In a major ruling, the Supreme Court sharply reduced the power of federal agencies to interpret the laws they administer and ruled that courts should rely on their own interpretation. (link.)
The court overruled its landmark 1984 decision, which gave rise to the doctrine known as the Chevron doctrine. Under that doctrine, if Congress has not directly addressed the question at the center of a dispute, a court was required to uphold the Agency’s interpretation of the statute as long as it was reasonable. In a 35-page ruling by Chief Justice John Roberts, the justices rejected that doctrine, calling it “fundamentally misguided.” Continue here