Ante, p. 775.
PUBLIC LAW 91-173-DEC. 30, 1969
(2) "working place" means the area of a coal mine inby the last open crosscut, (3) "working section" means all areas of the coal mine from the loading point of the section to and including the working faces, (4) "active workings" means any place in a coal mine where miners are normally required to work or travel; (h) "abandoned areas" means sections, panels, and other areas that are not ventilated and examined in the manner required for working places under section 303 of this title; (i) "permissible" as applied to electric face equipment means all electrically operated equipment taken into or used inby the last open crosscut of an entry or a room of any coal mine the electrical parts of which, including, but not limited to, associated electrical equipment, components, and accessories, are designed, constructed, and installed, in accordance with the specifications of the Secretary, to assure that such equipment will not cause a mine explosion or mine fire, and the other features of which are designed and constructed, in accordance with the specifications of the Secretary, to prevent, to the greatest extent possible, other accidents in the use of such equipment; and the regulations of the Secretary or the Director of the Bureau of Mines in effect on the operative date of this title relating to the requirements for investigation, testing, approval, certification, and acceptance of such equipment as permissible shall continue in effect until modified or superseded by the Secretary, except that the Secretary shall provide procedures, including, where feasible, testing, approval, certification, and acceptance in the field by an authorized representative of the Secretary, to facilitate compliance by an operator with the requirements of section 305(a) of this title withiu the periods prescribed therein; (j) "low voltage" means up to and including 660 volts; "niedium voltage" means voltages from 661 to 1,000 volts; and "high voltage" means more than 1,000 volts; (k) "respirable dust" means only dust particulates 5 microns or less in size; and (1) "coal mine" includes areas of adjoining mines connected underground. TITLE IV—BLACK LUNG B E N E F I T S PART A—GENERAL
SEC. 401. Congress finds and declares that there are a significant number of coal miners living today who are totally disabled due to pneumoconiosis arising out of employment in one or more of the Nation's underground coal mines; that there are a number of survivors of coal miners whose deaths were due to this disease; and that few States provide benefits for death or disability due to this disease 10 coal miners or their surviving dependents. I t is, therefore, the purpose of this title to provide benefits, in cooperation with the States, to coal miners who are totally disabled due to pneumoconiosis and to the surviving dependents of miners whose death was due to such disease; and to ensure that in the future adequate benefits are provided to coal miners and their dependents in the event of their death or total disability due to pneumoconiosis. ^^^ Qg ^ ^ j. p^rposes of this title—