Cal. Gov. Code § 26914
Notwithstanding the provisions of Section 26912, in any county in which the county superintendent of schools became fiscally independent on or after June 30, 1977, the apportionment of the revenue derived from the unsecured roll by applying the county ad valorem tax rate provided pursuant to subdivision (b) of Section 2237 of the Revenue and Taxation Code shall be made as if the county superintendent of schools had in fact derived revenue from the unsecured roll in the 1977-78 fiscal year based on the county superintendent's tax rate on the secured roll in that year. The factors determined pursuant to subdivision (b) of Section 26912 shall be adjusted accordingly and there shall be added to the total amount of property tax revenue received by the county superintendent of schools in the 1977-78 fiscal year an amount equal to the amount of such revenue from the unsecured roll.
Ca. Gov. Code § 26914