Cal. Health & Safety Code § 7150.10
(a) As used in this chapter, the following terms have the following meanings:
(2) “Agent” means an individual who meets either of the following criteria:
(6) “Document of gift” means a donor card or other record used to make an anatomical gift. The term includes a statement recorded on the Donate Life California Organ and Tissue Donor Registry or other donor registry.
(6.5) “Domestic partner” means a person who is registered under Section 297 of the Family Code, or otherwise recognized under the law of any state as a domestic partner.
(27) “Sign” means, to do either of the following with the present intent to authenticate or adopt a record: