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. Chevron v Natural Resources Defense Council (Supreme Court Decision), Decisions and Verdicts, Conservatism (US Politics), Environmental Protection Agency, Supreme Court (US), Natural Resources Defense Council, Regulation and Deregulation of Industry 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. NYT > Business