Model year

Model year means the calendar year in which an engine is manufactured (see date of manufacture), except as follows:
(1) Model year means the annual new model production period of the engine manufacturer in which an engine is manufactured (see “date of manufacture”), if the annual new model production period is different than the calendar year and includes January 1 of the calendar year for which the model year is named. It may not begin before January 2 of the previous calendar year and it must end by December 31 of the named calendar year.
(2) For an engine that is converted to a stationary engine after being placed into service as a nonroad or other non-stationary engine, model year means the calendar year or new model production period in which the engine was manufactured (see “date of manufacture”).

Source

40 CFR § 60.4219

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Scoping language

As used in this subpart, all terms not defined herein shall have the meaning given them in the CAA and in subpart A of this part.

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