On or before the first day of September of each year, each city or county in which any agricultural preserve is located shall file with the Director of Conservation a map of each city or county and designate thereon all agricultural preserves in existence at the end of the preceding fiscal year.
Source:
Section 51237.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=51237.5..