S.D. Codified Laws § 47-14A-4

A governing instrument may provide that the interest of any beneficial owner who fails to make any contribution that the beneficial owner is obligated to make shall be subject to specific penalties for, or specified consequences of, such failure. Such penalty or consequence may take the form of reducing or eliminating the defaulting beneficial owner's proportionate interest in the business trust, subordinating the beneficial interest to that of nondefaulting beneficial owners, a forced sale of the beneficial interest, forfeiture of the beneficial interest, the lending by other beneficial owners of the amount necessary to meet the beneficiary's commitment, a fixing of the value of the defaulting beneficial owner's beneficial interest by appraisal or by formula and redemption or sale of the beneficial interest at such value, or any other penalty or consequence.