(a) The subsequent incapacity of a principal does not revoke or terminate the authority of an agent 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 incapacity of the principal,” or contains the words “This power of attorney shall not be affected by the subsequent incapacity 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 incapacity or uncertainty as to whether the principal is dead or alive.
(b) An act done by an agent under a power granted in a power of attorney under AS 13.26.645 - 13.26.665 during a period of incapacity 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 there were no incapacity of the principal . If a conservator is later appointed for the principal, during the continuance of the appointment , the agent is accountable to the conservator as well as to the principal. The conservator has the same power to revoke, suspend, or terminate the power of attorney that the principal would have if there was no incapacity of the principal .