HRS §327-19
When a gift of body parts is valid and which state's rules apply
This section says a document that gives your body parts after death is valid if it follows Hawaii's rules, the rules where it was signed, or the rules of your home or home country. If valid, Hawaii's rules explain it. People can assume it is valid unless they know it was not signed correctly or was canceled.
everyone
The statute, as written — Law governing validity; choice of law as to execution of document of gift; presumption of validity
(a) A document of gift shall be valid if executed in accordance with: (1) This part; (2) The laws of the state or country where it was executed; or (3) The laws of the state or country where the person making the anatomical gift was domiciled, has a place of residence, or was a national at the time the document of gift was executed. (b) If a document of gift is valid under this section, the laws of this State govern the interpretation of the document of gift. (c) A person may presume that a document of gift or amendment of an anatomical gift is valid unless that person knows that it was not validly executed or was revoked.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.