S.D. Codified Laws § 58-15-62

In an annuity or pure endowment contract, other than a reversionary, survivorship, or group annuity, there shall be a provision that there shall be a period of grace of not less than thirty days, within which any stipulated payment to the insurer falling due after the first payment may be made, during which period of grace the contract shall continue in full force; but in case a claim arises under the contract on account of death prior to expiration of the period of grace before the overdue payment to the insurer or the deferred payments of the current contract year, if any, are made, the amount of such payments may be deducted from any amount payable under the contract in settlement.