The administrator of the division of motor vehicles shall appoint any subordinates that he or she may require for the proper performance of his or her duties. He or she shall appoint investigators who shall be empowered to investigate the application for any motor vehicle license or registration in order to ascertain the truth of the statements made in it, to seize or recover the license or registration certificate and number plates of any person whose license or registration shall have been suspended or revoked, and to perform any other duties not inconsistent with the law as the administrator may direct.