Okla. Stat. tit. 63, § 63-2200.19A: Law governing validity and interpretation -

Presumption of validity.

A. A document of gift is valid if executed in accordance with:

1. This act;

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 law

of this state governs 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validly executed or was revoked.