(a) When a mental health power of attorney may be revoked.--A mental health power of attorney may be revoked by the principal at any time, either orally or in writing in whole or in part, unless the principal has been found to be incapable of making mental health treatment decisions or the principal has been involuntarily committed.

(b) Capacity to revoke.--Notwithstanding subsection (a), during a period of involuntary commitment pursuant to Article III of the act of July 9, 1976 (P.L.817, No.143), known as the Mental Health Procedures Act, a principal may revoke the mental health power of attorney only if found to be capable of making mental health decisions after examination by a psychiatrist and one of the following: another psychiatrist, a psychologist, a family physician, an attending physician or a mental health treatment professional. Whenever possible, at least one of the decision makers shall be a treating professional of the declarant or principal.

(c) Effect of revocation.--A revocation shall be effective upon communication to the attending physician or other mental health care provider by the principal or a witness to the revocation of the intent to revoke.

(d) Mental health record.--The attending physician or other mental health care provider shall make the revocation or a finding of capacity part of the mental health record of the declarant.

(e) Reliance on mental health power of attorney.--A physician or other mental health care provider may rely on the effectiveness of a mental health power of attorney unless notified of its revocation.

(f) Subsequent action by agent.--A mental health care agent who has notice of the revocation of a mental health power of attorney may not make or attempt to make mental health care decisions for the principal.