Regulations last checked for updates: Nov 24, 2024

Title 49 - Transportation last revised: Nov 18, 2024
All TitlesTitle 49Chapter IIIPart 325Subpart C - Subpart C—Instrumentation
View all text of Subpart C [§ 325.21 - § 325.27]
§ 325.21 - Scope of the rules in this subpart.

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.

authority: 42 U.S.C. 4917; 49 U.S.C. 301; and 49 CFR 1.87
source: 40 FR 42437, Sept. 12, 1975, unless otherwise noted.
cite as: 49 CFR 325.21
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