(a) An attorney-in-fact may resign by any of the following means:
(1) If the principal is competent, by giving notice to the principal.
(2) If a conservator has been appointed, by giving notice to the conservator.
(3) On written agreement of a successor who is designated in the power of attorney or pursuant to the terms of the power of attorney to serve as attorney-in-fact.
(4) Pursuant to a court order.
(b) This section is not subject to limitation in the power of attorney.