Historical textIn force on Sept. 30, 2000Source: annual CFR editions 1996–2004

§ 393.20 Clearance lamps to indicate extreme width and height.

Wording first on file in the 1996 annual edition, superseded by the 2005 annual edition.

govinfo, 1999 edition ↗

Compare with

Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 1999 edition's wording. An amendment that took effect between Oct. 1, 1999 and Sept. 30, 2000 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.

49 CFR § 393.20 — Clearance lamps to indicate extreme width and height.. Text in force on September 30, 2000. This wording effective October 1, 1996 to October 1, 2005. Source: govinfo, 1999 edition, https://www.govinfo.gov/app/details/CFR-1999-title49-vol4/CFR-1999-title49-vol4-sec393-20. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.20?asof=2000-09-30, on October 26, 2026. Unofficial compilation; verify against the official source.

Clearance lamps shall be mounted so as to indicate the extreme width of the motor vehicle (not including mirrors) and as near the top thereof as practicable: Provided, That when rear identification lamps are mounted at the extreme height of the vehicle, rear clearance lamps may be mounted at optional height: And provided further, That when mounting of front clearance lamps at the highest point of a trailer results in such lamps failing to mark the extreme width of the trailer, such lamps may be mounted at optional height but must indicate the extreme width of the trailer. Clearance lamps on truck tractors shall be so located as to indicate the extreme width of the truck tractor cab.

[Figure or graphic omitted. See the official source.]

Diagram to illustrate § 393.20 for mounting of front clearance lamps on truck tractors with sleeper cabs.)

[Figure or graphic omitted. See the official source.]

[33 FR 19735, Dec. 25, 1968, as amended at 34 FR 6851, Apr. 24, 1969]

Amendment history

2 distinct wordings on file since Oct. 1, 1996

Oct. 1, 2005 → presentannual editions 2005–2016diff vs. previous
Oct. 1, 1996 → Oct. 1, 2005annual editions 1996–2004viewing
[33 FR 19735, Dec. 25, 1968, as amended at 34 FR 6851, Apr. 24, 1969]

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.