- Gasoline - 1976 model-year and newer vehicles powered solely or in combination by Gasoline (Includes hybrid vehicles - beginning January 2015)
- Propane, Natural gas, Methanol/ethanol, Diesel - 1998 model-year and newer vehicles with a gross vehicle weight rating (GVWR) 14,000 ,pounds and less powered solely or in combination by Diesel, Propane, Natural gas, Methanol/ethanol.
- Gasoline vehicles 1975 model-year and older.
- Gasoline vehicles eight or less model-years old are exempt from the biennial inspection.
- Gasoline vehicles four or less model-years old are exempt from inspection upon change of ownership.
- Diesel vehicles with a GVWR of 14,001 and more
- Vehicles powered solely by electricity
- Two-cylinder or less, Two-stroke (two cycle) engines, excluding rotary engines, Motorcycles
- Until further notice, CNG, LNG or LPG vehicles with a GVWR of 14,001 and more are exempted.