S.D. Codified Laws § 47-9A-12
The restrictions of §§ 47-9A-1 and 47-9A-3 do not apply to agricultural land acquired by a corporation other than a family farm corporation or authorized farm corporation for immediate or potential use in nonfarming purposes. A corporation may hold such agricultural land in such acreage or such form of ownership as may be necessary to its nonfarm business operation. However, pending the development of agricultural land for nonfarm purposes, such land may not be used for farming except under lease to a family farm unit, a family farm corporation or an authorized farm corporation, or except when controlled through ownership, options, leaseholds or other agreements by a corporation which has entered into an agreement with the United States of America pursuant to the New Community Act of 1968, (Title IV of the Housing and Urban Development Act of 1968, 42 U.S.C. 3901-3914), as amended, or a subsidiary or assign of such a corporation.
SDCL 47-9A-12