7. An applicant seeking certification to engage in the fire protection equipment business shall:
a. Be at least 18 years of age;
b. Be of good moral character, and not have been convicted of a crime of the first, second or third degree within 10 years prior to the filing of the application;
c. Meet qualifications established by the commissioner, regarding experience, continuing education, financial responsibility and integrity; and
d. Establish his qualifications to perform and supervise various phases of fire protection equipment installation, service, repair, inspection and maintenance as evidenced by successful completion of an examination approved by the commissioner.