SDCL § 32-12A-41: Disqualification for conviction within three-year period of three serious traffic violations.

Any person is disqualified from driving a commercial motor vehicle for not less than one hundred twenty days if convicted within a three-year period of three serious traffic violations committed while operating a commercial motor vehicle. Any person is disqualified from driving a commercial motor vehicle for a period of not less than one hundred twenty days if convicted within a three-year period of three serious traffic violations committed while operating a noncommercial motor vehicle and any of these convictions result in the revocation, cancellation, or suspension of the holder's commercial learner's permit, commercial driver license, or noncommercial driving privileges. Any disqualification period imposed under this section shall be in addition to any other previous period of disqualification.