2120 LAWS OF MARYLAND. [CH. 891

29. In the event that a person holding a valid certificate
of qualification desires to practice in a location other than
that designated in the permit required to be issued by
Section 28 (c) of this sub-title, he shall return such permit
then held to the secretary of the Board, and the Board
shall issue a new permit valid for the new employment
location.

30. (a) No person, other than a duly licensed dentist
shall practice dental hygiene except upon compliance with
the provisions of this sub-title.

(b) Any person licensed to practice dental hygiene
under the provisions of this sub-title may practice only
in the private offices of a licensed dentist; in a private
office or a dental clinic provided by a Federal, State, county,
or municipal agency, or in hospitals, schools, or charitable
institutions, or in an industrial clinic supervised by a
licensed dentist, conducted only for employees of the firm
providing the clinic; and provided further, that no dentist
shall employ more than one dental hygienist in the con-
ducting of a private practice.

(c) Any person licensed to practice dental hygiene
under the provisions of this sub-title may remove cal-
careous deposits, accretions, and stains from exposed sur-
faces of the teeth and may polish the teeth and chart
cavities noted during the process of prophylaxis, but shall
not perform any other operations on the teeth or tissues
of the mouth.

31. The Board shall have the power to suspend or
revoke or refuse to renew a certificate of qualification
upon anyone or more of the following grounds:

(a) Gross immorality, or unprofessional conduct.

(b) Failure, neglect, or refusal to renew the certifi-
cate of qualification annually.

(c) Non-observance or infraction of any provision of
this sub-title, or of any Board rule or regulation made
hereunder.

(d) Gross inefficiency in the practice of dental hygiene.

32. If any person shall violate or permit the violation
of any provision of this sub-title, he shall be guilty of a
misdemeanor and upon conviction thereof be fined not
more than One Thousand Dollars ($1,000).