S.D. Codified Laws § 51A-6A-43
The owners of any insolvent trust company and its creditors may formulate a plan for the reorganization of the trust company while the trust company is in the charge of the director or a special assistant or a receiver at any time before a dividend has been paid. The creditors of the insolvent trust company may formulate a plan for the reorganization of the trust company. If the plan is subscribed to in writing by creditors having not less than eighty percent of the known claims against the trust company, a copy of the plan is filed with the director, and the director approves the plan, the plan is legal, valid, and binding upon all creditors of the insolvent trust company to the same extent and with the same effect as if all of the creditors had joined in the execution of the plan.
SDCL 51A-6A-43