The legislative body, shall, at the time of fixing the annual tax rate and levying the taxes to be collected for general city purposes, levy a special tax upon the taxable property in the city for the purpose of making advances under this part, and also for the purpose of paying installments of the assessment or of the interest thereon, which the city is required to pay under Section 8806, but not to exceed for each local improvement ten cents ($0.10) on each one hundred dollars ($100) of assessable property in any one year. The special tax shall be in addition to all other taxes levied for city purposes, and shall be computed, entered and collected in the same manner, and by the same persons and at the same time and with the same penalties and interest as are other taxes of the city.

This section applies only to bonds representing unpaid assessments, which assessments were confirmed before June 6, 1978.