The court observed that the arbitrator's decision regarding costs, even if it departed from the initial agreement in the procedure document, did not warrant setting aside the award where the parties had given the arbitrator leave to decide their fate regarding costs at the close of the hearing. The court also noted that issues raised belatedly (such as the Reserve Bank authorization issue raised only in heads of argument) could properly be excluded by the arbitrator as being introduced "through the back door". The court implicitly endorsed the principle that amendments to claims during arbitration proceedings, when made under the stewardship of the arbitrator and with the agreement or participation of the parties, do not constitute a breach of natural justice.