Cal. Welf. & Inst. Code § 11265.8

(a) All applicants for aid under this chapter, within 30 days of the determination of eligibility for Medi-Cal benefits under Chapter 7 (commencing with Section 14000), and 45 days for applicants already eligible for benefits under Chapter 7 (commencing with Section 14000), and all recipients of aid under this chapter within 45 days of a full or financial redetermination of eligibility for aid under this chapter, shall provide documentation that all children in the assistance unit not required to be enrolled in school have received all age appropriate immunizations, unless it has been medically determined that an immunization for a child is not appropriate or the applicant or recipient has filed with the county welfare department an affidavit that the immunizations are contrary to the applicant’s or recipient’s beliefs. If the county determines that good cause exists for not providing the required documentation due to lack of reasonable access to immunization services, the period shall be extended by an additional 30 days. A circumstance that shall constitute good cause includes, but is not limited to, the applicant or recipient does not have reasonable access to immunization services due to a situation of domestic violence. If the documentation is not provided within the required time period, the needs of all parents or caretaker relatives in the assistance unit shall not be considered in determining the grant to the assistance unit under Section 11450 until the required documentation is provided. The department shall track and maintain information concerning the number of sanctions imposed under this section.
(b) At the time of application and at the next redetermination of eligibility for aid under this chapter, all applicants and recipients shall be given notice advising them of their obligation to secure the immunizations required in subdivision (a). The notice shall also contain all of the following:
1. (1) The Recommended Childhood Immunization Schedule, United States, and the Recommended Immunization Schedule for Children Not Immunized on Schedule in the First Year of Life, as appropriate, approved as of January 1, 2025, by the Advisory Committee on Immunization Practices, the American Academy of Pediatrics, and the American Academy of Family Physicians, and any modification or supplement thereto by the State Department of Public Health, including the recommended immunization schedule, in accordance with Section 120164 of Health and Safety Code. Notwithstanding the rulemaking provisions of the Administrative Procedure Act (Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code), the department may implement any policy changes required pursuant to this paragraph by means of all-county letters or similar instructions from the department until regulations are adopted. These all-county letters or similar written instructions shall have the same force and effect as regulations until the adoption of regulations, which shall occur no later than June 30, 2027.
2. (2) A description of how to obtain the immunizations through a fee-for-service provider that accepts Medi-Cal, a Medi-Cal managed care plan, a county public health clinic, or any other source that may be available in the county as appropriate.
3. (3) A statement that the applicant or recipient may file an affidavit claiming that the immunizations are contrary to the applicant’s or recipient’s beliefs.