Sec. 22. The commissioner, or his designated representative, may:
(1) conduct under IC 4-21.5-3 hearings necessary to carry out this chapter;
(2) hear evidence;
(3) conduct investigations to determine whether any person has violated or is about to violate this chapter or a rule or order issued under this chapter; and
(4) compel the production of any item relevant to an investigation under this chapter.