374.310.  Refusal to grant or renew insurance license, when. — The director of the department of commerce and insurance shall not grant or renew any life or health insurance license if the license has been or is being used by the applicant or licensee for any purpose prohibited by sections 374.300 to 374.310.  Before the director can deny renewal he shall be required to hold a public hearing, with ten days' notice to the applicant, to determine whether the license has been or is being used contrary to the mandates of sections 374.300 to 374.310.  Appeal from the decision of the director shall be to the administrative hearing commission which shall conduct a hearing de novo.