Ohio Revised Code Title XXI. Courts Probate Juvenile § 2135.09

(A) A declarant may revoke a declaration at any time the declarant has the capacity to consent to mental health treatment decisions. Any revocation of a declaration by a declarant shall be in writing, signed by the declarant, and dated. The revocation shall be effective upon its communication to the mental health treatment provider of the declarant or the health care facility providing services to the declarant. If the declaration is operative, then the declarant may revoke the declaration after a designated physician or a psychiatrist, and one other mental health treatment provider, who examine the declarant determine that the declarant has the capacity to consent to mental health treatment decisions.

(B) Upon the declarant's revocation of a declaration, the mental health treatment provider or the health care facility shall make the revocation a part of the declarant's medical record.

(C) A valid declaration for mental health treatment revokes a prior, valid declaration for mental health treatment.

(D) The probate judge of the county in which the declarant is located may revoke a declaration if the judge appoints a guardian for the declarant and specifically orders the revocation of the declaration.