To amend the Federal Coal Mine Health and Safety Act of 1969 to establish a presumption of eligibility for disability benefits in the case of certain coal miners who filed claims under part C of such Act between July 1, 1973, and April 1, 1980.

Amends the Federal Coal Mine Health and Safety Act of 1969 to provide for a presumption of disability due to pneumoconiosis with respect to certain coal miners whose claims were filed during a specified period under the Black Lung Benefits Program.