336                              Laws of Maryland                        [Ch. 88

least once in each year the examination shall be held in Baltimore
City, they shall examine each and every person who shall desire to
work at the plumbing business, touching his competency and qualifi-
cation [: ]; and upon being- satisfied that the person so examined is
competent and qualified to work at said business, they, or any four of
them, shall grant to such a person a certificate of competency and
register him in their books as a practical plumber, which shall operate
as full authority to him to work at, conduct and engage in the said
plumbing business for the period for which such certificate shall be
granted, and such certificate may be called or designated by said
Board a "master plumber's certificate." The exercise or performance
of all powers, authority, duties and functions vested in the Board by
the provisions of this subtitle, shall be subject to the power and
authority of the Secretary of Licensing and Regulation as set forth in
Article 41 of this Code, or elsewhere in the laws of this State.

387C.

(c) Regulations; appeal from disapproval of county plan; studies,
surveys, etc; cost of county plans; location of sewerage treatment
facility discharge point.—1. The State Department of Health shall
adopt and from time to time, amend regulations which

(i) Provide for control, limitation or prohibition of installing or
using individual or community water supply or sewerage systems;

(ii) Require the governing body of each county to submit reports
of progress in the development of county plans.

(iii) Stipulate such other matters as may be necessary and appro-
priate to the administration of this subsection;

(iv) Require consideration of the present and future density of
population, size of the lots, contour of the land, porosity and
absorbency of the soil, ground water conditions and variations therein
from time to time and place to place, including availability of water
from unpolluted aquifers or portions thereof, type of construction
of community water supply and sewerage systems, size of the
proposed development, and other pertinent factors;

(v) Require the installation of community water supply, sewerage
or solid waste disposal systems and the connection of all premises
thereto or the service of all premises thereby if such systems are
reasonably necessary giving due consideration to such factors as are
set forth in paragraph 1 (iv) of this subsection. Such systems shall
be designed so as to permit connection to a larger system at such
time as the larger system becomes available;

(vi) Permit individual water supply or sewerage systems in areas
where community water supply or sewerage systems are neither
available nor required to be installed under paragraph 1 (v) provided
that:

(A)   Such individual water supply or sewerage systems are ad-
judged by the Department to be adequate and safe for use during
the period before a community water supply or sewerage system is
scheduled to become available;

(B)  Adequate provisions are made prior to or at the time of
the installation of such individual systems to permit the discontin-
uance of their use and the connection of the premises served thereby