(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
(1) where the award was procured by corruption, fraud, or undue
(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.