...of any other motor vehicle o"r motor vehicle engine, be a period of use set forth in paragraph (1) unless the Administrator determines that a period...use of greater duration or mileage is appropriate. (e) New power sources or propulsion systems. In the event of a new power source or propulsion system...

...case of any other motor vehicle or motor vehicle engine, be a period of use set forth in paragraph (1) unless the Administrator determines that a period...use of greater duration or mileage is appropriate. (e) In the event a new power source or propulsion svstem for new motor vehicles or new motor vehicle...

...case of any other motor vehicle or motor vehicle engine, be a period of use set forth in paragraph (1) unless the Administrator determines that a period...use of greater duration or mileage is appropriate. is submitted for certification pursuant to section 206(a), the Administrator may postpone certification...

...case of any other motor vehicle or motor vehicle engine, be a period of use set forth in paragraph (1) unless the Administrator determines that a period...use of greater duration or mileage is appropriate. (e) In the event a new power source or propulsion system for new motor vehicles or new motor vehicle...

...case of any other motor vehicle or motor vehicle engine, be a period of use set forth in paragraph (1) unless the Administrator determines that a period...use of greater duration or mileage Is appropriate. (e) New power sources or propulsion systems. In the event of a new power source or propulsion system...

...engine (other than motorcycles or motorcycle engines) be a period of use set forth in paragraph (1) unless the Administrator determines that a period...use of greater duration or mileage is appropriate: and (3) in the case of any motorcycle or motorcycle engine, be a period of use the Administrator shall...

...vehicle engine, the period of use set forth in paragraph (1) of this subdivision, unless the state board determines that a period of use of greater duration or mileage is appropriate. The language of subsection 43204(a) is identical to Section 207(a) of the Clean Air Act of 1977, which...

...or SO, 000 miles, whichever first occurs. The same definition pertains to heavy duty vehicle engines unless the Administrator determines that a period...use of greater duration or mileage is appropriate. Initially, the Administrator determined that a period of use of five years, 100,000 miles, or 3,000...

...engine (other than motorcycles or motorcycle engines) be a period of use set forth in paragraph (1) unless the Administrator determines that a period...use of greater duration or mileage is appropriate; and (3) in the case of any motorcycle or motorcycle engine, be a period of use the Administrator shall...

...miles In the case of 'vehicles other than passenger cats. Congress provided for the same period ot use unless the Administrator determines that a period...Congress believed that the average useful life, or hail life, of heavy-duty vehicles or engines may be longer than for light-duty vehicles and left his...