40 CFR § 85.2101 - General applicability.

---
identifier: "/us/cfr/t40/s85.2101"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 85.2101 - General applicability."
title_number: 40
title_name: "Protection of Environment"
section_number: "85.2101"
section_name: "General applicability."
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"
---


# 85.2101 General applicability.

(a) Sections 85.2101 through 85.2111 are applicable to all 1981 and later model year vehicles subject to standards under 40 CFR part 86, subpart S.

(b) References in this subpart to engine families and emission control systems shall be deemed to apply to durability groups and test groups as applicable.

[89 FR 28152, Apr. 18, 2024]