Section 15-6-23(a) - Prerequisites to a class actionOne or more members of a class may sue or be sued as representative parties on behalf of all only if:
(1) The class is so numerous that joinder of all members is impracticable;(2) There are questions of law or fact common to the class;(3) The claims or defenses of the representative parties are typical of the claims or defenses of the class;(4) The representative parties will fairly and adequately protect the interests of the class; and(5) The suit is not against this state for the recovery of a tax imposed by chapter 10-39, 10-39A, 10-43, 10-44, 10-45, 10-46, 10-46A, 10-46B, or 10-52.SDC 1939 & Supp 1960, § 33.0410; SD RCP, Rule 23 (a), as adopted by Sup. Ct. Order March 29, 1966, effective July 1, 1966; as amended by Sup. Ct. Order No. 2, March 31, 1969, effective July 1, 1969; SL 1982, ch 99, § 9; SL 1985, ch 15, § 31.