SDCL § 13-63-21.1: Excess contributions--Processing.

For each designated beneficiary, the balance in the qualified tuition program may not exceed the limits as defined in section 529 of the Internal Revenue Code. If the financial institution determines that a contribution would cause the account balance limit to be exceeded, the financial institution may only deposit that portion of the contribution, if any, that does not result in an excess balance. The financial institution shall return the excess to the contributor or permit the account owner to transfer the excess to another account in accordance with § 13-63-13. The program manager shall continuously monitor the current, cumulative balance in the accounts for each designated beneficiary.