S.D. Codified Laws § 13-55E-11
If the beneficiary dies, is not admitted to an institution of higher education following proper application, elects to not attend an institution of higher education or if attending, elects to discontinue higher education or for any other circumstance approved by the executive director does not utilize the advance payment contract, the executive director shall terminate or modify the contract and except as provided under § 13-55E-3, refund to the purchaser, to any person designated by the purchaser by contract or to the legal representative of the purchaser, the amount of the one-time advance payment together with interest compounded annually at a rate of four percent. A purchaser or other qualified person may request a refund in accordance with this section at any time following the one-time advance payment. The amount of refund payable under this section shall be proportionately reduced for each academic semester the beneficiary attends an institution of higher education.
SDCL 13-55E-11