Indiana Code Title 30. Trusts and Fiduciaries § 30-5-8-3

(1) the principal was competent at the time the power of attorney was executed;

(2) the attorney in fact does not have actual knowledge of the termination of the power of attorney;

(3) in the case of a successor attorney in fact, the original attorney in fact has failed or ceased to serve, and the successor attorney in fact is empowered to act on behalf of the principal;  and

(4) if the effective date of the power of attorney begins upon the occurrence of a certain event, the event has occurred and the attorney in fact is able to act under the power of attorney.