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50-73-201. Operator to make map of coal mine.
50-73-202. Map of the surface.
50-73-203. Map of underground working.
50-73-204. Map for every seam.
50-73-205. Copies of maps for department.
50-73-206. Maps to be updated on basis of semiannual surveys.
50-73-207. Annual surveys in mines having only five men on shift.
50-73-208. Final survey and map update when mine abandoned or worked out.
50-73-209. Procedure when operator fails to furnish or update map.
50-73-210. Restrictions as to boundary lines.