HEALTH 1891

thereafter, on or before the first day of May; and said board, at any time,
may require, on any application for renewal, any applicant to pass another
examination before issuing any renewal, or may issue any renewal without
requiring any other examination, as said board in each case, from year to
year, may deem proper; but no charge shall be made for the issuing of
permits or renewals of permits to apprentices. Said commissioners may fix
the requirements of the competency and qualification of applicants, whether
of master plumbers or of journeyman plumbers, as different standards, in
their judgment, for different parts of the State, and may accordingly limit
the certificates so as to permit the holder thereof to do plumbing work
only in certain specified sections of the State, as said commissioners may
determine. Whenever by any of the general or local laws of this State it
is or shall be provided that a permit shall be granted to anyone qualified to
work at the plumbing business or to do plumbing work, however the same
may be designated, or that certain appointments shall be given to or certain
duties shall be performed by one qualified to do plumbing work, or any
other reference is made to one qualified to do work which shall be included
under the term "plumbing work," however the same shall be designated,
then such general or local laws shall be held to refer only to one qualified
to work at the plumbing business under his own direction; that is, one
holding a certificate authorized to be called a "master plumber's certifi-
cate," and shall not be held to refer to a journeyman plumber or to an
apprentice. Said commissioners may revoke any certificate or permit which,
after notice to the holder and hearing they may determine has been obtained
by fraud or misrepresentation, or has been issued by mistake or inadver-
tence, and said commissioners may revoke or suspend for such time as they
may deem proper the operation of any certificate or permit when the said
commissioners, after notice to the holder and a hearing, shall determine
that the holder thereof has used such certificate or permit contrary to the
provisions of this sub-title, or to any rules or regulations of said commis-
sioners adopted in pursuance of the provisions of this sub-title, or contrary
to the limitations contained in said certificates or permit, or has violated
any of the provisions of this sub-title. Nothing in this sub-title shall be
construed to prevent incorporated gas companies from making connections
of gas appliances for domestic purposes.

1929, ch. 362.

325. The provisions of this sub-title shall not apply to Montgomery
and Prince George's Counties except as hereinafter provided. In Mont-
gomery and Prince George's Counties, the Washington Suburban Sanitary
Commission shall have the sole power to grant certificates to persons desir-
ing to work at the plumbing business in said counties, provided that the
fees to be charged for said certificates shall not exceed the fees as fixed in
this sub-title. The said Commission shall have the power to make such
rules and regulations as to the installation of plumbing in said counties as
it may deem necessary for the public health, and shall have and exercise
within the said Montgomery and Prince George's Counties all the au-
thority and power conferred upon the State Board of Commissioners of
Practical Plumbing by this sub-title. Provided, however, that nothing in
this section shall affect the certificates heretofore issued by the Commis-
sioners of Practical Plumbing, but all persons who have such certificates
shall have and exercise all the rights and privileges which a holder of such