S.D. Codified Laws § 36-15-47
Any apprentice licensed pursuant to this chapter may practice cosmetology if the practice is performed only in a cosmetology, esthetics, or nail salon, as applicable, licensed pursuant to this chapter; the apprentice is under the constant supervision, control, and direction of a licensed instructor at all times; and the apprentice is actually engaged in the study and practice of cosmetology, esthetics, or nail technology at least forty hours a week. At the election of the apprentice, the apprenticeship may be pursued on a part-time basis, with a minimum of twenty hours per week. The apprentice may elect to revert to full-time status at any time by notifying the commission at least fifteen days prior to the change taking effect.
SDCL 36-15-47