83 STAT. ]
PUBLIC LAW 91-173-DEC. 30, 1969
month period following the date of enactment of this Act, over a number of continuous production shifts to be determined by the Secretary and the Secretary of Health, Education, and Welfare, and (2) as measured thereafter, over a single shift only, unless the Secretary and the Secretary of Health, Education, and Welfare find, in accordance with the provisions of section 101 of this Act, that such single shift meas- ^"'®' P* ^'*^' urement will not, after applying valid statistical techniques to such measurement, accurately represent such atmospheric conditions during such shift. (g) The Secretary shall cause to be made such frequent spot inspec- jj^^°* inspections as he deems appropriate of the active workings of coal mines for the purpose of obtaining compliance with the provisions of this title. (h) Respiratory equipment approved by the Secretary and the Secretary of Health, Education, and Welfare shall be made available to all persons whenever exposed to concentrations of respirable dust in excess of the levels required to be maintained under this Act. Use of respirators shall not be substituted for environmental control measures in the active workings. Each operator shall maintain a supply of respiratory equipment adequate to deal with occurrences of concentrations of respirable dust in the mine atmosphere in excess of the levels required to be maintained under this Act. MEDICAL
EXAMINATIONS
SEC. 203 (a) The operator of a coal mine shall cooperate with the Secretary of Health, Education, and Welfare in making available to each miner working in a coal mine the opportunity to have a chest roentgenogram within eighteen months after the date of enactment of this Act, a second chest roentgenogram within three years thereafter, and subsequent chest roentgenograms at such intervals thereafter of not to exceed five years as the Secretary of Health, Education, and Welfare prescribes. Each worker who begins work in a coal mine for the first time shall be given, as soon as possible after commencement of his employment, and again three years later if he is still engaged in coal mining, a chest roentgenogram; and in the event the second such chest roentgenogram shows evidence of the development of pneumoconiosis the worker shall be given, two years later if he is still engaged in coal mining, an additional chest roentgenogram. All chest roentgenograms shall be given in accordance with specifications prescribed by the Secretary of Health, Education, and Welfare and shall be supplemented by such other tests as the Secretary of Health, Education, and Welfare deems necessary. The films shall be read and classified in a manner to be prescribed by the Secretary of Health, Education, and Welfare, and the results of each reading on each such person and of such tests shall be submitted to the Secretary and to the Secretary of Health, Education, and Welfare, and, at the request of the miner, to his physician. The Secretary shall also submit such results to such miner and advise him of his rights under this Act related thereto. Such specifications, readings, classifications, and tests shall, to the greatest degree possible, be uniform for all coal mines and miners in such mines. (b)(1) On and after the operative date of this title, any miner who, in the judgment of the Secretary of Health, Education, and Welfare based upon such reading or other medical examinations, shows
763
�
