NOTICE: This Black Lung Deskbook was created solely to assist the staff of the Benefits Review Board in researching cases arising under the Federal Coal Mine Health and Safety Act of 1969, as amended. This Desk Book in no way constitutes the official opinion of the Board or any of its members on any subject. The Desk Book does not necessarily contain an exhaustive or a current treatment of Board holdings, and should, under no circumstances, substitute for a party's own research into the statutory, regulatory, and case law authorities on any subject referred to therein. It is intended simply as a research tool; and is not intended as final legal authority and should not be cited or relied upon as such. See Notice, 47 Fed. Reg. 57,584 (1982).