There are exempted from the provisions of this chapter and from the tax imposed by it, gross receipts from the sale, resale, or leasing of farm machinery, attachment units, and irrigation equipment used exclusively for agricultural purposes. The term, farm machinery, includes all-terrain vehicles of three or more wheels used exclusively by the purchaser for agricultural purposes on agricultural land. The purchaser shall sign and deliver to the seller a statement that the all-terrain vehicle will be used exclusively for agricultural purposes.
SDCL 10-45-3.5