S.D. Codified Laws § 58-11-41
If any policy of life or health insurance delivered in this state is reinstated or renewed, and the insured or the beneficiary or assignee of the policy makes written request to the insurer for a copy of the application, if any, for such reinstatement or renewal, the insurer shall, within thirty days after receipt of such request at its home office, deliver or mail to the person making such request a copy of such application reproduced by any legible means. If such copy is not so delivered or mailed after having been so requested, the insurer shall be precluded from introducing the application in evidence in any action or proceeding based upon or involving the policy or its reinstatement or renewal. In the case of such a request from a beneficiary, the time within which the insurer is required to furnish a copy of such application shall not begin to run until after receipt of evidence satisfactory to the insurer of the beneficiary's vested interest in the policy or contract.
SDCL 58-11-41