Supreme Court overturns 1984 decision governing judicial interpretation of ambiguous legislation

The Supreme Court June 28 overturned a 1984 ruling in Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc., which required courts to defer to federal agencies to interpret ambiguous laws. Decided by a 6-3 vote, the Court held: "Chevron is overruled. Courts must exercise their independent judgment in deciding whether an agency has acted within its statutory authority, as the APA requires. Careful attention to the judgment of the Executive Branch may help inform that inquiry. And when a particular statute delegates authority to an agency consistent with constitutional limits, courts must respect the delegation, while ensuring that the agency acts within it. But courts need not and under the APA may not defer to an agency interpretation of the law simply because a statute is ambiguous." This ruling will impact federal regulation of public health and other sectors subject to administrative action.