Where approval by the Pension Benefit Guaranty Corp. is not required for the American Arbitration Association to increase its fees for arbitration, the lower court order was partially affirmed.The 7th U.S. Circuit Court of Appeals affirmed in part and reversed in part a decision by U.S. District Judge Thomas M. Durkin.The Multiemployer Pension Plan Amendments Act of 1980 amended the Employee Retirement Income Security Act by imposing liability on employers who withdraw, partially or completely, from participation in an …