What changed

California Advanced Clean Trucks (ACT) regulation reporting opened March 1, 2026 with an initial compliance window through April 30. The rule, administered by the California Air Resources Board (CARB), requires fleets with 50+ medium- and heavy-duty trucks operating in California to file an annual fleet inventory and ZEV (zero-emission vehicle) procurement plan.

Twelve states have adopted some version of ACT or ACF (Advanced Clean Fleets) under their state-level air-quality authorities - California, Oregon, Washington, Massachusetts, New York, New Jersey, Connecticut, Rhode Island, Vermont, Maryland, Colorado, and New Mexico. Reporting requirements vary by state but follow the CARB ACT template closely.

What gets reported

The ACT report covers fleet size, vehicle weight class breakdown, ZEV inventory (battery-electric, hydrogen fuel cell, plug-in hybrid), and a procurement schedule showing planned ZEV additions. Penalty for non-filing under CA Title 13 §2014 is $5,000 per violation per day.

Carriers operating exclusively interstate with no in-state-California domiciled operations are technically exempt, but the CARB regulation captures any fleet with 50+ trucks doing business in CA - including out-of-state carriers that drop loads at California shippers.

How to file

Filing is through the CARB Truck Regulation Upload, Compliance, and Reporting System (TRUCRS) at carb.ca.gov. Each truck VIN is required, plus weight class, fuel type, and registered domicile. Most fleet management systems can export the data in CARB-compatible CSV format.

What to do next

Fleets with CA operations should run a TRUCRS test-upload before the April 30 deadline. The system rejects formatting errors and requires a clean upload to confirm filing. Ensure your fleet roster reflects current VIN, weight class, and domicile data - stale data is the most common rejection reason.