1976—Subsec. (b). Pub. L. 94–284 substituted provision that a standard provide a significantly higher degree of protection from the risk of injury for the provision that the standard impose a higher level of performance.

Subsec. (c). Pub. L. 94–284 substituted requirement that a State standard provide a significantly higher degree of protection from the risk of injury than the standard under this chapter for the requirement that the State standard impose a higher level of performance, eliminated the requirement of a compelling local condition, and inserted the requirement that the Commission make specific findings in determining the burden on interstate commerce.