(a) If the tax first levied shall prove insufficient to pay the bonds, both the principal and interest, issued by the board on account of an improvement as provided in this chapter, as it shall become due and payable, the board shall, from time to time, make such further levies upon the property previously assessed for sums sufficient to complete the improvement and to pay such bonds and interest which shall be extended and collected in the same manner as the first levy. However, the total levy shall in no case exceed the value of the benefits assessed on the property with interest.
(b) The performance of the duties set forth in this section may be enforced by mandamus.