to conduct the learning opportunity in the state, and that only ten students from each institution are physically present simultaneously at a single field site.
SDCL 13-48-43