[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: 40CFR90.202]

[Page 191]
 
                   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 C--Certification Averaging, Banking, and Trading Provisions
 
Sec. 90.202  Definitions.

    The definitions in subpart A of this part apply to this subpart. The 
following definitions also apply to this subpart:
    Averaging means the exchange of emission credits between engine 
families within a given manufacturer's product line.
    Banking means the retention of emission credits by the manufacturer 
generating the emission credits or obtaining such credits through 
trading, for use in future model year averaging or trading as permitted 
in this part.
    Emission credits represent the amount of emission reduction or 
exceedance, by an engine family, below or above the applicable 
HC+NOX (NMHC+NOX) emission standard, respectively. 
FELs below the standard create ``positive credits,'' while FELs above 
the standard create ``negative credits.'' In addition, ``projected 
credits'' refer to emission credits based on the projected applicable 
production volume of the engine family. ``Reserved credits'' are 
emission credits generated within a model year waiting to be reported to 
EPA at the end of the model year. ``Actual credits'' refer to emission 
credits based on actual applicable production volume as contained in the 
end-of-year reports submitted to EPA. Some or all of these credits may 
be revoked if EPA review of the end-of-year reports or any subsequent 
audit action(s) reveals problems or errors of any nature with credit 
computations.
    Trading means the exchange of emission credits between 
manufacturers.