30 U.S. Code § 845 - Dust standards in presence of quartz

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, § 205,Dec. 30, 1969, 83 Stat. 765; Pub. L. 96–88, title V, § 509(b),Oct. 17, 1979, 93 Stat. 695.)
Change of Name

“Secretary of Health and Human Services” substituted in text for “Secretary of Health, Education, and Welfare” pursuant to section 509(b) ofPub. L. 96–88which is classified to section 3508 (b) of Title 20, Education.

The table below lists the classification updates, since Jan. 3, 2012, for this section. Updates to a broader range of sections may be found at the update page for containing chapter, title, etc.

The most recent Classification Table update that we have noticed was Tuesday, August 13, 2013

An empty table indicates that we see no relevant changes listed in the classification tables. If you suspect that our system may be missing something, please double-check with the Office of the Law Revision Counsel.

30 USCDescription of ChangeSession YearPublic LawStatutes at Large


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