In General. In this chapter, the following terms have the meanings indicated. Any term that is not defined in this regulation shall be as defined in the California documents incorporated by reference in Regulation .02 of this chapter. Definitions in the California documents shall prevail in any case of discrepancy. Terms Defined. “California Air Resources Board” or “CARB” means the agency, or its successor agency, established and empowered to regulate sources of air pollution in the State of California, including motor vehicles, pursuant to the California Health and Safety Code §39003, as amended or supplemented. “CCR” means the California Code of Regulations. “Class 2b-3” means an on-road vehicle with a GVWR that is 8,501 pounds up to 14,000 pounds. “Class 2b-3 group” means the group of all on-road vehicles with a GVWR that is 8,501 pounds up to 14,000 pounds. “Class 4” means an on-road vehicle with a GVWR that is 14,001 pounds up to 16,000 pounds. “Class 4-8 group” means the group of all on-road vehicles with a GVWR that is 14,001 pounds and above, including “yard tractors” as defined in 13 CCR §1963(c)(20), except for a “tractor” as defined in 13 CCR §1963(c)(18). “Class 5” means an on-road vehicle with a GVWR that is 16,001 pounds up to 19,500 pounds. “Class 6” means an on-road vehicle with a GVWR that is 19,501 pounds up to 26,000 pounds. “Class 7” means an on-road vehicle with a GVWR that is 26,001 pounds up to 33,000 pounds. “Class 7-8 tractor group” means a group of on-road vehicles, that have a GVWR 26,001 pounds and above, including all vehicles that meet the definition of “tractor” as defined in 13 CCR §1963(c)(18), except “yard tractors” as defined in 13 CCR §1963(c)(20). “Class 8” means an on-road vehicle with a GVWR that is 33,001 pounds and above. “Department” means the Maryland Department of the Environment. “Executive Officer” means the Executive Officer of the California Air Resources Board as used in California-adopted statutes, regulations, and procedures related to the California Standards. This meaning is extended for purposes of the application of California Standards in Maryland to include the Secretary, who shall act as the agent of the California Executive Officer in Maryland. “GVWR” means the same as the term “gross vehicle weight rating” as defined at 13 CCR §1963(c). “Model year (MY)” means the following: For tractors and vocational vehicles with a date of manufacture on or after January 1, 2021, the vehicle's model year is the calendar year corresponding to the date of manufacture; however, the vehicle's model year may be designated to be the year before the calendar year corresponding to the date of manufacture if the engine's model year is also from an earlier year. Note that 40 Code of Federal Regulations (CFR) §1037.601(a)(2), as amended October 25, 2016, limits the extent to which vehicle manufacturers may install engines built in earlier calendar years. “NZEV” means the same as the term “near-zero-emission vehicle” as defined at 13 CCR §1963(c). “Ultimate purchaser” means in respect to any vehicle, the first person who in good faith purchases a new motor vehicle for purposes other than resale and registers it with the Maryland Motor Vehicle Administration. “ZEV” means the same as the term “zero-emission vehicle” as defined at 13 CCR §1963(c).