B. If a new trial of the issue of just compensation is ordered, either in the trial court or upon appeal, upon an exception by an owner with respect to the insufficiency of the award of just compensation, and the subsequent report of the award of just compensation, which is confirmed, is for the same or a lesser total amount, the court shall (i) tax all the costs of the new trial against the owner making such exception and (ii) order repayment to the petitioner of any sum paid to such owner out of the fund paid into court by the petitioner in excess of the total sum ascertained by the second report with interest thereon from the date the original payment was made to such owner until the date such excess is repaid to the petitioner. Interest accruing thereon prior to July 1, 1970, shall be paid at the rate of five percent annually; interest accruing thereafter and prior to July 1, 1981, shall be paid at the rate of six percent annually; interest accruing thereafter and prior to July 1, 2003, shall be paid at the rate of eight percent annually; and interest accruing thereafter shall be paid at the general account’s primary liquidity portfolio rate, compiled by the Department of the Treasury for the month in which the original payment was made to such owner.