Current textSource: eCFR
§ 325.27 Use of a windscreen.
Current wording, first on file in the 1996 annual edition.
49 CFR § 325.27 — Use of a windscreen.. Text current through October 15, 2026. This wording effective October 1, 1996 to present. Source: eCFR (current), https://www.ecfr.gov/current/title-49/section-325.27. Retrieved from FMCSR.com, https://fmcsr.com/reg/325.27, on October 26, 2026. Unofficial compilation; verify against the official source.
A properly installed windscreen, of the type recommended by the manufacturer of the Sound Level Measurement System, shall be used during the time that noise emission measurements are being taken.
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. Set a case date in the header to read any earlier wording.