(1) Has violated any provision of this chapter or of any other law of this state or any regulation duly promulgated by the Commissioner;
(2) Has intentionally misrepresented or concealed any material fact in the application for the license or any document filed in support thereof;
(3) Has permitted any person in his or her employ, either by direct instruction or by reasonable implication, to violate this chapter;
(4) Has been convicted of a felony by final judgment in any state or federal court;
(5) Has failed to comply with or has violated any proper order, rule, or regulation issued by the Commissioner; or
(6) Has otherwise shown a lack of trustworthiness or lack of competence to act as a blaster.