S.D. Codified Laws § 23A-27A-44

As to any defendant who has been sentenced to death and who is awaiting execution prior to July 1, 2008, the amendment and repeal of existing sections and enactment of new sections in this chapter do not impair or affect any act done, offense committed, or right accruing, accrued, or acquired, or liability, penalty, forfeiture, or punishment incurred prior to July 1, 2008. However, the provisions of existing statute may be asserted, enforced, prosecuted, or inflicted, as fully and to the same extent as if the amendment and repeal of existing sections and enactment of new sections in this chapter had not been subsequently enacted.