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Reading the regulations as they stood on October 1, 2001. Current text may differ.Switch to current
Historical textIn force on Oct. 1, 2001Source: annual CFR editions 1996–2004

§ 393.63 Windows, markings.

Wording first on file in the 1996 annual edition, superseded by the 2005 annual edition.

govinfo, 2001 edition ↗
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2001 edition's wording. An amendment that took effect between Oct. 1, 2001 and Oct. 1, 2001 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
49 CFR § 393.63 — Windows, markings.. Text in force on October 1, 2001. This wording effective October 1, 1996 to October 1, 2005. Source: govinfo, 2001 edition, https://www.govinfo.gov/app/details/CFR-2001-title49-vol4/CFR-2001-title49-vol4-sec393-63. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.63?asof=2001-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) On a bus manufactured before September 1, 1973, each bus push-out window and any other bus escape window glazed with laminated safety glass required in § 393.61 shall be identified as such by clearly legible and visible signs, lettering, or decalcomania. Such marking shall include appropriate wording to indicate that it is an escape window and also the method to be used for obtaining emergency exit.

(b) On a bus manufactured on and after September 1, 1973, emergency exits required in § 393.61 shall be marked to conform to Federal Motor Vehicle Safety Standard No. 217 (§ 571.217), of this title.

(c) A bus manufactured before September 1, 1973, may mark emergency exits to conform to Federal Motor Vehicle Safety Standard No. 217 (§ 571.217), of this title in lieu of conforming to paragraph (a) of this section.

[37 FR 11678, June 10, 1972]

Amendment history

2 distinct wordings on file since Oct. 1, 1996
  1. Oct. 1, 2005 → presentannual editions 2005–2016diff vs. previous
  2. Oct. 1, 1996 → Oct. 1, 2005annual editions 1996–2004viewing
    [37 FR 11678, June 10, 1972]

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.