# 49 C.F.R. § 523.6 (2026): Heavy-duty vehicle

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_6

## Section

- **Citation:** 49 C.F.R. § 523.6 (2026)
- **Heading:** Heavy-duty vehicle
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 49 CFR: Transportation / Chapter V: NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 523: VEHICLE CLASSIFICATION / § 523.6: § 523.6   Heavy-duty vehicle.

## Text

(a) A heavy-duty vehicle is any commercial medium- or heavy-duty on-highway vehicle or a work truck, as defined in 49 U.S.C. 32901(a)(7) and (19). For the purpose of this section, heavy-duty vehicles are divided into four regulatory categories as follows:
(1) Heavy-duty pickup trucks and vans;
(2) Heavy-duty vocational vehicles;
(3) Truck tractors with a GVWR above 26,000 pounds; and
(4) Heavy-duty trailers.
(b) The heavy-duty vehicle classification does not include vehicles excluded as specified in 49 CFR 535.3.
[81 FR 74237, Oct. 25, 2016, as amended at 89 FR 52945, June 24, 2024]

## Nearby sections

- [49 C.F.R. § 523.1 (2026) § 523.1   Scope.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_1.md)
- [49 C.F.R. § 523.2 (2026) § 523.2   Definitions.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_2.md)
- [49 C.F.R. § 523.3 (2026) § 523.3   Automobile.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_3.md)
- [49 C.F.R. § 523.4 (2026) § 523.4   Passenger automobile.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_4.md)
- [49 C.F.R. § 523.5 (2026) § 523.5   Non-passenger automobile.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_5.md)
- [49 C.F.R. § 523.6 (2026) § 523.6   Heavy-duty vehicle.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_6.md)
- [49 C.F.R. § 523.7 (2026) § 523.7   Heavy-duty pickup trucks and vans.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_7.md)
- [49 C.F.R. § 523.8 (2026) § 523.8   Heavy-duty vocational vehicle.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_8.md)
- [49 C.F.R. § 523.9 (2026) § 523.9   Truck tractors.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_9.md)
- [49 C.F.R. § 523.10 (2026) § 523.10   Heavy-duty trailers.](https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_10.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T49_P523_S523_6. Check the current official text before relying on it. Not legal advice.