[Code of Federal Regulations]
[Title 40, Volume 30]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1065.401]

[Page 664-665]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1065_TEST PROCEDURES AND EQUIPMENT--Table of Contents
 
    Subpart E_Engine Selection, Preparation, and Service Accumulation
 
Sec. 1065.401  Selecting a test engine.


    While all engine configurations within a certified engine family 
must comply with the applicable standards in the standard-setting part, 
you are not required to test each configuration for certification.
    (a) Select for testing according to the following guidance the 
engine configuration within the engine family that is most likely to 
exceed an emission standard:
    (1) Test the engine that we specify, whether we do this through 
general guidance or give you specific instructions.
    (2) If we do not tell you which engine to test, follow any 
instructions in the standard-setting part.
    (3) If we do not tell you which engine to test and the standard-
setting part does not include specifications for selecting test engines, 
use good engineering judgment to select the engine configuration within 
the engine family that is most likely to exceed an emission standard.
    (b) In the absence of other information, the following 
characteristics are

[[Page 665]]

appropriate to consider when selecting the engine to test:
    (1) Maximum fueling rates.
    (2) Maximum in-use engine speed (governed or ungoverned, as 
applicable).
    (3) Highest sales volume.
    (c) We may select any engine configuration within the engine family 
for our testing.