(1) A document of gift signed by the authorized person; or
(2) An oral communication by the authorized person that is electronically recorded or is contemporaneously reduced to a record and signed by the person receiving the oral communication.
(b) An anatomical gift by a person authorized by section nine of this article may be amended or revoked orally or in writing by any member of a prior class who is reasonably available. If more than one member of the prior class is reasonably available, the gift made by the authorized person may be revoked only if a majority of the members of the same class are opposed to the anatomical gift. In the event of a tie vote, a health care surrogate shall be appointed to decide whether to honor, amend or revoke the anatomical gift of the decedent's body or part.
(c) A revocation under subsection (b) of this section is effective only if, before an incision has been made to remove a part from the donor's body or before invasive procedures have begun to prepare the recipient, the procurement organization, transplant hospital or physician or technician knows of the revocation.