Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837 (1984), was a landmark case in which the United States Supreme Court set forth the legal test for determining whether to grant deference to a government agency's interpretation of a statute which it administers.[1] The decision articulated a doctrine now known as "Chevron deference".[2] The doctrine consists of a two-part test applied by the court, when appropriate, that is highly deferential to government agencies: "whether the agency's answer is based on a permissible construction [emphasis added] of the statute", so long as Congress has not spoken directly to the precise issue at question.
The decision involved a lawsuit challenging the U.S. government's interpretation of the word "source" in an environmental statute. . .
Chevron is one of the most important decisions in U.S. administrative law, and has been cited in thousands of cases since being issued in 1984. . .
Holding
The Court, in an opinion by Justice John Paul Stevens, upheld the EPA's interpretation. A two-part analysis was born from the Chevron decision (called the "Chevron two-step test"
, where a reviewing court determines:
First, always, is the question whether Congress has directly spoken to the precise question at issue. If the intent of Congress is clear, that is the end of the matter; for the court, as well as the agency, must give effect to the unambiguously expressed intent of Congress. If, however, the court determines Congress has not directly addressed the precise question at issue, the court does not simply impose its own construction on the statute . . . Rather, if the statute is silent or ambiguous with respect to the specific issue, the question for the court is whether the agency's answer is based on a permissible construction of the statute.
Chevron U.S.A. v. NRDC, 467 U.S. 837, 842-43 (1984).