Places for determinations
13.—(1) Determinations of the firedamp content shall be made—
(a)at a point at each end of every length of road in which any locomotive runs;
(b)at such other suitable points as may be fixed by the manager:
(2) An inspector may, if he is of opinion that any point fixed in pursuance of sub-paragraph (b) of paragraph (1) of this regulation is unsuitable, serve on the manager a notice requiring him to fix some other point in substitution therefor and may serve on the manager a notice requiring determinations to be made at any other point specified in the notice in addition to those required by the preceding paragraph.