Regulation 5

After regulation 7 of the principal regulations there shall be added the following regulation:—

“7A

On every occasion on which a determination of firedamp content is required to be made at or as near as is practicable to the point in an airway serving a longwall face thirty feet from the nearest working place at that face, being an airway which as regards that face is a return airway, a determination of firedamp content shall also be made as near as is practicable to the point in that airway thirty feet from the junction thereof with any other return airway.”