In-use Vehicles
Emissions requirements set in
Resolution 910, 2008 are in place for existing vehicles of model years previous to 2010. This resolution amended
Resolution 005, which had been in force since 1996. The table below shows basic emissions standards for in-use gasoline and diesel vehicles.
Emission Standards for Existing Vehicles (All Weight Classes)
| Gasoline, LPG, CNG | Diesel |
Contaminant | CO | HC | Smoke Opacity |
Model Year | % vol. | ppm | % |
up to 1970 | 5.0 | 800 | 50% |
1971-1984 | 4.0 | 650 | 45% |
1985-1997 | 3.0 | 400 | 40% |
1998-2009 | 1.0 | 200 | 35% |
2010 & later | 0.8 | 160 | |