S.D. Codified Laws § 32-15-2.9
Current with legislation signed by the governor on or before 3/6/2024
No sunscreening devices may be placed on or affixed to a windshield so as to obstruct or reduce the driver's clear view through the windshield. No film may be extended downward beyond the AS-1 line or more than the lowest point of the sun visor of the motor vehicle. A violation of this section is a Class 2 misdemeanor.
SDCL 32-15-2.9