[Code of Federal Regulations]
[Title 40, Volume 16]
[Revised as of July 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR80.59]

[Page 688-689]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 80_REGULATION OF FUELS AND FUEL ADDITIVES--Table of Contents
 
                     Subpart D_Reformulated Gasoline
 
Sec. 80.59  General test fleet requirements for vehicle testing.

    (a) The test fleet must consist of only 1989-91 MY vehicles which 
are technologically equivalent to 1990 MY vehicles, or of 1986-88 MY 
vehicles for which no changes to the engine or exhaust system that would 
significantly affect emissions have been made through the 1990 model 
year. To be technologically equivalent vehicles at

[[Page 689]]

minimum must have closed-loop systems and possess adaptive learning.
    (b) No maintenance or replacement of any vehicle component is 
permitted except when necessary to ensure operator safety or as 
specifically permitted in Sec. 80.60 and Sec. 80.61. All vehicle 
maintenance procedures must be reported to the Administrator.
    (c) Each vehicle in the test fleet shall have no fewer than 4,000 
miles of accumulated mileage prior to being included in the test 
program.

[59 FR 7813, Feb. 16, 1994, as amended at 59 FR 36962, July 20, 1994]