The commissioner may decline to issue a license if an applicant:
(a) Has been refused a license or had a license revoked by any public authority for reasons which indicated lack of honesty or integrity or which showed improper business practice on the part of the applicant.
(b) Has been convicted of a misdemeanor or felony denounced by this code or one of the elements of which involved the misappropriation of money or property.
(c) Has committed an act forbidden by this code.