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Paragraph 12

Original text. Later amendments are not shown.

(1)

The places for and the number of detectors to be in use thereat, being places in a part of the mine in which the use of lamps or lights, other than permitted lights, is unlawful, are as follows—

(a)

at each longwall face, one detector for each eight persons, and one detector for any person or persons not thus taken into account, in the total number of persons wholly or mainly employed at that face during the shift;

(b)

at each other working face (including a cross measure drift or heading in stone), one detector;

(c)

at each place in an airway which as regards any working face is a return airway being a place at which one or more men are engaged in repair work, one detector;

(d)

at each place at which apparatus comprising an electric motor is in operation at or within three hundred feet of a working face, one detector.

(2)

Any detector required by sub-paragraph (d) of the last preceding paragraph shall be in addition to any detector required by any other sub-paragraph thereof.