(a) An advance directive properly executed prior to October 1, 2006, shall have the same legal force and effect as if it had been executed in accordance with the provisions of this chapter.
(b) An appointment of health care agent properly executed prior to October 1, 2006, shall have the same legal force and effect as if it had been executed in accordance with the provisions of this chapter in effect at the time of its execution.
(c) A power of attorney for health care decisions properly executed prior to October 1, 2006, shall have the same power and effect as provided under section 1-54a of the general statutes, revision of 1958, revised to January 1, 2005, in effect at the time of its execution.