July 7, 2011: A series of union concessions between YRC Worldwide Inc. and the International Brotherhood of Teamsters is in jeopardy again after a federal appeals court restored a legal challenge by rival trucker ABF Freight System Inc.

In a ruling released Wednesday, the 8th U.S. Circuit Court of Appeals in St. Louis overturned a lower court’s decision that ABF lacked standing to challenge the agreements.

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