§ 7509. Modification of award by arbitrator. On written application of
a party to the arbitrators within twenty days after delivery of the
award to the applicant, the arbitrators may modify the award upon the
grounds stated in subdivision (c) of section 7511. Written notice of the
application shall be given to other parties to the arbitration. Written
objection to modification must be served on the arbitrators and other
parties to the arbitration within ten days of receipt of the notice. The
arbitrators shall dispose of any application made under this section in
writing, signed and acknowledged by them, within thirty days after
either written objection to modification has been served on them or the
time for serving said objection has expired, whichever is earlier. The
parties may in writing extend the time for such disposition either
before or after its expiration.