CINCINNATI - Employers that are challenging the amount of reallocation liability assessed by a multiemployer pension plan must arbitrate their claims prior to bringing their dispute in federal court, the Sixth Circuit U.S. Court of Appeals ruled March 4 (Knall Beverage, Inc., et al. v. Teamsters Local Union No. 293 Pension Plan, et al., No. 13-3698, 6th Cir.; 2014 U.S. App. LEXIS 3981).