A foundational 1984 decision had required courts to defer to agencies’ reasonable interpretations of ambiguous statutes, underpinning regulations on health care, safety and the environment.
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The Supreme Court on Friday reduced the authority of executive agencies, sweeping aside a longstanding legal precedent that required courts to defer to the expertise of federal administrators in carrying out laws passed by Congress.
The precedent,
Chevron v. Natural Resources Defense Council, is one of the most cited in American law. There have been 70 Supreme Court decisions relying on Chevron, along with 17,000 in the lower courts.
The decision threatens regulations in countless areas, including the environment, health care and consumer safety.