Cal. Health & Safety Code § 7150.20

(a) A donor may make an anatomical gift through any of the following:
1. (1) By authorizing a statement or symbol indicating that the donor has made an anatomical gift to be imprinted on the donor’s driver’s license or identification card and included on a donor database registry.
2. (2) Directly through the Donate Life California Organ and Tissue Donor Registry Internet Web site.
3. (3) In a will.
4. (4) During a terminal illness or injury of the donor, by any form of communication that clearly expresses the donor’s wish, addressed to at least two adults, at least one of whom is a disinterested witness. The witnesses shall memorialize this communication in a writing and sign and date the writing.
5. (5) As provided in subdivision (b).
(b) A donor or other person authorized to make an anatomical gift under Section 7150.15 may make a gift by a donor card or other record signed by the donor or other person making the gift or by authorizing that a statement or symbol, indicating that the donor has made an anatomical gift, be included on a donor registry. If the donor or other person is physically unable to sign a record, the record may be signed by another individual at the direction of the donor or other person and shall comply with all of the following:
1. (1) Be witnessed by at least two adults, at least one of whom is a disinterested witness, who have signed at the request of the donor or the other person.
2. (2) State that it has been signed and witnessed as provided in paragraph (1).
(c) Revocation, suspension, expiration, or cancellation of a driver’s license or identification card upon which an anatomical gift is indicated does not invalidate the gift.
(d) An anatomical gift made by will takes effect upon the donor’s death whether or not the will is probated. Invalidation of the will after the donor’s death does not invalidate the gift.
(e) Notwithstanding subdivision (i) of Section 7150.65, a document of gift may designate a particular physician to carry out the recovery procedures. In the absence of this designation, or if the designee is not reasonably available or is deemed by the organ procurement organization not to be qualified to perform the required procedure, the organ procurement organization may authorize another physician or technician to carry out the recovery.