Okla. Stat. tit. 63, § 63-3101.10: Civil and criminal liability and disciplinary actions

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

directive, a person is not subject to civil or criminal liability or

discipline for unprofessional conduct for carrying out the advance

directive pursuant to the requirements of the Oklahoma Advance

Directive Act.

B. A physician or other health care provider, whose actions

under the Oklahoma Advance Directive Act are in accord with

reasonable medical standards, is not subject to criminal or civil

liability or discipline for unprofessional conduct with respect to

those actions; provided, that this subsection may not be construed

to authorize a violation of Section 3101.9 of this title. In making

decisions and determinations pursuant to the Oklahoma Advance

Directive Act the physician shall use his or her best judgment

applying with ordinary care and diligence the knowledge and skill

that is possessed and used by members of the physician’s profession

in good standing engaged in the same field of practice at that time,

measured by national standards.

C. An individual designated as a health care proxy, pursuant to

Section 3101.4 of this title, to make health care decisions for a

declarant and whose decisions regarding the declarant are made in

good faith pursuant to the Oklahoma Advance Directive Act, is not

subject to criminal or civil liability, or discipline for

unprofessional conduct with respect to those decisions.