For the purposes of this subpart and unless otherwise noted:

(a) Act means the Clean Air Act, 42 U.S.C. §§ 7401–7671q, as amended.

(b) Emission-related defect means:

(1) A defect in design, materials, or workmanship in a device, system, or assembly described in the approved Application for Certification that affects any parameter or specification enumerated in appendix VIII of this part; or

(2) A defect in the design, materials, or workmanship in one or more emission-related parts, components, systems, software, or elements of design which must function properly to ensure continued compliance with greenhouse gas emission standards in 40 CFR part 86.

(c) Useful life has the meaning given in section 202(d) of the Act (42 U.S.C.7521(d)) and regulations promulgated thereunder.

(d) Voluntary emissions recall means a repair, adjustment, or modification program voluntarily initiated and conducted by a manufacturer to remedy any emission-related defect for which direct notification of vehicle or engine owners has been provided, including programs to remedy defects related to emissions standards for CO2, CH4, N2O, and/or carbon-related exhaust emissions.

(e) Ultimate purchaser has the meaning given in section 216 of the Act (42 U.S.C.7550).

(f) Manufacturer has the meaning given in section 216 of the Act (42 U.S.C.7550).

[81 FR 73973, Oct. 25, 2016, as amended at 86 FR 34364, June 29, 2021]