9 U.S.C. § 10 : US Code - Section 10: Same; vacation; grounds; rehearing

      (a) In any of the following cases the United States court in and
    for the district wherein the award was made may make an order
    vacating the award upon the application of any party to the
    arbitration - 
        (1) where the award was procured by corruption, fraud, or undue
      means;
        (2) where there was evident partiality or corruption in the
      arbitrators, or either of them;
        (3) where the arbitrators were guilty of misconduct in refusing
      to postpone the hearing, upon sufficient cause shown, or in
      refusing to hear evidence pertinent and material to the
      controversy; or of any other misbehavior by which the rights of
      any party have been prejudiced; or
        (4) where the arbitrators exceeded their powers, or so
      imperfectly executed them that a mutual, final, and definite
      award upon the subject matter submitted was not made.

      (b) If an award is vacated and the time within which the
    agreement required the award to be made has not expired, the court
    may, in its discretion, direct a rehearing by the arbitrators.
      (c) The United States district court for the district wherein an
    award was made that was issued pursuant to section 580 of title 5
    may make an order vacating the award upon the application of a
    person, other than a party to the arbitration, who is adversely
    affected or aggrieved by the award, if the use of arbitration or
    the award is clearly inconsistent with the factors set forth in
    section 572 of title 5.