SDCL § 10-50-6: Stamped cigarettes not subject to further tax--Person in possession of unstamped cigarettes liable for tax and penalty.

Any cigarette on which a tax has been paid, the payment being evidenced by the affixing of the stamp, is not subject to a further tax under this chapter. However, any person, who possesses two thousand or more cigarettes that do not bear a tax stamp indicating that the South Dakota cigarette tax has been paid, shall pay the tax imposed pursuant to § 10-50-3 plus a penalty equal to ten percent of the total tax due.