Cal. Gov. Code § 25550.5
By unanimous vote, the board of supervisors of any county owning any property situated in any city, which real property has been improved for use as a public park, amusement or recreational purposes, may, upon a finding that the park, amusement or recreational area is local in character, convey such park, amusement or recreational area to the city for public park, amusement or recreational purposes without consideration other than the agreement of the city to maintain such area as a public park, amusement or recreational area for the benefit and use of all residents of the county.
By unanimous vote, the board of supervisors of any county, upon transferring a park, amusement or recreational area pursuant to the provisions of this section, may convey to the city for continued use on that park, amusement or recreational area only such personal property as is at the time of transfer located on said park, amusement or recreational area. Such transfer may also be without consideration other than the agreement of the city to maintain such personal property for use on that park, amusement or recreational facility.
Ca. Gov. Code § 25550.5