Historical textIn force on Oct. 1, 2002Source: annual CFR editions 1996–2004

§ 393.79 Defrosting device.

Wording first on file in the 1996 annual edition, superseded by the 2005 annual edition.

govinfo, 2002 edition ↗

Compare with

Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2002 edition's wording. An amendment that took effect between Oct. 1, 2002 and Oct. 1, 2002 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.

49 CFR § 393.79 — Defrosting device.. Text in force on October 1, 2002. This wording effective October 1, 1996 to October 1, 2005. Source: govinfo, 2002 edition, https://www.govinfo.gov/app/details/CFR-2002-title49-vol4/CFR-2002-title49-vol4-sec393-79. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.79?asof=2002-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

Every bus, truck, and truck tractor having a windshield, when operating under conditions such that ice, snow, or frost would be likely to collect on the outside of the windshield or condensation on the inside of the windshield, shall be equipped with a device or other means, not manually operated, for preventing or removing such obstructions to the driver's view: Provided, however, That this section shall not apply in driveaway-towaway operations when the driven vehicle is a part of the shipment being delivered.

Amendment history

2 distinct wordings on file since Oct. 1, 1996

Oct. 1, 2005 → presentannual editions 2005–2016diff vs. previous
[70 FR 48054, Aug. 15, 2005]
Oct. 1, 1996 → Oct. 1, 2005annual editions 1996–2004viewing

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.