§FMCSR.com
Current textSource: eCFR

§ 393.23 Power supply for lamps.

Current wording, in the annual edition revised as of Oct. 1, 2005.

eCFR (current) ↗
What changedOct. 1, 1996 wording → Oct. 1, 2005 wording (current)+26 added−29 removedHide

LightingAll devicesrequired shalllamps must be electric,powered exceptby thatthe redelectrical liquid-burningsystem lanternsof may be used on the endmotor ofvehicle loadswith in the natureexception of poles,battery pipes,powered andlamps laddersused on projecting toloads.
[70 theFR rear48046, ofAug. the15, motor vehicle.2005]

49 CFR § 393.23 — Power supply for lamps.. Text current through October 22, 2026. This wording effective October 1, 2005 to present. Source: eCFR (current), https://www.ecfr.gov/current/title-49/section-393.23. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.23, on October 26, 2026. Unofficial compilation; verify against the official source.

All required lamps must be powered by the electrical system of the motor vehicle with the exception of battery powered lamps used on projecting loads.

[70 FR 48046, Aug. 15, 2005]

Amendment history

2 distinct wordings on file since Oct. 1, 1996
  1. Oct. 1, 2005 → presentannual editions 2005–2016diff vs. previousviewing
    [70 FR 48046, Aug. 15, 2005]
  2. Oct. 1, 1996 → Oct. 1, 2005annual editions 1996–2004

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. Set a case date in the header to read any earlier wording.