Cal. Sts. & High. Code § 8803

If a county or a city whose taxes are collected by the county is conducting the proceedings and the county or city has advanced available funds either in performance of its obligations in proceedings wherein the assessment was levied prior to September 17, 1986, or under subdivision (a) of Section 8769, or voluntarily under subdivision (b) of Section 8769, the tax collector shall account to the county or the city for any moneys received upon redemption or from the sale of the property. In that case, for the purposes of this division, the county or the city shall be entitled to reimbursement of any amounts so advanced from any moneys so received.