§FMCSR.com
Historical textIn force on Oct. 1, 2005Source: annual CFR editions 2005–2008

§ 393.1 Scope of the rules in this part.

Wording in the annual edition revised as of Oct. 1, 2005, superseded by the 2009 annual edition.

govinfo, 2005 edition ↗
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2005 edition's wording. An amendment that took effect between Oct. 1, 2005 and Oct. 1, 2005 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
49 CFR § 393.1 — Scope of the rules in this part.. Text in force on October 1, 2005. This wording effective October 1, 2005 to October 1, 2009. Source: govinfo, 2005 edition, https://www.govinfo.gov/app/details/CFR-2005-title49-vol5/CFR-2005-title49-vol5-sec393-1. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.1?asof=2005-10-01, 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) Every employer and employee shall comply and be conversant with the requirements and specifications of this part. No employer shall operate a commercial motor vehicle, or cause or permit it to be operated, unless it is equipped in accordance with the requirements and specifications of this part.

[70 FR 48025, Aug. 15, 2005]

Amendment history

4 distinct wordings on file since Oct. 1, 1996
  1. Oct. 1, 2016 → presentannual edition 2016diff vs. previous
    [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. previousviewing
    [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.