Cal. Sts. & High. Code § 9317

The legislative body may, and in the event of demand by the tax collector therefor as provided in Section 9315 shall, at the time of fixing the annual tax rate and levying the taxes to be collected for general municipal purposes, levy a special tax upon the taxable property in the city for the purpose of paying for the lands purchased or to be purchased at delinquency sales held pursuant to this division, or for the purpose of paying installments of the reassessment or of interest which the city is required to pay, but not to exceed for each district, the bonds of which are refunded, ten cents ($0.10) on each one hundred dollars ($100) of assessable property.