N.Y. Comp. Codes R. & Regs. tit. 6, § 217-6.1 – Definitions.

(a) Certified Motor Vehicle Inspector. A person who has been issued a certificate by the Commissioner of Motor Vehicles under section 304-a of the VTL to perform motor vehicle emissions inspections in New York State. Emissions testing requirements for certified motor vehicle inspectors are listed within 15 NYCRR section 79.1.
(b) Department. The New York State Department of Environmental Conservation.
(c) Gross vehicle weight rating (GVWR). The value specified by the manufacturer as the maximum design loaded weight of a single vehicle.
(d) Diagnostic trouble code (DTC). An alphanumeric identifier for a fault condition identified by a vehicle’s on-board diagnostic system.
(e) Light duty truck 1 (LDT1). Any motor vehicle rated at 3,750 pounds GVWR or less, and which has a basic frontal area of 45 square feet or less, which is:
1. (1) designed primarily for transporting property, or is a derivation of such a vehicle;
2. (2) designed primarily for transporting people, and has a capacity of more than 12 persons; or
3. (3) available with special features enabling off-street or off-highway operation and use.
(f) Light duty truck 2 (LDT2). Any motor vehicle rated above 3,751 pounds GVWR, but not greater than 8,500 pounds GVWR, and which has a basic frontal area of 45 square feet or less, which is:
1. (1) designed primarily for transporting property, or is a derivation of such a vehicle;
2. (2) designed primarily for transporting people, and has a capacity of more than 12 persons; or
3. (3) available with special features enabling off-street or off-highway operation and use.
(g) Model year. The manufacturer's annual production period for each engine family which includes January 1st of such calendar year, or, if the manufacturer has no production period, the calendar year. In the case of any motor vehicle manufactured in two or more stages, the time of manufacture shall be the date of completion of the chassis.
(h) Motor vehicle. Motor vehicle shall have the same meaning as all of the following terms: motor vehicle in section 125 of the Vehicle and Traffic Law (VTL) except for those vehicles specifically set forth in 15 NYCRR section 79.2.
(i) Official emissions inspection station. A facility that has obtained a license from the Commissioner of Motor Vehicles under section 303 of the VTL and 15 NYCRR section 79.1.
(j) Passenger car. Passenger car means any motor vehicle designed with a capability for transportation of persons and having a design capacity of 12 persons or less.