Mass Action Law and Legal Definition

Mass action means a civil action in which monetary relief claims of 100 or more persons are proposed to be tried jointly on the ground that the plaintiffs' claims involve common questions of law or fact, except that jurisdiction shall exist only over those plaintiffs whose claims in a mass action satisfy the statutory jurisdiction amount. [La. ex rel. Caldwell v. Allstate Ins. Co., 536 F.3d 418, 423-424 (5th Cir. La. 2008)]