1973—Subsec. (a). Pub. L. 93–151 incorporated existing first sentence in provisions designated as subsec. (a).

Subsec. (b). Pub. L. 93–151 required the Chairman of the Consumer Product Safety Commission to conduct research to ascertain the safe level of lead in provisions designated as subsec. (b), incorporated existing second sentence as the second sentence of the subsection, substituting requirement of submission of report by the Chairman no later than Dec. 31, 1974, for former similar requirement for submission of a report by the Secretary within one year after Jan. 13, 1971.

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