(1) This section applies if unless otherwise agreed by the parties.(a) an arbitral tribunal makes an award for the payment of an amount of money; and(b) under the award, the amount is to be paid by a particular day (the " due date " ) (2) The arbitral tribunal may direct that interest, including compound interest, is payable if the amount is not paid on or before the due date.(3) The arbitral tribunal may set a reasonable rate of interest.(4) The interest is payable (a) from the day immediately following the due date; and(b) on so much of the money as remains unpaid.(5) The direction is taken to form part of the award.