The Tractor-Trailer Greenhouse Gas (GHG) regulation – Applies to 53-foot or longer box-type trailers, including both dry-van and refrigerated-van trailers, and all heavy-duty tractors that pull them on California highways. All owners, regardless of where their vehicles are registered, must comply with the regulation when operating in California. Fleets must register to take advantage of short haul, local haul or storage trailer exemptions and passes. Any person residing in California who sells an affected vehicle must provide a disclosure notice about the regulation to the buyer. For more information please contact our office.