The following categories of dental offices are exempt from the requirement to install an amalgam separator; provided, that they do not place or remove amalgam:

(a)  Orthodontists;

(b)  Periodontists;

(c)  Endodontists;

(d)  Oral and maxillofacial surgeons; and

(e)  A dental office that is scheduled to no longer be used as a dental office after January 1, 2008.