Current textIn force on Oct. 29, 2021Source: eCFR
§ 325.31 Scope of the rules in this subpart.
Current wording, first on file in the 1996 annual edition.
49 CFR § 325.31 — Scope of the rules in this subpart.. Text in force on October 29, 2021. This wording effective October 1, 1996 to present. Source: eCFR as of October 29, 2021, https://www.ecfr.gov/on/2021-10-29/title-49/section-325.31. Retrieved from FMCSR.com, https://fmcsr.com/reg/325.31?asof=2021-10-29, on October 26, 2026. Unofficial compilation; verify against the official source.
The rules in this subpart specify conditions and procedures for measurement of the sound level generated by a motor vehicle engaged in a highway operation for the purpose of ascertaining whether the motor vehicle conforms to the Standards for Highway Operations set forth in 40 CFR 202.20.
Amendment history
1 distinct wording on file since Oct. 1, 1996A 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.