HEALTH. 159

to apprentices, so that, however, said journeyman plumbers
and said apprentices shall be authorized to work only under the
direction and control of a duly certified master plumber; and
that said certificate or permits shall be so framed as to show
that said journeyman plumbers and said apprentices are au-
thorized to work only as above provided. Said board may de-
mand and receive from each journeyman plumber the sum of
two dollars at the time of issuing of the first certificate to said
journeyman plumber, and the sum of one dollar for the renewal
thereof each and every year 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 exami-
nation 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 ap-
pointments shall be given to or certain duties shall be per-
formed 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 certifi-
cate authorized to be called a "Master Plumber's Certificate,"
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 misrepresenta-
tion, or has been issued by mistake or inadvertence, 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 Commissioners adopted
in pursuance of the provisions of this sub-title, or contrary