Current textIn force on Nov. 9, 2021Source: eCFR

§ 393.89 Buses, driveshaft protection.

Current wording, first on file in the 1996 annual edition.

eCFR as of November 9, 2021 ↗

49 CFR § 393.89 — Buses, driveshaft protection.. Text in force on November 9, 2021. This wording effective October 1, 1996 to present. Source: eCFR as of November 9, 2021, https://www.ecfr.gov/on/2021-11-09/title-49/section-393.89. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.89?asof=2021-11-09, on October 26, 2026. Unofficial compilation; verify against the official source.

Any driveshaft extending lengthways under the floor of the passenger compartment of a bus shall be protected by means of at least one guard or bracket at that end of the shaft which is provided with a sliding connection (spline or other such device) to prevent the whipping of the shaft in the event of failure thereof or of any of its component parts. A shaft contained within a torque tube shall not require any such device.

[33 FR 19735, Dec. 25, 1968, as amended at 53 FR 49402, Dec. 7, 1988]

Amendment history

1 distinct wording on file since Oct. 1, 1996

Oct. 1, 1996 → presentannual editions 1996–2016viewing
[33 FR 19735, Dec. 25, 1968, as amended at 53 FR 49402, Dec. 7, 1988]

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.