In all cases, if there is more than one plaintiff or defendant a five-member panel shall be appointed regardless of the amount of damages involved. If there are two plaintiffs or defendants, each may select one member of the panel in the same manner as provided in § 21-25B-13. If there are more than two plaintiffs or defendants, then all plaintiffs or defendants shall agree upon their selections to the panel. If one or both of the panel members have not been selected by the plaintiffs or defendants within fifteen days, then the presiding judge of the circuit court shall appoint one or two members for the plaintiffs or defendants as the case may be.
SDCL 21-25B-15