(a) The board by rule may delegate any power relating to a contested case hearing, other than the power to issue a final order, to:
(1) one or more of the board's members;
(2) the executive director;
(3) the director of a division of the department; or
(4) one or more of the department's employees.
(b) The board by rule may delegate the authority to issue a final order in a contested case hearing to:
(1) one or more of the board's members;
(2) the executive director; or
(3) the director of a division within the department designated by the board or the executive director to carry out the requirements of this chapter.
(c) The board by rule may delegate any power relating to a complaint investigation to any person employed by the department.