Mental Health Living Will, Revoking
A mental health living will can be revoked, or cancelled, at any time, unless the declarant has been found incapable of making mental health care decisions or has been involuntarily committed.

An involuntarily committed declarant may be permitted to make a revocation, but only if the attending physician and another medical professional determine that the declarant is capable of making mental health decisions.

Any valid revocation can be expressed to the attending physician or other mental health care provider in writing or verbally. The declarant may also express the revocation to a third party witness, who is permitted to communicate the declarant's revocation to the attending physician or other mental health care provider on behalf of the declarant.  The revocation is effective immediately upon its communication to one of these people, who must also make the revocation a part of the declarant's mental health records.

See: Mental Health Living Will, Generally; Mental Health Living Will, Who May Create; Mental Health Living Will, Duration of Effect; Witnesses, Generally