Supreme Court overturns Chevron decision, curtailing federal agencies' power | 28 June 2024 | The Supreme Court on Friday overturned a landmark decision that gave federal agencies broad regulatory power. The 6-3 decision on the so-called, 40-year-old Chevron decision upends the agencies' authority to issue regulations unless Congress has spoken clearly, according to CBS News. The court split along conservative-liberal ideological lines in the dispute, with Chief Justice John Roberts writing for the conservative majority, the news outlet also reports. The crux of the Chevron decision states federal agencies should be allowed to fill in the details when laws aren't crystal clear.