California Code, Education Code - EDC § 48216

(a) The county office of education or the governing board of the school district of attendance shall exclude any pupil who has not been immunized properly pursuant to Chapter 1 (commencing with Section 120325) of Part 2 of Division 105 of the Health and Safety Code.

(b) The governing board of the district shall notify the parent or guardian of the pupil that they have two weeks to supply evidence either that the pupil has been properly immunized, or that the pupil is exempted from the immunization requirement pursuant to Section 120365 or 120370 of the Health and Safety Code.

(c) The governing board of the district, in the notice, shall refer the parent or guardian of the pupil to the pupil's usual source of medical care to obtain the immunization, or if no usual source exists, either refer the parent or guardian to the county health department, or notify the parent or guardian that the immunizations will be administered at a school of the district.