Where an arbitration agreement to refer future disputes to arbitration provides that any claim to which the agreement applies shall be barred unless some step to commence arbitration proceedings is taken within a time fixed by the agreement, and a dispute arises to which the agreement applies, the court, if it is of the opinion that in the circumstances of the case undue hardship would otherwise be caused, may extend the time for such period as it considers proper, whether the time so fixed has expired or not, on such terms and conditions as it may consider just but subject to the provisions of any law limiting the time for commencing arbitration proceedings.