42 U.S. Code § 7585 - Standards for heavy-duty clean-fuel vehicles (GVWR above 8,500 up to 26,000 lbs.)

(a) Model years after 1997; combined NOx and NMHC standard
For classes or categories of heavy-duty vehicles or engines manufactured for the model year 1998 or thereafter and having a GVWR greater than 8,500 lbs. and up to 26,000 lbs. GVWR, the standards under this part for clean-fuel vehicles shall require that combined emissions of oxides of nitrogen (NOx) and nonmethane hydrocarbons (NMHC) shall not exceed 3.15 grams per brake horsepower hour (equivalent to 50 percent of the combined emission standards applicable under section 7521 of this title for such air pollutants in the case of a conventional model year 1994 heavy-duty diesel-fueled vehicle or engine). No standard shall be promulgated as provided in this section for any heavy-duty vehicle of more than 26,000 lbs. GVWR.
(b) Revised standards that are less stringent
(1) The Administrator may promulgate a revised less stringent standard for the vehicles or engines referred to in subsection (a) of this section if the Administrator determines that the 50 percent reduction required under subsection (a) of this section is not technologically feasible for clean diesel-fueled vehicles and engines, taking into account durability, costs, lead time, safety, and other relevant factors. To provide adequate lead time the Administrator shall make a determination with regard to the technological feasibility of such 50 percent reduction before December 31, 1993.
(2) Any person may at any time petition the Administrator to make a determination under paragraph (1). The Administrator shall act on such a petition within 6 months after the petition is filed.
(3) Any revised less stringent standards promulgated as provided in this subsection shall require at least a 30 percent reduction in lieu of the 50 percent reduction referred to in paragraph (1).

Source

(July 14, 1955, ch. 360, title II, § 245, as added Pub. L. 101–549, title II, § 229(a),Nov. 15, 1990, 104 Stat. 2519.)

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40 CFR - Protection of Environment

40 CFR Part 3 - CROSS-MEDIA ELECTRONIC REPORTING

40 CFR Part 6 - PROCEDURES FOR IMPLEMENTING THE NATIONAL ENVIRONMENTAL POLICY ACT AND ASSESSING THE ENVIRONMENTAL EFFECTS ABROAD OF EPA ACTIONS

40 CFR Part 9 - OMB APPROVALS UNDER THE PAPERWORK REDUCTION ACT

40 CFR Part 51 - REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS

40 CFR Part 60 - STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES

40 CFR Part 62 - APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS

40 CFR Part 81 - DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES

40 CFR Part 85 - CONTROL OF AIR POLLUTION FROM MOBILE SOURCES

40 CFR Part 86 - CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES

40 CFR Part 89 - CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES

40 CFR Part 90 - CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR BELOW 19 KILOWATTS

40 CFR Part 91 - CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES

40 CFR Part 92 - CONTROL OF AIR POLLUTION FROM LOCOMOTIVES AND LOCOMOTIVE ENGINES

40 CFR Part 93 - DETERMINING CONFORMITY OF FEDERAL ACTIONS TO STATE OR FEDERAL IMPLEMENTATION PLANS

40 CFR Part 94 - CONTROL OF EMISSIONS FROM MARINE COMPRESSION-IGNITION ENGINES

40 CFR Part 451 - CONCENTRATED AQUATIC ANIMAL PRODUCTION POINT SOURCE CATEGORY

40 CFR Part 1027 - FEES FOR ENGINE, VEHICLE, AND EQUIPMENT COMPLIANCE PROGRAMS

40 CFR Part 1036 - CONTROL OF EMISSIONS FROM NEW AND IN-USE HEAVY-DUTY HIGHWAY ENGINES

40 CFR Part 1037 - CONTROL OF EMISSIONS FROM NEW HEAVY-DUTY MOTOR VEHICLES

40 CFR Part 1039 - CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES

40 CFR Part 1045 - CONTROL OF EMISSIONS FROM SPARK-IGNITION PROPULSION MARINE ENGINES AND VESSELS

40 CFR Part 1048 - CONTROL OF EMISSIONS FROM NEW, LARGE NONROAD SPARK-IGNITION ENGINES

40 CFR Part 1051 - CONTROL OF EMISSIONS FROM RECREATIONAL ENGINES AND VEHICLES

40 CFR Part 1054 - CONTROL OF EMISSIONS FROM NEW, SMALL NONROAD SPARK-IGNITION ENGINES AND EQUIPMENT

40 CFR Part 1060 - CONTROL OF EVAPORATIVE EMISSIONS FROM NEW AND IN-USE NONROAD AND STATIONARY EQUIPMENT

40 CFR Part 1065 - ENGINE-TESTING PROCEDURES

40 CFR Part 1066 - VEHICLE-TESTING PROCEDURES

40 CFR Part 1068 - GENERAL COMPLIANCE PROVISIONS FOR HIGHWAY, STATIONARY, AND NONROAD PROGRAMS

40 CFR Part 1074 - PREEMPTION OF STATE STANDARDS AND PROCEDURES FOR WAIVER OF FEDERAL PREEMPTION FOR NONROAD ENGINES AND NONROAD VEHICLES

 

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