(2)Separate plans and sections for the working of every seam or of every separate section of every seam shall be kept in respect of clause (b),(c)( d) and (e) of sub-regulation (1):Provided that in respect of plans maintained under clause (b) of sub-regulation (1), combined plans of all seams, which are lying within nine metres of each other and which are worked at the mine shall also be kept and in the combined plans, working in different seams or sections shall be shown in different colours.
