California Code, Streets and Highways Code - SHC § 2110

(1) A sum equal to the total of all reimbursable snow removal costs filed pursuant to subdivision (d) of Section 2152, or seven million dollars ($7,000,000), whichever is less, shall be apportioned in 12 approximately equal monthly apportionments for snow removal or snow grooming, or both, on county roads as follows:

(2) If the total is less than seven million dollars ($7,000,000), the full amount of reimbursable snow removal or snow grooming, or both, costs shall be apportioned to the several counties in an amount equal to that computed pursuant to the report filed by each county pursuant to subdivision (d) of Section 2152.

(3) If the total is seven million dollars ($7,000,000) or more for the fiscal year, the Controller shall compute percentages for the apportionment of seven million dollars ($7,000,000) to the several counties in the state for snow removal or snow grooming, or both, on county roads, including the purchase of snow removal equipment therefor, and shall apportion the amount to the counties in the computed percentages. The percentage each county is to be apportioned during the fiscal year shall be derived by adding its reimbursable snow removal or snow grooming, or both, expenditures for the three preceding fiscal years as to which the Controller has received snow removal or snow grooming, or both, expenditure reports pursuant to Section 2152, and dividing the sum by the total amount of reimbursable snow removal or snow grooming, or both, expenditures by all counties in the state during those fiscal years.