§ 6610. Exempt persons. Nothing in this article shall be construed to affect or prevent:

1. An unlicensed person from performing solely mechanical work upon inert matter in a dental office or on a dental laboratory prescription of a dentist holding a license or limited permit;

2. A student from engaging in clinical practice as part of a registered program operated by a school of dentistry under supervision of a dentist holding a license or limited permit for instructing in dentistry in a school of dentistry:

3. A student from engaging in any procedure authorized under section sixty-six hundred six of this article in clinical practice as part of a registered program in dental hygiene under supervision of a dentist holding a license or a limited permit for instructing in dentistry in a school of dental hygiene;

4. An employee of a federal agency from using the title of and practicing as a dentist or dental hygienist insofar as such activities are required by his salaried position;

5. A dentist or a dental hygienist licensed in some other state or country from making a teaching clinical demonstration before a regularly organized dental or medical society or group, or from meeting licensed dentists in this state for consultation, provided such activities are limited to such demonstration or consultation.

6. A dentist licensed in another state or country who is employed on a full-time basis by a registered dental school as a faculty member with the rank of assistant professor or higher from conducting research and clinical demonstrations as a part of such employment, under the supervision of a licensed dentist and on the premises of the school. No fee may be charged for the practice of dentistry authorized by this subdivision.

7. A dentist licensed in another state or country who is visiting an approved dental school or any other entity operating a residency program that has been accredited by a national accrediting body approved by the department to receive dental instruction for a period not to exceed ninety days from engaging in clinical practice, provided such practice is limited to such instruction and is under the direct supervision of a licensed dentist.

8. Any student matriculated in an accredited dental school located outside New York state from engaging in appropriately supervised clinical practice as part of the school's dental program in a teaching hospital which has a teaching affiliation agreement with the student's dental school.