Cal. Health and Safety Code § 120405

(a) A local health officer, or consortium of local health officers, may establish permanent, temporary, or mobile sites and programs, for the purpose of immunizing children, or performing outreach to refer parents to other programs that provide immunizations and comprehensive health services. These sites for referral or immunization may include, but are not limited to, the following: (1) Public places where parents of children at high risk of remaining unimmunized reside, shop, worship, or recreate. (2) School grounds, either during regular hours, or evening hours or on weekends. (3) On or adjacent to sites of public- or community-based agencies or programs that either provide or refer persons to public assistance programs or services. (b) Outreach programs shall, to the extent feasible, include referral components intended to link immunized children with available public or private primary care providers, in order to increase access to continuing pediatric care, including subsequent immunization services as necessary.