The American Trucking Assns. has joined other trade associations in filing an amicas brief with the U.S. Supreme Court in the case of EMA vs. South Coast Air Quality Management District.

Later this year the court will review the 9th Circuit Court’s decision that the district had the authority to impose emission regulations relative to the purchasing and leasing of new vehicles by specific public and private fleet operators.
The rules in question prohibit local fleets from purchasing diesel-fueled vehicles when replacing vehicles.
In its supporting brief, ATA and others argued that the district is preempted from either directly or indirectly adopting or enforcing standards relating to the control of emissions from new motor vehicle engines under the federal Clean Air Act.
In a separate amicus, the U.S. Solicitor General also urged the court to reverse the holding of the 9th Circuit.