SDCL § 32-19-10: Safety chain slack and coupling--Violation as misdemeanor.

No more slack shall be left in safety chains, cables, or equivalent devices than shall be necessary to permit proper turning and the safety chains, cables, or equivalent device shall be so connected to the towed and towing vehicle and to the drawbar to prevent the drawbar from dropping to the ground if the drawbar fails and shall be of sufficient strength to control the trailer in event of failure of the regular trailer hitch or coupling. Any person who violates this section is guilty of a Class 2 misdemeanor.