527. Appointment of sole arbitrator in case of default.

Unless the parties1 otherwise agree, where each of two parties to an arbitration agreement2 is to appoint an arbitrator3 and one party (the 'party in default') refuses to do so, or fails to do so within the time specified4, the other party, having duly appointed his arbitrator, may give notice5 in writing6 to the party in default that he proposes to appoint his arbitrator to act as sole arbitrator7. If the party in default does not within seven clear days of that notice being given make the required appointment, and notify the other party that he has done so,