Title 42The Public Health and WelfareRelease 119-73

§7550 Definitions

Title 42 › Chapter CHAPTER 85— - AIR POLLUTION PREVENTION AND CONTROL › Subchapter SUBCHAPTER II— - EMISSION STANDARDS FOR MOVING SOURCES › Part Part A— - Motor Vehicle Emission and Fuel Standards › § 7550

Last updated Apr 6, 2026|Official source

Summary

Gives plain meanings for words used in this part. Manufacturer (as used in sections 7521, 7522, 7525, 7541, and 7542) means a person who makes, assembles, or imports new motor vehicles or new motor vehicle engines for resale, or who acts for and is controlled by such a person in distributing them; it does not include a dealer for vehicles the dealer receives in commerce. Motor vehicle means a self-powered vehicle made to carry people or goods on streets or highways. New motor vehicle and new motor vehicle engine mean ones whose legal or equitable title has never been transferred to the first buyer; for imports, they are those made after the effective date of a regulation under section 7521 that applies (or would apply) to them. Dealer means someone who sells or distributes new vehicles or engines to the first buyer. Ultimate purchaser means the first person who in good faith buys a new vehicle or engine for use, not for resale. Commerce means trade that crosses state lines or any trade entirely inside the District of Columbia. The terms vehicle curb weight, GVWR, LDT, light-duty vehicle, and LVW mean what the Administrator’s regulations said on November 15, 1990, and the abbreviations match those terms. Test weight (tw) means vehicle curb weight plus GVWR, divided by 2. Motor vehicle or engine part manufacturer means a person who makes, assembles, or rebuilds parts or components installed in vehicles or engines. Nonroad engine means an internal combustion engine (including its fuel system) that is not used in a motor vehicle or in a vehicle used only for competition, or that is not covered by standards under section 7411 or section 7521. Nonroad vehicle means a vehicle powered by a nonroad engine that is not a motor vehicle and not a competition-only vehicle.

Full Legal Text

Title 42, §7550

The Public Health and Welfare — Source: USLM XML via OLRC

As used in this part—
(1)The term “manufacturer” as used in section 7521, 7522, 7525, 7541, and 7542 of this title means any person engaged in the manufacturing or assembling of new motor vehicles, new motor vehicle engines, new nonroad vehicles or new nonroad engines, or importing such vehicles or engines for resale, or who acts for and is under the control of any such person in connection with the distribution of new motor vehicles, new motor vehicle engines, new nonroad vehicles or new nonroad engines, but shall not include any dealer with respect to new motor vehicles, new motor vehicle engines, new nonroad vehicles or new nonroad engines received by him in commerce.
(2)The term “motor vehicle” means any self-propelled vehicle designed for transporting persons or property on a street or highway.
(3)Except with respect to vehicles or engines imported or offered for importation, the term “new motor vehicle” means a motor vehicle the equitable or legal title to which has never been transferred to an ultimate purchaser; and the term “new motor vehicle engine” means an engine in a new motor vehicle or a motor vehicle engine the equitable or legal title to which has never been transferred to the ultimate purchaser; and with respect to imported vehicles or engines, such terms mean a motor vehicle and engine, respectively, manufactured after the effective date of a regulation issued under section 7521 of this title which is applicable to such vehicle or engine (or which would be applicable to such vehicle or engine had it been manufactured for importation into the United States).
(4)The term “dealer” means any person who is engaged in the sale or the distribution of new motor vehicles or new motor vehicle engines to the ultimate purchaser.
(5)The term “ultimate purchaser” means, with respect to any new motor vehicle or new motor vehicle engine, the first person who in good faith purchases such new motor vehicle or new engine for purposes other than resale.
(6)The term “commerce” means (A) commerce between any place in any State and any place outside thereof; and (B) commerce wholly within the District of Columbia.
(7)The terms “vehicle curb weight”, “gross vehicle weight rating” (GVWR), “light-duty truck” (LDT), light-duty vehicle,11 So in original. Probably should be set off by quotation marks. and “loaded vehicle weight” (LVW) have the meaning provided in regulations promulgated by the Administrator and in effect as of November 15, 1990. The abbreviations in parentheses corresponding to any term referred to in this paragraph shall have the same meaning as the corresponding term.
(8)The term “test weight” and the abbreviation “tw” mean the vehicle curb weight added to the gross vehicle weight rating (gvwr) and divided by 2.
(9)The term “motor vehicle or engine part manufacturer” as used in section 7541 and 7542 of this title means any person engaged in the manufacturing, assembling or rebuilding of any device, system, part, component or element of design which is installed in or on motor vehicles or motor vehicle engines.
(10)The term “nonroad engine” means an internal combustion engine (including the fuel system) that is not used in a motor vehicle or a vehicle used solely for competition, or that is not subject to standards promulgated under section 7411 of this title or section 7521 of this title.
(11)The term “nonroad vehicle” means a vehicle that is powered by a nonroad engine and that is not a motor vehicle or a vehicle used solely for competition.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

Codification Section was formerly classified to section 1857f–7 of this title.

Amendments

1990—Par. (1). Pub. L. 101–549, § 223(b), inserted references to new nonroad vehicles or new nonroad engines. Pars. (7) to (11). Pub. L. 101–549, § 223(a), added pars. (7) to (11). 1970—Pub. L. 91–604, § 11(a)(2)(A), substituted “part” for “subchapter”. Par. (1). Pub. L. 91–604, § 10(d)(1), inserted reference to section 7521 of this title. Par. (3). Pub. L. 91–604, § 10(d)(2), inserted provisions which defined such terms with respect to imported vehicles or engines. 1967—Pub. L. 90–148 inserted “as used in section 7522, 7525, 7541, and 7542 of this title” after “manufacturer” in par. (1).

Reference

Citations & Metadata

Citation

42 U.S.C. § 7550

Title 42The Public Health and Welfare

Last Updated

Apr 6, 2026

Release point: 119-73