US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 86 — CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINESSubpart B — Emission Regulations for 1977 and Later Model Year New Light-Duty Vehicles and New Light-Duty Trucks and New Otto-Cycle Complete Heavy-Duty Vehicles; Test Procedures86.10240 C.F.R. § 86.102Definitions.Last amended: 2017Year: 2026Length: 15 wordsOfficial source Cite as 40 C.F.R. § 86.102 (2026)The definitions in § 86.1803 apply to this subpart. [79 FR 23692, Apr. 28, 2014]Cross-references to the CFR86.1803Previous40 C.F.R. § 86.101Next40 C.F.R. § 86.103