[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR325.51]

[Page 13]
 
                        TITLE 49--TRANSPORTATION
 
                      DEPARTMENT OF TRANSPORTATION
 
PART 325_COMPLIANCE WITH INTERSTATE MOTOR CARRIER NOISE EMISSION 
STANDARDS--Table of Contents
 
        Subpart E_Measurement of Noise Emissions; Stationary Test
 
Sec.  325.51  Scope of the rules in this subpart.


    (a) The rules in this subpart specify conditions and procedures for 
measuring the sound level generated by a vehicle when the vehicle's 
engine is rapidly accelerated from idle to governed speed at wide open 
throttle with the vehicle stationary, its transmission in neutral, and 
its clutch engaged, for the purpose of ascertaining whether the motor 
vehicle conforms to the Standard for Operation Under Stationary Test, 40 
CFR 202.21.
    (b) The rules in this subpart apply only to a motor vehicle that is 
equipped with an engine speed governor.
    (c) Tests conducted in accordance with the rules of this subpart may 
be made on either side of the vehicle.