The following new heavy duty diesel engines and vehicles are exempt from the Pennsylvania Heavy-Duty Diesel Emissions Control Program requirements of this subchapter:

1. (1) Emergency vehicles.
2. (2) A heavy-duty diesel vehicle transferred by a dealer to another dealer.
3. (3) A heavy-duty diesel vehicle transferred for use exclusively off-highway.
4. (4) A heavy-duty diesel vehicle granted a National security or testing exemption under section 203(b)(1) of the Clean Air Act (42 U.S.C.A. § 7522(b)(1)).
5. (5) A heavy-duty diesel vehicle defined as a military tactical vehicle or engine under Title 13 CCR, Division 3, Chapter 1, Article 1, § 1905, adopted and incorporated by reference.
6. (6) A heavy-duty diesel vehicle sold after May 11, 2004, if the vehicle was registered in this Commonwealth before May 11, 2004.
7. (7) A heavy-duty diesel engine or vehicle for the model years 2005 and 2006 manufactured by an ultra-small volume manufacturer as defined under Title 13 CCR, Division 3, Chapter 1, Article 2, § 1976(f)(2), adopted and incorporated by reference.
8. (8) For model years 2005 and 2006, an urban bus as defined under Title 13 CCR, Division 3, Chapter 1, Article 2, § 1956.2(b)(4), adopted and incorporated by reference.
9. (9) A heavy-duty diesel engine or vehicle that, following a technology review, CARB determines is inappropriate to require compliance with the emission standards and other requirements under Title 13 CCR, Division 3, Chapter 1, Article 2, § 1956.8 for a particular model year.