Overview of Compliance Requirements Based on Regulation Adopted on April 25, 2014

Topics covered here include:

Core Requirements

In general the regulation requires vehicle owners comply with particulate matter (PM) Best Available Control Technology (PM BACT) first, and then meet 2010 engine emission standards later.

ARBs primary portal to the information on the Truck and Bus Regulation is:
Truck and Bus Regulation Fact Sheets and Reporting Documents

ARB has a decent compliance tool for assessing most (but not all) of your compliance options. Go to:
Truck and Bus Regulation Fleet Compliance Assistance Tool

Finally, the regulation overview does not specifically address provisions and changes governing agricultural or logging trucks or school buses. ARB has FAQs covering a variety of the topic including these. See:
Truck and Bus Regulation Fact Sheets and Reporting Documents

A word of caution here. Be careful with the FAQs. If ARB makes any regulation changes the FAQs can be out of date.

Vehicle Compliance Classes GVWR

The regulation divides vehicles into two groups for compliance purposes.

  1. Vehicles with a gross vehicle weight rating (GVWR) of 14,001 to 26,000 lbs:
    First possible compliance date of Jan 1, 2015.
  2. Vehicles with a GVWR more than 26,000 lbs. First possible compliance date wasJan 1, 2012.

ARB defines GVWR as the gross vehicle weight rating (GVWR) issued by the vehicle manufacturer and is the weight of the vehicle plus fuel, passengers, cargo, and trailer tongue weight. It may sometimes be listed as gross weight. The GVWR is not the same as the unladed weight, gross combined weight rating, towing weight rating or registered weight rating. The manufacturer's original GVWR label is commonly found on the truck door jamb or on the inside of the door.

Engine Model Year – Engine Emission Control Labels

Compliance dates are drive to a large extent by engine model year. The only way to verify the engine model year with certainty is via the engine’s emission control labels, also called engine control label or ECL. It is that character in the ECL that gives the engine model year. For example:

N – 1992 X – 1999 6 – 2006 D - 2013
P – 1993 Y – 2000 7 – 2007 E - 2014
R – 1994 1 – 2001 8 – 2008
S – 1995 2 – 2002 9 – 2009
T – 1996 3 – 2003 A – 2010
V – 1997 4 – 2004 B – 2011
W – 1998 5 – 2005 C – 2012

ARB has a regulation that requires diesel trucks with a GVWR of more than 10,000 lbs with 1974 or newer engines have readable ECLs. Failure to have a readable ECL can result in fines. If an engine is missing an ECL only the engine distributor can install a replacement label. The cost of replacement labels runs from ~$150 to ~$350 depending on the engine distributor.