# 85.1902 Definitions.
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 CO<sub>2,</sub> CH<sub>4</sub>, N<sub>2</sub>O, 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]