(1) violated any provision of, or any obligation imposed by this
chapter or has violated any law in the course of any activities for
which such certificate is required;
(2) made a material misstatement in the application for such
certificate;
(3) been guilty of fraudulent or dishonest practices; or
(4) demonstrated his incompetency or untrustworthiness.
(b) Before revoking or suspending any such certificate, the
superintendent shall give to the person and the employer of the person
named in such certificate notice of hearing as specified in this
chapter.