Okla. Stat. tit. 43A, § 43A-11-109

A. An advance directive for mental health treatment may be

revoked in whole or in part by the declarant at any time while the

declarant is capable by any of the following methods:

1. By being destroyed by the declarant or by some person in the

declarant's presence and at the declarant's direction;

2. By a written revocation signed and dated by the declarant

expressing the declarant's intent to revoke;

3. By a declarant's unambiguous verbal expression, in the

presence of two witnesses eighteen (18) years of age or older, of an

intent to revoke the declaration; or

4. By a declarant's unambiguous verbal expression to an

attending physician or psychologist.

B. The revocation shall become effective upon communication to

the attending physician or psychologist by the declarant or by both

witnesses. The attending physician or psychologist shall record the

time, date, and place when the notification of the revocation was

received.

C. In the absence of actual notice of the revocation of an

advance directive for mental health treatment, no attending

physician or psychologist, health care facility or other person

acting under the direction of an attending physician or psychologist

shall be subject to criminal prosecution or civil liability or be

deemed to have engaged in unprofessional conduct as a result of the

provision of medical treatment to a declarant in accordance with the

Advance Directives for Mental Health Treatment Act unless the

Oklahoma Statutes - Title 43A. Mental Health Page 243

absence of actual notice resulted from the negligence of the health

care provider, physician, or other person.