S.D. Codified Laws § 34-12D-18 (2026)
This chapter does not affect the right of a patient to make decisions regarding the use of life-sustaining treatment, so long as the patient is able to do so, or impair or supersede a right or responsibility that a person has to effect the withdrawal or withholding of medical care.
Source: SL 1991, ch 273 , § 17.