After all benefits currently or potentially payable under any provision of this chapter have terminated, if the aggregate benefits paid to a member and the member's surviving spouse and minor children, including any distribution of the member's variable retirement account, are less than the member's accumulated contributions, the amount by which the accumulated contributions exceed total payments made to date shall be paid in a lump sum as provided in this section.
Amounts payable under this section shall be paid as follows:
If no claim for payment due upon the death of a deceased member is made within three years from date of death, the payment shall revert to the system. However, a claim may be honored after the expiration of the three-year reversion period if, in the opinion of the executive director, payment of the claim is warranted by exceptional circumstances.
SDCL 3-12C-409