---
kind: "section"
citation: "40 C.F.R. § 85.2303"
title: "40"
number: "85.2303"
heading: "Duration of model year."
url: "https://uscodex.org/cfr/40/85.2303"
---

# §85.2303. Duration of model year.


A specific model year must always include January 1 of the calendar year for which it is designated and may not include a January 1 of any other calendar year. Thus, the maximum duration of a model year is one calendar year plus 364 days.


## Notes

### Source

Source: 60 FR 4738, Jan. 24, 1995, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401-7671q.