(4) "Document of gift" means a donor card, a statement attached to or imprinted on a motor vehicle operator's or chauffeur's license, a will, or other writing used to make an anatomical gift.

"document of gift" means a document other than a will. Unless the gift is deemed medically unsuitable, the gift becomes effective and irrevocable upon the death of the donor and does not require the consent or concurrence of any other person after the donor's death. [...]