VEHICLES SUBJECT TO PROGRAM; EXEMPTIONS.

(a) The inspection and maintenance program applies to any gasoline-powered vehicle that is:

(1) required to be registered in and is primarily operated in an affected county; and

(2) at least two and less than 25 years old; or

(3) subject to test-on-resale requirements under Section 548.3011, Transportation Code.

(b) In addition to a vehicle described by Subsection (a), the program applies to:

(1) a vehicle with United States governmental plates primarily operated in an affected county;

(2) a vehicle operated on a federal facility in an affected county; and

(3) a vehicle primarily operated in an affected county that is exempt from motor vehicle registration requirements or eligible under Chapter 502, Transportation Code, to display an "exempt" license plate.

(c) The Department of Public Safety of the State of Texas by rule may waive program requirements, in accordance with standards adopted by the commission, for certain vehicles and vehicle owners, including:

(1) the registered owner of a vehicle who cannot afford to comply with the program, based on reasonable income standards;

(2) a vehicle that cannot be brought into compliance with emissions standards by performing repairs;

(3) a vehicle:

(A) on which at least $100 has been spent to bring the vehicle into compliance; and

(B) that the department can verify is driven an average of less than 5,000 miles each year; and

(4) a vehicle for which parts are not readily available.

(d) The program does not apply to a:

(1) motorcycle;

(2) slow-moving vehicle as defined by Section 547.001, Transportation Code; or

(3) vehicle that is registered but not operated primarily in a county or group of counties subject to a motor vehicle emissions inspection program established under Subchapter F, Chapter 548, Transportation Code.