(a) Representation. - If persons constituting a class are so numerous as to make it impracticable to bring them all before the court, such of them, one or more, as will fairly insure the adequate representation of all may, on behalf of all, sue or be sued.(b) Secondary action by shareholders. - In an action brought to enforce a secondary right on the part of one or more shareholders or members of a corporation or an unincorporated association because the corporation or association refuses to enforce rights which may properly be asserted by it, the complaint shall be verified by oath.(c) Dismissal or compromise. - A class action shall not be dismissed or compromised without the approval of the judge. In an action under this rule, notice of a proposed dismissal or compromise shall be given to all members of the class in such manner as the judge directs.(d) Tax Class Actions. - In addition to all of the requirements set out in this rule, a class action seeking the refund of a State tax paid due to an alleged unconstitutional statute may be brought and maintained only as provided in G.S. 105-241.18.Amended by 2008 N.C. Sess. Laws 107,s. 28.28.(a), eff. 10/1/2008.