Okla. Stat. tit. 63, § 63-3101.14

Execution of an advance directive by an individual, which

provides for the provision, withholding, or withdrawal of life-

sustaining treatment for that individual or for the appointment of

another to give directions to provide, withhold, or withdraw life-

sustaining treatment, executed in another state in compliance with

the law of that state or of this state is valid for purposes of the

Oklahoma Advance Directive Act to the extent the advance directive

does not exceed authorizations allowed under the laws of this state;

provided, that no such advance directive shall be deemed to

authorize the withholding or withdrawal of artificially administered

nutrition and/or hydration unless it specifically authorizes such

withholding or withdrawal of artificially administered nutrition

and/or hydration, and either the advance directive:

1. Was executed by a person who was not a resident of Oklahoma

at the time of execution; or

2. Specifically authorizes the withholding or withdrawal of

artificially administered nutrition and/or hydration in the

declarant’s own words or by a separate section, separate paragraph,

or other separate subdivision that deals only with nutrition and/or

hydration and which section, paragraph, or other subdivision is

separately initialed, separately signed, or otherwise separately

marked by the person executing the advance directive.