Cal. Gov't Code § 43073

(a) The legislative body of any city which is encompassed entirely within the territory of a special district may elect to pay the district an amount equal to the amount the district would derive from its share of property tax allocations applicable to all property within the incorporated limits of the city.
(b) If a legislative body makes an election pursuant to subdivision (a), the county auditor shall reallocate property taxes due to the special district within the incorporated limits of the city to the city.
The county auditor shall report to the State Controller the amount of property taxes reallocated to a city pursuant to this subdivision, as well as the total amount of property taxes allocated to the city pursuant to Chapter 6 (commencing with Section 95) of Part 0.5 of Division 1 of the Revenue and Taxation Code. No reallocation made pursuant to this subdivision shall affect any allocations of property tax revenues to the city or special district in subsequent fiscal years pursuant to Chapter 6 (commencing with Section 95) of Part 0.5 of Division 1 of the Revenue and Taxation Code.
(c) If a city legislative body makes an election pursuant to subdivision (a), and upon apportionment of taxes by the county, the reallocated amounts shall be paid by the city or transferred by the county auditor to the district.
(d) If the legislative body of a city makes an election pursuant to subdivision (a), the legislative body shall notify the county auditor by no later than the first day of September of the fiscal year in which the election becomes effective.
(e) For purposes of this section, “special district” means any special district where the county board of supervisors act as, or has appointed, the governing body of the districts providing fire or library services to one or more cities or any county library service established under Chapter 2 (commencing with Section 27151) of Division 20 of the Education Code provided for one or more cities, if all property within the city is taxed to support the service.
(f) This section does not apply in any case in which a city is making the payments described in this section to a district on the effective date of this section.
(g) If any additional costs are incurred by a county as a result of an election under this act by a city, the county may collect the costs from the city.
(h) This section applies only to cities which are in counties which have a population of 6,000,000 or more.