[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: 40CFR90.204]

[Page 192-193]
 
                   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. 90.204  Averaging.

    (a) Negative credits from engine families with FELs above the 
applicable emission standard must be offset by positive credits from 
engine families having FELs below the applicable emission standard, as 
allowed under

[[Page 193]]

the provisions of this subpart. Averaging of credits in this manner is 
used to determine compliance under Sec. 90.207(b).
    (b) Cross-class averaging of credits is allowed across all classes 
of nonroad spark-ignition engines at or below 19 kW.
    (c) Credits used in averaging for a given model year may be obtained 
from credits generated in the same model year by another engine family, 
credits banked in previous model years, or credits of the same or 
previous model year obtained through trading subject to the provisions 
of Sec. 90.205(a). The restrictions of this paragraph notwithstanding, 
credits from a given model year may be used to address credit needs of 
previous model year engines as allowed under Sec. 90.207(c).
    (d) The use of credits generated under the early banking provisions 
of Sec. 90.205(b) is subject to regulations under this subpart.

[64 FR 15239, Mar. 30, 1999, as amended at 65 FR 24308, Apr. 25, 2000]