For the purpose of this Division, knowledge that a non-enduring power of attorney is invalid or has been revoked includes the following—
(a) knowledge of the happening of an event that invalidates or revokes the non-enduring power of attorney or a power under the non‑enduring power of attorney;
(b) having reason to believe that the non‑enduring power of attorney, or a power under the non-enduring power of attorney, is invalid or has been revoked.