S.D. Codified Laws § 3-13-89

A participant or a participant's surviving spouse may transfer a portion or all of the participant's account by rollover to another plan, which is eligible under § 401, 403(b), 408, 408A, or 457 of the Internal Revenue Code. A participant's beneficiary who is not the participant's surviving spouse may transfer a portion or all of the participant's account by rollover to a plan that is eligible under § 408 or 408A of the Internal Revenue Code.