S.D. Codified Laws § 34-20-26
Nothing in § 34-20-24 shall be construed to prohibit or interfere with the Fish and Wildlife Service of the United States Department of the Interior from laying out poison for the control of ground squirrels, pocket gophers, mice, prairie dogs, rabbits, and other food, crop, and tree destroying rodents or magpies.
Nothing in § 34-20-24 shall be construed to prohibit or interfere with departments of the State of South Dakota, boards of county commissioners, officers of organized townships, and incorporated municipalities from laying out poison for the control of the above named rodents and magpies and insects when co-operating with and acting on the advice of said Fish and Wildlife Service of the United States Department of the Interior.
SDCL 34-20-26