(a) The subsequent disability or incompetence of a principal does not revoke or terminate the authority of an attorney-in-fact who acts under a power of attorney in a writing executed by a principal if the writing contains the words "This power of attorney shall become effective upon the disability of the principal," or contains the words "This power of attorney shall not be affected by the subsequent disability of the principal," or words substantially similar showing the intent of the principal that the authority conferred shall be exercisable notwithstanding the principal's subsequent disability, incompetence, or uncertainty as to whether the principal is dead or alive.
(b) An act done by an attorney-in-fact under a power granted in a power of attorney under AS 13.26.332 - 13.26.344 during a period of disability, incompetence, or uncertainty as to whether the principal is dead or alive has the same effect and enures to the benefit of and binds a principal and the principal's distributees, devisees, legatees, and personal representatives as if the principal were competent and not disabled. If a conservator is later appointed for the principal, during the continuance of the appointment the attorney-in-fact shall account to the conservator rather than to the principal. The conservator has the same power the principal would have if the principal were not disabled or incompetent to revoke, suspend, or terminate the power of attorney.