20 Pa.C.S. § 5444: Revocation.

(a) When living will may be revoked.--A living will may be revoked at any time and in any manner by the principal regardless of the mental or physical condition of the principal.

(b) Effect of revocation.--A revocation is effective upon communication to the attending physician or other health care provider by the principal or a witness to the revocation.

(c) Medical record.--The attending physician or other health care provider shall make the revocation part of the medical record of the principal.