(A) Whenever a principal designates another his attorney in fact by a power of attorney in writing and the writing contains (1) the words "This power of attorney is not affected by physical disability or mental incompetence of the principal which renders the principal incapable of managing his own estate", (2) the words "This power of attorney becomes effective upon the physical disability or mental incompetence of the principal", or (3) similar words showing the intent of the principal that the authority conferred is exercisable notwithstanding his physical disability or mental incompetence or either physical disability or mental incompetence, the authority of the attorney in fact is exercisable by him as provided in the power on behalf of the principal notwithstanding later physical disability or mental incompetence of the principal or later uncertainty as to whether the principal is dead or alive. The power may define "physical disability" or "mental incompetence" and may set forth the procedures for determining whether the principal is physically disabled or mentally incompetent. If no definition of mental incompetence or procedures for determining mental incompetence are set forth, and the authority of the attorney in fact relates solely to health care, mental incompetence is to be determined according to the standards and procedures for inability to consent under Section 44-66-20(6) of the Adult Health Care Consent Act. The authority of the attorney in fact to act on behalf of the principal must be set forth in the power and may relate to any act, power, duty, right, or obligation which the principal has or may acquire relating to the principal or any matter, transaction, or property, including the power to consent or withhold consent on behalf of the principal to health care. The attorney in fact has a fiduciary relationship with the principal and is accountable and responsible as a fiduciary. All acts done by the attorney in fact pursuant to the power during a period of physical disability or mental incompetence or uncertainty as to whether the principal is dead or alive have the same effect and inure to the benefit of and bind the principal or his heirs, devisees, legatees, and personal representative as if the principal were alive, mentally competent, and not disabled physically.
(B) An instrument to which this section is applicable also may provide for successor attorneys in fact and provide conditions for their succession, which may include an authorization for the court to appoint a successor, and the succession may occur whether or not the principal then is physically disabled or mentally incompetent. The appointment of an attorney in fact under this section does not prevent a person or his representative from applying to the court and having a guardian or conservator appointed. Unless the power of attorney provides otherwise, appointment of a guardian terminates all or part of the power of attorney that relates to matters within the scope of the guardianship, and appointment of a conservator terminates all or part of the power of attorney that relates to matters within the scope of the conservatorship.
(C) A power of attorney executed under the provisions of this section must be executed and attested with the same formality and with the same requirements as to witnesses as a will. In addition, the instrument must be recorded in the same manner as a deed in the county where the principal resides at the time the instrument is recorded. After the instrument has been recorded, whether recorded before or after the onset of the principal's physical disability or mental incompetence, it is effective notwithstanding the mental incompetence or physical disability. If the authority of the attorney in fact relates solely to the person of the principal, the instrument is effective without being recorded.
(D) A power of attorney as provided for under this section is valid if:
(1) executed in compliance with this section; or
(2) its execution complies with the law at the time of execution of the jurisdiction where the instrument was executed and it is recorded as required by subsection (C). Notwithstanding the provisions of Section 30-5-30, a valid power of attorney as provided for under this section which is executed in another jurisdiction may be recorded as though it complies with the provisions of subsection (C) of this section.
(E) A properly executed durable power of attorney that authorizes an attorney in fact to make health care decisions or other decisions regarding the principal is valid whether or not it was executed after May 14, 1990.