STATISTICS AND INFORMATION. 2779

charges by the Examining Board, previous to the hearing. Such hearing
shall be held at the call of the chairman, within a reasonable time after
charges or complaints have been filed with such Examining Board, but -in
no case longer than thirty days thereafter. Any person whose certificate of
competency has been canceled shall be eligible to take an examination
for a new certificate on and after two years from the date of such cancel-
lation.

1922, ch. 307, sec. 45.

46. Service Certificates shall be granted by the Examining Board
without examination, to mine foremen, assistant mine foreman and fire
bosses who now are acting in such capacities in any mine in this State,
upon filing with such Examining Board proper affidavits in form pre-
scribed by such Examining Board, together with an application for such
service certificate showing experience not less than is required of appli-
cants for the examination therefor, supported by equal and similar evi-
dences of character and general fitness; such application to be made within
six months after October 1, 1922. Such certificate shall be endorsed as
"service certificate"; be similar in form to a certificate of competency
and have like effect for the purposes of this sub-title, while the holder
thereof remains in the employment of the same operator and for a period
not exceeding five years from and after the passage of this Act, A fee of
three dollars shall be paid by the applicant therefor to the State, before
such certificate is issued.

TITLE IV—MAPS AND SURVEY.

CHAPTER VI—Maps Required.

1922, ch. 307, sec. 46.

47. The operator of any coal mine in this State shall make, or cause
to be made by a competent mining engineer or surveyor, an accurate map
of such mine for each seam of coal worked, on a scale of not less than two
hundred feet to the inch, which map shall show as follows:

(a) The boundary lines of the property, the location of all buildings,
railway tracks, wagon or other roads, rivers, streams, lakes and ponds,
with the depth thereof indicated, and other important landmarks on the
surface of such property; with connecting lines of contiguous properties
indicated and especially any lines with relation to contiguous mines or
coal properties.

(b) The openings, excavations, shafts, slopes, drifts, tunnels, planes,
entries, rooms and cross-cuts, and the name and/or location number of
each, if so identified.

(c) The elevation datum at top and bottom of each shaft and slope and
of all drifts, tunnels, planes and at the faces of entries, as found at each
semi-annual survey; and in rooms and entries adjacent to boundary lines
between such mine and any adjoining mine, at points not more than three
hundred feet apart; with the date of entry of each such datum; the loca-