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Section 325.1
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Effective date |
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Section 325.3
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Definitions |
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Section 325.5
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Allowable noise levels |
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Section 325.7
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Measurement tolerances |
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Section 325.9
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Issuance, amendment, and revocation of the rules in this part |
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Section 325.11
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Inspection and examination of motor vehicles |
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Section 325.13
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Scope of the rules in this subpart |
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Section 325.21
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Type of measurement systems which may be used |
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Section 325.23
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Calibration of measurement systems |
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Section 325.25
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Use of a windscreen |
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Section 325.27
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Scope of the rules in this subpart |
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Section 325.31
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Site characteristics; highway operations |
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Section 325.33
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Ambient conditions; highway operations |
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Section 325.35
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Location and operation of sound level measurement system; highway operations |
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Section 325.37
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Measurement procedure; highway operations |
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Section 325.39
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Scope of the rules in this subpart |
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Section 325.51
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Site characteristics; stationary test |
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Section 325.53
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Ambient conditions; stationary test |
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Section 325.55
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Location and operation of sound level measurement systems; stationary test |
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Section 325.57
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Measurement procedure; stationary test |
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Section 325.59
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Scope of the rules in this subpart |
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Section 325.71
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Microphone distance correction factors |
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Section 325.73
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Ground surface correction factors |
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Section 325.75
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Computation of open site requirements--nonstandard sites |
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Section 325.77
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Application of correction factors |
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Section 325.79
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Exhaust systems |
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Section 325.91
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Tires |
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Section 325.93
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What is the Motor Carrier Safety Assistance Program (MCSAP)? |