Low Mileage Work Trucks Smaller Trucks Based on Regulation Adopted on April 25, 2014

ARB substantially changed this deferred compliance option at its April 25, 2014 board hearing.

The definition of what constitutes a "low mileage work truck" is fairly tortured. Text says it is one of the following truck types that run less than 20,000 miles per year:

As near as I as I can tell the definition of a "low mileage work truck" can be reduced to:

If a truck is so classified and reported the entire fleet of lighter or heavier trucks is required to meet the following PM BACT (diesel particulate filter) schedule:

Compliance Date Percent of all heavier or lighter
vehicles that must have a DPF
(excludes low use)
Jan 1, 2014 33%
Jan 1, 2015 40%
Jan 1, 2016 60%
Jan 1, 2017 80%
Jan 1, 2018 100%

Once the trucks have DPFs then they are subject to the BACT by Model Year replacement schedule (date trucks must meet 2010 engine standards).

Note that any trucks retrofit before Jan 1, 2014 are not subject to 2010 engine standards until Jan 1, 2023.

If a truck is using the low-mileage construction vehicle option it must be labeled.

The letters CT shall be white block lettering on a black background. Both letters shall be at least three inches high on a five by eight inch background. The label shall be located on the left and right door of the vehicle and be in clear view at all times.

Finally, ARB has an FAQ on this topic. Click on "Low Mileage Construction Truck" at:
Truck and Bus Regulation Fact Sheets and Reporting Documents

Note that ARB may (should) change the title of this FAQ to "Low Mileage Work Truck."