Assisted living, congregate care, group care, rehabilitation, community care, and other similar residential and health care facilities intended for the care of persons in need of medical or nursing care, personal care, developmental and supportive services, supervision, or assistance essential for sustaining the activities of daily living, except in the HC and AV Districts where such uses shall not be permitted. (However, the provisions of this chapter shall not apply to care facilities that serve a limited number of persons and which the State Health and Safety Code and the Welfare and Institutions Code state shall be permitted in all residential zones without a conditional use permit.)