1982, apparently at his office in Georgia. Diamond was unrepresented at the hearing, which was held the following day in New York, and the arbitrators decided to proceed and take Langston’s evidence. At the conclusion of the hearing, the arbitrators awarded petitioner $288,248.03 in damages, determined that Langston could retain the 208 undelivered rolls and assessed Diamond for the cost of the arbitration proceeding. Thereafter, petitioner commenced the instant proceeding to confirm the arbitration award. Respondent then cross-moved to vacate the award on the ground that the arbitrators violated rule 5 (c) of the arbitration rules of the Jute Carpet Backing Council, Inc., and, consequently, exceeded their authority. According to rule 5 (c) “After the serving of the Demand and Answer, if any, but before the appointment of the arbitrators, either party may make any new or different claim by giving notice as provided in subparagraph (a) above for the commencement of an arbitration. After the appointment of the arbitrators, no new or different claims may be made except with the consent of the arbitrators and all other parties.” It was Diamond’s position that petitioner’s letter of amendment constituted a “new or different claim” which was asserted after the arbitrators had been appointed and without respondent’s consent. Therefore, the arbitrators lacked the authority to consider the allegations contained in the amendment, and the award of $288,248.03 (amounting to more than $200,000 over the original demand) was improper. In opposition to the cross motion to vacate the award, Langston contended that respondent had actual notice of the amendment prior to the hearing and that, at any rate, Diamond had no meritorious defense since it had received the invoices for the goods in question. Special Term granted the cross motion, concluding that: “Although both notices are based upon the same contracts the amended notice sets forth new claims which are based upon different transactions which occurred later in time. Therefore, the arbitrators exceeded their authority by granting an award based upon matters not asserted in the original notice of intention to arbitrate. Also, consideration of the amended notice of intention to arbitrate was violative of the aforementioned consent requirement of the JCBC Rules.” The amendment at issue was, as the court correctly pointed out, based upon events which took place after the initial demand for arbitration was made and, as such, was clearly a new claim. Moreover, petitioner could have advanced the supplemental claim well before September 7, 1982, when the parties were informed of the appointment of the arbitrators, yet chose to wait until almost the eve of the hearing to do so. Nevertheless, an arbitration award will not generally be vacated because an arbitrator may have made a mistake of law or fact. (See
Matter of Raisler Corp. [New York City Housing Auth.], 32 NY2d 274 .) In
Matter of Raisler Corp. (supra, p 285 ), the Court of Appeals declared that it is a “fundamental principle in arbitration that unless otherwise provided in the arbitration agreement, errors of law, or what would be errors of law in a court of law, made by the arbitrator, will not be reviewed by the courts.” According to the court, when the arbitrator reaches a just result, the courts should properly refuse to intervene regardless of technicalities. Further, where the agreement involved contains a broad arbitration clause, compliance with such conditions precedent as notice provisions and time requirements should be resolved by the arbitrator.
(Matter of United Nations Dev. Corp. v Norkin Plumbing Co., 45 NY2d 358 ; see, also,
Matter of North Amer. Foreign Trading Corp. [Rosen], 58 AD2d 527 .) The arbitration award will, thus, be upheld unless the arbitrator’s construction of the disputed provision is completely irrational.
(Rodriguez v Consolidated Edison Co. of N. Y., 81 AD2d 811 ;
Matter of Connolly v Board of Educ., 53 AD2d 1041 .) In the instant matter, the arbitrator’s determination was not so irrational as to mandate that the award