Signing Requirements
At least two witnesses 18 or older must sign an advance directive.[1]
The witnesses cannot be beneficiaries of the principal’s estate or assets.
Revocation
A principal in any state can revoke an advance directive using any method and notifying their health care provider.[2] An agent’s authority can be revoked by written statement or any means that informs the healthcare provider of the revocation.[3]
Decrees of annulment, dissolution of marriage, and legal separation will also revoke a spouse’s authority as an agent.
Registering
Oklahoma law does not require advance directives to be registered. An optional registration system is provided on the State Department of Health website.[4]