[Code of Federal Regulations]
[Title 40, Volume 22]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR205.57-3]

[Page 121]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 205--TRANSPORTATION EQUIPMENT NOISE EMISSION CONTROLS--Table of Contents
 
                   Subpart B--Medium and Heavy Trucks
 
Sec. 205.57-3  Test vehicle preparation.

    (a) Prior to the official test, the test vehicle selected in 
accordance with Sec. 205-57-2 shall not be prepared, tested, modified, 
adjusted, or maintained in any manner unless such adjustments, 
preparation, modification and/or tests are part of the manufacturer's 
prescribed manufacturing and inspection procedures, and are documented 
in the manufacturer's internal vehicle assembly and inspection 
procedures or unless such adjustments and/or tests are required or 
permitted under this subpart or are approved in advance by the 
Administrator. For purposes of this section, prescribed manufacturing 
and inspection procedures include quality control testing and assembly 
procedures normally performed by the manufacturer on like products 
during early production so long as the resulting testing is not biased 
by the procedure. In the case of imported products the manufacturer may 
perform adjustments, preparations, modification and/or tests normally 
performed at the port of entry by the manufacturer to prepare the 
vehicle for delivery to a dealer or customer.
    (b) Equipment or fixtures necessary to conduct the test may be 
installed on the vehicle: Provided, That such equipment or fixtures 
shall have no effect on the noise emissions of the vehicle, as 
determined by measurement methodology.
    (c) In the event of vehicle malfunction (i.e., failure to start, 
misfiring cylinder, etc.) the manufacturer may perform the maintenance 
that is necessary to enable the vehicle to operate in a normal manner.
    (d) No quality control, testing, assembly or selection procedures 
shall be used on the completed vehicle or any portion thereof, including 
parts and subassemblies, that will not normally be used during the 
production and assembly of all other vehicles of the category which will 
be distributed in commerce, unless such procedures are required or 
permitted under this subpart.

[47 FR 57715, Dec. 28, 1982; 48 FR 27039, June 13, 1983]