15. Particulars of every determination of firedamp content made in accordance with this Part of these regulations shall be recorded forthwith in a book provided for that purpose by the owner of the mine.
16.—(1) If any determination of firedamp content made in any length of road (not being a determination made by analysis of a sample of air) shows a firedamp content exceeding one and one quarter per cent. by volume or any indication of inflammable gas is seen on the lowered flame of a safety-lamp in the general body of the air, the person making that determination or the person using the lamp (as the case may be) shall forthwith inform the person in charge of the part of the mine which includes that length of road and that latter person shall after forthwith verifying the accuracy of the information so given to him forthwith discontinue the running of any locomotive in that length of road.
(2) After such discontinuance no locomotive shall be run in that length of road until the manager of the mine, being satisfied that the firedamp content therein does not exceed one and one quarter per cent. by volume, so directs.
(3) If any determination of firedamp content made in any length of road by analysis of a sample of air shows a firedamp content exceeding one and one quarter per cent. by volume, the manager of the mine shall forthwith upon receipt of that information ensure that no locomotive runs in that length of road until he is satisfied that the firedamp content therein does not exceed one and one quarter per cent. by volume.
(4) The manager shall forthwith give to the inspector for the district notice of any discontinuance of the running of a locomotive in pursuance of this regulation.