SDCL § 32-15-13: Directional turn signals required--Misdemeanor--Motorcycles and agricultural vehicles excepted.

It is a Class 2 misdemeanor for any person to sell or offer for sale any new motor vehicle, excepting motorcycles, farm tractors, and vehicles used primarily for the distribution and application of agricultural fertilizer or chemicals, when drawn by another vehicle, unless it is equipped with directional turn signals.