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

§ 325.21 Scope of the rules in this subpart.

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

eCFR as of December 9, 2021 ↗

49 CFR § 325.21 — Scope of the rules in this subpart.. Text in force on December 9, 2021. This wording effective October 1, 1996 to present. Source: eCFR as of December 9, 2021, https://www.ecfr.gov/on/2021-12-09/title-49/section-325.21. Retrieved from FMCSR.com, https://fmcsr.com/reg/325.21?asof=2021-12-09, on October 26, 2026. Unofficial compilation; verify against the official source.

The rules in this subpart specify criteria for sound level measurement systems which are used to make the sound level measurements specified in subpart D and subpart E of this part.

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.