Sec. 541.256.  PREREQUISITES TO CLASS ACTION.  The court shall permit one or more members of a class to sue or be sued as representative parties on behalf of the class 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;  and
(4)  the representative parties will fairly and adequately protect the interests of the class.
Added by Acts 2003, 78th Leg., ch. 1274, Sec. 2, eff. April 1, 2005.