Section 14-1430. Tax for unpaid assessments

The board of trustees shall
  include in the annual tax levy the principal or interest accruing during
  the same fiscal year upon bonds, notes or certificates  of  indebtedness
  issued  on  account of default in the payment of local assessments under
  this article, and shall levy the  same  upon  the  lots  or  parcels  in
  default.
    Such  principal  shall  be  apportioned  among  the lots or parcels in
  default so that the tax thereon will be the same as if an equal  portion
  of the assessment were then to be paid. Interest on an unpaid assessment
  shall  be  added  to  such  tax at the rate payable by the bond, note or
  certificate of indebtedness, which must be computed to the time when the
  principal or an instalment will become due;  or  if  no  principal  will
  become  due  during  the  fiscal year, then the interest accruing during
  that year upon the assessment must be levied upon such lot or parcel.