In South Dakota, which occupants of a vehicle must wear seat belts or suitable child restraints?

South Dakota law requires the driver, front-seat passengers, and passengers under the age of 18 to wear appropriate safety restraints while the vehicle is in motion. Small children should be secured in the rear seat. Still, even rear-seat passengers who are at least 18 years of age should wear seat belts. Seat belts have been proven to save lives and reduce injuries – even in the rear seat.