[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: 40CFR91.204]

[Page 312-313]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 91--CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES--Table of 
Contents
 
          Subpart C--Averaging, Banking, and Trading Provisions
 
Sec. 91.204  Averaging.

    (a) Negative credits from engine families with FELs above the 
applicable emission standard must be offset by positive credits from 
engine families below the applicable emission standard, as allowed under 
the provisions of this subpart. Averaging of credits in this manner is 
used to determine compliance under Sec. 91.207(b).

[[Page 313]]

    (b) For model years through 2000, outboard credits may not be summed 
with personal watercraft credits, or vice versa, for purposes of 
compliance under Sec. 91.207, except manufacturers may, at their 
discretion, include personal watercraft credits with outboard credits 
upon demonstration to the satisfaction of the Administrator that the 
personal watercraft engine is installed in a hybrid vessel that is 
smaller than a typical sterndrive or inboard vessel and larger than a 
typical personal watercraft. For model year 2001 and later, 
manufacturers must sum credits generated from outboard and personal 
watercraft to determine compliance under Sec. 91.207.
    (c) Credits used in averaging may be obtained from credits generated 
by another engine family as allowed under Sec. 91.204(b), in the same 
model year, credits banked in the three previous model years, or credits 
obtained through trading.