A dental laboratory may make dental appliances for research, technique samples, or training purposes: Without a work authorization if the dental laboratory annually secures permission from the Board to use plastic typdont or dentoform type models for this fabrication; or Under a work authorization signed by a licensed dentist that gives the dental laboratory permission to use the dentist’s cast of a particular patient and that contains: The name and address of the dental laboratory; Patient identification by name or number; The date on which the written work authorization form was completed; and The name and license number of the dentist who signs the form.