40 CFR § 85.2302 - Definition of model year.
---
identifier: "/us/cfr/t40/s85.2302"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 85.2302 - Definition of model year."
title_number: 40
title_name: "Protection of Environment"
section_number: "85.2302"
section_name: "Definition of model year."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "85"
part_name: "CONTROL OF AIR POLLUTION FROM MOBILE SOURCES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
cfr_part: "85"
---
# 85.2302 Definition of model year.
Model year means the manufacturer's annual production period (as determined under § 85.2304) which includes January 1 of such calendar year, provided, that if the manufacturer has no annual production period, the term “model year” shall mean the calendar year.