The commissioner may deny or refuse to renew a license if any applicant, partner, officer or director identified in the application for a license:
a. Previously held a license issued under this subchapter which was revoked or suspended without the terms of the suspension being fulfilled;
b. Has committed an act which, if committed by a licensee, would be grounds for suspension or revocation of a license issued pursuant to this subchapter;
c. Has acted in the capacity of a licensee under this subchapter without a license therefor;
d. Has been convicted of a crime or offense which relates to the operation of a business dealing in the sale, rental, repair or servicing of products for the disabled.