No vehicle that is required to display a slow-moving vehicle emblem pursuant to § 32-15-20 may be operated during the period of day between one-half hour after sunset and one-half hour before sunrise on the following day on any public highway unless the vehicle has a flashing or rotating white or amber warning light placed on the vehicle. The warning light shall be clearly visible to motorists approaching from the rear. A violation of this section is a Class 2 misdemeanor.
S.D. Codified Laws § 32-17-46
Warning light on certain slow-moving vehicles during darkness--Violation as misdemeanor
Source: SL 1995, ch 182, § 1.
Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.