PUBLIC LAW 101-549—NOV. 15, 1990 104 STAT. 2513 "(6) COVERED FLEET VEHICLE. — The term 'covered fleet vehicle' means only a motor vehicle which is— "(i) in a vehicle class for which standards are applicable under this part; and "(ii) in a covered fleet which is centrally fueled (or capable of being centrally fueled). No vehicle which under normal operations is garaged at a personal residence at night shall be considered to be a vehicle which is capable of being centrally fueled within the meaning of this paragraph. "(7) CLEAN-FUEL VEHICLE.—The term 'clean-fuel vehicle' means a vehicle in a class or category of vehicles which has been certified to meet for any model year the clean-fuel vehicle standards applicable under this part for that model year to clean-fuel vehicles in that class or category. "SEC. 242. REQUIREMENTS APPLICABLE TO CLEAN FUEL VEHICLES. 42 USC 7582. "(a) PROMULGATION OF STANDARDS. — Not later than 24 months Regulations, after the enactment of the Clean Air Act Amendments of 1990, the Administrator shall promulgate regulations under this part contain- •* ing clean-fuel vehicle standards for the clean-fuel vehicles specified in this part. "(b) OTHER REQUIREMENTS.— Clean-fuel vehicles of up to 8,500 gvwr subject to standards set forth in this part shall comply with all motor vehicle requirements of this title (such as requirements relating to on-board diagnostics, evaporative emissions, etc.) which are applicable to conventional gasoline-fueled vehicles of the same category and model year, except as provided in section 244 with respect to administration and enforcement, and except to the extent that any such requirement is in conflict with the provisions of this part. Clean-fuel vehicles of 8,500 gvwr or greater subject to standards set forth in this part shall comply with all requirements of this title which are applicable in the case of conventional gasoline-fueled or diesel fueled vehicles of the same category and model year, except as provided in section 244 with respect to administration and enforcement, and except to the extent that any such requirement is in conflict with the provisions of this part. "(c) IN-USE USEFUL LIFE AND TESTING. — (1) In the case of light-duty vehicles and light-duty trucks up to 6,000 lbs gvwr, the useful life for purposes of determining in-use compliance with the standards under section 243 shall be— "(A) a period of 5 years or 50,000 miles (or the equivalent) whichever first occurs, in the case of standards applicable for purposes of certification at 50,000 miles; and "(B) a period of 10 years or 100,000 miles (or the equivalent) whichever first occurs, in the case of standards applicable for purposes of certification at 100,000 miles, except that in-use testing shall not be done for a period beyond 7 years or 75,000 miles (or the equivalent) whichever first occurs. "(2) In the case of light-duty trucks of more than 6,000 lbs gvwr, the useful life for purposes of determining in-use compliance with the standards under section 243 shall be— "(A) a period of 5 years or 50,000 miles (or the equivalent) whichever first occurs in the case of standards applicable for purposes of certification at 50,000 miles; and "(B) a period of 11 years or 120,000 miles (or the equivalent) whichever first occurs in the case of standards applicable for
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