Current textIn force on Oct. 1, 2008Source: annual CFR editions 1996–2016

§ 325.71 Scope of the rules in this subpart.

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

govinfo, 2008 edition ↗

Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2008 edition's wording. An amendment that took effect between Oct. 1, 2008 and Oct. 1, 2008 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.

49 CFR § 325.71 — Scope of the rules in this subpart.. Text in force on October 1, 2008. This wording effective October 1, 1996 to present. Source: govinfo, 2008 edition, https://www.govinfo.gov/app/details/CFR-2008-title49-vol5/CFR-2008-title49-vol5-sec325-71. Retrieved from FMCSR.com, https://fmcsr.com/reg/325.71?asof=2008-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) The rules in this subpart specify correction factors which are added to, or subtracted from, the reading of the sound level generated by a motor vehicle, as displayed on a sound level measurement system, during the measurement of the motor vehicle's sound level emissions at a test site which is not a standard site.

(b) The purpose of adding or subtracting a correction factor is to equate the sound level reading actually generated by the motor vehicle to the sound level reading it would have generated if the measurement had been made at a standard test site.

Amendment history

1 distinct wording on file since Oct. 1, 1996

Oct. 1, 1996 → presentannual editions 1996–2016viewing

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.