The driver along with the vehicle must meet the requirements before they apply for the voucher.

The vehicle must be registered in one of the following participating counties: Travis, Williamson, Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwell, Tarrant, Brazoria, Fort Bend, Galveston, Harris or Montgomery.

If the vehicle is registered in one of those counties then the person's income must not exceed the 2008 net income requirements based on the number of people in the household.

For a one person household, their income must not exceed $31,200, for a two-person household income must not exceed $42,000 and for a three-person household, $52,800.

Finally, once the applicant passes those first two requirements, the vehicle must pass its own list of requirements.

The vehicle must have failed an emissions test, be registered in a participating county for at least 12 months before the application was submitted, and passed a Texas motor-vehicle safety and emissions inspection within 15 months. Or the vehicle must be at least ten years old and gasoline powered, driven under its own power to the auto dealership, registered in a participating county for at least 12 months before the application was submitted and passed a DPS motor-vehicle safety inspection for a vehicle 24 years old or older, or a safety and emissions inspection for a vehicle 24 years old or less within 15 months of application.

If all the requirements are met, a person can receive up to $3,000 for a car that is a current model year or up to three model years old. The same goes for a truck except the new truck can only be up to two model years old. Whereas, for a hybrid vehicle, a person can get up to $3,500 for a current or previous model year.

Another stipend, the new vehicle must be a federal Tier 2 Bin 5 vehicle and must not cost more than $25,000 before tax, title and license.

To apply for a voucher, log on to www.tceq.state.tx.us.