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Emission Standards Reference Guide

Light-Duty Vehicle and Light-Duty Truck -- Tier 0, Tier 1, and National Low Emission Vehicle Implementation Schedule

Vehicle Type

Test Proce dure

Emission Category Emission Standards
Model Year
1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004+
Federal (non NLEV) LDV, LDT1, & LDT2 FTP Tier 0 Cert & In -use 100% 100% 60% max 20% max 0% - - - - - - - Tier 2 Require ments Begin
Tier 1b Certifi-cationa - - 40% min 80% min 100% 100% 100% 100% 100% 100% 100% 100%
Interim In -Use - - 40% min 80% min 60% max 20% max 0% - - - - -
Final In- Usea - - - - 40% 80% 100% 100% 100% 100% 100% 100%
SFTPa Tier 1 Cert & In -Usea - - - - - - - - 40% 80% 100% 100%
LDT3, & LDT4 FTP Tier 0 Cert & In -use 100% 100% 100% 100% 50% max 0% - - - - - -
Tier 1 Certifi- cationa - - - - 50% min 100% 100% 100% 100% 100% 100% 100%
Interim In -Use - - - - 50% min 100% 50% max - - - - -
Final In -Usea - - - - - - 50% min 100% 100% 100% 100% 100%
SFTPa Tier 1 Cert & In -Use - - - - - - - - - - 40% min 80% min
Federal (NLEV) LDV & LDT1 FTP Tier 1 Certifi-
cation
- - - - - - - NE Trading Region All States Trading Region
TLEV - - - - - - - 0.148 NMOG fleet avg.f,g 0.095 NMOG fleet avg.f 0.075 NMOG fleet avg.g 0.075 NMOG fleet avg. 0.075 NMOG fleet avg.
LEV - - - - - - -
ULEV - - - - - - -
ZEV - - - - - - -
SFTP a, c Tier 1 Cert & In -use - - - - - - - - - 25% min 50% min 85% min
TLEV - - - - - - - - -
LEVd Certifi-
cation
- - - - - - - - - 25% min 50% min 85% min
ULEVd - - - - - - - - -
LDT2 FTP Tier 1 Certifi-
cation
- - - - - - - NE Trading Region All States Trading Region
TLEV - - - - - - - 0.19 NMOG fleet avg.f,g 0.124 NMOG fleet avg.f 0.1 NMOG fleet avg.g 0.1 NMOG fleet avg. 0.1 NMOG fleet avg.
LEV - - - - - - -
ULEV - - - - - - -
ZEV - - - - - - -
SFTP a, c Tier 1 Cert & In -use - - - - - - - - - 25% min 50% min 85% min
TLEV - - - - - - - - -
LEVd Certifi-
cation
- - - - - - - - - 25% min 50% min 85% min
ULEVd - - - - - - - - -

Notes:

a  Small volume manufacturer exempt until last year of phase-in.

b  Light-duty vehicle (LDV) may be combined with light-duty truck 1 (LDT1) and LDT2 for Tier 1 phase-in.

c  LDV and LDT1 combined with LDT2 for Supplemental Federal Test Procedure phase-in.

d  Other equivalent schedules allowed.

e  Fleet average derived from 50,000 mile standards.

f  Not applicable to small volume manufacturers.

g  Early credits available.

Code of Federal Regulations (CFR) Citations:

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