law: 9. Power of Central Government to exempt.-
  Notwithstanding anything contained in this Act, if the Central Government is satisfied that there is in force in any State or part thereof a law making adequate provision for the financing of activities to promote the welfare of persons employed in the limestone or dolomite mines, it may, by notification in the Official Gazette, direct that all or any of the provisions of this Act shall not apply or shall apply to such State or part thereof subject to such exceptions and modifications as may be specified in the notification.