A San Francisco environmental group is the first to offer a legal challenge to the Bush administration's new light-truck fuel economy standards for the 2008-11 model years.
The Center for Biological Diversity filed its lawsuit Thursday, April 6. That was the same day the rules became official with publication in the government record for legal notices, the Federal Register.
The lawsuit alleges the administration did not adequately address the new rules' environmental impact. The White House did not properly determine the maximum feasible fuel economy for light trucks as federal law requires, the lawsuit says.
The center also claims the federal rules illegally attempt to keep states from imposing their own controls on greenhouse gas emissions.
The group filed its challenge in the 9th U.S. Circuit Court of Appeals in San Francisco. Federal regulation of vehicle fuel economy must be challenged in circuit courts of appeal rather than federal district courts. The center is represented by the Stanford Environmental Law Clinic.