Okla. Stat. tit. 15, § 804
If the arbitration agreement provides a method of appointment of arbitrators, this method shall be followed. In the absence of such provisions, or if the agreed method fails or for any reason cannot be followed, or when an arbitrator appointed fails or is unable to act and his successor has not been appointed, the court on application of any party to the agreement shall appoint an arbitrator. An arbitrator so appointed has the same powers as the arbitrator specifically named in the agreement.
Laws 1978, SB 627, c. 308, § 4, eff. October 1, 1978.