S.D. Codified Laws § 32-38-1
Except as provided in chapter 32-37 and § 32-38-3, every operator and front seat passenger of a passenger vehicle operated on a public highway in this state shall wear a properly adjusted and fastened safety seat belt system, required to be installed in the passenger vehicle when manufactured pursuant to Federal Motor Vehicle Safety Standard Number 208 ( 49 C.F.R. 571.208 ) in effect January 1, 1989, at all times when the vehicle is in forward motion. The driver of the passenger vehicle shall secure or cause to be secured a properly adjusted and fastened safety seat belt system on any passenger in the front seat who is at least five years of age but younger than eighteen years of age. Any violation of this section is not a moving traffic offense under the provisions of § 32-12-49.1.
SDCL 32-38-1