California Code, Family Code - FAM § 3767

(a) Notify the applicant for the assignment order or notice of assignment of the commencement date of the coverage of the child.

(b) Provide evidence of coverage and any information necessary for the child to obtain benefits through the coverage to both parents or the person having custody of the child and to the local child support agency when requested by the local child support agency.

(c) Upon request by the parents or person having custody of the child, provide all forms and other documentation necessary for the purpose of submitting claims to the insurance carrier which the employer or other person providing health insurance usually provides to insureds.