Model year
Model year means one of the following things:
(1) For freshly manufactured vehicles (see definition of “new,” paragraph (1)), model year means one of the following:
(i) Calendar year.
(ii) Your annual new model production period if it is different than the calendar year. This must include 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. For seasonal production periods not including January 1, model year means the calendar year in which the production occurs, unless you choose to certify the applicable emission family with the following model year. For example, if your production period is June 1, 2010, through November 30, 2010, your model year would be 2010 unless you choose to certify the emission family for model year 2011.
(2) For an engine originally certified and manufactured as a motor vehicle engine or a stationary engine that is later used or intended to be used in a vehicle subject to the standards and requirements of this part 1051, model year means the calendar year in which the engine was originally produced. For an engine originally manufactured as a motor vehicle engine or a stationary engine without having been certified that is later used or intended to be used in a vehicle subject to the standards and requirements of this part 1051, model year means the calendar year in which the engine becomes subject to this part 1051. (See definition of “new,” paragraph (2)).
(3) For a nonroad engine that has been previously placed into service in an application covered by 40 CFR part 90, 91, 1048, or 1054, where that engine is installed in a piece of equipment that is covered by this part 1051, model year means the calendar year in which the engine was originally produced (see definition of “new,” paragraph (3)).
(4) For engines that are not freshly manufactured but are installed in new recreational vehicles, model year means the calendar year in which the engine is installed in the recreational vehicle (see definition of “new,” paragraph (4)).
(5) For imported engines:
(i) For imported engines described in paragraph (5)(i) of the definition of “new,” model year has the meaning given in paragraphs (1) through (4) of this definition.
(ii) For imported engines described in paragraph (5)(ii) of the definition of “new,” model year means the calendar year in which the vehicle is modified.
(iii) For imported engines described in paragraph (5)(iii) of the definition of “new” model year means the calendar year in which the engine is assembled in its imported configuration, unless specified otherwise in this part or in 40 CFR part 1068.
Source
40 CFR § 1051.801
Scoping language
The following definitions apply to this part. The definitions apply to all subparts unless we note otherwise. All undefined terms have the meaning the Act gives to them. The definitions follow: