(a) It is unlawful for any person, other than a dentist or other dental practitioner, to sell, offer for sale or furnish any dental prosthesis or other dental laboratory service to any person who is not a dentist or other dental practitioner.

(b) It is unlawful for any person to perform dental laboratory services without a work authorization: Provided, That this subsection does not apply to a dentist or other dental practitioner, or to their employees working under their direct supervision, performing dental laboratory services as a part of their own dental practice and for their own dental patients.

(c) It is unlawful for any dental laboratory to perform any dental laboratory service without the issuance of a work authorization by a dentist or other dental practitioner.

(d) It is unlawful for any dental laboratory or dentist who fabricates a full upper or full lower set of prosthetic dentures not to affix upon the dentures, in a nonremovable manner, the name of the patient, the initials of the dentist's state of practice and license identification.

(e) It is unlawful for any dental laboratory either directly or indirectly:

(1) To advertise that it is engaged in the business of performing dental laboratory services;

(2) To advertise it performs dental laboratory services for members of the public;

(3) To advertise a price for the performance of dental laboratory services; or

(4) To advertise techniques used or materials employed by it in the performance of dental laboratory services: Provided, That this subsection does not prevent dental laboratories from advertising in dental journals or in other professional dental publications or from communicating directly to a dentist and other dental practitioner or from listing the dental laboratory in business and telephone directories if the business and telephone directory announcements are limited to name, address and telephone number and do not occupy more than the number of lines necessary to disclose the information, or from displaying the trade name and address of the dental laboratory on the door of its place of business or on name plates or door plates exhibited on the interior or exterior of the place of business.