616 LAWS OF MARYLAND.

(427). The said board shall have general supervision of all
stationary engineers within the State of Maryland, except as
hereinafter provided; it shall be their duty to examine all
engineers of the age of twenty-one years or upwards, who shall
apply to them for examination, and to give all parties so
examined a certificate of proficiency if found proficient, and
to refuse to give such certificate if not found proficient, and
the parties so receiving such certificate shall pay to the said
board the sum of three dollars ($3) for each certificate so
issued and from all renewals of all grades the sum of one dollar
and fifty cents ($ 1.50); said certificate shall be of four grades;
a certificate of the first grade will permit the holder thereof to
take charge of any plant of machinery; the second grade to
take charge of any plant of machinery from one to five hun-
dred horse-power, and the third grade to take charge of any
plant of machinery from one to thirty horse-power, and the
fourth grade to take charge of any hoisting or portable plant
of machinery; and the said certificate shall run for the term
of one year, and shall be renewed annually, the term of begin-
ning of said certificate to be from the date of the examination
of the respective applicant; provided, that no engineer having
such certificate shall have charge of more than one plant of
machinery at the same time unless said plant be of the same
company and at one and the same place; and no substitute
who has not been examined and received a certificate, afore-
said, shall be placed in charge of machinery by any engineer
who has.

SEC. 2. And be it further enacted, That this Act shall take
effect from the date of its passage.

Approved April 8, 1910.

CHAPTER 630.

AN ACT to empower the Mayor and City Council of Baltimore
to issue the stock of said corporation to an amount not
exceeding ten million dollars, for the purpose of providing
additional money for the projection, construction, establish-
ment and completion of the sewerage system, authorized by
Chapter 349 of the Acts of the General Assembly of Mary-
land, enacted during the Session of the year 1904, including
in said system the disposal of sewage and drainage from
property belonging to or under the control of the Mayor and
City Council of Baltimore, said money to be expended for
the purposes authorized by said Act and of this Act, and
subject to the terms, conditions and provisions of said Acts,
and to regulate the location of sewers and provide for the