§FMCSR.com
Current textIn force on May 11, 2026Source: eCFR

§ 393.1 Scope of the rules in this part.

Current wording, in the annual edition revised as of Oct. 1, 2016.

eCFR as of May 11, 2026 ↗
49 CFR § 393.1 — Scope of the rules in this part.. Text in force on May 11, 2026. This wording effective October 1, 2016 to present. Source: eCFR as of May 11, 2026, https://www.ecfr.gov/on/2026-05-11/title-49/section-393.1. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.1?asof=2026-05-11, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) The rules in this part establish minimum standards for commercial motor vehicles as defined in § 390.5 of this title. Only motor vehicles (as defined in § 390.5) and combinations of motor vehicles which meet the definition of a commercial motor vehicle are subject to the requirements of this part. All requirements that refer to motor vehicles with a GVWR below 4,536 kg (10,001 pounds) are applicable only when the motor vehicle or combination of motor vehicles meets the definition of a commercial motor vehicle.

(b)(1) Every motor carrier and its employees must be knowledgeable of and comply with the requirements and specifications of this part.

(2) Every intermodal equipment provider and its employees or agents responsible for the inspection, repair, and maintenance of intermodal equipment interchanged to motor carriers must be knowledgeable of and comply with the applicable requirements and specifications of this part.

(c) No motor carrier may operate a commercial motor vehicle, or cause or permit such vehicle to be operated, unless it is equipped in accordance with the requirements and specifications of this part.

(d) No intermodal equipment provider may operate intermodal equipment, or cause or permit such equipment to be operated, unless it is equipped in accordance with the requirements and specifications of this part.

(e) The rules in this part do not apply to “pipeline welding trucks” as defined in 49 CFR 390.38(b).

[70 FR 48025, Aug. 15, 2005, as amended at 73 FR 76823, Dec. 17, 2008; 81 FR 47721, July 22, 2016]

Amendment history

4 distinct wordings on file since Oct. 1, 1996
  1. Oct. 1, 2016 → presentannual edition 2016diff vs. previousviewing
    [70 FR 48025, Aug. 15, 2005, as amended at 73 FR 76823, Dec. 17, 2008; 81 FR 47721, July 22, 2016]
  2. Oct. 1, 2009 → Oct. 1, 2016annual editions 2009–2015diff vs. previous
    [70 FR 48025, Aug. 15, 2005, as amended at 73 FR 76823, Dec. 17, 2008]
  3. Oct. 1, 2005 → Oct. 1, 2009annual editions 2005–2008diff vs. previous
    [70 FR 48025, Aug. 15, 2005]
  4. Oct. 1, 1996 → Oct. 1, 2005annual editions 1996–2004
    [54 FR 48617, Nov. 24, 1989]

A new entry appears whenever the regulatory words change between government snapshots. Day-precise from the eCFR (2017 onward); before that, one snapshot per annual CFR edition (revised as of October 1). Bracketed citations are the Federal Register history printed with the section.