7.
The Chief Inspector may not allow a person unless he holds "A" certificate to act as a Manager of any underground coal mine when the average monthly output is in excess of 2500 t. What is A given by

9.
Notice of intention (or) proposal of exploration for methane presence in any coal seam or abonded coal mines, with an objective to explore the methane, domestic or industrial purpose, manager of mine shall not less than . . . . . . . . months prior to the date of start of such exploration work, give notice in writing in form and method specific by CI for the purpose to the CI and also RI

10.
Dust plan shall be maintained in every mine having working below ground plan on a scale having representative factors of not less than . . . . . . . . clearly, showing by distinctive colours, code letters and numbers.

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