High Quality Content by WIKIPEDIA articles! 14 Penn Plaza LLC v. Pyett, 556 U.S. ___ (2009), is a decision by the United States Supreme Court concerning the rights of unionized workers to sue their employer for age discrimination. In this 2009 decision, the Court decided that whenever a union contract "clearly and unmistakably" requires that all age discrimination claims under the Age Discrimination in Employment Act of 1967 (ADEA) be decided through arbitration, then employees subject to that contract cannot have those claims heard in court.