California Code, Government Code - GOV § 65850.1

(a) The legislative body of any city or county may adopt an ordinance or other regulation governing the issuance of permits to engage in the use of property for occasional commercial filming on location.  This section shall not limit the discretion of a city or county to limit, condition, or deny the use of property for occasional commercial filming on location to protect the public health, safety, or welfare.

(b) All ordinances and regulations enacted by a city or county regulating by permit the use of property for occasional commercial filming on location shall not be subject to zoning ordinances or other land use regulations of that jurisdiction unless the filming ordinance or regulation expressly states that it is subject to, or governed by, those zoning ordinances or other land use regulations.

(c) The use of property for occasional commercial filming on location engaged in pursuant to a filming permit issued by a city or county shall be permitted in any zone unless the zoning ordinance or other land use regulations of the jurisdiction expressly prohibit filming in that zone.