S.D. Codified Laws § 43-30 app. 5-19
Current with legislation signed by the governor on or before 3/6/2024
A durable power of attorney, which contains the words "this power of attorney is not affected by subsequent disability or incapacity of the principal" or similar words showing the intent of the principal that the authority conferred is exercisable notwithstanding the subsequent disability of the principal and all acts done by an attorney in fact pursuant to a durable power of attorney during any period of disability or incapacity of the principal shall bind the principal and the principal's successors in interest as if the principal were competent and not disabled.
SDCL app TO CHAPTER 43-30 § 5-19