(a) Subject to section eight of this article, a donor or a person authorized pursuant to section four of this article may amend or revoke an anatomical gift by:

(1) (A) A record signed and dated by the donor or the authorized person.

(B) If the donor or the authorized person is physically unable to sign a record, another individual may sign at the direction of the donor or the authorized person if the document of gift:

(i) Is witnessed and signed by at least two adults, at least one of whom is a disinterested witness; and

(ii) Contains a statement that it has been signed and witnessed as required by subparagraph (i) of this paragraph; or

(2) A later-executed document of gift that amends or revokes a previous anatomical gift, or portion of an anatomical gift, either expressly or by inconsistency.

(b) Subject to section eight of this article, a donor or a person authorized by section four of this article may revoke an anatomical gift by destroying or cancelling the document of gift, or the relevant portion of the document of gift, with the intent to revoke the gift.

(c) During a terminal illness or injury, a donor may amend or revoke an anatomical gift that was not made in a will by any form of communication addressed to at least two adults, at least one of whom is a disinterested witness.

(d) A donor who makes an anatomical gift in a will may amend or revoke the gift in the manner provided for amendment or revocation of wills or as provided in subsection (a) of this section.