Ask the court to approve (confirm) or correct an arbitrator's decision (award) in an arbitration done under an agreement between the parties. As noted above, an Arbitration Award may also be vacated where the Award or the Arbitrators decision expresses a "manifest disregard of the law".The Federal Arbitration Act. The federal common law allows arbitrators to correct facially apparent mistakes, clarify ambiguities, and complete incomplete awards. (Teamsters, supra, 109 F. On what grounds may a court vacate an award under the FAA? Federal arbitration law also dictates that parties cannot agree to additional grounds to vacate an award.