For those with equipment under the Portable Equipment Registration Program (PERP), the California Air Resources Board (CARB) released an updated timeline for phase-out requirements of equipment for two equipment categories. On December 31st, 2024 Large Fleets will be required to phase-out Tier 3 equipment, while smaller fleets will have to replace their registered Tier 2 equipment. As part of the PERP phase-out requirement, any operation of use of Tier 3 engines by larger fleets past the 12/31 deadline will be required to submit a Modification Request to either CARB or their local Air District. Equipment granted this extension must meet Level-3 Emission Control technology, or else it will not be permitted to remain in use. Stay tuned for more updates!