HARRISBURG, Pa. (WHTM) — Senate Republicans plan to introduce a package of bills to overhaul Pennsylvania’s vehicle emissions testing program.

One of the bills would exempt most cars, vans, and trucks that are less than nine years old. Another proposal would eliminate annual emissions testing and replace it with a 2-year testing requirement.

Another piece of legislation would exempt seven western and northeastern counties from emissions tests.

Supporters say many counties that require emissions testing are meeting or exceeding federal air quality standards. They say with more fuel-efficient vehicles being produced, about 96 percent of vehicles pass the tests.

Lawmakers are seeking co-sponsors before officially introducing the bills.