S.D. Codified Laws § 47-20-2
Current with legislation signed by the governor on or before 3/6/2024
At any reasonable time, any member or stockholder of a cooperative, or his agent or attorney, upon written notice stating the purposes thereof, delivered or sent to the cooperative at least one week in advance, may examine for a proper purpose any books or records pertinent to the purpose specified in such notice.
SDCL 47-20-2