The California Air Resources Board has extended the registration deadline for the Small Fleet Compliance Plan to Jan. 1.

This extension will provide fleets that have not already registered to use a compliance option under the regulation to participate in the extended phase-in option of the Small Fleet Compliance Plan that begins in 2013 and ends in 2016.

The Tractor-Trailer GHG Regulation applies to 53-foot or longer dry van or refrigerated van trailers and the tractors that pull them on California highways.

The regulation requires tractor-trailers operating in California to use tractors and box-type trailers that use certain aerodynamic equipment and low rolling resistance tires, as verified by the U.S. Environmental Protection Agency SmartWay program, to meet specified fuel efficiency improvements.

The regulation establishes specific compliance deadlines for trailers based on fleet size and model year. Specifically, small fleets with 20 or fewer trailers may either: Bring all their pre-2011 model year trailers into compliance by Jan. 1, 2013, or phase-in compliance over several years, between 2013 and 2016, if they register by the registration deadline.

That deadline has been extended from Sept. 1 of this year to Jan. 1, 2013.

For further information about the regulation, Advisory Mail-Out 12-17, training, outreach efforts, compliance tools, or the full text of the Tractor-Trailer GHG Regulation, please visit .