California Code, Health and Safety Code - HSC § 120164

(a) Consistent with subdivision (b), the list of immunizations, items, and services that were recommended by the United States Preventive Services Task Force (USPSTF), the Advisory Committee on Immunization Practices (ACIP), and the Health Resources and Services Administration (HRSA), and that were in effect on January 1, 2025, shall serve as the baseline recommendations for purposes of this section.

(b) The State Department of Public Health may modify or supplement the baseline recommendations described in subdivision (a).  In making modifications or supplements, the department shall take into consideration guidance and recommendations from additional medical and scientific organizations, including, but not limited to, the American Academy of Pediatrics, the American College of Obstetricians and Gynecologists, and the American Academy of Family Physicians.

(c) In modifying or supplementing the baseline recommendations, the department may also incorporate subsequent evidence-based recommendations issued by the USPSTF, ACIP, or HRSA, to the extent the department determines those recommendations are consistent with the purposes of this section and promote public health.

(d) Publishing the baseline recommendations or any modification or supplement adopted pursuant to this section shall be exempt from the administrative regulation and rulemaking requirements of Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code.

(e) The department shall publish the recommendations of immunizations, items, and services, and publish any updates, modifications, or supplements adopted pursuant to this section.  Any modification or supplement shall be deemed effective on the date of publication.  The recommendations and schedules shall be filed with the Secretary of State and published in the California Code of Regulations.