California Code, Government Code - GOV § 27421

The county assessor in each county who is designated to perform the duty of assessing property for a local taxing jurisdiction shall, upon request of the governing body of such jurisdiction, excluding a school district, furnish not later than May 15th of each year an estimate of the assessed valuation of property within such jurisdiction for the succeeding fiscal year. Such request shall be made on or before February 20th of each year. The estimate required herein shall contain estimates of the total of each of the items contained on the assessment roll as well as the estimated total valuation.