In coal mining operations where the concentration of respirable dust in the mine atmosphere of any working place contains more than 5 per centum quartz, the Secretary of Health and Human Services shall prescribe an appropriate formula for determining the applicable respirable dust standard under this subchapter for such working place and the Secretary shall apply such formula in carrying out his duties under this subchapter.
Pub. L. 91–173, title II, § 20583 Stat. 765 Pub. L. 96–88, title V, § 509(b)93 Stat. 695 (, , ; , , .)
Statutory Notes and Related Subsidiaries
Change of Name
section 509(b) of Pub. L. 96–88section 3508(b) of Title 20“Secretary of Health and Human Services” substituted in text for “Secretary of Health, Education, and Welfare” pursuant to which is classified to , Education.
Effective Date
Pub. L. 91–173section 509 of Pub. L. 91–173section 801 of this titleSection operative six months after , except to the extent an earlier date is specifically provided for in , see , set out as a note under .