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“We are encouraged by several proposed adjustments that should help lower costs and ease implementation,” ATA Vice President of Energy and Environmental Affairs Patrick Kelly said.

The EPA proposal published Sept. 30 applies to everything from residential air conditioning to retail food refrigeration and semiconductor manufacturing.

At least eight cabinet departments comprising more than two-thirds of the federal workforce had detailed their shutdown plans by the afternoon of Sept. 29.

Tesla urged U.S. environmental regulators to maintain ambitious tailpipe emissions standards that were put in place to push the industry to sell electric vehicles in larger numbers.

This time EPA is targeting the California Air Resources Board’s Clean Truck Check law, also known as the Heavy-Duty Inspection and Maintenance Program.

"With prolonged weakness in freight demand and inflationary cost pressures, the rule’s 2027 implementation timeline threatens to intensify strain across our industry," ATA said.

“We have heard loud and clear from small businesses across the United States that the current DEF system is unacceptable," EPA Administrator Lee Zeldin said.

Daimler, International, Paccar and Volvo Group are suing the California Air Resources Board on grounds that federal actions vacated the state’s efforts to enforce its own emissions rules.

GHG3 was rolled out under the Biden administration but came under heavy fire from trucking stakeholders, many of whom characterized it as damaging to carriers.

Days after the engine's first showcase at ATA's TMC 2025 annual meeting, the Trump administration warned EPA regulations for heavy-duty trucks would be reassessed, with rollback likely.