S.D. Codified Laws § 55-16-14
Multiple qualified dispositions in same trust instrument
If more than one qualified disposition is made by means of the same trust instrument:
(1) The making of a subsequent qualified disposition shall be disregarded in determining whether a creditor's claim with respect to a prior qualified disposition is extinguished as provided in § 55-16-10 ; and
(2) Any distribution to a beneficiary is deemed to have been made from the latest such qualified disposition.
Source: SL 2005, ch 261, § 14.