On October 16, 2018, the County updated the Cannabis Ordinance which went into effect on November 15, 2018.

• Part 1 had a limited scope focused on neighborhood compatibility issues and aligning the Ordinance with state law where appropriate.
• Part 2 will include a more thorough review of neighborhood compatibility and other implementation efforts that require robust outreach and staff analysis.

• October 2019, Gov. Gavin Newsom signed AB 37.  In 2020, CA will permit state deductions for cannabis companies that file their taxes as sole proprietors or partnerships.
• January 2019 –The final cannabis regulations that were published by California’s three cannabis licensing agencies (the Bureau of Cannabis Control, the Department of Food & Agriculture, and the Department of Public Health)  in December 2018.
• The 2018 Farm Bill allows broad hemp cultivation; allows the transfer of hemp-derived products across state lines for commercial or other purposes, and no restrictions on the sale, transport, or possession of hemp-derived products, so long as those items are produced in a manner consistent with the law.
• California joined the programs and on November 16, 2017 released emergency regulations, the Medical and Adult Use Cannabis Regulation and Safety Act (MAUCRSA).
• The California  passed a bill in June 2017 that integrated MCRSA with AUMA to create the Medicinal and Adult‐Use Cannabis Regulation and Safety Act (MAUCRSA). Under MAUCRSA, a single regulatory system governs the medical and adult use cannabis industry in California.
• Citizens of California passed Prop 64 to include Adult Use cannabis marketplace, of which Sonoma County voted 59% in favor.
• California passed legislation in 2016 to establish Medical Cannabis Regulation and Safety Act (MCRSA).