WASHINGTON, D.C. - The U.S. Supreme Court on Jan. 21 declined to decide whether the citizenship of the individuals on whose behalf a state brought restitution claims in a price-fixing case satisfies the Class Action Fairness Act's (CAFA) minimal diversity requirement for a "mass action" (AU Optronics Corporation, et al. v. State of South Carolina, No. 12-911, U.S. Sup.).