Cal. RTC § 196.67

On or before December 31, 1993, each eligible county, as described in Section 196.65, shall compute and remit to the Controller for deposit in the General Fund an amount equal to the amount allocated to it by the Controller pursuant to Section 196.65, less the actual amount of its property tax revenue lost in the immediately preceding fiscal year on the regular secured and supplemental rolls with respect to eligible properties as a result of the reassessment of those properties pursuant to Section 170, excluding any property tax revenue lost by school districts (other than basic state and school districts), county offices of education, and community college districts. For purposes of this section, “basic state aid school district” means any school district that does not receive a state apportionment pursuant to subdivision (h) of Section 42238 of the Education Code, but receives from the state only a basic apportionment pursuant to Section 6 of Article IX of the California Constitution. If the amount computed pursuant to this subdivision for an eligible county described in this subdivision is less than zero, the Controller shall allocate that amount to the county.