9 U.S.C. § 5 : US Code - Section 5: Appointment of arbitrators or umpire

Search 9 U.S.C. § 5 : US Code - Section 5: Appointment of arbitrators or umpire

If in the agreement provision be made for a method of naming or
appointing an arbitrator or arbitrators or an umpire, such method
shall be followed; but if no method be provided therein, or if a
method be provided and any party thereto shall fail to avail
himself of such method, or if for any other reason there shall be a
lapse in the naming of an arbitrator or arbitrators or umpire, or
in filling a vacancy, then upon the application of either party to
the controversy the court shall designate and appoint an arbitrator
or arbitrators or umpire, as the case may require, who shall act
under the said agreement with the same force and effect as if he or
they had been specifically named therein; and unless otherwise
provided in the agreement the arbitration shall be by a single
arbitrator.