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Pick a part and two dates. Every section whose wording changed in between is listed with a link to the exact diff. Built for the deposition question "has this rule changed since the crash?"
Part 325 — Compliance with Interstate Motor Carrier Noise Emission Standards
Between Sept. 17, 2020 and today (current through Oct. 15, 2026): 1 amended, 0 added, 0 removed, 27 unchanged.
- Amended§ 325.13 Inspection and examination of motor vehicles.View diffChanged Nov. 17, 2023
Unchanged (27)
- § 325.1 Scope of the rules in this part.
- § 325.3 [Reserved]
- § 325.5 Definitions.
- § 325.7 Allowable noise levels.
- § 325.9 Measurement tolerances.
- § 325.11 Issuance, amendment, and revocation of the rules in this part.
- § 325.21 Scope of the rules in this subpart.
- § 325.23 Type of measurement systems which may be used.
- § 325.25 Calibration of measurement systems.
- § 325.27 Use of a windscreen.
- § 325.31 Scope of the rules in this subpart.
- § 325.33 Site characteristics; highway operations.
- § 325.35 Ambient conditions; highway operations.
- § 325.37 Location and operation of sound level measurement system; highway operations.
- § 325.39 Measurement procedure; highway operations.
- § 325.51 Scope of the rules in this subpart.
- § 325.53 Site characteristics; stationary test.
- § 325.55 Ambient conditions; stationary test.
- § 325.57 Location and operation of sound level measurement systems; stationary test.
- § 325.59 Measurement procedure; stationary test.
- § 325.71 Scope of the rules in this subpart.
- § 325.73 Microphone distance correction factors. 1
- § 325.75 Ground surface correction factors. 1
- § 325.77 Computation of open site requirements—nonstandard sites.
- § 325.79 Application of correction factors.
- § 325.91 Exhaust systems.
- § 325.93 Tires.