SDCL § 38-20A-27: Unregistered pesticides--Prohibitions--Change in labeling or formula.

No person may knowingly or willfully distribute, sell, or offer for sale within this state any pesticide which is not registered under the provisions of §§ 38-20A-4 to 38-20A-13, inclusive; or any pesticide if any of the claims made or any of the directions for the pesticide's use differ in substance from the representations made in connection with its registration; or any pesticide if the composition of the pesticide differs from the composition represented in its registration. The secretary may allow a change in the labeling or formula of a pesticide within a registration period without requiring reregistration of the pesticide.