SDCL § 32-12A-43: Operation of commercial motor vehicle with any measurable or detectable amount of alcohol in system prohibited.

Notwithstanding any other provision of this chapter, no person may drive, operate, or be in actual physical control of a commercial motor vehicle within this state while having any measurable or detectable amount of alcohol in that person's system. A person who drives, operates, or is in actual physical control of a commercial motor vehicle within this state while having any measurable or detectable amount of alcohol in that person's system or who refuses to submit to an alcohol test under § 32-12A-46, shall be placed out of service for twenty-four hours.