[Code of Federal Regulations]
[Title 40, Volume 31]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1048.405]

[Page 576]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1048_CONTROL OF EMISSIONS FROM NEW, LARGE NONROAD 
SPARK-IGNITION ENGINES--Table of Contents
 
                    Subpart E_Testing In-use Engines
 
Sec.  1048.405  How does this program work?

    (a) You must test in-use engines, for exhaust emissions, from the 
families we select. We may select up to 25 percent of your engine 
families in any model year--or one engine family if you have three or 
fewer families. We will select engine families for testing before the 
end of the model year. When we select an engine family for testing, we 
may specify that you preferentially test engines based on fuel type or 
equipment type. In addition, we may identify specific modes of operation 
or sampling times. You may choose to test additional engine families 
that we do not select.
    (b) Send us an in-use testing plan within 12 calendar months after 
we direct you to test a particular engine family. Complete the testing 
within 24 calendar months after we approve your plan.
    (c) You may need to test engines from more than one model year at a 
given time.