Cal. Health & Safety Code § 11362.715
(a) A person who seeks an identification card shall pay the fee, as provided in Section 11362.755, and provide all of the following to the county health department or the county’s designee on a form developed and provided by the department:
(b) If the person applying for an identification card lacks the capacity to make medical decisions, the application may be made by the person’s legal representative, including, but not limited to, any of the following: