(7)The manager shall provide every overman with a tracing, upto the date of the last survey, showing the workings of the district belowground assigned to him and such tracing shall, where any work of reduction or extraction of pillars is being carried out, show clearly the reference of the permission and the manner in which such reduction or extraction is to be carried out:Provided that in case of opencast mines, such tracing shall also show the sections of the working under his charge.
