Cal. Rev. & Tax. Code § 187

On or before December 31, 1986, each eligible county 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 183, less the amount of its property tax revenue lost in the 1985–86 fiscal year as a result of the reassessment pursuant to Section 170 of that property which was damaged or destroyed by the storms and floods of February 1986. If the amount computed pursuant to this section for an eligible county is less than zero, the Controller shall allocate that amount to the county.