Model Year

(1) A year that is used by a manufacturer of an engine as a model year shall:

1. if the period of production of a model of engine does not include January 1 of a calendar year, correspond to the calendar year during which the period of production falls; or
2. if the period of production of a model of engine includes January 1 of a calendar year, correspond to that calendar year.

(2) The period of production of a model of engine shall include only one January 1.