The Plumbing Inspector shall investigate the registration and license of every master plumber and shall promptly report to the Examining Board of Plumbers any violation of the provisions of law relating to the loaning, renting, selling or transferring of certificates or license plates, and the Plumbing Inspector shall immediately apply to the Examining Board of Plumbers for the forfeiture of the license and certificate of registration of any master plumber who shall have loaned, rented, sold or transferred such certificate, plate or sign in violation of law, and the Plumbing Inspector shall summon and have prosecuted such offender for a misdemeanor as provided by law.