(d) All persons heretofore appointed to serve as a committee or as a guardian retain their authority, powers and duties in that capacity, except to the extent that their authority, powers and duties as guardian or conservator under the provisions of this chapter are more specifically enumerated, in which event the committee or guardian has the authority, powers and duties so enumerated. Wherever in the Constitution, the Code of West Virginia, Acts of the Legislature or elsewhere in law a reference is made to a committee for an incompetent person, such reference shall be read, construed and understood to mean guardian and/or conservator as defined in this chapter.