[Code of Federal Regulations]
[Title 40, Volume 16]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR86.001-2]

[Page 30]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 86--CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES--Table of Contents
 
  Subpart A--General Provisions for Emission Regulations for 1977 and 
 
Sec. 86.001-2  Definitions.

    The definitions of Sec. 86.000-2 continue to apply to 2000 and later 
model year vehicles. The definitions listed in this section apply 
beginning with the 2001 model year.
    Useful life means:
    (1) For light-duty vehicles, and for light light-duty trucks not 
subject to the Tier 0 standards of Sec. 86.094-9(a), intermediate useful 
life and/or full useful life. Intermediate useful life is a period of 
use of 5 years or 50,000 miles, whichever occurs first. Full useful life 
is a period of use of 10 years or 100,000 miles, whichever occurs first, 
except as otherwise noted in Sec. 86.094-9. The useful life of 
evaporative and/or refueling emission control systems on the portion of 
these vehicles subject to the evaporative emission test requirements of 
Sec. 86.130-96, and/or the refueling emission test requirements of 
Sec. 86.151-2001, is defined as a period of use of 10 years or 100,000 
miles, whichever occurs first.
    (2) For light light-duty trucks subject to the Tier 0 standards of 
Sec. 86.094-9(a), and for heavy light-duty truck engine families, 
intermediate and/or full useful life. Intermediate useful life is a 
period of use of 5 years or 50,000 miles, whichever occurs first. Full 
useful life is a period of use of 11 years or 120,000 miles, whichever 
occurs first. The useful life of evaporative emission and/or refueling 
control systems on the portion of these vehicles subject to the 
evaporative emission test requirements of Sec. 86.130-96, and/or the 
refueling emission test requirements of Sec. 86.151-2001, is also 
defined as a period of 11 years or 120,000 miles, whichever occurs 
first.
    (3) For an Otto-cycle heavy-duty engine family:
    (i) For hydrocarbon and carbon monoxide standards, a period of use 
of 8 years or 110,000 miles, whichever first occurs.
    (ii) For the oxides of nitrogen standard, a period of use of 10 
years or 110,000 miles, whichever first occurs.
    (iii) For the portion of evaporative emission control systems 
subject to the evaporative emission test requirements of Sec. 86.1230-
96, a period of use of 10 years or 110,000 miles, whichever occurs 
first.
    (4) For a diesel heavy-duty engine family:
    (i) For light heavy-duty diesel engines, for hydrocarbon, carbon 
monoxide, and particulate standards, a period of use of 8 years or 
110,000 miles, whichever first occurs.
    (ii) For light heavy-duty diesel engines, for the oxides of nitrogen 
standard, a period of use of 10 years or 110,000 miles, whichever first 
occurs.
    (iii) For medium heavy-duty diesel engines, for hydrocarbon, carbon 
monoxide, and particulate standards, a period of use of 8 years or 
185,000 miles, whichever first occurs.
    (iv) For medium heavy-duty diesel engines, for the oxides of 
nitrogen standard, a period of use of 10 years or 185,000 miles, 
whichever first occurs.
    (v) For heavy heavy-duty diesel engines, for hydrocarbon, carbon 
monoxide, and particulate standards, a period of use of 8 years or 
290,000 miles, whichever first occurs, except as provided in paragraph 
(4)(vii) of this definition.
    (vi) For heavy heavy-duty diesel engines, for the oxides of nitrogen 
standard, a period of use of 10 years or 290,000 miles, whichever first 
occurs.
    (vii) For heavy heavy-duty diesel engines used in urban buses, for 
the particulate standard, a period of use of 10 years or 290,000 miles, 
whichever first occurs.

[59 FR 16281, Apr. 6, 1994, as amended at 61 FR 54886, Oct. 22, 1996]