Okla. Stat. tit. 43A, § 43A-11-112: Immunity from civil or criminal liability

A. In the absence of knowledge of the revocation of an advance

directive for mental health treatment, a person is not subject to

civil or criminal liability or discipline for unprofessional conduct

for carrying out the advance directive for mental health treatment

pursuant to the requirements of the Advance Directives for Mental

Health Treatment Act.

B. A physician or psychologist whose actions under the Advance

Directives for Mental Health Treatment Act are in accord with

reasonable medical standards or standards of mental health

treatment, is not subject to criminal or civil liability or

discipline for unprofessional conduct with respect to those actions.

C. An individual designated as an attorney-in-fact pursuant to

the provisions of this act, to make mental health treatment

decisions for a declarant and whose decisions regarding the

declarant are made in good faith pursuant to the Advance Directives

for Mental Health Treatment Act, is not subject to criminal or civil

liability, or discipline for unprofessional conduct with respect to

those decisions.