California Code, Government Code - GOV § 51936

If a majority of the votes cast in the largest city or if a majority of the votes in the county as a whole (including the largest city and the other cities) is against reorganization and charter adoption, reorganization shall not be accomplished, the charter shall not be adopted, and proceedings for the reorganization of the cities and county shall not be initiated within fifteen (15) days after the result of the election has been declared.