The term “Administrator” means the Administrator of the Environmental Protection Agency.
The term “emerging technology” means a technology that is not currently, or has not been previously, certified or verified by the Administrator or the California Air Resources Board but for which an approvable application and test plan has been submitted for verification to the Administrator or the California Air Resources Board.
The term “fleet” means one or more diesel vehicles or mobile or stationary diesel engines.
The term “heavy-duty truck” has the meaning given the term “heavy duty vehicle” in section 7521 of this title.
The term “medium-duty truck” has such meaning as shall be determined by the Administrator, by regulation.