{"data":{"id":"us/40-cfr-86.404-78","jurisdiction":"us","citation":"40 CFR 86.404-78","heading":"-78 Section numbering.","body":"(a) The year of initial applicability of a section is indicated by its section number. The two digits following the hyphen designate the first model year for which a section is effective. A section remains effective until superseded.\nExample:\nSection 86.411-78 applies to 1978 and subsequent model years until it is superseded. If a § 86.411-81 is promulgated it would take effect beginning with 1981; § 86.411-78 would apply to years 1978 through 1980.\n(b) A reference to a section without a year designation implies the appropriate model year.\nExample:\nWhen considering 1979 vehicles a reference to § 86.411 implies § 86.411-79. However if no § 86.411-79 has been promulgated then § 86.411-78 is implied; See paragraph (a) of this section.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES","Subpart E—Emission Regulations for 1978 and Later New Motorcycles, General Provisions"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"988894aa8311955a8b0902b671ae436ed65be5afd687bbf41f589a56de0e6110","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-86.403-78","next":"us/40-cfr-86.405-78"},"notice":"GroundRules: Original legal text. Not legal advice."}