South Dakota Codified Laws
Chapter 20F - Loose Leaf Incense
Section 34-20F-5 - Product to be kept behind counter or in locked case--Violation as misdemeanor.

34-20F-5. Product to be kept behind counter or in locked case--Violation as misdemeanor.
Any retailer who offers loose leaf incense for sale shall display and offer the product for sale behind the counter or in a locked case so that a customer wanting access to the product must ask a store employee for assistance. A violation of this section is a Class 1 misdemeanor.

Source: SL 2012, ch 185, ยง4, eff. Mar. 2, 2012.