Interest on compensation.

If the sum. which in the opinion of the court. the Collector ou&ht ·O have awarded as compensation. is in excess of the sum which the Collector did award as ~om;>ensation. the aM1rd of the coun may direct that the Collector shall pay interest on such excess at the rate of nine percent per annum from the dare on which the damage was caused to the date of payment of such excess into the court: Provided that the award of the court may also direct that where such excess or pan lhcrcor is paid into the court after the dale or expiry of one year from the date on which the damage was caused, interest at •he rate or fifteen percent per annum shall be payable from the date or expiry of the said period ol one year on the amount ol such l>XCC>S or pan thereof which has net been paid into the court before the date of such expiry.