[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR90.117]

[Page 186]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 90--CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR 
BELOW 19 KILOWATTS--Table of Contents
 
       Subpart B--Emission Standards and Certification Provisions
 
Sec. 90.117  Certification procedure--test engine selection.

    (a) For Phase 1 engines, the manufacturer must select, from each 
engine family, a test engine that the manufacturer determines to be most 
likely to exceed the emission standard. For Phase 2 engines, the 
manufacturer must select, from each engine family, a test engine of a 
configuration that the manufacturer determines to be most likely to 
exceed the HC+NOX (NMHC+NOX) Family Emission Limit 
(FEL), or HC+NOX (NMHC+NOX) standard if no FEL is 
applicable.
    (b) The test engine must be constructed to be representative of 
production engines.

[60 FR 34598, July 3, 1995, as amended at 64 FR 15239, Mar. 30, 1999]